DE29601184U1 - Room surveillance system - Google Patents

Description

S PA RI N Gr\ :RÖ WL -.:H EMSE LER

PATENT ATTORNEYS "III

EUROPEAN PATENT ATTORNEYS "

Dipl.-lng. Helmut Marsch (1934-1979) PO Box 140443

Dipl.-lng. Klaus Sparing D-40074 Düsseldorf

Dr. rer. nat. Wolf Horst Röhl

Dr. rer. nat. Daniela Henseler Phone: (0211) 671034

Fax: (0211) 663420

SPARING, HÖHL, HENSEUER ■ P.O. BOX 140443 ■ D-40074 DÜSSELDORF &Tgr;&bgr;&Igr;&bgr;&KHgr;&Igr; 8582542 SprO Ü

HTE Mindermann GmbH
Eggerscheidter Str. 112

40883 Ratingen _{403 GM 2} 6

Room monitoring system

The invention relates to a room monitoring system with a central station and at least one electronic warning device or detector that emits a signal when a certain event occurs. In particular, the system includes warning devices for protecting buildings against burglary, fire, escaping gas, water damage and the like. The signal emitted by the detector is used to trigger a visual or acoustic alarm, to activate a sprinkler system, to call a control center by telephone and so on.

Both infrared motion detectors and infrasound detectors are commonly used for burglar alarms. Infrared motion detectors respond to thermal radiation that changes over time (space) and are therefore only suitable to a limited extent for use in occupied rooms, as they also react to radiation emitted by residents and pets.

Infrasound detectors respond to pressure surges, such as those that occur when doors or windows are opened as a result of pressure equalization between the interior and the exterior.

SPARING, RdHL, HENSELER · RETHELSTRASSE 123 ■ D-40237 DÜSSELDORF

environment. They are therefore only suitable for monitoring indoor spaces. Their disadvantage is the high price, so that generally only one detector is used for an apartment or house, which then has to be set to a correspondingly sensitive level. False alarms are therefore common.

The connection between the warning device and the central station, which processes the message sent by the detector, is established either via a separately installed network or via radio. Both methods are complex and susceptible to interference.

The invention aims to create a room monitoring system that is inexpensive to manufacture and install and is less susceptible to false alarms.

The invention, as defined in claim 1, is based on the idea of providing a number of relatively insensitive and thus inexpensively manufactured detectors as close as possible to the area to be monitored instead of an expensive, highly sensitive detector, whereby additional installations for their power supply or for signal transmission can be omitted by plugging them into nearby sockets. Infrasound detectors as burglar alarms will be placed near doors and windows, gas detectors near a gas heating system, and so on. The detector signals are standardized for processing by the central station, regardless of the sensor used. Preferably, each detector is assigned its own transmitted code that identifies its location.

Inserting it into an existing socket also makes it possible to equip the detector with a battery power supply of only a small capacity, which can, however, be continuously recharged from the mains supply.

The detector itself can be designed as a socket so that a socket it occupies can continue to be used.

The attached drawing shows a detector according to the invention, namely in Fig. 1 in plan view, in Fig. 2 in front view.

The detector comprises an essentially parallelepiped plastic housing 10, onto which a plug part 12 in the form of a protective contact plug is integrally formed. The sensor part 14 of an infrasound detector (selected as an example) can be seen on the front. There is also a protective contact socket 16 on the front, which can be connected to the plug part 12; alternatively, this connection can be made as soon as the relevant detector responds.

Claims (7)

Protection claims 1. Room monitoring system, comprising a central station for the evaluation of standardized signals and at least one electronic detector transmitting such signals, inserted into a power plug that fits into a socket and designed to monitor the adjacent room volume with regard to hazards present there. 2. System according to claim 1, wherein at least one detector for infrasound, smoke, infrared radiation variation, gas, and/or water is connected to the central station. 3. System according to claim 1 or 2, wherein each detector contains a transmitter for the standardized signals. 4. A system according to claim 3, wherein the transmitter is connected to the connector pins so that the signals are transmitted to the central station via the installed network. 5. System according to one of the preceding claims, in which each detector is provided with its own battery which can be recharged from the mains. 6. System according to one of claims 1 to 7, in which each detector is itself designed as a socket. 7. System according to claim 6, in which the socket formed by the detector is only connected to the mains when the detector is activated.