Automatic force value calibration system and method for test machines

Abstract

The invention belongs to the technical field of force value calibration for test machines, and specifically relates to an automatic force value calibration system and method for test machines. The system includes a motor control unit, a standard force sensor, an intelligent unit, a data collection unit and a standard force measuring instrument. The standard force measuring instrument is connectedwith the standard force sensor to obtain and display the actual force value of a test machine measured by the standard force sensor. The data collection unit used for collecting the actual force valueof the test machine in real time and receiving the indication value of the standard force measuring instrument is connected with the intelligent unit, the motor control unit and the standard force measuring instrument. The intelligent unit displays the force value of the test machine and the indication value of the standard force measuring instrument and the difference therebetween. The data collection unit controls the operation of the motor control unit according to the difference between the force value of the test machine and the indication value of the standard force measuring instrument, which ultimately makes the error value between the two sets of data within a certain range. The force value of a test machine can be calibrated automatically.

Description

technical field [0001] The invention belongs to the technical field of test machine force value calibration, and in particular relates to a test machine force value automatic calibration system and method. Background technique [0002] The testing machine is an instrument for testing the mechanical properties of materials. Its principle is to clamp the sample between the two beams of the testing machine through the clamping device, provide power through a power source such as a motor, and drive the beam to move relative to it. The sample is pulled off, so as to test the force value and deformation change of the sample during the stretching process. The accuracy of the force value parameter will directly feel the accuracy of the test result, so the accuracy of the force value parameter is the one that affects the test. An important indicator of machine performance. [0003] The testing machine is mainly composed of the following parts: power source, beam, clamping part, tran...

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Problems solved by technology

[0005] In the prior art, the force value calibration of the testing machine is carried out manually. The manual method needs to read the results through the observation of human eyes and manually change the running speed of the beam of the testing machine. The operation of different people may be different. Different results will be obtained, which will inevitably bring human errors. The manual calibration method requires manual operation, which is time-consuming and laborious, and the calibration efficiency is not high. The testing machine equipped with a computer automatic calibration system has not been reported so far.

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