A method for visualizing urban road events using distributed acoustic sensing  

作　　者：Shitong Hou Yaojie Li Gang Wu Dong Wu Yixuan Dong Shuya Zhang Jing Wu 

机构地区：[1]School of Civil Engineering,Southeast University,Nanjing 210096,People’s Republic of China [2]National and Local Joint Engineering Research Center for Intelligent Construction and Maintenance,Nanjing 210096,People’s Republic of China [3]Southeast University Urban Lifeline Security Research Center,Nanjing 210096,People’s Republic of China

出　　处：《Urban Lifeline》2024年第1期73-91,共19页城市生命线(英文)

基　　金：supported by the Jiangsu Provincial Key R&D Program(Social Development)(BE2022820);the National Natural Science Foundation of China(52208306);the Natural Science Foundation of Jiangsu Province(BK20220849).

摘　　要：This study presents the construction of an urban underground sensing system using distributed acoustic sensing(DAS)technology,which utilizes the existing optical fiber infrastructure around urban roads for communication.To address the challenges posed by the complexity and variability of DAS data in infrastructure monitoring environments such as urban roads,as well as the difficulty and poor effectiveness of raw data visualization,a novel method for visualizing DAS data is proposed.This method involves preprocessing the data through wavelet threshold denoising,combining it with the root-mean-square(RMS)energy index to generate a visualization,and applying the dynamic threshold method to remove and suppress abnormal data indicators.Finally,this paper tested the visualization performance to assess the effectiveness of the proposed method in improving urban road safety management.The study focused on three typical urban road safety risk events:vehicle driving,construction,and road subsurface cavity incidents.The results demonstrate the efficacy of the data visualization method,showing improved visualization of vehicle trajectory directions and numbers,construction segment behaviors,and approximate road subsurface cavity locations in the time domain compared to the original data.

关 键 词：Distributed acoustic sensing(DAS) Urban underground sensing data Data visualization Urban road safety risk events 

分 类 号：TN9[电子电信—信息与通信工程]