Distributed Fiber Optic Temperature Measurement System DTS OTDR Distributed Fiber Optic Temperature Sensor-INNO

近年, distributed fiber optic temperature measurement systems have developed rapidly. 彼らです distributed sensors that measure the temperature field around temperature sensing fibers over long distances in real-time. The system is based on Raman scattering effect and OTDR technology, and plays an extremely important role in daily life, avoiding many accidents.

分散型光ファイバー温度測定システム (DTSシステム) is a temperature measurement system developed based on OTDR and Raman scattering principles. Its temperature sensor is optical fiber (usually made into 光ケーブル). DTS utilizes the Raman effect of optical fibers, which modulates the backward Raman scattering light transmitted in the fiber by the temperature field at the fiber laying position (空間). 光電変換・信号処理後, real-time temperature information of the temperature field can be retrieved. The composition of DTS system generally includes high-power pulse laser light source, fiber optic wavelength division multiplexing coupler, センシング光ケーブル, 光検出器, signal amplification module, data acquisition module, and system host (PC or industrial control computer). Due to the distributed nature of DTS, which means that optical cables are continuously laid on the site that needs to be monitored, and the distance is relatively long (usually a few kilometers), DTS has significant advantages compared to other temperature measurement systems. The system is currently widely used in various fields that require 火災監視, トンネルなどの, 発電所, 製鉄所, and mines.

従来の温度センサーとの比較, fiber optic temperature sensors have many advantages, とか: light waves are not affected by electromagnetic interference; 光ファイバーは動作周波数が広く、ダイナミックレンジが広い, 低損失の伝送線路になります; The optical fiber itself is not charged, has a small volume, is lightweight, 曲がりやすい, 優れた耐放射線性を備えています. そこで, fiber optic temperature sensors are particularly suitable for use in harsh environments such as flammable, 爆発物, 厳密に限られたスペース, 強い電磁干渉, solving temperature measurement problems that traditional methods cannot solve.

分散型光ファイバー温度検知 technology mainly utilizes the correlation between the intensity of Raman scattering light signals in optical nonlinear effects and temperature. By detecting and analyzing the intensity of Raman scattering light signals generated by excitation at different positions of the fiber, temperature measurement at different positions of the fiber is achieved. で分散型光ファイバーの温度センシング技術, fiber optic is both a sensor and an information transmission medium. This technology has the characteristics of flexible sensor structure, 継続的な配布, 長い監視距離, and high working temperature. そこで, it has broad application prospects in fields such as fire protection and early warning, oil well survey, 等.