发明名称 |
APPARATUS AND METHOD FOR MEASURING AN OXYGEN CONCENTRATION OF A GAS |
摘要 |
An apparatus, system and method maximizes efficiency and accuracy of measuring an oxygen concentration of a measured gas by varying a flow of oxygen ions within a measuring cell (202) in accordance with an output signal of an oxygen sensor cell (206). The pump current (208) through a pump cell (204) is switched between a constant positive current and a constant negative current when upper and lower thresholds of the output signal are reached. The pulse width ratio of the square wave produced by the varying current is compared to a pulse width ratio function derived from a calibration procedure to determine the oxygen concentration of the measured gas. |
申请公布号 |
WO2004070374(A1) |
申请公布日期 |
2004.08.19 |
申请号 |
WO2003US34867 |
申请日期 |
2003.11.01 |
申请人 |
INNOVATE! TECHNOLOGY, INC. |
发明人 |
ALLMENDINGER, KLAUS, K. |
分类号 |
G01N27/02;G01N27/406;G01N27/407;G01N27/419;G01R27/02 |
主分类号 |
G01N27/02 |
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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