Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1997-10-20
2000-09-12
Brown, Glenn W.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324686, G01B 730, G01R 2726, G05B 106
Patent
active
061182834
ABSTRACT:
A capacitive rotary position sensor is provided. The rotary positions sensor includes a housing, a stator, and a rotor. The stator is formed of a disc shaped piece of insulating material including a plurality of conductive plates formed in a circular pattern on the surface of the disc. Similarly, the rotor is formed as a second disc of insulating material having a single conductive plate formed on the surface thereof. A signal generator provides a polyphase signal for driving each of the conductive plates formed on the rotor with an individual component of the polyphase signal. The stator and rotor are placed in parallel to the stator disc, and the plurality of conductive plates on the stator face the single conductive plate formed on the rotor. A thin dielectric coating applied to the rotor plate prevents the rotor conductive plate from shorting the adjacent stator conductive plates. An input shaft is attached to the rotor such that rotary motion of the input shaft alters the position of the single conductive plate relative to each of the first plurality of conductive plates. The parallel spaced rotor and stator conductive plates form a variable capacitance through which the component signals of the input polyphase signal can be capacitively coupled between the stator and rotor conductive plates. A phase detector is provided for determining the phase relationship between the components of the polyphase signal driving the stator conductive plates and an intermediate signal capacitively coupled between the stator conductive plates, and the rotor conductive plate.
REFERENCES:
patent: 4238781 (1980-12-01), Vercellotti et al.
patent: 4755731 (1988-07-01), Anthony et al.
patent: 4879552 (1989-11-01), Arai et al.
patent: 5028875 (1991-07-01), Peters
patent: 5598153 (1997-01-01), Brasseur et al.
patent: 5736865 (1998-04-01), Nelson et al.
Brown Glenn W.
Evans Steven M.
Methode Electronics Inc.
Newman David L.
LandOfFree
Capacitive rotary position sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capacitive rotary position sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive rotary position sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-99102