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，光纤传感器由于其抗电磁干扰性、尺寸小且重量轻，似乎成为用于结构健康监测的有前途的传感器。传统的光纤超声波传感器，如光纤布拉格光栅传感器和干涉式光纤传感器是基于超声波扰动引起的光学特性调制，传感部分直接粘合到被监测的材料上。在本研究中，我们重点关注光纤优越的超声引导特性。光纤粘合到受监控的样本上。通过样本传播的超声波被粘合到样本上的光纤捕获，并且沿着光纤传播的超声波由光纤布拉格光栅或压电传感器检测。首先，我们不仅通过实验而且通过分析研究了光纤在超声波传播中的基本特性。其次，我们通过设计将光纤安装到测试样本上来开发谐振光纤超声波传感器。然后，我们将光纤超声引导传感器应用于金属材料的超声无损检测。光纤超声引导传感器已被证明具有足够的超声检测灵敏度，可以检测金属材料中的缺陷。光纤超声引导传感器可以作为应用于高温等恶劣环境的候选传感器。