What physical principle underlies the operation of a strain gauge used in pressure sensors?
Answer
Its electrical resistance changes when subjected to mechanical strain
The strain gauge represents a specific type of pressure sensor utilizing principles of electrical change in response to physical deformation. When pressure is applied to the apparatus containing the sensor, the material experiences mechanical strain. The defining characteristic of the strain gauge is that this physical strain directly translates into a measurable variation in its electrical resistance. This conversion mechanism allows for the continuous translation of fluctuating pressure into an electrical signal that a control board can read, distinguishing it sharply from purely mechanical regulation methods.
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