Weighing distribution system by mixing bin, storage tank, weighing sensor, level meter, Mitsubishi FX2N128 point PLC, F900 series touch screen and a number of control valves and other devices, mechanical and control two parts. The feed bin sends materials to the weighing bucket under the drive of the motor, the weighing bucket is supported on the weighing sensor, and the electrical signal representing the weight generated by the sensor and transmitter is collected by the PLC and computer after the signal amplification module. When the predetermined weight is reached, the PLC drives the motor to open the weighing bucket door, the material enters the mixer, and the mixing motor is started at the same time. After stirring to the specified time, open the discharge port and discharge the material, and the batching process is completed.
020-34563445Batching control system is a kind of binder and additives such as uniform mixing, with its scientific ratio, the use of modern advanced control equipment and technology, the establishment of a diversified ratio library and online rapid reaction control unit is feasible and urgent need to use modern advanced control equipment and technology, the establishment of a diversified mortar ratio library and online rapid reaction control unit. With the matching library as the input driver, a fast adaptive control center is established, which can quickly replace the production control process of products with different ratios and performance. By analyzing the production requirements for control quantity and performance, a networking scheme based on fieldbus technology is determined.
The feeding system realizes the weighing and measuring work of the reaction tank through the combination of weighing module, weighing instrument and control system, thus controlling the system. Can be applied to all kinds of batching equipment. Users can directly access PLC system and terminal control system to achieve multi-range control and automatic control. The system digitizes the weak weight signal output by the weighing module to obtain high precision weighing data. The software is equipped with rich digital filtering technology and emergency software to prevent interference system from getting out of control.
The adaptive control can detect and analyze the uncertain conditions, parameters, time delay and disturbance in the control process, and realize the online self-tuning of PID parameters Kp, Ki and Kd by inference method. It not only maintains the principle of conventional PID adding control system, but also adopts the simple and fast realization, and adopts the two-dimensional control structure. By adjusting the three parameters of PID of the main regulator in real time, the temperature control of the polymerization kettle is completed. The incremental PID algorithm has the characteristics of small calculation error, no impact switching and high reliability.
