The feeding system mainly realizes the automatic control of the whole system through the Electronic scale, and mainly completes the functions of automatic feeding, discharging, transporting, mixing and stirring of materials. Adopted the industrial control machine batching centralized control mode, is by a host and more than one slave machine through the network connection, the host will control the task to each slave machine to complete. Collective control of dosage through the pressure weighing module to pick up the weight, and pick up the weight of the signal amplification, filtering, into the A/D converter for analog to digital conversion, and then sent to the microcontroller for signal analysis, processing, and the results of the RS232C communication serial port output to the industrial control, and at the same time, according to the results of the signal to make the appropriate response and perform the corresponding operation.

Feeding system based on PC and accurate quantitative dosage is a technical equipment integrating machine, electricity, signal processing and dosage, the electrical part is mainly composed of load cell, weighing instrument, programmable controller (PLC), frequency converter, industrial control machine and printer. In the dynamic weighing process, it accepts the weight signal from the weighing module on the quantitative weighing hopper. When the weight of the material in the hopper reaches the set value, it outputs I/O quantitative signal to PLC, which collects the quantitative output signal from the weighing display instrument, and controls the output frequency of each frequency converter through PLC, so as to control the quantity of coarse and fine material of the corresponding vibrating Feeder and the opening and closing of the material door of each weighing hopper. The industrial computer communicates with the weighing instrument through RS232 interface and displays the obtained weighing data of each scale on the monitoring screen, so that the user can adjust the formula on the panel of the weighing instrument or on the operating interface of the industrial computer.

The dosing process and control requirements include feeding, material transportation, mixing and discharging. Each raw material store has a complete feeding system and a discharging system that do not interfere with each other. Prior to batching start-up, staff need to establish the raw material recipe and material proportioning program. When the dosing starts, the feeding system will feed the material according to the set program, and the feeding is finished. When the raw material kettle is discharging, the material is discharged by detecting whether the material flow reaches the set value, and when the material reaches the set value, the discharging valve will be closed to complete the discharging. After the process is completed, the material is transported to the corresponding intermediate kettle through the conveyor belt. After transportation, the material is mixed and stirred in the intermediate kettle. After mixing in the intermediate kettle, the material reaches the conveyor belt through the discharge valve and enters the mixing kettle through the conveyor belt. At the end of the step, the material reaches the mixing kettle and starts mixing and stirring. After mixing, the unloading system is activated and the material starts to be unloaded through the unloading valve.