傅里叶变换轮廓术的小电流钨极氩弧焊熔池表面高度测量  

Altitude Measurement of Low Current Tungsten Inert Gas Weld Pool Surface with Fourier Transform Profilometry

作　　者：魏昇[1] 范定寰[1] 刘南生[1] 魏义庆[1] 艾孝谱[1] 胡仙[1] 

机构地区：[1]南昌大学理学院物理系,南昌330031

出　　处：《光电工程》2013年第3期56-61,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(50565003;51065020)

摘　　要：采用傅里叶变换轮廓术来测量小电流钨极氩弧焊熔池表面高度,分析了表面高度与位相改变的对应关系,研究了电弧焊熔池液态金属的反射特性、熔池震荡及其对光束的漫反射效应,利用这种漫反射效应,通过搭建的熔池表面高度测量装置,拍摄到小电流钨极氩弧焊移动熔池的变形光栅条纹,经过计算机图像处理和位相高度转换,获得表面高度分布。研究表明,傅里叶变换轮廓术可用于小电流钨极氩弧焊熔池表面高度测量。A novel three-dimensional shape measurement method is presented for low current tungsten inert gas welding pool surface, based on fringe reflection and Fourier Transform Profilometry （FTP）. The relationship between surface height and phase variation has been demonstrated. Reflection character of liquid metal on welding pool surface and scattering function result from molten pool concussion have been discussed with the purpose of taking the picture of reflected deformed laser stripes by means of pool height measurement device. The obtained deformed laser stripes of low current tungsten inert gas weld pool surface were processed by computer to acquire pool surface height. An experiment has been done to demonstrate that Fourier transform profilometry is suitable for three-dimensional shape measurement of three-dimensional shape measurement.

关 键 词：钨极氩弧焊 熔池震荡 表面高度 傅里叶变换轮廓术 

分 类 号：TN247[电子电信—物理电子学]