Displacement detection sensor using magnetostriction

Details Displacement detection sensor using magnetostriction Displacement detection sensor using magnetostriction

1998-03-03

2000-07-11

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420712, 32420724, G01B 714, G01F 2330, H04R 1500, G01D 548

Patent

active

060878282

ABSTRACT:
A displacement detection sensor includes a wire having one end portion and a second end portion, extending along a direction such that the second end portion is connected to a fixed position; a magnet generating a magnetic field therefrom, movable along the wire such that the wire is always being placed in the magnetic field and producing a twist in the wire when a current is supplied to the wire after a displacement of the magnet from its original to rest positions; a receiving device for receiving an elastic wave traveling directly to one end portion of the wire which is caused by the twist in the wire, the receiving device having a current induced thereat; an analyzing device for calculating the displacement on the basis of a time point at which the current is applied to the wire, and another time point at which the current is induced at the receiving device; and a tension device positioned at one end side of the wire for giving tension to the wire.

REFERENCES:
patent: 4958332 (1990-09-01), Tellerman

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