Title

慣性感測器應用於羽球正拍切球之球拍振動分析

Translated Titles

Inertia Sensor Applied to Badminton Forehand Drop Shot Vibration Analysis

DOI

10.6829/STU.2013.00079

Authors

黃炳璋

Key Words

加速規 ; 頻譜分析 ; 振動響應 ; 總功率 ; 角度 ; accelerometer ; spectrum analysis ; vibration response ; total power ; ,angle

PublicationName

樹德科技大學資訊工程系碩士班學位論文

Volume or Term/Year and Month of Publication

2013年

Academic Degree Category

碩士

Advisor

吳鴻志

Content Language

繁體中文

Chinese Abstract

目的:探討使用慣性感測器,分析女子優秀和次優秀選手群在羽球正拍切球的球拍振動的加速度和差異分析。方法:以右手持拍之10位全國個人排名賽羽球選手為研究對象(年齡16.1±2.18歲,身高161.6±3.2公分,體重54.9±3.14公斤,球齡7.5±2.17年)。將無線慣性感測器(內含三軸加速規,取樣頻率為3333Hz)放在實驗球拍上,並搭配高速攝影機和測速槍,於選手擊球時以擷取重覆20次球拍振動資訊,並利用頻域分析、時域分析、振動時間、擊球點,作統計差異性分析。結果:1.發現同一選手球拍在有無裝置慣性感測器t檢定時,無顯著差異。2.優秀選手群球速比次優秀選手群球速較快且有顯著差異。3.球拍頻譜振幅次數分析比較,優秀選手擊球點平均都高達7次以上擊中適當區域,明顯比次優秀選手來的穩定。4.頻譜分析中,Y軸向(側向方向)優秀選手在78~156Hz之間較大的振幅,次優秀選手則無,Z軸向(向前方向)優秀選手在78~195Hz之間較大的振幅,次優秀選手則無。5.球拍加速度的頻域最大值、平均值、總功率比較分析,優秀群與次優秀群中有顯著差異。6.在三軸向優秀選手群球拍振動時間低於次優秀選手群且有顯著的差異。7.球拍加速度的時域分析,最大值、最小值及總功率,經檢定後優秀選手群與次優秀選手群三軸向都有顯著差異,且優秀選手群值大於次優秀選手群值。8.優秀群與次優秀群選手在擊球瞬間Pitch(ρ)角度分別為12.29度和12.04度,無顯著差異;Roll (ϕ)角度分別為55.01度和47.45度,有顯著差異;Theta (θ)角度分別為56.81度和59.3度,無顯著差異。結論:1.球拍裝置無線慣性感測器不太會影響選手的擊球動作。2.優秀選手群球速比次優秀選手群球速較快有顯著差異。3.在X、Z軸中優秀選手群的振動頻率比次優秀選手群的振動頻率較明顯,Y軸中優秀選手群或是次優秀選手群,沒有明顯的振動頻率。4.優秀選手群在擊球後握拍即刻放鬆,而次優秀選手群仍緊握拍未適時放鬆。5.優秀與次優秀選手球拍加速度頻域最大值、平均值、總功率有顯著差異,X軸向(向上方向)是相差值最大。6.由X和Z軸向得知,優秀選手群在擊球過程往前下方壓的加速度是比次優秀選手群來的快。建議:本實驗分析數據中,擊球時的X和Z軸向加速度及角度,可提供相關資訊給專業教練做未來訓練選手的參考模型。

English Abstract

Goal: to study to apply the inertia sensor in analyzing the acceleration of badminton forehand drop shots of the female top players. Method: The subjects of the study are ten right-handed National Personal Ranking Competition Badminton players (aged 16.1 ± 2.18 years, height 161.6 ± 3.2 cm, weight 54.9 ± 3.14 kg, ball age 7.5 ± 2.17 years). The study applied wireless inertial sensor (including triaxial accelerometers, the sampling frequency is 3333Hz) on experimental rackets, and with a high-speed camera and speed gun to retrieve the information of the racket vibration when the players repeatedly hit the ball 20 times, and used frequency domain analysis, time domain analysis, vibration time, ball points to analyze the statistical differences. Result: 1.The study found that there was no significant difference in t-test when the same player used the racket was with or without inertial sensors. 2.There was a significant difference that the ball speed of the best players were faster than that of the second best players. 3.To compare the racket amplitude frequency spectrum analysis, the average of the best players’ batting point in appropriate areas was more than seven times, which was significantly stabler than the second best players. 4.In the spectrum analysis, in the Y-axis direction (lateral direction), the best players had more amplitude in 78~156Hz but the second best players did not. In the Z-axis direction (forward direction), the best players had more amplitude in 78~195 Hz but the second best players did not. 5.There were significant differences between the best players and second players in the frequent area analysis of the maximum, average, total rated power of the racket acceleration. 6.There was a significant difference that in the racket vibration time in three axises , the best players’ was lower than the second best players’. 7.There were significant differences between the best players and second best players in the time-domain analysis of the maximum, average, total rated power of the racket acceleration in triaxial and the values of the best players were greater than them of the second best players. 8.The Pitch angle (ρ ) for the best players refers to 12.29 and that for the second best players refers to 12.04. There is little difference. As for the Roll (ϕ) angle, their performance refers to 55.01 and 47.45 respectively. There is substantial difference. As for Theta (θ) angle, their performance refers to 56.81 and 59.3 respectively. There is little difference. Conclusion: 1.The Racket with wireless inertial sensors would not affect the player’s hitting performance. 2.There was a significant difference that the ball speed of the best players was faster than the second best players. 3.In the X-axis and Z-axis, the vibration frequency of the best players was more obvious than that of the second best players. In the Y-axis, there was no obvious vibration frequence among the best and second best players. 4.The best players would loosen the grip of the racket after hitting balls, while the second best players would not. 5.There were significant differences between the best players and the second best players in the maximum, average, total power rate of the racket acceleration, and the X-axis direction (upward direction) was the most differently valued. 6.The study found that from the X-axis and Z-axis, in the hitting process, the best players accelerated the pressing down faster than the second best players did. Suggestion: The analysis of the experimental data about the X-axis and Z-axis acceleration and angle when hitting balls may offer relevant information and modals to professional coaches for training players in the future.

Topic Category 基礎與應用科學 > 資訊科學
資訊學院 > 資訊工程系碩士班
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