发明授权
- 专利标题: Capacitive proximity switch
- 专利标题(中): 电容接近开关
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申请号: US10913498申请日: 2004-08-09
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公开(公告)号: US07205777B2公开(公告)日: 2007-04-17
- 发明人: Joerg Schulz , Gerhard Heilig , Heidrun Richter , Bernd Steegmann , Martin Witte , Gianni Uselli
- 申请人: Joerg Schulz , Gerhard Heilig , Heidrun Richter , Bernd Steegmann , Martin Witte , Gianni Uselli
- 申请人地址: DE Essen DE Veldbert
- 专利权人: i f m electronic GmbH,Huf Huelsbeck & Fuerst GmbH & Co., KG
- 当前专利权人: i f m electronic GmbH,Huf Huelsbeck & Fuerst GmbH & Co., KG
- 当前专利权人地址: DE Essen DE Veldbert
- 代理商 David S. Safran
- 优先权: DE10336335 20030808
- 主分类号: G01R27/26
- IPC分类号: G01R27/26 ; B60L3/00 ; B60R25/10 ; G08B21/00
摘要:
A capacitive proximity switch for detecting the change in the capacitance relative to a setpoint capacitance by the approach or retreat of an object in the sensitive area of a proximity switch, especially for use in the door handle of a motor vehicle, provides reliable error detection and error suppression at a fundamentally high sensitivity of the capacitive proximity switch by utilizing an evaluation unit that evaluates a measured value of the change in capacitance over time and depending on the time behavior of the measured value activates changes the operating threshold from a first threshold (which can be caused by a false object coming into or out of the sensitive area of the proximity switch) to a higher second threshold which can be reached only at a relatively greater change in capacitance caused by a target object coming into or out of the sensitive area of the proximity switch.
公开/授权文献
- US20050068712A1 Capacitive proximity switch 公开/授权日:2005-03-31
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