发明授权
- 专利标题： Variable frequency inductive proximity sensor
- 专利标题（中）： 变频感应接近传感器
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申请号： US416230申请日： 1995-04-04
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公开(公告)号： US5508662A公开(公告)日： 1996-04-16
- 发明人: Christophe Guichard , Didier Leonard
- 申请人： Christophe Guichard , Didier Leonard
- 申请人地址： FRX Boulogne-Billancourt
- 专利权人： Schneider Electric SA
- 当前专利权人： Schneider Electric SA
- 当前专利权人地址： FRX Boulogne-Billancourt
- 优先权： FRX9404701 19940418
- 主分类号： H04B5/00
- IPC分类号： H04B5/00 ; G01V3/10 ; G01V3/11
摘要：
A proximity sensor includes a coil for sensing metal objects which are part of an oscillatory circuit and an oscillator which drives the oscillatory circuit at a constant frequency. A tuning device is connected in parallel with the oscillatory circuit. The tuning device is a variable gain amplifier with feedback via an inductive or capacitive impedance.
公开/授权文献
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