X射线产生：通过高压发生器将电能转化为高压，加速电子束，使其撞击金属靶材，电子的动能转化为 X射线的能量，从而产生 X 射线。
穿透与成像：X射线具有穿透性，能穿透被检测物体。由于物体内部的结构、密度等不同，对 X射线的吸收和散射程度有差异，使得透过物体的 X 射线强度分布不同。探测器接收透过物体的 X射线，将其转化为电信号或数字信号，再经图像处理系统生成物体内部的图像，据此分析判断物体内部是否存在缺陷，如裂纹、气孔、夹杂等。
结构组成
X射线发生器：产生 X射线的核心部件，包括高压电源、X 射线管等，能提供稳定的高压以加速电子产生 X 射线。
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