Visual quality inspection-based automatic production line logistics control method, terminal and storage medium

By establishing two-way communication between PLC, vision inspection system, and industrial robots in the new energy vehicle production line, parallel collaboration of parts processing, vision inspection, rework, and spot checks is achieved, solving the problems of low production efficiency and resource waste under the traditional logistics control mode, and improving production efficiency and inspection accuracy.

CN122239656APending Publication Date: 2026-06-19JIER MACHINE TOOL GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIER MACHINE TOOL GROUP
Filing Date
2026-05-21
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Traditional logistics control models in automated processing and assembly production lines for large integrated die-cast body parts of new energy vehicles result in long waiting times for each process, slow production cycle, low rework and buffer utilization rates, and an inability to meet the demands of high-capacity and high-efficiency production. Furthermore, the quality inspection and rework processes are fragmented and cannot be dynamically scheduled.

Method used

By establishing two-way communication between the PLC, the vision inspection system, and the industrial robot, real-time logistics drive control is achieved. Combined with an adaptive exposure compensation mechanism, a graded quality judgment model, a comprehensive scheduling cost function, and defect feature extraction, workpiece diversion and trajectory planning are optimized, enabling parallel collaboration of parts processing, visual inspection, rework processing, and sampling inspection.

Benefits of technology

It significantly shortened the production line waiting time, improved the production cycle and equipment utilization, enhanced the detection accuracy and reliability of quality inspection results, balanced the workstation load, optimized the utilization of rework resources and quality inspection resources, avoided motion interference, and formed a closed-loop quality control.

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Abstract

This invention belongs to the field of industrial production control technology, specifically relating to an automated production line logistics control method, terminal, and storage medium based on visual quality inspection. It includes a PLC sending a photo trigger signal to a visual quality inspection system based on an established communication connection. The visual quality inspection system performs visual inspection on the processed workpiece and feeds back the inspection results to the PLC. The PLC determines the workpiece quality status based on the visual quality inspection results received in step S3. The PLC diverts and schedules non-conforming workpieces based on the rework station status signal and the buffer station status signal. Workpieces are intelligently graded according to visual inspection confidence levels, and low-confidence workpieces are automatically triggered for secondary re-inspection. This significantly improves the reliability of quality inspection results while ensuring inspection efficiency, avoiding misjudgments caused by single threshold judgments.
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