发明授权
US5497009A Photoelectric smoke sensor and fire detecting system, and sensitivity
testing method therefor
失效
光电烟雾传感器和火灾探测系统及其灵敏度测试方法
- 专利标题： Photoelectric smoke sensor and fire detecting system, and sensitivity testing method therefor
- 专利标题（中）： 光电烟雾传感器和火灾探测系统及其灵敏度测试方法
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申请号： US329906申请日： 1994-10-27
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公开(公告)号： US5497009A公开(公告)日： 1996-03-05
- 发明人: Yasuo Torikoshi , Naoki Kosugi , Tetsuya Nagashima
- 申请人： Yasuo Torikoshi , Naoki Kosugi , Tetsuya Nagashima
- 申请人地址： JPX Tokyo
- 专利权人： Hochiki Corporation
- 当前专利权人： Hochiki Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX5-271134 19931029; JPX6-094087 19940506
- 主分类号： G01N21/53
- IPC分类号： G01N21/53 ; G08B17/107 ; G08B29/14 ; G01N15/06 ; G08B17/10
摘要：
A photoelectric sensor of the present invention includes a light emitting device and a light receiving device for detecting scattered light due to smoke, a light emitting confirming device which lights up when a quantity of light received by the light receiving device is greater than or equal to a threshold and a test light emitting device for emitting light to the light receiving device during the test, wherein a blinking of the light emitting confirming device is started at a time of a test start, and a quantity of light received by the light receiving device is increased in steps so that the blinking is stopped when the quantity is greater than or equal to the threshold. Accordingly, the sensitivity test can be performed by visually counting the number of blinkings of the light emitting device.
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