港口机械产品中许多结构件之间常采用螺栓进行连接，这些服役的螺栓除了承受复杂的应力作用外，还要承受自然界某些因素的破坏。为保障这些螺栓的安全可靠性，利用相控阵A扫描、S扫描成像的特点，结合港口机械在役螺栓的实际工况，对其实施相控阵超声检测，并对检测数据图像进行分析和对比。结果表明，相控阵超声检测技术能较好地检测在役（不拆卸状态下）螺栓的质量并提高检测效率。

Many structural parts in port machinery products are connected by bolts. In service, these bolts not only bear complex stress, but also bear the damage of some natural factors. In order to ensure the safety and reliability of these bolts, the phased array A-scan and S-scan imaging features are used to analyze and compare the detection data images in combination with the actual situation of in-service bolts of port machinery, which can better detect the quality of in-service bolts (without disassembling) and improve the detection efficiency.