INNO光纤温度传感器 ,温度监测系统.
光纤温度传感器, 智能监控系统, 中国分布式光纤制造商
 |
 |
 |
Underground pipelines are widely present in urban environments, such as water conservancy pipelines, 油气管道, thermal pipelines, 等。, and are a key part for the normal operation of the entire city. Especially with the rapid development of the economy and society, pipeline safety monitoring is increasingly valued by construction personnel and pipeline maintenance personnel in urban construction. Pipeline safety is related to the safety of people’s livelihoods and public assets, and more and more pipeline users are realizing its importance. Once a safety accident occurs in a pipeline, it can cause huge property damage and even loss of life. For the safety protection requirements of buried pipelines, traditional detection methods often rely on regular personnel inspections, which inevitably leads to untimely safety monitoring and even neglect of hazardous vibration sources. Secondly, in most scenarios, multiple pipelines intersect and multiple pipeline extension directions need to be detected simultaneously. 另外, traditional detection methods use artificial intelligence to identify vibration source patterns, but in practical application scenarios, vibration source patterns are much more common than pre fabricated items. Moreover, in combination with reality, end users only need to monitor and predict the degree of damage caused by vibration sources to pipelines to make corresponding decisions. A multi-channel long-distance monitoring method for pipeline vibration warning is urgently needed to address the above issues.
分布式光纤传感器 have many advantages, such as low loss, 体积小, light weight, 高灵敏度, strong corrosion resistance, resistance to electromagnetic interference, no need for power supply, and low cost. They make up for the shortcomings of traditional electrical sensors in monitoring range and system reliability, and have developed rapidly in just a few decades. People have successfully achieved the measurement of changes in temperature, concentration, 压力, 振动, 位移, and refractive index using various fiber optic sensors. So far, various types of fiber optic sensors have been widely used in fields such as perimeter security, 航空 航天, 管道监控, power engineering, and biomedical research. Among them, the most practical value is undoubtedly the distributed fiber optic sensing system.
这 distributed vibration sensing system uses a narrow linewidth laser as the system light source, and utilizes the coherent fading effect between backscattered Rayleigh scattering signals (RBS) to achieve distributed measurement of disturbance signals. When an external disturbance event acts on the optical fiber, the refractive index of the fiber core and the length of the fiber at the disturbance location will change, causing amplitude and phase changes in the RBS at that location. By analyzing the Rayleigh scattering curves before and after the occurrence of disturbance events, it is possible to detect dynamic disturbance events. This technology has high sensitivity, fast measurement response speed, and can achieve long-distance fully distributed dynamic monitoring without blind spots. Distributed fiber optic vibration monitoring systems have been widely used in fields such as tunnel gallery security positioning, power system cable monitoring, online monitoring of information pipelines, high-speed railway security systems, long-distance pipeline safety monitoring, and perimeter security of key facilities.
The comprehensive monitoring system for oil and gas pipelines is equipped with optical cables inside the pipelines, which are connected to the fiber optic monitoring host. The optical cables sense the vibration signals of the oil and gas pipelines in real time and transmit them to the fiber optic monitoring host to detect the leakage status of the oil and gas pipelines at different positions. Among them, vibration signals can mainly reflect external vibrations and even theft and damage.
The optical cable also senses the acoustic signals of oil and gas pipelines in real time and transmits them to the fiber optic monitoring host to detect the leakage status of oil and gas pipelines at different positions. Among them, acoustic signals can mainly reflect the situation of internal leakage. Set up a pressurization device to close the input and output ends on both sides of the oil and gas pipeline and actively pressurize them. The fiber optic monitoring host uses optical cables to perform high-precision acoustic monitoring and analysis on the pressurized oil and gas pipeline, finely detecting the damage status of the pipeline. By sealing and applying pressure, interference from other factors can be eliminated, allowing for more accurate detection of leaks.
