RF Backscatter-Based Sensors for Structural Health Monitoring
RF Backscatter-Based Sensors for Structural Health Monitoring
复制标题
DOI：
10.1109/balkancom53780.2021.9593263
复制
发表时间：
2021-09
期刊：
影响因子：
--
通讯作者：
M. Stanaćević;A. Ahmad;Xiao Sha;A. Athalye;S. Das;Kelly K. Caylor;B. Glišić;P. Djurić
中科院分区：
文献类型：
--
作者：
M. Stanaćević;A. Ahmad;Xiao Sha;A. Athalye;S. Das;Kelly K. Caylor;B. Glišić;P. Djurić
人们越来越需要对各种工程结构的状况进行准确可靠的评估，并对其性能进行监测。具有嵌入式计算能力的小型化、无源、基于反向散射的射频传感器可以实现高保真度和大规模的先进结构健康监测。具体来说，这些射频供电的设备普遍嵌入和分散在结构材料中，可以在大量仪器结构中感知感兴趣的参数，执行适度的局部计算来推断结构状况，并通过反向散射调制进行通信，同时消耗接近零的功率。我们证明了反向散射通道相位传感能够量化嵌入沙子中的两个射频传感器之间的气隙大小。此外，我们还证明了相对砂土应变的敏感性。
There is a growing need for accurate and reliable assessment of conditions of a variety of engineering structures and for monitoring of their performance. Miniaturized, passive, backscatter-based RF sensors with embedded computational capabilities could enable advanced structural health monitoring at high fidelity and at large-scale. Specifically, these RF-powered devices, pervasively embedded and dispersed within the structural material, can sense parameters of interest throughout large volumes of instrumented structure, perform modest local computations to infer structural conditions, and communicate via backscatter modulation while consuming near-zero power. We demonstrate that the backscatter channel phase sensing enables quantification of a size of air gap between two RF sensors embedded in sand. Additionally, we demonstrate the sensitivity of the phase to the strain of the sand.