Mechatronic Systems Engineering 2201A/B Lecture Notes - Lecture 14: Strain Gauge
29 Dec 2019
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Strain: measure of deformation of a material, typically in response to mechanical stress (applied forces) Engineering strain is defined as a ratio of total deformation to the initial size of the. Strain gauge: device used to measure strain on an object. Strain gauge consists of a metal foil strip or a strip of semiconductor material which can be attached to a surface of the object like a postal stamp. When the object is deformed, the resistance of the strain gauge changes. : strain: : change of resistance, : nominal resistance, : coecient of proportionality called the gauge factor. When the strain gauge is stretched ( ), the resistance increased ( ) When the strain gauge is compressed ( ), its resistance decreased ( )
