Linear position sensor having coaxial or parallel primary and se

Details Linear position sensor having coaxial or parallel primary and se Linear position sensor having coaxial or parallel primary and se

1991-07-29

1993-05-11

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420713, 32420722, 32420725, G01B 714, H01F 2102, G08C 1906, G08C 1912

Patent

active

052104907

ABSTRACT:
A position sensing device including two spaced conductive coils constituting a primary and secondary winding of a transformer. A coupling member is mounted to a moveable object such as an automobile steering mechanism and moves relative the primary and secondary windings. This movement adjusts or alters the transformer coupling between the primary and the secondary and produces a variable output signal which can be correlated through use of appropriate circuitry to the position of the moveable member. Two alternate designs are disclosed. In a first design, the transformer primary and secondary are disposed side-by-side and the coupling member slips over the primary and secondary for relative linear movement. In a second design, the primary and secondary are disposed one within the other and the coupling member fits within a gap between the primary and secondary. A control system for multiple position sensors includes circuitry for activating multiple sensors as well as monitoring return signals from multiple signals. Such a control system can interface other computers within the vehicle such as body control and engine control computers.

REFERENCES:
patent: 5036275 (1991-07-01), Munch et al.

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