CN110285762A - Contact net dynamic characteristic real-time monitoring system - Google Patents
Contact net dynamic characteristic real-time monitoring system Download PDFInfo
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- CN110285762A CN110285762A CN201910610503.3A CN201910610503A CN110285762A CN 110285762 A CN110285762 A CN 110285762A CN 201910610503 A CN201910610503 A CN 201910610503A CN 110285762 A CN110285762 A CN 110285762A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Contact net dynamic characteristic real-time monitoring system, using existing laser measuring device for measuring as detection device, laser measuring device for measuring, which is mounted on, to be needed to monitor near contact net on support frame, further includes data collection unit, data analytical calculation unit, threshold values storage unit, data alarm unit, data transmission unit, dynamic data real-time display unit in power-feed section PC machine.The present invention is vertical using laser measuring device for measuring the real time measure contact line, horizontal-shift dynamic data, data are after each unit processing in PC machine, by being compared with deposit threshold number evidence in PC machine, the dynamic characteristic of contact line can be judged in time, judge whether contact net meets driving and require, or which kind of speed of service requirement met, to be train, EMU train control system control train operation state provides foundation, it and is maintenance gang for catenary, power-feed section monitors the contact Running State of particular section in real time under specific meteorological condition, provide visual data, it ensure that electric railway normal operation.
Description
Technical field
The present invention relates to electric railway technical field, especially a kind of contact net dynamic characteristic real-time monitoring system.
Background technique
Electrified contacting nets are the power supply lines of downline road arrangement, provide operation for electric locomotive, EMU
Electric power.It is needed by mounting means and locomotive operation, no back-up system, therefore safety, the reliability of system operation,
It has been directly related to the safety and reliability of train, motor-car operation.
Due to contact net system be downline road laying, influenced by ambient environmental factors it is very huge, as wind,
Influence such as rain, snow, thunder and lightning, earthquake etc., once breaking down, will directly influence traffic safety since the system does not have redundancy.
In actual motion, the contact line of pantograph and contact net on train, EMU is in sliding, dynamic Contact obtaining current state,
Therefore, the dynamic characteristic of contact net system, directly affect locomotive pantograph obtain electric current quality, and influenced train,
The speed of service etc. of EMU.In the natural environment, influence of the wind to contact net is most directly most huge, wind-induced greatly to connect
Line offset, vibration are touched, contact net dynamic characteristic is deteriorated, will lead to pantograph and stream is taken to be affected, in turn result in train, EMU
It is short of power, the speed of service declines, and train can be directly resulted under extreme case, the tripping of EMU main circuit breaker, is stopped transport；Therefore,
The operating status of real-time monitoring Special zone (such as air port, high bridge, river valley, be by the wind affected location) contact net, determines whether
Be able to satisfy service requirement, provide real-time control data for train, EMU operation, be ensure train, EMU it is safe and reliable,
The necessary means run on time.
In the prior art, image acquisition technology is generally adopted by for the real-time monitoring of contact net, when work, image is adopted
Collect equipment and continuous prison bat is carried out to monitoring point contact net, the contact line then through contact net in related system contrast images swings position
It moves, is more than certain numerical value range for being displaced, just alarms administrative department, and then administrative department carries out prediction scheme in advance
(for example notice is by the locomotive deceleration etc. in this section), or power-feed section repair and maintenance personnel is arranged to repair.But existing figure
As detection has the following problems: big by such environmental effects, the equipment can not be normal under the special weathers state such as rain, mist, snow
Work；Night and the poor environment of illumination need to carry out light filling, need to add powerful lighting device, equipment and O&M cost meeting
Increase；The measure of precision for acquiring data will receive image pixel influence, and pixel is bigger, and the image of acquisition is more clear, data precision
It is better, but the transmission quantity of data greatly improves simultaneously, needs matched transmission channel to require bigger, will affect number in this way
According to transmission speed；And it is occupied in the image of acquisition comprising a large amount of useless information (such as the ambient enviroment image obtained)
Transfer resource increases burden for later data analysis, extraction, and real-time is poor.
