WO2010029628A1

WO2010029628A1 - Illumination system

Info

Publication number: WO2010029628A1
Application number: PCT/JP2008/066441
Authority: WO
Inventors: 雅人志賀; 忠幸北原; 諭神子; 小島　直人; 志郎福田
Original assignee: 株式会社ＭＥＲＳＴｅｃｈ
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2010-03-18

Abstract

An illumination system (100) has a presence detection sensor (80) which detects the presence/absence of a human (M) or a vehicle (V), an MERS (30) which is connected with an AC power supply (20) and a street lamp (60), and a control part (40) which varies the luminance of the street lamp (60) by varying the output voltage and the phase of the current of the MERS (30) according to an output signal from the presence detection sensor (80). The illumination system moreover has an adjustment part (74) which adjusts the luminance variation mode of the street lamp (60).

Description

Lighting system

The present invention relates to a lighting system.

In recent years, environmental problems such as air pollution and global warming have become particularly serious, and as an approach to environmental problems, reduction of energy consumption (energy saving) has been actively pursued.

For example, thermal power generation is one of the main power supply sources in Japan. In thermal power generation, carbon dioxide, which causes global warming, and atmospheric air as fuel such as oil, coal, and natural gas burns. Sulfur oxides and nitrogen oxides that cause pollution are emitted. Therefore, it is expected that the reduction of power consumption will reduce the emission of substances that cause greenhouse gases and air pollution, and this will lead to a reduction in the load on the global environment.

As one approach to energy saving, for example, an illuminating lamp control device including an inverter type fluorescent lamp and a control device that adjusts and controls the inverter type fluorescent lamp to a desired luminance has been proposed. According to this illuminating lamp control apparatus, the user can control the inverter type fluorescent lamp to a desired luminance, and wasteful power consumption can be suppressed. (See Patent Documents 1 and 2)
JP 2008-103352 A JP 2008-130437 A

However, in order to adjust and control the brightness when the lighting is turned on, an expensive inverter-type fluorescent lamp compatible with dimming control must be adopted, and other than the inverter-type fluorescent lamp compatible with dimming control It is difficult to dimm in the dimming direction with existing fluorescent lamps, discharge lamps such as mercury lamps and sodium lamps.

For example, many lighting lamps for road use, such as mercury lamps and sodium lamps having a large light amount and a long life, are used, and a mechanism for dimming control of these discharge lamps in the dimming direction is not provided. Therefore, at present, the road illumination lamp is always lit at a rated level even when there is no vehicle on the road. Therefore, useless power is consumed.

Also, for example, in tunnels, parks, passages in buildings, etc., there are many cases in which discharge lamps are kept lit even though there are no vehicles or people present, and power is wasted. Is consumed.

In this way, lighting (especially discharge lamps) for roads, parks, buildings, etc., which has been conventionally known as “light-on”, can be turned on and off and the amount of light can be adjusted as necessary. Thus, a proposal that can contribute to power saving has been demanded.

Furthermore, there is a desire to adjust the lighting / light-out and brightness adjustment mode of the lamp according to the situation. For example, in road lighting, even if the brightness is adjusted to be low for power saving, it is necessary to increase the brightness instantaneously when a car approaches at high speed. When approaching, it may be sufficient to gradually increase the brightness.

In some cases, it is necessary to change the aspect of the luminance change in accordance with the degree of approach of an object such as a car or a person (distance to the object, approach speed, etc.). There is also a desire to change the luminance change mode between an illumination lamp installed outdoors and an illumination lamp installed indoors.

The present invention has been made in view of the above circumstances, and it is possible to reduce the useless power consumption by controlling the dimming of the illuminating lamp, and to change the aspect of the luminance change according to the situation. It is an exemplary problem to provide

In order to solve the above problems, an illumination system according to an exemplary aspect of the present invention is connected between an object detection unit that detects the presence / absence of an object, a power source, and an illumination lamp, and illuminates from the power source. Load power adjustment switch that adjusts the load power to turn on the illuminating lamp that is output to the lamp, and is connected to the object detection means and the load power adjustment switch, and adjusts the load power based on the output signal from the object detection means A control system for changing the brightness of the illumination lamp by changing the magnitude of the output voltage of the switch and the phase of the current, and a brightness change mode adjustment means for adjusting the brightness change mode of the illumination lamp It has further.

The load power adjustment switch has at least two reverse conduction type semiconductor switches and a capacitor for accumulating magnetic energy of current at the time of current interruption and regenerating to the illuminating lamp. The load power supplied to the illuminating lamp may be adjusted by controlling the gate phase.

Since the brightness of the illuminating lamp can be changed as necessary, so-called “spot-off” can be prevented, and illumination can be performed with the necessary brightness only in a necessary situation, thereby contributing to power saving. . In addition, since the luminance change mode adjustment means adjusts the mode of the luminance change, variations of the luminance change mode (from “high luminance” to “low luminance” or from “low luminance” to “high luminance”) are variations. It can be enriched. Since it is not always a constant brightness change mode, it can be a quick brightness change or a slow brightness change depending on the situation, so it is possible to appropriately adjust the brightness change mode according to the position of the object and its approach speed it can.

The luminance change mode may be a luminance change speed. For example, when a vehicle as an object approaches at high speed, the luminance is changed at a high luminance change speed, and when a person as an object approaches by walking (that is, at a relatively low speed), the luminance is changed at a low luminance change speed. Can be changed. It is possible to adjust the speed of the luminance change according to the approach speed of the object.

The control means may increase the luminance of the illuminating lamp when the object is present and decrease the luminance of the illuminating lamp when the object is not present. Since the luminance is increased when the object is present, it can be illuminated brightly when illumination is necessary. On the other hand, since the luminance is lowered when the object is not present, it is possible to save power when illumination is unnecessary.

Stepwise change may be at least one of the increase or decrease in luminance. For example, by increasing the brightness step by step as the object approaches, and by decreasing the brightness step by step as the object moves away, it is possible to achieve both proper illumination brightness and power saving, and to adjust the brightness. Control can be simplified. Here, the number of steps of luminance change is arbitrary. The luminance may be changed in two steps according to the distance to the object, or the luminance may be changed in ten steps. It is also possible to change the number of steps according to the approach speed. Of course, you may comprise this illumination system so that a continuous brightness | luminance change may be implement | achieved so that it may be proportional to the square of the distance with a target object instead of a stepwise brightness | luminance change.

The control means may change the luminance of the illuminating lamp according to the distance between the object detection means and the object. As described above, if the luminance of the illuminating lamp is changed according to the distance between the target object detection means and the target object, it is possible to save power while eliminating the uncomfortable feeling of the luminance change.

