An explanation of thermal behaviour of thick film strain gauges
Yulan ZhengThick film Unit, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, UKJohn AtkinsonThick film Unit, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, UKRussell SionThick film Unit, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, UK
2003en
ABI
Abstract
Earlier study shows that resistor thickness of the thick film strain gauge can affect its temperature characteristic, which is usually a roughly parabolic curve. Thicker resistors tend to exhibit a higher positive temperature coefficient of resistance (TCR) and a lower T&min;, the temperature at which the TCR changes to zero in the curve. This paper presents a possible explanation of this observation based on an analysis of strain profiles and resistivity behaviour difference in resistors with different thicknesses subjected to temperature variation.
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