Invention Grant
- Patent Title: Magnetoelastic torque sensor with ambient field rejection
- Patent Title (中): 具有环境场阻抗的磁弹力矩传感器
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Application No.: US13309104Application Date: 2011-12-01
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Publication No.: US08578794B2Publication Date: 2013-11-12
- Inventor: Seong-Jae Lee
- Applicant: Seong-Jae Lee
- Applicant Address: US IL Chicago
- Assignee: Methode Electronics, Inc.
- Current Assignee: Methode Electronics, Inc.
- Current Assignee Address: US IL Chicago
- Agency: Blank Rome LLP
- Main IPC: G01L3/14
- IPC: G01L3/14 ; G01L3/00 ; G01B7/14
Abstract:
The present invention involves a method and apparatus for canceling the effects of magnetic field noise in a torque sensor by placing three sets of magnetic field sensors around a shaft, the first set of field sensors being placed in the central region of the shaft and the second and third sets of field sensors being placed on the right side and left side of the field sensors placed at the central region, respectively. A torque-induced magnetic field is not cancelled with this arrangement of field sensors but a magnetic near field from a near field source is cancelled.
Public/Granted literature
- US20120074933A1 MAGNETOELASTIC TORQUE SENSOR WITH AMBIENT FIELD REJECTION Public/Granted day:2012-03-29
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