Even if the object detection means detects the presence / absence of the object based on at least one of temperature change, presence / absence of motion, or magnetic field change in the detection region, or information transmission / reception with the object. Good.

For example, when the object is a person, the presence / absence of the object can be detected based on the body temperature, movement, and the like. When the object is an automobile, the presence / absence of the object can be detected based on the temperature, movement, magnetic field change, and the like. When the object is a mobile phone or an information terminal possessed by a person, the presence / absence of the object is detected based on information transmission / reception (for example, radio waves, infrared rays, etc.) between the object detection means and the object. Can do.

There may be a plurality of illuminating lamps arranged substantially in a straight line, and the luminance of the illuminating lamps may be changed periodically by changing the phase stepwise for a predetermined time when an object is present. Further, the object detection means may be a speed sensor that detects the speed of the object in the detection region.

As a load power adjustment switch, for example, a magnetic energy regenerative switch and control means can be used to construct an illumination system using an existing illumination light. It is possible to construct a system that can change luminance (brightness and darkness) at low cost without using an inverter-type illumination lamp that supports dimming control.

If the brightness change of the illuminating lamp is realized using a magnetic energy regenerative switch as a load power adjustment regenerative switch, it is not necessary to use an inverter circuit. Therefore, the generation of harmonic noise can be minimized, and adverse effects on the surroundings due to the noise generation can be reduced. Here, the object means all objects to be illuminated with illumination light, and for example, a person or a car corresponds to the object. In addition, for example, radio wave sources such as mobile phones and metal products, magnetic sources, and the like are also included in the object.

Further objects and other features of the present invention will become apparent from the preferred embodiments described below with reference to the accompanying drawings.

According to the present invention, it is possible to control the dimming of the illuminating lamp to reduce useless power consumption, and to change the aspect of the luminance change according to the situation.

It is a figure which shows the basic composition of a MERS embedded system. FIG. 2A and FIG. 2B are diagrams for explaining MERS switching control by the control unit. FIG. 3A and FIG. 3B are diagrams for explaining MERS switching control by the control unit. FIG. 4A and FIG. 4B are diagrams for explaining MERS switching control by the control unit. FIGS. 5A, 5 B, 5 C, and 5 D are diagrams for explaining operation results of the MERS embedded system. It is a graph which shows load voltage / rated voltage when changing gate phase angle (alpha). It is a figure which shows the other aspect of MERS. It is a figure which shows the other aspect of MERS. It is a block block diagram which shows schematic structure of the illumination system which concerns on Embodiment 1 of this invention. It is a block block diagram for demonstrating schematic structure of the light control part in the illumination system shown in FIG. It is a block block diagram which shows schematic structure of the illumination system which concerns on Embodiment 2 of this invention. It is a block block diagram which shows schematic structure of the illumination system which concerns on Embodiment 3 of this invention. It is a figure which shows the action | operation of the illumination system shown in FIG. It is a graph which shows the setting for the action | operation of the illumination system shown in FIG.

Explanation of symbols

α: Gate phase angle M: Person (object)
V: Automobile (object)
SW1 to SW8: Reverse conducting semiconductor switches G1 to G4: Gates D1 and D2 of the reverse conducting semiconductor switches SW1 to SW4: Diodes DC (P), DC (N): DC terminal AC: AC terminal 10: MERS embedded system
20: AC power supply
30: Magnetic energy regenerative switch (MERS)
32, 33, 34, 35, 36: Capacitor
40: Control unit (control means)
50: Inductive load
60: Street lamp (illumination lamp)
65, 65a, 65b, 65c, 65d, 65e, 65f, 65g, 65h: illumination lamp 70: dimming control unit 72: signal control unit
74: Adjustment unit (luminance change mode adjustment means)
75: Guidance speed adjustment unit 80: Presence detection sensor (object detection means)
81: Detection range 90: Distance sensor (object detection means)
91: Detection range 95: Speed sensor (object detection means)
96:

Detection range

100, 200, 300: Illumination system

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments according to the present invention will be described with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. Further, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

The illumination system according to the present embodiment is connected between an object detection unit that detects the presence / absence of an object and a power source and an illumination lamp, and lights the illumination lamp that is output from the power source to the illumination lamp. A load power adjustment switch that adjusts the load power for the control, and a control means (control unit) that is connected to the load power adjustment switch and changes the luminance of the illumination lamp by controlling the gate phase of the load power adjustment switch. The illumination system further includes brightness change mode adjusting means for adjusting the brightness change mode of the illuminating lamp. The load power adjustment switch is, for example, a magnetic energy regeneration switch (Magnetic Energy Recovery Switch: MERS) (hereinafter referred to as MERS).

MERS, for example, does not have reverse blocking capability, that is, it can be turned on / off in both forward and reverse directions only by gate control using four reverse conducting semiconductor elements, and has current when the current is cut off. It is a switch that can regenerate magnetic energy without loss by accumulating magnetic energy in a capacitor and releasing it to the load side through a semiconductor element provided with an ON gate. This is an energy regeneration switch. (For example, refer to Japanese Patent No. 3634882. In this patent publication, a full bridge type MERS is disclosed.)

In MERS, a semiconductor element capable of forward control, such as a transistor in which power MOSFETs and diodes are connected in antiparallel, is used as a reverse conducting semiconductor element. The MERS is configured by connecting a bridge circuit composed of four semiconductor elements of the reverse conduction type and a capacitor that absorbs and releases magnetic energy to the positive electrode and the negative electrode of the bridge circuit. And MERS can flow an electric current to either direction by controlling the gate phase of these four reverse conduction type semiconductor elements.

MERS is a pair of two reverse conducting semiconductor elements located on a diagonal line among four reverse conducting semiconductor elements connected in a bridge. The operation is performed in synchronization with the frequency, and when one pair is ON, the other pair is OFF. In addition, the capacitor repeatedly charges and discharges magnetic energy in accordance with the ON / OFF switching timing.

Then, when an OFF gate is given to one pair and an ON gate is given to the other pair, the current conducted in the forward direction becomes the second diode of the other pair, the second diode of the other pair. It flows through a path called a diode, which charges the capacitor. That is, the magnetic energy of the current is stored in the capacitor. The magnetic energy of the current at the time of current interruption is accumulated in the capacitor until the voltage of the capacitor rises and the current becomes zero. When the capacitor voltage increases until the capacitor current reaches zero, the current interruption is complete. At this time, since the ON gate is already given to the other pair, the charge of the capacitor is discharged to the load side through the semiconductor element that is turned ON, and the magnetic energy accumulated in the capacitor is regenerated to the load side.

Thus, MERS outputs the output of MERS by controlling the gate phase of two pairs of two reverse conducting semiconductor elements located on the diagonal line among the four reverse conducting semiconductor elements. It is possible to arbitrarily control the magnitude of the voltage and the phase of the current.

