Design and Operation Characteristic Analysis of CAN Bus Solenoid Valve Controller
It is difficult to expand the number of control points when PLC controls the solenoid valve in construction machinery,and the installation of the solenoid valve control line is complicated and the control signal attenuates because of the too long control wire harness,a CAN bus type solenoid valve controller based on STM32 single-chip microcomputer is designed,which has the functions of digital output,electric proportional output,voltage type analog output,CAN bus configuration,etc.The electrical hardware composition of the controller is introduced,and the measurement and control system of the solenoid valve controller is designed using LabVIEW software.It can collect electromagnetic valve current in real-time and use PID control algorithm to effectively improve the control accuracy of electrical proportional output.It has been verified that the current control accuracy of the controller is within±1％,which meets the expansion of PLC control points for electromagnetic valves and achieves precise control of engineering machinery PLC for electromagnetic valves with long installation distances.
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