The automatic sorter adopts advanced 32-bit high-speed processing chip. For multi-functional and user-friendly operation interface. All digital signal processing and transmission. Adopt a newly designed stainless steel frame with high protection level, touch screen LCD and high performance operating system. Large-capacity product storage and abnormal records. The sorting scale is mainly composed of Electronic scale platform, LCD screen, control keyboard, weighing instrument, data processor and PLC as the upper computer of the system. The weighing and Sorting machine is mainly composed of rotating wheel, belt, weighing module and photoelectric detector. The wheel is driven by the motor controlled by the weighing instrument, and the belt is driven to move by friction. The two photoelectric detectors are used to detect the object entering and leaving the weighing area respectively. When the object enters the weighing area, the data processor starts to collect the weight data transmitted by the weighing sensor until the photoelectric detector detects that the object leaves the weighing area, and then the data processor processes the weight data collected during this time period. The final weight data of the measured object is sent to the display terminal for display. At the same time, the objects are classified according to whether the weight of the measured object is qualified or not, and the unqualified products will be rejected. The rejection device adopts the mechanical structure of push rod.

As the upper computer, the PLC of the sorting system first sends instructions to the weighing instrument, the data processor and the display content of the liquid crystal display screen to control the weighing instrument and the data processor according to the measuring process. The data processor processes the collected weight data and sends it back to the PLC. The PLC displays the obtained data on the liquid crystal display screen according to the specified format. The control keyboard is integrated on the liquid crystal display screen, and the plastic film keys are used. The keyboard mainly exchanges human-computer interfaces. The weighing instrument mainly communicates with the host computer, receives the commands from the host computer, and controls the motors synchronously and at high precision at constant speed, and controls the motors at variable speed.

Weighing and sorting machine is a weighing conveyor integrating sorting, conveying, weight detection and feeding. The weight change is transmitted to the strain bridge pile through the mechanical part, and the weak signal output by it is filtered and amplified by hardware, sent to high-performance A/D and converted into digital signal. The CPU processes the data (software filtering, parameter estimation, etc.) according to the commands (sampling frequency, filtering mode, model variables, etc.) transmitted by the ARM measurement and control system, and then outputs specific data packets to the ARM measurement and control system through the communication interface, and the data acquisition system converts the changes of weighing signals into weak electrical signals. The electrical signal is filtered by appropriate hardware, and then amplified to realize digital-to-analog conversion. According to the instruction of ARM measurement and control system, the data is processed and transmitted in the form of data packets to realize the digitalization of sensors, data acquisition, data processing, key display and output sorting. With ARM7 as the control core, it has high processing speed and is suitable for dynamic weighing occasions that need fast data processing.

The weight sorter adopts strain sensor, which effectively solves the data processing problem of weighing response through a large number of data and system response control, effective control of mean filtering and extreme filtering, and greatly improves the anti-interference ability of the system. Because the time interval between sampling points is fixed (software setting), the difference between the sampling points before and after reflects the change rate of these two points of data. By filtering out the points whose change rate exceeds the threshold set by the system, the remaining points with small change rate are averaged, and the data obtained is very close to the set value. In order to prevent several consecutive points with small change rate from appearing outside the effective data area, it will stop until the data before and after filtering are consistent, so as to eliminate its interference.