Detection Method to the First Bubble of the Surface Based on Wavelet Analysis in Magnesium Alloy Melt

Xu Sixiang; Ma Aiping; Wang Min; Huang Guofang

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Detection Method to the First Bubble of the Surface Based on Wavelet Analysis in Magnesium Alloy Melt
Vol. 30, Issue 8, Pages: 697-699(2010)
Published： 2010 ，
DOI：

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[1]许四祥,马爱萍,汪敏,黄国放.基于小波分析的镁熔液第一气泡检测方法研究[J].特种铸造及有色合金,2010,30(08):697-699+679-680.

Xu Sixiang, Ma Aiping, Wang Min, et al. Detection Method to the First Bubble of the Surface Based on Wavelet Analysis in Magnesium Alloy Melt. [J]. Special Casting & Nonferrous Alloys 30(8):697-699(2010)
[1]许四祥,马爱萍,汪敏,黄国放.基于小波分析的镁熔液第一气泡检测方法研究[J].特种铸造及有色合金,2010,30(08):697-699+679-680. DOI：

Xu Sixiang, Ma Aiping, Wang Min, et al. Detection Method to the First Bubble of the Surface Based on Wavelet Analysis in Magnesium Alloy Melt. [J]. Special Casting & Nonferrous Alloys 30(8):697-699(2010) DOI：

摘要

由于镁合金熔液自身的特性——极易氧化与燃烧

造成气泡周围背景非常复杂。利用小波分析的多尺度分解

就能够把淹没在复杂背景中的特征量变化揭示出来。根据目标、背景干扰和噪声在图像中的差异

基于对小波分解后信号的处理

并结合数学形态学的开运算

有效地检测出第一气泡。试验证实

该方法是一种有效的第一气泡检测方法。

Abstract

Background around bubbles exhibits very complex due to the characteristics of very easy oxidation and ignition of the alloy melt. The wavelet analysis in differential scale was employed to keep track of time and frequency information of character signal. With the scale zooming out

true signal was enhanced and noise was weakened. Existence of the first bubble was effectively detected based on wavelet analysis in differential scale combining with open operation of mathematic morphology according to difference of target

disturbed background and noise. The results verify that the method is feasible and effective.