The control unit has a function of changing the luminance of the illuminating lamp (brightness / darkness change) by controlling the gate phase of the MERS in accordance with the detection result (output signal) from the object detection means. Furthermore, the brightness of the illuminating lamp can be changed in a desired manner by the brightness change mode adjusting means.

First, the configuration and operation of MERS as a load power adjustment switch will be described. In this embodiment, a MERS embedded system in which MERS is connected in series between an AC power source and a dielectric load will be described as an example. In addition, MERS can comprise an alternating current power supply device by incorporating it into an alternating current power source, and can constitute a MERS built-in load by incorporating it into an inductive load.

FIG. 1 is a diagram showing a basic configuration of the MERS embedded system 10.

1, the MERS embedded system 10 includes an AC power supply 20 and an inductive load 50 having inductance. As the inductive load 50, two 40 W fluorescent lamps are connected in parallel. MERS 30 is inserted between AC power supply 20 and inductive load 50. The MERS embedded system 10 includes a control unit 40 that controls switching of the MERS 30.

The MERS 30 is a magnetic energy regenerative switch that can control currents in both forward and reverse directions and can regenerate magnetic energy to the load side without loss. The MERS 30 is an energy storage device that absorbs the magnetic energy of the current that flows through the bridge circuit composed of four reverse conducting semiconductor switches SW1, SW2, SW3, and SW4 and when the reverse conducting semiconductor switch of the bridge circuit is cut off. And a capacitor 32.

In the bridge circuit, a reverse conducting semiconductor switch SW1 and a reverse conducting semiconductor switch SW4 are connected in series, a reverse conducting semiconductor switch SW2 and a reverse conducting semiconductor switch SW3 are connected in series, and they are connected in parallel. Is formed.

The capacitor 32 is at a connection point between the DC terminal DC (P) at the connection point between the reverse conduction type semiconductor switch SW1 and the reverse conduction type semiconductor switch SW3, and between the reverse conduction type semiconductor switch SW2 and the reverse conduction type semiconductor switch SW4. It is connected to a direct current terminal DC (N). In addition, an inductive load 50 is at the connection point between the reverse conduction semiconductor switch SW2 and the reverse conduction semiconductor switch SW3 at the AC terminal at the connection point between the reverse conduction semiconductor switch SW1 and the reverse conduction semiconductor switch SW4. An AC power source 20 is connected in series to each AC terminal.

A first pair of reverse conducting semiconductor switches SW1 and SW2 located on the diagonal line disposed in the MERS 30 and a second pair of reverse conducting semiconductor switches SW3 and SW4 also located on the diagonal line are connected to the power source. It is turned ON / OFF alternately in synchronization with the frequency. That is, when one pair is ON, the other pair is OFF. Then, for example, when an OFF gate is given to the first pair and an ON gate is given to the second pair, the current conducted in the forward direction becomes the second pair of reverse conduction type semiconductor switches SW3-capacitors 32. The reverse conduction type semiconductor switch SW4 flows through the path, whereby the capacitor 32 is charged. That is, the magnetic energy of the current is stored in the capacitor 32.

The magnetic energy of the current at the time of current interruption is accumulated in the capacitor until the voltage of the capacitor 32 increases and the current becomes zero. When the voltage of the capacitor 32 increases until the capacitor current becomes zero, the current interruption is completed. . At this time, since the ON gate is already given to the second pair, the charge of the capacitor 32 is discharged to the inductive load 50 through the reverse conducting semiconductor switches SW3 and SW4 which are turned on and accumulated in the capacitor 32. Magnetic energy is regenerated to the inductive load 50.

When the current is turned on / off, a pulse voltage is applied to the inductive load 50. The magnitude of the voltage depends on the capacitance of the capacitor 32 and the reverse conduction type semiconductor switches SW1 to SW4 and the inductive load 50 are resistant to each other. It can be within the allowable voltage range. Further, unlike the conventional series power factor correction capacitor, a direct current capacitor can be used for MERS30. The reverse conducting semiconductor switches SW1 to SW4 are made of, for example, power MOSFETs and have gates G1, G2, G3, and G4, respectively. Body diodes (parasitic diodes) are connected in parallel to the channels of the reverse conducting semiconductor switches SW1 to SW4.

In addition to the body diode, a diode may be added in reverse parallel to the reverse conducting semiconductor switches SW1 to SW4. As the reverse conducting semiconductor switches SW1 to SW4, for example, an element such as an IGBT or a transistor having a diode connected in antiparallel can be used.

The control unit 40 controls switching of the reverse conducting semiconductor switches SW1 to SW4 of the MERS 30. Specifically, a pair ON / OFF operation composed of reverse conducting semiconductor switches SW1, SW2 located on a diagonal line in the bridge circuit of MERS 30 and a pair ON / OFF operation composed of reverse conducting semiconductor switches SW3, SW4 are provided. The control signal is transmitted to the gates G1 to G4 so that each of them is simultaneously performed every half cycle so that when one is ON, the other is OFF.

Subsequently, switching control of the MERS 30 by the control unit 40 will be described in detail. 2A, 2 B, 3 A, 3 B, 4 A, and 4 B are diagrams for explaining switching control of the MERS 30 by the control unit 40.

First, when the control unit 40 turns on the reverse conducting semiconductor switches SW1 and SW2 in a state where the capacitor 32 has no charging voltage, as shown in FIG. 2A, the current is reverse conducting semiconductor switches SW3 and SW1. And a path passing through the reverse conduction type semiconductor switches SW2 and SW4, and enters a parallel conduction state.

Next, the control unit 40 turns off the reverse conducting semiconductor switches SW1 and SW2 at a predetermined timing before the voltage of the AC power supply 20 is reversed, for example, about 2 ms. (This corresponds to a gate phase angle α for controlling the reverse conducting semiconductor switch of about 36 deg when the AC frequency is 50 Hz.) As a result, as shown in FIG. It flows through a path passing through the type semiconductor switch SW3-capacitor 32-reverse conducting type semiconductor switch SW4. As a result, the magnetic energy is absorbed (charged) in the capacitor 32. In this embodiment, the reverse conducting semiconductor switches SW3 and SW4 are turned on at the timing when the reverse conducting semiconductor switches SW1 and SW2 are turned off.

When the charging of the capacitor 32 is completed, that is, when the voltage of the capacitor 32 exceeds a predetermined value, the current is cut off. When the voltage of the AC power supply 20 is inverted, the reverse conducting semiconductor switches SW3 and SW4 are already ON, and the capacitor 32 has a charging voltage. Therefore, as shown in FIG. It flows through a path passing through the semiconductor switch SW4-capacitor 32-reverse conducting semiconductor switch SW3. Then, the magnetic energy accumulated in the capacitor 32 is released (discharged).

