Core Tip: Torque sensors are tests for the perception of torsional moments on various rotating or non-rotating mechanical components. The torque sensor converts the physical changes in torque into precise electrical signals. The torque sensor can be used in the manufacture of viscometers, electric (pneumatic, hydraulic) torque wrenches, which have the advantages of high precision, fast frequency response, good reliability and long life.
It is understood that the torque sensor is divided into two categories: dynamic and static. The dynamic torque sensor can also be called torque sensor, torque speed sensor, non-contact torque sensor, rotary torque sensor and so on. Torque sensors are tests for the perception of torsional moments on various rotating or non-rotating mechanical components. The torque sensor converts the physical changes in torque into precise electrical signals. The torque sensor can be used in the manufacture of viscometers, electric (pneumatic, hydraulic) torque wrenches, which have the advantages of high precision, fast frequency response, good reliability and long life. With the continuous improvement and development of the automatic control system, higher requirements are placed on the accuracy, reliability and response speed of the torque sensor. The hardware torque sensor is showing the following trends:
Sensors have evolved from invasive to non-invasive. In the past, most of the torque sensors were intrusive, that is, they must be used as part of the drive shaft, which limits its application range, and is generally used for laboratory and bench measurement. Nowadays, the snap-on strain-type torque sensor is a non-intrusive torque sensor. As long as the sensor is stuck on the shaft or mounted on the shaft, there is no need to disconnect the shaft system, which greatly increases the torque measured by the actual working conditions. Convenience. Further, vibrating wire sensors and magnetoelastic sensors are non-intrusive torque sensors.
Research on new torque sensors and improvements to classic torque sensors. With the discovery of new principles, new materials and the development and application of micromachining and micromachining technology, the transformation of traditional sensors is being promoted. The new magnetoelastic sensors and fiber optic torque sensors are simple in structure and convenient to use, and represent the new trend of torque sensors. The magnetoelectric phase difference sensor is a relatively mature sensor. It has been modified into a magnetoelectric sensor without an auxiliary motor, which not only reduces the weight, reduces the volume, reduces the cost, but also has good vibration resistance.
Research on micro torque measurement sensors. With the rapid development of household appliances, such as electric fans, micro-motors, sewing machines, razors, refrigerators, washing machines and even switches, the torque must be measured, and the torque measurement of g · cm level is urgently needed. The development of new sensors will become a solution. The key to this problem. In terms of signal transmission, the contact slip ring transmission has been used in the past. This type of transmission is easy to wear, needs to be cleaned frequently, is difficult to install, and is easy to introduce interference signals. Recently introduced sensors are generally contactless transmission.
It overcomes the shortcomings of contact transmission, such as inductive or telemetry. With the integration and multi-function of detection and transformation, the concept of transforming the transmission and then transforming the signal into the first detection transformation process, and then transmitting, this change has become possible. The intelligent and computerized torque measuring instrument is the mainstream of today's measuring instrument. The development and application of single-chip microcomputer and software have enabled signal detection, acquisition, comparison, correlation, digital filtering, inter-domain transformation, logic and function calculation, and program. Functions such as reference and feedback control are made possible by the instrument itself. The software extends the performance limitations of the fabric and makes the instrument intelligent.
It can adapt to the changes of the measured parameters from the selection range, automatic compensation, automatic correction, man-machine dialogue, self-seeking fault, and can easily interface with the bus to carry out multiple online communication and control. In the assembly of the torque sensor signal transmission and measuring instrument, the voice of the industrial torque meter development is getting higher and higher, and the previous torque measuring instrument is mostly used in the laboratory bench measurement. The requirements of the industrial torque meter must meet the demanding industrial application environment, that is, the reliability is high, the repeatability is good, the price is low, the machine is matched, the installation is convenient, but the precision is not high, and it is used as a guide to the production and protection of the machinery. An effective means of injury.
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Label: Application development of torque sensors
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