Case|Helping the safety of urban rail transit, track slab detection has been mastered!

background

The construction of urban rail transit is in the ascendant in China, which not only serves as a beautiful business card of the city, but also has a special status and role in solving urban traffic problems. As one of the important links of urban development, the safety and reliability of urban rail transit have become an important issue that must be faced today. When it comes to urban rail transit safety, people usually think of security checks, surveillance cameras, etc., but this is only the tip of the iceberg of safety issues, and the case we are going to talk about today is like a hidden corner - track slab detection.

The track slab refers to a new type of under-rail component that is used to support and fix the rail and distribute the load transmitted by the train through the rail to the base under the slab. During its use, the track slab will be exposed to the natural environment for a long time, and will be subjected to long-term huge loads, train impacts, temperature cycles, and water invasion. Therefore, in order to ensure the safe and stable operation of rail transit, the track slab must be of reliable quality as its support, and defect detection is essential.

pain point

The track slab is mainly composed of rails, fasteners, prefabricated track slabs, self-leveling concrete adjustment layers, limit stops, geotextiles and reinforced concrete bases. In order to ensure the production quality of the track slab, the manual handheld quality inspector still scans the surface of the track slab in the harsh production environment, and then conducts data collection and analysis to detect the damage and internal defects of the track slab, the track slab separation detection, etc. Because the staff is required to hold the quality detector all the time to scan, its labor intensity is very large, and the scanning action is not stable due to factors such as work fatigue for a long time, resulting in its scanning effect is not ideal, and its production quality can not be guaranteed.

▲The overall quality inspection of the track plate and the base plate mainly adopts elastic wave CT, which takes the impact elastic wave as the medium, the wave speed and the signal amplitude as the calculation basis, and scans the inspected object in all directions through the cross-measurement line, and obtains the structural quality distribution image that can truly reflect the internal situation of the structure through the inversion and reconstruction of the collected data, so as to achieve the purpose of detecting the quality in the structure.

Faced with the increasing difficulty of recruiting jobs, the customer quickly turned its attention to the field of automation. Since all walks of life are implementing "robot substitution", why can't customers introduce more robot solutions to solve the current problems in the case of heavy personnel burden? Therefore, the customer contacted a partner with cross-industry automation integration experience, and finally proposed an application solution to replace manual track plate inspection with collaborative robots, and realized the automation of track plate inspection by using the characteristics of collaborative robots with flexible actions, easy deployment and convenient operation.

solution

In the end, the integrator chose to cooperate with Elite Robot, which has more practical landing experience, and after on-site visits and many discussions, the customer finally used Elite EC63 collaborative robot, with a load of 3kg, a working radius of 624mm, and a repeat positioning accuracy of ± 0.03mm.

Considering that the track plate area is relatively large, the arm span of a single robot cannot be completely covered, so the robot needs to be installed upside down on the gantry and move with the module forward, backward, left and right. After the module reaches the predetermined point, the robot will carry out rotation, arm swing and precise positioning with the scanner at the end.

Case|Helping the safety of urban rail transit, track slab detection has been mastered!

In this project, the Elite cobot is compact and lightweight, and the joints are flexible, and the whole inspection process is smooth and smooth. What's more surprising to the customer is that because the weight of the robot is relatively light, the rigidity requirements for the module are not high, so that the cost of structural parts can be well controlled, so the solution has also been fully recognized by the customer.

The application solution of using collaborative robots to replace manual labor has achieved more "efficient and accurate" track plate detection, liberated staff from heavy and bad work, redistributed human resources in work tasks, optimized production efficiency, and reduced the risk of occupational injury, which is what Elite Robot has been doing.

Case|Helping the safety of urban rail transit, track slab detection has been mastered!

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