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題名 | 網線張力對大拍面軟式網球拍彈性恢復係數之影響=The Effect of COR due to Various String Tension and Over-Size Racket in Soft Tennis |
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作者 | 石翔至; 李秀華; Shih, Hsiang-chih; Li, Hsiu-hua; |
期刊 | 南亞學報 |
出版日期 | 20040800 |
卷期 | 24 2004.08[民93.08] |
頁次 | 頁282-289 |
分類號 | 528.953 |
語文 | chi |
關鍵詞 | 軟網; 網球拍; 拍面; 張力; Soft tennis; Racket size; String tension; COR; |
中文摘要 | 本研究之目的在探討不同網線張力對大拍面的軟式網球拍部撞後彈性恢復係數的影響。將實驗的網球拍握把柄固定在虎頭鉗鋏上,調整網球發球機所射出之球與網球拍做正面垂直碰撞,再由Nac高速攝影機以每秒1000張之拍攝速度將整個實驗過程拍攝,並配合Peak Performance的軟體,將所拍攝到的錄影帶資料以數位化處理,並將所資料加以統計處理。結果顯示如下: 1. 由不同網線張力對大拍面的軟網球拍部撞後COR的表中,可顯示出不同的網線張力(30、35、40磅)的COR值各為0.427、0.426及0.433。 2. 不同的網線張力對碰後彈性恢復係數COR的圖中,可顯示出在網線張力40磅COR值為最高。 |
英文摘要 | The purpose of this study was to investigate the effect of racket size and string tension and on the coefficient of restitution (COR) for soft tennis rackets. In order to get accurate results, the racket was fixed with the clamp and the tennis ball was controlled to impact the racket vertically. The whole experimental procedure was filmed by NAC high speed camera at the rate of 1000 frame per second. The video tape was digitized using Perk Performance System, and the data were then analyzed with two-way ANOVA. The result of this study were summarized as followed: 1. For soft tennis oversize racket. The string tension has no significant effect on the COR value, but racket size has significant effect on the COR value. 2. The COR value of 40lb string tension racket was significantly higher than of those other string tension for soft tennis. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。