Title :
A capacitive 4-turn angular-position sensor
Author_Institution :
Inst. fur Allgemeine Elektrotech. und Elektronik, Tech. Univ. Wien, Austria
fDate :
2/1/1998 12:00:00 AM
Abstract :
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
Keywords :
angular measurement; automotive electronics; capacitive sensors; measurement errors; position measurement; transducers; absolute measurement; accuracy; angular rotor position; automotive applications; axial shifting; capacitive sensor; compact sensor; condensation; cost; dirt; four turn angular-position sensor; metrology applications; prototype sensor; radiometry; ratiometric measurement; resolution; rigid rotor; steering sensor; Automotive engineering; Capacitive sensors; Metrology; Position measurement; Prototypes; Robustness; Sensor phenomena and characterization; Sensor systems; Thickness measurement; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
