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针对某些热加工过程中温度控制范围大、精度高的要求,设计并实现了热加工智能温度控制系统。设计了桥式断偶保护装置保证温度控制的安全可靠;利用改进的数字PID算法提高了温控精度和系统稳定性;提出了恒速升温的方法提高升温线性度。现场实验结果表明:本温控系统检测和控制范围达0~1500℃,精度达±0.3℃,系统超调小于0.5%,实现了热加工过程中温度大范围变化时的高精度控制要求。
For some thermal processing temperature control range, high precision requirements, design and implementation of thermal processing intelligent temperature control system. The bridge broken protection device is designed to ensure the safety and reliability of temperature control. The improved digital PID algorithm is used to improve the temperature control accuracy and system stability. The method of constant temperature increase is proposed to improve the linearity of temperature rise. The field test results show that the temperature control system has a detection and control range of 0-1500 ℃, an accuracy of ± 0.3 ℃ and an overshoot of less than 0.5%. The high-precision control of the temperature range during thermal processing is achieved.