Means and method for measuring inductance

Details Means and method for measuring inductance Means and method for measuring inductance

H - Electricity

01

H

324/17, 340/124.

H01H 53/10 (2006.01) G01R 27/26 (2006.01)

Patent

CA 2005123

A proximity switch including an inductor having an actuator rod movable in proximity thereto to affect the inductance thereof. An electrical pulse of relatively short duration is applied to the inductor and the current from the inductor is measured at a selected time interval after the initiation of the pulse. When a selected value of the current is exceeded, the switch is triggered. A plurality of inductors may be sequentially interrogated by one electronic circuit, thus requiring low power and affording smooth operation. Calibration of the trigger point is accomplished electronically after mechanical installation, thus inherently compensating for mechanical tolerances and proximity effects.

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