NDLI: High temperature strain measurement with a resistance strain gage

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High temperature strain measurement with a resistance strain gage

Content Provider	Semantic Scholar
Author	Fichtel, Ed Mcdaniel, Amos D.
Copyright Year	1993
Abstract	ABSTRACT HIGH TEMPERATURE STRAIN MEASUREMENT WITH A RESISTANCE STRAIN GAGE How to successfully obtain data from a PdCr strain sen-sor Jih-Fen Lei Sverdrup Technology, Inc. Lewis Research Center Group Brook Park, Ohio 44142 Ed Fichtel and Amos McDaniel Pratt & Whitney -GESP West Palm Beach, Florida 33410 A PdCr based electrical resistance strain gage was demonstrated in the laboratory to be a viable sensor candidate for static strain measurement at high temperatures. However, difficulties were encountered while transferring the sensor to field applications. This paper is therefore prepared for recognition and resolution of the problems likely to be encountered with PdCr strain gages in field applications. Errors caused by the measurement system. installation technique and lead wire attachment will be discussed. The limitations and some considerations related to the temperature compensation technique used for this gage will also be addressed. INTRODUCTION A PdCr/Pt dual-element temperature-compensated strain gage was developed at NASA Lewis Research Center to meet the urgent need of measuring static strain at elevated temperatures. In applications such as advanced gas turbine engine and hypersonic vehicle ground tests, a sensor is required to operate at temperatures much higher than the present static strain gage technology can provide. Previous results obtained in the laboratory from this newly developed PdCr based gage suggested that the gage factor and the apparent strain of this gage were not very temperature sensitive. The apparent strain was not only small (within 1200 microstrain,
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940014841.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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