CN206096279U - Leaky cable on -line monitoring system - Google Patents
Leaky cable on -line monitoring system Download PDFInfo
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- CN206096279U CN206096279U CN201620483387.5U CN201620483387U CN206096279U CN 206096279 U CN206096279 U CN 206096279U CN 201620483387 U CN201620483387 U CN 201620483387U CN 206096279 U CN206096279 U CN 206096279U
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Abstract
The utility model discloses a leaky cable on -line monitoring system, including monitor cell, communication link and network management, monitor cell carries out the information interaction through communication link with the network management, monitor cell adopts monitoring host computer, monitoring host computer is including the radio frequency circuit module who is used for sending radiofrequency signal to leaky cable, a signal reception module for radiofrequency signal that receive reflection returns, a signal processing module and circulator for being based on the radiofrequency signal that reflects judges whether leaky cable exists the position of trouble and fault point, leaky cable's one end is connected to radio frequency circuit module's output through the circulator, leaky cable's the input with one end connection signal reception module, the signal reception module still links to each other with signal processing module, signal processing module links to each other with the network management through communication link, communication link includes photoelectric conversion module and lightning conversion module. The utility model discloses can monitor the precision height to the fault point accurate positioning, monitoring range is big, is applicable to the leaky cable's of various length and various frequencies monitoring.
Description
Technical field
The utility model is related to track traffic wireless communication system leaky cable monitoring technical field, more particularly to a kind of
Leakage cable on-line monitoring system.
Background technology
The running quality of track traffic and Line for Passenger Transportation wireless communication system is with organization of rail transport and operation safety closely
It is related.Because in tunnel, the propagation of radio magnetic wave is restricted, cause communication not smooth, therefore, wireless communication system is used
Leaky cable (hereinafter referred to as leaking cable) carries out communication network covering, it is ensured that the propagation of radio magnetic wave is unrestricted, to ensure car
Ground data transfer it is unobstructed.
In the daily operation maintenance of wireless communication system network, the peace of the performance of leaky cable system to cordless communication network
Row for the national games has critically important impact.The failure of passive device is the subject matter in whole RF wireless systems, joint, wire jumper,
The probability that phase modulation head, arrester and direct current obstructing instrument etc. go wrong accounts for the overwhelming majority, leaks fractureing, deform and damaging for cable, connects
Mouthful loosening, water inlet and mist corrosion, the part in the damage of antenna and installation process is lack of standardization etc. to affect the quality of circuit.With
The operation for wireless communication system is open-minded, due to equipment quality problem or project installation problem, joint that part leakage cable is connected,
Wire jumper, phase modulation head, arrester and direct current obstructing instrument will initially enter the Frequent Troubles phase.
For the failure problems that leaky cable system occurs, current solution mainly has off-line type monitoring, band monitoring
The repeater of function, transmitting receiving type are monitored and passive type on-line monitoring.Off-line type monitoring is tested after failure occurs,
Can not monitor on-line, poor in timeliness；Repeater with monitoring function does not have positioning function, monitors to need to survey again after reporting to the police
Examination；Transmitting receiving type monitoring is divided into transmitting and receives, and set of system has two equipment, high to power reguirements, it is impossible to the single electricity of detection
The short tunnel in source and the leakage cable at tunnel two ends, not with versatility；The signal of leakage cable transmission is extracted in passive type monitoring, extracts signal
Difficulty is very big, and rate of failing to report is high.Generally speaking, online solution conventional at present is broadly divided into standing-wave ratio detection and slave
Monitor two big class, the former is only to carry out warning function, it is impossible to positioned, and needs professional and technical personnel's handling failure, take and not
Just；The latter is to be detected that testing result is affected larger by outdoor temperature using two active equipments, and rate of false alarm is high.
Utility model content
The purpose of this utility model is to provide a kind of leakage cable online monitoring system, and trouble point can be accurately positioned, and is supervised
High precision is surveyed, monitoring range is big, it is adaptable to the monitoring of the leakage cable of various length and various frequencies.
