EP1134711A1 - Logement pour détecteur d'alarme - Google Patents

Logement pour détecteur d'alarme Download PDF

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Publication number
EP1134711A1
EP1134711A1 EP00104979A EP00104979A EP1134711A1 EP 1134711 A1 EP1134711 A1 EP 1134711A1 EP 00104979 A EP00104979 A EP 00104979A EP 00104979 A EP00104979 A EP 00104979A EP 1134711 A1 EP1134711 A1 EP 1134711A1
Authority
EP
European Patent Office
Prior art keywords
cover
transmitter
housing
housing according
receiver
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.)
Withdrawn
Application number
EP00104979A
Other languages
German (de)
English (en)
Inventor
Janko Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schweiz AG
Original Assignee
Siemens Building Technologies AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP00104979A priority Critical patent/EP1134711A1/fr
Publication of EP1134711A1 publication Critical patent/EP1134711A1/fr
Withdrawn legal-status Critical Current

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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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room
    • G08B13/128—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room the housing being an electronic circuit unit, e.g. memory or CPU chip

Definitions

  • the present invention relates to a housing for a hazard detector with a bottom and a connectable with this cover and with a device for monitoring the mutual Location of bottom and lid.
  • cover contacts provide for the two Conditions, lid closed and lid not closed, each one is unique and can be transmitted remotely Signal by closing the contact when the lid is closed and not when closed lid is open. But when the contact is closed, you do not know whether it is is not defective, for example jammed.
  • the invention is now to provide a housing for a hazard detector, the Device for monitoring the mutual position of the bottom and lid a safe Detection of every attempt to open the housing and other attempts at sabotage is made possible.
  • the function of the monitoring device should be checked without manual Manipulation on the detector may be possible.
  • this object is achieved in that the monitoring device mentioned Has means which for an automatic or remote-controlled review of the Functionality of the monitoring device are formed.
  • a first preferred embodiment of the housing according to the invention is characterized in that that the means mentioned are formed by an optical system which has a transmitter and a receiver and on the bottom and / or on the lid of the housing is arranged, the size of the receiver signal the closed or open state of the housing.
  • the functionality is checked by temporarily switching off the Transmitter.
  • the transmitter is preferably temporarily switched off by the detector itself initializable or remotely controllable from a central office.
  • the monitoring device also offers very good protection against foaming of the detector, because in this case the receiver would also not receive any signal. It is regardless of how the foam material gets into the detector, even an injection would be detected through a specially drilled hole in the lid.
  • a second preferred embodiment of the housing according to the invention is characterized in that that the optical system is formed by a reflection light barrier, at which the transmitter and the receiver are arranged on one part of the housing and the second part of the housing reflects the light from the transmitter to the receiver Area.
  • a third preferred embodiment of the housing according to the invention is characterized in that that the optical system is formed by a light barrier, in which closed lid a part of the light emitted by the transmitter is blocked and at If the cover is not closed, the light from the transmitter falls freely onto the receiver.
  • a fourth preferred embodiment is characterized in that a printed circuit board in the cover is attached, and that the transmitter and receiver of the optical system on the the bottom side of the circuit board are arranged.
  • the partial blocking of the light emitted by the transmitter is preferably carried out by a web arranged on the floor, the one edge of the light emitted by the transmitter partially covers.
  • the detector is attached to the wall with an articulated bracket, it is advantageous to use the To arrange web or a suitable panel on this hinge bracket and by a corresponding Lead recess into the detector interior. This gives you the opportunity, too detect an intentional or unintentional rotation of the detector in its holder to be able to.
  • the connection between the bottom 1 and the lid 2, which is not the subject of the present Forming a patent application is preferably a locking connection that can be fixed with a screw.
  • the bottom 1 has two projections on its lower transverse edge 3 arranged slots 4, which for receiving corresponding, on the lower transverse edge of the lid 2 arranged lugs (not shown) are provided.
  • the lid 2 is pushed into the slots 4 with the lugs, being one from the bottom 1 Angle of about 30 ° is pivoted away.
  • the cover 2 is fixed in this position on the bottom 1 and is then folded against the floor, at the end of this movement in the area the upper transverse edge of the bottom 1 arranged resilient hook 5 in corresponding Snap in counterparts of cover 2.
  • the cover 2 is then screwed 6 fixed to a nose 7 lying between the hooks 5.
  • the head of screw 6 is in the lid 2 covered by a tab so that the screw 6 for an observer without further investigation the detector is not recognizable.
  • the bottom 1 contains at its upper end, just below the hook 5, a socket element 8 of an electrical connector and is in its lower, by a crosspiece 9th separated half, essentially empty.
  • the cover 2 contains a circuit board 10 which among other things, the evaluation electronics of the detector, an infrared sensor 11 and an infrared mirror 12 for bundling the through an infrared window 13 in the lid 2 on the Infrared mirror 12 carries infrared radiation on the infrared sensor 11.
  • the evaluation electronics of the detector an infrared sensor 11 and an infrared mirror 12 for bundling the through an infrared window 13 in the lid 2 on the Infrared mirror 12 carries infrared radiation on the infrared sensor 11.
  • the pin element As a counterpart to the socket element 8 14 of the electrical connector arranged, which when closing the housing in the socket element 8 is inserted, thereby making electrical contact with the power supply and possible data lines is established.
  • the power line and everyone else Lines are led through openings in the bottom 1 to the socket element 8.
  • the bottom 1 has a transverse strip 15 surrounded by weak points (predetermined breaking points) Screw-in holes 16 for fastening screws and with one towards the front, against the circuit board and thus against the cover 2, projecting web 17.
