EP0252230B1 - Procédé pour commander un détecteur de mouvement - Google Patents
Procédé pour commander un détecteur de mouvement Download PDFInfo
- Publication number
- EP0252230B1 EP0252230B1 EP87105735A EP87105735A EP0252230B1 EP 0252230 B1 EP0252230 B1 EP 0252230B1 EP 87105735 A EP87105735 A EP 87105735A EP 87105735 A EP87105735 A EP 87105735A EP 0252230 B1 EP0252230 B1 EP 0252230B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alarm
- detection
- movement
- motion detector
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/12—Checking intermittently signalling or alarm systems
- G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
Definitions
- the invention relates to a method for controlling a motion detector which has a sensor for a predetermined monitoring area and which can be controlled via a signaling center into an armed and an unset state.
- motion detectors are used in hazard detection technology, in particular in intrusion protection technology, for detecting moving objects.
- the motion detectors are provided with a sensor that has a predetermined range that determines the area to be monitored. Both interior and exterior surfaces can be monitored for the movement of people and motor vehicles.
- ultrasonic motion detectors which are based on the Doppler effect.
- a predetermined frequency in the ultrasonic wave range is emitted and the reflected waves are received.
- the reception frequency always deviates from the transmission frequency when people enter the effective zone or objects do not maintain their position. If the reception frequency is not the same as the transmission frequency, an alarm is triggered.
- infrared sensors are also known for securing rooms, lines or objects in closed rooms.
- the IR radiation emitted by the human body or by another heat source is bundled by a mirror optic and fed to a pyro element and by this detector emitted signal voltage processed frequency-dependent. In this way, even the smallest changes in radiation flux, ie a temporal change in the temperature difference between the ambient temperature and the respective surface temperature of the object or intruder to be monitored, can be detected.
- the known motion detectors have one essential property in common. They are designed to only record and evaluate dynamic changes.
- the motion detectors recognize this dynamic change during the duration of the sabotage attack.
- an alarm line is not evaluated or activated in the unset state. Since the diaphragm is now statically in front of the sensor, the detector cannot detect the diaphragm or a movement in the room to be monitored, even after it is switched to the armed state. Proper functioning of the motion detector is therefore no longer guaranteed. Switching to the armed state is not prevented because the inevitability that no zone is activated is fulfilled.
- the invention has for its object to provide a method of the type mentioned by which it is prevented that the alarm center or the danger alarm system connected to it can be switched to the armed state, although one or more of the associated motion detectors is not ready for operation or its function is restricted is.
- This object is achieved in that the motion detector is activated before switching from the unset to the armed state, that the output signal of the motion detector from the control center is queried and that a switchover to the armed state is prevented if no movement was detected in the monitoring area after activation of the motion detector.
- the invention has the advantage that it is possible with simple technical measures to check the functionality of the motion detectors and the entire alarm system. This test is based on the same physical detection method and the same conditions that are relevant for practical use. This realistic check, in which the detection control test corresponds exactly to the physical triggering process of the motion detectors, enables a high level of security to be achieved.
- FIG. 1 illustrates, in a perspective representation, purely schematically a cuboid space 1 that is equipped with a motion detector 2.
- this is designed as an infrared motion detector which has an active field of view formed from 10 conical monitoring zones 11 directed into space 1.
- the conical monitoring zones 11 are fanned out, so that the monitoring area increases with increasing distance from the motion detector 2.
- the distribution of the monitoring zones shown in FIG. 1 can be described as typical for a room detector, since the monitoring zones are directed essentially into the entire room 1. In the case of a so-called route detector, the monitoring zones 11 would run exclusively in a vertical plane. If an area or a distance outside a built-in room is to be monitored, an ultrasonic motion detector is preferably used instead of an infrared motion detector.
- this movement is detected by the motion detector 2. If the motion detector 2 is switched to the armed state, a message signal is transmitted to a message center (not shown). If, on the other hand, the motion detector 2 is in an unset state, this message is only displayed for the duration of the detection, but is not processed. Switching between the armed and disarmed state takes place from the alarm center.
- control lines 3 are provided in order to receive control signals from the signaling center (not shown).
- Two message lines 4 are provided for transmitting message signals to the message center.
- the control lines 3 lead to a detection control control unit 5, which is connected for the transmission of control signals with a module 6 for analog / digital conversion, with a detection evaluation unit 7, with a detection control evaluation unit 8 and with a characteristic control unit 9.
- the detection control control unit 5 receives tracking data from the characteristic control unit 9.
- the assembly 6 consists of a sensor system 60, a downstream preamplifier and main amplifier 61, 62, which can also be constructed in several stages, and a signal conditioner 63.
- the sensor system 60 can be designed as a passive or active system, multiple combinations of different physical measurement methods being possible.
- the preamplifiers and main amplifiers 61, 62 are connected downstream for analog signal processing.
- the signal conditioner 63 converts the different signals into a corresponding signal form for digital further processing.
