在激光扫描法尺寸测量系统中，激光能量必须保持稳定。
In the system of size measurement by laser scanning, it is necessary to keep laser energy stability.
利用反求工程可以实现修复体的三维重建，激光扫描法可以快速收集修复体的三维表面信息，精度高，并且没有测量盲区。
Reverse Engineering can be used to reconstruction the prosthesis. The 3d surface information of the prosthesis can be collected by the laser scan system and there is no blind area.
本文针对水轮机修复专用机器人视觉系统，采用基于三角测量原理的主动视觉法中的激光扫描法对水轮机转轮叶片缺陷进行检测。
The paper adopts laser scanning of the method of positive vision basing on the principle of triangle measure to detect the drawback of hydraulic turbine blade.
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