发明名称 |
SMOKE SENSOR OF ACOUSTIC WAVE TYPE |
摘要 |
The present invention provides a smoke sensor of sound wave type that excels in responsiveness and has a low probability of false detection. The smoke sensor has a sound wave generating unit that provides an ultrasound wave to a monitoring space, a sound wave receiving unit that receives the ultrasound wave from the sound wave generating unit via the monitoring space, and a signal processing unit that detects an abnormality of the monitoring space by using an output of the sound wave receiving unit. The signal processing unit includes a smoke density estimation unit that estimates a smoke density in the monitoring space on the basis of a difference between the output of the sound wave receiving unit and a standard value, and a smoke density determination unit that determines the abnormality of the monitoring space by comparing the smoke density estimated by the smoke density estimation unit with a predetermined threshold. |
申请公布号 |
EP2034462(A1) |
申请公布日期 |
2009.03.11 |
申请号 |
EP20070742748 |
申请日期 |
2007.05.01 |
申请人 |
PANASONIC ELECTRIC WORKS CO., LTD |
发明人 |
WATABE, YOSHIFUMI;HONDA, YOSHIAKI;TERASAWA, TOMIZO;TAKADA, YUJI;NISHIKAWA, TAKAYUKI |
分类号 |
G08B17/10;G01N29/00;G01N29/02 |
主分类号 |
G08B17/10 |
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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