CN108490271A - It is a kind of distribution high ferro along electromagnetic interference real-time monitoring device and its method - Google Patents
It is a kind of distribution high ferro along electromagnetic interference real-time monitoring device and its method Download PDFInfo
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- CN108490271A CN108490271A CN201810161289.3A CN201810161289A CN108490271A CN 108490271 A CN108490271 A CN 108490271A CN 201810161289 A CN201810161289 A CN 201810161289A CN 108490271 A CN108490271 A CN 108490271A
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- G01R29/08—Measuring electromagnetic field characteristics
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- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
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Abstract
It is a kind of distribution high ferro along electromagnetic interference real-time monitoring device and its method.Multiple monitoring points are arranged in line of high-speed railway, acquire electromagnetic signal and be modulated on the light carrier of different wave length after amplifying with the photon radio-frequency acquisition front end based on straight light modulation source；Central station is transmitted to by optical fiber link in conjunction with wavelength division multiplexed mode, different channels is then divided into through Wave decomposing multiplexer, time division multiplexing processing is realized by photoswitch：Each channel is input to centralized processing module in different time-gap and carries out time domain, frequency-domain analysis and information extraction；And then realize electromagnetic interference monitoring and classification along high ferro, in particular for the monitoring of high ferro vehicle-ground wireless communication interference.The present invention uses multiple spot distributed capture and centralized processing, is detected simultaneously using time domain, frequency domain, is easy to the electromagnetic interferences such as resolution figure frequency, adjacent frequency, is of great significance to promoting high-speed railway operation security and operational efficiency.
Description
Technical field
The present invention relates to electromagnetic interference detection, Microwave photonics, high-speed railway (or abbreviation high ferro) technical fields, especially
Electromagnetic interference real-time detection apparatus along high ferro and method.
Background technology
Currently, high-speed railway is developed on an unprecedented scale in the whole world (especially in China), is runed by 2017 end of the year China
High ferro mileage reach 25000km.Due to the speed of service be 300km/h or more bullet train control, scheduling, pass through
It wirelessly communicates to send, therefore reliable vehicle-ground wireless communication is a vital ring for high-speed railway safe operation.Face
It is mainly the following system to the vehicle-ground wireless communication of high-speed railway.In China and Europe, current widely applied GSM-R systems
System (global system for mobile communication-railway, railway digital mobile communication system, distribution
Frequency range is uplink 885-889MHz and downlink 930-934MHz)；And including researching and developing and applying in the future
In the LTE-R systems (long term evolution-railway) of high ferro, millimeter-wave systems etc..
In the vehicle-ground wireless communication towards high-speed railway, (such as 880- of GSM-R systems in Uplink/Downlink frequency range
940MHz) it will appear in channel strip, adjacent frequency, unauthorized electromagnetic interference.In the case where electromagnetic interference and electromagnetism attack generation,
High ferro vehicle-ground wireless communication (such as GSM-R, LTE-R system) may multilated or destruction；And if train control system
Interfered, the train in running at high speed is forced reduction of speed or parking, cause delay, block, even more der Hammer thus occur.
Therefore, the electromagnetic interference monitoring of line of high-speed railway is very critical for enhancing operational safety and working efficiency.It is passing
On system, the interference monitoring mode of the mobile clear frequency of high ferro " empty window phase " has complicated, non real-time nature, seriously reduces work effect
Rate cannot monitor in real time, handle in real time.
Invention content
The distributed high ferro edge that it is an object of the present invention to provide a kind of systems to be easily integrated, at low cost, electromagnetism interference is strong
Line electromagnetic interference real-time monitoring device.
The object of the present invention is achieved like this：It is a kind of distribution high ferro along electromagnetic interference real-time monitoring device, the prison
Survey device include sequentially cascade photon radio-frequency acquisition front end, wavelength division multiplexer, optical fiber link, Wave decomposing multiplexer, photoswitch,
Focus on module；Wherein, photon radio-frequency acquires front end by sequentially cascade antenna, low noise amplifier and directly modulated lasers group
At；Module is focused on by photodetector, electric signal spectrum analyzer, high ferro vehicle-ground wireless communication signal demodulation module group
At the latter two carry out frequency domain to the output signal of photodetector simultaneously respectively and time-domain analysis is handled.
