发明授权
- 专利标题: Infrared intrusion detector
- 专利标题(中): 红外入侵检测器
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申请号: US813508申请日: 1985-12-26
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公开(公告)号: US4710629A公开(公告)日: 1987-12-01
- 发明人: Kurt Muller , Walter Meier
- 申请人: Kurt Muller , Walter Meier
- 申请人地址: CHX Mannedorf
- 专利权人: Cerberus AG
- 当前专利权人: Cerberus AG
- 当前专利权人地址: CHX Mannedorf
- 优先权: CHX00058/85 19850108
- 主分类号: G01J1/42
- IPC分类号: G01J1/42 ; G01V8/10 ; G01V8/20 ; G08B13/18 ; G08B13/193 ; G08B29/04 ; G08B29/14 ; G01J5/08
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.
公开/授权文献
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