雷射量測路徑規畫與即時曲面量測系統開發

自1986年之後，第一部應用雷射位移計測距的量測系統問世之後，關於這方面的研究持續地蓬勃發展。一般雷射量測系統受限於雷射位移計有效量測範圍，量測路徑規畫，資料擷取方式等因素，大部分雷射量測系統之量測速度都很慢，容易碰撞量測工件，且只能量針對前訴之缺點，本文提出應用比較式暫存器預定位置觸發功能及類比/數位器自由起動功能擷取物體表面資料，輔以智慧式路徑規畫法以提高量測速度及避免系統碰撞量測工件。系統架構包括386工業級電腦、自組工作平台，PC-based定位控制器，油壓控制板，雷射位移計等。系統操作程式架構在共工即時核心之上，負責量測路徑規畫、資料存取，並將量測資料隨時以檔案之形式存入硬碟，以供CAD運用。為驗證本論文方法，實驗選用之量測工件，其表面高度落差值超出雷射位移計可量測範圍兩倍多，部分曲面斜度接近90度。由量測結果知，相較於一般量測系統，本實驗之量測速度有突破性之改進，量測精度亦能符合要求，且無碰撞量測工件之虞。

關鍵字

雷射量測；路徑規畫

並列摘要

Since 1986 the first coordinate measurement machine with a laser displacement sensor appears in the market, numerous researchers devote themselves to improve the measurement speed and accuracy of the laser coordinate measurement machine. The laser measurement machines is suffered from the limited measurable range of the laser displacement sensor, once the laser probe too close the workpiece, the probe risks the danger of colliding with the workpiece. Besides this, the measurement speed is very slow, that toomplete the measurement of a large workpiece would spend quite a long time. To overcome the aforementioned shortcomings, this thesis presents a methodology which uses a hardware register to trigger the measurement of the displacement sensor at preset positions along the measurement path on a workpiece surface, and a recursive descending algorithm to avoid workpiece collision. Therefore, the measurement system can measure the surface height data "on the fly" with a high velocity. The complete measurement sysm is based on one Intel 30S386 industrial computer, an X-Y-Z table and a laser displacement sensor. In order to verify the proposed methodology, a sculptured surface with a surface depth twice more the laser displacement sensor measurable range is measured. In comparison with the conventional laser measurement machine, the measurement speed of our experimental system is much higher without sacrificing accuracy.

並列關鍵字

laser measurement ； path planning

國際替代計量

雷射量測路徑規畫與即時曲面量測系統開發

主題瀏覽