Invention Grant
- Patent Title: Absolute position sensor using hall array
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Application No.: US17101260Application Date: 2020-11-23
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Publication No.: US11378421B2Publication Date: 2022-07-05
- Inventor: Alfred John Santos , Mark E. LaCroix , Lei Wang
- Applicant: The Timken Company
- Applicant Address: US OH North Canton
- Assignee: The Timken Company
- Current Assignee: The Timken Company
- Current Assignee Address: US OH North Canton
- Agency: Michael Best & Friedrich LLP
- Main IPC: G01D5/245
- IPC: G01D5/245

Abstract:
A system for determining an absolute position of a device includes a high resolution track, a sensor and processing unit associated with the high resolution track, a reference track having a plurality of pole pairs arranged to define a plurality of single-track Gray code segments, and an array of Hall effect sensors associated with the reference track to output a reference signal to the sensor and processing unit indicative of the coarse absolute position of the device over the Gray code segments. A third track has at least one pole pair. At least one sensor associated with the third track outputs a signal used to determine a location within one of the plurality of Gray code segments. The sensor and processing unit combines the third track signal, the reference signal, and the position of the device over the high resolution track to determine an initial, fine absolute position.
Public/Granted literature
- US20210072049A1 ABSOLUTE POSITION SENSOR USING HALL ARRAY Public/Granted day:2021-03-11
Information query
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