Which is a good distributed fiber optic DTS temperature measurement DVS vibration monitoring system

Zuntz optikoko tenperatura sentsorea, Monitorizazio sistema adimenduna, Txinan banatutako zuntz optikoko fabrikatzailea

Pipeline transmission has been widely applied and promoted in today’s society, with its ability to transport oil and gas resources being the most significant. But with the rapid development of the economy, a series of disasters such as fires, explosions, and pollution caused by leaks in pipelines are becoming increasingly serious. These disasters are mainly caused by unreasonable drilling and oil theft, pipeline aging, and severe natural disasters.

Distributed fiber optic monitoring method is a software based pipeline leak detection method. It is divided into two different detection methods: temperature and vibration. The use of temperature detection method is mainly due to the use of distributed optical fiber temperature sensors to enhance the detection and measurement of temperature changes around the pipeline in case of leakage in the heated oil pipeline, in order to locate the specific location of the pipeline leakage. Vibration detection mainly relies on optical fibers to extract leakage signals along the pipeline, actively analyze and process the signals emitted, and report the specific situation of leakage in real time.

DTS (Fiber Temperature Sensing System) is mainly based on the principle of Optical Time Domain Reflectometry (OTDR), using a high-power laser transmitter to send laser pulses to the detection optical cable of the transmission connection, while collecting and analyzing Raman scattering light in the backscattered light, in order to specifically solve the distribution requirements of temperature detection. It mainly accurately locates the leakage point based on the temperature changes along the pipeline, and solves the problems of oil and gas mixed transportation and gas pipeline leakage monitoring.

The working principle of DVS (Fiber Optic Vibration Sensing System) for measuring vibration signals is based on the principle of optical time domain reflection. When any part of the fiber is disturbed, its refractive index will also change with the influence of the elastic optical effect, thereby changing the phase of the light wave at the disturbed part. Furthermore, due to the interference, the change in the phase of the light wave will also affect the intensity of the Rayleigh scattered light. By analyzing and processing the backward Rayleigh scattered light signal carrying disturbance information, accurate positioning of disturbances and intrusions can be achieved.

The pipeline laying along the route is often damaged by third parties. Currently, the most reliable solution for building a distributed sensor optical cable vibration monitoring and warning system is to use optical cables. The use of warning system devices can record and monitor soil vibration situations that occur during real-time transmission of optical cables. The intelligent learning function can actively judge the danger signals sent out and issue timely warnings, notifying monitoring personnel to take appropriate measures in the first time to prevent the occurrence of danger.

Distributed fiber optic sensing technology, as one of the most promising technologies in fiber optic sensing, has the advantage of being able to achieve large-scale and ultra long distance detection, Horrez gain, computer technology has solved the problem of long measurement time and inability to detect in real-time in distributed fiber optic sensing, greatly improving the performance of distributed fiber optic sensing. It can be applied to situations that require real-time monitoring and a large number of sensors.

Advantages of Distributed Fiber Optic Monitoring System

Long distance detection: multi-channel long-distance detection with long detection range;

Multi point simultaneous positioning: can restore the invasion trajectory;

Positioning accuracy ± 1 metroa: cooperate with monitoring to achieve fixed-point capture;

One click troubleshooting of fiber breakage points: The system software automatically identifies the length of the sensing optical cable with one click, making it easy to query fiber breakage points and easy to install and maintain;

Can set whitelist of points: Within the range of fiber optic cable installation, some areas can be set as whitelist points to flexibly set non detection areas.