Tension Sensor Working Principle

The strain gauge inside the tension sensor is a resistance strain gauge. The working principle is:

The working principle of the metal resistance strain gauge is a phenomenon in which the strain resistance adsorbed on the base material changes with the mechanical deformation, which is commonly called the resistance strain effect. The resistance value of a metal conductor can be expressed by the following formula:

Ρ——resistivity of metal conductor (Ω?cm2/m)

S——cross-sectional area of the conductor (cm2)

L——the length of the conductor (m)

Taking wire strain resistance as an example, when the wire is subjected to an external force, its length and cross-sectional area will change. It can be easily seen from the above formula that the resistance value will change if the wire is subjected to an external force. When it is stretched, its length increases, and the cross-sectional area decreases, and the resistance value increases. When the wire is compressed by an external force, the length is decreased and the section is increased, and the resistance value is decreased. As long as the change in resistance is measured (usually the voltage across the measured resistance), the strain of the strained wire can be obtained.