| Summary: | 碩士 === 義守大學 === 生物醫學工程學系 === 100 === Vibration arthrometry is found to be helpful for physicians to distinguish the knee joint disorders. In previous studies, most vibration signals are recorded during joint flexion and extension movements in subjects who are in a sitting position without actual weight loading on the knee joint. Thus, the purpose of the thesis was to set up a multiple channel wireless system in order to detect vibration signals on the knee joint surface, when the knee joint was really in weight-loaded situations. In the system, we designed three vibration modules for detecting the three vibration signals from the knee joint surface (mid-patella, lateral condyle, and medial condyle), and one angle module for sensing the joint angle. The analog vibration and angle signals were transmitted and received using ZigBee modules, and then sent to a personal computer via RS-232. To validate the feasibility of the developed system, we performed four experiments, including the active and passive swing movement in sitting position, the normal walking with body weight, the up-down step movement with body weight, and the split jump movement action with body weight. Through the four experiments, the system was shown to be capable of simultaneously recording three-channel vibration signals and one-channel joint angel signal. In summary, the multiple channel wireless system proposed in the thesis may be helpful for early detection of knee joint disorders, especially for osteoarthrosis.
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