Learn The Torque Sensor Classification

We also have some understanding of the definition of the torque sensor. Because this sensor is rare in life, you should know more about it. Maybe you have a lot of questions about the torque sensor. Here are some details on this issue. Introduction, let people have a deeper understanding of the relevant content of torque sensors. If you use it in life, you will also know what is going on, then what is the content of torque sensor classification.

The torque sensor is a sensor that detects the torsional moment on various rotating or non-rotating mechanical parts. The torque sensor converts physical changes in torque into precise electrical signals. A sensor that uses a torsion shaft to convert torque into torsional stress or torsion angle, and then into an electrical signal that has a certain relationship with the torque. Twisted shafts include solid shafts, hollow shafts, and rectangular shafts. According to different working principles, torsional stress type torque sensors can be divided into resistance strain type and piezomagnetic type; torsional angle type torque sensors can be divided into vibrating wire type, photoelectric type and phase difference type.

Resistance Strain Torque Sensor
This sensor has a simple structure and is easy to manufacture, but because of the use of conductive slip rings, the vibration frequency is low, which is not suitable for high-speed rotating bodies and occasions with large torsional shaft vibration.

Photoelectric torque sensor
It consists of a twisted shaft and two grating disks (Figure 2). There are equal numbers of radial black spots on the two grating disks. When the torsion shaft is subjected to torque, the torsion angle is deformed. The grating disks 1 and 2 are different by an angle to form a light-transmitting port. The photoelectric element then has a width-adjusting pulse output. The greater the width of the photocurrent pulse. The average pulse current is proportional to the torque. This sensor is non-contact, but the light source must be regulated to supply power.

Piezomagnetic torque sensor
Its torsion shaft is made of ferromagnetic material. When the torque is applied, directional stress is generated in the shaft, and magnetic anisotropy occurs, that is, the magnetic resistance decreases under the tensile stress; and the magnetic resistance increases under the compressive stress. Big. This sensor has no conductive slip ring and is a non-contact measurement. It has the advantages of high reliability, ruggedness, high output voltage, and insensitivity to temperature and interference.

Vibrating wire type torque sensor
It uses the vibrating wire sensitive torsion angle to measure the torque (see vibrating wire sensor). It is characterized by the use of frequency signal transmission and good anti-interference performance.

Phase difference type torsion sensor
It consists of two gears with a twisted shaft and a pair of magnetoresistive pulse generators. A detector consisting of a coil and a magnetic steel is mounted above the tooth top of each gear. When the torsion shaft is twisted, a phase difference occurs between the output voltages of the two detectors, which corresponds to the magnitude of the transmitted torque. The corresponding torque value can be measured by measuring the phase difference. The characteristics of this sensor are high measurement accuracy, non-contact measurement, good stability, direct reading of torque value with digital, easy recording and control, and simple structure.

Through the above classification of torque sensors, everyone knows a lot about this knowledge. In fact, torque sensors are used on many machines, and they are widely used. If there is a fault, you need to understand where it is. When a problem arises, it is not a classification. To analyze the type of problem in detail, you should analyze the problem in detail. Knowing more about the torque sensor is good for future life and work. .