激光隧道断面放样方法研究

Study of laser lofting for railroad tunnel

隧道开挖技术中的放样工序目前主要用手工操作 ,难度大精度低成本高 ,需要发展激光隧道断面放样技术。本文提出的激光隧道断面放样方法 ,包括平移物镜扫描 ,光束发散角的压缩 ,扫描光点的计算机数字控制 (CNC) ,光电零位恢复装置 ,及仪器精确定位方法。理论分析和样机的试用证明这一放样方法是成功的。

In this paper we develop a laser lofting technique to replace the current manual lofting method that is more difficult,low accurate and with high cost.The laser lofting technique includes objective scanning,decreasing the beam divergence angle,computer numerical control(CNC) of scanning,optoelectronic resetting of zero and precise orientation of instrument.Theoretic analysis and experiment of prototype show that this technique is feasible.