For achieving the above object, the utility model is adopted the following technical scheme that：
One kind leakage cable on-line monitoring system, including monitoring unit, communication link and webmaster, the monitoring unit Jing communication chains
Road carries out information exchange with webmaster, and using monitoring main frame, monitoring main frame is included for sending radio frequency to leakage cable the monitoring unit
The RF circuit module of signal, the signal receiving module for receiving the radiofrequency signal for reflecting, for according to reflecting
Radiofrequency signal judge signal processing module and circulator of the leakage cable with the presence or absence of the position of failure and trouble point, radio circuit mould
One end of the output end Jing circulator connection leakage cable of block, same one end for leaking cable connects the input of signal receiving module, and signal connects
Receive module to be also connected with signal processing module, signal processing module Jing communication links are connected with webmaster；Communication link includes photoelectricity
Modular converter and electrooptic conversion module, communication link is used to change monitoring signals and be transmitted；The webmaster is used for prison
The data for surveying unit transmission are analyzed and show, and send control instruction to monitoring unit.
The monitoring main frame also includes signal combining module, and the output end of RF circuit module connects signal by circulator
The input of combining module, signal combining module is connected with one end of leakage cable, signal combining module also Jing circulators connection signal
The input of receiver module, the RF circuit module is also connected with signal processing module.
The monitoring unit also include monitoring jumper and monitoring reflexless terminal, monitoring jumper be connected across two sections leakage cables it
Between, monitoring reflexless terminal is arranged on Lou cable tail end.
Also include field management unit, monitoring unit carries out information exchange by communication link and field management unit, existing
The output end connection webmaster of field administrative unit, field management unit is used for the data summarization of monitoring unit and is uploaded to webmaster,
The control instruction that webmaster is issued is sent to monitoring unit simultaneously.
The monitoring unit has multiple stage, and each monitoring unit is respectively provided with unique numbering and IP, multiple stage monitoring unit and existing
Y-connection is adopted between the administrative unit of field；The field management unit also has multiple stage, and each field management unit is respectively provided with only
One numbering, between multiple stage field management unit and webmaster Y-connection is also adopted by.
The utility model has advantages below：
(1) precision of monitoring unit described in the utility model is adjustable, and monitoring accuracy is up to centimetre rank, monitoring accuracy
It is high；
(2) detection signal used by monitoring unit is different from leakage cable operating frequency, does not affect the normal work for leaking cable, and supervises
Survey unit and there is automatic regular polling detection function, be user-friendly to, while equipment power dissipation can be reduced, increase equipment life；
(3) monitoring unit can simultaneously monitor a plurality of leakage cable, and different sections leakage cable can be monitored across repeater,
The number of monitoring unit, reduces cost can be reduced；
(4) using special network management system, positioning analysis can be carried out to leaking cable trouble point and defective device is shown, be maintenance
The maintenance in the human world provides foundation, meanwhile, also there are webmaster data to preserve and query function, facilitate technical staff to leak the failure of cable
Situation is checked and analyzed, to formulate perfect maintenance program；
(5) this monitoring system is not only suitable for the monitoring of Lou cable, is also applied for monitoring antenna transmission system, practical.
Description of the drawings
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the theory diagram of monitoring main frame described in the utility model；
Fig. 3 is networking schematic diagram of the present utility model；
Fig. 4 is the data transmission link figure of embodiment described in the utility model；
Fig. 5 is the data transmission link figure of embodiment described in the utility model two.
Specific embodiment
Embodiment one
As shown in Figures 1 to 4, the utility model includes monitoring unit, field management unit, communication link and webmaster, prison
Survey unit carries out information exchange by communication link and field management unit, and field management unit is also connected with webmaster, and monitoring is single
Unit is input in Lou cable for producing swept-frequency signal, and the radiofrequency signal being reflected back according to leakage cable judges that leakage cable whether there is failure
And the position of trouble point, and give field management unit by transmitting fault information；Field management unit is used to monitor monitoring unit
To data summarization and be uploaded to webmaster, while the control instruction that webmaster is issued is sent to monitoring unit；Webmaster is used for existing
The data that field administrative unit sends are analyzed and show, and the data monitored according to monitoring unit send control instruction.
