Distributed Fiber Optic Pipeline Cable Vibration Perimeter Security Monitoring System-INNO

Distributed optical fibers can achieve monitoring of sound, temperatuur, trilling, enz. in long-distance structures, and use phase OTDR technology to provide feedback on the refractive index changes and optical phase changes caused by fiber compression vibration. The fiber optic vibration monitoring and early warning system can achieve long-distance transmission of heating pipeline leakage monitoring, pipeline transmission anti-theft excavation, human damage and construction, enz. It can monitor the fiber optic monitoring and early warning system in real time, identify time-frequency and other characteristics, and give timely warnings.

Distributed fiber optic cable anti damage mining monitoring system

Why do cables need to install a Gedistribueerde glasvezel trillingsmonitoring en beveiligingsperimetersysteem?

In de afgelopen jaren, om te voldoen aan de eisen van stedelijke constructie en milieuverfraaiing, steeds meer elektriciteitsleidingen worden aangelegd met behulp van kabelmethoden. Het aandeel ondergrondse kabels in het transmissie- en distributiesysteem neemt toe, en de schaal groeit snel. Echter, tijdens de dienst, kabels worden vaak beschadigd door externe krachten, met frequente verborgen fouten en onvoorspelbare typen, locaties, en timing. De voordelen van een veilige en betrouwbare kabelvoeding worden ernstig aangetast. Daarom, ervoor zorgen dat de kabelvoeding niet wordt beschadigd door externe krachten is een urgent probleem geworden dat de afdeling energiebeheer moet oplossen. Echter, Traditionele exploitatie- en onderhoudstechnieken kunnen het groeitempo van de energie-infrastructuur niet effectief evenaren, resulterend in een enorme druk op de exploitatie en het onderhoud van kabellijnen en kabelkanalen.

This system relies on distributed fiber optic vibration sensing technology to achieve cable external damage monitoring, real-time measurement of vibration around transmission lines, positioning of abnormal locations, and identification of potential threats to the vertical distance of the optical cable, thereby effectively evaluating the level of external damage threat. This system can provide reliable transmission line anti external force damage warning function, effectively ensuring the safe operation of the power system.

The core demodulation device of the cable anti external breakage monitoring system is placed in the monitoring room, used for the output of optical signals, photoelectric conversion processing, signaal acquisitie, and can be used for event identification and alarm information processing through digital signal analysis. By combining optical multiplexing modules, it is possible to achieve polling detection of multiple lines at a single site. The device adopts a series of innovative technologies such as fiber optic single core positioning. Through real-time monitoring of destructive behaviors that pose safety hazards to cables and disturbances in the surrounding environment during construction, information is collected and analyzed to determine the location, type, and intensity of disturbances, in order to help line maintenance personnel detect cable theft, inbraak, and damage in a timely manner. This device can monitor, accurately locate, and intelligently analyze events in real-time, and can also achieve early warning of accidents, effectief oplossen van de vroegtijdige waarschuwing en monitoring van kabelschade, alarmeren, intelligente analyse, en ondersteunende besluitvormingsondersteuning voor dienstdoend personeel.

Het hardwareapparaat van het gedistribueerde glasvezeltrillingsperimeterbeveiligingsbewakingssysteem gebruikt een standaardstructuur, met een compacte interne structuur en sterke stabiliteit, die kan worden geïnstalleerd in de kast van de communicatieruimte van het onderstation. De installatie van het apparaat is handig, en kan worden voltooid door eenvoudigweg een enkel uiteinde van een optische glasvezelkabel aan te sluiten. Uitgerust met een ingebouwde harde schijfmatrix, het kan monitoringgegevens voor een lange periode opslaan. Door gebruik te maken van netwerkinterfaces en draadloze transmissie, monitoring op afstand en datatransmissie zijn mogelijk.

