发明授权
- 专利标题： Composite gas sensor
- 专利标题（中）： 复合气体传感器
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申请号： US09100230申请日： 1998-06-19
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公开(公告)号： US06332965B1公开(公告)日： 2001-12-25
- 发明人: Tomio Sugiyama , Naoto Miwa , Masahiro Shibata , Hiromi Sano , Akio Tanaka
- 申请人： Tomio Sugiyama , Naoto Miwa , Masahiro Shibata , Hiromi Sano , Akio Tanaka
- 优先权： JP9-180446 19970620; JP9-342217 19971126
- 主分类号： G01N2726
- IPC分类号： G01N2726
摘要：
A composite gas sensor comprises a pump cell, a NOx sensor cell and an oxygen sensor cell. The NOx sensor cell is connected to a first ammeter and a constant power source to measure the NOx concentration of a sample gas. The pump cell is connected to a second ammeter and a variable power source to measure an air-fuel ratio of the sample gas. The oxygen sensor cell is connected to a voltmeter. A controller adjusts the variable power source to produce a constant value from the voltmeter.