CN101621873B - Intelligent driving system and energy-saving control method of street lamp based on LED array - Google Patents
Intelligent driving system and energy-saving control method of street lamp based on LED array Download PDFInfo
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Abstract
The invention discloses an intelligent driving system of a street lamp based on an LED array, comprising a bridge rectification circuit, a quasi-resonance period DC/DC conversion circuit, an LED illumination module circuit, a current/voltage detecting circuit, a photoelectric insulation circuit, a microprocessor and a microprocessor peripheral circuit. Compared with the prior art, the intelligent driving system of the street lamp based on the LED array utilizes the microprocessor to control and manage the photoelectric heat dynamic characteristic of an LED, thereby improving the working reliability of the LED and achieving the energy-saving purpose. The invention also provides an energy-saving control method of a street lamp, which enables the intelligent driving system of the LED street lamp to make adaptation and adjustment according to the luminescence characteristic change caused by the change of exterior conditions such as working temperature, and the like so as to achieve optimal illumination effect and optimize the illumination efficiency of an LED street lamp system.
Description
Technical field
The present invention relates to a kind of street lamp intelligent driving system, also proposed a kind of application simultaneously and be somebody's turn to do road lamp energy-saving control method based on the street lamp intelligent driving system of led array based on led array.
Background technology
Along with the continuous consumption of the energy, resource is deficient day by day, and greenhouse effect require energy-saving and cost-reducing cry increasingly high to the mankind's harm increasingly significant in the world, and energy savings becomes the common recognition of various countries.China is the just formal Green Lighting Project that starts as far back as 1996, and proposing illuminating engineering will economize on resources, and prevents to pollute, and brings benefit to the next generation.Through the joint efforts of all circles, as the 4th generation light source semiconductor (LED) illuminating product tremendous development has been arranged, aspect energy-conservation, obtained the achievement that attracts people's attention.
White light emitting diode (LED) is a kind of electrooptic semiconductor converted light source of high-efficiency environment friendly, has lot of advantages with respect to conventional light source, particularly in the illumination of replacement large power road lamp, receives very big attention.At present, be example with the Chongqing City, surplus the total street lamp 20 ten thousand, day power consumption surpasses 1,000,000 degree, and only the direct operating cost (electricity charge+operation and maintenance cost) of road lamp system average every day is just above 600,000 yuan.If but all adopt LED city illumination street lamp, the electricity charge of only saving every day just can reach 420,000 yuan, and the annual electricity charge are saved up to 1.5 hundred million yuan, this shows, and the annual direct economic benefit that produces of LED road lamp system is appreciable.Therefore, the LEDs street lighting has been classified as one of important energy-saving and emission-reduction measure of country's development at present.
The large power white light LED illumination has complicated drive characteristic: required operating voltage, the drive current difference of LED that (1) is different; (2) under the situation that drive current is constant, along with the increase of operating time, luminous flux decreases; (3) under the situation that drive current is constant, along with the rising luminous flux reduction of temperature.Therefore, design has the led drive circuit of adaptation function, so that suitable operating voltage, drive current to be provided, guarantees that its output intensity has relative stability, and is significant.Existing white light LEDs street lamp Driving technique mainly comprises resistance-capacitance depressurization and PWM switch constant voltage and constant-current driving; When the accumulation of heat that when the external environment condition of complicacies such as temperature, humidity and work, produces causes the LED parameter change; Simple steady flow measure based on traditional resistance-capacitance depressurization and PWM switch constant pressure and flow can not be made in good time adjustment with the change of LED parameter; Cause driving inefficiency, problems such as current-sharing instability.
Simultaneously, the application demand of the controllable characteristics that quantizes of led light source also improves day by day, and traditional LED driven strategy works has restricted LED application in this respect greatly.
