Variable transformer position sensor

Details Variable transformer position sensor Variable transformer position sensor

1989-01-11

1993-06-01

Snow, Walter

Electricity: measuring and testing

Magnetic

Displacement

32420717, 34087031, G01B 714, H01F 2102, G08C 1906, G08C 1912

Patent

active

052163644

ABSTRACT:
A linear position sensor includes coextensively positioned primary and secondary windings, each having an elongated core and a coil radially spaced around the core. A cyclically varying signal is applied to the primary winding which develops a signal across the secondary winding due to transformer coupling. A coupling adjustment member varies the amount of transformer coupling and is longitudinally movable with respect to the winding assembly. The relative longitudinal positioning of the coupling member with respect to the winding assembly is determined by measuring the signal developed across the secondary winding. In one embodiment, the windings are similarly configured, are arranged side-by-side and spaced apart; the coupling adjustment member enhances the transformer coupling between the windings which are telescopingly received within the member. In another embodiment, one winding is concentrically positioned within the other and the coupling adjustment member disrupts the transformer coupling between the windings by being positionable in a gap between the windings. Embodiments are illustrated both for location internal to, and external of, a vehicle shock absorber.

REFERENCES:
patent: 2911632 (1959-11-01), Levine et al.
patent: 3001183 (1961-09-01), McKenney et al.
patent: 3020527 (1962-02-01), MacLaren
patent: 3030574 (1962-04-01), Nissenson
patent: 3181055 (1965-04-01), Bischof
patent: 3654549 (1972-04-01), Maurer et al.
patent: 3821652 (1974-06-01), Wiebe et al.
patent: 3890607 (1975-06-01), Pelenc et al.
patent: 3982189 (1976-09-01), Brooks et al.
patent: 3995222 (1976-11-01), Mitarai
patent: 4358762 (1982-11-01), Wolf et al.
patent: 4408159 (1983-10-01), Prox
patent: 4502006 (1985-02-01), Goodwin et al.
patent: 4658153 (1987-04-01), Brosh et al.
patent: 4663589 (1987-05-01), Fiori, Jr.
patent: 4665372 (1987-05-01), Schwartz
patent: 4742794 (1988-05-01), Hagstrom
patent: 4797614 (1989-01-01), Nelson
patent: 5036275 (1991-07-01), Munch et al.
E. J. Stefanides, Inductive Sensors Improve Automotive Position Sensing Design News, Oct. 3, 1988, 286-287.
Wells, Non-Contacting Sensors: An Update, Automative Engineering, vol. 96 No. 11, pp. 39-45.

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