基于单目视觉的堆芯组件间距测量技术研究  

Research on the Accurate Measurement Technology for the Spacing between Core Fuels Based on Monocular Vision

作　　者：谢晨江 许小进[1] XIE Chengjiang;XU Xiaojin(State Nuclear Power Plant Service Company,Shanghai 200233,China)

机构地区：[1]国核电站运行服务技术有限公司,上海200233

出　　处：《机械工程师》2020年第10期93-95,共3页Mechanical Engineer

基　　金：国家重大科技专项“大型先进压水堆及高温气冷堆核电站”课题“CAP1400燃料组件定位、测量和变形纠正技术研究”(2015ZX06002005)。

摘　　要：为验证堆芯复查期间通过单目视觉测量燃料组件间距精度,搭建测试平台,按照比例绘制模拟堆芯图。摄像机按照规划的运动轨迹拍摄模拟堆芯图片,通过标定求解摄像机内参数、外参数和畸变参数,将校正参数代入摄像机数学模型并对拍摄图片进行匹配,求解相邻组件上管座间距和组件高差值。将间距测量结果同模拟堆芯图组件已知间距比较,测量误差小于0.42 mm。测量结果显示精度在允许范围内(小于0.5 mm),验证了堆芯复查期间通过单目视觉测量燃料组件间距的可行性。To verify the measuring accuracy of fuel assembly's space using monocular vision method during core mapping,a test platform and core simulation is set up.A sequence image is captured following a designed moving tail using a camera fixed on the test platform.The mathematic model of the camera will be involved with the parameters such as distortion parameter,intrinsic parameters and extrinsic parameter matrixes.The sequence image is matched with a template picture to calculate the distances and relative heights between fuel assemblies based on the mathematic model.The measurement error is less than 0.42 mm compared with the actual values.The result indicates that it is feasible to measure the distances and relative heights between fuel assemblies using monocular vision method during core mapping.

关 键 词：燃料组件 单目视觉 间距 视觉测量 高差 

分 类 号：TL352[核科学技术—核技术及应用]