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  本文選題：脈沖渦流　切入點：厚度測量　出處：《中國測試》2017年08期

【摘要】：在脈沖渦流檢測中,通常使用響應(yīng)信號的特征值,如峰值時間、峰值等來測量材料的厚度或缺陷的深度。該文提出一種新的測量方法對幾何參數(shù)和材料電磁參數(shù)進行分離,實現(xiàn)厚度的測量。把被測對象的厚度被劃分為一系列的標(biāo)準(zhǔn)厚度,每累加一次厚度,就會有一個對應(yīng)頻率的激勵信號。由于脈沖激勵信號擁有豐富的頻率信號,可以用來作為厚度的掃描信號。通過對這些信號的分析,當(dāng)掃描信號對應(yīng)的厚度大于等于被測厚度時,該信號和參考值有很大區(qū)別,可以進行厚度測量。另外,為提高檢測精度,引入數(shù)據(jù)融合的方法來綜合數(shù)據(jù)信息,從而提高方法性能。
[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.
【作者單位】： 云南省計量測試技術(shù)研究院;電子科技大學(xué)自動化工程學(xué)院;
【分類號】：TB921

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本文編號：1729869