分布式光纤声波传感 Distributed Acoustic Sensing (DAS)

产品介绍 Product Introduction

分布式光纤声波传感系统（DAS）是一种利用相干瑞利散射原理的高灵敏度振动和声波探测技术。通过向光纤中注入相干脉冲光，接收后向散射信号并分析相位变化，DAS 可以实时感知光纤沿线任意位置的振动和声波事件。系统可探测微应变级别（µε）的振动，覆盖距离可达 100km 以上，单根光纤即可实现连续的空间传感，适用于长距离周界安防、管道泄漏检测、结构健康监测、井下地震监测等多种场景。 Distributed Acoustic Sensing (DAS) is a high-sensitivity vibration and acoustic detection technology based on coherent Rayleigh scattering principles. By injecting coherent pulse light into a fiber optic cable and analyzing phase changes in the backscattered signal, DAS can real-time sense vibration and acoustic events at any location along the fiber. The system can detect micro-strain level (µε) vibrations with coverage distances exceeding 100km. A single fiber can achieve continuous spatial sensing, making it ideal for long-range perimeter security, pipeline leak detection, structural health monitoring, downhole seismic monitoring, and many other applications.

产品特点 Product Features

• 超高灵敏度 - 可探测微应变级别（µε）的振动信号Ultra-high sensitivity - detects micro-strain level (µε) vibration signals
• 超长距离监测 - 单通道覆盖距离可达 50km-100km+Ultra-long distance monitoring - single channel coverage up to 50km-100km+
• 高空间分辨率 - 传感分辨率可达 1m-10m，精准定位振动源High spatial resolution - sensing resolution up to 1m-10m, precise vibration source localization
• 本质安全 - 无源光纤传感，无电磁干扰，适合危险环境Intrinsically safe - passive fiber optic sensing, EMI-free, suitable for hazardous environments
• 宽频响应 - 可探测 0.1Hz 至 100kHz 范围内的声波和振动信号Wide frequency response - detects acoustic and vibration signals from 0.1Hz to 100kHz
• 实时报警与定位 - 毫秒级事件响应，支持多级报警阈值和 GIS 集成Real-time alarm and localization - millisecond event response, supporting multi-level alarm thresholds and GIS integration

适用场景 Applicable Scenarios

长输管道泄漏检测与定位、围界安防与入侵检测、公路/铁路护栏防护、地下管廊安全监测、井下地震与微地震监测、结构健康监测（桥梁、大坝、隧道）、油气田井下生产监测、海底电缆防护与锚害监测、光纤通信线路安全 Long-distance pipeline leak detection and localization, perimeter security and intrusion detection, highway/railway fence protection, underground utility tunnel safety monitoring, downhole seismic and microseismic monitoring, structural health monitoring (bridges, dams, tunnels), oil and gas field downhole production monitoring, submarine cable protection and anchor damage monitoring, fiber optic communication line security

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