“…To ensure the safety and stability of wall-climbing robots at work, sufficient adsorption capacity is essential. In different working environments, different adsorption methods will be selected, such as negative pressure *Correspondence: xswang@seu.edu.cn 1 College of Mechanical Engineering, Southeast University, Nanjing, 211189, China 2 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing, 210036, China adsorption [1][2][3], bionic adsorption [4][5][6], thrust adsorption [7,8] and magnetic adsorption [9][10][11][12]. Permanent magnet adsorption is used for metal walls, which can provide a large adsorption force and does not require external energy consumption.…”