Motion capture systems play an important role in health-care, sport-training systems and cartoon animation. This paper develops a motion capture system with inertial motion trackers for three-dimensional animation production. The system mainly involves inertia sensing technology, Bluetooth, sensor network and software development of human body motion capture model. The sensor network is used to collect motion data of the body key joints, and the data are delivered to workstation through

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... h, then the software on workstation uses analytical inverse kinematics algorithm to analyze the motion data. Human body motion capture system mainly involves the design of human body model and development of real-time reconstruction software. A human body is abstracted into 17 key joints affecting human movement for model, and inertial sensors are put on each joint point to measure the motion data of the node, so a 17 nodes sensor network is built. The experiment shows that the model tends to handle uncertainty well and the software and hardware of motion capture system have advantages of good consistency of virtual character and performer athletic stance and farther effective communication distance, and it is very easy to further expand the research of this subject, such as the design of multiplayer real-time motion capture system.