DVD探頭之應用-自動視準儀

Abstract

在本研究中，主要是以DVD光學讀取頭為基礎，將前方之聚焦透鏡拆除，使DVD光學讀取頭投射出一道準直光。因而，當待測物其反射面產生角度偏擺時，由光感測器得到之訊號，經過DSP處理之後，直接透過LCD顯示，即可得到角度的偏擺量。且因DVD光學讀取頭可量測雙軸之角度變化量，故可將DVD設計成一雙軸電子水平儀。若結合刀緣法，更可讓DVD光學讀取頭量測移動物體的直線度以及雙軸間之平行度。此次實驗另一重點就是全系統不透過電腦，僅使用單晶片做運算及處理。

DVD pick-up head is the backbone in our research. We remove the focusing Lens from the DVD pick-up head to collimate light. When the reflection of the object produce make a angle, there are signals got from photo detect. After the processing of DSP, the angle could be computed and displayed using LCD. A two dimension electronic level could be designed according to the variations of angle measure by DVD pick-up head. Straightness of the two axis of the moving object could be measured if knife edge is combined. The other major point of our experiment is that microchip is used to calculate and process in our system without using computer.