Summary of the invention
In order to overcome existing use image acquisition technology to drawback present in contact net monitoring, the present invention provides uses
Vertical, the horizontal-shift dynamic data of existing laser measuring device for measuring the real time measure selected location contact line, data are each in PC machine
After applying unit processing, continuous, horizontal in real time, vertical vibration curve is formed, real-time contact line dynamic characteristic is reacted；Root
According to the real-time curve, different threshold values is set, judges the real-time running state of contact net, and whether meets driving and requires,
Or which kind of speed of service requirement met, so that controlling train operation state for train, EMU train control system provides foundation；It should
Real-time curve, can be transmitted to maintenance gang for catenary, power-feed section, and the contact net in monitoring location can be observed in real time in operation management personnel
Operating status monitors the contact Running State of particular section in real time especially under specific meteorological condition, ensure that electrification
The contact net dynamic characteristic real-time monitoring system of railway normal operation.
The technical solution adopted by the present invention to solve the technical problems is:
Contact net dynamic characteristic real-time monitoring system, using existing laser measuring device for measuring as detection device, laser measuring device for measuring
Vertical, the horizontal-shift dynamic data of energy the real time measure selected location contact line, it is characterised in that laser measuring device for measuring is mounted on
It needs to monitor near contact net on support frame, head-up alignment needs the contact line monitored for the detection of laser measuring device for measuring, existing
Field device is made of laser measuring device for measuring, power supply, control system, Transmission system, further includes the tidal data recovering in power-feed section PC machine
Unit, data analytical calculation unit, threshold values storage unit, data alarm unit, data transmission unit and dynamic data are real-time
Display unit, the contact line data of the contact net of laser measuring device for measuring real-time monitoring be transferred in PC machine each related application unit into
Row processing, transmission mode can be communicated using one of wired, wireless mode with PC machine, and wired mode can be logical using optical fiber
News and power grid mouth, wireless mode can be used Internet of Things and send data to cloud, then carry out data processing by the PC machine of power-feed section；
The data that laser measuring device for measuring uploads form horizontal, vertical vibration curve after applying unit each in PC machine processing；According to the reality
When curve, different threshold values is set, judges the real-time running state of contact net, and whether meet driving require, and meet
Which kind of speed of service requirement, so that controlling train operation state for train, EMU train control system provides foundation；The real-time song
Line, can be transmitted to maintenance gang for catenary, power-feed section, and the contact net operation shape in monitoring location can be observed in real time in operation management personnel
State monitors the contact Running State of particular section in real time under specific meteorological condition.
The control of the laser measuring device for measuring uses two ways, the first: according to the wind speed of on-site measurement, wind speed size
When reaching preset value, the automatic measurement for starting laser measuring device for measuring, transmission data function；Second: terminal artificially controls starting
The measurement of laser measuring device for measuring, transmission data function.
Monitoring field is received by wireless and wired mode in the data collection unit application and is collected into monitoring data, is deposited
Enter primary data cache library.
Data are obtained from primary data cache library in the data analytical calculation unit application, data are parsed,
The waveform diagram of drawing data, it is the data of Y-axis perpendicular to ground, and by Wave data that generating contact line and being parallel to ground, which is X-axis,
Storage, data analytical calculation unit can also be by the position datas of laser measuring device for measuring real-time measurement contact line, measurement interval wind frequency
Rate data, contact net vibration frequency data compare, and calculate in measurement period contact line horizontal, upright position
Variable quantity, and one group of time is generated as X-axis, horizontal, vertical offset is respectively the contact line time shifting data of Y-axis.
The threshold values storage unit stores contact line and is parallel to ground X-axis, special perpendicular to the contact net dynamic of ground Y-axis
Sign judges data.
