Proximity detector alternately operated to detect and self-check

Details Proximity detector alternately operated to detect and self-check Proximity detector alternately operated to detect and self-check

1987-04-16

1989-09-12

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Calibration

324207, 331 65, G01R 3500, G01B 714, G01N 2700

Patent

active

048663778

ABSTRACT:
A proximity detector of the integrated electronic type which includes an oscillator, which detector detects the position of a target relative to a proximity zone limit by Eddy current changes. The detector is operated over a cycle having a first period during which its functioning is checked by alternately starting and stopping the oscillator and for a second period during which the position of the target is determined.

REFERENCES:
patent: 4084135 (1978-04-01), Enabnit
patent: 4112365 (1978-09-01), Larson et al.

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