Electricity: measuring and testing – Magnetic – Displacement
Patent
1993-11-04
1995-12-05
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
73314, 310333, 310369, 32420724, 333148, G01B 714, G01F 2330, H03H 900
Patent
active
054732450
ABSTRACT:
An improved magnetostrictive wire based position transducer that has applications in both liquid level measuring systems and in position indicating systems. A cylindrically structured and circularly polarized piezoelectric element directly measures the torsional acoustic waves in the magnetostrictive wire as they are received by the sensor. The cylindrical structure of the sensor eliminates many of the inadvertently detected acoustic and electrical pulses within the wire that are not indicative of the passage of the torsional wave of concern. The present system provides an improved sensor configuration which is selectively sensitive to torsional waves while being insensitive to vibrations in alternate planes. This improved piezoelectric sensor in combination with the electrical configuration allows placement of the magnetostrictive wire apart from the liquid whose level is being measured or from the indicator whose position is of concern. The system provides a means for transmitting the liquid level within a container to a sensor column outside of the container in a manner that improves access, maintenance, calibration, and installation. In the preferred embodiment, each of the above improvements is provided in a system that incorporates an instrumentation loop powered microprocessor based transmitter with low current requirements and increased sensitivity.
REFERENCES:
patent: 2334593 (1943-11-01), Wyckoff
patent: 2474693 (1949-06-01), Rowe
patent: 2838696 (1958-06-01), Thurston
patent: 3154946 (1964-11-01), Ordorica et al.
patent: 3208281 (1965-09-01), Kalmus et al.
patent: 3225312 (1965-12-01), Tellerman
patent: 3286190 (1966-11-01), Hare
patent: 3290649 (1966-12-01), Whitehouse
patent: 3372592 (1968-03-01), Gravert
patent: 3492667 (1970-01-01), Gratian
patent: 3566239 (1971-02-01), Taniguchi
patent: 3678750 (1972-07-01), DiNoia et al.
patent: 3898555 (1975-08-01), Tellerman
patent: 3982144 (1976-09-01), Rogers et al.
patent: 4006637 (1977-02-01), Kinosita
patent: 4028619 (1977-06-01), Edwards
patent: 4071818 (1978-01-01), Krisst
patent: 4158964 (1979-06-01), McCrea et al.
patent: 4238844 (1980-12-01), Ueda et al.
patent: 4305283 (1981-12-01), Redding
patent: 4344068 (1982-08-01), Thompson et al.
patent: 4510587 (1985-04-01), Schneider
patent: 4651044 (1987-03-01), Kompanek
patent: 4652786 (1987-03-01), Mishiro
patent: 4678993 (1987-07-01), Vinnemann et al.
patent: 4709210 (1987-11-01), Pond
patent: 4803427 (1989-02-01), Mason et al.
patent: 4839590 (1989-06-01), Koski et al.
patent: 4943773 (1990-07-01), Koski et al.
patent: 5043685 (1991-08-01), Nyce
patent: 5049776 (1991-09-01), Ogawa
patent: 5070485 (1991-12-01), Nyce
patent: 5196791 (1993-03-01), Dumais
MTS Systems, Corp., "MTS Level Plus Tank Gauging Systems for Small to Medium Tank Farms", Feb. 1994.
Harper Tony W.
Matherne J. Marion
Miller, Jr. Edward J.
Silvus, Jr. Howard S.
K-Tek Corporation
Strecker Gerard R.
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