摘要
变截面铸钢件是高速列车常见零部件,应用X射线照相法检测难度很大。采用450 kV X射线数字平板成像检测系统(DR),采用光栏限束准直器、叠加曝光或连续透射以降低图像噪声;屏蔽散射线以提高信噪比;利用软件调节以增强图像细节,达到充分利用数字成像动态范围大、宽容度良好的特性,成功地检测了高速列车变截面铸钢件中的各种缺陷。
The variable cross-section cast steel parts are common parts in high-speed trains, and it is very difficult to apply X-ray radiographic inspection to it. But fortunately, the X-ray DR system could acquire richer original image; the continuous exposure Log-calculation or the images averaging could decrease the noise; the scattered radiation shield could improve the signal to noise ratio; the logarithmic demodulation could enhance the image details; and the digital radiography could get wide dynamic range, and have excellent Latitude. By using all these methods and technologies, we successfully tested various defects of the cross-section steel castings in the highspeed train.
出处
《无损检测》
2011年第12期66-68,99,共4页
Nondestructive Testing
关键词
数字射线成像检测
变截面
铸钢
动态范围
连续透射
Digital radiography testing
Variable cross-section
Cast steel
Dynamic range
Continuous exposure
