Sensores de temperatura de fibra óptica INNO ,sistemas de monitoramento de temperatura.
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. Portanto, 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.
Atualmente, 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, fibra óptica distribuída método, etc.. based on the different gas flow parameters monitored inside the pipeline. The gas pipeline leakage detection method based on fibra óptica distribuída sensing has been widely studied and applied due to its advantages of good sensitivity, alta precisão de posicionamento, 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.
Vantagens de fibra óptica distribuída natural gas transmission pipeline security vibration monitoring technology:
1. Medição distribuída contínua de temperatura e vibração sem pontos cegos de medição
2. Detecção simultânea e localização precisa de múltiplos eventos
3. Fiber optic is a sensor that combines transmission and sensing
4. 40 quilômetros de distância de medição ultra longa, informações de medição ricas
5. Velocidade de resposta rápida, alarme dentro 1 segundo
6. Transmissão de sinal óptico, completamente isolado eletricamente, resistente a interferência eletromagnética
7. Segurança intrínseca, adequado para operação de longo prazo em ambientes inflamáveis e explosivos
8. Medição estável e confiável com baixa taxa de alarmes falsos
9. Longa vida útil das fibras ópticas, até 30 anos sem manutenção
Performance characteristics of sistema distribuído de monitoramento de vibração de fibra óptica:
Longa distância de temperatura: 40quilômetros
Tempo de resposta rápido: típico 1 segundo
Alta precisão de posicionamento: 2-50eu
Alta sensibilidade: pode perceber vibrações dentro de 40 m ao redor do cabo óptico
Monitoramento simultâneo de vibração e temperatura
Função de monitoramento on-line para falhas de fibra óptica
Software de usuário amigável que fornece uma interface visual
Performance indicators of sistema distribuído de monitoramento de vibração de fibra óptica:
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 segundo
Measurement channels 1, 2, 4, 8
Vibration signal bandwidth ≤ 5KHz
Vibration measurement sensitivity ≤ 40m
Faixa de medição de temperatura -100 ℃~200 ℃
Sensor de temperatura de fibra óptica, Sistema de monitoramento inteligente, Fabricante distribuído de fibra óptica na China
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