CN111579854A - Current acquisition device and traction backflow monitoring system - Google Patents
Current acquisition device and traction backflow monitoring system Download PDFInfo
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- CN111579854A CN111579854A CN202010491141.3A CN202010491141A CN111579854A CN 111579854 A CN111579854 A CN 111579854A CN 202010491141 A CN202010491141 A CN 202010491141A CN 111579854 A CN111579854 A CN 111579854A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
- B60M5/02—Means for reducing potential difference between rail and adjacent ground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a current collecting device and a traction reflux monitoring system, relates to the technical field of current collection and monitoring, and is used for collecting and monitoring current related data of a traction reflux line. The current collection device includes: the control unit to and with the electric current collection sensor of control unit electricity connection respectively, get can power, clock unit, data memory cell and communication unit, it still is connected with electric current collection sensor electricity to get can the power. The traction reflux monitoring system comprises: the current acquisition device comprises a vehicle passing large current recording unit, a daily line current recording unit, a line abnormal current alarm unit, an equipment position recording unit, a current condition data display unit, a vehicle passing state picture recording unit, a vehicle passing picture and large current comparison unit and an abnormal information recording unit. The traction reflux circuit can be used for taking electricity on the traction reflux circuit, the current condition of the current traction reflux circuit is monitored in real time, and the faults of the traction reflux circuit are effectively reduced.
Description
Technical Field
The invention relates to the technical field of current acquisition and monitoring, in particular to a current acquisition device and a traction reflux monitoring system.
Background
With the economic high-speed growth of China, the railway transportation task is multiplied, the railway internal combustion engine traction train is gradually changed into the traction of an electric locomotive, and the domestic existing ordinary-speed railways are all changed into electrified railways. The power supply mode of the electrified railway is a power frequency single-phase alternating current system, and the power supply mode of the traction system is as follows: TB power supply mode, AT power supply mode and direct supply and return line direct supply mode. The direct supply and the return line direct supply are adopted in the power supply mode of the general speed railway traction system in combination with the transportation characteristics of the general speed railway.
The steel rail is a channel for traction backflow and is also a channel for signal current in a track circuit, and due to the increase of the traction backflow value, track circuit signal equipment, a track bed structure and the like are affected, and the signal equipment is damaged by overhigh steel rail potential, so that the driving safety is threatened. Unbalanced rail current affects the normal operation of the track circuit; the large medium current can also accumulate potential on the signal equipment, particularly the cable, and influence the normal operation of the signal equipment; the over-high steel rail potential influences the operation performance of a power supply system and threatens the safety of passengers and maintenance personnel at a station; when a contact network-steel rail short circuit occurs, dangerous contact voltage, step voltage and the like are formed. If underground pipes, cables and other metal components are buried near the running rails, a part of the stray current will flow from above. Can cause severe corrosion to underground pipes and other metal components.
The traction reflux of the high-speed railway is much larger than that of a normal-speed railway, the potential of a steel rail is much higher, and a lot of harm is generated, mainly comprising the following steps:
firstly, when passengers get on or off the train on a station platform, the passengers may suffer electric shock or feel electric anesthesia.
Secondly, electric shock accidents of maintenance personnel along the line can be caused.
Thirdly, the signal equipment connected with the track is easy to cause poor function or failure.
And fourthly, the aging and even burning of the insulating base plate between the steel rail and the sleeper can be accelerated.
Large unbalanced current is easy to generate between two steel rails, which affects the normal operation of the track circuit.
In order to effectively reduce the occurrence of the faults of the traction reflux line, a railway system urgently needs a system capable of monitoring current related information of the traction reflux line, but the domestic field of current monitoring of the traction system still belongs to the blank at present.
Disclosure of Invention
The invention provides a current collecting device and a traction reflux monitoring system, which are used for collecting and monitoring current related data of a traction reflux line.
