3.1 Working principle 3.2 Temperature error and compensation of resistance strain gauge 3.3 Measurement circuit of resistance strain gauge 3.4 Application of strain sensor Strain The phenomenon that an object deforms under external pressure or tension Elastic strain When the external force is removed, the object can completely restore its size and shape. Elastic element Object with elastic strain characteristics Overview of strain sensor: It is a sensor that uses resistance strain gauge to convert strain into resistance value change Working principle: When the physical quantity to be measured acts on the elastic element, the elastic element deforms under the action of force, torque or pressure, and produces corresponding strain or displacement, which is then transmitted to the strain gauge connected to it, causing the resistance value of the strain gauge to change, and is converted into electrical output through the measurement circuit. The amount of electrical output reflects the size of the measured quantity. Structure: The strain sensor is composed of a resistance strain gauge attached to an elastic element Application: Widely used in the measurement of parameters such as force, torque, pressure, acceleration, and weight
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