WO2001059735A1

WO2001059735A1 - Method, system, object detector and position detector for anti-theft security

Info

Publication number: WO2001059735A1
Application number: PCT/DE2001/000482
Authority: WO
Inventors: Jochen HÖHNE; Leo Luttenbacher; Werner Schropp; Stefan Wilken
Original assignee: Siemens Gebäudesicherheit GmbH & Co. oHG; Siemens Gebäudetechnik Bayern GmbH & Co. oHG
Priority date: 2000-02-08
Filing date: 2001-02-08
Publication date: 2001-08-16
Also published as: DE10005443A1; EP1250690A1; DE10190456D2; AU2001239164A1

Abstract

The invention concerns a method, a system, an object detector and a position detector for preventing thefts in enterprises, whereby attempted theft of a movable object (6) is detected by a an object detector (7) fixedly assigned to the object (6) in case of interference in the wireless communication from a transmitter-receiver device (20) on the object detector side to a radio station (10) or in case of reacting to theft or sabotage detection (26, 27). In said case, an identifier of the object detector (7) is transmitted, which is detected by the position detectors (11). The position detectors (11) are also wireless connected to the radio stations (10 ). The position of the stolen object ( 6) is thereby determined.

Description

description

Method, system, object and detector locating detector for thief ^¬ steel retainer

The invention relates to a method, system, egg ^¬ NEN Whether _j ektmelder and a location detector for anti-theft device from moving objects.

In many companies, the number of thefts, such as the theft of PCs, measuring devices or other inventory, is an increasing problem. The losses in relation to the respective components appear to be generally small. How often, however, is it the amount of theft that often causes damage to a company over the year, which should not be underestimated, although the damage caused by possible data loss is not yet taken into account

So far, there are often insufficient ways to protect inventory against theft, for example by locking away important equipment. Locking away or locking devices and rooms in particular leads to interruptions in work. Complex intrusion detection systems nowadays offer adequate protection against intrusion from the outside, but do not offer any possibility of preventing these so-called clutter thefts.

EP 0 911 775, for example, discloses such a hazard detection system based on radio transmission of theft and / or fire detectors to a control center, which uses a particularly energy-saving method to ensure that the detectors can also be installed in inaccessible places. In addition, the method ensures that the bidirectional transmission provided for this purpose also meets high security requirements. However, this method also has the disadvantage that it is against the Thefts are employees or persons who are already ^¬ be _like in Buildings, has no suitable device ^¬.

It is therefore specify the object of the invention, a method and a system as well as components for which endanger ^¬ Deten allowing companies without extensive Schließvorrichtun ^¬ gen protection of equipment against theft employees or already to increase in the building that are available people through.

The object is solved by erfmdungsgemaß a method having the features of claim 1, a system with the Merkma ^¬ len of claim 13, an object detector having the features of claim 15 and a tracking detector having the features of claim 22.

It is initially provided that an object detector is permanently assigned to each endangered moving object. Wireless communication eliminates the need for complex cabling work. By using object detectors, the so-called security area, which is usually restricted by rooms or buildings in conventional intrusion detection systems, is restricted to the endangered moving object. The thief is therefore outside the security area, even if he is already in the building or room. An intrusion into the security area of the movable object is thus detected.

In the preferred embodiment of the method according to claim 2, a so-called loss alarm is triggered in that the radio station determines that the communication to the object detector is disturbed.

In a further advantageous embodiment of the method according to claim 3 and the system according to claim 14 and the

Object detector according to claim 16, the object detector also recognizes that the communication to the radio station is disturbed and can m in this case send out an identifier (for example its address in the system) which is used to locate the object detector (and ^therefore the object itself).

In the advantageous embodiment of the method according to ^¬ demanding 4 of the locating detector is permanently installed and transfers information to the radio station after it has received the Peilsi- gnal. The radio station transmits this information to a central unit. The location detector can easily be installed close to the objects to be monitored, so that theft can be quickly identified.

In a preferred embodiment of the method according to claim 5, the attempted theft is recognized by a transit time measurement of the signals between the object detector and the radio station. An extended runtime of signals is a clear indication that the moving object has been removed from its original location.

In a further preferred embodiment of the method according to claim 6, the attempted theft is detected by reducing the detected reception level of the signals exchanged between the object detector and the radio station. Such a reduction in the reception level is also a clear indication that the object has been removed from its original place.

