As an important mode of public transportation for urban residents, the subway carries tens of millions of passengers every day. Therefore, one of the responsibilities of the underground authorities is to ensure the public safety of passengers.
01 Background
When it comes to subway security, people usually think of security checks and surveillance cameras at station entrances, but these are far from enough for the construction of modern subway security facilities. The on-site inspection of the subway is still indispensable for inspectors, and every inch of rail and every screw should be related to the safety of subway operation. The inspection can only be done with practical steps, and there are no shortcuts. It seems very simple, the subway seems to have only two tracks, but it involves a lot of inspection items, and it is a labor-intensive job. A subway operator based in northern China now has to face this problem.
02 pain points
At present, most subway lines still use manual inspection. Each line requires 10 to 20 workers to carry out pedestrian inspection and maintenance in the tunnel before dawn every day, at a speed of 5 kilometers per hour. Disadvantages include low efficiency, personal safety hazards, lack of objective standards, lack of detailed raw data, increased labor costs, and omissions due to night work.
"How can a person who has to bend over more than 6,000 times a day, walk 15 kilometers on the tracks every day, and walk up to 25 kilometers at night?" Faced with a shortage of labor for special types of work, metro operators have had to turn their attention to the field of automation. Since all walks of life are promoting "machine substitution", why can't more robot solutions be introduced in subway operations in the face of the current problem of heavy workload of personnel?
The company then contacted experts from the Rail Transit Technology Research Institute and partners with cross-industry integrated automation experience, and finally came up with the idea of replacing manual rail inspection with composite robots. It is proposed to use AGVs equipped with collaborative robotic arms, which can move and detect on the track, perform various daily inspection tasks, and reduce the labor intensity of personnel.
solution
A complete set of programs can run continuously for 8 hours on a single charge, which is generally enough to complete the inspection of the entire subway line. It integrates ELITE's cobot EC66 (6kg payload) and weighs only 17.5kg. Compared with traditional industrial robots with the same load, its power is only 250w, which is 1/4 of the former, so the battery performance is better when the AGV is running. In addition, ELITE offers a 48V DC version for the collaborative robotic arm, which can be integrated with the AGV, eliminating the need for a robot control cabinet and being powered directly by the AGV, making it smaller in size.
Now customers have begun to use the equipment to accurately detect more than a dozen specifications such as track bed, fasteners, and track patrols, and can find and report faults in time, including missing fasteners, breaks, floating, cracks in the track, water accumulation and foreign objects in the track bed.
The collaborative robot + AGV solution is used to replace the manual inspection vehicle to achieve a "safe, efficient and accurate" track inspection process, liberate personnel from heavy work, and improve the overall operation efficiency.
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