- 學位論文
無線動作擷取器於互動式虛擬實境之研發
Development of Wireless Motion Capture for Interactive Virtual Reality
摘要
本篇論文研究重點在於以低成本數位訊號處理器 ( dsPIC )、三軸加速規、與無線傳輸模組，開發互動式虛擬實境的無線動作擷取器，以取代傳統有線動作擷取器的不方便性與高價位。 在實驗方面，首先利用三軸加速度規訊號作二次積分後，作為動作的訊號，並應用 dsPIC 的類比/數位轉換器，將其三軸類比訊號依序轉換數位訊號後由無線發射器輸出，此輸出訊號由無線接收器接收，再經由 dsPIC 做訊號處理並傳送至電腦，因此完整三軸運動訊號得以應用於互動式虛擬實境中。 在虛擬實境中，我們利用一個簡單蜜蜂追逐人的遊戲表達無線動作擷取器的實用功能，並且應用滑動控制理論來設計蜜蜂即時追蹤控制器，以考量蜜蜂的動態行為。由此互動式遊戲應用可以表達出低成本無線動作擷取器的可能性與未來。
並列摘要
The purpose of this thesis is to develop a wireless motion capture applied in an interactive virtual reality game, using low-cost devices such as digital signal processor (dsPIC), accelerometer and wireless transceiver. Disadvantage of traditional wired motion capture with inconvenience use and high expense can thus be eliminated. In the experiments, motions can be captured by the three-axis accelerometer after integrating the signals twice. The motion signals are then processed by the dsPIC via the A/D converter and sent to the wireless transmitter. The wireless receiver picks up the motion signals and sends the signals to another dsPIC for communication with a PC. Hence, the 3-D motions can be correctly obtained for use in the interactive virtual reality game. In the virtual reality, a simple game of bee chasing a human is used to demonstrate the effectiveness and validity of the developed wireless motion capture. Meanwhile, on line tracking strategy of the bee is based on the sliding mode controller in consideration of the dynamic behavior of the bee.