원문정보
초록
영어
Recently, as a result of advances in technology, micro-electro-mechanical system (MEMS)-based inertial measurement units (IMUs) have frequently been used for human motion analyses. While the output signal from an IMU is based on the sensor coordinate system (CS), it is necessary to express the signal in the body segment CS for clinical meaning. The offset between the sensor CS and anatomical CS needs to be determined. In this study, a calibration method that determines the orientation offset between a body segment and an IMU attached to the body segment was proposed. The angular velocity was measured while the body segment was rotated and processed using a principle component analysis to form the basis of the orientation offset. The proposed method was applied to calibrate an IMU attached to the forearm and evaluated for five young healthy subjects. Its performance showed reasonable repeatability (mean < 1.4°, SD < 0.8°).
목차
1. Introduction
2. Calibration Method
2.1. Inertial Measurement Unit
2.2. Coordinate System of Forearm
2.3. Anatomical Calibration Method
3. Performance Evaluation
3.1. Method Subjects and Experimental Protocol
3.2. Basis Repeatability
3.3. Angle Repeatability
4. Conclusion
Acknowledgements
References