Invention Grant
- Patent Title: Directional speed sensing systems and methods
- Patent Title (中): 定向传感系统和方法
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Application No.: US12561596Application Date: 2009-09-17
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Publication No.: US08427135B2Publication Date: 2013-04-23
- Inventor: Jack P. Koski , Heidi L. Simmons
- Applicant: Jack P. Koski , Heidi L. Simmons
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Main IPC: G01P3/48
- IPC: G01P3/48

Abstract:
A directional speed sensor comprises first and second Hall-effect modules. The first Hall-effect module outputs a first current pulse for a first predetermined period when a tooth of a toothed wheel that rotates with a shaft of the vehicle passes the first Hall-effect module in a first rotation direction and outputs the first current pulse for a second predetermined period when the tooth passes the first Hall-effect module in a second rotational direction. The second Hall-effect module is electrically connected in parallel with the first Hall-effect module, is angularly offset from the first Hall-effect module with respect to a center of the shaft, outputs a second current pulse for the first predetermined period when the tooth of the toothed wheel passes the second-Hall-effect module in the first direction, and outputs the second pulse for the second predetermined period when the tooth passes the second Hall-effect module in the second direction.
Public/Granted literature
- US20110025307A1 DIRECTIONAL SPEED SENSING SYSTEMS AND METHODS Public/Granted day:2011-02-03
Information query
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