Speed, direction, and acceleration sensor for a rotating shaft h

Details Speed, direction, and acceleration sensor for a rotating shaft h Speed, direction, and acceleration sensor for a rotating shaft h

1997-12-05

1999-11-02

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

32420725, 32420722, 341 6, 341 15, 340672, G01P 352, G01P 1300, G01B 715, G01B 730

Patent

active

059777656

ABSTRACT:
An apparatus is provided to determine the speed and direction of a rotating shaft, including a rotor with three circumferentially spaced teeth connected to the shaft. The spacing of the center of the second rotor tooth is wider than the spacing of the center of the first tooth and the spacing of the center of the third tooth is wider than the spacing of the center of the second tooth. A sensor detects the center of each tooth and produces a signal in response thereto. The signal is received by a computer. The computer determines the speed and direction of rotation of the shaft by determining a first time period to reach the center of the first tooth, a second time period to reach the center of the second tooth and a third time period to reach the center of the third tooth.

REFERENCES:
patent: 4142153 (1979-02-01), Smith
patent: 4774494 (1988-09-01), Extance et al.
patent: 5264789 (1993-11-01), Braun et al.
patent: 5371460 (1994-12-01), Coffman et al.
patent: 5523679 (1996-06-01), Kalb
Sales brochure "Custome Variable Reluctance Sensors", American Electronic Components, Inc., Elkhart, IN.

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