Summary of the invention
In view of this, the invention provides a kind of street lamp intelligent driving system based on led array.This system comprises that microprocessor controller, quasi-resonance stride cycle topological structure, photoelectric heat detection of dynamic and multi-way intelligence output; Realize the constant-current driving of LED, have that numerical value is controlled, high efficiency, adaptive constant-flow adjusting and wide range input voltage, an over-voltage protecting function.Simultaneously, adopt slow the startup, junction temperature, outside light intensity, the information gathering of traffic statistics amount and parameter matching rules, the light decay compensation realizes the Energy Saving Control of street lamp.
One of the object of the invention has been to propose a kind of street lamp intelligent driving system based on led array; This system comprises that bridge rectifier, quasi-resonance stride cycle DC/DC translation circuit, LED lighting module circuit, current/voltage testing circuit, photoelectric isolating circuit, microprocessor and peripheral circuit thereof; The civil power of input is after the bridge rectifier rectification; Stride cycle DC/DC translation circuit through quasi-resonance and realize multichannel output; Said quasi-resonance is striden cycle DC/DC translation circuit and is connected with microprocessor through feedback circuit, and said current/voltage testing circuit is connected on the output that quasi-resonance is striden cycle DC/DC translation circuit, and the detected coherent signal of current/voltage testing circuit is sent into microprocessor through photoelectric isolating circuit and handled; Be used to control quasi-resonance and stride cycle DC/DC translation circuit, realize that output is stable; Said LED lighting module circuit is at least two-way and links to each other with the corresponding control port of microprocessor respectively; The working temperature of said ambient light detection circuit and junction temperature testing circuit testing environment light intensity and led module; And send into microprocessor processes to testing result, be used to realize the intelligent power saving control of LED lighting module.
Further; Said LED lighting module circuit comprises LED, metal-oxide-semiconductor, diode, triode, collector resistance, base resistance, resistance and source resistance, the direct ground connection of the emitter of said triode, and its collector electrode connects the accessory power supply input through collector resistance; The base stage of said triode is connected with the corresponding control port of microprocessor through base resistance; The grid of said metal-oxide-semiconductor is connected through the collector electrode of resistance and triode, and the source electrode of said metal-oxide-semiconductor is through source resistance ground connection, and the positive pole of said LED connects the main power source input; The negative pole of said LED is connected with the drain electrode of metal-oxide-semiconductor, constitutes the PWM drive circuit of LED;
Further; Said drive circuit also comprises the source of stable pressure low-voltage output circuit; Said source of stable pressure low-voltage output circuit comprises pressurizer, capacitor C 1, C2, C3 and C4, and the input of said pressurizer is striden cycle DC/DC translation circuit low-voltage output with quasi-resonance and is connected, and said C1, C2 are connected in parallel between the input and ground of pressurizer; Said C3, C4 are connected in parallel between the output and ground of pressurizer, and said pressurizer provides+working power of 5V to single-chip microcomputer and peripheral circuit chip thereof;
Further, said microprocessor is single-chip microcomputer STC2051ad, and said LED lighting module circuit is four the tunnel, inserts P1.4～P1.7 pin of single-chip microcomputer STC2051ad respectively, and said P1.4～P1.7 pin is the PWM control input end mouth of LED lighting module circuit;
Further; The P3.7 pin of said single-chip microcomputer STC2051ad is connected with light-emitting diode D5; The negative pole of said light-emitting diode D5 is connected with the P3.7 pin, anodal connects+working power of 5V through resistance R 1, and said light-emitting diode is used to indicate the operating state of led module;
Further; Said junction temperature testing circuit comprises thermistor R3, resistance R 10, binding post J6; Said thermistor R3 one end connects+working power of 5V through binding post; The other end is sent into detected signal the P1.0 pin of single-chip microcomputer STC2051ad simultaneously through binding post, resistance R 10 ground connection, realizes that the LED working temperature detects in real time;
