发明名称 |
Gas concentration detecting apparatus |
摘要 |
A gas concentration detecting apparatus comprises a gas concentration sensor and a gas concentration calculator. The sensor has first to third cells. A gas to be detected is introduced in a chamber and the first cell is responsible for discharging and changing oxygen from and into the chamber. The second cell detects a concentration of a specific gas component of the gas that has passed along the first cell. The third cell detects a concentration of residual oxygen in the gas that remains after discharge of the oxygen through the first cell. The calculator takes in a current acquired from the second cell measured with a voltage applied thereto and calculates the specific gas component concentration based on the current. The calculator includes plural concentration calculating means whose concentration detecting ranges are mutually different in a scale. The specific gas component concentration is calculated every concentration calculating means.
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申请公布号 |
US6922639(B2) |
申请公布日期 |
2005.07.26 |
申请号 |
US20030678095 |
申请日期 |
2003.10.06 |
申请人 |
DENSO CORPORATION |
发明人 |
KAWASE TOMOO;KUROKAWA EIICHI |
分类号 |
G01N27/26;G01N27/416;G01N27/419;(IPC1-7):G06F19/00 |
主分类号 |
G01N27/26 |
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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