The temperature-sensing fiber of the distributed optical fiber temperature measurement system is intrinsically safe, resistant to high voltage, strong electromagnetic field, strong interference, explosion-proof and fire-proof, and can measure the temperature in contact with the rectifier cabinet. At the same time, because the measurement method is distributed, it can monitor the overheating problem in any position on the rectifier cabinet in real time, and has the function of temperature overheating warning and temperature overlimit alarm. Once the threshold temperature reaches or exceeds the temperature threshold, the system will automatically start the acoustic, optical, and electrical alarm system to notify the inspection personnel to repair and prevent problems. It can also be used to measure the distribution temperature of rolling production line. Blast furnace safety operation monitoring; Gas storage tank and gas pipeline monitoring; Overheat monitoring of plant electrical equipment; Safe operation monitoring of electrolytic cell.

The system uses the principle of optical fiber Raman scattering (OTDR) and optical time domain scattering to collect the spatial temperature distribution information, and can accurately locate the temperature information point according to the physical relationship between the transmission speed and time of the optical wave in the fiber.

System block diagram