In addition, it is provided according to claim 7 that the theft and / or tamper sensors associated with the object detector are present. The anti-theft sensor can be a vibration contact according to claim 17, a position contact according to claim 18 or a mechanical contact to the standing surface of the movable object according to claim 19. This type of contact is generally known and is easy to integrate into the object detector. In order to avoid the separation of the object detector of the moving object according to claim 20 is provided, that a Sabota ^¬ gekontakt is assigned to the object detector that auslost an alarm, once the separation of the object detector and the object examined comparable.

In a particularly energy-saving variant of the method according to claim 8 and according to the location detector according to ^¬ demanding 22 is provided in that the locating detector m one associated with the locating detector detection area detection emits signals which lead to the fact that the object detector-side transmitting and receiving device emp these detection signals ^¬ catches and transmits the identifier after receiving such a detection signal. This ensures that identifiers are only sent out if a location detector for receiving the identifier m is close.

To further improve the method according to claim 9, it is provided that the object detector is additionally assigned a mobile radio communication device which, in the event of an attempted theft, contacts the central unit.

In addition, it is provided according to claim 10 that a location device (for example a GPS (global position mg system) receiver) is arranged in the object detector, which determines the position of the movable object in the event of an attempted theft.

The method according to the invention can also be easily integrated, according to claim 11, into existing hazard detection systems, fire alarm sensors and / or intrusion detection sensors additionally communicating wirelessly with the respective radio stations and the central unit being designed as a hazard detection system. Particularly simple manner, let the location of a stolen object according _ä ß claim 12 characterized find that m the central processing unit the position of the locating detector is displayed graphically, which have received the beacon.

Additives _like suddenly the object detector according to claim 21 to let equipped with a signaling device which is activated uniform over the radio station from the Zentralein ^¬. As smoke or a sound signal, by the signaling device, for example, are given off what the discovery hid portable Whether ^¬ projects facilitated by the theft.

Appendix of the figures of the drawing, the invention is explained in more detail with the aid of an exemplary embodiment. Show

Figure 1 is a schematic plan view of a building with several moving objects that are to be secured against theft, and Figure 2 is a schematic representation of the interaction between see ect detector, radio station and location detector.

1 shows a schematic plan view of a building 1 which comprises three offices 2, a hallway 3, a staircase 4 and an elevator 5. Four movable objects 6, for example PCs, are provided in the office 2. Each movable object 6 is equipped with an object detector 7. The object detectors 7 constantly communicate with a radio station 10, which is also arranged in the office 2, for example under the ceiling. Communication is preferably carried out in the so-called SRD band (short range device) with a transmission power of usually less than or equal to 5mW. Other frequency bands can also be used if the transmitting and receiving devices 20, 30 and radio stations 10 are equipped accordingly. At particularly critical points, for example in front of the elevator 5 or on the stairwell 4, location detectors 11 are arranged, for example also under the ceiling, which also correspond to the Radio stations 10 are in contact. Each locating detector 11 monitors _u case associated with it a detection region 12. The Funkstar ions 10 are connected to a central unit 13 verbun ^¬ which converge the individual information. From this central unit 13, for example, measures can be ^initiated , such as alerting the security guard or the police. If the central processing unit 13 is designed as Gefahrenmeldean ^¬ location, also other sensors, such as the ex ^¬ emplarisch shown smoke detector 14 can be interrogated in the office 2 via the radio station 10 to the central unit. 13

As shown in FIG. 2, the object detectors 7 are now constantly communicating with the respectively assigned radio station 10 via an transmitting and receiving device 20 on the object detector side. The system integrity is checked every 30 seconds, for example, by the object transmitting and receiving device 20 on the object detector side Signal transmitted to the radio station 10 and receives an acknowledgment signal from this. This signal exchange can now be used to detect an attempted theft. For this purpose, for example, the transit time measurement of the signals between the transmitter and receiver device 7 on the object detector side and the radio station 10 can be used, or the reception level of the signals can also be used. If the radio station 10 determines that a first measured value that describes the communication lies outside of predetermined tolerance values, the radio station transmits a loss alarm to the central unit 13. If the control device 21 of the object detector 7 determines that a second measured value (which is basically the the same size as the first measured value can describe) deviates too far from preset values, the transmitting and receiving device 10 sends out an identifier of the object detector 7, for example its address in the system. This identifier is detected on a location channel by the location transmitter transmitting and receiving device 30. Via the location detector control device 32, the location transmitter transmitting and receiving device 30 is activated and sends the information to the assigned ordered radio station 10. The radio station 10 transmits the information to the central unit 13, in which, for example, it can be graphically displayed which location detector 11 has ^responded . In this way, a stolen moving object 6 can be easily located. In addition, the object detector 7 can have a locating device 24 and a mobile radio communication device 25, which offer further possibilities for locating the object detector. If an attempted theft is detected, the locating device 24 determines the current position of the object detector 7, for example on the basis of the GPS (Global Positionmg System), and this can then be done via the mobile radio

Communication device 25 are transmitted directly to the central unit 13. Even so, the stolen object can be easily located.

