Capacitance position sensor and position controller equipped...

Details Capacitance position sensor and position controller equipped... Capacitance position sensor and position controller equipped...

2005-03-01

2005-03-01

Le, N. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S658000, C324S660000, C324S662000

Reexamination Certificate

active

06861848

ABSTRACT:
A capacitance position sensor includes a pair of opposed tabular electrodes, an LC oscillator circuit having a toroidal core winding and whose oscillating frequency varies with change in capacitance between the pair of electrodes, and an arithmetic processing unit for calculating an absolute value of a distance between the electrodes from the oscillating frequency of the oscillator circuit. A position controller includes a stationary member formed with one electrode of the pair of electrodes of the position sensor, a movable member on which the other electrode of the pair of electrodes is formed, and moving device for moving the movable member relative to the stationary member.

REFERENCES:
patent: 3974825 (1976-08-01), Normann
patent: 5083470 (1992-01-01), Davis et al.
patent: 6456182 (2002-09-01), Katayama et al.
patent: 6469523 (2002-10-01), Sporl et al.
patent: 9-178407 (1997-07-01), None
patent: 11-201708 (1999-07-01), None

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