Introduction

Distributed Acoustic Sensing (DAS) solution turns standard optical fibre into a continuous acoustic sensor, providing real-time detection of vibrations and disturbances. It is ideal for protecting critical infrastructure like pipelines, railways, borders, airports, and industrial facilities.

Technology Overview

DAS works on the Rayleigh backscattering principle. Laser pulses are sent through optical fibres, and any external vibration alters the backscatter pattern. Each meter of fibre functions like an independent acoustic sensor, enabling long-range, high-accuracy monitoring.

Working Principle

• Laser pulses are transmitted along the optical fibre.
• Vibrations from external activities (intrusion, digging, tampering) modify the backscatter.
• The system measures the time delay of the backscatter to calculate the precise location and type of disturbance.

Applications