A new optical technique to monitor joint motion using position sensitive detector

作者：Jung Gu In; Park Byung Kyu; Kim Ji Sun; Lee Tae Hee; Choi Ju Hyeon; Oh Han Byeol; Kim A Hee; Goh Bong Jun; Kim Ji Won; Lee Ki Sung; Jun Jae Hoon^*

来源：Technology and Health Care, 2015, 23(s2): S473-S480.

DOI：10.3233/THC-150984

• Human joint angle
• optical goniometer
• position sensitive detector
• rehabilitation
• range of motion

BACKGROUND: Evaluation of joint movements is essential to choose an appropriate rehabilitation protocol for a patient.
OBJECTIVE: The aim of this study is to suggest an alternative optical technique for measurement of joint angle which is convenient, inexpensive, and can be operated in real time.
METHODS: According to the principle of the triangulation method, position sensitive detector (PSD) converts reflected light signals into distance-related voltages. Various parameters were investigated to increase detection range and resolution of joint angle measurements.
RESULTS: The accuracy of the suggested optical sensor was verified by comparing with a commercial goniometer and 3D motion capture system.
CONCLUSIONS: This method can be applied to monitor recovery progress for the patient in rehabilitation and sport science.

• 出版日期2015