发明授权
- 专利标题： Optical smoke detector operating in accordance with the extinction principle and method for compensating its temperature drift
- 专利标题（中）： 光学烟雾探测器按照消光原理和方法补偿其温度漂移
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申请号： US09395720申请日： 1999-09-14
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公开(公告)号： US06456379B1公开(公告)日： 2002-09-24
- 发明人: Peter Kunz , Kurt Müller , Dieter Wieser , Markus Loepfe
- 申请人： Peter Kunz , Kurt Müller , Dieter Wieser , Markus Loepfe
- 优先权： CH98117368 19980914; CH2172/98 19981027
- 主分类号： G01N2161
- IPC分类号： G01N2161
摘要：
A detector device for detecting the presence of airborne particles such as smoke includes a light source, an optical bridge, a measurement path, a reference path, a measurement receiver and a reference receiver. The optical bridge, in addition to the light source and the measurement and reference receivers, are the only optical elements of the detector device. The optical bridge includes two circular apertures arranged downstream of the light source along the radiation path. The light source is arranged in a chamber having an air reservoir, whose surface area is substantially greater than that of the light source. A temperature drift curve is determined by heating the light source and storing the detector signal at different temperatures.