海洋平台结构管节点焊缝超声相控阵检测技术

为了提高海洋平台结构手工超声检测结果的重复性和缺陷定量的准确性，研究了适用于海洋平台结构的超声相控阵检测成像技术。该技术采用区域划分法将管节点焊缝分成垂直方向的若干区，由扫查器携带超声相控阵探头运动，对其分区进行电子扫查，检测结果以图像形式显示。提出海洋平台结构超声相控阵检测方案，并使用该系统在对比试件上进行试验。试验结果表明，该方法对缺陷的检测能力与传统超声检测方法相同，但检测结果的重复性和可靠性等方面，都优于传统超声检测技术。

Ultrasonic phased array inspection technology of offshore platform structure tubular joint welds

In order to improve inspection result repetition and flaw ration veracity of manual ultrasonic inspection of offshore platform structures, an ultrasonic phased array inspection imaging technology applied to offshore platform structure was proposed. A zone discrimination method is applied to divide weld into several vertical zones, and weld zones were swept by ultrasonic transducer perpendicular to weld, and inspection result was displayed in image. Inspection scheme of offshore platform structure ultrasonic phased array was also presented, and the reference block of offshore platform structure was detected by this system. Experiment results indicate that the method has the same inspecting capability as conventional ultrasonic inspection method, but the former is more excellent than the latter in repetition and reliability of inspection result, etc.