Next, when the discharge from the capacitor 32 is completed, as shown in FIG. 3B, the current flows through a path passing through the reverse conducting semiconductor switches SW1 and SW3 and a path passing through the reverse conducting semiconductor switches SW4 and SW2. The parallel conduction state is established.

Next, at a predetermined timing before the voltage of the AC power supply 20 is inverted, the control unit 40 turns off the reverse conducting semiconductor switches SW3 and SW4. As a result, as shown in FIG. 4A, the current flows through a path passing through the reverse conducting semiconductor switch SW1-capacitor 32-reverse conducting semiconductor switch SW2. As a result, the magnetic energy is absorbed by the capacitor 32. In this embodiment, the reverse conducting semiconductor switches SW1 and SW2 are turned on at the timing when the reverse conducting semiconductor switches SW3 and SW4 are turned off.

When the charging of the capacitor 32 is completed, the current is cut off, and when the voltage of the AC power supply 20 is inverted, the reverse conducting semiconductor switches SW1 and SW2 are already ON, and the capacitor 32 has a charging voltage. ), The current flows through the path through the reverse conducting semiconductor switch SW2-capacitor 32-reverse conducting semiconductor switch SW1. Then, the magnetic energy accumulated in the capacitor 32 is discharged. When the discharge from the capacitor 32 is completed, the parallel conduction state shown in FIG. Thus, the MERS 30 can flow a current in both directions by alternately bringing two pairs of opposing conductive semiconductor switches facing each other into a conductive state.

The following effects can be obtained by such switching control of the MERS 30. FIGS. 5A, 5B, 5C, and 5D show the MERS embedded system 10 in the case where the gate phase angle α for controlling the reverse conducting semiconductor switch is about 36 deg when the AC frequency is 50 Hz. It is a figure for demonstrating the operation result of. 5A shows the waveforms of the power supply voltage and current when the MERS 30 is not incorporated, and FIG. 5B shows the waveforms of the power supply voltage, current, and load voltage when the MERS 30 is incorporated. Yes. FIG. 5C shows the waveform of the capacitor voltage and the current flowing through the reverse conducting semiconductor switch SW1, and FIG. 5D shows the timing when the reverse conducting semiconductor switch SW1 is turned on.

As shown in FIG. 5A, when the MERS 30 is not incorporated, the phase of the current is delayed from the phase of the power supply voltage due to the influence of the inductive load 50. Therefore, the power factor of the AC power supply 20 is smaller than 1. On the other hand, when the MERS 30 is inserted in series between the AC power supply 20 and the inductive load 50, the phase of the current can be advanced as shown in FIG. Can be close to 1.

That is, the MERS 30 stores the magnetic energy of the inductive load 50 in the capacitor 32 by adjusting the gate phase of the two pairs on the diagonal line of the reverse conducting semiconductor switches SW1 to SW4, and advances the phase of the current. As a result, the power factor of the AC power supply 20 can be brought close to 1. In addition, the MERS 30 can not only advance the phase of the current but also can arbitrarily control the phase of the current, whereby the power factor can be arbitrarily adjusted. Furthermore, by storing the magnetic energy of the inductive load 50 in the capacitor 32 and regenerating the stored magnetic energy in the inductive load 50, the load voltage can be increased or decreased steplessly.

Further, as shown in FIGS. 5C and 5D, when the reverse conducting semiconductor switch SW1 is turned on, the capacitor voltage is 0, and the current flowing through the reverse conducting semiconductor switch SW1 is parallel. This is a current that flows through the diode of the reverse conducting semiconductor switch SW1 when conducting. The capacitor voltage is 0 even when the reverse conducting semiconductor switch SW1 is turned off. That is, switching is performed at 0 voltage and 0 current, and therefore loss due to switching can be eliminated. Since the other three reverse conducting semiconductor switches SW2 to SW4 are switched in synchronization with the reverse conducting semiconductor switch SW1, the same result is obtained.

As described above, FIGS. 5A, 5 B, 5 C, and 5 D are obtained when the gate phase angle α for controlling the reverse conducting semiconductor switch is about 36 deg when the AC frequency is 50 Hz. Although the operation result of the MERS embedded system 10 is shown, the gate phase angle α for controlling the reverse conducting semiconductor switch of the MERS 30 can be continuously controlled from 0 deg to 360 deg. FIG. 6 shows measured values of load voltage / rated voltage when the gate phase angle α for controlling the reverse conducting semiconductor switch is changed when two 40 W fluorescent lamps are used as loads. The rated voltage is a voltage corresponding to 100% of the power supply voltage. The load voltage / rated voltage increases as the gate phase angle α increases from 0 deg, reaches a maximum value of about 140% at the gate phase angle α = about 90 deg, decreases as the gate phase angle α further increases, and decreases to the gate phase. At the angle α = 180 deg, it decreases to about 50%. On the way, the gate phase angle α = about 135 deg and the load voltage / rated voltage = 1. Therefore, the load voltage can be continuously controlled from about 60% to 130% of the power supply voltage by controlling the gate phase angle α of the MERS 30 by about ± 30 deg with respect to 135 deg. When the gate phase angle α is controlled in the range from 180 deg to 360 deg, the result is the same as when the direction is changed from 180 deg to 0 deg.

The charging / discharging cycle of the capacitor 32 is a half cycle of the resonance cycle of the inductive load 50 and the capacitor 32. When the switching cycle is longer than the resonance cycle of the inductive load 50 and the capacitor 32, the MERS 30 has a gate phase angle α. Regardless of the case, zero voltage zero current switching, that is, soft switching is always possible.

Unlike the conventional voltage type inverter, the capacitor 32 used in the MERS 30 is only for storing the magnetic energy of the inductance in the circuit. For this reason, the capacitor capacity can be significantly reduced as compared with the voltage source capacitor of the conventional voltage type inverter. The capacitor capacity is selected so that the resonance period with the load is shorter than the switching frequency. For this reason, harmonic noise that tends to be a problem in the conventional voltage type inverter hardly occurs in the switching in the MERS 30. Therefore, the adverse effects of harmonic noise on precision instruments and measuring instruments hardly occur in MERS 30, and MERS 30 can be used with peace of mind in hospitals and the like. Moreover, since it is soft switching, there is little power loss and there is also little heat_generation | fever.

Also, when the MERS 30 is used as a gate pulse generator, each MERS 30 can be given a unique ID number, and this can be used to control each MERS 30 by receiving an external control signal. For example, the MERS 30 can be wirelessly controlled by sending a control signal wirelessly using a communication line such as the Internet.

