The signal acquisition of the sorting system mainly relies on color sensitive sensors. Because the colors of each block are different, sorting operations can be distinguished based on the changes in color values. Since only the sorting system is required to distinguish changes in color values, there are no specific requirements for color calibration of items. There are three specific color measurement methods: direct, transmissive, and reflective. Considering that the system is used in item sorting systems, the reflective measurement method is used.

Install color sensors on the sorting branch, adjust the working point of the color sensors, and when performing color measurement, calculate the signal output size of the signal acquisition circuit to obtain the color value of the measured object block. Compare the measured color value with the color value of the object block in the microcontroller to obtain the most relevant value between them and determine the color of the measured value. If sorting is required, drive the pneumatic actuator.

1. Job Description of Automatic Sorting System

The automatic logistics sorting line system is one of the necessary facilities for logistics centers, distribution centers, or distribution centers in developed countries such as the United States and Japan after World War II. The operation process of the system can be briefly described as follows: The logistics center receives thousands of types of goods from thousands of suppliers or shippers through various transportation vehicles every day, unloads these goods in the shortest possible time, and quickly and accurately classifies them according to parameters such as product variety, shipper, storage location, or sending location, and transports them to designated locations (such as designated shelves, processing areas, shipping platforms, etc.). At the same time, when the supplier or shipper notifies the logistics center to ship according to the delivery instructions, the automatic logistics sorting line system accurately finds different quantities of goods to be shipped from the large high-rise shelf storage system or other designated locations in the shortest possible time, and transports them to different sorting areas or distribution platforms according to the different delivery locations. Centralized for easy vehicle delivery.

2. Composition of Automatic Logistics Sorting Line System

The function of the loading device is to identify, receive, and process sorting signals, and instruct the classification device to automatically classify the goods according to the requirements of the sorting signals, such as product variety, delivery location, or shipper category. These sorting requirements can be inputted into the sorting control system through various methods, such as manual input, barcode scanning, color code scanning, keyboard input, weight detection, voice recognition, height detection, and shape recognition. Based on these sorting signals, the sorting device determines which sorting slot a certain product should enter. The function of the sorting device is based on the sorting instructions issued by the loading device. When a product with the same sorting signal passes through the device, the loading action changes the direction of operation on the conveying device and enters other conveyors or sorting slots or other interface devices. There are many types of sorting devices, generally including push out, floating, tilting, conveying, and branching types. Different devices have different requirements for sorting the packaging materials, packaging weight, and smoothness of the bottom surface of the packaging materials. On both sides of the sorting device, several sorting gates are generally connected to allow the sorted goods to slide down the main conveyor (or main conveyor belt) for subsequent operations.

The design of the experimental device for the push out logistics sorting line and the automatic recognition experimental system for sorting signals focuses on the design of the sorting push out device and control signals. There are various methods for sorting devices, including flip type sorting devices, horizontal push out tape sorting devices, and roller type sorting devices. Considering that this design involves the experimental setup of a push out logistics sorting line and the design of an automatic sorting signal recognition experimental system. The sorting experimental device adopts a power roller conveying device, and the driving device is a combination of an electric motor and a planetary cycloidal pinwheel reducer. In this way, the roller rotates in an active state, and the operating state can be strictly controlled to accurately, smoothly, and reliably convey items at the specified speed. Power roller conveyor devices generally use chain transmission, with a compact single chain transmission structure, suitable for light load, low-speed, and continuous operation. Double chain transmission is suitable for situations with large loads, high speeds, and frequent starting and braking. Therefore, single chain transmission is selected for this design.