李召阳 Li Zhaoyang, 李中梁 Li Zhongliang, 南楠 Nan Nan, 刘腾 Liu Teng, 杨晨铭 Yang Chenming, 万新军 Wan Xinjun, 张以恒 Zhang Yiheng, 王向朝 Wang Xiangzhao
{"title":"基于偏振OCT的激光焊接匙孔深度测量方法","authors":"李召阳 Li Zhaoyang, 李中梁 Li Zhongliang, 南楠 Nan Nan, 刘腾 Liu Teng, 杨晨铭 Yang Chenming, 万新军 Wan Xinjun, 张以恒 Zhang Yiheng, 王向朝 Wang Xiangzhao","doi":"10.3788/cjl230449","DOIUrl":"https://doi.org/10.3788/cjl230449","url":null,"abstract":"激光焊接的熔融深度即匙孔深度能够表征焊缝的结合强度,反映焊接质量。光学相干层析成像技术(OCT)能够在焊接过程中无损测量匙孔深度。但是OCT探测光束在匙孔内的多重反射会导致测量结果不能准确反映待测深度。针对该问题,采用基于偏振OCT的匙孔深度测量方法,消除多重反射光的影响,提高测量的准确性。将圆偏振光入射至待测匙孔得到OCT信号,计算出带有匙孔深度信息的附加相位差图像,利用附加相位差对信号进行筛选,去除多重反射导致的错误深度,得到待测匙孔的真实深度。使用所提方法对铝制匙孔样品进行测量,得到的匙孔深度测量误差为1.6%,而常用的百分位滤波方法的测量误差为23%。实验结果证明了所提方法的有效性。","PeriodicalId":47922,"journal":{"name":"CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}