In a first aspect, a current collecting apparatus according to an embodiment of the present invention includes: the energy acquisition power supply is also electrically connected with the current acquisition sensor; the current acquisition sensor is used for acquiring instantaneous transient current values in the circuit; the energy taking power supply takes out energy from a circuit in an electromagnetic coupling mode and is used for supplying power to the current acquisition system; the clock unit is used for covering the current value acquired by the current acquisition sensor each time with a timestamp; the data storage unit is used for locally storing the current value acquired by the current sensor; the communication unit is used for sending out the current value acquired by the current sensor; and the control unit is used for controlling the current acquisition sensor, the energy taking power supply, the clock unit, the data storage unit and the communication unit to work.
In another preferred embodiment, the method further comprises: the data encryption unit is electrically connected with the control unit; the data encryption unit is used for encrypting the current value before the communication unit sends the current value.
Preferably, the energy-taking power supply comprises: the energy taking sensor is used for taking out energy from a line in an electromagnetic coupling mode and directly supplying power; and the energy storage module is used for storing part of energy taken out from the energy taking sensor and supplying power for standby.
Preferably, the current collecting sensor comprises: a coil for inducing electromotive force in the line; and the integrator is used for restoring the electromotive force induced by the coil into the collected alternating current value.
Preferably, the current collecting sensor further comprises: and the amplifying circuit is arranged in front of the integrator and is used for amplifying the electromotive force induced by the coil.
Preferably, the sensing precision of the current acquisition sensor is smaller than a 1A current value.
Preferably, the communication unit adopts an adaptive 4G communication module.
Preferably, the method further comprises the following steps: and the control unit, the current acquisition sensor, the energy taking power supply, the clock unit, the data storage unit and the communication unit are arranged in the waterproof shell.
In a second aspect, a system for monitoring towing returns in one embodiment of the invention includes: the current acquisition device and the vehicle-passing heavy current recording unit are used for recording the current value which is greater than the preset threshold value and is sent by the current acquisition device when the train passes through; the daily line current recording unit is used for recording all current values on the line sent by the current acquisition device; the circuit abnormal current alarm unit is used for sending an alarm signal when the current value sent by the current acquisition device exceeds a preset numerical range; the equipment position recording unit is used for recording the position ID of the current acquisition device; the current condition data display unit is used for displaying the current condition data; the train passing state picture recording unit is used for shooting pictures of each passing train; the vehicle-passing photo and large current comparison unit is used for calling the corresponding photo shot by the vehicle-passing state photo recording unit and carrying out correlation comparison when the current value is recorded by the vehicle-passing large current recording unit; and the abnormal information recording unit is used for recording the abnormal information.
According to the current collecting device and the traction reflux monitoring system, the traction reflux line can be used for getting electricity, so that the traction reflux line can work and run for a long time, the current condition of the current traction reflux line is monitored in real time, the working condition of a railway is judged, the fault position can be quickly positioned once a fault occurs, and the fault of the traction reflux line is effectively reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a current collection device according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a current collection device according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a traction backflow monitoring system according to embodiment 3 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Embodiment 1, the current collecting device of this embodiment, as shown in fig. 1, includes: the control unit 11, and with the electric current collection sensor 12 of control unit 11 electricity respectively, get can power 13, clock unit 14, data memory cell 15 and communication unit 16, get can power 13 still and be connected with electric current collection sensor 12 electricity.
And the control unit 11 is used for controlling the current acquisition sensor 12, the energy-taking power supply 13, the clock unit 14, the data storage unit 15 and the communication unit 16 to work. In a specific implementation, the control unit 11 is mainly a low power consumption MCU chip, and the power consumption is as low as uW level.
The current acquisition sensor 12 is used for acquiring instantaneous transient current values in a line, including instantaneous transient values of passing and failing of a locomotive, the current acquisition sensor 12 adopts a high-precision coil, and can effectively respectively obtain current values below 1A.
The energy taking power supply 13 takes out energy from the line in an electromagnetic coupling mode, and is used for supplying power to the current collecting device of the embodiment.
And the clock unit 14 is used for providing a clock reference for the system (a temperature compensated clock (with the precision of 5PPM)) and covering the current value acquired by the current acquisition sensor 12 each time with a timestamp to find a time basis in event or fault data analysis.
And the data storage unit 15 is used for locally storing the current value acquired by the current sensor 12.
