发明名称 |
PROCEDE ET DISPOSITIF DE DETECTION DU TENEUR DE GAZ COMBUSTIBLE D'UNECERTAINE ATMOSPHERE |
摘要 |
A two stage process for interrogating a detector of the concentration of combustible gas in an atmosphere. In a first stage, the detector is supplied with a low voltage and the supply is cut and an optional alarm is sounded if a positive signal has been detected. In a second stage, if the signal detected in the first stage is negative or zero, then the detector is supplied with a second, higher voltage. The signal is compared to a predetermined range and, if not within that range, an optional alarm is sounded. A device to apply the process comprising a detector, an amplifier of the signal issued by the detector, a voltage reducing circuit, and a switch that controls the voltage reducing circuit slaved by a discriminator to the sign and/or to the maximum amplitude of the signal output by the amplifier. Application of the process and device to the detection of the concentration of methane. |
申请公布号 |
RO83925(A) |
申请公布日期 |
1984.04.12 |
申请号 |
RO19820109077 |
申请日期 |
1982.11.19 |
申请人 |
CHARBONNAGES DE FRANCE,FR |
发明人 |
BOUTONNAT,MAURICE,FR;ROSE,GERARD,FR |
分类号 |
G01N27/04;G01N27/16;G01N33/00;G08B21/00 |
主分类号 |
G01N27/04 |
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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