文章主要讨论对受控对象内的温度进行实时调整和维持。利用高速数据采集卡和信号隔离、调理电路组成现场数据采集系统,微机通过数据采集卡获取数据和输出数据,完成系统的实时监控和设置。控制过程中,通过PID算法和液氮压力调节等多种方式,实现降温速度的可调性以及目标温度的持恒性。 The article mainly discusses the real-time adjustment and maintenance of the temperature in the controlled object. Using high-speed data acquisition card and signal isolation, conditioning circuit composed of on-site data acquisition system, the computer through the data acquisition card to obtain data and output data to complete the system’s real-time monitoring and setting. In the control process, through the PID algorithm and liquid nitrogen pressure regulation and other means, to achieve the adjustable cooling rate and the target temperature of the constant.