The setting data of calling threshold value storage unit and data analytical calculation unit are deposited in the data alarm unit application
The Wave data of storage compares and analyzes, and data amplitude occurs more than after threshold range, according to different threshold values is surmounted, generation is mentioned
Show, early warning, the different warning messages such as alarm, warning message is stored into data alarm unit.
The data alarm unit warning message that storage is called in data transmission unit application, according to warning message etc.
Grade pushes to power-feed section repair and maintenance personnel using short message and APP application mode by designated lane or wireless mode, driving is adjusted
Degree personnel and relevant departments supervisor.
The time shifting data that storage is called in the dynamic data real-time display unit application are shown dynamic in real time in terminal
State waveform.
The medicine have the advantages that when the invention works, being connect using existing laser measuring device for measuring the real time measure selected location
The contact line of net-fault is vertical, horizontal-shift dynamic data, and data are after data collection unit processing in PC machine, data analytical calculation
Unit generates m- displacement data, data display unit allocating time when horizontal one group of continuous contact line, vertical vibration and is displaced number
Contact net vibrational waveform is shown according in terminal, the setting data and data of calling threshold value storage unit in data alarm unit application
The Wave data of analytical calculation unit storage compares and analyzes, after occurring more than threshold range, generation warning message, and according to
Threshold value beyond different magnitudes judges the degree that contact line dynamic characteristic deteriorates, and issues prompt, early warning, warning information, alarm signal
Breath is stored into warning message unit, and then, data transmission unit is sent to relevant information the mechanism for needing the information, personnel,
And then administrative department can carry out prediction scheme (for example notice will be by the locomotive deceleration etc. in this section) in advance, or arrange power-feed section inspection
It repairs maintenance personnel to repair, so that controlling train operation state for train, EMU train control system provides foundation, and to connect
Net-fault work area, power-feed section monitor the contact Running State of particular section in real time under specific meteorological condition, provide intuitive number
According to ensure that electric railway normal operation.Administrative staff of the present invention can according to need starts certain monitoring site in real time, observation
The real-time status of contact net manages highly efficient.The laser for the laser measuring device for measuring transmitting that the present invention applies belongs to nanoscale and swashs
Light wave has the characteristics that high directivity, high monochromaticity, high brightness, has stronger penetrability, can overcome the rings such as rain, mist, snow
The influence of border factor；Additional illumination equipment is not needed；Data volume is small, and transmission requirement is not high.To contact net in present invention application
Operating status is prejudged, and accident is contained in budding state, has been ensured the safe operation of train, EMU, has been avoided
The generation of the major accidents such as parking, catenary cut off.Based on above-mentioned, so the application prospect that the present invention has had.
Detailed description of the invention
Fig. 1 is the structural schematic diagram between invention laser measuring device for measuring and contact net.
Fig. 2 is process flow diagram of the present invention.
Fig. 3 is block architecture diagram of the present invention.
Specific embodiment
Shown in Fig. 1,2,3, contact net dynamic characteristic real-time monitoring system, using existing laser measuring device for measuring 1 as inspection
Measurement equipment, vertical, the horizontal-shift dynamic data of 1 energy the real time measure selected location contact line 3 of laser measuring device for measuring, laser measurement
Device, which is mounted on, to be needed to monitor near contact net on support frame 2, and the detection of laser measuring device for measuring, which is head-up aligned, to be needed to monitor
Contact line, it further includes in power-feed section PC machine that field device is made of laser measuring device for measuring, power supply, control system, Transmission system
Data collection unit, data analytical calculation unit, threshold values storage unit, data alarm unit, data transmission unit and dynamic
State data real-time display unit (computer processing technology of existing maturation), the contact net of laser measuring device for measuring real-time monitoring connects
Touching line number evidence is transferred to each related application unit in PC machine and is handled, and transmission mode can be using in wired, wireless mode
One kind is communicated with PC machine, and wired mode can be can be used Internet of Things and be passed data using optical-fibre communications and power grid mouth, wireless mode
Cloud is transported to, then data processing is carried out by the PC machine of power-feed section；The data that laser measuring device for measuring uploads are in PC machine respectively using single
After member processing, horizontal, vertical vibration curve is formed；According to the real-time curve, different threshold values is set, judges the reality of contact net
When operating status, and whether meet driving and require, and meet the requirement of which kind of speed of service, thus for train, EMU column control
System control train operation state provides foundation；The real-time curve can be transmitted to maintenance gang for catenary, power-feed section, O&M pipe
The contact Running State in monitoring location can be observed in real time in reason personnel, monitors particular section in real time under specific meteorological condition
Contact Running State.11 be laser measuring device for measuring data transmission set.
