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透照灵敏度是评定X射线探伤机是否符合国家标准的一个重要指标之一.通常一个有经验的探伤人员采用的办法是,观看胶片上能够出现几条清晰的线即可判定机器的透照灵敏度是否合格.为了保存胶片查取具体数据,我们还是用计算的方法得到透照灵敏度数值,首先用与试块材料相同的两个线型象质计,分别放置在试块长度方向上表面的两端边缘区域,细线朝外,试块长度方向与X射线机管筒轴线平行.曝光后的胶片,经冲洗干燥处理后,放在观片灯下,用肉眼观察胶片,记录下象质计中可分辨的最细的线.每根线
Transillumination sensitivity is to assess whether the X-ray flaw detection machine is in line with national standards, one of the important indicators.Usually an experienced testing staff approach is to watch the film can appear a few clear lines to determine the machine’s transillumination sensitivity In order to save the film to find the specific data, we still calculate the method of transillumination sensitivity values, the first with the same material as the test block two linear pycnometer, respectively, placed on the surface of the test piece in the length direction of the two End edge region, the thin line outward, the length of the test block parallel to the axis of the X-ray machine tube exposed film, after washing and drying treatment, placed under the viewing lamp, with the naked eye to observe the film, record the quality of the meter The thinnest line that can be distinguished. Each line