Yi Dong Medicine Joint Trojan Horse Design According to user needs, we have jointly created this lower limb joint movement function parameter detector. This design can provide support for diagnosis and treatment of orthopedics, joint surgery, sports medicine, etc. and can be used for scientific research on related joint diseases. The system uses infrared three-dimensional tracking technology to measure the three-dimensional six-degree-of-freedom kinematic data of lower limb joints (patella, hip, knee and ankle) in gait, squat, up and down slope and other motion states in real time to evaluate the motion function of lower limb joints. High-precision digital navigation technology is used for motion capture and spatial positioning to accurately measure and collect lower limb joint data. Powerful data analysis function, to meet the needs of diversified scientific research, fast and easy operation (about 10 minutes per test) high-speed motion picture synchronous output real-time generation of inspection reports.