CN106558176A - A kind of inactive component chamber door prohibits monitoring system - Google Patents
A kind of inactive component chamber door prohibits monitoring system Download PDFInfo
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- CN106558176A CN106558176A CN201611034816.1A CN201611034816A CN106558176A CN 106558176 A CN106558176 A CN 106558176A CN 201611034816 A CN201611034816 A CN 201611034816A CN 106558176 A CN106558176 A CN 106558176A
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- China
- Prior art keywords
- optical
- time domain
- domain reflectometer
- inactive component
- line terminal
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
Abstract
The present invention relates to gate inhibition's monitoring art field, discloses a kind of inactive component chamber door and prohibits monitoring system.The invention includes inactive component case entrance guard sensor, optical line terminal, WDM wave multiplexers, optical time domain reflectometer and Surveillance center；In optical line terminal side, optical line terminal optical signal and optical time domain reflectometer test signal are united two into one by WDM wave multiplexers, and optical line terminal sending signal, optical time domain reflectometer are monitored and position malice door open event；PON communication wavelengths are 1310nm or 1490nm, and the test wavelength of optical time domain reflectometer is 1550nm；Optical time domain reflectometer timing sends detection pulse and sends reflection peak performance number to Surveillance center；Surveillance center is the software systems based on GIS-Geographic Information System.The operation principle of the system is by judging whether reflection peak performance number obtains gate inhibition's state of equipment box less than alarm threshold.
Description
Technical field
The present invention relates to gate inhibition's monitoring field, more specifically, more particularly to a kind of inactive component chamber door prohibits monitoring system.
Background technology
As people grow with each passing day to the demand of information, the scale of communication network constantly expands.With intelligent acess (FTTx)
A large amount of commercializations, optical fiber laying quantity it is increasing, optical fiber cover scope it is increasingly wide, the portfolio carried by which is continuous
Increase.EPON (PON) is a kind of point-to-multipoint intelligent acess technology, with its higher bandwidth, stronger anti-interference
Ability, higher reliability and relatively low cost, it is widely used in China and all parts of the world.Wherein inactive component case (includes light
Distributor optical cross box, ONU install case, outdoor equipment and install case etc.) security there is weight to the security reliability of system operation
The impact wanted.The failure and external force for currently lacking reliable inactive component case destroys the on-line monitoring and early warning means of situation, enters
And cause system to there is potential safety hazard.Therefore, study the security on-line monitoring system of highly reliable, inexpensive inactive component case
To ensureing that communication network has safely important practical value and meaning.Contrast conditional electronic sensing technology, optical fiber sensing technology tool
Have electromagnetism interference, without the need for it is actively powered, corrosion-resistant, be easy to carry out what the conditional electronic formula sensor such as distributed measurement did not possessed
Advantage.
The content of the invention
It is an object of the invention to provide a kind of inactive component chamber door prohibits monitoring system, the equipment based on optical fiber sensing technology
Chamber door is prohibited safety monitoring system and with gate inhibition's state of each equipment box of real-time remote monitoring, and can position malice door open event in time.
The major advantage of the system is passive, reliability is high, support is long-range and multiple spot monitoring.Additionally, the system combines GIS technology,
The malice enabling of inactive component case can be positioned on map exactly to alert.The system will greatly improve the maintenance of inactive component case
Efficiency, improves the precision and accuracy of fault location, imitates so as to ensure that security of system and improve daily management and safeguard
Rate, with huge market potential value.
A kind of inactive component chamber door prohibits monitoring system, including inactive component case entrance guard sensor, optical line terminal (OLT),
WDM wave multiplexers, optical time domain reflectometer (OTDR) and Surveillance center.In optical line terminal (OLT) side, WDM wave multiplexers are by OLT light
Signal and OTDR test signals unite two into one, and OLT is used for sending signal, and OTDR is used for equipment box gate inhibition status monitoring and positions evil
Meaning door open event.PON communication wavelengths are 1310nm or the test wavelength of 1490nm, OTDR is 1550nm, therefore test will not shadow
Ring normal work wavelength communication.OTDR timings send detection pulse and send reflection peak performance number to Surveillance center.Reflection peak
Diverse location represents different equipment boxs, and when the door is open, its corresponding reflection peak disappears.Surveillance center is carried out to data point
Analysis, and situation is monitored to user's real-time exhibition.Surveillance center is the software systems based on GIS-Geographic Information System (GIS), respectively
Planting device resource includes that OTDR and equipment box are marked all on map.Therefore, user can be visually observed that communication line and
The distribution of equipment box and alarm situation.
Inactive component case entrance guard sensor, is made up of pedestal, movable axis, three part of buffer shaft.Movable axis one end and pedestal
Interact, there is provided the active force of curved fiber link；The other end is interacted with buffer shaft, there is provided cushioning effect power.Optical fiber
Link passes through the optical-fibre channel of movable axis and pedestal, is connected with pip.
