CN205749778U - A kind of electric railway flashover current data collecting system - Google Patents
A kind of electric railway flashover current data collecting system Download PDFInfo
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- CN205749778U CN205749778U CN201620428493.3U CN201620428493U CN205749778U CN 205749778 U CN205749778 U CN 205749778U CN 201620428493 U CN201620428493 U CN 201620428493U CN 205749778 U CN205749778 U CN 205749778U
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Abstract
The utility model discloses a kind of electric railway flashover current data collecting system, belong to data collecting system technical field.It includes electric railway arcing fault localizer, repeater, server, terminal unit, multiple electric railway arcing fault localizers include signal gathering unit, signal processing unit, communication interface, terminal unit, electric railway arcing fault localizer will by analysis by communication interface, the flashover current signal processed is sent to repeater, repeater further will by analysis by communication line, the flashover current signal processed is sent to server, pass through terminal unit, can check on uploading onto the server by analysis, the flashover current signal processed.It applies electric railway flashover current data pick-up, it is possible to realizes remote collection electric railway flashover current data, thus saves human resources.
Description
Technical field
This utility model relates to data collecting system technical field, particularly relates to a kind of electric railway flashover current data collecting system.
Background technology
Flashover refers to when the gas around solid insulator or liquid dielectric are breakdown, along the phenomenon of solid insulator surface-discharge.Voltage during its electric discharge is referred to as flashover voltage.After there is flashover, interelectrode voltage quickly falls to zero or close to zero.Spark or electric arc in flashover passage make insulating surface hot-spot cause carbonization, damage surface insulation.
Utility model content
In view of this, this utility model provides a kind of electric railway flashover current data collecting system, and it applies electric railway flashover current data pick-up, it is possible to realize remote collection electric railway flashover current data, thus more suitable for practicality.
In order to achieve the above object, the technical scheme of the electric railway flashover data collecting system that this utility model provides is as follows:
The electric railway flashover current data collecting system that the present invention provides includes electric railway arcing fault localizer, repeater, server, terminal unit,
Described electric railway arcing fault localizer includes signal gathering unit, signal processing unit, communication interface, terminal unit,
Described signal gathering unit is used for gathering the flashover current signal that electric railway is along the line,
Described signal processing unit is used for described flashover current signal is analyzed, is processed,
Wherein, described signal gathering unit is the Luo-coil of band magnetic core, a winding of described Luo-coil and turn ratio >=1.5 × 10 of Secondary Winding6: 1, described magnetic core is the electric wire of electric railway；
Described electric railway arcing fault localizer by described communication interface by by analysis, process flashover current signal be sent to described repeater, described repeater further by communication line by described by analysis, process flashover current signal be sent to described server, by described terminal unit, it is possible to check be uploaded on described server by analysis, process flashover current signal.
The electric railway flashover data collecting system that this utility model provides also can be applied to the following technical measures to achieve further.
The electric railway flashover current data collecting system that the present invention provides includes electric railway arcing fault localizer, repeater, server, terminal unit,
Described electric railway arcing fault localizer includes signal gathering unit, signal processing unit, communication interface, terminal unit,
Described signal gathering unit is used for gathering the flashover current signal that electric railway is along the line,
Described signal processing unit is used for described flashover current signal is analyzed, is processed,
Wherein, described signal gathering unit is the Luo-coil of band magnetic core, a winding of described Luo-coil and turn ratio >=1.5 × 10 of Secondary Winding6: 1, described magnetic core is the electric wire of electric railway；
Described electric railway arcing fault localizer by described communication interface by by analysis, process flashover current signal be sent to described repeater, described repeater further by communication line by described by analysis, process flashover current signal be sent to described server, by described terminal unit, it is possible to check be uploaded on described server by analysis, process flashover current signal.
As preferably, described electric railway arcing fault localizer also includes that administration of power supply, circuit board, described administration of power supply include accumulator and/or solar panel,
Signal processing unit is integrated on described circuit board,
Described administration of power supply is for powering for described circuit board.
As preferably, described administration of power supply includes accumulator and solar panel, and the electric energy that described solar panel produces can be stored in described accumulator.
