Torque sensor is mainly used to measure all kinds of torque, speed and mechanical efficiency. It will change the torque into electrical signals. Its accuracy is related to the accuracy of the test system. Its main characteristic lies in that it can measure both static torque and rotational torque, namely dynamic torque. Let's have a brief understanding of the commonly used torque sensors.

Non-contact torque sensor is also a dynamic torque sensor, also called torque sensor, torque speed sensor, rotary torque sensor and so on. Its input shaft and output shaft are connected by the torsion bar, input shaft spline, output shaft. When the torsion bar is subjected to the action of the torque, the relative position of the spline and keyway is changed.This process causes the intensity of the magnetic sensation on the spline to change into a voltage signal through the coil. Non-contact torque sensor is characterized by long life, high reliability, not easy to wear, a smaller delay, less affected by the shaft.

Strain gauge torque sensor uses strain electric measurement technology. When the elastic shaft is subjected to a small deformation of torque, the resistance value of the bridge will change, and then the electrical signal changes. The characteristics of strain gauge torque sensor are high resolution, small error, large measurement range, low price.

Phase difference torsion sensor is a torsional angle phase difference sensor. Its characteristics are mainly to achieve the non-contact transmission of torque signal. The detection signal is digital signal, high speed. However, this torque sensor is not widely used because of its large size and unsatisfactory performance at low speed. In addition, high-performance wireless torque sensor is more commonly used, and it is combined with wireless communication technology to achieve wireless data transmission.

Torque sensor as a kind of measurement of various torque, speed and mechanical power precision measurement instrument, is mainly used in the motor, engine and other rotary power equipment detection. Torque sensors can use in engineering manufacturing industry, transportation industry, research institutes and other applications.