And the communication unit 16 is used for sending out the current value acquired by the current sensor 12. In specific implementation, the data is sent to a data analysis background through a 4G network, and the communication unit 16 is composed of an adaptive 4G module, and automatically switches various frequency bands to adapt to a local environment. The wireless communication is used as a communication mode of local storage (good stability and no interference from weather and electromagnetic interference).
The technology of 4G mobile communication has many surpassing points, and its characteristics mainly include:
(ii) high rate. For a large range of high speed mobile users (250km/h), the data rate is 2 Mb/s; for medium mobile users (60km/h), the data rate is 20 Mb/s; for low speed mobile users (indoors or walkers), the data rate is 100 Mb/s.
② digital broadband technology is taken as the main. In a 4G mobile communication system, signals use millimeter waves as a main transmission band, and a cell is also correspondingly small, so that user capacity is greatly improved, but a series of technical difficulties are caused.
And good compatibility. The 4G mobile communication system realizes a global unified standard, so that users of all mobile communication operators enjoy common 4G services, and a mobile phone can really communicate at any global place.
High flexibility. The 4G mobile communication system adopts an intelligent technology to realize self-adaptive resource allocation, can correspondingly process the size of a continuously changing service flow in the communication process to meet the communication requirement, adopts an intelligent signal processing technology to normally send and receive signals in various complex environments with different channel conditions, and has strong intelligence, adaptability and flexibility.
Multi-type user coexists. The 4G mobile communication system can carry out self-adaptive processing according to dynamic network and changing channel conditions, so that low-speed and high-speed users and various user equipment can coexist and intercommunicate, thereby meeting the requirements of multiple types of users of the system.
And sixthly, fusing multiple services. The 4G mobile communication system supports more abundant mobile services including high-definition image services, video conferences, virtual reality services, etc., so that users can obtain any required information service anywhere. The system integrates the industries of personal communication, information systems, broadcasting, entertainment and the like into a whole, and provides wider services and applications to users more safely and conveniently.
And seventhly, a highly self-organized and self-adaptive network. The 4G mobile communication system is a completely autonomous, adaptive network, having self-management capability for the structure to meet the changing demands of users in terms of services and capacity.
The current collection device of this embodiment can get the electricity on drawing the return circuit, and is more stable for solar panel power solution's the efficiency of getting electricity. The current condition of the current traction reflux line can be monitored in real time, so that the working condition of the railway can be judged. Once a fault occurs, the fault occurrence position can be quickly positioned; the problem of the life-span problem, the discernment ability of current device, power charge efficiency is solved.
Embodiment 2, the current collecting device of this embodiment, as shown in fig. 2, includes: the control unit 21, and with the electric current collection sensor 22 of control unit 21 electricity respectively, get can power 23, clock unit 24, data memory cell 25, communication unit 26, data encryption unit 27 and waterproof shell 28, get can power 23 still and electric connection with electric current collection sensor 22. The current collection sensor 22 includes: a coil 221, an amplification circuit 222, and an integrator 223; the energy-taking power supply 23 includes: an energy-taking sensor 231 and an energy storage module 232.
And the control unit 21 is used for controlling the current acquisition sensor 22, the energy-taking power supply 23, the clock unit 24, the data storage unit 25, the communication unit 26 and the data encryption unit 27 to work. In a specific implementation, the control unit 21 is mainly a low power consumption MCU chip, and the power consumption is as low as uW level.
The current acquisition sensor 22 is used for acquiring instantaneous transient current values in a line, including instantaneous transient values of passing and failing of a locomotive, the current acquisition sensor 22 adopts a high-precision current mutual inductance unit, and can effectively respectively obtain current values below 1A. In a specific implementation, the high-precision current collecting sensor 22 mainly made of iron-nickel alloy is a ring-shaped coil uniformly wound on a ferromagnetic material. The output signal is the current differential over time. The input current can be truly restored by a circuit which integrates the output voltage signal. The working principle is that the coil skeleton surrounds a detected conductor, the magnetic field around the conductor can be changed along with the change of current in the conductor, and the enameled wire on the skeleton can induce electromotive force. The current collection sensor 22 includes a coil 221 and an integrator 223. In order to accurately restore the electromotive force output induced by the coil 221 of the current collecting sensor 22 to the collected alternating current i, an inverting integrator 223 is also required. In addition, since the voltage induced by the current collecting sensor 22 is small, an amplifying circuit 222 is added in front of the integrator 223 in order to amplify the induced voltage.
