摘要
采用数字射线成像检测技术对压力管道进行定期腐蚀检验和腐蚀深度测量。检测试验过程中使用了不同工艺参数的透照阶梯试块,考虑到采集到图像的灰度值与透照厚度的关系近似于指数曲线,采用数字射线成像检测测量管道腐蚀位置附近的已知厚度点的灰度,把腐蚀位置的灰度代入指数函数后通过两点拟合指数曲线,计算出腐蚀深度,并进行试验验证。结果表明,计算结果与实测结果误差很小,该结果可为相关研究及工程应用提供参考。
Using digital radiography inspection technology to conduct regular corrosion inspection and corrosion depth measurement on pressure pipelines. Different process parameters are used in the process of the inspection test. Taking into account that the relationship between the gray value of the collected image and the thickness of the transillumination is similar to an exponential curve, digital radiography is used to detect the gray level of the point of the known thickness near the corrosion position of the measurement pipeline. Through two-point fitting exponential curve, after substituting the gray value of the corrosion position into the exponential function, the corrosion depth is calculated, and the test is verified. The result shows that the error between the calculated value and the measured value is very small, and the result provides reference for research and engineering applications.
作者
赵俊生
马朝阳
张心荣
ZHAO Junsheng;MA Chaoyang;ZHANG Xinrong(Gansu Special Equipment Inspection and Testing Research Institute,Lanzhou 730050,China)
出处
《无损检测》
CAS
2021年第6期45-49,共5页
Nondestructive Testing
关键词
腐蚀深度
灰度
透照厚度
线性关系
缺陷高度
corrosion depth
gray
transillumination thickness
linear relationship
defect height
