Resonant circuit for increasing variable reluctance sensor...

Details Resonant circuit for increasing variable reluctance sensor... Resonant circuit for increasing variable reluctance sensor...

2005-04-26

2005-04-26

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

C324S207250

Reexamination Certificate

active

06885186

ABSTRACT:
An apparatus and method for measuring a characteristic of a machine. A variable reluctance sensor (VRS) is coupled to the machine. A first switching device and capacitor, coupled in parallel with the VRS, boosts a variable amplitude of a basic output signal generated by the VRS to increase the signal-to-noise ratio. A control input of the first switching device receives signals, and a modified output signal is generated by the first switching device, having a variable amplitude that is substantially higher than the variable amplitude of the VRS. The modified output signal has an increased signal-to-noise ratio such that machine speed can be more accurately measured during a start-up phase.

REFERENCES:
patent: 4359717 (1982-11-01), Huber et al.
patent: 5352938 (1994-10-01), Wise et al.
patent: 5726888 (1998-03-01), Hornback
patent: 6522131 (2003-02-01), Hiligsmann et al.

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