基於速度估測之適應型太極拳引導系統

Abstract

近年來，運動的學習除了傳統的上課學習方式外，隨著多媒體設備的發展，例如頭戴式顯示器以及搭載九軸慣性量測單元的智慧手環等等，多媒體教材在各種運動或舞蹈學習上也漸漸廣為使用。人們利用多媒體容易取得的特性，在家中可以隨時隨地自主練習。然而，多媒體教材雖然方便，卻無法達到像真人教練引導時的互動性。學習者往往要手動調整多媒體的播放進度來反覆練習，對於不熟的動作只能透過反覆回放來觀察到動作的細節，因為多媒體的播放速度往往是單一且沒有彈性的。為了解決這個問題，本論文設計了一套即時調整播放速度的太極拳學習系統。使用者會在雙手戴上九軸慣性量測單元的智慧手環，而系統會透過由智慧手環取得到的加速度數據來辨識使用者打到哪個動作，藉著辨識出來的動作與教練當下的動作計算出兩者之間時間的差距，而做出播放速度的調整。當差距越大時，調整的幅度也會越大，讓使用者能在最符合自己學習程度的速度之下進行練習，進而增加學習時的效率。論文最後進行了使用者研究，結果顯示即時速度調整的學習系統對於初學者來說，在縮短對於虛擬教練的延遲時間上，有顯著的效果。

In recent years, traditional way is not the only way to learn exercise. We can also learn from multimedia equipment. Multimedia devices are more and more widely used in various sports and dances studies. For example, head- mounted display (HMD) and smart bracelet with nine axes inertial measurement unit (IMU), etc. People can practice exercise at home anytime by getting multimedia easily. Although multimedia teaching materials are convenient, they cannot achieve the interactive like a real instructor. Learner usually needs to adjust play speed of multimedia by hand when practice repeatedly. Since the play speed of multimedia is frequently unitary and without elasticity, learner can only replay many times to observe the details of unfamiliar movement. To solve this problem, this thesis designs a set of TCC learning system which can adjust play speed immediately. The user will wear smart bracelet with IMU for both hands, and the system will identify which action the user hits by using acceleration data obtained from smart bracelet. The system will calculate the time gap between identifying the action and the action of the coach currently, and then adjust the play speed. When the gap is wider, the range of adjustment will be wider too. The purpose of TCC learning system is to increase the efficiency of learning; moreover, it can help the user to find the suitable speed when practicing. We proceed user study in the end of this thesis. The result shows the real-time speed adjustment learning system has conspicuous effect on shorten the time difference between beginners and virtual coach.