CAJ | 학술논문

针对复杂电磁环境下传统超声波探头易受电磁波干扰的缺陷，构建基于布拉格光栅传感器的2种超声传感系统。介绍布拉格光栅的原理，利用宽带光源和可调激光系统进行超声探测，构建2种布拉格光栅传感系统，采用布拉格光栅超声传感系统进行伤情探伤，并进行实验验证对比。结果表明：具备可调激光光源布拉格光栅传感器的超声探测系统对超声波具有相当高的灵敏度，在复杂电磁环境下对结构复合材料的超声探伤中可以作为传统的压电传感器的替代品。
침대복잡전자배경하전통초성파탐두역수전자파간우적결함，구건기우포랍격광책전감기적2충초성전감계통。개소포랍격광책적원리，이용관대광원화가조격광계통진행초성탐측，구건2충포랍격광책전감계통，채용포랍격광책초성전감계통진행상정탐상，병진행실험험증대비。결과표명：구비가조격광광원포랍격광책전감기적초성탐측계통대초성파구유상당고적령민도，재복잡전자배경하대결구복합재료적초성탐상중가이작위전통적압전전감기적체대품。
Focusing on the defect of traditional ultrasonic technical, which is easily being influenced under electromagnetic environment, two types of fiber Bragg grating (FBG) ultrasonic sensing system were constructed using different light source. Introducing the principle of FBG, using the two types of FBG ultrasonic sensing system for ultrasonic testing, and some experiments has been made for research. Results shows, the FBG ultrasonic sensing system including a tunable laser possessed high sensitivity to ultrasonic wave and proved to be an alternative to conventional piezoelectric sensors in ultrasonic inspection of structural composite materials.