发明名称 |
Circuit arrangement for monitoring noise levels of detectors arranged in an alarm installation |
摘要 |
The circuit arrangement generating at least one noise-level warning threshold monitors the noise-level of detectors in an alarm system. The noise-level warning threshold assumes a fixed relation to the operating or working point level of the signal transmitted by the detector of the alarm system while taking into account shifts in the level of the operating or working point. An alarm storage or buffer disposed in the detector is set without transmitting an alarm signal when the noise-level warning threshold has been exceeded. The noise-level is monitored during normal operation and gives sufficiently early warning of a tendency to generate false alarms.
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申请公布号 |
US4598271(A) |
申请公布日期 |
1986.07.01 |
申请号 |
US19840582018 |
申请日期 |
1984.02.21 |
申请人 |
CERBERUS AG |
发明人 |
WAEGLI, PETER;TEMPERLI, STEFAN |
分类号 |
G08B25/00;G08B29/00;G08B29/18;G08B29/28;(IPC1-7):G08B29/00 |
主分类号 |
G08B25/00 |
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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