Shown in Fig. 1,2,3, the control of laser measuring device for measuring uses two ways, the first: according to the wind of on-site measurement
Speed, when wind speed size reaches preset value, the automatic measurement for starting laser measuring device for measuring, transmission data function；Second: terminal people
Measurement, transmission data function for control starting laser measuring device for measuring.Pass through wireless and wired side in data collection unit application
Formula receives monitoring field and is collected into monitoring data, is stored in primary data cache library.From original in data analytical calculation unit application
Data buffer storage obtains data in library, and data are parsed, the waveform diagram of drawing data, and generating contact line and being parallel to ground is X
Axis, is the data of Y-axis perpendicular to ground, and Wave data is stored, and data analytical calculation unit can also be by laser measuring device for measuring
Position data, measurement interval wind frequency data, the contact net vibration frequency data of real-time measurement contact line compare, and calculate
Contact line is in horizontal, upright position variable quantity in one measurement period, and one group of time of generation is X-axis, horizontal, vertical shift
Amount is respectively the contact line time shifting data of Y-axis.Threshold values storage unit stores contact line and is parallel to ground X-axis, perpendicular to
The contact net behavioral characteristics of ground Y-axis judge data.The setting data of calling threshold value storage unit in data alarm unit application
It is compared and analyzed with the Wave data of data analytical calculation unit storage, data amplitude occur is more than foundation after threshold range
Surmount different threshold values, generate the different warning messages such as prompt, early warning, alarm, warning message is stored into data alarm unit.Number
According to transmission unit apply in call the data alarm unit warning message of storage, according to the grade of warning message, by dedicated logical
Road or wireless mode use short message and APP application mode to push to power-feed section repair and maintenance personnel, vehicle scheduling personnel and phase
Close department manager.The time shifting data that storage is called in dynamic data real-time display unit application are shown dynamic in real time in terminal
State waveform.
Shown in Fig. 1, the laser measuring device for measuring that the present invention uses, working principle is as follows: laser measuring device for measuring is swashed by it
Optical transmitting set will be seen that red laser directive testee surface (contact line of contact net) through camera lens, the laser reflected through object
It is received by laser measuring device for measuring receiver camera lens, and then is received by the CCD linear camera inside laser measuring device for measuring, according to not
Same distance, CCD linear camera " can see " this luminous point under a different angle, according to this angle and known laser
The distance between camera, digital signal processor can calculate sensor and testee (contact in laser measuring device for measuring
The distance between the contact line of net), meanwhile, light beam passes through analog- and digital- electricity in laser measuring device for measuring in the position of receiving element
Road processing, and by microprocessor analysis in laser measuring device for measuring, corresponding output valve is calculated, and in simulation set by user
Calculate that corresponding contact line is vertical, horizontal-shift dynamic data in amount window, and outputting standard contact line is vertical in proportion, water
Flat offset dynamic data signal；It is linear to be monitored measurement, highest with triangulation for the laser measuring device for measuring that the present invention uses
It spends up to 1um, resolution ratio is even more that can reach the level of 0.1um；The laser measuring device for measuring that the present invention uses, it can achieve
0.01% high-resolution, 0.1% high linearity, 6.08KHz high response adapt to adverse circumstances.It illustrates in contact net concrete application:
It is X-axis that contact line, which is parallel to ground, is Y-axis perpendicular to ground, if the slide plate length of OCS and pantograph is 1950mm, slide plate
Length 1576mm, when contact line is in middle, the slide plate length of pantograph is 1576/2=788mm, and pantograph upper slide is effective
Range is 1030mm, when contact line of the contact line on middle, the slide plate of pantograph or so swingable effective length is
1030/2=515mm, therefore the actual design requirement of contact net, the amplitude of contact net lines horizontal hunting cannot be greater than 515mm, no
It will cause pantographs to disengage net, causes arcing, and train is caused to take electric problem, and contact net swings amplitude greater than by electricity
It may cause pantograph de- bow when bending half-breadth and scrape the major accidents such as net, equally, contact line, which swings up and down amplitude, to be greater than
Otherwise 250mm can cause contact line to be waved, cause arcing and train safety accident.
