Vibración de temperatura de fuga de tubería de detección de fibra óptica distribuida DTS, DVS, EL, ventajas-INNO

Introducción a Distributed Fiber Optic Acoustic Sensing System

A measurement system developed based on distributed fiber optic sensing technology. It is a comprehensive new distributed fiber optic sensing technology system that integrates multiple disciplines such as optics, electrónica, mechanics, y procesamiento de señales digitales, based on the Rayleigh scattering effect generated by optical signals during fiber optic propagation and the principle of optical time domain reflectometry (OTDR) tecnología. In this system, optical fibers are both devices for transmitting optical signals and sensing external information. Por lo tanto, they can continuously and quickly measure external acoustic and vibration information along the fiber optic cable.

Advantages and Applications of Distributed Fiber Optic Sensors

It has many advantages such as low loss, tamaño pequeño, peso ligero, alta sensibilidad, fuerte resistencia a la corrosión, antiinterferencia electromagnética, sin necesidad de fuente de alimentación, y bajo costo, que compensan las deficiencias de los sensores eléctricos tradicionales en el rango de monitoreo y la confiabilidad del sistema, y han logrado un rápido desarrollo en sólo unas pocas décadas. La gente ha logrado con éxito medir los cambios de temperatura., concentración, presión, vibración, desplazamiento, e índice de refracción utilizando varios sensores de fibra óptica. Hasta ahora, Varios tipos de sensores de fibra óptica se han utilizado ampliamente en campos como la seguridad perimetral., aeroespacial, monitoreo de tuberías, ingeniería energética, y la investigación biomédica. entre ellos, El valor más práctico es sin duda el sistema de detección distribuida de fibra óptica..

Sensor de temperatura distribuido de fibra óptica para subestaciones

The fiber optic temperature measurement system used for substation temperature monitoring can accurately and timely locate temperature anomalies on a single fiber optic cable through distributed fiber optic temperature testing based on Raman scattering temperature measurement technology; Al mismo tiempo, the system is equipped with multi-level temperature alarm values and temperature rise rate alarms, displaying temperature distribution curves in real time, and providing early warning before a fire occurs. This solves the problem that existing temperature measurement systems can only passively set a temperature threshold, which is prone to misjudgment and cannot accurately locate the location of the accident point. Distributed fiber temperature testing based on Raman scattering temperature measurement technology can accurately and timely locate temperature anomalies on a single fiber; Al mismo tiempo, the system is equipped with multi-level constant temperature alarm values and temperature rise rate alarms, displaying temperature distribution curves in real time, and providing early warning before a fire occurs, greatly reducing the probability of substation fires.

Oil pipeline leakage temperature vibration host

Actualmente, oil and gas pipelines are an important component of petroleum and natural gas engineering. Due to corrosion, weld defects, external vibrations, and even theft and damage, pipeline leaks, damage to anti-corrosion coatings, and leaks and corrosion at pipeline connections such as flanges, threaded buckles, and packing boxes have become increasingly severe. Pipeline leakage not only causes obstruction of transportation, but also pollutes the environment and even triggers accidents such as explosions and fires, requiring a significant amount of manpower and resources for monitoring, mantenimiento, y gestión. So early prevention, advertencia oportuna, and location of pipeline leaks have very important practical significance.

Al mismo tiempo, oil and gas need to be heated during transportation to promote flow. The heating device heats the oil to a certain temperature and then transports it in pipelines. Sin embargo, excessive heating can cause resource waste and increase the cost of oil and gas transportation. How to set heating reasonably is of great significance for energy consumption control in oil and gas engineering. The temperature of oil in pipelines will decrease, forming a temperature gradient that decreases with transportation distance. Los valores de monitoreo distribuidos y en tiempo real de esta temperatura pueden servir como una base importante para el control de retroalimentación de calefacción., que juega un papel importante en el control razonable de la temperatura y la reducción del consumo de energía del transporte.

El sistema integral de monitoreo de oleoductos y gasoductos está equipado con cables ópticos en el interior de los oleoductos., que están conectados al host de monitoreo de fibra óptica. Los cables ópticos detectan las señales de vibración de los oleoductos y gasoductos en tiempo real y las transmiten al host de monitoreo de fibra óptica para detectar el estado de fuga de los oleoductos y gasoductos en diferentes posiciones.. entre ellos, Las señales de vibración pueden reflejar principalmente vibraciones externas e incluso robos y daños..

Monitoreo distribuido por fibra óptica de la temperatura de las tuberías de agua.

Once invaded by malicious excavation, perforación, or geological disasters causing pipeline rupture and damage, it will be destroyed and even lead to environmental pollution and economic losses. In order to maintain safety along the pipeline and prevent human or environmental damage, it is necessary to conduct real-time online monitoring of the working status of water pipes and provide timely and accurate advance alarms for threatening intrusion events. Por lo tanto, pipeline safety monitoring technology plays an important role in maintaining pipeline transportation and has social and economic significance.

Distributed fiber optic temperature measurement system is a technology used for real-time measurement of temperature spatial distribution, which can be widely applied to temperature detection and fire warning in coal mines, túneles, grandes edificios, transmission cables, bandejas de cables, and other areas. The distributed fiber optic temperature measurement system mainly uses the principle of spontaneous Raman scattering inside the fiber optic to measure temperature, and uses the principle of optical time domain reflection to locate and realize the temperature sensing system for measuring the temperature field.

DAS distributed fiber optic acoustic vibration monitoring

The distributed fiber optic sensing system based on the principle of phase sensitive photosensitive time-domain reflection (F – OTDR) has the advantages of simple structure, long detection distance, ability to locate multiple disturbances simultaneously, resolución alta, and accurate positioning accuracy. Se puede aplicar en el monitoreo de fugas de tuberías de suministro de agua para detectar y localizar la ubicación de la fuga en tiempo real sin causar ningún daño ni afectar el funcionamiento normal de la tubería.. Detección acústica distribuida (EL) se basa en el Φ – tecnología OTDR, que detecta la señal de fase de la luz retrodispersada en la fibra sensora para lograr la detección de señales de sonido o vibración distribuidas. No solo proporciona información sobre la intensidad de eventos de sonido o vibración utilizando fase y amplitud., pero también utiliza valores de medición cuantitativos lineales para obtener información de frecuencia y fase de tiempo del sonido..