J. M. Matherne
Engineering at Siegen Ln, Baton Rouge, LA
License number
Louisiana PE.0010362
Issued Date
Jul 7, 1966
Expiration Date
Mar 31, 2017
Category
Civil Engineer
Type
Electrical and Computer Engineer
Address
Address
8282 Siegen Ln SUITE B, Baton Rouge, LA 70810
Professional information
Magnetostrictive Linear Displacement Transmitter Having Improved Piezoelectric Sensor
US Patent:
5473245, Dec 5, 1995
Filed:
Nov 4, 1993
Appl. No.:
8/147028
Inventors:
Howard S. Silvus - San Antonio TX
Edward J. Miller - San Antonio TX
J. Marion Matherne - Baton Rouge LA
Tony W. Harper - Baton Rouge LA
Edward J. Miller - San Antonio TX
J. Marion Matherne - Baton Rouge LA
Tony W. Harper - Baton Rouge LA
Assignee:
K-Tek Corporation - Prairieville LA
International Classification:
G01B 714, G01F 2330, H03H 900
US Classification:
32420713
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.