It is distributed that it is a further object of the present invention to provide a kind of systems to be easily integrated, at low cost, electromagnetism interference is strong
Electromagnetic interference method of real-time along high ferro, it is intended to the electromagnetic signal along distributed capture high ferro, at central station concentration
Reason, and photon auxiliary selenoid interference monitoring system is used, of low cost, strong antijamming capability monitors high ferro effectively in real time
Electromagnetic interference along the line.
What a further object of the present invention was realized in：The electromagnetic interference side of monitoring in real time along a kind of distributed high ferro
Method, specific monitoring step are as follows：Fixed point arrangement monitoring point forms distributed capture network first along high ferro, in each monitoring
Point installation photon radio-frequency acquires front end：Electromagnetic signal is acquired by antenna, directly modulated lasers are amplified into through low noise amplifier,
It is modulated onto different wave length (such as λ1..., λn, n is positive integer, indicates the sum of wavelength) light carrier on；Then, by different prisons
Modulated optical signal is transmitted to central station at a distance after wavelength division multiplexer is multiplexed by optical fiber link at measuring point, enters
It is transmitted to central station at a distance to optical fiber link.Then the optical signal after central station, reception is divided into not through Wave decomposing multiplexer
Same channel, all channels connection photoswitches realize time division multiplexing, different channels are detached in different time sections, are multiplexed into one
In channel, into centralized processing module：The optical signal beat frequency in channel is recovered into collected electromagnetism by photodetector
Signal, it is then, real based on spectrum analyzer and GSM-R demodulation modules to electromagnetic signal analysis time domain and frequency domain information after recovery
When monitoring high ferro along vehicle-ground wireless communication (such as GSM-R, LTE-R system) face electromagnetic interference situation, and distinguish interference type.
Compared with prior art, the invention has the characteristics that and advantage：
1) distributed capture, centralized processing pass through the fixed point monitoring point along high ferro, Monitor in time electromagnetic interference；
2) photon radio-frequency acquisition front end is loaded into after amplifying electromagnetic interference low noise on straight light modulation source, is drawn by optical fiber link
As far as central station processing.Fiber transmission link loss is small, and whole system is easily integrated, of low cost；
3) it is realized and is time-multiplexed using photoswitch pattern, it is only necessary to a set of centralized processing module in distal center station, so that it may with
Multiple spot monitors in real time, reduces cost.Meanwhile being detected simultaneously using time domain, frequency domain, it is easy to differentiate with electromagnetic interferences such as frequency, adjacent frequency.
Electromagnetic interference detection for line of high-speed railway, it is desirable to provide real-time and on-line mode, therefore, it should using close
The mode of end acquisition and centralized processing.The invention discloses electromagnetic interference method of real-time along a kind of distributed high ferro,
The mode of distributed capture and centralized processing is made full use of, monitors high ferro vehicle-ground wireless communication (such as GSM-R, LTE-R system in real time
System) electromagnetic interference that faces, and whole system is of low cost, is easily integrated.
Description of the drawings
The system block diagram of Fig. 1 the method for the present invention is (in Fig. 1：Wavelength division multiplexer 20 is same model with Wave decomposing multiplexer 40
Component, only interfacing order is different).
Fig. 2 photon radio-frequencies acquire front end.
Fig. 3 focus on module.
Fig. 4 different wave lengths channels implement time division multiplexing (TDM) demodulation by photoswitch.
Specific implementation mode
The implementation of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the detection device of the present invention includes photon radio-frequency acquisition front end 10, wavelength division multiplexer 20, optical fiber chain
Road 30, Wave decomposing multiplexer 40, photoswitch 50, centralized processing module 60.Wherein, photon radio-frequency acquisition front end (see Fig. 2) 10 is wrapped
Include antenna 101, low noise amplifier 102 and directly modulated lasers 103；Focus on module (see Fig. 3) include photodetector 601,
Electric signal spectrum analyzer 602 and high ferro vehicle-ground wireless communication (GSM-R, LTE-R system) signal demodulation module 603.
