Resonant inductive debris detecting apparatus

Details Resonant inductive debris detecting apparatus Resonant inductive debris detecting apparatus

1993-02-22

1996-06-18

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Fluid material examination

324236, 340631, G01N 2774, G01R 3312, G08B 1710

Patent

active

055281389

ABSTRACT:
A debris detecting apparatus is provided which collects debris from a fluid system in a screen member and measures the accumulation of debris by measuring the change of inductance in a coil surrounding a portion of the screen member. A bridge detection means is used which includes the inductive coil as one leg of the bridge. A second sensor in the fluid connected as a second leg of the bridge provides temperature compensation for the bridge. The bridge is excited with a high frequency voltage at or near the resonant frequency of the sensing coil.

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Engine Monitoring System, Bruce D. Nordwall, Aviation Week & Space Technology, Mar. 9, 1992.
Electrstatic Engine Monitoring System & Inductive Debris Monitor, Smith Industries-Florham Park Division, Florham Park, NJ.

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