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Distributed Optical Cable Vibration Positioning Analysis System ST-DVS
Distributed fiber optic cable vibration positioning analysis system - guide you to reach the fault site in the shortest possible time! Product backgro
Product details
Distributed Optical Cable Vibration Positioning Analysis System--Guide you to reach the fault site in the shortest possible time!
Product Background:
Distributed Optical Cable Vibration Positioning Analysis SystemIt's EurasiaThe company has recently launched a new generation of optical cable maintenance and repair positioning system, which can easily achieve ground corresponding tracking and positioning of optical cable failure sites.
With the popularization of fiber optic communication, a large number of optical cables have been laid. The aging, external damage, rainwater erosion, rodent bites, foundation damage, non-standard construction and maintenance, and other impacts faced by the laying of optical cables may all cause cable failures. After a fiber optic cable fault occurs, how to efficiently troubleshoot, reduce repair time, and accurately and quickly track the geographical location of the fault point is a key requirement for users. Most oil pipeline communications are directly buried, which brings great difficulties to the location and repair of fiber optic cable faults.
When the optical cable malfunctions, the currentOTDRInstruments can only measure the fiber optic distance of the fault point, but the actual fault site is often difficult to detect. Repair personnel often need to repeatedly confirm when searching for the fault site, which consumes a lot of time and energy, and even leads to secondary accidents due to non-standard operation. If the fiber optic cable data is lacking or inaccurate, fault repair will become a nightmare for fiber optic cable maintenance personnel. Previously, due to low repair efficiency, incalculable direct and indirect losses were caused,OTDRThe instrument is powerless in this regard.
The fiber optic cable fault tracking device can significantly improve the efficiency of emergency repairs, and repair personnel canDistributed Optical Cable Vibration Positioning Analysis SystemWith the help of, it only takes two or three tracking and positioning operations to quickly locate the fault site. During the tracking process, hitting the optical cable or indirectly vibrating it until it is completely within the allowable safety range avoids violent bending and damage to the optical cable; In some cases, it is not even necessary to excavate or go down the well, nor to search for fiber optic cable splice boxes and handover boxes, greatly reducing the workload of repair personnel.
Distributed Optical Cable Vibration Positioning Analysis SystemGreatly compensated forOTDRThe shortcomings of instruments in optical cable repair have filled the gap in the industry and are an essential analysis system for the repair and maintenance of oil pipeline communication optical cables.
Product technical principle:
When light is transmitted in optical cables, due to the interaction between photons and the core lattice, Rayleigh scattered light is continuously transmitted backward, as shown in the figure1As shown. When external vibration occurs, it causes deformation of the fiber core in the optical cable, resulting in changes in the length and refractive index of the fiber core, and the phase of the backscattered Rayleigh light changes accordingly. These signal lights carrying external vibration information are reflected back to the system host and processed by the optical system to convert weak phase changes into light intensity changes. After photoelectric conversion and signal processing, they enter the computer for data analysis.
image1 Principle of Back Rayleigh Scattering
Distributed vibration detection technology:
As shown in the figure below2Chinese,The sensing cable, reflector, and all fiber interference module together form an interference structure. Light enters from the input port of the all fiber interference module,The light processed by the fiber optic interference module is input to the sensing cable,Reflected by a mirror at the end of the sensing cable,Re enter the sensing cable,Finally, returning to the all fiber interference module. The interference module is composed of optical passive components. The light that reaches the output port of the interference module through different optical paths converges here,Interference occurs,The light intensity of the output port varies with the phase difference between the interfering lights. When external disturbances act on the sensing cable,It will cause changes in the phase difference between interfering light waves. This system utilizes this principle to detect the vibration signal obtained by detecting the phase change of the transmitted light.
image2 Principle of Fiber Optic Interference
Product Introduction
- All fiber testing without radiation
- Low power consumption, long standby time
- Easy to carry and operate
- Low false alarm rate, not affected by temperature
- Testing distance is long40KM
- Accurately locate the location of the event
- Touch screen with shortcut keys, easy to operate
On site repair test results
at2019year11Month, a certain oil pipeline station is heading towards another valve chamber direction9.2A sudden fiber optic cable failure occurred at the kilometer point, and the relevant management personnel on site immediately organized personnel to locate and test the fiber optic cable failure. The distributed fiber optic cable vibration positioning analysis system can quickly determine the ground position of the breakpoint and accurately test the location of the fault point, saving a lot of time for emergency repair and reducing economic losses.
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