As preferably, described electric railway arcing fault localizer also includes that auto-induction type solar charging circuit, described auto-induction type solar charging circuit include control chip, charging cable,
Data acquisition pin, data feedback pin, charging pins, judging unit is included on described control chip；Described accumulator is provided with the first pin, the second pin；Constituting loop between described data acquisition pin, data feedback pin, the first pin, the second pin, by described loop, described control chip can obtain the current voltage value of described accumulator,
Described charging pins is connected to described solar panel by described charging cable,
When described judging unit judges the current voltage value≤charge threshold of described accumulator, described charging cable is moved to low level by described charging pins, described solar panel, charging cable, control chip, accumulator turn on, and described solar panel charges to described accumulator；
When described judging unit judges the current voltage value >=saturation threshold of described accumulator, moving described charging cable to high level by described charging pins, described solar panel stops charging to described accumulator；
Wherein, described control chip and charging cable are integrated on described circuit board.
As preferably, described communication interface is an antenna.
As preferably, described Luo-coil, signal processing unit, communication interface, accumulator, solar panel, circuit board, antenna integrate,
Described electric railway arcing fault localizer also includes the first housing, the second housing, antenna mount；
Described first housing is one columnar structured, and described antenna mount is removably attachable to one end of described first housing, and described antenna is fixedly connected in described antenna mount；
Described first housing is provided with a breach, and described solar panel is fixed on described indentation, there；
Described accumulator is arranged in described first housing；
Described second housing includes base and upper cover, described base is fixedly connected on the other end of described first housing, it is flexibly connected between described upper cover and described base, line ball hole it is provided with between described base and described upper cover, the electric wire of electric railway passes described line ball hole so that described electric wire also passes axially through the center of described Luo-coil.
As preferably, described electric railway arcing fault localizer also includes articulated elements and detachable locking member,
One end of described base and described upper cover is hinged by described articulated elements；
Described base and described detachable upper cover can be linked together by described detachable locking member at the other end of described base and described upper cover with unloading.
As preferably, described articulated elements includes rotating shaft and pin,
One end of described base is provided with breach, one end of described upper cover is provided with projection, described breach can mutually be entrenched togather with described projection, at the through hole that the chimeric place of described base and described upper cover is communicated with, one end of described rotating shaft is provided with stop tab, the diameter of described stop tab is more than the diameter of described through hole, and described rotating shaft is also cross described base and described upper cover so that described upper cover can rotate centered by described rotating shaft；The other end of described rotating shaft is radially provided with pin-and-hole, and described pin is arranged in described pin-and-hole；
Described detachable locking member is clamping screw.
As preferably, described electric railway arcing fault localizer also includes the first line ball pad, the second line ball pad,
Described first line ball pad is arranged on described base, and described second line ball pad is arranged on described and covers, and is reserved with described line ball hole between described first line ball pad and described second line ball pad.
As preferably, described first line ball pad and the second line ball pad are made by damping material.
The electric railway flashover current data collecting system that this utility model provides includes electric railway arcing fault localizer, repeater, server, terminal unit, multiple electric railway arcing fault localizers include signal gathering unit, signal processing unit, communication interface, terminal unit, electric railway arcing fault localizer will by analysis by communication interface, the flashover current signal processed is sent to repeater, repeater further will by analysis by communication line, the flashover current signal processed is sent to server, pass through terminal unit, can check on uploading onto the server by analysis, the flashover current signal processed.It applies electric railway flashover current data pick-up, it is possible to realizes remote collection electric railway flashover current data, thus saves human resources.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit those of ordinary skill in the art be will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as restriction of the present utility model.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
The topological diagram of the electric railway flashover current data collecting system that Fig. 1 provides for the embodiment of the present invention；
The structural representation of first typical directions of the electric railway arcing fault localizer that Fig. 2 provides for the embodiment of the present invention；
The structural representation of a typical directions of the upper cover of application in the electric railway arcing fault localizer that Fig. 3 provides for the embodiment of the present invention；
The structural representation of second typical directions of the electric railway arcing fault localizer that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 is the schematic diagram after Fig. 3 pulls down upper cover；
Fig. 6 is the schematic diagram after Fig. 4 pulls down the electric wire of electric railway, the first line ball pad, the second line ball pad；
Fig. 7 is the schematic diagram after Fig. 5 pulls down base；
Fig. 8 is that Fig. 6 pulls down the structural representation after the first housing；
The schematic diagram of the Luo-coil of application in the electric railway arcing fault localizer that Fig. 9 provides for the embodiment of the present invention；
The schematic diagram of the auto-induction type solar charging circuit of application in the electric railway arcing fault localizer that Figure 10 provides for the embodiment of the present invention.
