发明名称 |
Event detection apparatus |
摘要 |
Circuitry for qualifying a series of randomly occurring alarm events to avoid erroneous indications. Alarm events occurring in a surveillance system or the like are counted over a selected time interval, and final alarm output is effected only if a selected 1+n number of events has been counted within the interval. Both the repetitive time intervals and the event number are variable in accordance with the exigencies of the alarm application.
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申请公布号 |
US4528553(A) |
申请公布日期 |
1985.07.09 |
申请号 |
US19830524015 |
申请日期 |
1983.08.16 |
申请人 |
CONOCO INC. |
发明人 |
HASTINGS, RAY D.;BOYER, ERNEST W. |
分类号 |
G08B29/18;(IPC1-7):G08B23/00 |
主分类号 |
G08B29/18 |
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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