Distributed fiber optic pipeline anti damage safety vibration monitoring system

The application of distributed fiber optic vibration sensing technology in the prevention of external force damage to power cable pipelines is based on the principle of using the interference mechanism of OTDR (optical time domain reflectometer, OTDR) optical time domain reflectometer to test external disturbances. The pressure (trilling) generated by external disturbances on or near the optical cable causes a change in the phase of Rayleigh scattering light in the optical fiber. Due to the interference effect, the phase change of light will cause a change in light intensity. By monitoring the interference effect of the backward Rayleigh scattering signal at different times in real time, the position of the vibration signal can be located. By establishing a data model of the environmental characteristic parameters of the optical cable line and an alarm monitoring threshold model, the false alarm rate of monitoring alarms can be reduced.

Composition:

The distributed fiber optic vibration sensing system (anti external force damage system) consists of sensing fiber, vibration sensing monitoring alarm host, and vibration sensing monitoring alarm software.

Intrusion pattern recognition:

The distributed fiber optic vibration sensing system (anti external force damage system) can detect third-party illegal intrusion behaviors, inclusief handmatige opgraving, indringing van voertuigen, and heavy machinery excavation, with high sensitivity and multiple recognition modes. When external vibration acts on sensing optical cables, it causes deformation of the fiber core in the cable, resulting in changes in the length and refractive index of the fiber core, and causing changes in the phase of the light waves in the cable. When light is transmitted in optical cables, it continuously generates backward transmission light. When external vibrations occur, the phase of the transmitted light changes accordingly. When these signal lights carrying external vibration information are reflected back to the system host, they are processed by the optical system to convert weak phase changes into light intensity changes. Na foto-elektrische conversie en signaalverwerking, they enter the computer for data analysis. The system determines the occurrence of an intrusion event based on the analysis results, and calculates the vibration distance through the speed of light based on the arrival time of backward transmitted light to confirm the intrusion location.

Application cases

The distributed fiber optic vibration sensing system (anti external force damage system) currently has relevant application cases in China. It uses existing communication optical cables in power submarine cables to accurately detect vibrations around the cables, and issue accurate warnings and positioning for dangerous operations such as excavation operations and anchoring of large ships. Distributed fiber optic vibration sensing technology has been successfully applied to safety monitoring of major infrastructure such as long-distance oil and gas pipelines, stroomkabels, and submarine cables, as well as national core areas. In de afgelopen jaren, efforts have been made to explore the application of distributed fiber optic sensing technology in railway safety.

Distributed vibration fiber optic device is a safety device that utilizes fiber optic sensing technology to monitor environmental vibrations. It achieves comprehensive vibration monitoring of a specific area by laying optical fibers and utilizing their sensitivity to vibration. When the external environment vibrates, the optical signal in the fiber optic will be affected and undergo changes. Distributed vibration fiber optic products can sense the occurrence of vibration and locate and analyze it by capturing the changes in these optical signals.

Producteigenschappen

Hoge gevoeligheid: Distributed vibration fiber optic products can capture small vibration signals, even small vibrations can be “captured” by it, thus achieving precise monitoring of targets.

Nauwkeurige positionering: Once vibration occurs, this product can not only sense it, but also accurately locate the specific location of the vibration, helping people quickly find the problem.

Sterk anti-interferentievermogen: Compared with traditional electronic monitoring equipment, distributed vibration fiber optic products are not affected by electromagnetic interference and can work stably in various complex environments.

Sterk aanpassingsvermogen: This product can adapt to various lengths of laying needs, whether it is short distance or long distance, it can easily handle.

Eenvoudig te installeren en te onderhouden: The installation of distributed vibration fiber optic products is relatively simple, and maintenance is also very convenient, greatly reducing the cost of use.

Distributed vibration fiber optic systems are widely used in various fields, such as perimeter security, monitoring van pijpleidingen, and bridge health monitoring, due to their high sensitivity, nauwkeurige positionering, en sterk anti-interferentievermogen. Op het gebied van perimeterbeveiliging, it can be used to monitor illegal intrusion behavior; In the field of pipeline monitoring, it can be used to detect leaks and damages in pipelines; In the field of bridge health monitoring, it can be used to monitor the vibration situation of bridges in real time and prevent potential safety hazards.