Appl Opt. 2023 Jan 10;62(2):342-347. doi: 10.1364/AO.475755.
Mountain dynamic response monitoring plays important roles in geological disaster evolution monitoring and warning. A distributed mountain seismic monitoring and steady-state analysis method is demonstrated with distributed acoustic sensing (DAS) and a natural earthquake stimulus. In the field test, the seismic detection capability is first verified by comparing the recorded seismic waveforms from DAS and existing seismic stations. The vibration signal difference between steady-state and unsteady-state mountain parts is apparent; the operational modal analysis method is utilized to extract the response difference and to monitor the disaster evolution process. The proposed method has many advantages, including being easy to deploy, all-weather online monitoring, etc. It is believed that the proposed method will broaden the DAS application scope and promote the development of geological disaster early warning such as landslides and collapses.
山体动态响应监测在地质灾害演化监测和预警中发挥着重要作用。本文利用分布式声学传感（DAS）和天然地震激励，演示了分布式山体地震监测和稳态分析方法。在现场试验中，首先通过比较 DAS 和现有地震台站记录的地震波形，验证了地震检测能力。稳态和非稳态山体部分之间的振动信号差异明显；利用运行模态分析方法提取响应差异，监测灾害演化过程。该方法具有易于部署、全天候在线监测等优点。相信该方法将拓宽 DAS 的应用范围，促进滑坡、崩塌等地质灾害预警的发展。
