CN108008210A - Broken rail detection method and device - Google Patents
Broken rail detection method and device Download PDFInfo
- Publication number
- CN108008210A CN108008210A CN201710980531.5A CN201710980531A CN108008210A CN 108008210 A CN108008210 A CN 108008210A CN 201710980531 A CN201710980531 A CN 201710980531A CN 108008210 A CN108008210 A CN 108008210A
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- Prior art keywords
- rail
- voltage
- broken
- broken rail
- electric current
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Classifications
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
Abstract
This application discloses a kind of broken rail detection method and device.The described method includes：Judge whether first voltage is less than first voltage threshold value, if the first voltage, which is the voltage first voltage at reception device, is more than or equal to first voltage threshold value, whether the vector sum value for then comparing the first electric current and the second electric current meets predetermined condition, and first electric current and the second electric current are the electric current on the first rail and the second rail respectively；If the vector sum value meets predetermined condition, judge that broken rail occurs for rail.Method and device provided by the embodiments of the present application is by the current phasor on two rail and to determine whether generation broken rail, from the influence of transverse circuit, makes judging result more accurate.
Description
Technical field
The application belongs to track field, more particularly to a kind of broken rail detection method and device.
Background technology
Broken rail refers to the rail for forming the necessary current path of track circuit, due to originals such as mechanical damage or stress accumulations
Cause, occurs fracture and the state in entirely electrical dialysis.Broken rail forms great threat to the traffic safety of train, be cause it is more
The immediate cause of secondary passenger and freight train derailment accident.Therefore, the early warning to broken rail with checking the monitoring content to necessitate in real time.
At present, no matter axle counting system or the system based on satellite positioning or the positioning based on communication, can not be real-time
Reflect the whether complete characteristic of circuit, track inspection car does not possess real-time according to specific period inspection.And track circuit is sharp
By the use of rail as its current path, the circuit construction variations on rail occur, such as branch, fracture, Real Time Effect is received
The receiving voltage of device, is based on this feature, and track circuit becomes the work for being almost uniquely possible to real-time broken rail inspection at present
Tool.
At present, either natural attenuation formula is also galvanically isolated the non-insulated track circuit of formula, is rail when utilizing broken rail
The principle that the voltage that road circuit receivers receive falls.Such as Fig. 1, before broken rail occurs, rail is as the good of electric signal
Good conductor, the signal that can send transmitter are effectively conducted to receiver, and when the dialysis of rail somewhere, electric current occurs in rail
Interrupt, the electric current sent out by transmitter can only get to receiver around broken rail point.In general, electric current can also via rail-
The path of railway ballast resistance-the earth-railway ballast resistance-rail flows to receiver, but compared with the rail as good conductor, it is above-mentioned to detour
The impedance of path greatly increases, and the electric current for causing that receiver can be reached greatly reduces after broken rail, and receiving voltage is fallen.
Tractive power supply system of the prior art is illustrated in figure 2, electric energy is obtained from contact net after electric locomotive rising bow,
After main transformer is depressured, locomotive engine is supplied.Feed line, contact net, rail and return wire form a two-conductor line power supply system
System, and form a closed circuit through electric locomotive.The electric current flowed in traction power supply circuit is traction current.Due to rail with
There are conductance between the earth, therefore traction current has portion of electrical current to be released into the earth by rail after electric locomotive is flowed through.
However, to ensure the personal safety of railway rail, railway roadbed personnel, rail generally has grounding measures to reduce traction
The rail voltage lifting that current strap is come.This ground connection be by by the central point that the air core coil of track circuit or chokes become with
Trackside ground wire is connected what is realized, is also called lateral connection.Lateral connection has the Broken rail detection of track circuit important influence,
Because signal code can be by being grounded the path for reaching receiving terminal after afterflow by transverse connecting line by transmitting terminal via trackside
To receiver.Current path caused by lateral connection can cause the broken rail residual voltage of receiver to increase.And heavily loaded in recent years, high-speed iron
Traction current in road is increasing, to reduce rail voltage, then needs to reduce the distance between two lateral connections, and this
The Broken rail detection allowance of Voltage Drop formula Broken rail detection technology is further compressed in the reduction of distance.
Limitation and problem are brought to track circuit to ensure Broken rail detection, presently, there are following problem：
In section, lateral connection and ground connection are to ensure that the condition of rail level personal safety voltage, while also constitute rail
Exterior detour circuit, may result in rail broken rail can not be checked.In order to ensure external circuit impedance, it is necessary to outside it
The setting spacing in circuit is limited.
