| Gabor变换用于核压力容器裂纹楞边超声检测 |
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| 引用本文： | 刘国华,吴更石,贾斗南,上官金明,王振江,周汇东.Gabor变换用于核压力容器裂纹楞边超声检测[J].核动力工程,1998(6). |
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| 作者姓名： | 刘国华 吴更石 贾斗南 上官金明 王振江 周汇东 |
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| 作者单位： | 西安交通大学，核动力运行研究所 |
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| 摘 要： | 核压力容器不锈钢堆焊层的材料噪声降低了在役检测中超声信号的信噪比。本文应用Ｇａｂｏｒ变换时频分析技术，根据裂纹楞边的频偏特性，提取了裂纹楞边超声回波。该技术可用于定量地检测核压力容器的裂纹状况。
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| 关 键 词： | Gabor变换，时－频分析，裂纹楞边回波，超声检测 |
Application of Gabor Transform for Detecting Crack Edge Reproduced Wave from Reactor Pressure Vessel |
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| Liu Guohua,Wu Gengshi,Jia Dounan.Application of Gabor Transform for Detecting Crack Edge Reproduced Wave from Reactor Pressure Vessel[J].Nuclear Power Engineering,1998(6). |
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| Authors: | Liu Guohua Wu Gengshi Jia Dounan |
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| Abstract: | In in service inspection of reactor pressure vessel,signal tonoiseratio of ultrasonic signals are decreased by material noise originating from welding cladding of stainless steel of reactor pressure vessel.Crack edge reproduced waves (ultrasonic signals)have been detected by using Gabor transform of time frequency analysis,and frequency shift of crack edge.These cracks can be inspected quantitatively by this technology. |
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| Keywords: | Gabor transform Time frequency analysis Crack edge reproduced wave Ultrasonic inspection |
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