Further; Said ambient light detection circuit comprises light intensity detection chip APD9003, resistance R 11; The working power of VCC termination+5V of said light intensity detection chip APD9003; The OUT of said light intensity detection chip APD9003 holds the P1.1 pin of also sending into detected signal single-chip microcomputer STC2051ad through resistance R 11 ground connection, realizes that ambient light intensity detects;
Further, said SCM peripheral circuit comprises clock circuit, clock-pulse circuit and infrared communication circuit, RS232 serial communication circuit;
Said clock circuit comprises real-time timepiece chip DS1302S, crystal oscillator Y1 and stand-by power supply; The SCLK pin of said real-time timepiece chip DS1302S, I/O pin, RST pin are connected with INT1 pin, T0 pin and the T1 pin of single-chip microcomputer STC2051ad respectively; The X1 of said real-time timepiece chip DS1302S and X2 pin are connected the two ends of crystal oscillator Y1, the V of said clock chip DS1302S respectively
CC2Pin connects+working power of 5V, and the V of said clock chip DS1302S
CC1Pin connects the 3.6V stand-by power supply, and said clock circuit provides definite time signal for the led module Energy Saving Control;
Said clock-pulse circuit comprises crystal oscillator Y2 and two electric capacity; Said crystal oscillator Y2 two ends connect an electric capacity respectively; The other end ground connection of said electric capacity, the two ends of said crystal oscillator Y2 also connect XTAL1 and the XTAL2 pin of single-chip microcomputer STC2051ad respectively, for single-chip microcomputer provides clock pulse;
Said infrared communication circuit is accomplished by infrared communication module 0388; The pin 1 of said outer communication module 0388 connects+working power of 5V; Pin 2 ground connection; Pin 3 connects the P3.2 pin of single-chip microcomputer STC2051ad, is used for through remote control, realizes the debugging of LED street lamp and restarting of emergency switch lighting circuit and microprocessor system;
Said RS232 serial communication terminal is connected between the pin P3.0 and P3.1 of single-chip microcomputer STC2051ad, realizes communicating by letter with computer by serial, accomplishes work such as program updates, download;
Further; The mode of operation of said LED lighting module can be set through resistance R 8; Said resistance R 8 one end ground connection, another termination power+5V is attempted by on the pin 1.2 of single-chip microcomputer STC2051ad, through high-low level realize LED non intelligent/conversion of intelligent work pattern.
Two of the object of the invention provides a kind of road lamp energy-saving control method, and this method realizes that through the street lamp intelligent driving system based on led array that application invention purpose one proposes the practical implementation step is following:
1) microprocessor system initialization, system determines whether to give to each paths of LEDs lighting module circuit according to external command;
2) confirm to judge whether to be in intelligent mode to behind the electricity, if non intelligent pattern, system gets into the slow starting state of start, and each road output is increased to maximum to slow the startup gradually and accomplishes, and each road output gets into step 4) under the state that keeps maximum power output; If intelligent mode; System gets into the slow starting state of start, through ambient light detection circuit, obtains external environment condition light intensity value; In conjunction with being worth; In setting-up time, give electricity, be linear change, be worth corresponding numerical value until reaching to electric strength with the external environment condition light intensity to electric strength to each paths of LEDs lighting module circuit;
3) start slow start accomplish after, constantly detect the external environment condition light intensity, reach the threshold values of setting when the external environment condition light intensity after, system gets into the total power output state;
4) at the total power output state, system detects LED lighting source temperature, according to different light-source temperature, system select automatically between 0.6～1 times total power output multiple;
5) reduce gradually through (time system by system self is confirmed) volume of traffic behind the certain hour, take lamp holder alternation pattern, according to the split-second precision system, every separated Fixed Time Interval led module carries out constant intensity and replaces conversion work;
6) reach the setting unused time, contrary start process is carried out in each road output, and system finishing is given to LED lighting module circuit.
