发明名称 |
Smoke sensor and monitor control system |
摘要 |
A smoke sensor includes a light receiving unit for temporally alternately receiving scattered light of two different wavelengths lambda 1 and lambda 2; a calculating unit for performing a calculation required for smoke detection, on a scattered light output y of the wavelength lambda 1 and a scattered light output g of the wavelength lambda 2 from the light receiving unit; and a smoke detection processing unit for performing a smoke detection process on the basis of a calculation result output from the calculating unit. The calculating unit estimates an output value of one of the scattered light output y of the wavelength lambda 1 and the scattered light output g of the wavelength lambda 2 at a sample timing of the other output, and obtains a ratio of the estimated output value of the one scattered light at the sample timing of the other output to an output value of the other scattered light, as a two-wavelength ratio. <IMAGE> |
申请公布号 |
EP0877345(A3) |
申请公布日期 |
2000.04.19 |
申请号 |
EP19980108057 |
申请日期 |
1998.05.04 |
申请人 |
NITTAN COMPANY, LIMITED |
发明人 |
SUZUKI, TAKASHI;YAMAZAKI, RYUICHI;YOSHIKAWA, YUKI |
分类号 |
G01N21/53;G08B17/00;G08B17/107 |
主分类号 |
G01N21/53 |
代理机构 |
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