DE102010037944A1 - Method for contactless transmission of electrical energy and/or electric signal between wall and wing of door of e.g. house, involves producing interference signal during unloading or non detection of preset part of expected control signals - Google Patents

Abstract

The method involves providing coils (19, 20) fastened to a wall and a wing, respectively. The coils are found in inductive active connection. One of the coils (19) is loaded with a control signal, and a signal induced in the other coil (20) is detected in a preset time interval. The latter coil is loaded with a response control signal, and another signal induced in the former coil is detected in the time interval by primary and secondary electronics (38, 39). An interference signal is produced during unloading or non detection of a preset part of expected control signals. An independent claim is also included for a device for contactless transmission of electrical energy and/or electric signals between a wall and a wing fastened to the wall. The primary and secondary electronics include a housing made of heat conductive plastic.

Description

In particular, wings of doors for objects such as houses, shops or production halls increasingly have the safety or comfort improving facilities, the current state of operation and their operation is monitored or operated by located outside the door monitoring or actuation devices and which operating state changes or possibly send signals received from sensors to the monitoring or actuation devices.

By way of example, a burglar alarm panel installed in a building may be mentioned here, which communicates with devices provided on the door, for example for opening, breakthrough, lock, sabotage or motor lock monitoring.

For the transmission of appropriate signals and electrical lines between the monitoring device and the devices located on the door find in the prior art multi-core cables use that are flexibly installed between the wing and the frame and often surrounded for protection by a flexible metal hose.

These cable transitions significantly affect the visual appearance and can be pinched when closing the sash, which can damage or even destroy the cables. In addition, the cable transitions are weak points with regard to possible manipulations, which is why so-called Z-wiring of sensors or contacts is also realized in the cable transition for sabotage protection.

From the DE 10 2004 017 341 A1 is a band with a built-in transformer for contactless energy transfer known. This band comprises a primary coil arranged in a frame band part and a secondary coil arranged in a leaf band part. The magnetic coupling of the secondary coil to the primary coil, which are spaced apart in the direction of the hinge axis, serves a coil passing through both iron core, which also forms the hinge pin.

Although in principle a contactless transmission of electrical energy and / or electrical signals between a wall and attached to this wall wings with this arrangement is possible, a continuous formation of this Z-wiring is not possible in this inductive energy and / or signal transmission, under which sabotage protection suffers.

The invention is based on the object with respect to the sabotage protection improved method and provided for carrying out this method device for contactless transmission of electrical energy and / or electrical signals between a wall and a wall attached to this wing, in which one on the wall attached first coil and a wing attached to the second coil are provided, which are in inductive operative connection to create.

This object is achieved by the method set forth in claim 1 and by the device reproduced in claim 16.

In the method according to the invention, at least one first control signal is applied to the first coil in a specific time interval, and the at least one first signal induced in the second coil is detected. Furthermore, in this time interval, the second coil is acted upon by at least one second control signal and the at least one second signal induced in the first coil is likewise detected. If, in this bidirectional signal transmission, a coil is not acted upon by at least part of the expected control signals or if at least some of the expected signals due to the control signals are detected in the coils, a fault signal is generated. If this is transmitted, for example, a burglar alarm panel to trigger an alarm, so the sabotage protection is significantly improved by the inventive method. However, the fault signal can also be supplied to a so-called "watchdog" so as to avoid false alarm triggering when a technical fault occurs.

Experiments have shown that the bi-directional transmission and detection of the control signals and the induced signals in individual cases can lead to signal interference. In order to avoid that such a disturbance in each case leads to an alarm triggering, in a preferred embodiment of the method according to the invention within the time interval, the first and the second coil are each subjected to two control signals. The perturbation signal is generated only when non-applied or not detected by both control signals or both induced second signals. In other words, a perturbation signal is not triggered until two consecutive control signal cycles. identified as defective.

In a particularly preferred embodiment of a method according to the invention, the first or the second coil after generation of the induced signal with a response control signal applied, which in turn generates an induced signal in the other coil.

The time interval in which correlated signals are generated or detected is preferably between 100 ms and 500 ms, particularly preferably about 200 ms.

A control signal and an associated response control signal are preferably generated within a period of 20 ms to 100 ms, particularly preferably of about 40 ms.

In principle, the control signal can be of any type that allows a signal to be generated in the other coil in an inductive manner. However, it is particularly preferred if the control signal - particularly preferably the response control signal - is generated by modulation of a carrier voltage. In principle, all methods known for modulating signals come into consideration. However, it is particularly preferred if, for bidirectional transmission, the carrier voltage is amplitude-modulated by the control signal or the response control signal.

