Development of ultrasound guided optical fiber sensors

超声引导光纤传感器的研制

基本信息

批准号：
18560685
负责人：
TSUDA Hiroshi
金额：
$ 2.45万
依托单位：
National Institute of Advanced Industrial Science and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560685/
关键词：
ultrasound non-destructive testing optical fibers ultrasonic guide

项目摘要

Recently, fiber-optic sensors have seemed promising sensors for structural health monitoring because of their electromagnetic interference immunity, small size as well as lightweight. Conventional fiber-optic ultrasonic sensors, such as fiber Bragg grating sensor and interferometric fiber optic sensors are based on the optical characteristic modulation induced by ultrasonic perturbation and the sensing part is directly bonded to the materials to be monitored.In the present study, we focused on the superior ultrasonic guide characteristics of optical fibers. Optical fiber was bonded to the monitored specimen. Ultrasound propagated through the specimen was caught by the optical fibers bonded to the specimen and ultrasound propagated along the optical fiber was detected with fiber Bragg grating or piezoelectric sensor. First, we have studied basic characteristics of optical fibers on ultrasonic propagation not only experimentally but also analytically. Second, we have developed resonant fiber-optic ultrasonic sensors by devising the installation of optical fiber to the tested specimen. Then, we have applied fiber-optic ultrasonic guide sensors to ultrasonic non-destructive testing of metallic materials. Fiber-optic ultrasonic guide sensors have been demonstrated enough sensitivity of ultrasonic detection to detect defects in metallic materials.Fiber-optic ultrasonic guide sensors can be candidate sensors which are applied to harsh environment such as elevated temperature.

最近，由于电磁干扰免疫力，尺寸较小和轻量级，光纤传感器似乎是结构性健康监测的有前途的传感器。常规的纤维 - 机器超声传感器，例如纤维bragg栅格传感器和干涉纤维光纤传感器是基于由超声扰动引起的光学特征调制，并将传感片段直接粘合到本研究中。将光纤粘合到受监视的样品上。通过标本传播的超声传播被粘合到样品的光纤捕获，并用光纤沿光纤传播的超声纤维用纤维bragg光光或压电传感器检测到。首先，我们研究了光纤在超声传播的基本特征，不仅在实验上而且在分析上也是如此。其次，我们通过将光纤安装到经测试的样品上安装来开发出谐振纤维的超声传感器。然后，我们将光纤超声指导传感器应用于金属材料的超声非破坏性测试。光纤超声指导传感器已经证明了超声检测的足够灵敏度，以检测金属材料中的缺陷。纤维 - 启用超声指导传感器可以是候选传感器，可用于候选传感器，这些传感器适用于诸如升高温度之类的恶劣环境。