热物理激光光斑中心位置测量方法  

Thermal physical laser spot center location measurement method based on local gray mass center method

作　　者：吴新义 黄新华 WU Xinyi;HUANG Xinhua(School of Mechatronic Engineering,Jingdezhen University,Jingdezhen Jiangxi 333400,China)

机构地区：[1]景德镇学院机械电子工程学院,江西景德镇333400

出　　处：《激光杂志》2024年第6期227-232,共6页Laser Journal

基　　金：江西省教育厅科技课题(No.GJJ212821);江西省教育厅科技课题(No.GJJ212823)。

摘　　要：传统方法测量结果会受到衍射干扰造成结果出现偏差,设计了一种新的热物理激光光斑中心位置测量方法。对热物理激光光斑图像进行预处理,计算水平数值方向上的二阶微分,通过高斯函数计算阈值,实现图像增强,提取光斑位置特征,获得光斑中心位置坐标,基于局部灰度质心法获取热物理激光光斑中心位置坐标,实现热物理激光光斑中心位置测量。方法性能测试结果表明:设计的热物理激光光斑中心位置测量方法得到的各个分度台标定值下,方位变形角测量结果平均标准差为0.39,俯仰角测量结果平均标准差为0.17,均低于三种传统方法,验证了方法有效性。A new method for measuring the center position of the thermal physics laser spot has been designed,as traditional methods can cause diffraction interference and result in deviation in the measurement results.Preprocess the thermophysical laser spot image,calculate the second-order differential in the horizontal numerical direction,calculate the threshold through the Gaussian function,realize image enhancement,extract the spot position features,obtain the position coordinates of the spot center,obtain the position coordinates of the thermophysical laser spot center based on the local gray centroid method,and realize the measurement of the thermophysical laser spot center position.The per-formance test results of the method indicate that the average standard deviation of the azimuth deformation angle meas-urement results and the elevation angle measurement results obtained by the designed thermophysical laser spot center position measurement method under various indexing table calibration values is 0.39 and 0.17,both lower than the three traditional methods,verifying the effectiveness of the method.

关 键 词：热物理激光 中心定位 局部灰度质心法 图像预处理 中值滤波 

分 类 号：TN247[电子电信—物理电子学]