The invention has the beneficial effects as follows:
Compared with prior art; What the present invention proposed has adopted the photoelectric heat dynamic characteristic of microprocessor control and management LED based on monolithic processor controlled led array street lamp intelligent driving system; Improve the functional reliability of LED, realized the further energy-conservation of LED street lighting simultaneously;
The road lamp energy-saving method that the present invention proposes adopts slow startup, junction temperature, outside light intensity, the information gathering of traffic statistics amount and parameter matching rules and light decay compensatory approach; Not only realize the Energy Saving Control of street lamp, and greatly improved the functional reliability of LED street lamp; And made full use of the numerical value controllable characteristics of LED; Embody the adaptivity of LED street lamp illumination system; Be directed against external conditions variations such as environmental light intensity, working temperature when making in fact and make accommodation; Thereby reach best illuminating effect, and practiced thrift the energy, optimized the illumination efficiency of LED road lamp system.
Other advantages of the present invention, target; To in specification subsequently, set forth to a certain extent with characteristic; And to a certain extent,, perhaps can from practice of the present invention, obtain instruction based on being conspicuous to those skilled in the art to investigating of hereinafter.Target of the present invention and other advantages can realize and obtain through following specification and claims.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:
Fig. 1 is the structured flowchart of the street lamp intelligent driving system based on led array of the present invention;
Fig. 2 is the circuit diagram of the street lamp intelligent driving system based on led array of the present invention;
Fig. 3 is the circuit connection diagram of source of stable pressure low-voltage output circuit;
Fig. 4 is a road lamp energy-saving control method FB(flow block) of the present invention.
Embodiment
Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.Should be appreciated that preferred embodiment has been merely explanation the present invention, rather than in order to limit protection scope of the present invention.
Like Fig. 1, shown in Figure 2; Street lamp intelligent driving system based on led array of the present invention; Comprise and bridge rectifier, quasi-resonance stride cycle DC/DC translation circuit, current/voltage testing circuit, photoelectric isolating circuit, LED lighting module circuit, microprocessor and microprocessor peripheral circuit (it is universal circuit that said bridge rectifier, quasi-resonance are striden cycle DC/DC translation circuit, current/voltage testing circuit, photoelectric isolating circuit; In the circuit diagram of Fig. 2, do not mark), the input civil power after the bridge rectifier rectification; Stride cycle DC/DC translation circuit through quasi-resonance and realize multichannel output; Quasi-resonance is striden cycle DC/DC translation circuit and is connected with microprocessor through feedback circuit; The current/voltage testing circuit is connected on the output that quasi-resonance is striden cycle DC/DC translation circuit, and the detected coherent signal of current/voltage testing circuit is sent into microprocessor through photoelectric isolating circuit and handled.
In the present embodiment; 4 paths of LEDs lighting module circuit have been designed; Wherein the 1st paths of LEDs lighting module circuit comprises LED11, metal-oxide-semiconductor Q1, diode D1, triode Q5, collector resistance R4, base resistance R9, resistance R12 and source resistance R13; The positive pole of LED11 is connected with the positive limit that quasi-resonance is striden cycle DC/DC translation circuit low-voltage output; The negative pole of LED11 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the source electrode of metal-oxide-semiconductor Q1 is through source resistance R13 and ground connection after the emitter of triode Q5 is connected, and the grid of metal-oxide-semiconductor Q1 is connected with the secondary of low-voltage output with collector resistance R4 through resistance R12; The contact of resistance R12 and collector resistance R4 is connected with the collector electrode of triode Q5, and the base stage of triode Q5 is connected with the corresponding control port of microprocessor through base resistance R9.
The 2nd paths of LEDs lighting module circuit comprises LED2, metal-oxide-semiconductor Q2, diode D2, triode Q6, collector resistance R5, base resistance R14, resistance R15 and source resistance R16; The 3rd paths of LEDs lighting module circuit comprises LED3, metal-oxide-semiconductor Q3, diode D3, triode Q7, collector resistance R6, base resistance R17, resistance R18 and source resistance R19; The 4th paths of LEDs lighting module circuit comprises LED4, metal-oxide-semiconductor Q4, diode D4, triode Q8, collector resistance R7, base resistance R20, resistance R21 and source resistance R22, and the electric elements syndeton on each road is identical with the 1st paths of LEDs lighting module circuit.
