Contact High Temperature Strain Automatic Calibration and Precision Compensation Technology

Zijian Jia, Wenrui Wang, Jiaming Zhang
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引用次数: 4

Abstract

In order to solve the problem of contact high temperature strain precision measure-ment, this paper established an automatic calibration device for high temperature strain gauges. The temperature of the high temperature furnace was automatically con-trolled by the temperature control device. The electric cylinder was driven by the servo motor to apply the load to the calibration beam. The output signal of the high temperature strain gauge, the thermocouple signal and the displacement signal of the grat-ing ruler were collected at the same time. The deformation measurement results obtained after temperature correction were used to calculate the theoretical mechanical strain, which were fed back to control the loading action to complete the automatic calibration process. Based on the above calibration device, the high temperature strain measurement accuracy correction software was developed to calibrate the high temperature strain gauge with multi-parameters, and the curves of sensitivity coefficient, thermal output, zero drift and creep characteristics with temperature were obtained, and a strain measurement accuracy compensation model was established. The high temperature strain measurement experiment was carried out to verify that the modified model can meet the requirements in each temperature range.
接触式高温应变自动校准及精度补偿技术
为了解决接触式高温应变精密测量的问题,本文建立了一种高温应变仪自动校准装置。高温炉的温度由温度控制装置自动控制。电动缸由伺服电机驱动,将负载施加到校准梁上。同时采集高温应变仪的输出信号、热电偶信号和光栅尺的位移信号。将温度校正后获得的变形测量结果用于计算理论机械应变,并将其反馈以控制加载动作,从而完成自动校准过程。基于上述校准装置,开发了高温应变测量精度校正软件,对多参数高温应变仪进行校准,得到了灵敏度系数、热输出、零漂移和蠕变特性随温度的曲线,并建立了应变测量精度补偿模型。通过高温应变测量实验验证了改进后的模型在各个温度范围内都能满足要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
8.70
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