The energy-taking power supply 23 takes out energy from the line in an electromagnetic coupling mode, and is used for supplying power to the current collecting device of the embodiment.
The energy-taking sensor 231 takes out energy from the line in an electromagnetic coupling mode for use by a system, the energy-taking sensor 231 is prepared by using soft magnetic alloy as a base material, and the characteristic of the soft magnetic alloy enables the energy-taking sensor 231 to effectively work under the working condition of a small current value.
The energy-taking sensor 231 respectively provides electric energy for the control unit 21, the current acquisition sensor 22 and the energy storage unit 232, a stable power supply can be continuously obtained on a low-load line, and a super capacitor of the energy storage unit 232 is charged to supply the whole equipment to operate. The energy-taking sensor 231 supplements the energy taken out from the line into the super capacitor of the energy storage unit 232, and when the energy in the line is not enough to support the control unit 21 to work, the energy storage unit 232 replaces the energy-taking sensor 231 to supply power to the control unit 21. In the energy storage unit 232 super capacitor, a porous electrode is adopted, activated carbon powder, activated carbon and activated carbon fiber are adopted, and an electrolyte is an organic electrolyte, such as propylene carbonate (propylene carbonate) or tetraethylammonium perchlorate (tetraethoxysilane). The porous electrode is formed by using porous activated carbon, so that the porous activated carbon has a large surface area to adsorb charges in an electrolyte, thereby having a large electric capacity and storing large electrostatic energy.
And the clock unit 24 is used for providing a clock reference for the system (a temperature compensated clock (with the precision of 5PPM)) and covering the current value acquired by the current acquisition sensor 22 each time with a timestamp to find a time basis in event or fault data analysis.
And the data storage unit 25 is used for locally storing the current value acquired by the current sensor 22.
And the communication unit 26 is used for sending out the current value acquired by the current sensor 22. In a specific implementation, the data is sent to a data analysis background through a 4G network, and the communication unit 26 is composed of an adaptive 4G module, and automatically switches various frequency bands to adapt to a local environment. The wireless communication is used as a communication mode of local storage (good stability and no interference from weather and electromagnetic interference).
The technology of the 4G mobile communication system has many surpassing points, and the characteristics are as follows:
(ii) high rate. For a large range of high speed mobile users (250km/h), the data rate is 2 Mb/s; for medium mobile users (60km/h), the data rate is 20 Mb/s; for low speed mobile users (indoors or walkers), the data rate is 100 Mb/s.
② digital broadband technology is taken as the main. In a 4G mobile communication system, signals use millimeter waves as a main transmission band, and a cell is also correspondingly small, so that user capacity is greatly improved, but a series of technical difficulties are caused.
And good compatibility. The 4G mobile communication system realizes a global unified standard, so that users of all mobile communication operators enjoy common 4G services, and a mobile phone can really communicate at any global place.
High flexibility. The 4G mobile communication system adopts an intelligent technology to realize self-adaptive resource allocation, can correspondingly process the size of a continuously changing service flow in the communication process to meet the communication requirement, adopts an intelligent signal processing technology to normally send and receive signals in various complex environments with different channel conditions, and has strong intelligence, adaptability and flexibility.
Multi-type user coexists. The 4G mobile communication system can carry out self-adaptive processing according to dynamic network and changing channel conditions, so that low-speed and high-speed users and various user equipment can coexist and intercommunicate, thereby meeting the requirements of multiple types of users of the system.
And sixthly, fusing multiple services. The 4G mobile communication system supports more abundant mobile services including high-definition image services, video conferences, virtual reality services, etc., so that users can obtain any required information service anywhere. The system integrates the industries of personal communication, information systems, broadcasting, entertainment and the like into a whole, and provides wider services and applications to users more safely and conveniently.
