基于热电偶的爆炸场温度补偿方法及其 LabVIEW 实现❋

摘要

During measuring transient high temperature of explosion field, aiming at the problem that the poor dy-namic characteristics of thermocouples results in a big dynamic error of test results, the traceable dynamic calibration sys-tem was used to perform dynamic calibration of thermocouples by selecting a high-power semiconductor laser as heat source, and its dynamic characteristics were analyzed. With the quantum-behaved particle swam optimization (QPSO) algorithm on MATLAB platform, a model of dynamic compensation filter is established, and the effectiveness of the dynamic compensa-tion was verified by experiment. Finally, the compensation values of thermocouple were displayed by LabVIEW, basing on the mixed programming of LabVIEW and MATLAB. The experiment results show that the compensated thermocouple has ideal dynamic response characteristics, and the temperature compensation of the explosion field is reliable.%在爆炸场瞬态高温测试过程中，由于热电偶的动态特性较差，使得测试结果存在较大动态误差。针对该问题，应用了以大功率激光器为热源的可溯源动态校准系统，对热电偶传感器进行动态校准，分析其动态特性；在此基础上，运用 MATLAB 和量子粒子群优化(QPSO)算法设计动态补偿滤波器，试验验证了动态补偿的有效性；通过 LabVIEW 与 MATLAB 混合编程，最终在 LabVIEW 平台上实现对热电偶输出的动态补偿。结果表明，补偿后的热电偶响应速度加快，爆炸场温度补偿结果可信。