In addition, the object detector 7 can be equipped with further theft sensors 26 and / or sabotage sensors 27. As additional theft sensors 26, for example, vibration contacts, position contacts or mechanical contacts to the stand area are produced. An attempted theft is also detected via these theft sensors. The sabotage contact 27 is implemented, for example, as a cover or tear-off contact. If this contact is triggered, an alarm is immediately transmitted to the central unit 13 via the radio station 10 connection. It can thus be avoided that the movable object 6 and the object detector 7 are separated.

The system and the method can be designed to be particularly energy-saving if the object detector 7, upon detection of an attempted theft, activates the transmission and reception device 20 in such a way that it reacts to detection signals 12 which are regularly transmitted by the position sensors 11 m to the respectively assigned detection area 12. If such a detection signal is received, the identifier of the object detector is sent to the location detector on the transmitter and receiver device 20 Transmitting and receiving device 30 transmitted. In this way it is ensured that an identifier is always sent out when the movable object 6 can be found in the vicinity of a location detector 11.

In PC's as moving objects 6, the respective Whether let _j ektmelder 7, for example terbringen on an expansion card un ^¬ that m the PC is integrated. The theft and / or sabotage sensors 26,27 of the object detector 7 serve to monitor the Offnens the Gehauseabdeckung and can detect gen of the PC via a Erschuttungssensor example, BEWE ^¬. The expansion card is powered by its own battery and is provided without any further data connection to the PC.

The location detectors 11 can be parameterized such that either all received location reports lead to an alarm or only the location reports from object detectors 7 that do not belong to the radio cell of the former location detector 11. As a rule, the reception thresholds of the location detectors 11 are obtained lie on the location channel higher than the threshold set for communication with the radio station 10. In this way, a more precise local limitation of the location of a stolen moving object 6 is loaned out.

The transmission between the radio station 10 and the object detectors 7 and the location detectors 11 can also be carried out in addition to radio, other wireless paths such as infrared light communication, if the corresponding transmitting and receiving devices 20, 30 are equipped accordingly.

Also not shown in the figures of the drawing is the possibility of designing the location detectors 11 to be mobile so that moving objects 6 that have already been brought out of the building 1 can be found in suspects. In addition, the object detectors 7 can also be equipped with a signaling device 28 which, controlled by the radio connection between the central unit 13 and / or the location detector 11 and the object detector 7, can emit a signal such as smoke or other optical signals or also acoustic signals. This makes it easier to find stolen objects 6 that have been well hidden if the rough location has already been carried out with the aid of the location detector 11.

Claims

claims

1. A method for protection against theft of at least a mobile _obj ect (6) a complex of buildings (1), which is monitored by a controlled via a central processing unit (13) overall drive alarm system in which an on or in the movable object (6) object detector (7) ^non-¬ during a theft attempt, at least one alarm message is received by the object detector (7) to the associated radio station (10) is fixed captively, the cyclic repetition to an associated radio station (10) of the danger alarm system communicates wirelessly, as long as the object detector (7) is in the reception area of the radio station (10).

2. The anti-theft device according to claim 1, characterized in that a first measured value, which characterizes the communication between the object detector (7) and the radio station (10), is constantly measured and evaluated in the radio station (10) and a change in the first measured value , which is outside a specified tolerance, is assessed as an attempted theft.

3. The method for theft protection according to one of claims 1 or 2, characterized in that a second measured value, which characterizes the communication between the object detector (7) and the radio station (10), is constantly measured and evaluated in the object detector (7) a change in the second measured value, which lies outside of a predetermined tolerance, is assessed as an attempted theft, that the object detector (7) then sends out an identifier describing this state and that the identifier is received from a location detector (11) with a known position and this position is used to locate the ^¬ be moveable object (6).

4. A process for anti-theft device according to claim 3, characterized in that the Or ^¬ tung detector (11) is permanently installed and transmits information to the radio station (10) or another radio station (10) upon receipt of the signal that this information transmitted to the central unit (13).

5. Theft protection method according to one of the claims

d a d u r c h g e k e n n z e i c h n e t that the transit time of signals between the object detector (7) and the radio station (10) is used as the first and / or second measurement value and that a detected extension of the transit time of signals is assessed as an attempted theft.