Electromagnetic interference real-time detection method along a kind of distributed high ferro of device as described in claim 1, specific steps
It is as follows：First along high ferro distributed arrangement monitoring point and install photon radio-frequency acquisition front end；Electromagnetic signal is acquired by antenna,
It is amplified into directly modulated lasers through low noise amplifier；Secondly, the electromagnetic signal of acquisition is modulated onto the light load of different wave length
On wave；Then, modulated optical signal at different monitoring points is remote by optical fiber link after wavelength division multiplexer is multiplexed
It is transmitted to central station；Then, optical signal is divided into different channels by different wave length through Wave decomposing multiplexer, and real using photoswitch
It is now time-multiplexed, different channels is detached and enter centralized processing module in different time sections；Using photodetector by day part
Optical signal conversion revert to electromagnetic signal, be based on electric signal spectrum analyzer and high ferro vehicle-ground wireless communication signal demodulation module
Centralization carries out time and frequency domain analysis to the electromagnetic signal of recovery, monitors electromagnetic interference situation along high ferro in real time, and distinguish
Interference type.Distributed capture and centralized processing are combined：Electromagnetic interference passes through optical fiber chain after each monitoring point remote collection
It zooms out to central station and focuses in road.The monitoring point of distributed arrangement is multiple along high ferro, the light of multiple monitoring point installations
Sub- RF acquisition front end uses different wave length, and connects and be multiplexed using wavelength division multiplexer, carries out real-time distributed multiple spot monitoring.
It is realized and is time-multiplexed using photoswitch pattern, concentrate the electromagnetism for analyzing multiple monitoring point acquisitions to believe using a set of centralized processing module
Breath.High ferro vehicle-ground wireless communication system includes GSM-R systems and LTE-R systems.
First, the fixed point arrangement monitoring point along high ferro, installation photon radio-frequency acquire front end 10：Electricity is acquired by antenna 101
Magnetic signal is amplified into directly modulated lasers 103 through low noise amplifier 102, is modulated onto different wave length (such as λ1..., λn)
On light carrier；Then, it is connected using wavelength division multiplexer 20 and is multiplexed the light carrier at different monitoring points, the multiple prisons of distributed capture
The electromagnetic signal of measuring point, multiplexed optical signal enter optical fiber link 30 and are transmitted to central station at a distance.
Optical signal after central station, reception is divided into different channels through Wave decomposing multiplexer 40, as shown in figure 4, all
Channel connects photoswitch 50 and realizes time division multiplexing, and different channels are detached in different time sections, are multiplexed into a channel, then
Using a set of centralized processing module 60 to multiple monitoring point centralized processings along high ferro.In focusing on module 60, lead to
It crosses photodetector 601 and the optical signal beat frequency in channel is recovered into collected electromagnetic signal, then, be based on electric signal frequency spectrum
Analyzer 602 and high ferro vehicle-ground wireless communication (such as GSM-R, LTE-R system) demodulation module 603 analyze electromagnetic signal after recovery
Time domain and frequency domain information.By taking GSM-R, LTE-R system as an example：The spectrum information and power of wireless signal can be obtained on frequency domain
Peak value, and each peak value can identify that (CGI) is identified by Cell Global Identification；In gsm system, CGI is by mobile national
Number (MCC), mobile network No. (MNC), Location Area Code (LAC), cell identification code (CI) composition；In LTE-R systems, CGI is by moving
National number (MCC), mobile network No. (MNC), eNodeB identification codes (ENODEB_ID), cell identification code (CI) composition.Use high ferro
Vehicle-ground wireless communication signal demodulation module 603 can identify each legal band information.If a frequency band cannot be identified
Legal CGI codes, it will be noted as suspicious adjacent frequency or out-of-band interference.Meanwhile the electromagnetism of high ferro vehicle-ground wireless communication is dry
Disturbing can also be monitored from time domain：In conjunction with electric signal spectrum analyzer 602 and high ferro vehicle-ground wireless communication signal solution mode transfer
Block 603 can obtain the planisphere and eye pattern of signal in GSM-R systems and LTE-R systems；According to the quality of eye pattern, planisphere,
It can effective Observational frequency band noise and electromagnetic interference.The electromagnetic interference detection process and step and GSM-R systems of LTE-R systems are complete
Unanimously, only the frequency range residing for signal and modulation classification are different.