Monitoring unit includes monitoring main frame and monitoring reflexless terminal, and monitoring main frame includes RF circuit module, circulator, letter
Number combining module, signal receiving module and signal processing module, the output end of RF circuit module connects signal by circulator
The input of combining module, signal combining module is connected with leakage cable, and signal combining module also Jing circulators connection signal receives mould
The input of block, the output end of signal receiving module connects the input of signal processing module, signal processing module also Jing communications
Link is connected with field management unit, and radio-frequency line module is also connected with signal processing module.RF circuit module produces frequency sweep
Signal is simultaneously sent to leakage cable, and signal receiving module receives the radiofrequency signal that leakage cable is reflected back, and signal processing module is used to judge leakage
Cable transmits fault message to webmaster with the presence or absence of failure and the position of trouble point by field management unit, meanwhile, webmaster
The control signal Jing field management unit for issuing is transmitted to monitoring main frame；Circulator transmits signal unidirectional loop, signal combining
Module is used to be combined the signal that radio circuit reflects with repeater signal；Monitoring reflexless terminal is arranged on the tail of Lou cable
End, for absorbing the radiofrequency signal of leakage cable tail end, prevents signal reflex and affects testing result.Monitoring main frame and monitoring matching are eventually
End is connected respectively with repeater, and repeater is the existing apparatus of wireless transmitting system, repeats no more.
According to the characteristic of leakage cable, for the leakage cable of impedance perfect matching, the signal of Lou cable is sent to passing completely
The characteristic of defeated zero reflection, and in practical application, when leakage cable breaks down, the impedance Incomplete matching of cable is leaked, it is sent to leakage cable
Signal can reflex to transmitting terminal, cause reflected signal to strengthen.The utility model judges event using the detection to reflected signal
The distance and fault degree of barrier point.
When signal processing module is processed signal, the difficult point very time-consuming to evade integral and calculating, the utility model
It is middle to be processed by the way of frequency domain process, calculated according to the convolution principle of Fourier transformation in a frequency domain, input signal
Fourier transformation carry out convolution with the Frequency Response of cable of being leaked hunting, then again inverse Fourier transform is carried out to convolution results, obtain
The standing-wave ratio information that monitored leakage cable is obtained after time-domain information is obtained, so as to carry out threshold decision to leaking cable.Product in time domain
Divide and described with the convolution in frequency domain, can quickly calculate step response characteristic.
The accuracy of detection formula of monitoring system is in the utility model：
In formula：
A-accuracy of detection；
C-the light velocity；
vp- velocity coeffficient；
P-measurement points；
Δ F-sweep bandwidth.
Measurement range Z of monitoring system is：
When monitoring unit is monitored to leaking cable, detected to leaking cable by receiving the swept-frequency signal for returning, so monitoring
The swept-frequency signal of main frame transmitting has been made once to come and go in leakage cable, its dynamic range and alarm threshold and monitored leakage cable length
Relation be：
In formula：
The length of D-monitored leakage cable；
The total length of Z-can monitor, unit is rice；
Hundred meters of losses of X-leakage cable；
RL0Return loss value corresponding to-standing-wave ratio fault threshold.
Wherein, return loss is with the relation of standing-wave ratio：
In formula：
VSWR-standing wave ratio.
The process that signal processing module is processed signal has prior art, and emphasis of the present utility model does not lie in letter
Number processing module is processed signal, therefore is repeated no more.
Field management unit includes device channels selecting module and software model, and software model has identification work(
Can, it is identified by the IP information to monitoring unit and webmaster, webmaster and monitoring unit can be made to select by device channels
Module is communicated.
In the present embodiment, monitoring unit is arranged in the machine room of repeater, and field management unit is arranged in base station machine room.