And seventhly, a highly self-organized and self-adaptive network. The 4G mobile communication system is a completely autonomous, adaptive network, having self-management capability for the structure to meet the changing demands of users in terms of services and capacity.
A data encryption unit 27 for encrypting the current value before the communication unit 26 sends out the current value. Specifically, a Ready-to-Use secure element is installed, which processes the submitted information before sending out the data: encryption, carrying a message digital signature, carrying geographic location information, etc.
And the waterproof shell 28 is used for placing the control unit 21, the current acquisition sensor 22, the energy-taking power supply 23, the clock unit 24, the data storage unit 25, the communication unit 26 and the data encryption unit 27 in the waterproof shell 28, so that the device of the embodiment is waterproof. In the concrete implementation, the waterproof casing 28 is made of aluminum alloy armor, and the material has excellent waterproof and anticorrosion effects, and has the characteristics of light weight, hardness, static electricity resistance, electromagnetic interference resistance and the like, so that the requirement of long-term use of the equipment in an outdoor power utilization environment can be effectively met. Because the energy-obtaining mode of the energy-obtaining power supply 23 is to obtain electricity by inducing line current on the circuit through a buckle, the equipment needs to be designed into a hollow mode for a lead to pass through, and the installation mode is to use a flexible hoop for fixing.
The current collection device of this embodiment can get the electricity on drawing the return circuit to need not expose in open air environment like solar panel, can seal in waterproof housing, still can normally get the electricity, prolonged device life, it is more stable to get the electricity efficiency for solar panel power solution. And this embodiment has still set up super capacitor as energy storage module, charges when getting can the sensor can be sufficient to get the ability, as reserve power supply mode when getting can the sensor can not be sufficient to get the ability, has ensured the stability of power supply more. The current condition of the current traction reflux line can be monitored in real time, so that the working condition of the railway can be judged. Once a fault occurs, the fault occurrence position can be quickly positioned; the problem of the life-span problem, the discernment ability of current device, power charge efficiency is solved. Meanwhile, the current collecting device of the embodiment encrypts the collected current value and then sends the current value to the background server, so that the data security is ensured, the local storage function is realized, all collected data can be stored locally temporarily, and if the 4G signal is weak, the data transmission cannot be completed, the breakpoint continuous transmission can be supported, the data loss is avoided, in addition, a local interface can be opened, the local data can be read through the mobile phone terminal, and the data integrity is ensured.
Embodiment 3, the system for monitoring backflow in traction of this embodiment, as shown in fig. 3, includes: a plurality of current collection devices 31 of the above embodiment 1 or 2 at the front end; a vehicle passing heavy current recording unit 32, a daily line current recording unit 33, a line abnormal current alarm unit 34, an equipment position recording unit 35 and a current condition data display unit 36 at the server end; and a passing state photo recording unit 37, a passing photo and large current comparing unit 38 and an abnormal information recording unit 39 of the linkage end.
And the current collecting device 31 is used for collecting the current value in the traction reflux line.
And the vehicle passing large current recording unit 32 is used for recording the current value which is greater than the preset threshold value and is sent by the current acquisition device 31 when the train passes through.
And the daily line current recording unit 33 is used for recording all current values on the line sent by the current acquisition device 31.
And the line abnormal current alarm unit 34 is used for sending out an alarm signal when the current value sent by the current acquisition device 31 exceeds a preset numerical range.
And the equipment position recording unit 35 is used for recording the position IDs of all the current collecting devices 31 so as to facilitate fault positioning.
The current condition data display unit 36 is used for displaying the current condition data, and may be a display screen in a specific implementation.
The passing state picture recording unit 37 is used for taking pictures of each passing train, and can be an industrial high-speed digital camera in specific implementation.
And the passing picture and large current comparing unit 38 is used for retrieving the corresponding picture taken by the passing state picture recording unit 37 when the current value is recorded by the passing large current recording unit 32, and performing correlation comparison to determine a possibly failed train.
And an abnormal information recording unit 39 for recording all the abnormal information for reference.
