Position measuring device employing primary and auxiliary magnet

Details Position measuring device employing primary and auxiliary magnet Position measuring device employing primary and auxiliary magnet

Filed on

1994-04-07

Date issued

1997-04-08

Examiner

O'Shea, Sandra L.

Patent Class

Electricity: measuring and testing

SubClass

Magnetic

SubSubClass

Displacement

Other Related Categories

338 32R, G01B 714, H01L 4302

Type

Patent

Status

active

Patent number

056191324

Description

ABSTRACT:
A magnetic measuring system having a scale and a scanning unit, the scanning unit having a plurality of magneto-resistive elements which are disposed at an angle .beta. with respect to the measuring direction. The scanning unit generates an auxiliary magnetic field which acts perpendicularly to the measuring direction so as to magnetically bias the magneto-resistive elements.

REFERENCES:
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patent: 4401944 (1983-08-01), Narimatsu et al.
patent: 4596950 (1986-06-01), Lienhard et al.
patent: 4649342 (1987-03-01), Nakamura
patent: 4725776 (1988-02-01), Onodera et al.
patent: 4754221 (1988-06-01), Ao et al.
patent: 4806860 (1989-02-01), Iijima et al.
patent: 5021736 (1991-06-01), Gonsalves et al.
patent: 5243280 (1993-09-01), Kusumi
Reuber, C., "Jungere Ideen Fur Magneto-Sensoren", Messen Prufer Automatisieren, Jul./Aug. 1985, pp. 345-355.
Reiniger, Gunter, "Drehwinkelmessung mit Magnetfeldsensoren," Elektronik, Nov. 14, 1986, pp. 129-136.
Nelson, T.J. et al., "Shear-Sensitive Magnetoresistive Robotic Tactile Sensor," 1986 Digests of Intermage '86 International Magnetics Conference Apr. 14-17, one page.
Patent Abstracts of Japan, Publication No. JP 56122912, published Sep. 26, 1981, one page.

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