Detailed description of the invention
This utility model is to solve the problem that prior art exists, a kind of electric railway flashover current data collecting system, it applies electric railway flashover current data pick-up, it is possible to realize remote collection electric railway flashover current data, thus more suitable for practicality.
By further illustrating the technological means and effect that this utility model taked by reaching predetermined utility model purpose, below in conjunction with accompanying drawing and preferred embodiment, to according to the electric railway flashover data current data collecting system that the utility model proposes, its detailed description of the invention, structure, feature and effect thereof, after describing in detail such as.In the following description, what different " embodiments " or " embodiment " referred to is not necessarily same embodiment.Additionally, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
The terms "and/or", a kind of incidence relation describing affiliated partner, three kinds of relations can be there are in expression, such as, A and/or B, concrete is interpreted as: can include A and B simultaneously, can be with individualism A, it is also possible to individualism B, it is possible to possess above-mentioned three kinds of any one situations.
See accompanying drawing 1～9, the electric railway flashover current data collecting system that the present invention provides includes electric railway arcing fault localizer, repeater, server, terminal unit, electric railway arcing fault localizer includes signal gathering unit, signal processing unit, communication interface, terminal unit, signal gathering unit is for gathering the flashover current signal that electric railway is along the line, signal processing unit is for being analyzed flashover current signal, process, wherein, signal gathering unit is the Luo-coil of band magnetic core, winding of Luo-coil and turn ratio >=1.5 × 10 of Secondary Winding6: 1, magnetic core is the electric wire of electric railway；Electric railway arcing fault localizer by communication interface by by analysis, process flashover current signal be sent to repeater, repeater further by communication line by by analysis, process flashover current signal be sent to server, pass through terminal unit, it is possible to check on uploading onto the server by analysis, process flashover current signal.
The electric railway arcing fault localizer that the embodiment of the present invention provides includes signal gathering unit, signal processing unit, communication interface, terminal unit, signal gathering unit is for gathering the flashover current signal that electric railway is along the line, signal processing unit is for being analyzed flashover current signal, process, by communication interface, the analysis of flashover current signal, result can be sent to terminal unit；Wherein, signal gathering unit is the Luo-coil of band magnetic core, a winding of Luo-coil and turn ratio >=1.5 × 10 of Secondary Winding6: 1, magnetic core is the electric wire of electric railway.When tower bar insulator generation edge flashing, power frequency flashover current i (t) arrives the earth lead on tower bar along the arc channel of insulator surface, then flows into the earth along earth lead.This electric current produces the magnetic field of alternation around earth lead, and the magnetic line of force manifests concentric circular with earth lead for the center of circle.The magnetic field of alternation is sensed by Luo-coil, is converted into voltage signal U through signal processing circuitoutOutput.In this case, it is only necessary to the installation site of the electrified ferrum railway arcing fault localizer that the present invention provides is positioned, arcing fault can be positioned.
The most crucial exploring block of electric railway power frequency flashover current sensor is namely based on the flashover current detecting module of Luo-coil.It is formed, by two blocks of U-shaped ferrum, the iron core closed and winding forms.It is made to form the loop of a Guan Bi by the method for physics in actual use.Its umber of turn and the turn ratio of the secondary number of turn are 1500000: 1, that is when closed-loop path works, when input current is 1500A, output electric current is 1mA.This big input-output ratio is the most crucial in the application of electrified railway environment.Because in electric railway, voltage is all more than kilovolt, and flashover current is all more than 1000A rank.
In the present embodiment, electric railway arcing fault localizer 51a, 51b, 51c corresponding repeater 51 jointly, electric railway arcing fault localizer 52a, 52b, 52c corresponding repeater 52 jointly, electric railway arcing fault localizer 53a, 53b, 53c corresponding repeater 53 jointly, the common corresponding server 54 of repeater 51,52,53, terminal unit 55a, 55b, 55c corresponding server 54 jointly.Wherein, terminal unit can be PC or handheld terminal.
