The automatic batching system is based on the electronic weighing system which is composed of the original weighing module and weighing instrument, and completes the automatic control of the whole process of batching conveying and mixing from the exit of the bin to the exit of the mixer by means of fieldbus communication and the existing peripheral executive equipment. The dosing system displays and monitors the alarm prompts and interlocks of the whole system, and completes the man-machine dialogue of formula management, production data management, equipment operation status management and production command to meet the mixing requirements of production.

Cylinder scales for liquefied petroleum gas enterprises to design and manufacture a set of fully automated multi-species mixing dosage weighing of three integrated production lines. The dynamic weighing scale, through the CC-Link fieldbus, together with PLC, HMI/IPC seamlessly form a three-in-one metering and dosage system, in which the industrial computer is connected to the factory ERP/MIS through HUB and Ethernet TCP/IP. The whole dosage process is carried out in strict accordance with the selected recipe ratio and flow, and has multi-level alarm records, completes the mixing of different raw materials to feed and logistic control, realizes the integration of management and control, and optimizes the performance and efficiency of process control. The integration of management and control optimizes the performance and efficiency of process control.

The electronic weighbridge adopts Mitsubishi Electric's MELSEC-A2SHPLC as the main control with Mitsubishi GOT touch screen as the lower human-machine interface (HMI), and the metering control consists of CFW quantitative filling machine. The weighbridge is connected through CC-Link fieldbus to realize data acquisition and control to ensure the reliability and real-time of dosage. It has rich functions of process operation, monitoring, communication, alarm, management, trending, recording and man-machine dialog, and has strong diagnostic capability.

The automatic batching system ensures the real-time communication between the upper PC and PLC, directly collects the weight signal through the electronic weighing, and automatically controls the weighing. The operator input the feeding information (feeding type, weight, etc.) on the HMI of the upper computer through the keyboard or mouse, monitors the whole process of feeding control, and prints the feeding results and production reports. It is a practical and effective method to realize the integration of measurement, control and management in feeding process.

Weighing and mixing equipment to achieve the main and auxiliary batching machine two-stage control, each screw is driven by a motor; Two material level sensors; A speed sensor; A weighing sensor and a frequency converter. The switching quantity controls the running state of the motor, the input of the control end of the inverter is determined by the digital input of the PLC, and the high-frequency pulse is transferred by the inverter and transmitted to the spiral drive motor. The level sensor begins to detect whether the hopper contains material, and the speed of the motor is monitored by the speed sensor.

The mixing and feeding equipment adopts the regulating valve or changes the pressure of the issuing tank for dosage, and PID adjusts the weight value to the pressure of the dosage tank or the opening of the regulating valve. The standard proportional function and the proportional calculation of the weighing system are used to ensure the stability of the weighing performance. The given value is multiplied by a multiplier to calculate the target value of the dosage weight, which is given remotely as a control quantity, and the reciprocal is taken to calculate the weight of the discharged material by a multiplier, thus realizing interactive dosage.

The weighing of high-piled oil drum truck consists of an inverted drum truck, two high-precision weighing sensors and weighing display instruments. The electronic scale for oil drums is an integrated equipment specially designed for drum handling, stacking and weighing, which can realize the electric lifting and dumping of drum goods. The oil drums are clamped in the equipment with weighing clamps, and the load is transmitted to the weighing sensor through the scale body, and the weighing sensor converts the weight into corresponding mV-level electrical signals. The signal is pre-amplified, filtered and A/D converted. After the signal is processed by microprocessor (single chip microcomputer), the digital display part directly displays the weighing value.

The weighing and loading device is sent to the weighing area through the screw, and the weighing sensor outputs a voltage signal according to the pressure of the material, which is amplified to output a metering level signal, which is proportional to the weight of the material. Then the signal is sent to the upper computer interface, and converted into a weight signal, the weight value is displayed on the current PC, and is sent to the PLC, which will compare and calculate the given value of the proportioning set by the PC. This control quantity is transmitted to the frequency converter and the output value of the frequency converter is changed to complete the control of the speed. Adjust the dosage to the same as the set value to complete the dosing process.

Explosion-proof electronic scales integrated application data weighing management system, the use of mobile Internet, Internet of Things, big data and cloud computing and other related technologies and the establishment of the cloud service platform serving the whole process of production and sales. To create the whole process from product production, manufacturing environment, logistics and transportation, terminal sales and other regulatory embodiment. Adopting modular real-time monitoring instrument hardware and utilizing the powerful function of Programmable Logic Controller (PLC), it realizes full-automatic control of the production process of fluid back-channel packaging, "Weighing and measuring system monitoring", "Automatic control of stacking unit", "Recording and storing of production data", and "Networking with the upper computer for 485 or TCPIP communication and data transmission".