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What is a torque sensor?

(Summary description)Torque sensors are divided into dynamic and static categories. Dynamic torque sensors may be referred to as torque sensors, torque speed sensors, non-contact torque sensors, rotational torque sensors, and the like. Torque sensors are torque detection for various rotating or non-rotating mechanical parts. Torque sensors convert physical changes in torque into accurate electrical signals. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, and have the advantages of high precision, fast frequency, good reliability, and long service life.

What is a torque sensor?

(Summary description)Torque sensors are divided into dynamic and static categories. Dynamic torque sensors may be referred to as torque sensors, torque speed sensors, non-contact torque sensors, rotational torque sensors, and the like. Torque sensors are torque detection for various rotating or non-rotating mechanical parts. Torque sensors convert physical changes in torque into accurate electrical signals. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, and have the advantages of high precision, fast frequency, good reliability, and long service life.

Information

Torque sensors are divided into dynamic and static categories. Dynamic torque sensors may be referred to as torque sensors, torque speed sensors, non-contact torque sensors, rotational torque sensors, and the like. Torque sensors are torque detection for various rotating or non-rotating mechanical parts. Torque sensors convert physical changes in torque into accurate electrical signals. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, and have the advantages of high precision, fast frequency, good reliability, and long service life.

The torque sensor is a parameter involved in the rotating power system. In order to detect the rotating torque, a large number of torsion angle phase difference sensors are used. The sensor is equipped with two sets of gears with exactly the same number of teeth, shapes and installation angles at both ends of the elastic shaft, and a proximity (magnetic or optical) sensor is installed outside the gears respectively. When the elastic shaft rotates, these two sets of sensors can measure the two sets of pulse waves, compare the difference between the two sets of pulse waves before and after, and calculate the amount of torque received by the elastic bearing. The advantage of this method is that the non-contact transmission of the torque signal is realized, and the detection signal is a digital signal. Disadvantages: bulky, not easy to install, the front and rear edges of the pulse wave are slow when the speed is low, and the low-speed performance is not good.

The more mature test method of torque test is strain electrical measurement technology, which has the advantages of high precision, fast frequency, good stability and long life. Special torsional strain gages are attached as strain glue to the measured elastic axis and form a strain bridge. Provide working power for the strain bridge, can test the torsional electrical signal of the elastic shaft. This is the default torque sensor mode. However, in the rotary power transmission system, the problem is how to reliably transmit the leg pressure input of the variable leg of the rotating body and the detected signal output of the variable leg between the rotating part and the stop part. The common method is to use conductive slip rings.

The conductive slip ring is in frictional contact, so wear and heat are inevitable, which limits the rotational speed of the rotating shaft and the life of the conductive slip ring. In addition, due to unreliable contact, signal fluctuation, large measurement error or measurement failure. In order to overcome the shortcomings of conductive slip rings, another method is to use wireless telemetry: amplify the torque deformation signal on the rotating shaft and convert V/F into a frequency signal. Through the wireless transmission method for carrier modulation, it is possible to transmit off-axis from the rotating shaft, and then use the radio reception method to obtain the torsional signal of the rotating shaft. The energy supply for the rotating shaft is a battery fixed to the rotating shaft. This method is a telemetry torque meter.

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