基于数据融合的脉冲涡流厚度测量方法

发布时间：2018-04-10 05:28

本文选题：脉冲涡流　切入点：厚度测量　出处：《中国测试》2017年08期

【摘要】：在脉冲涡流检测中,通常使用响应信号的特征值,如峰值时间、峰值等来测量材料的厚度或缺陷的深度。该文提出一种新的测量方法对几何参数和材料电磁参数进行分离,实现厚度的测量。把被测对象的厚度被划分为一系列的标准厚度,每累加一次厚度,就会有一个对应频率的激励信号。由于脉冲激励信号拥有丰富的频率信号,可以用来作为厚度的扫描信号。通过对这些信号的分析,当扫描信号对应的厚度大于等于被测厚度时,该信号和参考值有很大区别,可以进行厚度测量。另外,为提高检测精度,引入数据融合的方法来综合数据信息,从而提高方法性能。
[Abstract]:In pulsed eddy current testing, the characteristic values of response signals, such as peak time and peak value, are usually used to measure the thickness of materials or the depth of defects.In this paper, a new measuring method is proposed to separate the geometric parameters from the electromagnetic parameters of materials and to measure the thickness.The thickness of the measured object is divided into a series of standard thickness. Each time the thickness is accumulated, there will be an excitation signal corresponding to the frequency.Because the pulse excitation signal has abundant frequency signal, it can be used as the thickness scanning signal.Through the analysis of these signals, when the thickness of the scanning signal is greater than or equal to the measured thickness, there is a great difference between the signal and the reference value, which can be used for thickness measurement.In addition, in order to improve the detection accuracy, data fusion method is introduced to synthesize the data information, thus improving the performance of the method.
【作者单位】：云南省计量测试技术研究院;电子科技大学自动化工程学院;
【分类号】：TB921

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