Measuring and testing – Simulating operating condition – Marine
Patent
1989-07-24
1990-05-15
Myracle, Jerry W.
Measuring and testing
Simulating operating condition
Marine
180148, G01M 1900
Patent
active
049246968
ABSTRACT:
A noncontacting automotive steering angle sensor involving the application of a two element magnetoresistive sensor to an otherwise conventional rack and pinion steering system. The rack is directly coupled to the steerable wheels, and the sensor is integrally mounted in a spring-loaded rack contacting mechanism (contact shoe) used to maintain a meshing engagement between the pinion and the rack. A variable permeability surface is formed on the surface of the rack along the travel path of the sensor such that axial movement of the rack differentially varies the magnetic flux density detected by each element of the sensor. A detector circuit comprising a bridge or simple voltage divider responsive to the differential resistances of the sensor elements develops an electrical signal indicative of the rack position.
REFERENCES:
patent: 4785901 (1988-11-01), Maeda
patent: 4793433 (1988-12-01), Emori et al.
Article entitled Magnetic-Field-Sensitive Semiconductor Position Sensors-Practical Application Circuits, pp. 7-10.
Brochure entitled Wearfree Control with Magnetoresistor Potentiometers from Siemens, pp. 1-6.
Article entitled Technical Data, published by Siemens Aktiengesellschaft, SB 018012.
Paper designated FP 412 L 160, The Differential Magneto Resistor.
Paper designated FP 414 L 300, Differential Magneto Resistor, pp. 1-2.
Copy of pages 45-46 from publication entitled Felplatten.
Goings Janet S.
Golebiewski Ronald T.
Karadsheh Sam M.
Schroeder Allen G.
Schroeder Thaddeus
General Motors Corporation
Myracle Jerry W.
Navarre Mark A.
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