发明名称 |
Method for detecting a level of contamination of a particle sensor, and particle sensor |
摘要 |
In a method for detecting a level of contamination of a particle sensor provided with two electrodes situated on an insulator material for generating an electrical field, the insulator material is heated to above a limiting temperature of the insulator material at which the insulator material begins to become conductive. The insulator material is modulated by heating or cooling, the modulation being carried out at a lower temperature and an upper temperature which are each above the limiting temperature. The variation over time of a measuring signal which may be picked up between electrodes is measured during the modulation. The measured variation over time of the measuring signal is compensated using a theoretical variation over time of the measuring signal in a contamination-free state of the particle sensor in order to obtain a variation over time of a differential signal. |
申请公布号 |
US8332161(B2) |
申请公布日期 |
2012.12.11 |
申请号 |
US20080733955 |
申请日期 |
2008.09.18 |
申请人 |
DIEHL LOTHAR;KUHN BETTINA;SCHITTENHELM HENRIK;ROBERT BOSCH GMBH |
发明人 |
DIEHL LOTHAR;KUHN BETTINA;SCHITTENHELM HENRIK |
分类号 |
G01N25/00;G06F19/00 |
主分类号 |
G01N25/00 |
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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