发明名称 |
Gas alarm |
摘要 |
A gas detector is disclosed which includes a CO sensor and a processor. The CO sensor senses an environmental CO concentration and provides a variable electrical output in response. The processor receives digitized samples of the sensor's electrical output and computes, with each measurement sample, a COHb level of a hypothetical person exposed to the CO concentration sensed. The computation involves determining an equilibrium COHb level for each measurement sample, which is compared with a previously computed COHb level associated with previously measured samples. The previously computed COHb level is updated based on the comparison. When the computed COHb level is above a predetermined danger threshold, the processor preferably causes an audible and visual alarm to be activated to alert any persons present. The gas detector can further include a CH4 sensor coupled to the processor for independently sensing CH4 levels such that an alarm is activated when the CH4 levels are above a predefined threshold. A hydrophobic zeolite filter is disposed on the sensor elements of one or both of the CO and CH4 sensors to prevent erroneous readings.
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申请公布号 |
US5764150(A) |
申请公布日期 |
1998.06.09 |
申请号 |
US19960631642 |
申请日期 |
1996.04.10 |
申请人 |
FLEURY, BYRON;STANTON, ANDREW |
发明人 |
FLEURY, BYRON;STANTON, ANDREW |
分类号 |
G01N33/00;G01N33/49;G08B21/12;G08B21/14;G08B21/16;(IPC1-7):G08B17/10 |
主分类号 |
G01N33/00 |
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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