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相控阵超声检测技术是一种多通道超声检测方法,与常规单通道水浸超声检测技术相比,检测方案的制定更加灵活也更加复杂。在针对复杂型面结构进行检测方案设计时,错误的检测方案将可能产生缺陷的误检、漏检等严重问题。为了针对航空航天领域广泛存在的复杂结构试件制定最优的相控阵超声检测方案,本文提出了一套针对复杂型面结构的相控阵超声检测方案设计流程,并对其中涉及的关键技术和应用进行介绍。首先,对流程框架进行总体概述,表明检测方案设计的重要性和必要性;然后针对其中涉及的5项关键理论方法的核心原理及用途进行介绍;最后搭建相控阵超声软硬件平台,实现上述关键理论方法,并用于航空航天典型结构件的检测研究。研究结果表明,所制定方案能够准确检出结构内部的预埋缺陷,满足被测对象的检测要求,并且所提出的检测方案设计流程及采用的关键理论方法有效地提高了检测方案的设计效率,对航空航天等重要领域复杂结构试件的检测应用具有一定的理论指导及应用价值。
Phased array ultrasonic testing is a multi-channel ultrasonic testing method. Compared with conventional single-channel immersion ultrasonic testing, the detection scheme is more flexible and more complex. In the design of the detection scheme for the complex profile structure, the wrong detection scheme may cause serious problems such as misdetection and missing detection. In order to develop the optimal phased array ultrasonic testing scheme for complex structural specimens widely existing in the field of aerospace, a set of design flow of phased array ultrasonic testing scheme for complex profile structure is proposed and the key technologies involved And applications are introduced. First of all, a general overview of the process framework, indicating the importance and necessity of the test program design; and then for the five key theoretical methods involved in the core principles and purposes are introduced; Finally, phased array ultrasonic hardware and software platform to achieve the above Key theoretical methods, and for the aerospace structure of a typical test research. The results show that the proposed scheme can accurately detect the embedded defects in the structure and meet the detection requirements of the tested object. The proposed design scheme of the detection scheme and the key theoretical methods effectively improve the design efficiency of the detection scheme, It has certain theoretical guidance and application value to the testing and application of complex structural specimens in aerospace and other important fields.