与其他 X 射线探伤机类似，基于 X 射线的穿透性、衰减特性以及不同物质对 X 射线吸收程度的差异。玻璃管内的 X 射线管在高电压作用下，阴极电子撞击阳极靶产生 X 射线，这些 X 射线沿特定的方向（定向）射出，穿透被检测物体。物体内部若存在缺陷，如裂纹、气孔、夹渣等，会使透过物体的 X 射线强度分布发生变化，通过 X 射线胶片或数字探测器等接收并转化为可见图像，据此判断物体内部状况。
构造
X 射线发生器：包括玻璃管 X 射线管、高压电源和绝缘介质等。玻璃管 X 射线管产生定向的 X 射线，高压电源为其提供高电压，绝缘介质保证电气绝缘。
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[ DB ] CONNECT:[ UseTime:0.001126s ] mysql:host=pc-m5epcw1px949b110u.rwlb.rds.aliyuncs.com;port=3306;dbname=yousedb;charset=utf8
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