Strain gauge
From Wikipedia, the free encyclopedia.
A strain gauge is a device used to measure deformation (strain) of an object. It usually consists of a flexible, easily-stretched backing material with a wire glued to it in a zig-zag pattern. As the object is deformed, the wire is stretched, causing its resistance to change. This resistance change, usually measured using a Wheatstone bridge circuit, can be used to calculate the exact amount of deformation.