In the MERS embedded system 10 described above, the MERS 30 has a configuration including a bridge circuit formed by four reverse conducting semiconductor switches SW1 to SW4 and a capacitor 32 connected between the DC terminals of the bridge circuit. May have the following configuration.

7 and 8 are diagrams showing other modes of the MERS 30. FIG. The MERS 30 shown in FIG. 7 has two reverse-conducting semiconductor switches, two diodes and two full-conducting MERS 30 composed of the four reverse-conducting semiconductor switches SW1 to SW4 and one capacitor 32 described above. It is a vertical half-bridge type composed of two capacitors.

More specifically, the vertical half-bridge MERS 30 is provided in parallel with two reverse conducting semiconductor switches SW5 and SW6 connected in series and the two reverse conducting semiconductor switches SW5 and SW6. , Two

capacitors

33 and 34 connected in series, and two diodes D1 and D2 connected in parallel with the two

capacitors

33 and 34, respectively.

The MERS 30 shown in FIG. 8 is a horizontal half-bridge type. The horizontal half-bridge MERS is composed of two reverse conducting semiconductor switches and two capacitors.

More specifically, the horizontal half-bridge structure MERS 30 includes a reverse conducting semiconductor switch SW7 and a capacitor 35 provided in series on the first path, and a series on a second path parallel to the first path. Includes a reverse conducting semiconductor switch SW8 and a capacitor 36, and wirings connected in parallel to the first and second paths.

[Embodiment 1]
Subsequently, the illumination system according to Embodiment 1 of the present invention will be described.

FIG. 9 is a block configuration diagram showing a schematic configuration of the illumination system 100 according to Embodiment 1 of the present invention. The lighting system 100 can be applied to outdoor lighting such as street lighting and lighting for facilities such as stadiums, and indoor lighting in stores, hotels, private houses, and the like. In the first embodiment, an example in which the lighting system 100 is applied to a streetlight installed mainly on a road through which a person passes will be described. The lighting system 100 may be configured using existing street lamp equipment. As will be described later, the lighting system 100 is mainly used on a highway through which a car passes by coordination of a plurality of street lamps (illumination lamps) 60 and adjustment of a luminance change speed by an adjustment unit 74 (see FIG. 10). It can be applied to installed highway lighting.

As shown in FIG. 9, the illumination system 100 according to the first embodiment generally includes a MERS 30, a streetlight (illumination lamp) 60, a dimming control unit 70, and a presence detection sensor (object detection means) 80. Has been. The MERS 30 is connected to the streetlight 60 and the dimming control unit 70, and the presence detection sensor 80 is connected to the dimming control unit 70.

A plurality of street lamps 60 are installed along the road, and a plurality of light control units 70 and MERS 30 are installed so as to correspond to each of them. Each MERS 30 is connected to the AC power source 20. In the vicinity of each streetlight 60, a presence detection sensor 80 is installed.

FIG. 10 is a block configuration diagram for explaining a schematic configuration of the dimming control unit 70. FIG. 10 shows a connection state of the MERS 30, the dimming control unit 70, and the presence detection sensor 80 corresponding to one street lamp 60 among the plurality of street lamps 60. The dimming control unit 70 has a control unit (control unit) 40, a signal control unit 72, and an adjustment unit (luminance change mode adjustment unit) 74 inside.

The MERS 30 is a magnetic energy regenerative switch as described above, and is connected to the street lamp 60 and the dimming control unit 70 to adjust the brightness of the street lamp 60 based on gate phase control from the dimming control unit 70. More specifically, the control unit 40 controls the gate phase of the MERS 30 based on the output from the presence detection sensor 80 so that the streetlight 60 becomes brighter or darker.

The street lamp 60 is an illumination lamp installed along the road. In the present lighting system 100, it is possible to divert the existing street lamp 60 without having to separately install the street lamp 60. The streetlight 60 may be, for example, a discharge lamp such as a fluorescent lamp, a mercury lamp, or a sodium lamp. The streetlight 60 illuminates the road and contributes to ensuring the safety of people passing through the road. In the lighting system 100 according to the first embodiment, when there is no person passing through, the brightness of the street lamp 60 is reduced to reduce power consumption, and when the person approaches, the brightness of the street lamp 60 automatically increases. To ensure safety. The change in luminance is realized by gate phase control from the control unit 40.

The presence detection sensor 80 is a sensor for detecting the presence / absence of the person M as an object. The presence detection sensor 80 has a detection range 81 indicated by a broken line in FIG. 10, and when a person M exists in the detection range 81, the presence signal is directed toward the signal control unit 72 of the dimming control unit 70. When there is no person M in the detection range 81, a non-existence signal is transmitted toward the signal control unit 72 of the dimming control unit 70.

The presence detection sensor 80 may be an infrared sensor, for example, and may detect the presence / absence of the person M within the detection range 81 based on the body temperature of the person M. The presence detection sensor 80 may be a CCD camera, for example, and may detect the presence / absence of the person M within the detection range 81 based on the movement of the person M.

Further, the presence detection sensor 80 may have an information communication function and perform information transmission / reception with a communication device such as a mobile phone possessed by the person M. According to this, the information transmitted from the presence detection sensor 80 is received by the communication device, and the reception confirmation information transmitted from the communication device is received by the presence detection sensor 80, so that the person M is within the detection range 81. Detect the presence.

The dimming control unit 70 includes a control unit (control means) 40, a signal control unit 72, and an adjustment unit 74 inside. Based on the presence / absence of the person M within the detection range 81, the street light 60 It has a function to change the brightness. The luminance change is performed based on the gate phase control of the MERS 30 by the control unit 40 as described above.

The signal control unit 72 is for receiving a signal from the presence detection sensor 80. When the person M exists within the detection range 81, the signal control unit 72 receives a “presence” signal from the presence detection sensor 80. And the signal control part 72 makes the control part 40 perform gate phase control for the streetlight 60 to light-emit with the brightness | luminance based on rated load electric power.

On the other hand, when the person M is not present in the detection range 81, the signal control unit 72 receives a “non-existence” signal from the presence detection sensor 80. And the signal control part 72 makes the control part 40 perform gate phase control for light emission with the brightness | luminance based on the electric power (for example, 1/10 electric power) in which the streetlight 60 is lower than rated load electric power. As a result, when the person M is not present in the detection range 81, the brightness of the street lamp 60 is reduced, and when the person M is present within the detection range 81, the brightness of the street lamp 60 is increased.

