Reluctance sensor having variable threshold detection circuit

Details Reluctance sensor having variable threshold detection circuit Reluctance sensor having variable threshold detection circuit

1992-10-16

1995-08-29

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

1231465A, 324173, 32420725, 327 72, 327 94, 327337, 327516, 364565, G01P 346, G01P 3488, F02P 1702, H03K 524

Patent

active

054463750

ABSTRACT:
A reluctance sensor produces reluctance signals in response to passing slots in a rotating wheel. When a given signal exceeds a threshold, a DIG.sub.-- OUT signal is produced. When the signal falls to zero, the DIG.sub.-- OUT signal is terminated. The invention adjusts the threshold, based on the magnitude of the reluctance signals. Since the magnitude of the reluctance signals depends on wheel speed, the invention, in effect, adjusts the threshold based on wheel speed, yet without independently measuring wheel speed.

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