With the photon radio-frequency acquisition front end based on straight light modulation source multiple monitoring points are arranged in line of high-speed railway；Acquire electromagnetism
It is modulated on the light carrier of different wave length after signal and amplification, in being transmitted to by optical fiber link in conjunction with wavelength division multiplexer pattern
Center station, wavelength-division are multiplexed into different channels through wavelength division multiplexer, are realized and are time-multiplexed by photoswitch, each channel is in different time-gap
It is input to centralized processing module and carries out time domain, frequency-domain analysis and information extraction, realize electromagnetic interference monitoring and classification along high ferro.
Set forth above is only the preferred embodiment of the present invention, it is noted that do not depart from the method for the present invention and
Under the premise of core apparatus essence, several changes can be made in actual implementation and polishing should also be included in the protection of the present invention
Within range.
Claims (7)
1. electromagnetic interference real-time monitoring device along a kind of distribution high ferro, characterized in that the monitoring device includes sequentially cascading
Photon radio-frequency acquire front end（10）, wavelength division multiplexer（20）, optical fiber link（30）, Wave decomposing multiplexer（40）, photoswitch
（50）, centralized processing module（60）；Wherein, photon radio-frequency acquires front end by sequentially cascade antenna（101）, low noise amplifier
（102）And directly modulated lasers（103）Composition；Module is focused on by photodetector（601）, electric signal spectrum analyzer
（602）, high ferro vehicle-ground wireless communication signal demodulation module（603）Composition, electric signal spectrum analyzer（602）With high iron car nothing
Line signal of communication demodulation module（603）Respectively to photodetector（601）Output signal carry out frequency domain and time-domain analysis processing.
2. electromagnetic interference method of real-time along a kind of distributed high ferro of device as described in claim 1, characterized in that tool
Steps are as follows for body：First along high ferro distributed arrangement monitoring point and install photon radio-frequency acquisition front end；Electricity is acquired by antenna
Magnetic signal is amplified into directly modulated lasers through low noise amplifier；Secondly, the electromagnetic signal of acquisition is modulated onto different wave length
Light carrier on；Then, modulated optical signal at different monitoring points is passed through into optical fiber link after wavelength division multiplexer is multiplexed
It is transmitted to central station at a distance；Then, optical signal is divided into different channels by different wave length through Wave decomposing multiplexer, and uses light
Switch realizes time division multiplexing, and different channels are detached and enter centralized processing module in different time sections；It will using photodetector
The optical signal conversion of day part reverts to electromagnetic signal, is based on electric signal spectrum analyzer and high ferro vehicle-ground wireless communication signal solution
Mode transfer block is concentrated carries out time and frequency domain analysis to the electromagnetic signal of recovery, monitors electromagnetic interference situation along high ferro in real time, and
Distinguish interference type.
3. electromagnetic interference method of real-time along a kind of distributed high ferro according to claim 2, it is characterised in that：Point
Cloth acquires and centralized processing is combined：Electromagnetic interference is zoomed out by optical fiber link into after each monitoring point remote collection
Center station focuses on.
4. electromagnetic interference method of real-time along a kind of distributed high ferro according to claim 2, it is characterised in that：Institute
The monitoring point for stating the distributed arrangement along high ferro is multiple, and the photon radio-frequency acquisition front end of multiple monitoring point installations is using different
Wavelength, and connect and be multiplexed using wavelength division multiplexer, carry out real-time distributed multiple spot monitoring.
5. electromagnetic interference method of real-time along a kind of distributed high ferro according to claim 2, it is characterised in that：It adopts
It is realized and is time-multiplexed with light switching mode, concentrate the electromagnetism for analyzing multiple monitoring point acquisitions to believe using a set of centralized processing module
Breath.
6. electromagnetic interference method of real-time along a kind of distributed high ferro according to claim 2, it is characterised in that：Institute
State high ferro vehicle-ground wireless communication include global system for mobile communications-railway systems and
Long term evolution-railway systems.
