Research on Maintenance Process Technology for Rail Vehicle Carbody Surface Quality
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 5
Abstract
Objective After manually polishing the surface of railway vehicle carbodies and subsequently repairing paint defects, because of uncertainties in the vehicle operating environment and varying degrees of paint deterioration, the surface maintenance process becomes difficult to control, leading to instability in the process. Therefore, it is necessary to study the maintenance technology for the surface quality of railway vehicle carbodies. Method A rail vehicle carbody grinding robot process system is established, employing visual sensors to detect surface paint defects such as yellow spots, scratches, and peeling along the grinding path. The defects are processed through image analysis, and converted into central coordinates of the paint defect areas. The 'nine-point method' is applied for hand-eye calibration of the robot to calculate the transformation matrix. The central coordinates obtained from image acquisition are transformed into the robot working space coordinates. Using an improved adaptive genetic algorithm based on the shortest path principle, the robot coordinates are optimized for path planning to form the most efficient route for defect grinding on vehicle carbody surface. Result & Conclusion The system automatically extracts defect area central coordinates from captured images and converts them into end-effector movement coordinates in robot workspace. Through the optimization of robot defect grinding paths using the above algorithm, the system improves the efficiency of manual operation while enhancing the stability of surface quality maintenance technology for vehicle carbodies.
Authors and Affiliations
Li ZHENG, Ping XUE, Jun CHEN, Lirong ZENG, Xu XIONG, Fuguang SHI
Keywords
Related Articles
- EP ID EP735644
- DOI 10.16037/j.1007-869x.2024.05.041
- Views 10
- Downloads 0
Selection of Visual Rail Train Trajectory Following Points Based on Minimum Passing Width on Circular Curves
[Objective] The impact of selecting trajectory following points for a type of three-module visual rail train on vehicle road passing width is studied, providing theoretical basis for the choice of trajectory control poin...
Temperature Field Development Characteristics of Frozen Method Construction for Metro Link Passages in Shanghai Soft Soil Stratum
[Objective] In order to predict the development of the frozen wall before the frozen method construction and validate the rationality of the design, providing a scientific guidance for engineering construction, it is nec...
Influencing Factors and Control Effects of Targeted Grouting Technology for Underground-excavated Metro Station Construction
[Objective] In conventional grouting construction technology, the ineffective diffusion of grout is comparatively severe and leads to unsatisfactory reinforcement effects on surrounding rock and soil mass. Therefore, it...
Design and Construction Optimization for Elevated Long-link Seamless Urban Rail Transit Station with Bridge-building Unified Structure
[Objective] The elevated long-link seamless station with bridge-building unified structure integrates building and bridge and enables the station pier column to have stiffness requirements while possessing the characteri...
Cause Analysis and Improvement Measures for Maglev Train Brake Release Failure in Beijing Subway Line S1
Objective The maglev train of Beijing Subway Line S1 had a brake release failure during operation, impacting line normal operation. Therefore, it is necessary to find out the exact cause of the fault and put forward impr...