Core technical advantages: First, miniaturized adaptive design, adopting a folding fuselage design, the fuselage size is only 20cm×15cm×8cm, which can quickly enter the shaft through the elevator landing door gap, adapting to elevator shafts of different sizes and lifting heights, with a maximum adaptive lifting height of 300 meters; Second, fully autonomous inspection and navigation, equipped with lidar + visual SLAM navigation system, no need to arrange marking points in advance, can realize autonomous positioning, autonomous obstacle avoidance, and autonomous planning of inspection paths in the closed shaft, realizing full coverage of the shaft without dead corners; Third, AI defect intelligent recognition, built-in AI large model trained by tens of millions of elevator shaft defect samples, can automatically identify 28 types of common defects such as guide rail rust, bracket bolt looseness, shaft wall cracking, traveling cable wear, counterweight device deformation, automatically mark the defect location, size, severity, and generate inspection reports and rectification suggestions; Fourth, 3D modeling digital twin, quickly generate high-precision 3D digital model of elevator shaft through 3D scanning technology, establish shaft digital twin, which can realize historical inspection data comparison, defect change trend analysis, and life prediction; Fifth, safety redundancy design, equipped with multiple obstacle avoidance sensors, power-off emergency hover, out of control automatic return function. It can still fly stably in the environment without GPS signal in the shaft. The inspection process does not touch the elevator equipment and will not cause any damage to the elevator. At the same time, the whole process is recorded and archived, which is traceable and reviewable.