When fibre-optical bending, the guided modes in optical fiber is leaked in covering and is transformed to radiation mode and causes optical power loss,
This effect is exactly bending loss.Theoretical and experimental study shows：During fibre-optical bending (macrobend), radius of curvature R is more than
One critical value, because of the added losses very little that bending causes, so that be negligible, and bending radius is when being less than critical value,
Added losses exponentially increase sharply.For refractive index saltant type single-mode fiber, if radius of curvature is R, then per unit is long
The bending loss of degree can be given by formula (1).
Approximate formula：
λ is operation wavelength, λdWavelength is off, is that fiber cores cladding relative refractive is poor, Δ=(n1-n2)/n2。
Macrobend loss is sharply increased to be caused by the exponential term in formula (1).As shown in figure 1, with bending radius
Reduction, bending loss of optical fiber constantly increases.Until being reduced to a certain value, drastically will increase suddenly due to bending the loss for bringing
Greatly.From bending loss of optical fiber principle and OTDR end face reflection principles, at closing time, door compresses buffer shaft, promotion activity axial direction
Interior motion, monitored optical fiber do not bend, bending loss of optical fiber very little, have a very high-power reflection peak and are detected by OTDR
Arrive；If there is improper door opening action, buffer shaft loses the pressure of door, and spring promotes movable axis outwards to eject, and monitored optical fiber is tight
Bend again, bending loss of optical fiber is increased dramatically, reflection peak power is reduced, work(is alerted so as to realize that inactive component case malice is opened the door
Energy.
Compared with prior art, equipment box gate inhibition safety monitoring system of the present invention based on optical fiber sensing technology can be real-time
Gate inhibition's state of each equipment box is remotely monitored, and positions malice door open event in time.The major advantage of the system is passive, reliable
Property it is high, support long-range and multiple spot monitoring.Additionally, the system combines GIS technology, passive setting can be positioned exactly on map
Standby case malice is opened the door and is alerted.The system will greatly improve the efficiency of inactive component case maintenance, improve the precision and standard of fault location
True property, so as to ensure that security of system and improve daily management and maintenance efficiency, with huge market potential value.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the graph of a relation of bending loss of optical fiber of the present invention and bending radius.
Fig. 2 is that inactive component chamber door of the present invention prohibits sensor structure figure.
Fig. 3 is system block diagram of the present invention.
Fig. 4 is system testing design sketch of the present invention, wherein, Fig. 4 (a) is reflection peak power diagram under on off state,
Fig. 4 (b) is repeated test experiments, and Fig. 4 (c) is the alarm map page.
Specific embodiment
Below in conjunction with the accompanying drawings the preferred embodiments of the present invention are described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent clearly defines so as to make to protection scope of the present invention.
Refering to shown in Fig. 2, the present invention provides a kind of inactive component chamber door and prohibits monitoring system, including inactive component chamber door prohibits biography
Sensor, optical line terminal (OLT), WDM wave multiplexers, optical time domain reflectometer (OTDR) and Surveillance center.At optical line terminal (OLT)
OLT optical signals and OTDR test signals are united two into one by side, WDM wave multiplexers, and OLT is used for sending signal, and OTDR is used for equipment
Chamber door is prohibited status monitoring and positions malice door open event.PON communication wavelengths are 1310nm, and the test wavelength of OTDR is 1550nm,
Therefore test does not interfere with normal work wavelength communication.OTDR timings send detection pulse and send reflection peak performance number to monitoring
Center.The diverse location of reflection peak represents different equipment boxs, and when the door is open, its corresponding reflection peak disappears.Surveillance center
Data are analyzed, and situation are monitored to user's real-time exhibition.Surveillance center is one based on GIS-Geographic Information System (GIS)
Software systems, various device resources include that OTDR and equipment box are marked all on map.Therefore, user can be visually observed that
The distribution of communication line and equipment box and alarm situation.
Inactive component chamber door prohibits sensor construction as shown in Fig. 2 being made up of pedestal, movable axis, three part of buffer shaft.Activity
Axle one end is interacted with pedestal, there is provided the active force of curved fiber link；The other end is interacted with buffer shaft, there is provided buffering
Active force.Optical fiber link passes through the optical-fibre channel of movable axis and pedestal, is connected with pip.By bending loss of optical fiber principle and
OTDR end face reflections principle understands that at closing time, door compression buffer shaft promotes movable axis inwardly to move, and monitored optical fiber is not curved
Folding, bending loss of optical fiber very little have a very high-power reflection peak and are detected by OTDR；If there is improper door opening action,
Buffer shaft loses the pressure of door, and spring promotes movable axis outwards to eject, and monitored optical fiber seriously bends, and bending loss of optical fiber is drastically
Increase, reflection peak power are reduced, so as to realize inactive component case malice enabling alarm function.
The reflection peak performance number of OTDR real-time monitorings is very sensitive to the change that inactive component chamber door prohibits switch, by monitoring
Reflection peak performance number can accurately and real-time monitor gate inhibition's state of inactive component case.During enabling, reflection peak performance number is about
Whether less than alarm threshold i.e. shown in 11.91dB such as Fig. 4 (a), alarm threshold is set as 12dB, by judging reflection peak performance number
Gate inhibition's state of equipment box is obtained.The system has shown in good repeatability and reliability such as Fig. 4 (b).Such as Fig. 4 (c),
When inactive component case is maliciously opened, the alarm map page will be accurately positioned the equipment box reported to the police on map.
