论文部分内容阅读
迄今为止,对于X射线双壁双投影透照法中的射线源平移距离,无论是X射线拍片技术的专著,还是各级无损检测刊物所发表的论文,都基本上采用的是公式计算法来对此进行确定。在用此方法进行计算时,平移距离的数值受焊缝宽度、管子外径、射线源与管子的垂直距离这三个因素的影响而变化。在施工现场进行拍照的情况下,这三个因素都是在不断的变化之中,从而每拍一张片几乎都要进行一次计算。这是十
So far, X-ray double-wall double-projection transillumination method of radiation source translation distance, either X-ray film technology monographs, or non-destructive testing publications at all levels published papers are basically used to calculate the formula To determine this. In this method of calculation, the value of the translation distance by the weld width, tube diameter, the vertical distance between the ray source and the tube of these three factors change. In the case of taking photos on the construction site, all three of these factors are constantly changing so that almost every calculation of a film is taken. This is ten