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Different calibration methods and advantages of torque sensors

Different calibration methods and advantages of torque sensors

(Summary description)The torque sensor is one of the most flexible and sensitive instruments in industrial automation applications, and the working accuracy of the torque sensor is generally quite high. Therefore, the calibration problem of our newly purchased torque sensor cannot be ignored. There are several methods of calibration, each of which has its own advantages.

Different calibration methods and advantages of torque sensors

(Summary description)The torque sensor is one of the most flexible and sensitive instruments in industrial automation applications, and the working accuracy of the torque sensor is generally quite high. Therefore, the calibration problem of our newly purchased torque sensor cannot be ignored. There are several methods of calibration, each of which has its own advantages.

Information

The torque sensor is one of the most flexible and sensitive instruments in industrial automation applications, and the working accuracy of the torque sensor is generally quite high. Therefore, the calibration problem of our newly purchased torque sensor cannot be ignored. There are several methods of calibration, each of which has its own advantages.

We can choose between different calibration methods, laboratory or test bench field calibration, calibration work, the same application used by the power test bench, always the measurement torque can be transferred to the application. Simple is to measure the torque transmission through a torque sensor left in the driveshaft system. That is, refer to the calibration of the torque transducer performed by the manufacturer's calibration equipment or by other calibration laboratories in the field. Therefore, all grade certificates can be applied according to the requirements of the PTB proof or the DKD proof test brief. However, when the torque sensor is used in a test bench, the local boundary conditions have a decisive influence on the measurement of the torque sensor on the test bench and generate further deviations. This deviation may be due to test watch components such as lathes or clutches. Certain factors, such as combination calibration, elastic material behavior of joints or bolts, can affect the deformation behavior of the driveshaft system, and thus the torque sensor itself, and therefore the measurement characteristics.

There are three advantages of test bench calibration: First, the difference between the installation state of the test bench and the installation state during calibration disappears. Second, recalibration saves time through quick implementation. Because there is no need to ship to all dismantling and external calibration laboratories. Thirdly, the application of the test bench is embodied as an integral measure, so its neat traceability is proven. Master the basic idea of ​​almost traceability of field calibration and master the accuracy requirements of calibration.

The torque sensor can also be calibrated with dynamic calibration. As a kind of dynamic correction in the narrow sense, you need to realize that the torque obtained when calibrating will change rapidly over time, in that dynamic with possible operating hours. For this purpose, the reference torque and the output of the sensor to be calibrated must be determined at the same time when the torque is continuously changing. For this reason, special attention must be paid to the simultaneity of the measurements.

Also, using the exact same amplifier type that is not suitable for the reference and calibration objects can affect the torque of the amplifier's rapidly changing signal. Signal differences may also be the result of different adjustments and different characteristics of the filters. The lever arm-mass-system cannot be used as a reference torque source.

Usually works with a torque reference transducer. Torque can also assume that rotational acceleration is calculated by the object's moment of inertia to a known mass. However, this connection makes sense to a certain extent, since the dynamic torque part cannot be completely ruled out when rotating. In the sense of the way the system moves, a distinction must be made between static or dynamic torque for calibration while rotating.

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