Method and apparatus for measuring distance using capacitance ch

Details Method and apparatus for measuring distance using capacitance ch Method and apparatus for measuring distance using capacitance ch

1997-09-23

2000-04-25

Ballato, Josie

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324662, 324690, 324682, G01B 714

Patent

active

060548665

ABSTRACT:
Method and apparatus for measuring distance includes a capacitance probe positioned adjacent a rotating member and within the housing of the rotating member such that the distance between the probe and rotating member can be measured. The rotating member and probe co-operate with each other so as to define a capacitor. An oscillator comprising a transmission line is electrically connected to the probe, the resonat frequency value of which is a function of the capacitance of the capacitor. The change in distance between the rotating member and the probe can therefore be measured.

REFERENCES:
patent: 4384819 (1983-05-01), Baker
patent: 4806848 (1989-02-01), Demers
patent: 5101165 (1992-03-01), Rickards
patent: 5119036 (1992-06-01), Rickards
patent: 5166626 (1992-11-01), Hester
patent: 5175520 (1992-12-01), Inoue
patent: 5359491 (1994-10-01), Coville
patent: 5892365 (1999-04-01), Bailleul

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