The carrier voltage preferably has a carrier frequency of at least 20 kHz, more preferably between about 80 kHz and 200 kHz. Most preferably, the carrier frequency is about 100 kHz.

Although the method described above increases protection against sabotage already considerably. In order to increase the protection against expensive sabotage, for example, include an inductive coupling a sabotage coil to the first coil instead of the second coil provided on the wing, a development of the method according to the invention, the query of the value of a wing side arranged control resistor within the time interval before. As a result, a further sabotage obstacle is created because with an inductive coupling for the purpose of decoupling the wing-side coil and the resistance value known and the corresponding signal would have to be generated.

The sample value of the control resistor can be transmitted to the first coil by modulation of the voltage applied to the second coil carrier voltage and then compared with a desired value. A second fault signal can then be used, for example, to trigger an alarm if the determined value exceeds a certain, still permissible difference amount from a reference value. Experiments have shown that to reduce the risk of false alarms, the difference of about 40% of the resistance value is well suited as a threshold value.

In order to considerably hinder sabotage even in the event that the person planning the sabotage action is also aware of the resistance value, the first and second coils are preferably subjected to at least encrypted control signals and response control signals.

The possibility of decryption by unauthorized persons is again made more difficult if - as is particularly preferred - the control signal and the response control signal are encrypted with the aid of a switching code.

To further increase security against sabotage, the inventive method may include the step of mutual authentication of a primary electronics electrically connected to the first coil and a secondary electronics connected to the second coil.

The device according to the invention for carrying out the above-described method according to the invention comprises a provided on a wall first coil, provided on a wing second coil, wherein the first and second coils are in inductive operative connection, connected to the first coil primary electronics and one with the second coil connected secondary electronics, wherein the primary and the secondary electronics comprise means for generating and detecting control signals and response control signals.

Preferably, the primary and the secondary electronics comprise means for modulating a carrier voltage with the control signals, in a bidirectional data transmission preferably an amplitude modulator.

In addition, preferably means for authenticating the primary and secondary electronics are provided.

Thus, the primary and the secondary electronics are not accessible without destruction with the wing closed, the primary and the secondary electronics each comprise a housing which, for installation in a frame profile or in a wing profile, in particular in profile recesses on the sides with the wing closed, suitable is.

On the one hand to avoid interference of the primary or secondary electronics by external electric magnetic fields, on the other hand to prevent leakage of electromagnetic radiation from the housings, these are preferably formed shielded.

In order to prevent overheating of the electronic components provided in the housings, which themselves regularly develop a certain amount of heat, the housings are preferably made of a heat-conducting material, more preferably made of a heat-conducting plastic material because of the simplification of the production.

Further, the primary and secondary electronics preferably include modems for 8-bit encoding and decoding of signals and control signals to be transmitted. With the aid of these modems, analog signals transmitted by, for example, devices and sensors provided on the wing can be modulated and transmitted insensitive to interference. The primary and secondary electronics can furthermore each comprise a BUS system, to each of which several sensors can be connected. The transmission of measured values or operating states provided by means of the sensors can then be carried out serially after modulation and demodulation, for example using protocols which, for example, the RS 485 standard can be made.

The invention will be explained below with reference to the embodiment shown in the drawing. Show it:

1 - Schematically - a device according to the invention in a partially torn view of the band and wing parts in a perspective view, with schematically indicated primary and secondary electronics;

2 - again schematically - the arrangement according to 1 in on a frame and a wing profile, which is hingedly connected to a hinge axis with the frame, attached state and

3 a block diagram of this device.

The in the drawing as a whole with 100 designated device is optically simulated a so-called three-piece band. You can - depending on your needs - at the same time carry supporting hinge function and thus replace a conventional tape. Or it merely serves for the non-contact transmission of electrical energy and / or electrical signals and is provided in addition to conventional bands on a wing / band assembly.

The device 100 includes a band part 1 which is fixing to a fixed frame R. It has two hinge parts 2 . 2 ' on, in the longitudinal direction of a hinge axis S to a distance space 3 spaced apart from each other.

Between the upper hinge part 2 and the lower hinge part 2 ' is in the distance space 3 the hinge part 4 a wing part 5 arranged, which is mounted on a sash F in the embodiment shown in the drawing. For attachment includes the band part 1 Tape Fasteners 6 . 6 ' , the wing part 5 a wing attachment part 7 ,

The hinge axis S is defined by one of the hinge parts 2 . 2 ' and 4 enforcing hinge pin 8th who passes through the hinge parts in hinge pin receptacles, which are not shown in the drawing for the sake of clarity, in a known manner.

