发明名称 |
Infrared intrusion detector |
摘要 |
In an infrared intrusion detector which evaluates the body radiation of an intruder by means of a dual radiation sensor having two sensor elements arranged in a differential circuit for emitting an alarm signal, a functional supervision and detection of an attempt at sabotage, e.g., by covering or spraying the entrance window, are achieved by asymmetric irradiation of the two sensor elements through the entrance window by a radiation source. The asymmetry can be achieved by disposing the radiation source outside the plane of symmetry of the sensor elements or by an asymmetrically disposed auxiliary reflector.
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申请公布号 |
US4710629(A) |
申请公布日期 |
1987.12.01 |
申请号 |
US19850813508 |
申请日期 |
1985.12.26 |
申请人 |
CERBERUS AG |
发明人 |
MUELLER, KURT;MEIER, WALTER |
分类号 |
G01J1/42;G01V8/10;G01V8/20;G08B13/18;G08B13/193;G08B29/04;G08B29/14;(IPC1-7):G01J5/08 |
主分类号 |
G01J1/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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