Patent · US Expired

Resonant circuit for increasing variable reluctance sensor output

US6885186B2 · kind B2 · utility

1Cited by
4References
17Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMar 13, 2002
Grant dateApr 26, 2005
Priority date—
Expiry dateMay 29, 2023

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01P3/488
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.