射箭運動是一項自控性很強的個人運動項目，選手除了肌肉力量的全面發展之外，保持各種動作的穩定平衡平穩及流暢也是必要的。因此在射箭場上，選手在箭離弓弦的那一瞬間，穩定性的維持往往是比賽勝負的關鍵，也是每一個選手努力的目標。本研究主要是設計一套用以量測射箭選手的震顫之輔助訓練系統，主要來探討震顫的產生對選手成績表現的影響有多大?我們將以加速度計來當作量測震顫信號的感測器，將選手手持弓顫抖產生的加速度變化，經過訊號的處理來探討選手從瞄準到放箭的瞬間，持弓手的穩定度和成績之間的差異。並且利用加速度計的靈敏性可以清楚的看出選手射箭流程的瑕疵，藉由系統的量測可以改善選手細微動作的姿勢修正，以提供教練與選手長期訓練的方向。

　　Archery is a kind of sport that requires precise self-control. An archer needs strong and steady arms to maintain stability and equilibrium in every movement. Thus, the key to win a game in a contest relies on the stability when releasing the arrows, which is considered as the decisive moment. It becomes the goal for every archer to keep stable at that instant moment. This study aims to design a supplementary system to help to measure the tremor in a single shot by an archer, so as to examine the correlation between the degree of the tremor and the performance. We will use accelerometers as sensors to measure signals of tremor and transform those acceleration signals into audible sounds based on our own algorithmic method. We will use the accelerator as the sensor to detect and record the variation of the velocity of arrows in terms of different levels of tremor. After processing the signals, we may study the performance of different excellence resulted from different degrees of tremor. With the benefit of sensitivity of accelerators, we can analyze the whole process from drawing to release to find out flaws in posture and provide useful information on training.

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