Abstract
This paper focuses on the control system of tunnel automatic car washing machine and puts forward a control scheme of automatic car washing system based on PLC control. This design uses domestic Hexin PLC as the core for control and man-machine interaction through touch screen, so as to control and monitor the work of the system. Each switch button, infrared sensor, ultrasonic sensor and limit switch are input to PLC as output signal, and then PLC controls the operation of each working part. This PLC based control system is more reliable, and easy to implement, in the actual use of simple operation, and easy to maintain, and have a good market prospects.
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