The traction backflow monitoring system can clearly reflect the current change information of the circuit on the monitoring system all day, including the reference current value of the non-passing vehicle, the instantaneous current information of the passing vehicle and the alarm information of the breathing lamp which can appear when the current is too large, so that the monitoring information which is most visual and necessary can be given to monitoring personnel. In order to more accurately reflect the corresponding relation between the line current and the information of vehicles coming and going, the existing monitoring system and the on-line monitoring system of a railway bureau can be linked, the current fluctuation situation of the line current and the running situation of the vehicles can be effectively and visually compared, and a better monitoring effect is achieved. The system can accurately display the specific position of each current acquisition device through the position ID of the current acquisition device, and is convenient to maintain the fault point of the traction reflux line.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A current collection device, comprising: the energy acquisition power supply is also electrically connected with the current acquisition sensor;
the current acquisition sensor is used for acquiring instantaneous transient current values in the circuit;
the energy taking power supply takes out energy from a circuit in an electromagnetic coupling mode and is used for supplying power to the current acquisition system;
the clock unit is used for covering the current value acquired by the current acquisition sensor each time with a timestamp;
the data storage unit is used for locally storing the current value acquired by the current sensor;
the communication unit is used for sending out the current value acquired by the current sensor;
and the control unit is used for controlling the current acquisition sensor, the energy taking power supply, the clock unit, the data storage unit and the communication unit to work.
2. The current-harvesting apparatus of claim 1, further comprising: the data encryption unit is electrically connected with the control unit;
the data encryption unit is used for encrypting the current value before the communication unit sends the current value.
3. The current-harvesting apparatus of claim 1, wherein the energy-harvesting power supply comprises: the energy taking sensor is used for taking out energy from a line in an electromagnetic coupling mode and directly supplying power;
and the energy storage module is used for storing part of energy taken out from the energy taking sensor and supplying power for standby.
4. The current collection device of claim 1, wherein said current collection sensor comprises:
a coil for inducing electromotive force in the line;
and the integrator is used for restoring the electromotive force induced by the coil into the collected alternating current value.
5. The current collection device of claim 4, wherein said current collection sensor further comprises: and the amplifying circuit is arranged in front of the integrator and is used for amplifying the electromotive force induced by the coil.
6. The current collection device of claim 1, wherein the current collection sensor has a sensing accuracy of less than 1A current value.
7. The current-sampling device of claim 1, wherein said communication unit employs an adaptive 4G communication module.
8. The current-harvesting apparatus of claim 1, further comprising: and the control unit, the current acquisition sensor, the energy taking power supply, the clock unit, the data storage unit and the communication unit are arranged in the waterproof shell.
9. A traction backflow monitoring system, comprising: an electrical current collection device according to any one of claims 1 to 8, and
the vehicle-passing heavy current recording unit is used for recording the current value which is greater than the preset threshold value and is sent by the current acquisition device when the train passes through;
the daily line current recording unit is used for recording all current values on the line sent by the current acquisition device;
the circuit abnormal current alarm unit is used for sending an alarm signal when the current value sent by the current acquisition device exceeds a preset numerical range;
the equipment position recording unit is used for recording the position ID of the current acquisition device;
the current condition data display unit is used for displaying the current condition data;
the train passing state picture recording unit is used for shooting pictures of each passing train;
the vehicle-passing photo and large current comparison unit is used for calling the corresponding photo shot by the vehicle-passing state photo recording unit and carrying out correlation comparison when the current value is recorded by the vehicle-passing large current recording unit;
and the abnormal information recording unit is used for recording the abnormal information.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542895A (en) * | 2020-11-05 | 2021-03-23 | 北京全路通信信号研究设计院集团有限公司 | Steel rail traction current electricity taking device and application thereof |
| CN113970709A (en) * | 2021-10-27 | 2022-01-25 | 徐州中矿传动轨道科技有限公司 | Method and system for positioning local insulation damage point of subway steel rail to ground |
| CN114537470A (en) * | 2022-02-11 | 2022-05-27 | 北京全路通信信号研究设计院集团有限公司 | Fault analysis method and system based on online data |
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| CN114537470B (en) * | 2022-02-11 | 2023-06-30 | 北京全路通信信号研究设计院集团有限公司 | Fault analysis method and system based on-line data |
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