Specifically, as shown in FIG. 10 (solid line graph), the control unit 40 recognizes that the person M is outside the detection range 81 and is “not present” by the presence detection sensor 80 at time t1. In some cases, the MERS 30 is controlled so that the streetlight 60 performs illumination with a luminance L1 that is 1/10 of the luminance L3 based on the rated load power. Then, when the person M enters the detection range 81 and the presence detection sensor 80 recognizes “present” at time t4, the control unit 40 increases the brightness of the streetlight 60 until the brightness L3 is reached. Further, when the person M advances and goes out of the detection range 81 and the presence detection sensor 80 recognizes “non-existence” at time t6, the control unit 40 reduces the luminance of the streetlight 60 to the luminance L1.

As described above, when the person M enters the detection range 81, the street lamp 60 becomes bright and contributes to ensuring safety. When the person M comes out of the detection range 81, the street lamp 60 becomes dark and saves. It can contribute to electric power.

The adjustment unit 74 is for adjusting the luminance change mode of the streetlight 60, and has luminance change speed information inside. The luminance change rate information includes luminance increase rate information and luminance decrease rate information. Among the luminance increase rate information, the detection state of the person M in the detection range 81 changes from “non-existing” to “existing”. Information on the speed at which the luminance of the streetlight 60 is increased. Luminance change rate information is defined by the amount of change in luminous intensity and luminance per unit time such as OOcd / sec, OOlx / sec, etc., but as per OOW / sec, Of course, it may be defined by the amount of change in load power. Moreover, in this lighting system 100, since the control part 40 adjusts the load electric power of the streetlight 60 by performing the gate phase control of MERS30, the variation | change_quantity of the gate phase per unit time like (circle) deg / sec. Of course, it may be defined as

The amount of change per unit time does not have to be constant. For example, in order to reduce a sense of incongruity for the person M, the amount of change per unit time is small at the beginning of the change, and the amount of change per unit time gradually increases. Can also be set. Also, the amount of change per unit time can be set so that the rate of change per unit time is constant. In addition, the amount of change per unit time can be made variable according to ambient illuminance, time, weather conditions, and the like.

Further, when the detection state of the person M in the detection range 81 changes from “presence” to “non-existence”, the luminance decrease speed information of the street lamp 60 has the same amount of change as the luminance increase speed information and has an opposite sign. It may be defined, or a numerical value different from the brightness increase speed information may be defined.

The time t5 when the luminance of the streetlight 60 reaches the luminance L3 and the time t7 when it returns to the luminance L1 are based on the luminance increasing speed information and the luminance decreasing speed information in the adjusting unit 74.

When the presence detection sensor 80 detects the presence of the person M and the signal control unit 72 sends a control command to increase the luminance of the streetlight 60 to the control unit 40, the control unit 40 transmits luminance increase speed information in the adjustment unit 74. The gate phase control of the MERS 30 is performed based on the above, and the luminance of the street lamp 60 is increased based on the set luminance increase speed. On the other hand, when the presence detection sensor 80 detects the absence of the person M and the signal control unit 72 sends a control command for reducing the luminance of the streetlight 60 to the control unit 40, the control unit 40 determines the luminance in the adjustment unit 74. The gate phase control of the MERS 30 is performed based on the decrease speed information, and the brightness of the street lamp 60 is decreased based on the set brightness decrease speed.

The luminance change rate information (luminance increase rate information, luminance decrease rate information) can be set individually according to the application of the lighting system 100. Therefore, when the lighting system 100 is applied to a streetlight 60 mainly installed on a road through which a person passes, as in the first embodiment, the moving speed of the person M as an object is relatively low. The brightness change speed information is set so that the brightness change is performed at a relatively low speed.

Since the luminance change is performed at a relatively low speed, a large current load is not applied to the street lamp 60 or the MERS 30. Therefore, the durability (life) of the entire lighting system 100 can be improved. In addition, power consumption due to a large current load can be reduced, which contributes to power saving. If the luminance change is rapid, the person M passing the road may be surprised. However, if the luminance change changes slowly, the person M is comfortable with little discomfort.

On the other hand, when this lighting system 100 is applied to, for example, a highway illumination lamp installed on an expressway, the object is not a person M but an automobile that passes mainly at high speed. Therefore, in this case, the luminance change speed information of the adjustment unit 74 is set so that the luminance change is performed at a relatively high speed.

Further, as shown in FIG. 9, the lighting system 100 is provided with a plurality of street lamps 60 along the road, and a plurality of dimming control units 70, presence detection sensors (object detection means) corresponding to each of them. ) Since 80 and MERS 30 are installed, a plurality of street lamps 60 can be coordinated when the brightness of the street lamp 60 is changed for an automobile traveling at high speed.

Specifically, as shown in FIG. 10 (dotted line graph), a presence detection sensor (object detection means) corresponding to a streetlight 60 adjacent to the streetlight 60 whose brightness is to be adjusted by the automobile at time t2. When the presence detection sensor 80 enters the detection range 81 of 80 and recognizes “existence”, the signal is transmitted to the dimming control unit 70 of the streetlight 60 whose luminance is to be adjusted, and the signal control unit 72 The control unit 40 changes the luminance of the streetlight 60 to an intermediate luminance L2 (for example, half the luminance L3 based on the rated load power) based on the information of the adjustment unit 74. Raise until it reaches. Further, when the vehicle advances and enters the detection range 81 of the streetlight 60 whose luminance is to be adjusted, and the presence detection sensor 80 recognizes “existence” at time t4, the signal control unit 72 “exists in its own streetlight area”. The controller 40 increases the luminance of the streetlight 60 until it reaches the luminance L3 based on the rated load power. When the vehicle further advances and goes out of the detection range 81 and the presence detection sensor 80 recognizes “non-existence” at time t6, the control unit 40 reduces the luminance of the streetlight 60 to the luminance L1. Similarly, the time t3 when the luminance of the streetlight 60 reaches the luminance L2, the time t5 when the luminance reaches the luminance L3, and the time t7 when the luminance returns to the luminance L1 are based on the luminance increasing speed information and the luminance decreasing speed information in the adjustment unit 74.

In this way, not only the detection range 81 of the streetlight 60 whose luminance is to be adjusted, but also the detection range 81 of the presence detection sensor 80 corresponding to the adjacent streetlight 60 in the lighting system 100 is used to recognize the presence of the automobile. Since the brightness of the street lamp 60 is adjusted, sufficient illumination is provided without delay for a car passing at high speed, thereby ensuring safety. In addition, since the brightness of the streetlight 60 is increased after the vehicle enters the detection range 81 corresponding to the adjacent streetlight 60, the brightness is increased in two steps, and the brightness of the vehicle driver suddenly increases. Can be avoided. In addition, the brightness adjustment is not limited to two stages, and the brightness adjustment is performed in three or more stages by using the presence detection sensor 80 corresponding to the adjacent streetlight 60. Similarly, it can be made variable according to ambient illuminance, time, weather conditions, and the like.

