overview

The distributed fiber optic temperature measurement system is the most advanced linear fire detector in the world, which can achieve distributed real-time measurement of temperature in a large area of space. It has the advantages of long measurement distance, no measurement blind spots, real-time monitoring, and precise positioning. It is widely used in transportation tunnels, subways, power, petrochemicals, water conservancy and other fields.

The distributed fiber optic temperature measurement system simultaneously achieves temperature measurement and spatial positioning functions, with temperature measurement utilizing the fiber optic spontaneous Raman scattering effect and spatial positioning utilizing optical time domain reflectometry (OTDR) technology. The high-speed narrow pulse semiconductor laser pulse is coupled into the sensing fiber, and through filtering, detection, and high-speed data acquisition and analysis of the weak backscattering signal of the fiber, temperature sensitive anti Stokes signals and temperature insensitive Stokes signals are obtained, thereby obtaining accurate temperature information distributed along the fiber in real time; By combining advanced fire intelligent alarm judgment algorithms, real-time online monitoring of the entire sensing fiber optic process can be achieved.

　　Technical Parameter