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应变片粘结剂的固化、光弹试件的浇铸和固化等过程都需要电阻丝加热型烘箱严格按照给定的升温、保温和降温(不低于室温)折线进行精确的升温、保温和降温过程。烘箱自动控温系统根据PID调节的自动控制原理,并考虑到被控对象大惯性、大迟延的特点,采用Smith补偿提高系统的自动控制品质,实现了烘箱温度自动测控。运行结果表明,烘箱自动控温系统可靠性强,精度高,完全满足生产要求。
Strain gage binder curing, casting and curing of the photoelastic test pieces require resistance wire heating ovens in strict accordance with the given temperature, insulation and cooling (not less than room temperature) line for precise temperature, insulation and cooling process. According to the automatic control principle of PID regulation and taking into account the large inertia and large delay of the controlled object, Smith automatic control system improves the automatic control quality of the system and realizes the automatic temperature measurement and control of the oven. Operating results show that the oven automatic temperature control system reliability, high precision, fully meet the production requirements.