CN104254472A - Method and apparatus for detecting railway system defects - Google Patents
Method and apparatus for detecting railway system defects Download PDFInfo
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- CN104254472A CN104254472A CN201380021342.5A CN201380021342A CN104254472A CN 104254472 A CN104254472 A CN 104254472A CN 201380021342 A CN201380021342 A CN 201380021342A CN 104254472 A CN104254472 A CN 104254472A
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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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- 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
- B61L23/045—Rail wear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/50—Trackside diagnosis or maintenance, e.g. software upgrades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L2205/00—Communication or navigation systems for railway traffic
- B61L2205/04—Satellite based navigation systems, e.g. global positioning system [GPS]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/025—Absolute localisation, e.g. providing geodetic coordinates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/026—Relative localisation, e.g. using odometer
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
A technique for detecting faults in railway systems, such as defects in rails, is proposed, an alternating electrical signal is induced in a component of a rail vehicle (typically the electric locomotive) which is electrically connected to a rail. The signal is inductively detected, and a signal processing operation is performed to identify defects based on the detected signal. Under normal circumstances, the detected signal is of a specific level. If there is any abnormality, for example a poor electrical contact due to partially damaged rail (higher impedance) or a partial-short of motor (lower impedance), the impedance associated with the rail changes, which will be reflected by the detected signal having a lower or higher amplitude than its normal level.
Description
Technical field
The present invention relates to the fault detection method for the railway system of such as rail fault and device, in particular to " in real time " system of commitment rail fault being detected (namely, standard trajectory traffic in circuit is use, instead of during independent maintenance operation).
Background technology
The safety of passenger and reliability of service are the problems that in world wide, railway operator shows great attention to.Signal error and rail fault are two large major causes [1-2] of service disruption and accident, and described rail fault is as overstepped the limit [3].In view of any abnormality of railway control signal can be easily monitored, and the mechanical breakdown of described track more will be difficult to real-time detection, and usually detected during periodical maintenance.
In addition, the track that two " running rails " when conventional train travels are usually used in via carrying high pressure provides electrical power to electric traction system.Such electric power supply track refers to " the 3rd track " (although this term can be understood as the high pressure rail also comprising the railway system, the number of such as running rail is not equal to the single track system of two) here.3rd track maintains high direct current (DC) voltage (normally 750V or higher).Fig. 1 is the photo of a part for conventional electric power train, and as shown in the figure, described train is provided with collector shoe (element of oval 1 li), and described collector shoe has upper surface 2.Collector shoe slides to receive vdc along the bottom of the 3rd track.Because the 3rd orbit launching electric power is to electric power follow-up system, its situation has direct impact to train maintenance reliability and passenger safety.
The most ancient method detecting rail fault is sight control.Unfortunately, sight control is merely able to the external fault detecting visual clarity, and can not detect the internal fault of track, such as transverse fissure, it is the internal division of the iron and steel in track head.Such fault is known can cause serious accident, and therefore more complicated fault detection technique is developed.
Current injection method adopts ultrasonic electric current or eddy current technology, and it mainly concentrates on the fault detected in two running rails instead of the situation in the 3rd track.Ultrasonic technique needs special track inspection car.Ultrasonic probe and tracker are affixed on vehicle to verify the situation of railroad track.Due to the answering time of ultrasonic guidance ripple, commercially available ultrasonic examination vehicle general inspection speed is lower than 60km/h [4].Due to this speed restriction, ultrasound can not be installed on operating train.Therefore, track inspection can only be performed at inoperative time.
Eddy current technology uses induction field to generate eddy current on the surface of track, and as shown in Figure 2, eddy current obtains thus.Eddy current technology can not detect the superficial failure parallel with the eddy current of inducting, and therefore, eddy current technology is widely used unlike ultrasonic technique.In most example, eddy current checks the equipment and is only installed on ultrasonic examination vehicle when needing higher inspection particularity.As far as we know, all existing Examined effect only can check traveling railroad track, and can not check the railway electrification system comprising the 3rd track, collector shoe and Train electrical traction system.
In view of the operating time of the track traffic frequency increased gradually and prolongation, existing track Examined effect obviously can not make us satisfied.Thus the more effective mode of rail fault early detection is needed.
