Rosin Measurement Of Automatic Packaging System

The Jinggu rosin factory annually produces rosin and turpentine 30,000 tons, it is the biggest rosin production base of China. The production has realized the automatic control, but the rosin packing still relies mainly on done by hand. It is unable to guarantee the precision of the rosin tare, this has affected the production efficiency in the very great degree, therefore carried on the automated transformation to this factory's rosin packing system to appear especially essential.The rosin liquid's dynamic weighing is the key to realizing automation to the rosin packing system, it is one of the difficult points too. This thesis embarks from the system dynamic equation, establishes the reasonable mathematical model of rosin weighing system.Dynamic error compensation is used to improve the accuracy of the system in the error processing aspect.Because in the system the rosin current capacity is not steady, it is difficult to determine the cut advance time, this article adopts the fuzzy PID control algorithm to control the cut advance time.The rosin assumes the solid state in the normal temperature and not the electric conduction, it is extremely easy to volatilize in the high temperature, so cannot use conventional solenoid valve as the cut installment, this paper designs a mechanical drive to take the cut installment.In the hardware aspect, we only use a displacement sensor to detect the parameter, saving the cost and decreasing the error caused by the components.Finally, experiments are carried out to verify the feasibility of this system, the experimental results have indicated that, the control precision can satisfy the system precision request.