In the present embodiment, microprocessor is that single-chip microcomputer is selected STC2051ad for use, and 4 paths of LEDs lighting module circuit insert P1.4～P1.7 pin of single-chip microcomputer STC2051ad respectively, and P1.4～P1.7 pin is as the PWM control input end mouth of LED lighting module circuit.
As shown in Figure 3; Drive circuit also comprises the source of stable pressure low-voltage output circuit; The source of stable pressure low-voltage output circuit comprises pressurizer, capacitor C 1, C2, C3 and C4; The input of pressurizer is connected with the secondary that quasi-resonance is striden cycle DC/DC translation circuit low-voltage output; C1, C2 are connected in parallel on the input and the quasi-resonance of pressurizer and stride between the main limit of cycle DC/DC translation circuit low-voltage output, and C3, C4 are connected in parallel on the output and the quasi-resonance of pressurizer and stride between the main limit of cycle DC/DC translation circuit low-voltage output, and the source of stable pressure low-voltage output circuit is the driving voltage that each chip of native system provides 5V.Pressurizer in the present embodiment is selected voltage stabilizing chip 78L05.
The P3.7 pin of single-chip microcomputer STC2051ad is connected with light-emitting diode D5, and the negative pole of said light-emitting diode D5 is connected with the P3.7 pin, anodal connects+working power of 5V through resistance R 1, and said light-emitting diode is used to indicate the operating state of led module.
The SCM peripheral circuit comprises clock circuit, clock-pulse circuit and infrared communication circuit, RS232 serial communication circuit;
Clock circuit comprises real-time timepiece chip DS1302S, crystal oscillator Y1 and stand-by power supply; The SCLK pin of real-time timepiece chip DS1302S, I/O pin, RST pin are connected with INT1 pin, T0 pin and the T1 pin of single-chip microcomputer STC2051ad respectively; The X1 of real-time timepiece chip DS1302S and X2 pin are connected the two ends of crystal oscillator Y1, the V of clock chip DS1302S respectively
CC2Pin connects+working power of 5V, and the V of clock chip DS1302S
CC1Pin connects the 3.6V stand-by power supply, and clock circuit provides definite time signal for the led module Energy Saving Control;
Clock-pulse circuit comprises crystal oscillator Y2 and two electric capacity, and crystal oscillator Y2 two ends connect an electric capacity respectively, the other end ground connection of electric capacity, and the two ends of crystal oscillator Y2 also connect XTAL1 and the XTAL2 pin of single-chip microcomputer STC2051ad respectively, for single-chip microcomputer provides clock pulse;
The infrared communication circuit is accomplished by infrared communication module 0388; The pin 1 of outer communication module 0388 connects+working power of 5V; Pin 2 ground connection; Pin 3 connects the P3.2 pin of single-chip microcomputer STC2051ad, is used for through remote control, realizes the debugging of LED street lamp and restarting of emergency switch lighting circuit and microprocessor system;
RS232 serial communication terminal is connected between the pin P3.0 and P3.1 of single-chip microcomputer STC2051ad, realizes communicating by letter with computer by serial, accomplishes work such as program updates, download;
The mode of operation of LED lighting module can be set through resistance R 8, resistance R 8 one end ground connection, another termination power+5V is attempted by on the pin 1.2 of single-chip microcomputer STC2051ad, through high-low level realize LED non intelligent/conversion of intelligent work pattern.
The junction temperature testing circuit comprises thermistor R3, resistance R 10, binding post J6; Thermistor R3 one end connects+working power of 5V through binding post; The other end is through binding post, resistance R 10 ground connection; Send into detected signal the P1.0 pin of single-chip microcomputer STC2051ad simultaneously, realize that the LED working temperature detects in real time.
Ambient light detection circuit comprises light intensity detection chip APD9003, resistance R 11; The working power of VCC termination+5V of light intensity detection chip APD9003; The OUT of light intensity detection chip APD9003 holds the P1.1 pin of also sending into detected signal single-chip microcomputer STC2051ad through resistance R 11 ground connection, realizes that ambient light intensity detects.
