【摘要】 液压油作为液压系统的工作介质,对液压油的温度控制是使液压系统稳定运行的重要手段。通过温度传感器实时采集温度数据,并存储在PLC的储存区,应用OPC技术实现西门子S7-200系列PLC与上位机的通信,通过VB编写OPC客户端程序和PID控制算法显示控制曲线并输出控制量,控制液压系统加热器和冷却器的启停,使油液温度达到系统设定的温度。试验系统即能实现对温度的自动控制,又能显示控制曲线,满足试验要求的高效性、稳定性和可互操作性,满足了工业需求。更多还原

【Abstract】 The temperature sensor could collect the real-time data of temperature and store it in the storage area of PLC.The OPC technology is applied to achieve the communication between Siemens S7-200 series PLC and PC,OPC client program and PID control algorithm could be written by VB for the control curve and the volume of output control,and then control the heater and cooler of hydraulic system,in order to let the oil temperature reaches the system’s set temperature.The system is not only able to achieve automatic control of temperature,but also show the control curves,the efficiency,stability and interoperability satisfy the Test requirements.更多还原