发明名称 |
Method and apparatus for determining the concentration of a target gas using an optical gas sensor system |
摘要 |
The concentration of a target gas is determined in an optical gas sensor system having an array of optical gas sensors wherein each sensor has a different sensitivity range for a target gas. An active sensor is selected from the array of optical gas sensors by determining which sensor has an optical transmittance value between 0% and 100%. Optical transmittance values of the active sensor are differentiated with respect to time. Concentration of the target gas is calculated as a function of both the rate of change of optical transmittance and the value of the optical transmittance at the beginning of the period over which the transmittance is differentiated. When a hazardous gas such as carbon monoxide is the target gas an alarm can be given when a threshold concentration is exceeded. Preferably, the transmittance values are converted to digital signals and processed in an eight-bit microprocessor to determine target gas concentration.
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申请公布号 |
US6096560(A) |
申请公布日期 |
2000.08.01 |
申请号 |
US19980198765 |
申请日期 |
1998.11.24 |
申请人 |
QUANTUM GROUP, INC. |
发明人 |
SCRIPCA, LUCIAN E.;GOLDSTEIN, MARK K. |
分类号 |
G01N21/35;(IPC1-7):G01N21/59 |
主分类号 |
G01N21/35 |
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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