Analysis according to the LED drive characteristic is visible, required operating voltage, the drive current difference of LED that (1) is different; (2) under the situation that drive current is constant, along with the increase of operating time, luminous flux decreases; (3) under the situation that drive current is constant, along with the rising luminous flux reduction of temperature.And LED must guarantee that as general lighting its output intensity has relative stability to time and temperature.Therefore; Street lamp intelligent driving system of the present invention has the led drive circuit of adaptation function through employing; To LED street lamp array suitable operating voltage, drive current is provided; And make its bright dipping characteristic variations that variation causes to external conditions such as working temperatures make the adaptation adjustment, thereby reach best illuminating effect.
As shown in Figure 4, according to intelligent road-lamp drive system of the present invention, the invention allows for a kind of road lamp energy-saving control method, may further comprise the steps:
1) microprocessor system initialization, system determines whether to give to each paths of LEDs lighting module circuit according to external command;
2) confirm to judge whether to be in intelligent mode to behind the electricity, if non intelligent pattern, system gets into the slow starting state of start, and each road output is increased to maximum to slow the startup gradually and accomplishes, and each road output gets into step 4) under the state that keeps maximum power output; If intelligent mode; System gets into the slow starting state of start, through ambient light detection circuit, obtains external environment condition light intensity value; In conjunction with being worth; In setting-up time, give electricity, be linear change, be worth corresponding numerical value until reaching to electric strength with the external environment condition light intensity to electric strength to each paths of LEDs lighting module circuit;
3) start slow start accomplish after, constantly detect the external environment condition light intensity, reach the threshold values of setting when the external environment condition light intensity after, system gets into the total power output state;
4) at the total power output state, system detects LED lighting source temperature, according to different light-source temperature, system select automatically between 0.6～1 times total power output multiple;
5) through after the total power output state of setting-up time; Timer time system by system self; Every at a distance from the set time, realize the constant intensity conversion, promptly when the illumination light intensity of partial L ED lighting module circuit increases gradually; The illumination light intensity of remainder reduces synchronously, and this kind conversion hockets between two groups of LED lighting module circuit;
6) through after two groups of LED lighting module circuit alternation of setting-up time, contrary start process is carried out in each road output, and system finishing is given to LED lighting module circuit.
Energy-saving control method of the present invention has following characteristics:
1. have intelligence and non intelligent two kinds of mode of operations.Realize non intelligent pattern through resistance R 8=0 is set, be defaulted as intelligent mode;
2. formulate and solidify start and delay startup.After the energized, under the non intelligent operating state, in setting-up time (customization), each road output intensity is increased to maximum output valve gradually from 0; Under the intelligent work state, the outside light intensity when obtaining start through the high performance environments optical detection circuit, the combining environmental light intensity, each road output is increased to suitable output valve from 0 gradually in customized time;
3. total power output state.Under non intelligent operating state, after the slow startup of start was accomplished, each road output remained on maximum power output; Under the intelligent work state; After detected outside light intensity was reduced to set point, system got into maximum power output, detects the led light source temperature simultaneously; If working temperature surpasses 45 degree (customizable); Then 0.9 times of (customizable) total power output, if surpass 50 degree (customizable), then 0.8 times of (customizable) total power output;
4. lamp holder alternation.In the low time period of the volume of traffic, take lamp holder alternation pattern, according to the split-second precision system, every at a distance from alternately conversion of Fixed Time Interval.In transfer process, adopt the constant intensity conversion regime, that is: when wherein two paths of LED output increased gradually, two-way reduced synchronously in addition.
