The weighing hopper system measures through the weighing module, and compares the measured value with a given value (the given value is determined by the ratio of material A and material B) and the measured value, and then transmits the result of the comparison to the PLC's A/D analog module, and then transmits the control signal (4-20mA current signal) through the PLC's D/A analog module to the electric regulating valve, and then controls the servo motor in the electric regulating valve to open the electric regulating valve to control the size of material B inlet. The control signal will control the servo motor in the electric control valve to adjust the opening degree of the electric control valve, so as to achieve the control of the feeding size of material B.

Detection machine can accurately detect the weight of unqualified products in the continuous production line, according to its implementation of on-line judgment or weight automatic sorting control, qualified to return to the original conveyor belt, unqualified will be rejected (or alarm shutdown), and has the classification and statistics according to the settings. The hardware of the weighing system mainly consists of computer, signal detection part, signal conditioning circuit, data acquisition card part, control part and actuator part.

The inspection machine selects the continuous dynamic automatic weighing method to check the net weight of the objects, with alarm or fully automatic removal organization, thus achieving the net weight inspection without shutting down the machine on the production line. It is suitable for the discharge of bags and cartons. When the raw material is transferred to the middle of the weighing platform, the working pressure is applied to the load cell, which deforms and changes the characteristic impedance, outputting an altered pulse signal. This signal is amplified by an operational amplifier and output to a converter, which converts it into a convenient analog signal output to a microcontroller for calculation and manipulation. Based on key commands and its optimization algorithms, such results are exported to the display, which shows information about the net weight of the information object.

The detector enters the sorting scale at a neat and equal distance through the introduction conveyor, and when it passes the photoelectric sensor located at the front of the sorting scale, the sorting scale begins to measure the product. In the process of the product passing through the metering conveyor, the weighing component (weight sensor) completes the measurement of the product and displays the data to the operation department. The computer automatically compares the displayed measurement data with the pre-set standard weight value, upper and lower limits, and carries out the identification and sorting of overweight and light defective products.

Automatic inspection machine in the product conveying process to complete the measurement of product weight, and phase measurement of weight and pre-set range comparison, by the controller to send out instructions, the weight of unqualified products will be rejected or different weight range of products to the designated area. Usually consists of conveyor belt, controller, inlet and outlet conveyor. Among them, the weighing conveyor completes the collection of weight signals and sends the weight signals to the controller for processing. The in-feed conveyor is used to ensure adequate spacing between products by increasing speed. The outfeed conveyor is used to transport the inspected products out of the weighing area.

The automatic checkweigher is mainly completed by three parts: buffer part, dynamic weighing part and weight sorting part. Buffer section: mainly used for placing products, the speed is a little slower than the last two sections, mainly used as a buffer, so that the products enter the dynamic weighing section at a constant speed. Dynamic weighing: the products are dynamically weighed during the movement of the belt, and the weighing data is fed back to the control system. Weight Sorting Section: According to the weight data fed back from the dynamic weighing section, it determines the sorting action at which level of exit, and executes the rejecting action after the products run to the corresponding rejecting port.

The automatic checkweigher weighs objects in continuous motion, and the dynamic weighing equipment combined with load cells and other parts is not a fully automatic control system with closed-loop control, but a specialized data collection system. It is a specialized data collection system, which solves the problem based on the characteristics and values of the data signals obtained from the dynamic weighing equipment, and separates from them the DC components that are proportional to the quality, and the accuracy caused by the substitution of the specific values by their measured values, which is critically dependent on the influence of the dynamics of the weighing and the dynamics of the weighing system (i.e., the transfer function of the weighing equipment).

The automatic checkweigher consists of weighing conveyor, controller and inlet/outlet conveyor. The weighing conveyor collects the weight signals and sends them to the controller for processing. The in-feed conveyor is mainly used to increase the speed to ensure that there is enough spacing between the products. The outfeed conveyor is used to transport the checked products away from the weighing area.

The automatic heavy machine is generally composed of a control device, a metering and detection machine, an automatic detection machine and a sorting crossing. The function of the control device is to recognize, receive and process the sorting signal, and according to the requirements of the sorting signal, the measurement and detection machine is instructed to automatically classify the goods by the type of goods, by the place of delivery of the goods or by the class of the cargo owner. These sorting needs can be entered into the sorting control system in different ways, such as through barcode scanning, color code scanning, keyboard input, weight detection, voice recognition, height detection and shape recognition, etc., according to the judgment of these sorting signals, to determine which sorting crossing a certain product should enter.