LI Song, PAN Feng

 

(Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education),

 Jiangnan University, Wuxi 214122, China)

 

 

Abstract: Aiming at the low degree of the automation degree, ingredient process efficiency and ingredient accuracy of the mixed asphalt control system, the system technology procedures and the required functions was researched and the original control strategy and logic program was analyzed and summarized. A method was presented that used Siemens S7 300PLC as the controller to control all aspects of the system, logic program was used to accomplish the required functions of the control system. The ingredient process was analyzed and studied. A method was presented that applied a combination of secondary weighing and impulse correction to this system, so the efficient of ingredient process can be ensured, the technological requirements of ingredient accuracy also can be achieved,besides the stability of stone and asphalt stone ratios can be ensured.The results indicate that the functionality of the system can be fully realized and a promotion of up to 30% compare to the original.

 

Key words: control system; bituminous mixture agitation machine; blending process; impulse correction