In the upper hinge part 2 of the band part 1 is a first electrical coil 19 provided by a coil spring 18 with one according to 1 downwardly acting spring force is applied. The sink 18 is by means of a two-wire, electrical line 17 with a primary electronics 38 connected.

In the hinge part 4 of the wing part 5 is a second electrical coil 20 used, which by means of a coil spring 21 with one according to 1 upwardly directed spring force is applied. The first and second coils are under the action of the coil springs 18 . 21 to each other.

The second coil 20 is via a three-wire electrical line 22 with a secondary electronics 39 connected.

The primary electronics 38 has an entrance 40 on which is the connection to a power source 41 serves. This can be - as in 3 recognizable - to an emergency power buffered output of a power supply 42 a burglar alarm center 43 act. It provides a DC supply voltage of 12V. The primary electronics 38 includes an inverter, which converts the DC input voltage into one for acting on the first coil 19 suitable AC voltage, for example, 12 V effective and a carrier frequency of 100 kHz converts.

Furthermore, the primary electronics 38 connections 44 on, for example, signals from opening, breakthrough, shutter and sabotage monitoring and control signals are applied, for example, to the latch operation. These control signals are provided by the primary electronics by means of a BUS system using, for example, protocols which are the RS 485 standard correspond, converted into serial records.

Furthermore, the primary electronics comprises a modulator, by means of which the carrier frequency is modulated by the data sets to be transmitted. The modulated carrier voltage is at an output 45 on and is over the electrical line 17 the first coil 19 fed.

In the second coil 20 a secondary voltage is induced and over the line 22 a connection 46 the secondary electronics 39 fed. It comprises a demodulator which demodulates the secondary voltage modulated by the signals and transmits the signals to sensors, for example, for opening, breakthrough, closure or sabotage monitoring, for example, for status inquiry.

The secondary electronics 39 is with a power source 47 connected, in turn, for example, a 12 V DC at an input 48 provides. The secondary electronics 39 in turn, includes an inverter that converts this input voltage into a 12V AC voltage with a frequency of 100kHz. The power supply can also take place via a power voltage inductively generated in the secondary coil.

Further, the secondary electronics in turn comprises a modulator, which of the sensors of the aforementioned monitoring devices via terminals 49 provided signals in serial signal packets in those of the primary electronics 38 corresponding way converted. The thus modulated carrier voltage is transmitted via the line 22 to the second coil 20 created. The result in the first coil 19 induced AC voltage is transmitted via the line 17 fed to the primary electronics and demodulated in this and connections 44 fed to the burglar alarm panel.

The thus created bidirectional data transmission takes place with an 8-bit resolution and a transmission rate of 9600 baud.

To increase the sabotage protection is provided by the primary electronics 38 in a time interval of 40 ms a control signal packet over the lines 17 and 22 as well as the first and second coils 19 and 20 the secondary electronics 39 transmitted. This acknowledges receipt of the control signal packet by return transmission of a response control signal packet to the primary electronics 38 in this time interval. Furthermore, another transmission cycle of control and response control signals takes place in this time interval. Receives the primary electronics 38 within this time interval not at least one response control signal, so will an output 49 the primary electronics 38 generates an interference signal which can be used to trigger a fault or alarm.

In order to further increase the sabotage protection, a control resistor is provided on the wing side, whose resistance value from the secondary electronics 39 queried and after appropriate modulation of the primary electronics 38 is transmitted in this time interval. Here, the transmitted resistance value is compared with a set value corresponding to the actual vane-side resistance value. If the measured value differs by at least 40% from the nominal value, this is interpreted as an indication of a sabotage attempt and at the output 49 generates a corresponding signal.

The control and response control signal packets, as well as the transmitted resistance, are encoded to further enhance security by means of a switch code, which is received by the receiving primary electronics 38 or secondary electronics 39 can be decrypted.

The primary electronics 38 and the secondary electronics 39 are in mechanically resistant, well thermally conductive and shielded against electromagnetic radiation housings 50 . 51 housed only in 2 are shown schematically.

The housing 50 the primary electronics 38 is in a wall-side frame profile, the housing 51 the secondary electronics 39 built into a sash profile. The installation takes place - like 2 can be removed - from the profile sides, which are facing each other with the wing closed. By this measure, the housing 50 . 51 not visible from the outside and can be protected against tampering by a sabotage contact, which generates a fault signal during a removal attempt.

In order to further increase the sabotage security, however, the primary electronics and the secondary electronics are provided with means for mutual authentication, so that an unnoticed exchange of primary or secondary electronics by a previously manipulated electronics is at least substantially more difficult.

