The automatic feeding system (e.g. dosing container with weighing device) reads the weight value at regular intervals, and the difference between the two weights is used to calculate the reduction per time unit (instantaneous flow rate). The weighing controller compares the actual measured value with the preset flow rate value, and at the same time controls the rotational speed of the auger feeder to regulate the feeding volume. When the weight of the material in the hopper reaches the minimum set value, the charging valve will be opened automatically to carry out the periodic charging operation. In order to ensure the correctness of the weighing results, an appropriate filter can be selected to filter the weighing signals during the measurement process.

The human-machine interface of the feeding system is developed based on the operating system, which can meet the requirements of monitoring and controlling the production process as well as archiving and processing the production data. The user interface drawn by WinCC is simple and easy to operate with a good human-machine interface, which can dynamically display the operation status of various equipment on the site and the various parameters of the dosage operation. The operator can also flexibly control the starting and stopping of the field equipment and change the operating parameters of the dosage according to the needs.

Semi-automatic batching system can complete the required control tasks by communicating with each slave machine, and it should also have the functions of real-time display of working conditions, formula optimization and management consulting, etc. The data between the host and each slave machine can be used as the data source of the batching system. The data exchange between the host and the slaves and the real-time display module for the control of the slaves are realized. The host issues cycle commands to the slaves, enters into the dosage cycle process, receives the working condition information from the slaves in turn. Real-time dynamic display, and according to the corresponding control program to send control commands to each slave.

The automatic feeding system introduces advanced industrial control computer machine and PLC and DCS system, adopting decentralization, networking and intelligence to ensure the reliability and long-term stability of dosage. Adopting transfer pump to realize liquid dosage with kettle as the control unit, each kettle is set up accordingly to set the recipe boundary for different recipe feeding and conveying, which can flexibly cope with the demand of different recipes for different production batches of tasks.

The stirring weighing system uses inverter and PID closed-loop operation process to adjust the speed of the driving motor, start real-time weighing and measurement, and the central processor calculates the real-time weight and cumulative weight. All auxiliary materials are mixed and measured simultaneously in proportion and added according to the process requirements of the formula. There is a deviation between the set weight and the actual weight, the regulator compares the deviation between the set value and the actual weight according to the control requirements of the proportioner, and changes the output signal through PID adjustment to control the speed adjustment of the inverter to the conveying motor, so as to achieve weight control.

The hybrid weighing system consists of a weighing instrument connected to the CAN bus by a control module. The data acquisition module continuously collects the analog voltage signals from the sensor, converts them into digital signals through the internal amplification A/D conversion, and transmits the digital signals through the communication sub-module to the CAN bus for reception and processing by the corresponding display and control module on the CAN bus to complete the dosage and satisfy the needs of weighing. The data acquisition module consists of signal acquisition and processing sub-module, communication sub-module and power supply circuit. It receives the information sent by the sensor data acquisition module through CAN bus, converts it into weight value, and then displays the weight and sends the corresponding control information through the processing of the main program.

Automatic feeding machine is a weighing and mixing equipment with high efficiency, high uniformity, high loading coefficient, low energy consumption, low pollution and low crushing; its unique double-screw belt design enables the materials to be mixed uniformly in a shorter period of time; it has a wide range of application, not only for powder and powder mixing, but also for powder and liquid mixing and blending. A centralized control console is set up in the production site, the dynamic weighing instrument is installed on the console, the load cell installed in the lower part of the tank support leg is connected to the weighing instrument, the real-time data is uploaded from the weighing instrument through the communication line to the control center's ICM, and the formula and the control commands are downloaded from the ICM of the control center through the communication line to the instrument and the PLC controller.

In order to ensure the weighing speed and weighing accuracy, the automatic feeding system adopts real-time weighing, and all the feeding machines realize two levels of feeding speed, fast and slow. Weighing is done in a fast way, and when the weighing value is close to the set value, it is done in a slow way until the set value is reached and the feeding is stopped. This weighing system adopts a micro-range weighing device to provide a weighing device for small amount of bulk materials, which integrates feeding, weighing and discharging automatically. The weighing part of the device is separated from the other parts during weighing, and the weigher is emptied after each weighing, which not only improves the weighing accuracy, but also saves cost and improves the time efficiency.

Automatic loading machine through the material tank through the weighing module measurement to join the liquid (or powder) and timed mixing, mixing is completed to open the material gate, the mixed material into the transition bin. The material in the transition bin and the resin weighed at the same time evenly into the matching material hopper lifter will be sent to the bin. Completion of the process site temperature, pressure, flow, such as real-time monitoring, recording of historical data, complete the record of production parameters, hand / automatic state, dosage state, protection state system in the form of sound and light alarm form of early warning, to ensure that the system in the fully automatic control mode of stable operation.