- the detection evaluation unit 7 is activated by the detection control control unit 5. It evaluates the parameters of the digitized output signal of module 6 that are relevant for detection.
- the detection control evaluation unit 8 which lies parallel to the detection evaluation unit 7 at the output of the module 6, is likewise activated by the detection control control unit 5.
- the output signal is evaluated here on the basis of specific predetermined parameters.
- the parameters of the two amplifiers 61, 62 in the module 6 can be influenced with regard to signal amplification, frequency response and sampling and can be adapted in accordance with the requirements for detection or detection control.
- the detection control evaluation unit 8 can also take into account and evaluate changes in the temperature radiation within the monitored area, which are caused, for example, by reflection or the dwell of a radiation source.
- the output signals of the detection evaluation unit 7 and the detection control evaluation unit 8 are weighted differently in the parameter control unit 9.
- the weighting is specified by the detection control control unit 5 via a control line 51.
- the detection control control unit 5 receives data for tracking the assembly 6 via a line 52. Under the conditions to be described in the following, the two detection lines 4 are activated by the parameter control unit 9 via drivers 10.
- FIG. 3 shows the block diagram of a variant of the arrangement according to FIG. 2.
- the signal conditioner 63 is designed in such a way that a signal is sent to the detection evaluation unit 7 each time an evaluation criterion is detected.
- the respective status “armed” or “disarmed” of the reporting center (not shown) is transmitted to the detection evaluation unit 7 and the detection control evaluation unit 8 on the control line 3a.
- Each detection of a movement by the sensor system 60 is stored in the detection evaluation unit 7 and activates the actuator output C, a signal being fed into the detection line 4 via the driver 10.
- the actuator output C remains activated until a corresponding signal from the signaling center is present via the control line 3b, which activates a time-dependent, programmable signal at the output D in the detection control evaluation unit 8 in order to prepare the memory for deletion of the detection memory. If motion detection takes place within the memory deletion preparation time, this is reset and the actuator signal at actuator output C is blocked. After this time has elapsed, each detection sets this memory again and activates the actuator output C. The associated signal on the alarm line 4 prevents the alarm center from being "armed”.
- FIG. 4 shows an embodiment of an arrangement controlled by a digital process computer.
- the process computer 5 ⁇ receives serial data via a serial interface 56 via the line 3 ⁇ , which contain the respective status information of the message center and the respectively required control commands.
- a decoder 54 is controlled via a data bus 53, which adapts the parameters of the analog module 6 to this state.
- a selective gain control for example can be designed so that the active detection area of the assembly 6 remains limited to a defined distance zone.
- the detection control evaluation 8 ⁇ which has a multiple comparator 80, is activated.
- the multiple comparator 80 responds, a memory element is set in the parameter control unit 9 ⁇ and this information is transmitted to the processor 5 ⁇ via a bidirectional data bus 55. A separate memory location is assigned to each predefined comparison value of the multiple comparator 80.
- the selective amplification of module 1 is controlled by processor 5 mitor in order to adapt the detection sensitivity. For example, when a person enters the surveillance area defined in terms of distance, the gain is changed to a different comparison value. If detection is carried out in this distance zone, a detection control storage element is set in the parameter control unit 9,, with the result that a data telegram to prevent arming of the motion detector is transmitted to the alarm center.
- a data telegram with the information “detection control arming” is transmitted via the interface 56.
- the assembly 6 is then set to a corresponding gain value and an analog reference signal is activated, which can be done, for example, in the case of an infrared motion detector at a resistor 65. If the activated analog value of the motion detector corresponds to the specified comparator threshold, this status is transmitted to the alarm center. Failure to reach the value is considered a malfunction. A corresponding message is also forwarded to the reporting center.
- the assembly 6 is set to a detection control and a multiple comparator 70 with preselectable comparison thresholds is activated in the detection evaluation unit 7 ⁇ . A detection in the monitoring area of the sensor system 60 must then be recognized as a prerequisite for arming the motion detector within a predetermined period of time. If there is no detection during this period, arming is prevented.
- the motion detector 2 is in the unset state by a control signal on line 3a. In this state, however, the module 6 is still ready for operation, ie every movement in the monitoring areas 11 leads to a signal on line 64. In the disarmed state, this is statically transmitted to the control center as a fault signal. In the embodiment shown in FIG. 2, it can be prevented that a signal is present at one of the outputs of the units 9 or 7, which leads to an activation of the drivers 10 and to a signal on the detection lines 4. The disarmed state of the signaling center is signaled to the motion detector 2 via the line 3a.
- the desire to switch from the unset to the armed state is transmitted to the motion detector 2 via a signal on the control line 3b. In the exemplary embodiment shown in FIG. 3, this leads to an activation of the alarm line 4.
- An activation of the alarm line 4 means that the alarm center can no longer be armed until the alarm line is deactivated. In this context it seems important to point out that the described process must be carried out at a time when it can be assumed that there are no unauthorized persons within the surveillance zones 11. A motion message is therefore not expected at first.