Wherein, electric railway arcing fault localizer also includes administration of power supply, circuit board, and administration of power supply includes accumulator and/or solar panel.Signal processing unit is integrated on circuit boards, and administration of power supply is for powering for circuit board.
Wherein, administration of power supply includes accumulator and solar panel, and the electric energy that solar panel produces can be stored in accumulator.
Seeing accompanying drawing 10, electric railway arcing fault localizer also includes that auto-induction type solar charging circuit, auto-induction type solar charging circuit include control chip 41, charging cable 44.Data acquisition pin, data feedback pin, charging pins, judging unit is included on control chip 41；Accumulator 42 is provided with the first pin, the second pin；Constituting loop between data acquisition pin, data feedback pin, the first pin, the second pin, by loop, control chip 41 can obtain the current voltage value of accumulator 42.Charging pins is connected to solar panel 43 by charging cable 44.When judging unit judges the current voltage value≤charge threshold of accumulator 42, charging cable is moved to low level by charging pins, solar panel 43, charging cable 44, control chip 41, accumulator 42 turn on, and solar panel 43 charges to accumulator 42.When judging unit judges the current voltage value >=saturation threshold of accumulator 42, moving charging cable 44 to high level by charging pins, solar panel 43 stops charging to accumulator 42；Wherein, control chip 41 and charging cable 44 are integrated on circuit board.In the present embodiment, control chip 41 also including charge saturated instruction pin and the saturated alarm mechanism that charges, the saturated instruction pin that charges can trigger the saturated alarm mechanism of charging.Alarm mechanism is selected from one or several in display lamp, buzzer, qq message, note, wechat message, speech message.Auto-induction type solar charging circuit also includes the pin that discharges, ground connection after the resistance of electric discharge pin external one >=10k Ω.Thus, when without target accumulator 42 is charged, it is possible to the electric energy produced by solar panel 43 is discharged by circuit 45 and this resistance.The model of control chip 41 is CN3063.Accumulator 42 is lithium battery.Control chip 41 is additionally operable to be controlled charge mode, and charge mode includes trickle charge pattern, constant current charging mode, constant-voltage charge pattern, constant temperature charge mode, sleep pattern.Auto-induction type solar charging circuit also includes charged state indicating mechanism, and charged state indicating mechanism is for indicating solar panel to the state of target accumulator charging.Auto-induction type solar charging circuit also includes temperature sensor, and temperature sensor is for the current temperature data of monitoring objective accumulator, and current temperature data feeds back to control chip, and control chip adjusts charge mode according to current temperature data.Charge threshold is 2.4V, and saturation threshold is 4.2V.
Wherein, communication interface is an antenna 16.
Wherein, Luo-coil 23, antenna 16, accumulator 35, solar panel 3, circuit board 32 integrate.Electric railway arcing fault localizer also includes first housing the 1, second housing, antenna mount 15.First housing 1 is columnar structured in one, and antenna mount 15 is removably attachable to one end of the first housing 1, and antenna 16 is fixedly connected in antenna mount 15 by fixing hole 27.First housing 1 is provided with a breach, and solar panel 3 is fixed on indentation, there.Accumulator 35 is arranged in the first housing 1.Second housing includes base 4 and upper cover 5, base 4 is fixedly connected on the other end of the first housing 1, is flexibly connected, is provided with line ball hole between base 4 and upper cover 5 between upper cover 5 and base 4, the electric wire 12 of electric railway is through line ball hole so that electric wire 12 also passes axially through the center of Luo-coil 23.
In the present embodiment, outfan is drawn by the first binding post 28 and the second binding post 29 by coil 27.
Wherein, electric railway arcing fault localizer also includes articulated elements and detachable locking member.One end of base 4 and upper cover 5 is hinged by articulated elements.Base 4 and upper cover 5 can be removably joined together by detachable locking member at the other end of base 4 and upper cover 5.During installation, open this detachable locking member so that after upper cover 5 rotates relative to base 4 with articulated elements for center of rotation, it is possible to be installed on the electric wire 12 of electric railway by the electric railway arcing fault localizer that the embodiment of the present invention provides.After making upper cover 5 rotate relative to base 4 with articulated elements for center of rotation the most again, the electric railway fault locator that the embodiment of the present invention provides can be fixed on the electric wire 12 of electric railway by this detachable locking member.
