发明授权
US6011389A Induced current position transducer having a low power electronic circuit
失效
具有低功率电子电路的感应电流位置传感器
- 专利标题: Induced current position transducer having a low power electronic circuit
- 专利标题(中): 具有低功率电子电路的感应电流位置传感器
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申请号: US912567申请日: 1997-08-18
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公开(公告)号: US6011389A公开(公告)日: 2000-01-04
- 发明人: Karl Masreliez , Nils Ingvar Andermo , Kim W. Atherton
- 申请人: Karl Masreliez , Nils Ingvar Andermo , Kim W. Atherton
- 申请人地址: JPX Kawasaki
- 专利权人: Mitutoyo Corporation
- 当前专利权人: Mitutoyo Corporation
- 当前专利权人地址: JPX Kawasaki
- 主分类号: G01B7/00
- IPC分类号: G01B7/00 ; G01D5/20 ; G01B7/14 ; G01B7/02
摘要:
An inductive transducer system for use in high accuracy applications such as linear or rotary encoders, employs two members movable relative to each other. A first, active member induces eddy currents in a second, passive member that lacks a power source or electrical wires connected thereto. The first, active member contains both a transmitter for generating a magnetic field and a receiver for receiving the field. The receiver has a plurality of symmetric loops. Electronic circuitry coupled to the receiver evaluates the relative position between the two members as the passive member disrupts the magnetic field received by the receiver. The inductive transducer can be readily manufactured using known printed circuit board technology, and is substantially immune to contamination by particles, including ferromagnetic particles, oil, water and other fluids. A pulse-driven drive circuit allows the inductive transducer to consume little power, and thus allows the transducer to be readily incorporated into hand-held, battery-powered measurement tools.
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