6. Theft protection method according to one of the claims

Therefore, the first and / or second measured value is the reception level of the signals exchanged between the object detector (7) and the radio station (10) and that a detected reduction in the reception level is rated as an attempted theft.

7. The method for theft protection according to one of claims 1 to 6, characterized in that the triggering of the object detector (7) associated theft (26) and / or sabotage sensor (27) is evaluated as an attempted theft.

8. Theft protection method according to one of the claims

3 to 7, characterized in that the Or ^¬ tung detector (11) m a the location detector (11) associated with the detection region (12) a detection signal sends that on the detected theft attempt, and upon receiving the detection signal by the obj ektmelderseitige transmitting / Empfangsvorπchtung (20) the identifier is sent to the location detector (11).

9. Theft protection system according to one of claims 3 to 8, characterized in that the object detector (7) is assigned a mobile radio communication device (25) that in the event of an attempted theft, the mobile radio communication device (25) sends a message to the central unit (13 ) transmitted.

10. The method for theft protection according to claim 9, characterized in that the object detector (7) is assigned a locating device (24), that the locating device (24) determines the position of the object detector (7) during an attempted theft and that the mobile radio communication device (25 ) to the central unit (13) the position of the object detector (7).

11. The anti-theft system according to one of claims 1 to 10, d a d u r c h g e k e n n z e i c h n e t that additionally fire alarm sensors (14) and / or intrusion sensors with the radio station (10) communicate wirelessly.

12. The anti-theft method according to one of claims 3 to 11, characterized in that in the central unit (13) the location of those location indicators (11) is graphically displayed that have received the identifier.

13. The system for protection against theft of at least one Move ^¬ union object (6) in a building complex (1), which is monitored by a controlled via a central processing unit (13) hazard detection system, with an object detector (7) on or in the movable object ( 6) is fixed in such a way that it cannot be lost and comprises an object detector-side transmitting and receiving device (20) and an object detector-side control unit (21) with a radio station (10) which communicates wirelessly with the object detector-side transmitting and receiving device (20) and which communicates with is connected to the central unit (13), the control unit (21) being able to detect a change in communication with the radio station (10) and / or a response from sensors (26, 27) in the event of an attempted theft.

14. Anti-theft system according to claim 13, characterized in that a location detector (11) is provided which communicates with the radio station (10), that the object detector (7) is designed such that in the event of an attempted theft, an identifier of the object detector (7 ) is sent out that the location detector (11) is designed to receive the identifier and, in the case of receipt of the identifier, transmits this to the radio station (10).

15. Object detector (7) for theft protection of moving objects (6) with an object detector-side transmitting and receiving device (20) for wireless communication with a radio station (10) and with a control unit (21), by which a change in the theft attempt Communication with the Radio station (10) and / or a response from sensors (26, 27) can be detected.

16. Whether _j ektmelder (7) for theft protection according to claim 15, characterized in that the transmitting and receiving device is designed so that it sends out an identifier in an attempted theft.

17, object detector (7) surfaces of the anti-theft device of bewegli ^¬ objects (6) according to any one of claims 15 or 16, characterized in that a theft sensor (26) is provided m the form of a Erschutterungskontakts for detecting the attempted theft.

18. Object detector (7) for the theft protection of moving objects (6) according to one of claims 15 or 16, d a d u r c h g e k e n n z e i c h n e t that an anti-theft sensor (26) is provided in the form of a position contact for detecting the attempted theft.

19. Object detector (7) for the theft protection of moving objects (6) according to one of claims 15 or 16, characterized in that an anti-theft sensor (26) in the form of a mechanical contact with the standing surface of the moving object (6) to detect the attempted theft is provided.

20. Object detector (7) for the theft protection of movable objects (6) according to one of claims 15 to 19, d a d u r c h g e k e n n e e c h n t that a sabotage contact (27) for detecting the attempted theft vorese¬

21. Object detector (7) for the theft protection of moving objects (6) according to one of claims 15 to 20, characterized in that a signal device (28) is provided which emits a signal from the control unit (21) in the event of a message from the radio station (10) and / or the location detector (11).

22. Location detector (11) for the theft protection of moving objects (6), m or on which an object detector (7) is fixed captively, characterized by a transmitting and receiving device (30) for wireless communication with a radio station (10) and one Control unit (32) which sends a message to the radio station (10) if an identifier of an object detector (7) is received by the transceiver (30).

23. Location detector (11) according to claim 22, so that the transmitting and receiving device (30) is designed to repeatedly transmit a detection signal to the detection detector (11) assigned to the detection area (12).