In station, detour circuit causes track circuit to lose branch outside track circuit in order to prevent, it is necessary to is returned in side
Position is flowed using single chokes or disconnects chokes midpoint connecting line.On objective special line road, this connecting line mode triggers reflux not smooth
Breakdown insulation, wheel when crossing insulation joint circuitry cuts starting arc burn insulation joint and rail head of rail.
The content of the invention
In order to overcome above-mentioned technical problem, the embodiment of the invention discloses a kind of broken rail detection method and device.
In a first aspect, a kind of broken rail detection device is provided in the embodiment of the present application, including：
Earthing or grounding means, is arranged between two rail, and is connected with two rail；
Dispensing device, connects two rail, and sends signal code to rail；
Reception device, connects two rail, and receives above-mentioned signal code；
Contact net, to vehicle supply electric energy, and forms traction current in rail
Processor, when the voltage at reception device is less than first voltage threshold value, electricity is drawn by the both ends of earthing or grounding means
The vector sum of stream, judges whether that broken rail occurs.
Optionally, the earthing or grounding means is air core coil, the centre-point earth of the air core coil.
Optionally, the sum of described electric current is calculated by processor and obtained.
Optionally, the sum of described electric current is obtained by the earth current of the earth point of earthing or grounding means.
Optionally, described device further includes warning device, when judging broken rail, sends alarm in real time.
On the other hand, a kind of broken rail detection method is provided in the embodiment of the present application, including：
Judge whether first voltage is less than first voltage threshold value, the first voltage is the voltage at reception device；
If first voltage is more than or equal to first voltage threshold value, compare the arrow of the first traction current and the second traction current
Whether amount and value meet predetermined condition, and first traction current and the second traction current are the first rail and the second rail respectively
On traction current；
If the vector sum value meets predetermined condition, judge that broken rail occurs for rail.
Optionally, the predetermined condition is：First traction current and the second traction current and the absolute value of value and first
Traction current and the second traction current and value ratio is more than 0.5
Optionally, if first voltage is less than first voltage threshold value, broken rail alarm is sent.
Optionally, if being unsatisfactory for predetermined condition with value, judge that rail is in adjustment state.
Optionally, after a predetermined time, if first voltage is more than first voltage threshold value, alarm is stopped.
Brief description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of application.
Fig. 1 is background technology schematic diagram in the embodiment of the present application；
Fig. 2 is tractive power supply system schematic diagram in the embodiment of the present application；
Fig. 3 is the schematic diagram without broken rail detection device in the case of broken rail that the application one embodiment provides；
Fig. 4 is the schematic diagram of broken rail detection device in the case of the broken rail that the application another embodiment provides
Fig. 5 is the partial schematic diagram of broken rail detection device in the case of the broken rail that the application further embodiment provides；
Fig. 6 is the schematic diagram of the broken rail detection method of the application another embodiment offer.
Embodiment
To enable present invention purpose, feature, advantage more obvious and understandable, below in conjunction with the application
Attached drawing in embodiment, is clearly and completely described the technical solution in the embodiment of the present application, it is clear that described reality
It is only some embodiments of the present application to apply example, and not all embodiments.Based on the embodiment in the application, people in the art
Member's all other embodiments obtained without making creative work, shall fall in the protection scope of this application.
Set it will be understood by those skilled in the art that the term such as " first ", " second " in the application is only used for difference difference
Standby, module or parameter etc., neither represent any particular technology implication, also do not indicate that the inevitable logical order between them.
Fig. 3 is the schematic diagram without broken rail detection device in the case of broken rail that the application one embodiment provides, such as Fig. 3 institutes
Show, two rails 303,304 there is railway roadbed resistance between rail, which includes connecing between being arranged at two rail 303,304
Ground device 306,307, the earthing or grounding means can be air core coils, and the central point of the air core coil is earth point, is arranged at rail
Between dispensing device 301, its to rail send signal code, reception device 302, for transmitted by transmission and reception apparatus 301
Signal code.Traction substation is powered to contact net, when vehicle rising bow, electric energy is obtained by contact net, so as to drive car
Operation, feed line, contact net, rail and return wire form a two-conductor line electric power system, therefore exist in rail in the same direction
Symmetrical traction current I1And I2.Processor 305, passes through electric current I1And I2Judge whether rail occurs broken rail, occur if any broken rail,
Broken rail signal is then sent, shown in Fig. 3 is the situation that no broken rail occurs, and is to be in traction current in this two rail of state
Symmetrical balance state, i.e., at same position, the traction current in upper and lower rail bar is that grade is big in the same direction.Processor 305 at this time
Broken rail signal is not exported.
