Virtual rotor grounding of capacitive angular position sensors

Author

Brasseur, Georg ; Fulmek, Paul L. ; Smetana, Walter

Author_Institution

Inst. for Electr. Meas. & Meas. Signal Process., Tech. Univ. Graz, Austria

Volume

49

Issue

5

fYear

2000

fDate

10/1/2000 12:00:00 AM

Firstpage

1108

Lastpage

1111

Abstract

This paper presents a new approach for the design of capacitive angular position and angular speed sensors. The idea is to obtain nonconductive grounding of the rotatable part of the sensor. This approach allows the use of conductive rotor blades fixed to a nonconductive shaft. A simple prototype has been developed to show the theory of operation. Model calculations and experimental results show that virtual grounding allows neglecting the rotor-ground resistance in a wide range

Keywords

angular velocity measurement; capacitive sensors; position measurement; angular position measurement; angular speed sensor; automotive application; capacitive angular position sensors; carrier frequency system; conductive rotor blades; design; model; nonconductive grounding; nonconductive shaft; prototype; ratiometric measurement; rotatable part; rotor-ground resistance; virtual rotor grounding; Capacitive sensors; Dielectrics; Electrodes; Grounding; Moisture; Prototypes; Sensor systems and applications; Shafts; Stators; Transmitters;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.872938

Filename

872938