基于物理水平基准的组合式高程测量方法  

Combined elevation measurement method based on physical horizontal reference

作　　者：王清和 赵国柱 马国鹭[1] 朱目成[1] 宗建宇 王立斌 彭小武 WANG Qinghe;ZHAO Guozhu;MA Guolu;ZHU Mucheng;ZONG Jianyu;WANG Libin;PENG Xiaowu(College of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;Aerospace Technology Institute,China Aerodynamics Research and Development Center,Mianyang 621010,China)

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010 [2]中国空气动力研究与发展中心空天技术研究所,四川绵阳621010

出　　处：《应用光学》2024年第1期150-157,共8页Journal of Applied Optics

基　　金：国家自然科学基金(61505169)。

摘　　要：针对空间坐标点相对于测量基准的高程测量准确性问题,提出一种基于物理水平基准的组合式高程测量方法。利用激光三角测量原理及其测量光路的几何特性,搭建了物理水平基准的高程测量系统,在朗伯散射光场中,分析了倾角变化对激光光能质心偏移量的影响,建立了相应的误差修正模型,利用倾角传感器实现了高程测量的倾角误差补偿,自主研制了标定平台对本文提出的高程测量系统进行标定验证试验。结果表明:本文提出的组合式高程测量方法能够在500 mm测量量程下将重复性测量误差控制在±20μm的波动范围内,相较于单一激光位移传感器测量方式,其组合式高程测量误差波动量大幅度降低,能够适应空间坐标点在任意姿态下的精准测量,有效改善激光位移传感器在高程测量领域的性能,使其测量结果更为真实有效。In response to the issue of accuracy in measuring the elevation of spatial coordinate points relative to a reference point,a new combined elevation measurement method based on a physical horizontal reference plane was proposed.By utilising the concepts of laser triangulation and leveraging the geometric features of measuring light pathways,a high-precision elevation measurement system was built.This technique employed a physical horizontal reference.Within a Lambertian scattering light field,an analysis was done to determine the influence of tilt angle modifications on the centroid displacement of laser energy.An related error correction model was built,which permitted tilt angle error compensation for elevation data by the use of a tilt angle sensor.Additionally,an autonomously constructed calibration platform was deployed for verification studies targeted at calibrating the suggested elevation measuring system.The findings demonstrate that the proposed combined elevation measurement method achieves a repeatable measurement error within a fluctuation range of±20μm across a 500 mm measurement range.Compared to the measurement methodology of single laser displacement sensor,the combined elevation measurement method greatly reduces the fluctuation of measurement errors.It is capable of supporting precise measurements of spatial coordinate points in any orientation and effectively boosting the performance of laser displacement sensors in the area of elevation measurement,consequently giving more genuine and effective measurement results.

关 键 词：测量与计量 激光位移传感器 朗伯定律 误差修正 不确定度分析 

分 类 号：TN206[电子电信—物理电子学] TH744[机械工程—光学工程]