CN107914737A - Broken rail detection method and device - Google Patents
Broken rail detection method and device Download PDFInfo
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- CN107914737A CN107914737A CN201710979312.5A CN201710979312A CN107914737A CN 107914737 A CN107914737 A CN 107914737A CN 201710979312 A CN201710979312 A CN 201710979312A CN 107914737 A CN107914737 A CN 107914737A
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- broken rail
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 230000005611 electricity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000019491 signal transduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
- B61L23/042—Track changes detection
- B61L23/044—Broken rails
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
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 difference 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 difference 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 difference on two rail 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.
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 electric current to rail；
Reception device, connects two rail, and receives above-mentioned electric current；
Processor, by the phasor difference of the both ends electric current of earthing or grounding means, 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 difference between currents are calculated by processor and obtained.
Optionally, the difference between currents are 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, compares the vector difference of the first electric current and the second electric current and be
No to meet predetermined condition, first electric current and the second electric current are the electric current on the first rail and the second rail respectively；
If the vector difference meets predetermined condition, judge that broken rail occurs for rail.
Optionally, the predetermined condition is：The absolute value and the first electric current of the difference of first electric current and the second electric current and
Two electric currents 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 difference is unsatisfactory for predetermined condition, 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 scape schematic diagram in the embodiment of the present application；
Fig. 2 is the schematic diagram without broken rail detection device in the case of broken rail that the application one embodiment provides；
Fig. 3 is the schematic diagram of broken rail detection device in the case of the broken rail that the application another embodiment provides
Fig. 4 is the partial schematic diagram of broken rail detection device in the case of the broken rail that the application further embodiment provides；
Fig. 5 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. 2 is the schematic diagram without broken rail detection device in the case of broken rail that the application one embodiment provides, such as Fig. 2 institutes
Show, two rails 203,204 there is railway roadbed resistance between rail, which includes connecing between being arranged at two rail 203,204
Ground device 206,207, 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 201, its to rail send electric current, reception device 202, for the electricity transmitted by transmission and reception apparatus 201
Stream, processor 205, passes through electric current I1And I2Judge whether rail occurs broken rail, occur if any broken rail, then send broken rail signal, scheme
Shown in 2 is the situation that no broken rail occurs, in this case, whole track circuit system topology be for ground wire it is symmetrical, such as
Shown in Fig. 2, two rail as signal transduction pathway are in symmetrical balance state in this state, i.e., in same position
Put place, the electric current in upper and lower rail bar is to wait big reverse, and spacing current passes through railway roadbed resistance and enters the earth under this state.
Fig. 3 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 3,
When track circuit is in broken rail state, since current path is cut off in one rail 203 of broken rail point, and another rail
204 still normal circulating currents, cause the state of two rail no longer symmetrical.The electric current of upper and lower two one steel rail no longer waits big anti-
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 reversely, I2=I1, β=0；
During broken rail, in broken rail point, I1=0, I2≠ 0, degree of unbalancedness β=100%；In other positions, β is one between 0 He
100% number.
In earth point, the imbalance of rail can also reflect on the earth current of earth point.Such as Fig. 4, in the state of the equilibrium,
The cut set of rail, grounding apparatus and lead wire composition, due to upper and lower rail bar current-symmetrical, according to Kirchhoff's current law (KCL), connects
Place earth current is 0；
After broken rail, rail is in non-equilibrium state, and upper and lower rail bar electric current is no longer symmetrical, thus earth point can be caused to have into ground
Electric current, earth current INThe difference of unbalance vector exactly above and below both sides, at this time, the degree of unbalancedness table of receiving end rail level earth point position
It is as follows up to formula：
If 3 signal codes of above receiving end rail level meet following relation：
Then it may determine that, broken rail occurs in rail.
Certainly, judging the β threshold values of broken rail 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 205, can input I1And I2Two electric currents, and due to IN=| I1-I2|, therefore processor
Input terminal can also directly input IN。
Fig. 5 is the broken rail detection method that the application one embodiment provides, as shown in figure 5, comprising the following steps：
Step 501, 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 502, if first voltage is more than or equal to first voltage threshold value, the difference 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 electric current and the second rail on the first rail
On the vector difference of the second electric current whether meet preset condition, the preset condition can be the first electric current and the second electric current
Vector difference and the vector sum value of the first electric current and the second electric current ratio be 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 503, if the difference 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 502, further include, if the difference 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 501 and continues to rail
It is monitored.
After step 501, step 504 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 505, 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.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
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 electric current to rail；
Reception device, connects two rail, and receives above-mentioned electric current；
Processor, by the phasor difference of the both ends electric current of earthing or grounding means, 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. broken rail detection device as claimed in claim 1, the difference between currents are calculated by processor and obtained.
4. broken rail detection device as claimed in claim 1, the difference between currents 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 difference 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 electric current on the first rail and the second rail respectively；
If the vector difference meets predetermined condition, judge that broken rail occurs for rail.
7. broken rail detection method as claimed in claim 6, the predetermined condition are：The difference of first electric current and the second electric current
Absolute value and the first electric current and the second electric current and value ratio is 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 difference is unsatisfactory for predetermined condition, 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 |
|---|---|---|---|
| CN201710979312.5A CN107914737B (en) | 2017-10-19 | 2017-10-19 | Broken rail detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979312.5A CN107914737B (en) | 2017-10-19 | 2017-10-19 | Broken rail detection method and device |
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| Publication Number | Publication Date |
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| CN107914737A true CN107914737A (en) | 2018-04-17 |
| CN107914737B CN107914737B (en) | 2021-02-09 |
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|---|---|---|---|
| CN201710979312.5A Active CN107914737B (en) | 2017-10-19 | 2017-10-19 | Broken rail detection method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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