Cracks measurement using fiber-phased array laser ultrasound generation

作者：Cuixiang Pei, Kazuyuki Demachi, Tetsuo Fukuchi, Kazuyoshi Koyama, Mitsuru Uesaka · 发表于：Journal of Applied Physics · 年份：2013 · DOI：10.1063/1.4802685 · 被引用次数：30 · 研究领域：Ultrasonics and Acoustic Wave Propagation、Thermography and Photoacoustic Techniques、Advanced Fiber Optic Sensors

A phased array laser ultrasound generation system by using fiber optic delivery and a custom-designed focusing objective lens has been developed for crack inspection. The enhancement of crack tip diffraction by using phased array laser ultrasound is simulated with finite element method and validated by experiment. A non-contact and non-destructive measurement of inner-surface cracks by time-of-flight diffraction method using fiber-phased array laser ultrasound generation and electromagnetic acoustic transducer detection has been studied.