Wherein, articulated elements includes rotating shaft 13 and pin 14.One end of base 4 is provided with breach (between two pedestal lobes 19), one end of upper cover 5 is provided with protruding 18, breach (between two pedestal lobes 19) can mutually be entrenched togather with protruding 18, at the through hole 20-24 that the chimeric place of base 4 and upper cover 5 is communicated with, one end of rotating shaft 13 is provided with stop tab, the diameter of the stop tab diameter more than through hole 20-24, rotating shaft 13 is also cross base 4 and upper cover 5 so that upper cover 5 can rotate centered by rotating shaft 13；The other end of rotating shaft 13 is radially provided with pin-and-hole, and pin 14 is arranged in pin-and-hole.Entered part is clamping screw 21.
Wherein, electric railway arcing fault localizer also includes first line ball pad the 9, second line ball pad 6.First line ball pad 9 is arranged on base 4, and the second line ball pad 6 is arranged on upper cover 5, is reserved with line ball hole between the first line ball pad 9 and the second line ball pad 6.Wherein, the first line ball pad 9 includes the first adaptive half bore 11 of flank 10, first, and the first line ball pad 9 is fixed on base 4 by the first flank；Second line ball pad 6 includes the second flank 7 and the second adaptive half bore 8, and the second line ball pad 6 is fixed on upper cover 5 by the second flank 7；First adaptive half bore 11 and the involutory rear formation line ball hole of the second adaptive half bore 8, the electric wire for electric railway passes.
Wherein, the first line ball pad 9 and the second line ball pad 6 are made up of damping material.Thus the electric railway arcing fault localizer avoiding the present invention to provide rotates relative to the electric wire 12 of electric railway or slides.
In addition, the electric railway flashover that the embodiment of the present invention provides adheres fixed bit device and also includes battery compartment 33, battery compartment 33 includes overhead gage 31, lower baffle plate 34 and is arranged on the sidewall between overhead gage 31 and lower baffle plate 34, forming accommodation space between overhead gage 31, sidewall and lower baffle plate 34, condenser 35 is contained in this accommodation space.
Antenna mount 16 is removably joined together with the first housing by side opening 37, in order to take out battery compartment 33 by dismantling this antenna mount 15.
It is provided with the first pillar 36 between the lower baffle plate 34 of antenna mount 15 and battery compartment 33, between the overhead gage 31 of circuit board 32 and battery compartment 33, is provided with the second pillar 30 so that circuit board 32, battery compartment 33, antenna mount 15 are arranged relatively independently.
Additionally, the first housing 1 can also be split type, including Part I 1 and Part II 2, in order to the electric railway arcing fault localizer embodiment of the present invention provided by separation Part I 1 and Part II 2 is taken apart.
Although having been described for preferred embodiment of the present utility model, but those skilled in the art once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of this utility model scope.
Obviously, those skilled in the art can carry out various change and modification without deviating from spirit and scope of the present utility model to this utility model.So, if these amendments of the present utility model and modification belong within the scope of this utility model claim and equivalent technologies thereof, then this utility model is also intended to comprise these change and modification.
Claims (10)
1. an electric railway flashover current data collecting system, it is characterised in that include electric railway arcing fault localizer, repeater, server, terminal unit,
Described electric railway arcing fault localizer includes signal gathering unit, signal processing unit, communication interface, terminal unit,
Described signal gathering unit is used for gathering the flashover current signal that electric railway is along the line,
Described signal processing unit is used for described flashover current signal is analyzed, is processed,
Wherein, described signal gathering unit is the Luo-coil of band magnetic core, a winding of described Luo-coil and turn ratio >=1.5 × 10 of Secondary Winding6: 1, described magnetic core is the electric wire of electric railway；
Described electric railway arcing fault localizer by described communication interface by by analysis, process flashover current signal be sent to described repeater, described repeater further by communication line by described by analysis, process flashover current signal be sent to described server, by described terminal unit, it is possible to check be uploaded on described server by analysis, process flashover current signal.
Electric railway flashover current data collecting system the most according to claim 1, it is characterised in that described electric railway arcing fault localizer also includes that administration of power supply, circuit board, described administration of power supply include accumulator and/or solar panel,
Signal processing unit is integrated on described circuit board,
Described administration of power supply is for powering for described circuit board.