[Embodiment 2]
FIG. 11 is a block configuration diagram showing a schematic configuration of the illumination system 200 according to Embodiment 2 of the present invention. The illumination system 200 has substantially the same configuration as the illumination system 100 according to the first embodiment, but includes a distance sensor 90 instead of the presence detection sensor 80. Also in the second embodiment, the illumination system 200 is constructed using street lamps 60 that are mainly installed along roads through which people pass.

The distance sensor 90 has a function of measuring the distance from the person M as an object and transmitting the measurement result (distance information) to the signal control unit 72. When receiving the distance information from the distance sensor 90, the signal control unit 72 causes the control unit 40 to control the gate phase of the MERS 30 according to the distance information.

Specifically, as shown in FIG. 11, when the person M is at the position P1 outside the detection range 91, the street lamp 60 is illuminated with the brightness L1 that is 1/10 of the brightness L3 at the rated load power. To control. When the person M approaches the distance sensor 90 and reaches the position P2 in the detection range 91, the control unit 40 increases the luminance of the streetlight 60 to an intermediate luminance L2 between the luminance L1 and the luminance L3. Further, when the person M approaches the distance sensor 90 and arrives at the position P3, the control unit 40 increases the luminance of the streetlight 60 to the luminance L3 based on the rated load power.

When the person M passes the distance sensor 90 and moves away to the position P4, the control unit 40 reduces the luminance of the streetlight 60 to the luminance L2, and further the person M becomes the position P5 and out of the detection range 91. The control unit 40 reduces the luminance of the streetlight 60 to the luminance L1.

As described above, in the lighting system 200, the brightness of the street lamp 60 changes according to the distance between the distance sensor 90 and the person M, so that it is possible to realize more natural and comfortable brightness adjustment. If the distance sensor 90 and the streetlight 60 are arranged at close positions, the distance sensor 90 and the streetlight 60 become brighter as it gets closer to the streetlight 60 and darker as it gets farther away from the streetlight. can do.

Of course, the number of stages of luminance is not limited to the three stages as described in the second embodiment, and may be set to two stages or four or more stages as necessary. In addition, the change speed at the time of luminance change, that is, the inclination in the luminance change is also set as abrupt (high speed) or moderate (low speed) as necessary. The change in brightness is not a step change, but may be a change proportional to the distance between the distance sensor 90 and the person M.

On the other hand, when this lighting system 200 is applied to, for example, a highway illumination lamp installed on a highway, the object is not a person M but an automobile that passes mainly at high speed. Therefore, in this case, the luminance change speed information of the adjustment unit 74 is set so that the luminance change is performed at a relatively high speed.

The lighting system 200 is also provided with a plurality of street lamps 60 along the road, and a plurality of dimming control units 70, distance sensors (object detection means) 90, and MERS 30 are installed so as to correspond to each of them. Therefore, when changing the brightness of the streetlight 60 with respect to the automobile traveling at high speed, the plurality of streetlights 60 can be coordinated. Specifically, similarly, not only the detection range 91 of the street lamp 60 whose luminance is to be adjusted, but also the detection range 91 of the distance sensor 90 corresponding to the adjacent street lamp 60 in the lighting system 200 is used to adjust the luminance. The brightness of the streetlight 60 is adjusted by recognizing the distance from the streetlight 60 to be tried to the car. Therefore, sufficient illumination is provided without delay for a vehicle passing at high speed, and safety can be ensured. Further, by increasing the brightness of the streetlight 60 after the vehicle enters the detection range 91 corresponding to the adjacent streetlight 60, a natural brightness increase without a sense of incongruity can be obtained, and the driver of the vehicle is surprised suddenly. An increase in brightness can be avoided.

[Embodiment 3]
Subsequently, an illumination system according to Embodiment 3 of the present invention will be described.

FIG. 12 is a block configuration diagram showing a schematic configuration of the illumination system 300 according to Embodiment 3 of the present invention. The lighting system 300 can be applied to, for example, lighting lamps provided on the road surface of an expressway through which automobiles pass at high speed, side wall surfaces, bridge railings, tunnel ceilings, and wall surfaces. The illumination system 300 can divert existing highway illumination light equipment without the need to separately install highway illumination light equipment.

As shown in FIG. 12, the illumination system 300 according to the third embodiment is roughly configured by a MERS 30, an illumination lamp 65, a control unit (control means) 40, a signal control unit 72, and a speed sensor 95. The illumination lamp 65 may be a discharge lamp such as a fluorescent lamp, a mercury lamp, or a sodium lamp. A plurality of illumination lamps 65 are installed along the road, and a plurality of MERSs 30 and a control unit 40 are installed so as to correspond to each of them, and each MERS 30 is connected to each illumination lamp 65, and each MERS 30 is connected to each MERS 30. Each control unit 40 is connected to each other. That is, the illuminating lamp 65, the MERS 30, and the control unit 40 are one set. Each MERS 30 is connected to the AC power source 20. A predetermined number of groups (for example, 100 groups) of the illumination lamps 65, the MERS 30, and the control unit 40 constitute one illumination unit, and each control unit 40 of the illumination unit controls a signal control unit 72 that controls the illumination unit. , And the adjustment unit 74, respectively. The signal control unit 72 and the adjustment unit 74 are connected to each other. In addition, an induction speed adjustment unit 75 is connected to the signal control unit 72. In FIG. 12, a connection state of one control unit 40 among the plurality of control units 40 is shown.

The speed sensor 95 has a function of measuring the speed of the target vehicle V within the detection range 96 and transmitting the measurement results (vehicle presence information and speed information) to the signal control unit 72. is doing. The MERS 30 is a magnetic energy regenerative switch as described above, and each control unit 40 of the corresponding lighting unit controls the gate phase of each MERS 30 using the output from the speed sensor 95 and the information of the guide speed adjustment unit 75 as a trigger. By doing so, each illumination lamp 65 of the illumination unit is configured to become brighter or darker.

Specifically, as shown in FIG. 13, the illuminating lamp 65 of the illumination system 300 according to Embodiment 3 includes a plurality of illuminating lamps 65 belonging to a predetermined illuminating unit (part of the illuminating lamps 65a to 65h). Are provided at predetermined intervals along the road, for example, on the side walls of the road and the guard rail, so that a “light band” having a predetermined speed is formed by the brightness of the plurality of illumination lamps 65. Each illumination lamp 65 is configured to repeat light and dark periodically.

