最小二乘拟合法在超声波测厚技术中的应用

大坝与安全 ›› 2018 ›› Issue (5): 29-.

最小二乘拟合法在超声波测厚技术中的应用

再丽娜¹，伍卫平²，范钦红³

1. 水利部综合事业局，北京，100053；2. 水利部水工金属结构质量检验测试中心，河南郑州，450044；3. 郑州辰维科技股份有限公司，河南郑州，450001

收稿日期:2018-08-03 出版日期:2018-10-08 发布日期:2018-10-08
作者简介:再丽娜（1988- ），女，新疆乌鲁木齐人，工程师，主要从事水利工程管理工作。

Application of least square fitting method in ultrasonic thickness measurement

ZAI Li- na, WU Wei-ping and FAN Qin-hong

Comprehensive Department, Ministry of Water Resources

Received:2018-08-03 Online:2018-10-08 Published:2018-10-08

摘要/Abstract

摘要： 研究了信号相关法在超声法厚度测量中回波时间差的识别计算。通过计算机模拟的方法，采用相关系数最小二乘拟合的方法进行峰值提取，对相关运算算法的精度、抗噪声能力进行了验证和比较，给出了较理想多项式拟合模型的阶数，并通过实验进行了验证。

Abstract: Recognition and calculation of echo time difference based on signal correlation method in ultrasonic thickness measurement are studied in this paper. By computer simulation, least square fitting method is used to extract the peak of correlation coefficients. Then validation and comparison of the calculation precision, anti-noise ability, stability of the algorithm are carried out. The ideal order of polynomial fitting model is given and verified by experiments.

Key words: ultrasonic thickness measurement, signal correlation method, time difference measurement, peak extraction, least square method

再丽娜，伍卫平，范钦红. 最小二乘拟合法在超声波测厚技术中的应用[J]. 大坝与安全, 2018, 0(5): 29-.

ZAI Li- na, WU Wei-ping and FAN Qin-hong. Application of least square fitting method in ultrasonic thickness measurement[J]. Dam & Safety, 2018, 0(5): 29-.