管道腐蚀超声波内检测管壁自动测厚算法

doi:10.3969/j.issn.0438-1157.2012.09.049

化工学报 ›› 2012, Vol. 63 ›› Issue (9): 2980-2990.DOI: 10.3969/j.issn.0438-1157.2012.09.049

管道腐蚀超声波内检测管壁自动测厚算法

戴波¹, 马明璐²

1. 北京石油化工学院信息工程学院, 北京 102617;
2. 北京化工大学信息科学与技术学院, 北京 100029

收稿日期:2012-06-19 修回日期:2012-06-28 出版日期:2012-09-05 发布日期:2012-09-05
通讯作者: 马明璐
作者简介:戴波(1962-),男,教授。
基金资助:
中国石油化工集团公司科技开发项目(J305011)。

Automatically thickness measurement method for pipeline corrosion detection of ultrasound

DAI Bo¹, MA Minglu²

1. College of Information Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
2. College of Information Science & Technology, Beijing University of Chemical Technology, Beijing 100029, China

Received:2012-06-19 Revised:2012-06-28 Online:2012-09-05 Published:2012-09-05
Supported by:
supported by the China Petrochemical Corporation Technology Development Project(J305011).

摘要/Abstract

摘要： 管道腐蚀超声波内检测具有数据量大、干扰多的特点,其自动测厚算法要求适应性强,但各类超声波检测数据处理算法用于管道内检测自动测厚时存在误判率高、精度较低、耗时长等缺点。针对此问题,本文首先提出了基于两步法的一次FFT自动测厚算法;对其存在的误判率高的问题,提出了二次FFT自动测厚算法;对二次FFT算法精度降低的问题,提出了改进的二次FFT自动测厚算法。理论分析和各类实验证明,该算法具有一次FFT自动测厚算法精度高和二次FFT自动测厚算法误判率低的特点,较好地实现了管道腐蚀壁厚自动测量。

关键词: 超声检测, 自动检测系统, 管道腐蚀, 二次FFT

Abstract: The automatically thickness measurement method for pipeline corrosion detection of ultrasound, which has the significant features as large amount of data and much interference, is required high adaptability.However, many algorithms for pipeline corrosion detection of ultrasound have many defects, such as high misdiagnosis rate, low accuracy or more time-consumed.For solving this problem, the two-step method which is based on FFT is proposed in this paper.Firstly, twice FFT algorithm is researched for solving high misdiagnosis rate problem.Secondly, the improved twice FFT method is presented to solve the low precision of traditional twice FFT method.The theoretical analysis and experiments shows that the presented method has high precision and low misdiagnosis rate which is the same as FFT and twice FFT respectively.The automatically thickness measurement for pipeline corrosion detection of ultrasound can be realized by this method.

Key words: ultrasonic inspection, autonomous system, pipeline corrosion, twice FFT

中图分类号:

TE973.6

戴波, 马明璐. 管道腐蚀超声波内检测管壁自动测厚算法[J]. 化工学报, 2012, 63(9): 2980-2990.

DAI Bo, MA Minglu. Automatically thickness measurement method for pipeline corrosion detection of ultrasound[J]. CIESC Journal, 2012, 63(9): 2980-2990.

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管道腐蚀超声波内检测管壁自动测厚算法

Automatically thickness measurement method for pipeline corrosion detection of ultrasound

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[1]	戴波马明璐. 管道腐蚀超声波内检测管壁自动测厚算法[J]. CIESC Journal, 2012, 0(0): 0-0.
[2]	戴波;赵晶;周炎. 基于支持向量机的管道腐蚀超声波内检测 [J]. CIESC Journal, 2008, 59(7): 1812-1817.