The present invention operation principle be：By judging that whether reflection peak performance number is obtained equipment box less than alarm threshold
Gate inhibition's state.At closing time, door compression buffer shaft, promotes movable axis inwardly to move, and monitored optical fiber does not bend, fibre-optical bending
Loss very little, has a very high-power reflection peak and is detected by OTDR；If there is improper door opening action, buffer shaft loses door
Pressure, spring promote movable axis outwards eject, monitored optical fiber seriously bends, and bending loss of optical fiber is increased dramatically, reflection peak
Power is reduced, so as to realize inactive component case malice enabling alarm function.When inactive component case is maliciously opened, map is alerted
The page will be accurately positioned the equipment box reported to the police on map.
Although being described in conjunction with the accompanying embodiments of the present invention, patent owner can be in claims
Within the scope of make various modifications or modification, as long as less than the present invention claim described by protection domain, all should
Within protection scope of the present invention.
Claims (3)
1. a kind of inactive component chamber door prohibits monitoring system, including inactive component case entrance guard sensor, optical line terminal, WDM close ripple
Device, optical time domain reflectometer and Surveillance center；In optical line terminal side, when WDM wave multiplexers are by optical line terminal optical signal and light
Domain reflectometer test signal unites two into one, optical line terminal sending signal, and optical time domain reflectometer is monitored and positions malice enabling thing
Part；PON communication wavelengths are 1310nm or 1490nm, and the test wavelength of optical time domain reflectometer is 1550nm；Optical time domain reflectometer is fixed
When send detection and pulse send reflection peak performance number to Surveillance center；Surveillance center is one based on the soft of GIS-Geographic Information System
Part system.
2. inactive component case entrance guard sensor according to claim 1, it is characterised in that：The inactive component chamber door prohibits sensing
Device includes pedestal, movable axis, buffer shaft and optical fiber link；Movable axis one end is interacted with pedestal, there is provided curved fiber link
Active force；The other end is interacted with buffer shaft, there is provided cushioning effect power；Optical fiber link passes through the optical fiber of movable axis and pedestal
Passage, is connected with pip.
3. the reflection peak performance number of optical time domain reflectometer real-time monitoring according to claim 1 is 11.91dB, sets alarm
Threshold value is 12dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034816.1A CN106558176A (en) | 2016-11-23 | 2016-11-23 | A kind of inactive component chamber door prohibits monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034816.1A CN106558176A (en) | 2016-11-23 | 2016-11-23 | A kind of inactive component chamber door prohibits monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106558176A true CN106558176A (en) | 2017-04-05 |
Family
ID=58444881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611034816.1A Pending CN106558176A (en) | 2016-11-23 | 2016-11-23 | A kind of inactive component chamber door prohibits monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3119281A1 (en) * | 2021-01-27 | 2022-07-29 | Centre France Ingenierie Technique Cfi Tech | Method for controlling a network deployed by fiber optics. |
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| US20090295579A1 (en) * | 2008-05-29 | 2009-12-03 | Commscope, Inc. Of North Carolina | Optical fiber systems and methods for monitoring remote door access |
| CN103456117A (en) * | 2013-08-30 | 2013-12-18 | 常州市开拓科联通信设备有限公司 | Method and device for detecting open state of door of cross connecting cabinet |
| CN103548304A (en) * | 2011-04-19 | 2014-01-29 | 霍华德大学 | System and method of detecting and locating intermittent and other faults |
| CN105509778A (en) * | 2015-12-24 | 2016-04-20 | 浙江中电智能科技有限公司 | Remote optical fiber door cover switch monitoring system |
-
2016
- 2016-11-23 CN CN201611034816.1A patent/CN106558176A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090295579A1 (en) * | 2008-05-29 | 2009-12-03 | Commscope, Inc. Of North Carolina | Optical fiber systems and methods for monitoring remote door access |
| CN103548304A (en) * | 2011-04-19 | 2014-01-29 | 霍华德大学 | System and method of detecting and locating intermittent and other faults |
| CN103456117A (en) * | 2013-08-30 | 2013-12-18 | 常州市开拓科联通信设备有限公司 | Method and device for detecting open state of door of cross connecting cabinet |
| CN105509778A (en) * | 2015-12-24 | 2016-04-20 | 浙江中电智能科技有限公司 | Remote optical fiber door cover switch monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 冯伟然等: "基于光纤传感技术的无源设备箱门禁监测系统", 《中国科技论文在线HTTP://WWW.PAPER.EDU.CN/RELEASEPAPER/CONTENT/201610-169》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3119281A1 (en) * | 2021-01-27 | 2022-07-29 | Centre France Ingenierie Technique Cfi Tech | Method for controlling a network deployed by fiber optics. |
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Application publication date: 20170405 |