乒乓球發球機之設計與製作

Abstract

乒乓球發球機在現今的社會已經十分普遍，但價格都不便宜，所以本專題將嘗試利用微處理機來控制馬達，然後，製作一個簡易型的發球機。希望能以較低的成本，來達到同樣的成果，讓更多想學習與練習的人，能夠買到這運動器材，在家中也可以達到單人練習的享受與成效。 我們製作的發球機主要是利用一個集球桶，把球放入集球桶內，球會順著齒輪圓盤進入發球管，運用馬達來控制齒輪圓盤送出的球數，球順著導管進入到發球管，再藉由馬達接上小輪子，再運用8051單晶片去控制馬達的轉速，將球發射出去，可以依個人喜好調整速度由慢至快，慢則給初學者練習，快則使人擁有對手一樣，且有簡易式的調整按鈕，讓使用者用起來更為方便簡單，共有0~9不同的球速，運用馬達轉速來控制球速，依序愈來愈快，選用最適合的球速，可讓你球技精進，強身練體。

Nowadays, table tennis serving machine is very common but not cheap. The main aim of this project is to design and implement a table tennis seving machine based on a microcontroller. Consequently, it can reach the same effects with the effective cost. Since it is a simple and cheap device, most of people can afford as well. The table tennis serving machine designed in this project is composed of a bucket and a microcontroller-based motor drive. The balls are placed in the bucket and pushed along the gear to a tube. We use the motor to control the gear. There is another motor equipped with a plastic wheel located on the top of the tube. We use 8051 microcontroller to control the speed of motor and shoot the balls. For convenience, there is a simple switch which can control nine speed from low to fast. People can choose the speed to improve skill.