基于小波分析的板形三维扫描重构研究
Research on 3D Scanning Reconstruction of Plate Shape Based on Wavelet Analysis
蔡书楠 1周健 1高兴文 1赵德明 1沈芳明 2张金建2
作者信息
- 1. 浙江理工大学机械工程学院,浙江杭州 310018
- 2. 浙江永正锂电股份有限公司,浙江衢州 324012
- 折叠
摘要
为提高基于压延工艺生产的锂箔检测效率及能力,提出一种基于小波分析的板形三维扫描重构技术.采用激光位移传感器结合扫描式板形测量方法,实现锂箔板形特征点的快速、高精度的数据采集.以小波分析为基础,对粗大误差剔除后的激光测距仪扫描测量数据使用小波系数阈值去噪,实现对数据的降噪,同时保持原始测量数据的完整性.最后通过逐点插入法,实现板形的重构.采用三坐标测量法和所提出的激光扫描式板形重构检测法对同一轧件进行测量并对比,结果显示两者的最大极差为0.004 mm;利用所提出的检测法对同一轧件进行6次重复性检测,结果显示最大标准差为0.001 47 mm,重复性误差小于±0.003 mm.研究结果验证了所提出的激光扫描式板形重构检测法具有较高的精度和一致性,满足锂箔检测的要求.
Abstract
To enhance the efficiency and capability of lithium foil detection based on the rolling process,a three-dimensional scanning and reconstruction technique based on wavelet analysis is proposed.This technique employs a laser displacement sen-sor combined with a scanning plate measurement method to achieve rapid and highly accurate data collection of the lithium foil's shape characteristics.Building upon wavelet analysis,the laser rangefinder scanning measurement data,after removing gross errors,is subjected to wavelet coefficient threshold denoising,accomplishing noise reduction while preserving the integrity of the original measurement data.Finally,the shape is reconstructed using a point-by-point insertion method.Measurements of the same rolled piece using both the three-coordinate measurement method and the laser scanning plate reconstruction detection method proposed in this paper are compared.The results indicate a maximum difference of 0.004 mm between the two meth-ods.Utilizing the detection method proposed in this study,six repeatability tests were conducted on the same rolled piece,showing a maximum standard deviation of 0.001 47 mm and a repeatability error less than±0.003 mm.The research results validate that the laser scanning plate shape reconstruction detection method proposed in this paper has high precision and consis-tency,meeting the requirements for lithium foil detection.
关键词
锂箔检测/小波分析/扫描重构技术/激光位移传感器/逐点插入法Key words
lithium foil detection/wavelet analysis/scan refactoring techniques/laser displacement sensor/point-by-point insertion引用本文复制引用
基金项目
国家自然科学基金青年基金(51805488)
出版年
2024
NETL
NSTL
万方数据