Road lamp energy-saving method of the present invention demonstrates fully the adaptivity of LED street lamp illumination system; Fully take into account external conditions such as exterior light photograph, working temperature and change caused bright dipping characteristic variations; Through adopting " the slow startup ", " magnitude of traffic flow timing statistics " and " based on the intermodule alternative method of constant illumination "; Can make street lamp reach the best effect of utilizing, and practice thrift the energy, optimize the illumination efficiency of LED road lamp system.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. based on the road lamp energy-saving control method of the street lamp intelligent driving system of led array; Said street lamp intelligent driving system based on led array; Comprise that bridge rectifier, quasi-resonance stride cycle DC/DC translation circuit, LED lighting module circuit, current/voltage testing circuit, photoelectric isolating circuit, microprocessor and peripheral circuit thereof; The civil power of input is after the bridge rectifier rectification; Stride cycle DC/DC translation circuit through quasi-resonance and realize multichannel output; Said quasi-resonance is striden cycle DC/DC translation circuit and is connected with microprocessor through feedback circuit; The current/voltage testing circuit is connected on the output that quasi-resonance is striden cycle DC/DC translation circuit, and the detected coherent signal of current/voltage testing circuit is sent into microprocessor through photoelectric isolating circuit and handled, and said LED lighting module circuit is at least two-way and is connected with the corresponding control port of microprocessor respectively;
Said drive system also comprises ambient light detection circuit and junction temperature testing circuit, and said ambient light detection circuit is connected with microprocessor with the junction temperature testing circuit;
It is characterized in that: may further comprise the steps:
1) microprocessor system initialization, system determines whether to give to each paths of LEDs lighting module circuit according to external command;
2) confirm to judge whether to be in intelligent mode to behind the electricity, if non intelligent pattern, system gets into the slow starting state of start, and each road output is increased to maximum to slow the startup gradually and accomplishes, and each road output gets into step 4) under the state that keeps maximum power output; If intelligent mode; System gets into the slow starting state of start, through ambient light detection circuit, obtains external environment condition light intensity value; In conjunction with being worth; In setting-up time, give electricity, be linear change, be worth corresponding numerical value until reaching to electric strength with the external environment condition light intensity to electric strength to each paths of LEDs lighting module circuit;
3) after the slow startup of start is accomplished, constantly detect the external environment condition light intensity, after the external environment condition light intensity reached preset threshold, system got into the total power output state;
4) at the total power output state, system detects LED lighting source temperature, and according to different light-source temperature, system selects the total power output multiple between 0.6～1 times automatically;
5) through after the total power output state of setting-up time; Timer time system by system self; Every at a distance from the set time, realize the constant intensity conversion, promptly when the illumination light intensity of partial L ED lighting module circuit increases gradually; The illumination light intensity of remainder reduces synchronously, and this conversion hockets between two groups of LED lighting module circuit;
6) through after two groups of LED lighting module circuit alternation of setting-up time, contrary start process is carried out in each road output, and system finishing is given to LED lighting module circuit.
2. be used to realize the street lamp intelligent driving system based on led array of the said method of claim 1; It is characterized in that: said microprocessor is single-chip microcomputer STC2051ad; Said LED lighting module circuit is four the tunnel; Insert P1.4～P1.7 pin of single-chip microcomputer STC2051ad respectively, said P1.4～P1.7 pin is the PWM control input end mouth of LED lighting module circuit.
3. the street lamp intelligent driving system based on led array as claimed in claim 2; It is characterized in that: said LED lighting module circuit comprises LED, metal-oxide-semiconductor, diode, triode, collector resistance, base resistance, resistance and source resistance; The direct ground connection of the emitter of said triode; Its collector electrode connects the accessory power supply input through collector resistance; The base stage of said triode is connected with the corresponding control port of microprocessor through base resistance, and the grid of said metal-oxide-semiconductor is connected through the collector electrode of resistance and triode, and the source electrode of said metal-oxide-semiconductor is through source resistance ground connection; The positive pole of said LED connects the main power source input, and the negative pole of said LED is connected with the drain electrode of metal-oxide-semiconductor.
