초록 ▼

The invention is concerned with a device for the detection of moving objects which are warmer or cooler than a static environment. The device consists of a detector unit (1) connected to a preamplifier (2), a signal processing unit (3), and output detector device (4). The device is characterized in

The invention is concerned with a device for the detection of moving objects which are warmer or cooler than a static environment. The device consists of a detector unit (1) connected to a preamplifier (2), a signal processing unit (3), and output detector device (4). The device is characterized in that the detector unit consists of a conventional Peltier element (5), one of whose sides (6) is placed in good thermal contact with a heat sink (8) and that the other side (7) of the Peltier element (5) is used as a radiation-sensitive detector surface. This radiation-detecting surface may be provided with a radiation-absorbing layer (9). The current supply terminals (10, 12) of the Peltier element are connected to a band-pass filter (11) which, in turn, is connected to a low-noise preamplifier (2). By having the electronic circuitry based on C/MOS technology, and since the detector draws no current, provision of a suitable battery makes the unit self-sufficient for approximately ten years. The device according to the invention can be arranged to communicate with other devices in an alarm situation by wire-less technology.

대표청구항 ▼

A device for the detection of moving bodies which are warmer or cooler than the surroundings, comprising an infrared-sensitive detector connected to a preamplifier and a signal processing unit arranged to send electrical signals to an output means, wherein said detector consists of a Peltier element

A device for the detection of moving bodies which are warmer or cooler than the surroundings, comprising an infrared-sensitive detector connected to a preamplifier and a signal processing unit arranged to send electrical signals to an output means, wherein said detector consists of a Peltier element having a hot side and a cold side and a current supply terminal, one side of said Peltier element being placed in good thermal contact with a heat sink of high heat capacity and the other side being arranged to serve as the radiation-sensitive detector surface of the detector; and further characterized in that the current supply terminal of the Peltier element is connected to the input of a band-pass filter whose output is connected to the signal input of said preamplifier.