The weighing hopper feeder is a dynamic weighing and feeding method for the hopper scale. In the quantitative weighing device, an integrated mechanical and electrical equipment driven by an electric motor (commonly known as a screw feeder motor) is placed between the silo and the hopper. The electronic control device realizes the dynamic quantitative weighing of powder and granular materials. The powder and granular materials in the silo rotate with the rotation of the screw feeder mechanism and enter the hopper. There are three strain-type weighing modules between the hopper and the scale frame. When the set weight value is reached, the screw feeder motor is turned off to stop feeding, and the hopper door is opened to discharge the material, thus completing a dynamic weighing and quantitative feeding process.

The weighing reduction machine measures the change in weight obtained per unit time by using the weighing module. The change in weight is based on the actual feeding rate of the screw conveyor. The weighing hopper and the screw mechanism are regarded as the entire scale body. The weight signal of the scale body is continuously sampled by the weighing instrument or the upper computer, and the change rate of weight per unit time is calculated as the instantaneous flow rate. Then, through various software and hardware filtering techniques, the "actual flow" that can be used as the control object is obtained.

The weighing reduction machine controls the speed of the discharge screw conveyor based on the rate of weight reduction of the material in the weighing hopper to achieve the purpose of quantitative feeding. When the material in the weighing hopper reaches the lower limit of weighing, the discharge screw conveyor fixes the discharge volume according to the current speed and simultaneously controls the material in the silo to quickly drop into the weighing hopper. When the material is loaded to the upper limit of the scale, the loading stops. Rapid loading can shorten the feeding time, improve the accuracy of weighing and control precision. Through the fixed-value control of material quantities at each stage, automatic batching control and the collection and transmission of a series of signals are achieved during the production process, thus realizing precise control of feeding.

When the elastic body of digital weighing for forklift truck is subjected to a force from the direction of force (such as the gravity of goods), the elastic body produces a corresponding slight deformation, which is transmitted to the digital weighing instrument through the force transmission mechanism. The gravity signal output by the sensor is amplified and filtered, and then transmitted to the A/D converter to be converted into a digital signal. The weight value is calculated by the microprocessor according to the mechanical mathematical model, and the weighing data is prompted to be read when the forklift truck mast is in a vertical state. The digital weighing LED displays the results, and the real-time data is uploaded to the computer control room by the weighing instrument through wireless.

Ground balance Electronic scales with patented utility model technology, weighing scales for use in environments with explosive gases or explosive dusts. Explosion-proof electronic scales use isolation, voltage reduction, current limitation, sealing and fiber-optic communication technologies to eliminate or isolate the links in the system that may generate sources of explosion (electrical short-circuit sparks, electrostatic friction sparks, high-temperature energy concentration, etc.), so as to achieve the purpose of electronic scales to be used in environments where there is a risk of explosion. Carbon steel structure, electronic scales with optional ramp and stainless steel weighing pan. It can be fitted with a remote display, connected to a computer or with a printer to print the data (for use in non-explosion-proof areas).

The Formula electronic scale comes with an RS-485 (MODBUS-RTU) interface, while the serial communication port of the PC is an RS-232C interface, and the two need to communicate with each other through the SC-09 adapter cable. Electronic scales use the RS-232C standard to transmit signals using the voltage difference between the signal line and the common ground, a unidirectional transmission method; the RS-485 standard uses the voltage difference between the signals of the transmission line to transmit, a differential transmission method. the SC-09 cable realizes the conversion between these two different signal transmission methods.

Cloud computing Explosion-proof electronic scales integrated application data weighing management system, the use of mobile Internet, Internet of Things, big data and cloud computing and other related technologies and the establishment of the cloud service platform serving the whole process of production and sales. To create the whole process from product production, manufacturing environment, logistics and transportation, terminal sales and other regulatory embodiment. Adopting modular real-time monitoring instrument hardware and utilizing the powerful function of Programmable Logic Controller (PLC), it realizes full-automatic control of the production process of fluid back-channel packaging, "Weighing and measuring system monitoring", "Automatic control of stacking unit", "Recording and storing of production data", and "Networking with the upper computer for 485 or TCPIP communication and data transmission".

Volume 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.

Touch Screen Explosion-proof electronic scale has man-machine interaction, communication, display and storage, printing and other functions, and has data, graphic display, status monitoring, data input, information storage and other functional screens related to operations. Real-time process data monitoring, simulated display of process flow, real-time data record review, operator authority setting, process parameter setting, event alarm setting during operation and manual and automatic control switching. Monitoring system in the field control weighing instrument real-time display flow, load, cumulative value, temperature and so on. Temperature indication through the field temperature display instrument, pressure indication through the field pressure and motor through the field display instrument remote to the central control room centralized display.