4. the street lamp intelligent driving system based on led array according to claim 3; It is characterized in that: said drive system also comprises the source of stable pressure low-voltage output circuit; Said source of stable pressure low-voltage output circuit comprises pressurizer, capacitor C 1, C2, C3 and C4; The input of said pressurizer is striden cycle DC/DC translation circuit low-voltage output with quasi-resonance and is connected; Said C1, C2 are connected in parallel between the input and ground of pressurizer, and said C3, C4 are connected in parallel between the output and ground of pressurizer, and said pressurizer provides+working power of 5V to each chip of native system.
5. the street lamp intelligent driving system based on led array according to claim 4; It is characterized in that: the P3.7 pin of said single-chip microcomputer STC2051ad is connected with light-emitting diode D5; The negative pole of said light-emitting diode D5 is connected with the P3.7 pin; Anodal through resistance R 1 ground connection, be used for the operating state of indication LED lighting module.
6. the street lamp intelligent driving system based on led array according to claim 5; It is characterized in that: said junction temperature testing circuit comprises thermistor R3, resistance R 10, binding post J6; Said thermistor R3 one end connects+working power of 5V through binding post; The other end through resistance R 10 ground connection, is sent into detected signal the P1.0 pin of single-chip microcomputer STC2051ad through binding post J6 simultaneously, realizes that the LED working temperature detects in real time.
7. the street lamp intelligent driving system based on led array according to claim 6; It is characterized in that: said ambient light detection circuit comprises light intensity detection chip APD9003, resistance R 11; The working power of VCC termination+5V of said light intensity detection chip APD9003; The OUT of said light intensity detection chip APD9003 holds the P1.1 pin of also sending into detected signal single-chip microcomputer STC2051ad through resistance R 11 ground connection, realizes that ambient light intensity detects.
8. the street lamp intelligent driving system based on led array according to claim 7 is characterized in that: said SCM peripheral circuit comprises clock circuit, clock-pulse circuit and infrared communication circuit, RS232 serial communication circuit;
Said clock circuit comprises real-time timepiece chip DS1302S, crystal oscillator Y1 and stand-by power supply; The SCLK pin of said real-time timepiece chip DS1302S, I/O pin, RST pin are connected with INT1 pin, T0 pin and the T1 pin of single-chip microcomputer STC2051ad respectively; The X1 of said real-time timepiece chip DS1302S and X2 pin are connected the two ends of crystal oscillator Y1, the V of said clock chip DS1302S respectively
CC2Pin connects+working power of 5V, and the V of said clock chip DS1302S
CC1Pin connects the 3.6V stand-by power supply, and said clock circuit is that LED lighting module Energy Saving Control provides definite time signal;
Said clock-pulse circuit comprises crystal oscillator Y2 and two electric capacity; Said crystal oscillator Y2 two ends connect an electric capacity respectively; The other end ground connection of said electric capacity, the two ends of said crystal oscillator Y2 also connect XTAL1 and the XTAL2 pin of single-chip microcomputer STC2051ad respectively, for single-chip microcomputer provides clock pulse;
Said infrared communication circuit comprises infrared communication module 0388; The pin 1 of said outer communication module 0388 connects+operating voltage of 5V; Pin 2 ground connection, pin 3 connect the P3.2 pin of single-chip microcomputer STC2051ad, realize through the remote control of outside road lamp system being controlled; Said RS232 serial communication terminal is connected between the pin P3.0 and P3.1 of single-chip microcomputer STC2051ad, realizes communicating by letter with computer by serial.
9. the street lamp intelligent driving system based on led array according to claim 8; It is characterized in that: the mode of operation of said LED lighting module is set through resistance R 8; Said resistance R 8 one end ground connection; The working power of pin P1.2 that the other end is connected to single-chip microcomputer STC2051ad and+5V, through high-low level realize LED non intelligent/conversion of intelligent work pattern.
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| CN200910104441A CN101621873B (en) | 2009-07-24 | 2009-07-24 | Intelligent driving system and energy-saving control method of street lamp based on LED array |
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| CN200910104441A CN101621873B (en) | 2009-07-24 | 2009-07-24 | Intelligent driving system and energy-saving control method of street lamp based on LED array |
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