Accuracy comparisons in IMU sensor and motion analysis software

With the technology development and the accuracy improvement in inertial measurement unit and micro-electromechanical system, the novel motion capture system is invented for suitable usage in natural environment or long term usage. Nevertheless, the accuracy and the consistency of the inertial measurement unit have not been provided by instructional measure system, such as robotic evaluation or standard motion capture system. Here in this study, we tested the self-development inertia sensors combined with well-programmed motion analysis software, for supporting the evidences that price less and proper software usages could afford valuable human motion variables. Results showed that in lower test speeds during the pitch and roll motions obtained reasonable root mean square value; and with further application in knee motion analysis, the abduction/adduction and internal/external rotation motions had great reliability for measuring body movements. With limited programming barriers needed solve, the updating motion analysis software could be applied in the clinical researches, for improving data accuracy and usage population.