Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Patent
1996-08-07
1998-07-14
Biegel, Ronald L
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
73763, 73777, G01L 1900, G01L 122
Patent
active
057807469
ABSTRACT:
A force sensor comprising a substrate, a conductive material providing an electrically discernible response to compressive stress disposed on the substrate, and a thermocouple disposed on the substrate proximate to the conductive material. A measurement processor is also described that includes first means for measuring electrical signals from the conductive material indicative of compressive stress, second means for measuring electrical signals from the thermocouple indicative of temperature in proximity to the conductive material, means for determining a temperature compensating factor derived from the electrical signals indicative of compressive stress and the electrical signals indicative of temperature, and means for determining a temperature compensated compressive stress value derived from the temperature compensating factor and the electrical signals indicative of compressive stress.
REFERENCES:
P.W. Bridgeman, The Physis of High Pressure, pp. 70-77, Bell and Sons, Ltd., London, 1958.
J.W. Kannel and T.A. Dow, "The Evolution of Surface Pressure and Temperature Measurement Techniques for Use in the Study of Lubrication in Metal Rolling," Journal of Lubrication Technology, pp. 611-616, Oct. 1974.
Terry L. Merriman, "Transducers and Techniques of Contact Pressure Measurement," undated.
D.D. Keough and J.Y. Wong, "Variation of the Shock Piezoresistance Coefficient of Manganin as a Function of Deformation," Journal of Applied Physics, vol. 41, No. 8, pp. 3508-3515, Jul. 1970.
G. Bosca, J. David, L. Allay, J.M. Darmon and Y. Victor, "Piezoresistivite du Manganin et de l'Ytterbium Deposes par Pulverization Cathodique," undated.
Soviet Union Patent No. 505915, issued May 13, 1976.
Biegel Ronald L
Fel-Pro Incorporated
Shurtz Steven P.
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