Sistema distribuído de monitoramento de vazamento de tubulação com tecnologia de detecção de temperatura de fibra óptica

Nos últimos anos, prefabricated insulation pipelines for urban centralized heating and cooling have developed rapidly in China and have been widely used. Pipeline leakage detection is clearly an important component of maintenance activities and has always been a challenging task. Na maioria dos casos, on-site inspections of pipelines are required to identify leakage points.

In the past few years, the use of fiber optic distributed temperature monitoring technology has been proven to be an effective method for detecting and locating pipeline leaks, through the use of optical time-domain reflection measurement (OTDR) technology for localization. As a medium for temperature sensing, how to arrange and construct optical cables reasonably, e como colocá-los melhor e mais eficazmente em várias áreas de terreno especiais para garantir a qualidade da construção de assentamento são a base da precisão da medição de temperatura da fibra óptica e a principal prioridade para o uso eficiente na fase posterior.

O fiber optic distributed pipeline monitoring system uses fiber optic as a sensor to detect pipeline leakage points by monitoring temperature changes outside the pipeline. The main principle of the DTS fiber optic distributed pipeline monitoring system is the Raman effect. A luz espalhada Raman é causada por vibrações moleculares influenciadas pelo calor, e a luz retroespalhada carrega informações sobre a temperatura local na qual ocorre a dispersão.

Sistema distribuído de medição de temperatura por fibra óptica: The system mainly consists of a distributed fiber optic temperature demodulator and a temperature measurement optical cable. The distributed fiber temperature demodulator is a distributed temperature sensing system (ETED) that continuously measures the ambient temperature of the fiber optic. It uses advanced OTDR technology and Raman scattering light’s temperature sensitive characteristics to detect temperature changes along different positions of the fiber optic, achieving truly distributed temperature measurement and positioning. As a mature fiber optic distributed temperature measurement método, this device has the advantages of long measurement distance, alta precisão de medição, velocidade de resposta rápida, interferência anti-eletromagnética, portability, etc., and can be widely used for leakage monitoring in heating pipeline networks.

The main advantages of a fibra óptica distribuída pipeline leakage temperature detection system

1. The temperature measurement medium adopts armored optical cable, which does not require external power supply, convenient construction, and no need for later maintenance;

2. Fully monitor the pipeline network without dead angles in all directions, with real-time online 24 horas, and can achieve simultaneous positioning of multiple leakage points, with a high positioning accuracy of up to 1 metro;

3. The platform software can accumulate big data and intelligently analyze to obtain the trend of changes in pipeline insulation effect.

Sensor de temperatura de fibra óptica, Sistema de monitoramento inteligente, Fabricante distribuído de fibra óptica na China