2016 年 54Annual 巻 27PM-Abstract 号 p. S182
In these days, inertial sensors are used to measure body movements, for example joint angles or segment inclination angles. In many reports that refer to angle measurement, results from sensor systems were compared to those from optical motion analysis system to evaluate measurement accuracy. However, the global coordinate systems doesn't match exactly between sensor and motion analysis systems, which cause problem in the accuracy evaluation. In this paper, a method to define standardized coordination system for several measurement systems was developed. At first, two postures were measured with sensor and motion analysis system, and from these measurement data, the standardized coordinate system was defined. Then, difference between the coordination system of sensor system or motion analysis system and the standardized coordination system was calculated. The data measured from each system were recalculated in the standardized coordination, respectively. Therefore, angle measurement accuracy of sensor system was evaluated more precisely.