Study On The Asphalt Spraying Controller Of Synchronization Crushed Stone Seal Coat Machine Based On DSP

Based on the project of Synchronization Crushed Stone Seal Coat Machine which take the charge of Xi'an Road Machine Limited Company, this paper designed a asphalt spraying control system of synchronization crushed stone seal coat machine in detail.First of all, the basic function and constitute of the control system be studied in detail, the constitutes of a controller which based on digital signal processor (DSP) TMS320LF2407 had been put forward, used countermeasures of anti-jamming to enhance the stability of the controller, then, designed the hardware electric circuit schematic diagram and PCB diagram, finally, weld the circuit board and pass the debuging successfully.The paper introduced a logic conversion matrix table to simplified and solved the complicated process logic relation when the machine work, used the Capture Units, Full Compare Units and Analog-to-Digital Converter of DSP to finish the collection of analog & digital signal and the output of PWM signal, designed a increasing PID control arithmetic to control the asphalt pump to work at a accurate rotate speed.Moreover, the paper chose a touch screen named MT506TV which based on MODBUS protocol for HMI of the machine controller. MT506TV carries out the input of work parameter and monitor the machine's realtime status. The paper has studied the structure of MODBUS news, wrote a interface driver based on MODBUS protocol, solved the communicate between DSP and MT506TV, and adopted macroinstruction to realize the complicated calculate and logic control.During the period of debugging, this paper recorded and analyzed the variety of each parameter for system to work, perfected the software of controller gradually, and raised the credibility of the controller, finally, make the machine's quality satisfy a expect design.