A Capacitive 4-Turn Angular-Position Sensor

Research output: Contribution to journalArticlepeer-review


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 (/spl plusmn/0.35/spl deg/), and resolution (/spl plusmn/0.02/spl deg/) over the absolute measurement range of more than /spl plusmn/720/spl deg/, 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.
Original languageEnglish
Pages (from-to)275-279
JournalIEEE Transactions on Instrumentation and Measurement
Volume 47
Issue number1
Publication statusPublished - Feb 1998
Externally publishedYes


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