Shown in Fig. 1,2,3, when the invention works, using existing laser measuring device for measuring the real time measure selected location contact net
Contact line is vertical, horizontal-shift dynamic data, data are after data collection unit processing in PC machine, data analytical calculation unit
M- displacement data, data display unit allocating time displacement data when horizontal one group of continuous contact line, vertical vibration is generated to exist
Terminal shows contact net vibrational waveform, the setting data and data analysis of calling threshold value storage unit in data alarm unit application
The Wave data of computing unit storage compares and analyzes, and after occurring more than threshold range, generates warning message, and according to exceeding
The threshold value of different magnitudes judges the degree that contact line dynamic characteristic deteriorates, and issues prompt, early warning, warning information, and warning message is deposited
It stores up into warning message unit, then, data transmission unit is sent to relevant information the mechanism for needing the information, personnel, in turn
Administrative department can carry out prediction scheme (for example notice will be by the locomotive deceleration etc. in this section) in advance, or arrange power-feed section maintenance dimension
Shield personnel repair, so that controlling train operation state for train, EMU train control system provides foundation, and are contact net
Work area, power-feed section monitor the contact Running State of particular section in real time under specific meteorological condition, provide visual data, protect
Electric railway normal operation is demonstrate,proved.Administrative staff of the present invention can according to need starts certain monitoring site in real time, observation contact
The real-time status of net manages highly efficient.The laser for the laser measuring device for measuring transmitting that the present invention applies belongs to nanoscale laser wave,
Have the characteristics that high directivity, high monochromaticity, high brightness, have stronger penetrability, can overcome the environment such as rain, mist, snow because
The influence of element；Additional illumination equipment is not needed；Data volume is small, and transmission requirement is not high.Operation in present invention application to contact net
State is prejudged, and accident is contained in budding state, has ensured the safe operation of train, EMU, avoid parking,
The generation of the major accidents such as catenary cut off.Based on above-mentioned, so the application prospect that the present invention has had.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. contact net dynamic characteristic real-time monitoring system, using existing laser measuring device for measuring as detection device, laser measurement dress
Set vertical, the horizontal-shift dynamic data of energy the real time measure selected location contact line, it is characterised in that laser measuring device for measuring installation
It needing to monitor near contact net on support frame, head-up alignment needs the contact line monitored for the detection of laser measuring device for measuring,
Field device is made of laser measuring device for measuring, power supply, control system, Transmission system, further includes the data remittance in power-feed section PC machine
Collect unit, data analytical calculation unit, threshold values storage unit, data alarm unit, data transmission unit and dynamic number factually
When display unit, the contact line data of the contact net of laser measuring device for measuring real-time monitoring are transferred to each related application unit in PC machine
It is handled, transmission mode can be communicated using one of wired, wireless mode with PC machine, and wired mode can use optical fiber
Communication and power grid mouth, wireless mode can be used Internet of Things and send data to cloud, then carry out data by the PC machine of power-feed section
Reason；The data that laser measuring device for measuring uploads form horizontal, vertical vibration curve after applying unit each in PC machine processing；According to
Different threshold values is arranged in the real-time curve, judges the real-time running state of contact net, and whether meets driving and require, and
Which kind of speed of service requirement met, so that controlling train operation state for train, EMU train control system provides foundation；The reality
When curve, maintenance gang for catenary, power-feed section can be transmitted to, the contact net fortune in monitoring location can be observed in real time in operation management personnel
Row state monitors the contact Running State of particular section in real time under specific meteorological condition.