Communication link includes photoelectric conversion module and electrooptic conversion module, the signal Jing electro-optic conversion moulds that monitoring unit sends
Block switchs to after optical signal, and Jing optical cables carry out long-distance transmissions, and switch to electric signal access field management by photoelectric conversion module
Unit；The signal that field management unit sends carries out long-distance transmissions Jing after electrooptic conversion module switchs to electric signal by optical cable,
And electric signal access monitoring unit is converted into by photoelectric conversion module, long distance can be realized with reduce loss using optical cable transmission
From transmission.
In the utility model, monitoring unit has n, and n=1,2 ... ..., n-1, n, each monitoring unit is respectively provided with only
Y-connection is adopted between one numbering and IP, n monitoring unit and field management unit, i.e., n monitoring unit is by logical
Letter link connection field management unit, field management unit has N number of, and N=1,2 ... ..., N-1, N, each field management unit is equal
With unique numbering, Y-connection is also adopted by between N platform field management units and webmaster, i.e., N number of field management unit connects
Webmaster is connect, the data transfer that n*N monitoring unit is monitored, can be in Control Room and communication workshop checking monitoring to webmaster
State.
Embodiment two：
As shown in Fig. 1 to Fig. 3 and Fig. 5, monitoring unit includes monitoring main frame, monitoring jumper and monitoring reflexless terminal, prison
Surveying main frame is used to produce swept-frequency signal and swept-frequency signal is input in Lou cable, and according to the radiofrequency signal that leakage cable is reflected back leakage is judged
Transmitting fault information is given field management unit by cable with the presence or absence of failure and the position of trouble point；In onsite application, repeater
The leakage cable at two ends is independent, and monitoring jumper is connected across between two sections of leakage cables, and monitoring jumper can reduce monitoring main frame
Quantity, reduces cost；Monitoring reflexless terminal is arranged on Lou cable tail end, for absorbing the radiofrequency signal of leakage cable tail end, anti-stop signal
Reflect and affect testing result.
The embodiment two that differs only in of embodiment two and embodiment one includes leakage cable jumper, and other are and embodiment
One is identical.
By taking GSM-R leakage cables as an example, the operating frequency of Lou cable is avoided, and select and can very well reflect leakage cable working status
Scan frequency, trueness error is not more than 5 meters, configuration monitoring main frame scanning initial frequency 780MHz, terminates frequency 820MHz, surveys
Amount points 1033, monitoring leakage cable 0 meter of distance of starting, monitoring leakage cable terminate 2000 meters of distance, 0.88, hundred meters of losses of velocity coeffficient
2.20th, three-level alarming threshold is respectively 1.5,1.8,2.0.Then accuracy of detection is：
Measurement range Z is：
According to set parameter, when alarming threshold value is 1.5, return loss value is：
Then dynamic range requirement：
This monitoring leakage cable length is 2000 meters, more than cable length is leaked between two adjacent repeaters, so application scheme can
With reference to Fig. 5, the leakage cable at repeater two ends is bridged by monitoring jumper, extend the monitored distance for leaking cable and not shadow
Ring the connected mode between repeater and leakage cable.
The utility model can be accurately positioned to trouble point, and monitoring accuracy is high, and monitoring range is big, it is adaptable to various length and
The monitoring of the leakage cable of various frequencies, while being also applied for monitoring antenna transmission system, applied range is practical.
Present aspect concrete application approach is a lot, and above-mentioned is only preferred embodiment of the present utility model, without departing from this reality
On the premise of with new principle, some improvement can also be made, these improvement are also considered as protection domain of the present utility model.
