Title :
A robust capacitive angular speed sensor
Author :
Fabian, Tibor ; Brasseur, Georg
Author_Institution :
Inst. fur Allgemeine Elektrotech. und Elektronik, Univ. of Technol. Vienna, Austria
fDate :
2/1/1998 12:00:00 AM
Abstract :
This paper presents a contactless capacitive angular speed sensor for automotive applications. The sensor is based on a passive rotating electrode plated between two mechanically static and electrically active electrodes. Differing characteristics of the charge transfer at various sensor positions is utilized as an input for the determination of the rotational speed. The mathematical model of the sensor further enables the optimization of the sensor characteristics for specific applications. Experimental results from a prototype designed for the speed measurement of a steering wheel show a relative speed error of ±4% at a resolution better than 1°/s
Keywords :
angular velocity measurement; automotive electronics; capacitive sensors; electrodes; measurement errors; optimisation; pulse amplitude modulation; signal processing; angular speed sensor; automotive applications; charge transfer; contactless capacitive sensor; electrically active electrodes; optimization; passive rotating electrode; prototype; pulse amplitude modulation; ratiometric measurement; robust capacitive angular speed sensor; rotational speed; signal model; speed error; speed measurement; static electrodes; steering wheel; Automotive applications; Capacitive sensors; Charge transfer; Contacts; Electrodes; Mathematical model; Prototypes; Robustness; Sensor phenomena and characterization; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
