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.
020-34563445Feeding system is a complete set of automation equipment to realize dynamic weighing and dosage control through electrical control management and visualization man-machine software configuration. The electrical control part of the system adopts Siemens PLC, which is programmed and controlled according to the production requirements; the software adopts man-machine configuration, according to the process requirements, through the monitoring system and PLC program to control the weight and flow of the materials loaded into the weighing hopper, so as to realize the accurate measurement and dosage. The system has strong stability and high cost performance, and can provide accurate measurement data and control means for production control and management of various industrial sites.
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 calculates the actual amount of material, when the actual amount of material to meet the material set value when the material to close the charging valve, from the whole process of action can be seen, the valve closure action lag will inevitably cause charging error, the value of the error is about the lag time and the closure of the instantaneous volumetric flow rate, 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 valve closing signal from the weighing controller and the shut-off valve shutting down, including the action lag of the relay and the action lag of the shut-off valve.
The feeding system is composed of Siemens series PLC, circuit breaker, relay, frequency converter and terminals, all of which are of famous brands at home and abroad. Compact structure, stable work, full-featured, with overload, short-circuit, phase failure and other protection, can complete the equipment automation and process automation control. The system adopts high-end configuration software as the upper computer, through which it issues commands to manage the automation equipment and process. It replaces the traditional system with the standard industrial computer software and hardware platform as the integration carrier, featuring strong adaptability and good openness.