Fig. 4 is the schematic diagram of broken rail detection device in the case of the broken rail that the application one embodiment provides, as shown in figure 4,
When track circuit is in broken rail state, since current path is cut off in one rail 303 of broken rail point, and another rail
304 still normal circulating currents, cause the state of two rail no longer symmetrical.The electric current of upper and lower two one steel rail Datong District such as no longer
To, in broken rail point, this feature instantiation obtain it is the most obvious because to flow through electric current be zero during that root rail bar of broken rail occurs, and another
Still there is electric current to flow through in a piece rail bar, if introducing degree of unbalancedness come if weighing the uneven degree of two electric currents, it is defined such as
Under：
Before broken rail, upper and lower rail bar electric current etc. is big in the same direction, I2=I1,
During broken rail, in broken rail point, I1=0, I2≠ 0, degree of unbalancednessIn other positions,Be one between
0 and 100% number.
In earth point, the imbalance of rail can also reflect on the earth current of earth point.Such as Fig. 5, in the state of the equilibrium,
The cut set of rail, grounding apparatus and lead wire composition, since upper and lower rail bar current-symmetrical is in the same direction, determines according to kirchhoff electric current
Rule, earth point earth current is IN=I1+I2=2I1=2I2；
After broken rail, rail is in non-equilibrium state, and upper and lower rail bar electric current is no longer symmetrical, thus ground connection can be caused to click and enter ground electricity
Rheology, lead wire electric current I1≠I2, earth current INThe sum of unbalance vector exactly above and below both sides, at this time, receiving end rail level ground connection
The degree of unbalancedness expression formula of point position is as follows：
If above receiving end rail level 3 traction currents of earth point meet following relation：
Then it may determine that, broken rail occurs in rail.
Certainly, broken rail is judgedThreshold value can be set according to actual conditions or experience, for example the material of track becomes
Change or the temperature of environment changes, possible β ＞ 40% when just may determine that broken rail.
The input terminal of processor 305, can input I1And I2Two electric currents, and due to IN=| I1+I2|, therefore processor
Input terminal can also directly input IN。
Fig. 6 is the broken rail detection method that the application one embodiment provides, as shown in fig. 6, comprising the following steps：
Step 601, judge whether first voltage is less than first voltage threshold value；
In one embodiment, the first voltage is the rail surface voltage at reception device, when being abnormal situation constantly,
Rail surface voltage falls, which can rule of thumb or test data is set, for different environment and difference
Rail material, which can be different.
Step 602, if first voltage is more than or equal to first voltage threshold value, the sum of the first electric current and the second electric current is compared
Whether value meets predetermined condition；
In general, if the first voltage is more than or equal to first voltage threshold value, the prior art can be directly regarded as
There is no broken rail, but since the presence of transverse circuit, such case may give birth to broken rail.Therefore in one embodiment
In, if first voltage is more than or equal to first voltage threshold value, continue to compare the first traction current and second on the first rail
Whether the vector sum value of the second traction current on rail meets preset condition, the preset condition can be the first electric current and
The ratio of the vector sum value of the vector difference of second electric current and the first traction current and the second traction current is more than 0.5：
Certain this ratio can rule of thumb or test data is set, for different environment and different track materials
Material, the threshold value can be different.
Step 603, if described and value meets predetermined condition, judge that broken rail occurs for rail.
In one embodiment, if above-mentioned phasor difference and the ratio of vector sum meet that preset condition, such as ratio are more than
0.5, then judge that broken rail occurs for rail, alarm can be sent at this time, broken rail occurs for warning, and shown alarm can be sent out by relay
Go out, for example judge broken rail, then relay is fallen, and sends feux rouges or alarm tone etc..
After step 602, further include, if described and value is unsatisfactory for preset condition, judge that rail is in normal and adjusts
Whole state；At this time, judge that broken rail does not occur for rail, relay energized, does not send alarm, jumps to step 601 and continues to rail
It is monitored.
After step 601, step 604 is further included, if first voltage is less than first voltage threshold value, judges rail hair
Raw abnormal conditions, send alarm；
Such case, is exactly the method that tradition judges broken rail, and the voltage at receiving device falls, then judges rail
Broken rail, in embodiments of the present invention, is regarded as abnormal conditions, temporarily sends alarm, determined whether according to follow-up condition
Whether situation is abnormal.The abnormal conditions are train occupation, cable break, equipment fault or broken rail.