For example, as shown in FIG. 13, the illuminating lamp 65 is divided into three levels of luminance L1 based on electric power lower than the rated load electric power (for example, 1/10 electric power), luminance L3 at the rated load electric power, and luminance L2 in the middle. The brightness can be changed (that is, the brightness can be changed with four steps from time t1 to time t5 as one cycle), and the installation interval of each illumination lamp 65 (for example, the distance from the illumination lamp 65a to the illumination lamp 65b) is If it is 2.2 m, for example, in order to form an “light band” of 100 km / h (27.8 m / sec), each illumination lamp 65 is controlled as follows. As described above, the brightness of each illuminating lamp 65 is performed by the corresponding control unit 40 controlling the gate phase of the corresponding MERS 30.

As shown in FIG. 13, the illuminating lamp 65a has the luminance L1 before receiving the trigger. However, when the trigger is received at the time t1, one cycle of light-dark change (from time t1 to time t5) = 0.317 sec ( 8.8 m / 27.78 m / sec), time t1: luminance L1 to luminance L2, time t2: luminance L2 to luminance L3, time t3: luminance L3 to luminance L2, time t4: luminance L2 to luminance L1, time t5: Brightness changes again from luminance L1 to luminance L2. The illuminating lamp 65b adjacent to the traveling direction of the illuminating lamp 65a is similarly 1 cycle of brightness change = 0.317 sec, time t1: luminance L2 to luminance L1, time t2: luminance L1 to luminance L2, time t3: luminance L2 To luminance L3, time t4: The luminance changes from luminance L3 to luminance L2, and the phase is delayed from the illuminating lamp 65a by ¼ cycle of the luminance change. The same applies to the illumination lamp 65c and thereafter. Therefore, at time t1, the illumination lamp 65c and the illumination lamp 65g have the luminance L3, but at the time t2, which is a quarter cycle after the light / dark change, the illumination lamp 65d and the illumination lamp respectively advanced by one in the vehicle traveling direction. 65h is the luminance L3. In this way, each illuminating lamp 65 can form a “light band” that repeats bright and dark changes and travels at 100 km / h. The change in brightness of each illumination lamp 65 continues for a predetermined time (for example, 30 sec), and the “light band” also continues for a predetermined time.

When the power supply frequency is 50 Hz, one cycle of light / dark change can be divided into 16 parts every 20 msec, and each illumination lamp 65 can be changed light / dark, so the brightness change mode is selected as appropriate, such as four or more stages. it can. This selection is based on information from the adjustment unit 74.

FIG. 14 shows the speed of the vehicle V (Speed V) measured by the speed sensor 95 and the speed of the “light band” formed by the lighting system 300 (Speed) stored in the guidance speed adjustment unit 75 and used by the lighting system 300. L) is shown. When the speed of the automobile V is not detected (the automobile V does not exist), or when the speed of the automobile V is less than a predetermined speed V0 (for example, 50 Km / h), each of the lighting lamps 65 is lower than the rated load power. The luminance L1 based on electric power (for example, 1/10 electric power) is maintained, and no “light band” is formed. When the speed sensor 95 recognizes that the speed of the traveling vehicle V is equal to or higher than the predetermined speed V0, the illumination light 65 starts to change from light to dark as described above from time t1 in FIG. A “light band” having a predetermined induction speed Vint (for example, 100 km / h) is formed. This “light band” continues for a predetermined time. The guide speed Vint may be changed depending on the traffic situation, the regulation situation, and the weather situation on the road. Moreover, you may set so that it may change according to the speed of the detected motor vehicle V. FIG. The guide speed adjusting unit 75 transmits the guide speed Vint to the adjusting unit 74 via the signal control unit 72, and the adjusting unit 74 selects a luminance change mode according to the guide speed Vint from the stored information.

This lighting system 300 can be used on an uphill of a highway, an entrance of a tunnel, etc., where a driver loosens the accelerator and the speed of a traveling vehicle decreases and traffic is likely to occur, or conversely, a downhill, near the exit of a tunnel, etc. It is good to install in a place where it is preferable to reduce the speed of the automobile for traveling safety. In general, a driver unconsciously accelerates when the speed of an object running in parallel next to the car being driven is faster than the speed of the own vehicle, and conversely, when the speed is slower than the speed of the own vehicle, the driver decelerates. It is known that there is a psychological tendency to run at speed. Therefore, the lighting system 300 is installed at these locations, and guides the automobile traveling at each location toward travel at a desired predetermined speed by the “light band” that travels at a predetermined speed. be able to.

Although the speed sensor 95 is used in the lighting system 300 according to the third embodiment, the presence detection sensor 80 used in the lighting system 100 according to the first embodiment or the embodiment is used instead of the speed sensor 95. The distance sensor 90 used in the illumination system 200 according to 2 may be used.

The present invention is not limited to the above-described embodiment, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The form can also be included in the scope of the present invention.

Claims

An object detection means for detecting the presence / absence of the object;
A load power adjustment switch connected between the power source and the lighting,
By connecting the object detection means and the load power adjustment switch, and changing the magnitude of the output voltage and the current phase of the load power adjustment switch based on the output signal from the object detection means, A lighting system comprising: a control means for changing brightness;
An illumination system further comprising brightness change mode adjusting means for adjusting a brightness change mode of the illuminating lamp.
The load power adjustment switch includes at least two reverse conducting semiconductor switches, and a capacitor for accumulating magnetic energy of current at the time of current interruption and regenerating to the illuminating lamp, and the reverse conducting semiconductor The lighting system according to claim 1, wherein load power supplied to the illuminating lamp is adjusted by controlling a gate phase of the switch.
The illumination system according to claim 1, wherein the luminance change mode is a luminance change speed.
The lighting system according to claim 1, wherein the control means increases the luminance of the illuminating lamp when the object is present and decreases the luminance of the illuminating lamp when the object is not present.
The lighting system according to claim 1, wherein at least one of the increase or decrease in luminance is a step change.
The illumination system according to claim 1, wherein the control means changes the luminance of the illumination lamp in accordance with a distance between the object detection means and the object.
The object detection means detects the presence / absence of the object based on at least one of temperature change, presence / absence of motion, or magnetic field change in the detection region, and information transmission / reception with the object. The lighting system according to claim 1.
2. The illumination lamp according to claim 1, wherein a plurality of the illumination lamps are arranged in a substantially straight line, and the luminance of the plurality of illumination lamps is periodically changed by stepwise shifting a phase for a predetermined time when the object is present. The lighting system described.
The illumination system according to claim 8, wherein the object detection means detects the speed of the object in the detection area.
10. The illumination lamp according to claim 1, wherein the illumination lamp is an illumination lamp having an inductive load, an illumination lamp connected to the inductive load, or an illumination lamp having a resistive load. Described in the lighting system.
10. The illumination system according to claim 1, wherein the illuminating lamp having an inductive load is a discharge lamp such as a fluorescent lamp, a mercury lamp, or a sodium lamp.