Mixing and feeding system uncertainties and internal and external interference as a whole for processing, the use of digital technology to compare and analyze it with the traditional PID controller, weighing controller to calculate the actual amount of feed, when the actual amount of feed to meet the feed set value to close the feed valve, from the whole process of action can be seen, the valve closure lag will inevitably lead to feeding error, the value of the error is about the lag time and the closure of the instantaneous volumetric flow rate, The error value is the product of lag time and instantaneous volume flow rate and fluid density at the time of closing, in which the lag time is all the time between the output of the valve closing signal from the weighing controller and the shut-off valve shutting down, "i.e., including the lag time of the relay's action and the shut-off valve's action lag time.

The automatic feeding system picks up the weight through the pressure weighing module, amplifies and filters the picked up weight signal, enters into the A/D converter for analog-to-digital conversion, and then sends it to the microcontroller to analyze and process the signal, and outputs the result to the industrial control through the RS232C communication serial port, and at the same time, makes the corresponding reaction and performs the corresponding operation according to the result of the signal.

The automatic feeding system realizes a historical record of all measurement points on the basis of real-time trends. Once you need to trace the past data information, open the historical trend page, click the right mouse button on the blank space below, and in the pop-up dialog box, you can select any curve you want. Through the "Set Parameters" button on the Historical Trend page, the curve can be displayed according to the time period specified by the user. Meanwhile, the events occurred during the operation can be displayed in real time and queried in the history alarm page, the query content includes: time, date and time of alarm occurrence, alarm limit value, alarm recovery time, operation user, alarm variable name, etc.

The feeding system utilizes PLC as the central control area to complete the whole process of weighing and feeding. The PLC central control area sends out a signal to start the corresponding solenoid valve to inject the liquid into the reaction kettle, and at the same time, the weighing module starts to work. When the amount of liquid in the reaction kettle increases to the same value as the weight set by the quantitative setting finger, the central control area receives the action signal from the weighing module, and immediately closes the solenoid valve for adding liquid and stops adding liquid. Automatically start the stirring switch, the control area sends out the instruction to start the corresponding solenoid valve of the mixer and the timer set by the program starts to time, the mixer stirs the solution evenly; when the timer time reaches the set value, the control area sends out the instruction to close the solenoid valve and stops the stirring.

The automatic hopper system utilizes the advantages of data acquisition, control technology and configuration software to develop a mechanism with mutual monitoring between the computer and the weighing instrument and various alarm mechanisms, which not only sends an alarm signal even if the computer is dead, but also continues to operate in the original state, thus guaranteeing the quality of the product and the yield. All data can be saved. In order to ensure data efficiency, the default data saving method is time-driven, i.e., when the ratios are modified, when an alarm occurs, or when other pre-defined events occur. The system also provides querying of statistical data, such as yield reports. Data query can be realized not only locally but also on any networked computer.

The Weighing Hopper System is a general purpose data acquisition and monitoring software for industrial automation, capable of acquiring all kinds of information from the automation process and dosage, displaying the information in a graphical and other easier to understand way, transmitting the important information to the relevant personnel by various means, carrying out the necessary analysis and processing of the information and storing it, sending out the control commands, etc. It provides a wealth of functions for industrial automation and dosage, configuring and other relatively easy tasks to build up the dosage functions you need. The DXD200 provides a wide range of functions for industrial automatic dosage, and it is easy to set up the dosage functions you need by configuring them.

Weighing and dosing system adds a certain amount of raw material from raw material tank to continuous mixing tank, according to different requirements of dye color, a certain amount of pigment (containing blue, red and yellow primary colors) from three reaction tanks is sent to continuous mixing tank, and then stirred for a certain period of time at a certain stirring speed in continuous mixing kettle and discharged through pipeline according to different dosing ranges. By calling the corresponding unit in the controller, the final realization of the material batch production. The process functions of mixing, resting and layering, and product discharge are realized by the mixing and discharge, and the related data in the units shown in dotted lines.

The dosing system automatically adjusts the wind speed, circulating liquid flow rate and inlet liquid temperature according to the set operation parameters, collects the parameters of inlet and outlet liquid temperature, wind speed, atmospheric pressure, circulating liquid flow rate, wind resistance and liquid resistance, and sends them to the upper computer. The upper computer reads the data sent by each on-site measurement and control unit and calculates the liquid-side heat dissipation and air-side heat absorption according to the corresponding formulas specified in the standard. Usually chemical and physical changes occur in the dosage process, which can be composed of a number of simple tasks for the control of weighing. The process unit includes all production operations and auxiliary operations in batch production, which are processed in accordance with the order and operating parameters specified in the formula, guaranteeing the control of the dosage process without changes in quality.

The dosage system picks up the weight through the pressure weighing module, amplifies and filters the picked up weight signal, enters into the A/D converter for analog-to-digital conversion, and then sends it to the weighing instrument to analyze and process the signal, and the result is outputted to the industrial control through the RS232C communication serial port, and it also reacts and performs the corresponding operation according to the signal result. Adopted the industrial control machine batching centralized control mode, is by a host and more than one slave machine through the network link up, the host will control the task to each slave machine to complete. The whole industrial control machine batching is divided into industrial control electronic scale and weighing instrument.