long-range pipeline monitoring by distributed fiber optic sensing

Fiber optic temperatura sensor, Intelligent monitoring system, Distributed fiber optic manufacturer in China

There are some minor defects in the production process of natural gas transmission pipelines. Under long-term transmission loads and the high temperature and corrosive environment of the transmission medium, pipeline corrosion will accelerate and worsen, ultimately leading to pipeline damage and leakage accidents, causing huge direct economic losses, and triggering a series of secondary disasters, such as fires and environmental pollution, posing a threat to people’s life safety. Busa, safety issues during natural gas pipeline transportation, especially online real-time leak detection of natural gas pipelines, have always been a top priority that needs to be considered in safety production.

At present, there are many leakage monitoring methods for gas pipelines, which can be divided into mass/volume balance method, applied statistical method, negative pressure wave method, transient model method, distributed fiber optic method, ug uban pa. based on the different gas flow parameters monitored inside the pipeline. The gas pipeline leakage detection method based on distributed fiber optic sensing has been widely studied and applied due to its advantages of good sensitivity, high positioning accuracy, short detection time, strong adaptability, and long system life. When a gas pipeline ruptures at a certain point and leaks, it will disrupt the normal pressure balance in the pipeline, release the elastic energy of the fluid in the pipeline system, and cause instantaneous oscillation to produce sound waves. The leakage sound wave is generated by the excited energy of gas leakage, and is a continuously emitted signal with a frequency of several hundred kHz, mainly propagating along the pipe wall. By using optical fibers installed along the pipeline, this acoustic signal can be monitored and collected. By extracting and identifying the characteristics of the acoustic signal, it can be determined whether there is a leak in the pipeline.

Advantages of distributed fiber optic natural gas transmission pipeline security vibration monitoring technology:

1. Padayon nga giapod-apod nga pagsukod sa temperatura ug pagkurog nga wala’y pagsukod nga mga blind spot

2. Dungan nga pagkakita ug tukma nga lokalisasyon sa daghang mga panghitabo

3. Ang fiber optic usa ka sensor nga naghiusa sa transmission ug sensing

4. 40 kilometro nga ultra taas nga gilay-on sa pagsukod, dato nga impormasyon sa pagsukod

5. Paspas nga tubag tulin, alarma sa sulod 1 ikaduha

6. Optical signal transmission, bug-os nga electrically insulated, resistant sa electromagnetic interference

7. Intrinsic nga kaluwasan, angay alang sa long-term nga operasyon sa masunog ug mobuto nga mga palibot

8. Lig-on ug kasaligan nga pagsukod nga adunay ubos nga sayup nga rate sa alarma

9. Taas nga serbisyo sa kinabuhi sa optical fibers, hangtod sa 30 tuig nga walay maintenance

Performance characteristics of distributed fiber optic vibration monitoring system:

Taas nga gilay-on sa temperatura: 40km

Paspas nga oras sa pagtubag: tipikal 1 ikaduha

Taas nga positioning accuracy: 2-50m

Taas nga pagkasensitibo: makasabot sa mga vibrations sulod sa 40m sa palibot sa optical cable

Dungan nga pagmonitor sa vibration ug temperatura

Online monitoring function alang sa fiber optic mga sayop

Friendly user software that provides a visual interface

 

Performance indicators of distributed fiber optic vibration monitoring system:

Technical performance

Fiber type single-mode fiber

Measurement distance of 40km

Positioning accuracy of 1m~50m

Sampling interval of 0.5m

Measurement time typical 1 ikaduha

Measurement channels 1, 2, 4, 8

Vibration signal bandwidth ≤ 5KHz

Vibration measurement sensitivity ≤ 40m

Temperature measurement range -100 ℃~200 ℃