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A capacitive 4-turn angular-position sensor

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1 Author(s)
G. Brasseur ; Inst. fur Allgemeine Elektrotech. und Elektronik, Tech. Univ. Wien, Austria

A robust, capacitive 4-turn angular-position sensor for automotive and metrology applications is presented. The main advantages of this low-cost system are its simplicity, speed, high accuracy (±0.35°), and resolution (±0.02°) over the absolute measurement range of more than ±720°, compact sensor outlines, and insensitivity to dirt or condensation. The paper describes the working principle, derives the required relationships for computing the angular rotor position, and discusses measurement results obtained from a prototype sensor with small outlines (50 mm diameter and 8 mm thickness) used as a steering sensor in vehicles

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:47 ,  Issue: 1 )