Coaxial Cable Bragg Grating Sensors for Structural Health Monitoring

In situ strain monitoring is critical to ensure the continued safe and reliable operation of various civil structures, such as dams, bridges, and buildings. In situ strain monitoring is especially important for structures that may experience large strains. In this project, a new coaxial cable Bragg grating (CCBG) is developed as a strain sensor, and the sensor's capacity for large range strain measurement is demonstrated for the first time. The sensor device is comprised of regularly spaced periodic discontinuities along a coaxial cable. The discontinuities are fabricated using a computer numerical controlled (CNC) machine to drill holes in the cable. Each discontinuity generates a weak reflection to the electromagnetic wave propagating inside the cable. Superposition of these weak reflections produces a strong reflection at discrete frequencies that can be explained by the Bragg grating theory. By monitoring the resonant frequency shift of the sensor's reflection or transmission spectra, strain measurement sensitivity of 20με and a dynamic range of 50000 με (5%) were demonstrated for axial strain measurements. The experimental results show that the CCBG sensors perform well for the large strain measurement needed in structural health monitoring (SHM).

• Record URL:
  http://www.ijprt.org.tw/reader/pdf.php?id=258
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19966814
• Supplemental Notes:
  • Abstract used by permission of publisher.
• Authors:
  • Huang, Jie
  • Wei, Tao
  • Wu, Songping
  • Lan, Xinwei
  • Fan, Jun
  • Xiao, Hai
• Publication Date: 2012-9

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 338-342
• Monograph Title: Special issue on smart and resilient transportation infrastructure
• Serial:
  • International Journal of Pavement Research and Technology
  • Volume: 5
  • Issue Number: 5
  • Publisher: Chinese Society of Pavement Engineering
  • ISSN: 1996-6814
  • EISSN: 1997-1400
  • Serial URL: http://www.ijprt.org.tw/index.php
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Coaxial cables; Sensors; Smart structures; Strain measurement; Structural health monitoring
• Uncontrolled Terms: Bragg sensors
• Subject Areas: Bridges and other structures; Data and Information Technology; Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01470475
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 23 2013 5:07PM