钢轨踏面裂纹的表面波B扫描成像检测

详细信息

Surface Wave B Scan Imaging Detection of Rail Tread Cracks

摘要: 用超声表面波来检测钢轨踏面裂纹，设计和加工了具有不同深度的裂纹试样。采用频率为0.5 MHz的表面波探头对裂纹试样进行B扫描成像检测。为克服钢轨中传播的多模式表面波导致检测图像分辨率低的缺点，采用对A扫描信号移位叠加的方法对图像进行了处理。此方法不仅能对表面裂纹进行较精确的定位，也能定性区分表面裂纹的深度。
- 表面波 /
- 钢轨踏面裂纹 /
- B扫描 /
- 移位叠加
Abstract: This paper aims to use ultrasonic surface waves to detect the rail tread crack. A group of specimens with different depth were designed and produced. The test was carried out by the imaging method of B scan along the vertical side of rail by 0.5 MHz surface wave probe. In order to decrease the disadvantage of low resolution that caused by multimodes, this paper used shift superimposed technique for different place of A scan wave by data processing software. This method could achieve accurate position of the cracks and also could reflect the depth of the crack.
- Surface wave /
- Rail tread cracks /
- Bscan /
- Shift superimposed technique

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