Compact head, signal enhancing magnetostrictive transducer

Details Compact head, signal enhancing magnetostrictive transducer Compact head, signal enhancing magnetostrictive transducer

1989-09-11

1990-08-28

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324209, 73314, 333148, G01B 726, G01F 2330

Patent

active

049528734

ABSTRACT:
A displacement transducer utilizes a torsional strain waveguide having a magnetic member that is adjustable positioned along the length of the waveguide, when an electrical current pulse is passed along the waveguide and reaches the magnet torsional strain wave is created in the waveguide. The torsional strain wave will be reflected back toward a mounting end of the waveguide where a converter or sensor is positioned to sense the strain wave signal and convert it to an electrical output signal. The strain wave signals have signal lobes of a time period. A waveguide mounting block supports the waveguide at the mounting end and provides a reflection point for the torsional strain waves. The waveguide mounting block is on an opposite side of the signal sensor from the magnet. The mounting block is precisely positioned a distance from the signal sensor that is equal to distance traveled by the torsional strain wave in the waveguide during one-half of the signal lobe time period so that the reflected wave becomes an additive signal to the incoming torsional strain wave signals to provide a greater amplitude to the signal being received.

REFERENCES:
patent: 3898555 (1975-08-01), Tellerman
patent: 4028619 (1977-06-01), Edwards
patent: 4071818 (1978-01-01), Krisst
patent: 4305283 (1981-12-01), Redding
patent: 4510587 (1985-04-01), Schneider
patent: 4654590 (1987-03-01), Kitaura et al.
patent: 4678993 (1987-07-01), Vinnemann et al.
patent: 4721902 (1988-01-01), Tellerman
patent: 4803427 (1989-02-01), Mason et al.
patent: 4839590 (1989-06-01), Koski et al.

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