The first is the force sensor of the tensile testing machine . Because the quality of the sensor determines the accuracy of the testing machine and the stability of the measuring force. Currently, the small force value of the sensor for the tensile machine on the market generally uses the S-type sensor. For the sensor, the inside of the sensor is generally a strain gauge. If the accuracy of the strain gauge is not high or the rubber used for fixing the strain gauge is not good enough, or the material of the sensor is not good, the accuracy and service life of the sensor will be affected.
The second is the ball screw that drives the movement of the sensor . If the screw has a gap, the test data will be tested in the future, and the maximum deformation and elongation after the test will be directly affected.
Once again, it is the transmission system of the tensile testing machine. At present, some of the tensioning machine transmission systems on the market use reducers, and some use ordinary belts. The main drawbacks of these two transmission methods are: the former requires regular lubrication, and the latter ensures The synchronization of the transmission can not affect the test results.
Once again, the power source (motor) of the tensile testing machine is also called the motor . At present, some tensile machines on the market use ordinary three-phase motors or variable frequency motors. This type of motor uses analog signal control, slow control response, inaccurate positioning, and general speed regulation. The range is narrow, there is no high speed at high speed or low speed, and there is no high speed, and the speed control is not accurate. Like full digital pulse control, wide speed range, accurate control positioning, fast response, 0 can ensure accurate control of full-scale speed, long service life, up to several decades, and no maintenance.
Finally, the measurement and control system (that is, software and hardware) of the tensile testing machine . At present, the measurement and control system of most rally machines on the market adopts 8-bit single-chip microcomputer control, the sampling rate is low, and the anti-interference ability is poor, and the other is the AD converter. If the number of bits in the AD converter is also low resolution. Then the measurement will not be accurate.
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