Phased array ultrasonic detection method for titanium alloy welding seam for submersible

The invention discloses a titanium alloy welding seam phased array ultrasonic detection method for a submersible, which comprises the following steps: model selection of an area array transducer, transducer array element test, wedge block manufacturing, detection system program setting, signal-to-noise ratio test, detection sensitivity calibration, scanning and evaluation. According to the utility model, excitation, focusing, receiving and scanning of sound waves are realized by utilizing the double-sided array transducer, and a detection result is displayed by adopting a fan-shaped scanning scheme in an imaging manner, so that the signal-to-noise ratio can be effectively improved, and high-sensitivity detection of large-thickness titanium alloy welding can be realized. 本发明公开了一种潜水器用钛合金焊缝相控阵超声波检测方法，包括以下步骤：面阵换能器的选型、换能器阵元测试、楔块制作、检测系统程序设置、测试信噪比、检测灵敏度校准、扫查与评定，本专利利用双面阵换能器实现声波的激励、聚焦、接收和扫描，采用扇形扫描方案成像显示检测结果，能有效改善信噪比，能实现大厚度钛合金焊接的高灵敏度检测。