| 项目编号: | 1442623
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| 项目名称: | A Distributed Coaxial Cable Strainmeter for Earth Monitoring |
| 作者: | Tao Wei
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| 承担单位: | University of Rhode Island
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| 批准年: | 2014
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| 开始日期: | 2015-09-01
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| 结束日期: | 2017-12-31
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| 资助金额: | USD150000
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | coaxial cable
; cable
; development
; coaxial strainmeter
; coaxial waveguide
; portable prototype coaxial strainmeter
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| 英文摘要: | 1442623
Wei
This grant supports development and testing of a distributed coaxial cable strainmeter that has the potential to offer high accuracy (~ ppm) and high temporal resolution (~1 sec) measurements with unprecedented high spatial (~ 10 m) resolution over kilometers. The concept will rely on tests of coaxial cables that have been imparted with periodic electromagnetic impedance discontinuities (a Bragg grating) which allow for weak reflections of a pulsed input of an electromagnetic wave through the coaxial waveguide or implanted reflectors within the coaxial cable that will enable a coaxial strainmeter based on Fabry-Perot interferometry. A vector network analyzer then is then used to analyze transmission and reflection spectra. The PI would also explore novel signal amplification techniques to reduce losses from returned EM pulses along longer lengths of cable with multiple sensors points along the length of the cable.
The potential of the coaxial cable based strainmeter to survive large deformations (5%) and strong lateral collision/impact, may provide valuable and otherwise inaccessible information under certain extreme conditions where fiber optic based strain technologies may fail (e.g., landslides, subglacial deformation, steel structure deformation). The development will engage a graduate student to assist with: 1) development of new modelling methodology for device design and optimization, 2) explore hybrid software-hardware signal processing technology; and 3) build a portable prototype coaxial strainmeter; and 4) characterize the prototype?s performance in the laboratory and in the field.
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| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93294
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Tao Wei. A Distributed Coaxial Cable Strainmeter for Earth Monitoring. 2014-01-01.
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