LIST OF REFERENCE NUMBERS

100

contraption

1

band part

2, 2 '

hinge parts

3

distance space

4

hinge part

5

wing part

6, 6 '

Wall Fasteners

7

Wing attachment part

8th

hinge bolts

17

electrical line

18

coil spring

19

first coil

20

second coil

21

coil spring

22

electrical line

38

primary electronics

39

secondary electronics

40

entrance

41

Power source

42

power adapter

43

Intrusion Control Panel

44

connections

45

connection

46

connection

47

Power source

48

entrance

49

connections

50

casing

51

casing

F

casement

R

frame

S

hinge axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004017341 A1 [0005]

Cited non-patent literature

• RS 485 standard [0027]
• RS 485 standard [0040]

Claims (24)

Method for the non-contact transmission of electrical energy and / or electrical signals between a wall and a wing fixed to this wall, in which a wall-mounted first coil and a second coil attached to the wing are provided, which are in inductive active connection, characterized in that in a certain time interval the first coil ( 19 ) is applied to at least one first control signal and the at least one in the second coil ( 20 ) is detected, that in this time interval the second coil ( 20 ) is applied with at least one response control signal and the at least one signal induced in the first coil is detected, and that in the event of non-application or non-detection of the or a predetermined portion of expected control signals or signals, a first disturbance signal is generated. A method according to claim 1, characterized in that within the time interval, the first and the second coil are each acted upon with two control and response control signals and the interference signal is generated when not applied or not detected by two control signals or two response control signals. A method according to claim 1 or 2, characterized in that after applying the first or the second coil with an initial control signal, a response control signal is generated to an induced signal. Method according to one of claims 1 to 3, characterized in that the second interval between 100 ms and 500 ms, preferably about 200 ms. Method according to one of claims 1 to 4, characterized in that a control signal and a response control signal within a time interval of 20 ms to 100 ms, preferably generated by 40 ms. Method according to one of claims 1 to 5, characterized in that the control signal is generated by modulation of a carrier voltage. Method according to one of claims 3 to 6, characterized in that the response control signal is generated by modulation of a carrier voltage. A method according to claim 6 or 7, characterized in that the carrier voltage is amplitude modulated. A method according to claim 7 or 8, characterized in that the carrier voltage has a carrier frequency of at least 20 kHz, preferably from about 80 kHz to 200 kHz, more preferably of about 100 kHz. Method according to one of claims 1 to 9, characterized in that the method comprises the query of the value of a wing-side control resistor within the time interval. A method according to claim 10, characterized in that the sample value is transmitted by modulation of the voltage applied to the second coil carrier voltage to the first coil. A method according to claim 11, characterized in that a second perturbation signal is generated when the interrogation results in a sample value deviating more than a certain difference from the resistance value. Method according to one of claims 1 to 12, characterized in that the control and response control signals are encrypted. A method according to claim 13, characterized in that the control and response control signals are encrypted by means of a switching code. Method according to one of claims 1 to 14, characterized in that the method comprises the step of mutual authentication of one with the first coil ( 19 ) electrically connected primary electronics ( 38 ) and one with the second coil ( 20 ) connected secondary electronics ( 39 ). Device for carrying out a method according to one of Claims 1 to 15, with a first coil ( 19 ), with a second coil ( 20 ), wherein the first and second coils ( 19 . 20 ) are in inductive operative connection with one with the first coil ( 19 ) primary electronics ( 38 ), with a secondary electronics connected to the second coil ( 39 ), wherein the primary and the secondary electronics comprise means for generating and detecting a control signal and a response control signal. Apparatus according to claim 16, characterized in that the primary and the secondary electronics ( 38 . 39 ) Comprise means for modulating a carrier voltage with the control and response control signals. Apparatus according to claim 17, characterized in that the means comprise an amplitude modulator. Device according to one of Claims 16 to 18, characterized in that means for authenticating the primary and secondary electronics ( 38 . 39 ) are provided. Device according to one of claims 1 to 19, characterized in that the primary and the secondary electronics ( 38 . 39 ) one housing each ( 50 . 51 ), which is shielded against the leakage and penetration of electromagnetic fields. Device according to claim 20, characterized in that the housings ( 50 . 51 ) consist of a heat-conducting material, preferably from a heat-conducting plastic. Device according to one of claims 16 to 21, characterized in that the primary and the secondary electronics ( 38 . 39 ) Comprise modems for 8-bit coding of signals to be transmitted and control signals. Device according to one of claims 16 to 22, characterized in that the primary and the secondary electronics ( 38 . 39 ) each comprise a BUS system. Device according to one of claims 16 to 23, characterized in that the housings ( 50 . 51 ) of the primary and secondary electronics ( 38 . 39 ) are provided for installation in a frame or in a wing profile, preferably in profile recesses on the sides facing each other with the wing closed.

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