发明名称 |
CAPACITIVE SENSOR CONFIGURED FOR USING HEATING ELEMENT AS ANTENNA ELECTRODE |
摘要 |
<p>A capacitive sensor configured for connection between a heating element and a heating current supply comprises a common mode choke (CMC) for AC-decoupling the heating element from the heating current supply. The CMC comprises first and second inductively coupled windings, the first winding for connection between a first terminal of the heating current supply and a first terminal of the heating element and the second winding for connection between a second terminal of the heating element and a second terminal of the heating current supply. The capacitive sensor further comprises a control and evaluation circuit for injecting an AC signal into the heating element via a measurement node, measuring a voltage on and/or a current across the measurement node, and to derive an impedance between the heating element and a counter electrode from the measurement. The CMC comprises a third winding inductively coupled with the first and second windings, the third winding being operatively coupled with the measurement node.</p> |
申请公布号 |
WO2014096127(A1) |
申请公布日期 |
2014.06.26 |
申请号 |
WO2013EP77283 |
申请日期 |
2013.12.19 |
申请人 |
IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A. |
发明人 |
LAMESCH, LAURENT;VIRNICH, MICHAEL;PUETZ, MICHAEL |
分类号 |
G01D5/24;B60N2/00;B60N2/56 |
主分类号 |
G01D5/24 |
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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