Invention Grant
- Patent Title: Position sensor having tubular detection coil
- Patent Title (中): 具有管状检测线圈的位置传感器
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Application No.: US11575009Application Date: 2006-05-12
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Publication No.: US07679361B2Publication Date: 2010-03-16
- Inventor: Masahisa Niwa , Yukiko Inooka
- Applicant: Masahisa Niwa , Yukiko Inooka
- Applicant Address: JP Osaka
- Assignee: Panasonic Electric Works Co., Ltd.
- Current Assignee: Panasonic Electric Works Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2005-140207 20050512; JP2005-140208 20050512
- International Application: PCT/JP2006/309534 WO 20060512
- International Announcement: WO2006/121146 WO 20061116
- Main IPC: G01B7/14
- IPC: G01B7/14
Abstract:
A compact position sensor with high operational reliability is provided. This sensor has a tubular detection coil, a magnetic core movable in the detection coil, a drive circuit for the detection coil, a signal processing circuit for converting a change in impedance of the detection coil into an electric signal, and a guide means for guiding a movement of the magnetic core in the detection coil. The guide means has a guide portion connected to the magnetic core and a support portion for slidably supporting the guide portion. The magnetic core can be smoothly displaced in the detection coil without contacting an inner surface of the detection coil by a sliding movement of the guide portion relative to the support portion.
Public/Granted literature
- US20080258739A1 Position Sensor Public/Granted day:2008-10-23
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