Differential eddy current sensor measuring apparatus for use wit

Details Differential eddy current sensor measuring apparatus for use wit Differential eddy current sensor measuring apparatus for use wit

1989-05-19

1990-07-24

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324234, 350611, G01B 714

Patent

active

049437712

ABSTRACT:
A differential eddy current sensor apparatus having a balance bridge to measure impedance unbalance between a pair of sensor coil which have a conductive target centered therebetween. When the target is moved toward one of the sensors the resultant impedance unbalance is detected at the bridge and demodulated by a demodulator unit to provide an analog output signal which is proportional to the target misalignment.

REFERENCES:
patent: 2864997 (1958-12-01), Von Basel
patent: 3397357 (1968-08-01), Metzker et al.
patent: 3585495 (1971-06-01), Kubo et al.
patent: 3721821 (1973-03-01), Blanyer
patent: 3961243 (1976-06-01), Schulz
patent: 4731579 (1988-03-01), Petersen et al.
patent: 4816759 (1989-03-01), Ames et al.

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