In context
In 2024, wall-climbing robots were increasingly deployed for high-altitude inspection tasks in industries such as pipeline, wind turbine, and ship maintenance. However, adapting to variable curvature surfaces—common in real-world structures—remained a challenge, as existing designs often suffered from poor stability, limited mobility, and insufficient contact area on curved walls. This paper addressed those gaps by proposing a novel robot structure with an independent adaptive module.
What was reported
Researchers at Lanzhou University of Technology designed a wall-climbing robot with a separate structure, where the adaptive module is relatively independent from the main body. The robot uses wheeled locomotion with four drive wheels, each housing a Halbach array of permanent magnets, and a U-shaped magnetic bridge on the chassis for additional adsorption. The adaptive connection modules allow each wheel to pitch and roll independently, maximizing contact area on curved surfaces.
Mechanical modeling calculated the adsorption forces required to prevent slipping and overturning during longitudinal/lateral direction switching, climbing, and obstacle crossing. Magnetic circuit simulations optimized the permanent magnet design, analyzing the effects of air gap and wall thickness on adsorption force. Experiments on variable curvature walls demonstrated flexible direction switching, stable adsorption, and strong adaptability, with a minimum curvature radius of 0.46 m and the ability to carry 7.2 kg of equipment on a 90° wall.
The robot employs a fast direction-change mechanism using servo motors, allowing quick transitions between longitudinal and lateral movement without large body rotations. A layered control system with remote operation via ESP8266 supports image transmission and status monitoring.
Why it mattered
This work advanced the practical deployment of wall-climbing robots in industrial inspection by improving their ability to navigate complex curved surfaces, which is critical for ensuring complete coverage and reliable adhesion in real-world structures. The design principles—independent adaptive modules and optimized magnetic adsorption—offer a reference for developing more versatile and stable climbing robots for manufacturing and maintenance applications.
The results show that the designed wall-climbing robot features flexible longitudinal/lateral switching movement, stable adsorption, and strong adaptability to variable curvature surfaces.
Source: 《机器人》期刊 (robot.sia.cn) · Published 2024-09-15 · “变曲率立面自适应爬壁机器人结构的设计与分析”