7. electromagnetic interference method of real-time along a kind of distributed high ferro according to claim 2, it is characterised in that：Institute
It states in high ferro vehicle-ground wireless communication system, spectrum analyzer（602）With high ferro vehicle-ground wireless communication signal demodulation module（603）It is right
By photodetector（601）Electromagnetic signal after recovery obtains the spectrum information and power peak of the wireless signal on frequency domain
Value, and each peak value is identified by Cell Global Identification；global system for mobile
In communications-railway systems, Cell Global Identification by mobile national number, mobile network No., Location Area Code,
Cell identification code forms；In long term evolution-railway systems, Cell Global Identification is by mobile national
Number, mobile network No., eNodeB identification codes, cell identification code composition；Use high ferro vehicle-ground wireless communication signal demodulation module（603）
It can identify each legal band information；If a frequency band cannot be identified legal Cell Global Identification, it will
It is noted as suspicious adjacent frequency or out-of-band interference；Meanwhile the electromagnetic interference of high ferro vehicle-ground wireless communication can also be enterprising from time domain
Row monitoring：In conjunction with electric signal spectrum analyzer（602）With high ferro vehicle-ground wireless communication signal demodulation module（603）, obtain
Global system for mobile communications-railway systems and long term evolution-
The planisphere and eye pattern of signal in railway systems；It, can effective Observational frequency band noise and electricity according to the quality of eye pattern, planisphere
Magnetic disturbance.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161289.3A CN108490271B (en) | 2018-02-27 | 2018-02-27 | Distributed real-time monitoring device and method for electromagnetic interference along high-speed rail |
| PCT/CN2018/077710 WO2019165618A1 (en) | 2018-02-27 | 2018-03-01 | Distributed device for monitoring electromagnetic interference along high-speed rail in real time and related method |
| JP2020542246A JP6975492B2 (en) | 2018-02-27 | 2018-03-01 | Distributed real-time monitoring device for electromagnetic interference along high-speed railways and its method |
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| CN201810161289.3A CN108490271B (en) | 2018-02-27 | 2018-02-27 | Distributed real-time monitoring device and method for electromagnetic interference along high-speed rail |
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| CN108490271B CN108490271B (en) | 2020-06-19 |
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| CN (1) | CN108490271B (en) |
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| CN109861771A (en) * | 2019-03-22 | 2019-06-07 | 上海控创信息技术股份有限公司 | Rail traffic LTE wireless communication system adjacent-channel interference power device and test method |
| CN109861771B (en) * | 2019-03-22 | 2022-01-14 | 上海控创信息技术股份有限公司 | Adjacent channel interference power device and testing method for rail transit LTE wireless communication system |
| CN111650502A (en) * | 2020-03-04 | 2020-09-11 | 苏州热工研究院有限公司 | Method for evaluating aging state of relay based on electromagnetic signal |
| CN113131970A (en) * | 2021-05-19 | 2021-07-16 | 西南交通大学 | High-iron electromagnetic interference avoidance system based on reinforcement learning and radio over fiber technology |
| CN113671264A (en) * | 2021-07-01 | 2021-11-19 | 博微太赫兹信息科技有限公司 | Switch type multi-channel radiometer |
| CN116311861A (en) * | 2023-03-02 | 2023-06-23 | 讯芸电子科技(中山)有限公司 | Equipment remote control method based on photoelectron module |
| CN116311861B (en) * | 2023-03-02 | 2024-02-13 | 讯芸电子科技(中山)有限公司 | Equipment remote control method based on photoelectron module |
| CN116500553A (en) * | 2023-06-07 | 2023-07-28 | 北京交通大学 | Radar mutual interference suppression method, radar mutual interference suppression device, computer equipment and storage medium |
| CN116500553B (en) * | 2023-06-07 | 2023-10-03 | 北京交通大学 | Radar mutual interference suppression method, radar mutual interference suppression device, computer equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019165618A1 (en) | 2019-09-06 |
| JP6975492B2 (en) | 2021-12-01 |
| CN108490271B (en) | 2020-06-19 |
| JP2021513064A (en) | 2021-05-20 |
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Application publication date: 20180904 Assignee: Chengdu guanghuitong Technology Co., Ltd Assignor: SOUTHWEST JIAOTONG University Contract record no.: X2020980005985 Denomination of invention: A distributed real-time monitoring device and method for electromagnetic interference along high-speed railway Granted publication date: 20200619 License type: Common License Record date: 20200911 |