Step 605, after elapse of a predetermined time, if first voltage is greater than or equal to first voltage threshold value, police is stopped
Report；If first voltage judges that abnormal conditions do not eliminate, continues to keep alarm again below first voltage threshold value.
Under normal conditions, if abnormal conditions disappear, the voltage at reception device recovers normal, and relay energized is alert
Report stops.If after the scheduled time, first voltage is still less than first voltage threshold value, then judges that abnormal conditions are still deposited
, then guard relay is fallen, keep alarm.
Those of ordinary skill in the art may realize that each exemplary list described with reference to the embodiments described herein
Member and method and step, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, application-specific and design constraint depending on technical solution.Professional technician
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
Scope of the present application.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, the technical solution of the application is substantially in other words
The part to contribute to original technology or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform each embodiment the method for the application all or part of step.
And foregoing computer read/write memory medium is included with storage such as computer-readable instruction, data structure, program
Any mode or technology of the information such as module or other data are come the physics volatile and non-volatile, removable and can not realized
Because of eastern medium.Computer read/write memory medium specifically includes, but is not limited to, USB flash disk, mobile hard disk, read-only storage (ROM,
Read-Only Memory), random access memory (RAM, RandomAccess Memory), erasable programmable is read-only deposits
Reservoir (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory or other solid-state memory technologies, CD-ROM, number
Word versatile disc (DVD), HD-DVD, blue light (Blue-Ray) or other light storage devices, tape, disk storage or other magnetism
Storage device can be used for any other medium that stores information needed and can be accessed by computer.Embodiment of above is only
For illustrating the present invention, and not limitation of the present invention, those of ordinary skill in technical field, is not departing from the present invention
Spirit and scope in the case of, can also make a variety of changes and modification, therefore all equivalent technical solutions fall within this
The category of invention, scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of broken rail detection device, including：
Earthing or grounding means, is arranged between two rail, and is connected with two rail；
Dispensing device, connects two rail, and sends signal code to rail；
Reception device, connects two rail, and receives above-mentioned signal code；
Contact net, to vehicle supply electric energy, and forms traction current in rail
Processor, when the voltage at reception device is less than first voltage threshold value, passes through the both ends traction current of earthing or grounding means
Vector sum, judges whether that broken rail occurs.
2. broken rail detection device as claimed in claim 1, the earthing or grounding means is air core coil, the center of the air core coil
Point ground connection.
3. the sum of broken rail detection device as claimed in claim 1, described electric current are calculated by processor and obtained.
4. the sum of broken rail detection device as claimed in claim 1, described electric current by earthing or grounding means earth point earth current
Obtain.
5. broken rail detection device as claimed in claim 1, described device further include warning device, when judging broken rail, in real time
Send alarm.
6. a kind of broken rail detection method, including：
Judge whether first voltage is less than first voltage threshold value, the first voltage is the voltage at reception device；
If first voltage is more than or equal to first voltage threshold value, whether the vector sum value for comparing the first electric current and the second electric current is full
Sufficient predetermined condition, first electric current and the second electric current are the traction current on the first rail and the second rail respectively；
If the vector sum value meets predetermined condition, judge that broken rail occurs for rail.
7. broken rail detection method as claimed in claim 6, the predetermined condition are：First traction current and the second traction current
Absolute value and value and the ratio of the first traction current and the second traction current and value absolute value be more than 0.5.
8. broken rail detection method as claimed in claim 6, if first voltage is less than first voltage threshold value, sends broken rail police
Report.
9. broken rail detection method as claimed in claim 6, if being unsatisfactory for predetermined condition with value, judges that rail is in adjustment shape
State.
10. broken rail detection method as claimed in claim 8, after a predetermined time, if first voltage is more than the first electricity
Threshold value is pressed, then stops alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980531.5A CN108008210B (en) | 2017-10-19 | 2017-10-19 | Broken rail detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980531.5A CN108008210B (en) | 2017-10-19 | 2017-10-19 | Broken rail detection method and device |
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| CN108008210A true CN108008210A (en) | 2018-05-08 |
| CN108008210B CN108008210B (en) | 2021-03-23 |
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Cited By (2)
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| CN112068030A (en) * | 2020-09-27 | 2020-12-11 | 安徽江淮汽车集团股份有限公司 | Fault detection method, equipment, storage medium and device of grounding system |
| CN113125510A (en) * | 2021-04-21 | 2021-07-16 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Broken rail inspection method and system |
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