The sensor feeding system is mainly applied to the feeding system of hopper dryers. It uses weighing instruments as the central processing unit and automatic control technology to achieve its functions. When the air pump of the Feeding machine rotates, the air pump generates negative pressure to form a vacuum airflow, and the material is sucked into the suction nozzle to form a material airflow, which then reaches the material bin of the feeding machine through the suction pipe. The filter completely separates the material from the air. When the material fills the silo, the controller will automatically cut off the power supply, the vacuum Feeder will stop working, and at the same time, the silo door will automatically open, and the material will fall into the hopper of the equipment. Meanwhile, compressed air automatically cleans the filter through the pulse back-blowing valve. When the time sensor or the material level sensor sends a feeding signal, the feeding machine will start automatically. The high vacuum generated by the vacuum pump is achieved by the high vacuum produced by the rotation of the air pump in the vacuum powder feeder to convey materials. It eliminates the stratification of the conveyed materials and ensures the uniformity of the composition of the mixed materials. It is the preferred equipment for automatic feeding of machinery such as spinning machines, tablet presses, capsule Filling machines, dry granulators, packaging machines, crushers, and vibrating screens. The feeding machine control system sets the parameter values for conveying, discharging, full material, and empty material of the two production lines according to the requirements of the feeding process. It can also load the previous process parameter values of the system. The basic control requirements of this feeding machine are: One motor is used to control two production lines. It should be capable of detecting the full material status and displaying the conveying, discharging and full material times, with a time error of 0.1 seconds, and have anti-interference capabilities.

The feeding system is a complete set of automated equipment that realizes dynamic weighing and batching control through electrical control management and visual human-machine software configuration. The electrical control part of the system adopts Siemens PLC and is programmed and controlled according to production requirements. The software adopts human-machine configuration. According to the process requirements, it controls the weight and flow rate of the materials loaded into the weighing hopper through the monitoring system and PLC program, thereby achieving precise measurement and batching. It is mainly composed of a storage bin, a coarse feeding mechanism, a fine feeding mechanism, a weighing cylinder, a weighing sensor, a discharging mechanism, a PLC control system and a pneumatic system. When the feeding machine is in operation, the coarse and fine feeding mechanisms feed materials simultaneously first. According to the output signal of the weighing module, the PLC control system controls them respectively according to the set values of the weighing. When the weighing module reaches a certain value, the coarse feeding mechanism stops feeding. The feeding mechanism continues to feed until the set value of the system is reached and then stops. The discharging mechanism flips the weighing cylinder and pours the material into the qualified receiving cup at the working position, completing a qualified weighing process. If the feeding mechanism exceeds the feeding tolerance, the discharging mechanism will automatically pour the weighed material into the receiving cup of the unqualified station, and the system will give a prompt message. When the material level in the storage bin drops to a certain amount, the alarm will issue an audible and visual alarm to prompt the operator to load materials, ensuring the continuous operation of the automatic feeding machine.