发明授权
US5702580A Measuring sensor for determining the oxygen content of gas mixtures
失效
用于测定气体混合物氧含量的测量传感器
- 专利标题: Measuring sensor for determining the oxygen content of gas mixtures
- 专利标题(中): 用于测定气体混合物氧含量的测量传感器
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申请号: US617873申请日: 1996-03-21
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公开(公告)号: US5702580A公开(公告)日: 1997-12-30
- 发明人: Hermann Dietz , Werner Gruenwald , Claudio De La Prieta , Gert Lindemann , Ulrich Eisele , Carmen Schmiedel
- 申请人: Hermann Dietz , Werner Gruenwald , Claudio De La Prieta , Gert Lindemann , Ulrich Eisele , Carmen Schmiedel
- 申请人地址: DEX Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DEX Stuttgart
- 优先权: DEX4436222.6 19941011
- 主分类号: G01N27/41
- IPC分类号: G01N27/41 ; G01N27/417 ; G01N27/419 ; G01N27/407
摘要:
A measuring sensor for determining oxygen content in a gas mixture including exhaust gases of internal combustion engines, includes a base substrate which is comprised of a base material and which is electrically insulating; and an electrochemical measuring probe and an electrochemical reference probe arranged separate from each other on the base substrate. The measuring probe includes at least one internal electrode; at least one solid electrolyte island; and at least one external electrode. The measuring probe additionally includes a diffusion barrier. Further base material layers composed of the base material are provided so as to embed at least the diffusion barrier, the at least one internal electrodes for the measuring probe and the internal electrode for the reference probe. A diffusion hole is defined between the measuring probe and the reference probe which extends from the base substrate through the diffusion barrier and respective base material layers, and out to the gas mixture to be measured. Thermal stress and the accompanying tendency to cracking is reduced by providing the solid electrolyte as islands. Separate disposition of the measuring probe and the reference probe, i.e., without a common electrode, permits construction as individual layers using, for example, screen printing.
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