Electric railway flashover current data collecting system the most according to claim 2, it is characterised in that described administration of power supply includes accumulator and solar panel, the electric energy that described solar panel produces can be stored in described accumulator.
Electric railway flashover current data collecting system the most according to claim 3, it is characterized in that, described electric railway arcing fault localizer also includes that auto-induction type solar charging circuit, described auto-induction type solar charging circuit include control chip, charging cable
Data acquisition pin, data feedback pin, charging pins, judging unit is included on described control chip；Described accumulator is provided with the first pin, the second pin；Constituting loop between described data acquisition pin, data feedback pin, the first pin, the second pin, by described loop, described control chip can obtain the current voltage value of described accumulator,
Described charging pins is connected to described solar panel by described charging cable,
When described judging unit judges the current voltage value≤charge threshold of described accumulator, described charging cable is moved to low level by described charging pins, described solar panel, charging cable, control chip, accumulator turn on, and described solar panel charges to described accumulator；
When described judging unit judges the current voltage value >=saturation threshold of described accumulator, moving described charging cable to high level by described charging pins, described solar panel stops charging to described accumulator；
Wherein, described control chip and charging cable are integrated on described circuit board.
Electric railway flashover current data collecting system the most according to claim 4, it is characterised in that described communication interface is an antenna.
Electric railway flashover current data collecting system the most according to claim 5, it is characterised in that described Luo-coil, signal processing unit, communication interface, accumulator, solar panel, circuit board, antenna integrate,
Described electric railway arcing fault localizer also includes the first housing, the second housing, antenna mount；
Described first housing is one columnar structured, and described antenna mount is removably attachable to one end of described first housing, and described antenna is fixedly connected in described antenna mount；
Described first housing is provided with a breach, and described solar panel is fixed on described indentation, there；
Described accumulator is arranged in described first housing；
Described second housing includes base and upper cover, described base is fixedly connected on the other end of described first housing, it is flexibly connected between described upper cover and described base, line ball hole it is provided with between described base and described upper cover, the electric wire of electric railway passes described line ball hole so that described electric wire also passes axially through the center of described Luo-coil.
Electric railway flashover current data collecting system the most according to claim 6, it is characterised in that described electric railway arcing fault localizer also includes articulated elements and detachable locking member,
One end of described base and described upper cover is hinged by described articulated elements；
Described base and described detachable upper cover can be linked together by described detachable locking member at the other end of described base and described upper cover with unloading.
Electric railway flashover current data collecting system the most according to claim 7, it is characterised in that described articulated elements includes rotating shaft and pin,
One end of described base is provided with breach, one end of described upper cover is provided with projection, described breach can mutually be entrenched togather with described projection, at the through hole that the chimeric place of described base and described upper cover is communicated with, one end of described rotating shaft is provided with stop tab, the diameter of described stop tab is more than the diameter of described through hole, and described rotating shaft is also cross described base and described upper cover so that described upper cover can rotate centered by described rotating shaft；The other end of described rotating shaft is radially provided with pin-and-hole, and described pin is arranged in described pin-and-hole；
Described detachable locking member is clamping screw.
Electric railway flashover current data collecting system the most according to claim 6, it is characterised in that described electric railway arcing fault localizer also includes the first line ball pad, the second line ball pad,
Described first line ball pad is arranged on described base, and described second line ball pad is arranged on described and covers, and is reserved with described line ball hole between described first line ball pad and described second line ball pad.
Electric railway flashover current data collecting system the most according to claim 9, it is characterised in that described first line ball pad and the second line ball pad are made by damping material.
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| CN201620428493.3U CN205749778U (en) | 2016-05-13 | 2016-05-13 | A kind of electric railway flashover current data collecting system |
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| CN201620428493.3U CN205749778U (en) | 2016-05-13 | 2016-05-13 | A kind of electric railway flashover current data collecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785249A (en) * | 2016-05-13 | 2016-07-20 | 北京顺程高科技有限公司 | Electric railway flashover fault locator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105785249A (en) * | 2016-05-13 | 2016-07-20 | 北京顺程高科技有限公司 | Electric railway flashover fault locator |
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