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

En los últimos años, distributed fiber optic temperature measurement systems have developed rapidly. Ellos son sensores distribuidos 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.

Sistema distribuido de medición de temperatura de fibra óptica (sistema EDE) is a temperature measurement system developed based on OTDR and Raman scattering principles. Its temperature sensor is optical fiber (usually made into optical cable). 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 (espacio). Después de la conversión fotoeléctrica y el procesamiento de señales., 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, cable óptico de detección, fotodetector, 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 Monitoreo de incendios, como túneles, Centrales eléctricas, acerías, and mines.

Compared with traditional temperature sensors, fiber optic temperature sensors have many advantages, como: light waves are not affected by electromagnetic interference; La fibra óptica tiene una amplia frecuencia de operación y un gran rango dinámico., convirtiéndola en una línea de transmisión de bajas pérdidas; The optical fiber itself is not charged, has a small volume, is lightweight, Fácil de doblar, y tiene buena resistencia a la radiación. Por lo tanto, fiber optic temperature sensors are particularly suitable for use in harsh environments such as flammable, explosivo, espacio estrictamente limitado, y fuerte interferencia electromagnética, solving temperature measurement problems that traditional methods cannot solve.

Detección de temperatura de fibra óptica distribuida 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. En temperatura distribuida de fibra óptica tecnología de detección, fiber optic is both a sensor and an information transmission medium. This technology has the characteristics of flexible sensor structure, distribución continua, larga distancia de monitoreo, and high working temperature. Por lo tanto, it has broad application prospects in fields such as fire protection and early warning, oil well survey, etc.