Inductive position sensor

Details Inductive position sensor Inductive position sensor

2007-10-02

2007-10-02

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250

Reexamination Certificate

active

11102045

ABSTRACT:
An inductive position sensor for position sensing includes a transmitter coil and a receiver coil, the receiver coil generating a receiver signal when the transmitter coil is excited by an alternating current source. A moveable coupler element modifies the inductive coupling between the transmitter coil and the receiver coil so that the receiver signal is sensitive to the coupler element position. For example, the coupler element may rotate about a common central axis of the transmitter coil and receiving coil. In further examples, a reference coil is configured so that a provided reference signal is substantially insensitive to variations in the angular position of the coupler element. A ratio between the receiver signal and the reference signal is sensitive to the coupler element position, but substantially insensitive to common mode factors that influence the reference signal and receiver signal to a substantially equal degree.

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