复杂受限结构全聚焦超声解决方案研究

The Solution Research of Complex and Restricted Structure with Total Focusing Method Ultrasonic Technology

摘要: 角焊缝是电厂中一种常见的焊接结构，其结构的多样性和复杂性以及探头可移动的空间的限制是影响超声检测顺利实施的重要因素。近年来，随着声学技术和计算机技术的发展，常规超声检测技术以及相控阵超声检测技术已普遍应用于工业检测中，全聚焦超声技术在工业检测中的应用也日益增多，但是因为技术自身的特点，在复杂受限结构检测时存在一定的局限性，无法通过有限的扫查面实现检测区域的全覆盖或者缺陷检出率无法满足要求。本文以安放式角焊缝为切入点，从探头设计、不同成像方法的比较、自定义全聚焦成像算法研究以及阵列设定等多个维度探讨全聚焦超声检测技术在复杂受限结构应用的技术要点，总结出一套适用于复杂受限结构的自定义全聚焦超声检测方案。

Abstract: Fillet weld is a common welding structure in power plants. The diversity and complexity of the structure and the limitation of the probe moving space are important factors affecting the smooth implementation of ultrasonic testing. In recent years, with the development of acoustic technology and computer technology, the conventional ultrasonic testing technology and phased array ultrasonic testing technology has been widely used in the industrial test; the total focusing method ultrasound technology application in the industrial test is also increasing; but because of the own characteristics of the technology, there are some limitations for complex and restricted structure testing, for example, the inspection area cannot be fully covered by ultrasonic with limited scanning area, and the possibility of detection can’t meet the requirements. Based on the type of placement fillet weld as the breakthrough point, from multiple dimensions such as the probe design, the comparison of different ultrasonic testing methods, custom total focusing method ultrasonic algorithm research and array setting to investigate the main technical points of total focusing method ultrasonic technologies for complex and restricted structure application, we summed up a solution of complex and restricted structure with custom total focusing method ultrasonic technology.