Amplification circuit for increasing variable reluctance...

Details Amplification circuit for increasing variable reluctance... Amplification circuit for increasing variable reluctance...

2005-06-21

2005-06-21

Le, N. (Department: 2862)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

Reexamination Certificate

active

06909277

ABSTRACT:
An apparatus and method for measuring a characteristic, such as speed, of a machine. A variable reluctance sensor (VRS) is coupled to a resistive element, which filters a portion of a basic output signal generated by the VRS having a frequency above a prescribed threshold level, thus removing high-frequency noise from the basic output signal. An amplifier amplifies the filtered output signal. The filtered, amplified output signal has an increased signal-to-noise ratio such that the machine characteristic, i.e. speed, can be more accurately measured during a slow speed operation. A controller generates a control signal received by a switching device to decouple the resistive element when machine speed exceeds a prescribed threshold level. Then, the basic output signal is used to measure the characteristic of the machine during normal machine operation.

REFERENCES:
patent: 3650149 (1972-03-01), Howes
patent: 4866298 (1989-09-01), Kniss et al.
patent: 4902970 (1990-02-01), Suquet
patent: 5012207 (1991-04-01), Edwards
patent: 5143159 (1992-09-01), Young et al.
patent: 5144233 (1992-09-01), Christenson et al.
patent: 5165271 (1992-11-01), Stepper et al.
patent: 5196793 (1993-03-01), Good et al.
patent: 5352938 (1994-10-01), Wise et al.
patent: 5633797 (1997-05-01), Hornback
patent: 5726888 (1998-03-01), Hornback
patent: 5861744 (1999-01-01), Earl
patent: 6094044 (2000-07-01), Kustera et al.
patent: 6411080 (2002-06-01), Bach et al.

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