Ibinahagi ang fiber optic sensing pipeline leakage temperature vibration DTS, DVS, ANG, pakinabang-INNO

Panimula sa Distributed Fiber Optic Acoustic Sensing System

A measurement system developed based on distributed fiber optic sensing technology. It is a comprehensive new distributed fiber optic sensing technology system that integrates multiple disciplines such as optics, electronics, mechanics, at digital signal processing, based on the Rayleigh scattering effect generated by optical signals during fiber optic propagation and the principle of optical time domain reflectometry (OTDR) teknolohiya. Sa sistemang ito, optical fibers are both devices for transmitting optical signals and sensing external information. Samakatuwid, they can continuously and quickly measure external acoustic and vibration information along the fiber optic cable.

Advantages and Applications of Mga Ibinahagi na Fiber Optic Sensor

It has many advantages such as low loss, maliit na sukat, magaan ang timbang, mataas na sensitivity, malakas na paglaban sa kaagnasan, anti electromagnetic interference, no need for power supply, at mababang gastos, which make up for the shortcomings of traditional electrical sensors in monitoring range and system reliability, and have achieved rapid development in just a few decades. People have successfully achieved the measurement of changes in temperature, concentration, presyon, panginginig ng boses, displacement, 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, aerospace, pagsubaybay sa pipeline, power engineering, and biomedical research. Sa kanila, the most practical value is undoubtedly the distributed fiber optic sensing system.

Ibinahagi ang sensor ng temperatura ng fiber optic for substations

The fiber optic temperature measurement system used for substation temperature monitoring can accurately and timely locate temperature anomalies on a single fiber optic cable through distributed fiber optic temperature testing based on Raman scattering temperature measurement technology; Kasabay nito, the system is equipped with multi-level temperature alarm values and temperature rise rate alarms, displaying temperature distribution curves in real time, and providing early warning before a fire occurs. This solves the problem that existing temperature measurement systems can only passively set a temperature threshold, which is prone to misjudgment and cannot accurately locate the location of the accident point. Ang ibinahagi na pagsubok sa temperatura ng hibla batay sa teknolohiya ng pagsukat ng temperatura ng Raman na nakakalat ay maaaring tumpak at napapanahong mahanap ang mga anomalya ng temperatura sa isang hibla; Kasabay nito, ang system ay nilagyan ng mga multi-level constant temperature alarm values at temperature rise rate alarms, displaying temperature distribution curves in real time, and providing early warning before a fire occurs, lubos na binabawasan ang posibilidad ng sunog sa substation.

Oil pipeline leakage temperatura vibration host

Sa kasalukuyan, Ang mga pipeline ng langis at gas ay isang mahalagang bahagi ng engineering ng petrolyo at natural gas. Dahil sa kaagnasan, mga depekto sa hinang, panlabas na vibrations, at maging ang pagnanakaw at pinsala, pagtagas ng pipeline, pinsala sa anti-corrosion coatings, at mga tagas at kaagnasan sa mga koneksyon sa pipeline tulad ng mga flanges, sinulid buckles, at ang mga packing box ay lalong naging malala. Ang pagtagas ng pipeline ay hindi lamang nagdudulot ng sagabal sa transportasyon, but also pollutes the environment and even triggers accidents such as explosions and fires, requiring a significant amount of manpower and resources for monitoring, pagpapanatili, and management. So early prevention, timely warning, and location of pipeline leaks have very important practical significance.

Kasabay nito, oil and gas need to be heated during transportation to promote flow. The heating device heats the oil to a certain temperature and then transports it in pipelines. Gayunpaman, excessive heating can cause resource waste and increase the cost of oil and gas transportation. How to set heating reasonably is of great significance for energy consumption control in oil and gas engineering. The temperature of oil in pipelines will decrease, forming a temperature gradient that decreases with transportation distance. Ang real-time at distributed na mga halaga ng pagsubaybay ng temperaturang ito ay maaaring magsilbing mahalagang batayan para sa kontrol ng feedback sa pag-init, na gumaganap ng mahalagang papel sa makatwirang pagkontrol sa temperatura at pagbabawas ng pagkonsumo ng enerhiya sa transportasyon.

Ang komprehensibong sistema ng pagsubaybay para sa mga pipeline ng langis at gas ay nilagyan ng mga optical cable sa loob ng mga pipeline, 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. Sa kanila, vibration signals can mainly reflect external vibrations and even theft and damage.

Ibinahagi ang fiber optic na pagsubaybay sa temperatura ng pipeline ng tubig

Once invaded by malicious excavation, pagbabarena, or geological disasters causing pipeline rupture and damage, it will be destroyed and even lead to environmental pollution and economic losses. In order to maintain safety along the pipeline and prevent human or environmental damage, it is necessary to conduct real-time online monitoring of the working status of water pipes and provide timely and accurate advance alarms for threatening intrusion events. Samakatuwid, pipeline safety monitoring technology plays an important role in maintaining pipeline transportation and has social and economic significance.

Distributed fiber optic temperature measurement system is a technology used for real-time measurement of temperature spatial distribution, which can be widely applied to temperature detection and fire warning in coal mines, mga lagusan, large buildings, transmission cables, mga cable tray, at iba pang mga lugar. Ang distributed fiber optic temperature measurement system ay pangunahing gumagamit ng prinsipyo ng spontaneous Raman scattering sa loob ng fiber optic upang masukat ang temperatura, at ginagamit ang prinsipyo ng optical time domain reflection upang mahanap at mapagtanto ang temperatura sensing system para sa pagsukat ng field ng temperatura.

Ipinamahagi ng DAS ang fiber optic acoustic vibration monitoring

Ang distributed fiber optic sensing system batay sa prinsipyo ng phase sensitive photosensitive time-domain reflection (F – OTDR) ay may mga pakinabang ng simpleng istraktura, mahabang distansya ng pagtuklas, kakayahang mahanap ang maraming kaguluhan nang sabay-sabay, mataas na resolution, at tumpak na katumpakan ng pagpoposisyon. Maaari itong ilapat sa pagsubaybay sa pagtagas ng pipeline ng supply ng tubig upang makita at mahanap ang lokasyon ng pagtagas sa real time nang hindi nagdudulot ng anumang pinsala o nakakaapekto sa normal na operasyon ng pipeline. Ibinahagi ang acoustic sensing (ANG) ay batay sa Φ – teknolohiya ng OTDR, na nakakakita ng phase signal ng backscattered na ilaw sa sensing fiber para ma-detect ang mga distributed sound o vibration signal. Hindi lamang ito nagbibigay ng impormasyon sa intensity ng kaganapan ng tunog o vibration gamit ang phase at amplitude, ngunit gumagamit din ng linear quantitative measurement values para makakuha ng sound time phase at frequency information.