  • the attachment of the detector a wall is made by screws through holes, not shown, next to the horizontal strip 15 came across.
  • the screws passed through the screw holes 16 serve not for fastening the detector, but for fixing the transverse strip 15 to the wall. Because of the predetermined breaking points around the horizontal stripe 15, when the detector was torn off break out the wall of the transverse strips 15 from the bottom 1 and remain on the wall.
  • transmitter 18 and receiver 19 are positioned on different sides of the web.
  • the height of the web 17 is dimensioned that with the lid 2 closed only part of the light emitted by the transmitter 18 falls on the receiver 19 and the rest of the web 17 is scattered into the interior of the housing and / or is reflected.
  • the web 17 thus forms an aperture for the light emitted by the transmitter 18. As soon as the lid 2 is lifted even slightly, it increases on the receiver 19 falling light portion and a corresponding sabotage signal is generated.
  • the light barrier 18, 19 forms a device together with the web 17 acting as a diaphragm to monitor the mutual position of bottom 1 and cover 2 and thus the condition of the detector housing, each with the cover 2 closed and when it is lifted off generates a signal. If the web 17, as shown in Fig. 2, on the transverse strip 15 is provided, the device also monitors the detachment of the detector from the wall. In such a case, the horizontal stripe attached to the wall breaks 15 out of the floor and remains together with the web 17 on the wall, so that the the proportion of light falling in the receiver increases.
  • the transmitter 18 sends out a pulsed signal, which is in the receiver 19 generates a corresponding received signal. This is with the housing closed relatively small and much larger when the housing is open. To check the functionality the monitoring device, the transmitter 18 is switched off. If now the reception signal zero or very small, then the device works properly. If not, lies a malfunction.
  • the web 17 outside of the Cross strip 15 may be provided on the floor 1.
  • the web 17 on the Printed circuit board 10 and the light barrier 18, 19 may be arranged on the floor 1. It is essential that the active system forming the monitoring device interacts contains, of which which on the bottom 1 and others on the lid 2 or on associated parts of the detector are arranged.
  • the web can or a suitable screen on the hinge bracket and by a corresponding Recess in the floor into the detector interior.
  • the monitoring device described is not only for passive infrared detectors usable of the type shown, but for motion and intrusion detectors Type, such as microwave or dual detectors (see EP patent application No. 99 110 848.1) and in general for hazard detectors with a bottom and cover existing housing.
  • Such detectors are, for example, noise or structure-borne noise detectors (see EP-A-0 664 531).
  • FIG. 3 shows a variant of the monitoring device shown in FIG. 2. This is as shown by a reflection light barrier with a transmitter 20 and a receiver 21 formed, both of which are arranged on the bottom 1 of a detector housing.
  • the beam of light the transmitter 20 is directed against the cover 2 or the printed circuit board 10 (FIG. 2) and is reflected by this or this to the receiver 21.
  • the lid 2 or the circuit board 10 can be a relatively small reflective at the point of impact of the light beam of the transmitter 20 Have range.
  • cover 2 There are three options for opening cover 2: If cover 2 is the same as for the housing 1 and 2 is pivoted open, the angle of incidence of the beam of the transmitter changes 20 and the reflected beam no longer reaches the receiver 21. If the lid is guided in parallel and is lifted perpendicular to the floor 1, the distance between changes Bottom and lid and the beam emitted by the transmitter 20 also do not reach more on the receiver 21. If the lid or circuit board has a reflective area then the beam of the transmitter no longer strikes it. If the bottom one Straight rail guide with a safeguard against lifting, in which the cover is displaceable parallel to the floor and the cover has a reflective area of the aforementioned Type, the beam of the transmitter no longer strikes when the cover is pulled out the reflective area and the receiver signal decrease significantly.
  • the receiver signal is normal Operating condition, with the housing closed, of a certain size and decreases when Open the case towards zero.
  • the receiver signal is also very small and is in the region of zero.
  • the light barrier can of course be used in the monitoring device shown in FIG. 3 20, 21 also arranged on the cover 2 or the printed circuit board 10 (FIG. 2) and the Light beam of the transmitter 20 should be directed towards the floor.
  • This monitoring device is Suitable for all types of hazard detectors with a two-part or multi-part housing. Multiple means that the lid consists of more than one part. In such a case for example, the light beam of the transmitter from the bottom to a first cover part, from this back to the floor and from there to a second cover part and from this to the Straighten the recipient.
  • the described device for monitoring unauthorized opening of the detector is not limited to optical systems of the type shown. Rather, all types of come active systems, these are systems that cover the lid for each of the two states and lid open to generate a signal, in question. Such active systems are also suitable are, for example, magnetic systems with a coil and a ferromagnetic core, the core causing a change in inductance when the cover is lifted in the coil.
  • the functionality of the monitoring device could be checked here by that an inductive interference source is excited and thereby an interference field is generated, which in the Coil causes a recognizable change in inductance.
  • capacitive systems with, for example, a fixed electrode on the circuit board and a conductive housing base or with two fixed electrodes on the PCB and a non-conductive bottom as part of a dielectric. With these capacitive The voltage change is due to the change in capacity when the system is opened Cover detected.
  • the optical systems shown have the compared to the latter systems Advantage of insensitivity to magnetic interference fields and electrostatic discharges on the housing cover. They also enable reliable detection of Foaming the detector.
  • the device shown in Fig. 2 has the additional The advantage that the detachment of the detector from the wall is also reliably detected.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Burglar Alarm Systems (AREA)
EP00104979A 2000-03-09 2000-03-09 Logement pour détecteur d'alarme Withdrawn EP1134711A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00104979A EP1134711A1 (fr) 2000-03-09 2000-03-09 Logement pour détecteur d'alarme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00104979A EP1134711A1 (fr) 2000-03-09 2000-03-09 Logement pour détecteur d'alarme

