发明授权
- 专利标题： Method and apparatus for monitoring an alarm system
- 专利标题（中）： 监控报警系统的方法和装置
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申请号： US375318申请日： 1982-05-05
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公开(公告)号： US4543565A公开(公告)日： 1985-09-24
- 发明人: Karla Oberstein , Peer Thilo
- 申请人： Karla Oberstein , Peer Thilo
- 申请人地址： DEX Berlin & Munich
- 专利权人： Siemens Aktiengesellschaft
- 当前专利权人： Siemens Aktiengesellschaft
- 当前专利权人地址： DEX Berlin & Munich
- 优先权： DEX3123451 19810612
- 主分类号： G02B26/00
- IPC分类号： G02B26/00 ; G08B26/00 ; G08B29/04 ; G08B29/00
摘要：
A method and apparatus for monitoring an alarm system such as a fire alarm system having a plurality of alarms connected to a central station determine the amount of departure of measured alarm values from a rated quiescent value and calculate a fluctuation value therefrom, the fluctuation value then being compared at selected time intervals with a rated limiting value. If the result of the comparison shows that the fluctuation value is less than the rated limiting value, a malfunction signal is displayed.
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