The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1993
Filed:
Sep. 05, 1991
Applicant:
Inventor:
Bob G Mahrenholz, Tullahoma, TN (US);
Assignee:
Sverdrup Technology, Inc., Arnold Air Force Station, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
73766 ; 324721 ;
Abstract
A dynamic strain measurement circuit includes a constant resistance conditioner. The constant resistance conditioner compensates for changes in lead wire resistance due to temperature. The conditioner includes adjustable resistance connected between a voltage supply and the strain gage. A potential difference is detected in the circuit and compared to a reference potential. Differences between the reference potential and the detected potential produce an error signal which is used to drive the control of the resistance value of the adjustable resistance in the measurement circuit.