The construction of an electronic belt scale consists of a bracket and a belt, which is attached to the bracket at each end. When an object is placed on the electronic belt, the object exerts a force vector onto the belt, and the belt is tensioned as a result. The belt sends out an electronic signal with a frequency related to the degree of tension. When the belt is stressed, the electronic components inside will determine the weight of the object through the output signal of the pressure sensor through the computer processing system.
020-34563445The electronic belt scale is to control the raw material weighing and feeding device. According to the flow rate of the weighing and feeding device, the PLC system sets up the ratio of raw material and the total feeding volume, and also arranges the order by raw material bin. Through the upper computer communication to set the flow of equipment under each bin, when the system starts the weight signal and speed signal to the secondary weighing instrument, through the amplification of the A/D conversion, calculate the instantaneous flow and cumulative amount, and display in the field weighing instrument. The weighing instrument uploads the signal to the PLC module, the PLC analog input module collects the weight signal and speed signal of the feeding device, and carries out the self-tuning operation according to the parameter set by the user, if there is a deviation between the set value and the current value, then the PLC analog module outputs a standard signal (4-20mA) to the frequency converter for the device to be adjusted, and the frequency converter will change the rotational speed of the device in real time after accepting the PLC signal, for the disc, it will change the speed of the device in real time. After receiving the signal from PLC, the frequency converter will change the rotational speed of the equipment in real time, which will reduce or increase the feeding material for the disk and reduce or increase the material flow for the speed regulating weighing, so as to make the system have a stable state.
Electronic belt scale weighing bridge mounted on the conveyor frame, when the material passes through, the metering rollers detected the weight of the material on the belt conveyor through the lever action on the load cell, resulting in a voltage signal proportional to the belt load. In the belt scale there is a load cell mounted on the weighing bridge, when working, the weight of the material detected on the belt into the weighing instrument, at the same time by the speed sensor belt conveyor speed signal is also sent to the weighing instrument, the instrument will be the speed signal and the weighing signal for integral processing, to get the instantaneous flow and the cumulative amount. The speed sensor is directly connected to the large diameter speed roller, providing a series of pulses, each pulse represents a belt movement unit, the frequency of the pulse is proportional to the belt speed. The weighing instrument receives the signals from the load cell and the speed sensor, and through the integral operation, it gets an instantaneous flow value and cumulative weight value, and displays them respectively.
Main technical parameters:
Precision of single roller: +/-1%.
Precision of lever multi-roller: +/-0.5%.
Accuracy of suspended type: +/-0.125%~0.25
Belt speed: 0~6m/s
Remote transmission: 1000m
Inclination angle of belt conveyor: 0~30°
Working conditions and installation conditions:
Ambient temperature: mechanical: -20℃～+50℃
Instrument temperature: 0℃～40℃
Power supply voltage:220V(+10﹪,-15﹪)50Hz±2﹪
Relative humidity:150% or so
