Novel Coaxial Cable Bragg Grating Sensors for Large Strain Measurement in SHM

摘要1100185军范海肖密苏里科技大学本项目旨在进行研究，为一个有形的突破，在传感技术的大应变测量与高分辨率的结构健康监测（SHM）的应用，基于可行性证明，同轴电缆布拉格光栅（CCBG）的新概念。 CCBG传感器继承了光学传感器的许多优点，如高分辨率、远程操作和多路复用能力，但大大提高了SHM的鲁棒性、可靠性和生存性。 两个创新的方法，分段传输线的方法和同轴电缆的耦合模理论，将进行调查，以了解设备的物理和指导设备的设计和制造。 此外，还将研究低成本的可控变形方法和高精度的激光打孔方法，以制备高质量的CCBG器件。将使用互相关方法处理多路复用CCBG传感器的应变引起的频率偏移。 这些创新将很好地整合，从而开发和展示用于大应变测量的新型、强大的CCBG传感器平台。通过精心规划的教育和推广活动，包括课程优化、本科生和研究生参与研究、招募女性和少数民族学生、并通过实践讲习班和科学项目向初中/高中学生推广。

Abstract1100185Jun Fan & Hai XiaoMissouri University of Science & TechnologyThis project aims to carry out investigation for a tangible breakthrough in sensing technology for large strain measurement with high resolution for structural health monitoring (SHM) applications, based on the feasibility-proven, novel concept of coaxial cable Bragg grating (CCBG). The CCBG sensor inherits many advantages from its optical counterpart, such as high resolution, remote operation and multiplexing capability, but has much improved robustness, reliability and survivability for SHM. Two innovative approaches, the segmented transmission-line approach and the coupled mode theory for coaxial cable, will be investigated to understand device physics and to guide device design and fabrication. In addition, both the low-cost, controlled deformation method and the high-precision, laser hole-drilling method will be studied to fabricate high-quality CCBG devices. The strain-induced frequency shifts of multiplexed CCBG sensors will be processed using the cross-correlation method. These innovations will be well integrated leading to the development and demonstration of the new, robust CCBG sensor platform for large-strain measurements.The research will be effectively integrated into education through carefully planned educational and outreach activities, including course enhancement, involvement of undergraduate and graduate students into research, recruitment of women and minority students, and outreach to middle/high school students through hands-on workshops and science projects.