激光技术2024，Vol.48Issue(4)：590-596,7.DOI:10.7510/jgjs.issn.1001-3806.2024.04.019
激光焊OCT熔深测量去噪及数据拟合方法研究
Study of OCT weld depth curve fitting method for laser keyhole welding
摘要
Abstract
In order to solve the online detection of laser welding depth of fusion and to solve the problem of optical coherence tomography(OCT)depth of fusion detection signal noise,a percentile filtering plus moving average algorithm was used to fit the weld depth curve.The weld depth of 304 stainless steel keyhole welding process was detected online by optical coherence photomicrographic imaging system,in the process of extracting the percentile depth curves from the original scatter data using percentile filtering;it was found that there were spikes interfering noises in the percentile depth melting curves extracted by this method,and the percentile depth curves were processed by low-pass filtering through the moving average algorithm,and the OCT weld depth curves were finally extracted and fitted from the original scatter data.The results show that,comparing the OCT weld depth curve with the actual weld depth curve on the longitudinal surface of the weld,the measurement accuracy of the OCT depth of fusion curve obtained by this method has been improved by 15％at most.The method is effective in extracting and fitting more accurate OCT weld depth curves from the original scatter data.关键词
激光技术/熔深测量/光学相干光层析成像/百分位滤波/移动平均Key words
laser technique/weld depth monitoring/optical coherence tomography/percentile filter/moving average分类
信息技术与安全科学引用本文复制引用
黄贻蔚,高向东,李来明,马波,张艳喜..激光焊OCT熔深测量去噪及数据拟合方法研究[J].激光技术,2024,48(4):590-596,7.基金项目
国家自然科学基金资助项目(52275317) （52275317）
广东省自然科学基金资助项目(2023A1515012172) （2023A1515012172）
广州市科技计划资助项目(2023B03J1326) （2023B03J1326）