Publications (1)

Publication Number Publication Date
EP1134711A1 true EP1134711A1 (fr) 2001-09-19

Family

ID=8168064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00104979A Withdrawn EP1134711A1 (fr) 2000-03-09 2000-03-09 Logement pour détecteur d'alarme

Country Status (1)

Country Link
EP (1) EP1134711A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101930659B (zh) * 2009-06-23 2012-07-18 英华达（上海）科技有限公司 警示系统、监控装置及监测受控装置的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325751A (ja) * 1992-05-21 1993-12-10 Matsushita Electric Works Ltd 異常信号発生機器
WO1996006865A1 (fr) * 1994-08-28 1996-03-07 Visonic Sicherheitstechnik Gmbh Detecteur d'intrus infrarouge pourvu d'un dispositif de detection d'occultation
US5675319A (en) * 1996-04-26 1997-10-07 David Sarnoff Research Center, Inc. Tamper detection device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325751A (ja) * 1992-05-21 1993-12-10 Matsushita Electric Works Ltd 異常信号発生機器
WO1996006865A1 (fr) * 1994-08-28 1996-03-07 Visonic Sicherheitstechnik Gmbh Detecteur d'intrus infrarouge pourvu d'un dispositif de detection d'occultation
US5675319A (en) * 1996-04-26 1997-10-07 David Sarnoff Research Center, Inc. Tamper detection device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 137 (E - 1518) 7 March 1994 (1994-03-07) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101930659B (zh) * 2009-06-23 2012-07-18 英华达（上海）科技有限公司 警示系统、监控装置及监测受控装置的方法

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