金属材料快速加热方法的研究与实现

针对热力模拟实验中金属材料快速加热系统,采用直接电阻加热方式,分析了加热速度的估算方法;为克服大电流所形成电磁场对温度测量的影响,采用每10ms周期短暂断电采集温度策略,利用同步电压实现触发采集,提出当采集点偏离断电区时的判断方法,并重新设置触发时间·介绍了智能控制在快速加热系统的应用·实践表明,快速加热系统在快速升温的同时,具有采集温度准确、控制精度高的特点·

Implementation of Rapid Heation for Metal Materials

A heating process with self-resistance was introduced in the rapid heating system for metal materials during the test of thermo-mechanical simulation. A formula was given first to estimate heating rate. To eliminate the errors of temperature measurement which was affected by an electromagnetic field induced from the high current, a special attention was paid to temperature measurement that they were done through an intermittent power-off procedure at intervals of 10 ms and utilizing synchronous voltages to collect testing data in triggering form. A criterion was proposed in case a measured point deviates from the power-off zone, with a triggering time reset. The application of intelligent control to rapid heating system is briefly described. The experiment results indicated that the rapid heating system is accurate in temperature measurement, and available to high-precision control.