The core technology of Distributed optical fiber acoustic sensing analysis system（HDAS）is fiber laser self-interference technology. That is, the laser light source injects laser pulses into the fiber, and part of the backscattered light will propagate back along the fiber. The extracted backscattered light (Coherent Rayleigh Scattered Light) use optical fiber sound field reduction technology to accomplish monitoring acoustic wave frequency, phase and amplitude through real-time analysis and processing the acoustically sensitive signal.
HDAS can perform full distributed measurement, positioning, monitoring and alarming on monitoring objects. It can be used in petroleum and petrochemical, perimeter security, transportation and other fields.