2. contact net dynamic characteristic real-time monitoring system according to claim 1, which is characterized in that laser measurement is utilized
The characteristic of device realizes that real-time online dynamic measures, and the control of laser measuring device for measuring uses two ways, the first: according to existing
The wind speed of field recognition, when wind speed size reaches preset value, the automatic measurement for starting laser measuring device for measuring, transmission data function；The
Two kinds: terminal artificially controls the measurement of starting laser measuring device for measuring, transmission data function.
3. contact net dynamic characteristic real-time monitoring system according to claim 1, which is characterized in that data collection unit is answered
Monitoring field is received by wireless and wired mode in and is collected into monitoring data, and is stored in its primary data cache library.
4. contact net dynamic characteristic real-time monitoring system according to claim 3, which is characterized in that data analytical calculation list
Data are obtained from primary data cache library in member application, data are parsed, the waveform diagram of drawing data, contact line is generated
Being parallel to ground is X-axis, perpendicular to ground is the data of Y-axis, and Wave data is stored, and data analytical calculation unit can also incite somebody to action
Position data, measurement interval wind frequency data, the contact net vibration frequency data of laser measuring device for measuring real-time measurement contact line are done
Comparison calculates in measurement period contact line in horizontal, upright position variable quantity, and generating one group of time is X-axis,
Horizontal, vertical offset is respectively the contact line time shifting data of Y-axis.
5. contact net dynamic characteristic real-time monitoring system according to claim 1, which is characterized in that the storage of threshold values storage unit
There is contact line and is parallel to ground X-axis, judges data perpendicular to the contact net behavioral characteristics of ground Y-axis.
6. contact net dynamic characteristic real-time monitoring system described in claim 1, which is characterized in that dynamic data real-time display list
First when m- displacement data generated that calculates as needed can generate Real-time Motion Image in correlation unit terminal.
7. contact net dynamic characteristic real-time monitoring system according to claim 5, which is characterized in that data alarm unit is answered
It is compared and analyzed with the Wave data that the setting data of middle calling threshold value storage unit and data analytical calculation unit store, out
It is now more than to generate warning message, warning message is stored into data alarm unit after threshold range.
8. contact net dynamic characteristic real-time monitoring system according to claim 7, which is characterized in that data transmission unit is answered
With the middle data alarm unit warning message for calling storage, short message and the application side APP are used by designated lane or wireless mode
Formula pushes to Traffic dispatching system, power-feed section and related personnel.
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| CN111609917A (en) * | 2020-05-22 | 2020-09-01 | 成都唐源电气股份有限公司 | Contact net vibration measurement method and system based on linear array camera |
| CN112710241A (en) * | 2020-12-17 | 2021-04-27 | 中铁电气化局集团有限公司 | Method and device for detecting cantilever offset |
| CN112729126A (en) * | 2020-12-30 | 2021-04-30 | 重庆瑞莱尔博自动化设备有限公司 | Contact line abrasion wireless measuring instrument and method based on laser vision |
| CN113320445A (en) * | 2020-02-28 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Online monitoring and intelligent hidden danger and fault distinguishing and early warning system for contact network |
| CN113415212A (en) * | 2021-08-11 | 2021-09-21 | 中铁二院工程集团有限责任公司 | Continuous seamless rigid contact suspension network system for rail transit and installation method thereof |
| CN116337154A (en) * | 2023-03-27 | 2023-06-27 | 成都铁路科创有限责任公司 | Contact net health state monitoring method and system |
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