The weighing, feeding and mixing system adopts the measurement method of a screw scale. The screw scale is connected to a double-screw Feeder on top. The screw scale operates at a constant speed, and the screw speed of the double-screw feeder is regulated and controlled by variable frequency speed regulation to adjust the material flow rate. When the system enters the working state, the screw scale conveys the material from the double-screw feeder and detects the weight through the load cell. The speed sensor installed at the end simultaneously conducts speed detection. The weight signal and speed signal to be detected are sent to the weighing instrument together. The weight of the material in the screw is detected by the weighing module and input into the accumulator. The frequency converter detects the motor speed and inputs the speed information into the accumulator. The integrator processes the received screw speed signal and weight signal to obtain the cumulative amount and time-of-use flow rate of the material. When the flow setting value changes, the speed of the main drive motor is adjusted by the frequency converter to achieve quantitative feeding. Only the speed of the screw changes, while the material load on the screw remains stable. As soon as the speed of the reduction motor changes, the speed of the screw changes accordingly, and the feeding amount changes immediately, ensuring precise batching control.

The feeding system can meet users' various requirements. It has complete operation and alarm records, and all data can be queried and printed online. Moreover, it has expanded auxiliary functions such as channel switching and automatic shift conversion. Complete database and reporting functions. This Weighing system has relatively complete data recording and statistical reporting functions, meeting the production management needs of enterprises. Various reports include: Shift operation reports: including the start and end times of each shift's operation, control target values set according to the formula, operation data of each scale, batching output, and average hourly output of the reaction vessel, etc. Daily and monthly reports: The content is the same as above, and statistics can also be conducted by shift. Cumulative statistical report: The single scale and cumulative output within the specified start and end dates and times, as well as the statistics and proportioning by material classification. Alarm record report: It includes alarm classification statistics, alarm frequency and alarm waiting time, that is, the cumulative time from when the microcomputer issues an alarm to when the operator makes a keyboard response.

Modifying the formula, querying and printing reports can all be done online. The operator can modify or re-enter the formula in use online. After confirmation, the system will run according to the new formula. All the above-mentioned types of reports can be queried and printed online without having to exit the control operation process. The online query also includes items such as the dynamic compensation coefficients of each scale, which is convenient for operators to grasp the operation status of the system.

Diverse mathematical calculation methods. This weighing system program has been improved to offer three different mathematical calculation methods between AD sampling voltage and weight for users to choose from. "Linear regression" can effectively overcome the random errors caused by external factors such as stirring during the calibration process of the weighing module, making the setting results more adaptable. "Curve fitting" is particularly effective in correcting the nonlinearity of sensors and can be selected based on different situations.

For the control channel of the continuous PID regulation mode, the system also allows it to be set to calculate the conveyor load by the "absorption value method", and then this channel can be equipped with a nuclear scale for measurement. The multi-functional feature of this Batching system is most fully demonstrated here to meet the special needs of users. After changing the calculation method, it can be run directly without recalibration.

The flexible channel switching function of the batching control system enables users to call the "Scale Group Definition" sub-menu operation function at any time when A fault occurs in A certain A/D, D/A analog channel or D/O switch output channel in use. They can simply modify the faulty channel to a backup channel number and switch its hardware connection line to the corresponding terminal. The system can immediately resume operation. This function is particularly convenient and fast for handling faults when problems occur in individual channels of the electrical vibration trigger board or the microcomputer I/O board card.