Angle sensor including angularly spaced sensor units

Details Angle sensor including angularly spaced sensor units Angle sensor including angularly spaced sensor units

1995-03-08

1997-02-11

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420725, 324252, G01B 730, G01R 3309, G01D 514

Patent

active

056024711

ABSTRACT:
An angle sensor includes at least two angularly spaced sensor units which measure in a contactless manner and whose sensor voltages are similar but angularly shifted sinusoidal functions (sensor characteristic) of the angle .alpha. to be measured relative to a rotatable element and a processing circuit forms an angle sensor voltage which is a measure of the angle .alpha.. Using limited analog circuitry, a wide angular range is obtained and also a monotonously increasing angle sensor voltage which is dependent as linearly as possible on the angle to be measured, in that the sensor voltages are direct voltages which are constant in time. The processing circuit includes limiter circuits (15) whose input receives the sensor voltages (UMA, UMB), and whose output voltages exhibit values (10, 11) which remain constant when a limit value of the sensor voltages is exceeded, and that the output voltages of the limiter circuits (15) are applied to the input of a summing circuit (16) in order to form the angle sensor voltage.

REFERENCES:
patent: 4415856 (1983-11-01), Welles
patent: 4492922 (1985-01-01), Ohkubo
patent: 4616281 (1986-10-01), Nakamura
patent: 4791366 (1988-12-01), Suzuki et al.
patent: 5252919 (1993-10-01), Uemura
patent: 5486759 (1996-01-01), Seiler et al.
Mohammed S. Ghausi "Electronic Devices and Circuits - Discrete and Integrated" 1985, CBS College Publishing, New; York, p. 439.

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