The belt scale adopts three groups of weighing bridge, one of which is installed at the back of the belt conveyor feeding point, where no material passes through, and can only weigh the tare, which can realize real-time online automatic peeling when conveying materials; The other two groups of scales are installed in the front of the blanking point, and weigh the material at the same time during the conveying process, and compare and calibrate the material online.

The main control part of automatic belt scale adopts PLO programming controller (PLC), which is composed of CPU module, I/O module, high-speed counting module, AD/DA module and scanner module. It is responsible for the entire digital quantity input and output control and provides the input and output signals required for external connection. It is used for frequency conversion speed regulation control and current instantaneous flow output 4-20mA current signal, the speed adjustment signal after computer processing is sent to the inverter by NI04I, and the encoded pulse from the speed encoder is sent to the high-speed counter by PLC calculation to obtain the running speed of the belt.

Automatic Belt Scale is an example of a belt scale with a fully suspended weigh frame formed by the support of four load cells, which are divided into four independent signals into the field digital converter. The belt is used for continuous feeding during the feeding process and the feeder delivers the material from the user's silo or other feeder and weighs it through the weigh bridge.

The load cell of the belt scale is installed on the weighing bridge, when the belt is working normally, the detected weight of the materials on the belt will be transmitted to the weighing instrument, and the speed signal of the belt conveyor detected by the speed sensor of the belt scale will also be transmitted to the weighing instrument, which will convert the speed signal with the weighing signal and get the instantaneous flow rate and the cumulative output. The speed sensor is directly connected to the large diameter speed measuring pulley, and is used to provide a series of pulse data, each pulse represents a belt motion unit, and the frequency of the pulse is proportional to the belt speed of the conveyor.

Belt scale consists of steel mechanical weighing frame, speed sensor, high precision weighing sensor, electronic belt scale manipulation display instrument panel, etc. It can carry out continuous dynamic measurement and verification of solid materials. It is a fully automated electronic scale that continuously weighs the bulk material in the conveyor belt without the need for quality segmentation or termination of the conveyor belt movement.

The belt scale consists of a weighing bridge, load cell, speed measuring drum, speed sensor and accumulator. The load cell is mounted on the longitudinal beam of the conveyor, which supports the weighing rollers and detects the weight of the material on the belt, generating a voltage signal proportional to the belt load. The speed sensor is directly coupled to the driven pulley or to a large diameter pulley and provides a series of pulses, each pulse representing a unit length of belt run, at a frequency proportional to the belt speed. The accumulator receives the signals from the load cell and the speed sensor, and after A/D conversion, filtering and shaping, enters the microprocessor to perform arithmetic operations, and outputs the cumulative and instantaneous flow rate, the belt speed, the counting pulses, and other parameters.