自己測試下半季用球反彈係數 - 棒球
By Kumar
at 2020-09-13T21:38
at 2020-09-13T21:38
Table of Contents
毛遂自薦一下,家係下巴辣,這裡我們自己做的反彈係數實驗!
之前上半季時候有版友分享到版上,也引起一些討論,這次我們選擇自己分享上來給各位參考!
當然,上下半季的反彈係數還是有差的。
而因為我們有接觸到一些選手聊過,他們有在說這次的球有的比較軟有的比較硬,所以這次我們只用兩顆測試可能還是少了一些,不過官方商城球真的太貴了啦!
上次測試的時候有幾個地方比較有討論
1.測試球太少
這真的有點困難,要全新的就得在中職商城購買,一顆600要上下半季各買6顆真的太貴了,所以這次我們還是維持各買兩顆,並且跑T檢定觀察球與球之間的差異明不明顯。
2.球是舊的
這次我們從官網商城直接購買,並且放在除濕機上方維持50%左右的濕度接近一個月。
這次測試我們使用三輪發球機發58麥的球打向白樺木牆(mlb方法)與鋼板(中職方法),並且用960幀的相機拍攝入射與反射速度。
而為了未來每季的測試我們也特別寫了一個程式去批次運算素材,希望這個測試與未來的測試能有更多的參考價值,並且讓反彈係數不只是只能等聯盟公佈球迷才能知道!
附上連結
https://youtu.be/Zq5d9r1LBnw
希望各位給我們建議與引起討論,讓之後的測試可以更好!
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Sent from JPTT on my iPhone
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Tags:
棒球
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