What is the working principle of the tension sensor?

The tension sensor is based on the principle that the elastic body (elastic element, sensitive beam) is elastically deformed under the action of external force, so that the resistance strain gauge (conversion element) stuck on its surface is also deformed. After the resistance strain gauge is deformed, its resistance value will change (increase or decrease), and then this resistance change will be converted into an electrical signal (voltage or current) through the corresponding measuring circuit, thus completing the process of converting external force into an electrical signal.

Considering the influence of strategic acceleration and air buoyancy at the place of use on the transformation, the performance indexes of the tension sensor mainly include linear error, lag error, repetitive error, creep, zero temperature characteristics and sensitivity temperature characteristics.

The advantages of the tension sensor are high precision, wide measurement scale, long service life, simple structure, good frequency response characteristics, working under harsh conditions, easy to realize miniaturization, integration and variety. Its disadvantages are large nonlinearity and weak output signal about large strain, but some compensation measures can be adopted. Therefore, it is widely used in automatic testing and control skills.