Claims (3)
- It is 1. a kind of to leak cable on-line monitoring system, it is characterised in that：Including monitoring unit, communication link and webmaster, the monitoring list First Jing communication links carry out information exchange with webmaster, and the monitoring unit is included for leakage using monitoring main frame, monitoring main frame Cable send radiofrequency signal RF circuit module, for receive reflect radiofrequency signal signal receiving module, for root According to the radiofrequency signal for reflecting leakage cable is judged with the presence or absence of failure and the signal processing module and circulator of the position of trouble point, One end of the output end Jing circulator connection leakage cable of RF circuit module, the same one end for leaking cable connects the input of signal receiving module End, signal receiving module is also connected with signal processing module, and signal processing module Jing communication links are connected with webmaster；Communication link Including photoelectric conversion module and electrooptic conversion module；The monitoring main frame also includes signal synthesizing module, and the output end of RF circuit module connects signal synthesis by circulator The input of module, signal synthesizing module is connected with one end of leakage cable, and signal synthesizing module also Jing circulators connection signal is received The input of module, the RF circuit module is also connected with signal processing module；The monitoring unit also includes monitoring jumper and monitoring reflexless terminal, and monitoring jumper is connected across between two sections of leakage cables, Monitoring reflexless terminal is arranged on Lou cable tail end.
- 2. one kind as claimed in claim 1 leaks cable on-line monitoring system, it is characterised in that：Also include field management unit, prison Survey unit carries out information exchange by communication link and field management unit, and the output end connection webmaster of field management unit is existing Administrative unit is used for the data summarization of monitoring unit and is uploaded to webmaster, at the same by the control instruction that webmaster is issued send to Monitoring unit.
- 3. one kind as claimed in claim 2 leaks cable on-line monitoring system, it is characterised in that：The monitoring unit has multiple stage, often Individual monitoring unit is respectively provided with unique numbering and IP, and Y-connection is adopted between multiple stage monitoring unit and field management unit；Institute Stating field management unit also has multiple stage, and each field management unit is respectively provided with unique numbering, multiple stage field management unit and net Y-connection is also adopted by between pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620483387.5U CN206096279U (en) | 2016-05-25 | 2016-05-25 | Leaky cable on -line monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620483387.5U CN206096279U (en) | 2016-05-25 | 2016-05-25 | Leaky cable on -line monitoring system |
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| CN206096279U true CN206096279U (en) | 2017-04-12 |
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| CN201620483387.5U Expired - Fee Related CN206096279U (en) | 2016-05-25 | 2016-05-25 | Leaky cable on -line monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405265A (en) * | 2016-05-25 | 2017-02-15 | 通号（郑州）轨道交通科技有限公司 | Leaky cable online monitoring system |
| CN109927763A (en) * | 2019-04-12 | 2019-06-25 | 杨馨 | Rail traffic wireless transmission signal intellectual monitoring and early warning system and its method |
| CN110850239A (en) * | 2019-11-01 | 2020-02-28 | 索亮 | Leaky cable on-line monitoring method and device based on SDR platform and storage medium |
-
2016
- 2016-05-25 CN CN201620483387.5U patent/CN206096279U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405265A (en) * | 2016-05-25 | 2017-02-15 | 通号（郑州）轨道交通科技有限公司 | Leaky cable online monitoring system |
| CN106405265B (en) * | 2016-05-25 | 2023-05-19 | 通号电缆集团有限公司 | Leakage cable on-line monitoring system |
| CN109927763A (en) * | 2019-04-12 | 2019-06-25 | 杨馨 | Rail traffic wireless transmission signal intellectual monitoring and early warning system and its method |
| CN110850239A (en) * | 2019-11-01 | 2020-02-28 | 索亮 | Leaky cable on-line monitoring method and device based on SDR platform and storage medium |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180413 Address after: 450016 Henan Zhengzhou economic and Technological Development Zone Fourth Avenue East, north two road south, the sixth floor of the thriving building. Patentee after: CRSC CABLES CO.,LTD. Address before: 450016, No. sixth, 601-605 floor, flourishing building, Fourth Street, Zhengzhou economic and Technological Development Zone, Henan Patentee before: CRSC (ZHENGZHOU) RAILWAY TRANSPORTATION TECHNOLOGY LTD. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |