Magnetostrictive transmitter with improved piezoelectric sensor

Details Magnetostrictive transmitter with improved piezoelectric sensor Magnetostrictive transmitter with improved piezoelectric sensor

2006-09-08

2008-12-16

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240, C333S148000

Reexamination Certificate

active

07466124

ABSTRACT:
A magnetostrictive level sensing instrument is used for sensing level in a process vessel and comprises an elongate tube having a near end and a distal end. A magnet is selectively positionable proximate the tube responsive to level of the processed material. A magnetostrictive wire in the tube has first and second ends. The second end is operatively secured at the tube distal end. A pair of shear mode crystals are mounted proximate the tube near end. The crystals sandwich the magnetostrictive wire proximate the first end. A sensing circuit is operatively connected to the magnetostrictive wire and the pair of crystals for generating an electrical pulse on the magnetostrictive wire whereby a magnetic field produced by the magnet interacts with the electrical pulse to produce a torsional wave on the magnetostrictive wire sensed by the pair of crystals.

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patent: 2004/0060767 (2004-04-01), Nguyen et al.
patent: 2006/0198247 (2006-09-01), Purcell et al.

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