- the fault detection line is set statically when the movement detector is activated in the unset state, in order to prevent the movement detector from being armed from the signaling center. As described above, arming must be preceded by a detection. The fault reporting line then transmits a change in state by resetting it to its original state.
- a simplified form of operation of the arrangement described is that only those motion detectors are subjected to a functional test in which a detection was carried out in the disarmed state and therefore an attempt could possibly have been made to put the motion detector out of operation in order to further detect it prevent later.
- This type of operation can also be expedient if a motion detector is arranged in a closed room for which there is basically no access option for carrying out the test function. In these cases, the motion detector is controlled by the alarm center in such a way that arming can take place without prior detection.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
- Alarm Systems (AREA)
- Closed-Circuit Television Systems (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
- Paper (AREA)
Claims (5)
- Procédé de commande d'un détecteur de mouvement comportant un capteur pour une plage de surveillance prédéterminée, qui peut être mis en mode actif ou en mode inactif par l'intermédiaire d'une centrale de signalisation, procédé caractérisé en ce que le détecteur de mouvement (2) est activé avant sa commutation le faisant passer de son état non actif à son état actif, le signal de sortie du détecteur de mouvement (2) est demandé par la centrale et en ce que la commutation à l'état actif n'est pas possible si après la mise en oeuvre du détecteur de mouvement (2) aucun mouvement n'est détecté dans la plage surveillée.
- Procédé selon la revendication 1, caractérisé en ce que la mise en oeuvre du détecteur de mouvement (2) se fait automatiquement.
- Procédé selon la revendication 1, caractérisé en ce que la mise en oeuvre du détecteur de mouvement se fait à la suite d'un signal de sollicitation de détection provenant de la centrale.
- Procédé selon l'une des revendications précédentes, caractérisé en ce qu'après la mise en oeuvre du détecteur de mouvement (2), on prédétermine un intervalle de temps pendant lequel doit se produire une détection de mouvement comme condition pour la commutation à l'état actif.
- Procédé selon des revendications précédentes, caractérisé en ce que la mise en oeuvre du détecteur de mouvement, puis la détection consécutive du mouvement constituant la condition de la commutation à l'état actif, seulement si pendant l'état non actif, précédent, il y a eu une détection de mouvement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87105735T ATE65855T1 (de) | 1986-07-11 | 1987-04-16 | Verfahren zum ansteuern eines bewegungsmelders. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863623447 DE3623447A1 (de) | 1986-07-11 | 1986-07-11 | Verfahren zum ansteuern eines bewegungsmelders |
DE3623447 | 1986-07-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0252230A2 EP0252230A2 (fr) | 1988-01-13 |
EP0252230A3 EP0252230A3 (en) | 1988-10-05 |
EP0252230B1 true EP0252230B1 (fr) | 1991-07-31 |
Family
ID=6304979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87105735A Expired - Lifetime EP0252230B1 (fr) | 1986-07-11 | 1987-04-16 | Procédé pour commander un détecteur de mouvement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0252230B1 (fr) |
AT (1) | ATE65855T1 (fr) |
DE (2) | DE3623447A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9415196D0 (en) * | 1994-07-28 | 1994-09-21 | Rover Group | Vehicle alarm self-check |
DE10026814B4 (de) * | 2000-05-30 | 2005-03-17 | Abb Patent Gmbh | Passiv-Infrarot-Bewegungsmelder |
CH707131B1 (de) * | 2012-10-29 | 2017-01-31 | Markus Schori | Sicherheitssystem mit integrierter Notruf-Funktion. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3189883A (en) * | 1961-12-18 | 1965-06-15 | Sylvania Electric Prod | Test and reset circuit for intrusion alarm system |
DE2923732C2 (de) * | 1979-06-12 | 1987-04-16 | Fritz Fuss Kg, 7470 Albstadt | Anordnung zur Alarmgabe bei unbefugtem Eindringen in einen geschützten Bereich |
DE3149225A1 (de) * | 1981-12-11 | 1983-06-16 | Siemens AG, 1000 Berlin und 8000 München | Hausmeldesystem (hms) |
FR2520123A1 (fr) * | 1982-01-15 | 1983-07-22 | Thomson Csf | Dispositif d'autotest pour equiper un systeme optronique |
-
1986
- 1986-07-11 DE DE19863623447 patent/DE3623447A1/de active Granted
-
1987
- 1987-04-16 EP EP87105735A patent/EP0252230B1/fr not_active Expired - Lifetime
- 1987-04-16 AT AT87105735T patent/ATE65855T1/de not_active IP Right Cessation
- 1987-04-16 DE DE8787105735T patent/DE3771792D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3771792D1 (de) | 1991-09-05 |
DE3623447A1 (de) | 1988-01-28 |
EP0252230A2 (fr) | 1988-01-13 |
EP0252230A3 (en) | 1988-10-05 |
ATE65855T1 (de) | 1991-08-15 |
DE3623447C2 (fr) | 1989-12-14 |
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