INNO faseroptische Temperatursensoren ,Temperaturüberwachungssysteme.
Faseroptischer Temperatursensor, Intelligentes Überwachungssystem, Verteilter Glasfaserhersteller in China
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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. Deshalb, 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.
Gegenwärtig, 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, verteilte Glasfaser method, etc. 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. Kontinuierliche, verteilte Messung von Temperatur und Vibration ohne tote Flecken bei der Messung
2. Gleichzeitige Erkennung und genaue Lokalisierung mehrerer Ereignisse
3. Faseroptik ist ein Sensor, der Übertragung und Abtastung kombiniert
4. 40 Kilometer ultralange Messstrecke, Umfangreiche Messinformationen
5. Schnelle Reaktionsgeschwindigkeit, Alarm im Inneren 1 Sekunde
6. Optische Signalübertragung, komplett elektrisch isoliert, Beständig gegen elektromagnetische Störungen
7. Eigensicherheit, Geeignet für den Langzeitbetrieb in brennbaren und explosiven Umgebungen
8. Stabile und zuverlässige Messung mit geringer Fehlalarmrate
9. Lange Lebensdauer der optischen Fasern, bis 30 Jahre wartungsfrei
Performance characteristics of distributed fiber optic vibration monitoring system:
Große Temperaturdistanz: 40Kilometer
Schnelle Reaktionszeit: typisch 1 Sekunde
Hohe Positioniergenauigkeit: 2-50m
Hohe Empfindlichkeit: kann Vibrationen im Umkreis von 40 m um das optische Kabel wahrnehmen
Gleichzeitige Überwachung von Vibration und Temperatur
Online-Monitoring-Funktion für LWL-Fehler
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 Sekunde
Measurement channels 1, 2, 4, 8
Vibration signal bandwidth ≤ 5KHz
Vibration measurement sensitivity ≤ 40m
Temperatur-Messbereich -100 ℃~200 ℃