Summary of the invention
The object of the present invention is to provide a kind of novelty of the fault for detecting the railway system and useful method and apparatus.
Briefly, the present invention proposes alternate electrical signal and responds in the element of guideway vehicle (generally referring to electric locomotive), and the element of guideway vehicle is electrically connected to track.Inductively detect described signal, and executive signal process operation is with the fault of qualification based on the signal detected.
Under normal circumstances, the signal detected is particular level.If there is any exception, such as, the poor electric contact due to the track (high resistance) of part infringement or the partial short-circuit (low resistance) of motor, then the described impedance be associated with Orbit revolutionary reflects by the signal detected with or higher amplitudes lower than normal level.
One of the present invention to express more specifically be the method for the fault detecting power track system, and described power track system comprises running rail, electric power supply track, to move along running rail and supplies by electric power the guideway vehicle that track receives electric power.Described method comprises:
The alternating signal generation unit be arranged on described guideway vehicle is used to generate the first alternate electrical signal,
Use be arranged on first on described guideway vehicle inductively unit by described first alternate electrical signal induced emission to the element of described guideway vehicle to produce the second alternate electrical signal in described element, the element of described guideway vehicle is electrically connected to described track;
Use be arranged on second on described guideway vehicle inductively unit with from described second alternate electrical signal induction generation the 3rd alternate electrical signal; With
To executive signal process operation on described 3rd alternate electrical signal, and detection failure thus.
The present invention can also express with the form of the failure detector of locating on guideway vehicle, and is configured to implement described method by generating and process alternate electrical signal.
The method of described proposition is not by the impact of the constraint of velocity of ultrasonic system, and this makes do not disturbing the real-time detection of normal train service scenario lower railway to become possibility.Therefore, any situation of rail fault can be detected in early days before next keeps in repair stroke, and the normal operation not disturbing train to serve.
Alternatively, or in addition, described method can by the special use that checks vehicles, and described vehicle is with the speeds lower than conventional train, therefore, it is possible to the crack that detection is very tiny.
In another example, described method greatly can reduce the maintenance cost of track, avoids great train fault, and increases train reliability of service.If realize the method proposed, train operation business can reduce frequency of maintenance, saves the remarkable manpower in maintenance and expense.In addition, rapid answer is made to avoid the great train fault of the image not only damaging train operation business to the damage of the commitment of track, and the unproductive manpower that rapid answer compensate for the passenger by fault effects is made to the damage of the commitment of track.
Described alternate electrical signal preferably includes the element of at least one frequency in radio frequency (RF) scope.Namely, minimum about 3KHz and the highest about 300GHz.The element of at least one alternate electrical signal (with more preferably, the element of all signals substantially) preferably have and be not less than 300KHz, and preferably not higher than the frequency of 100MHz.Frequency lower than 300KHz is overlapping with electrically operated conversion (switch) harmonic wave.To the frequency higher than more than 100MHz, RF impedance may very large to such an extent as to be difficult to detect the impedance variations caused by rail fault.Described method can be implemented by the device comprising the parts not having movement, is therefore unusual failure-free.
Described element is typically directly electrically connected to collector shoe (namely, do not have IC Intermediate Circuit, this circuit changes voltage in essence), and the electric power from electric power supply track (the 3rd track) collected by described collector shoe.When the 3rd track is connected to high-tension current supply (normally 750V direct current (DC) or higher), described method can be implemented.Induction generation second and the 3rd alternate electrical signal ensure that: the circuit of the circuit and process the 3rd alternate electrical signal that generate the first alternate electrical signal is not directly electrically connected to high-tension current (750V or the higher) system of the 3rd track.This protects circuit from damage (alternatively, if this protection setting has electrical isolation, then may stand dielectric tracking).Also ensure that the electric power safety of the personnel of function circuit.
With existing track unlike, prior art is only to detect the fault of track, because train head in this method is electrically connected to the 3rd track of the part as checked circuit loop, any Novel presentation of train head therefore additionally can also be detected.Like this, this method can the fault of power drive system of detected set trolley or train.
Given train generally has multiple collector shoe (such as, four, each compartment).Alternatively, in each element be connected with each collector shoe in multiple collector shoe separately, the first alternate electrical signal can be used to induction generation second alternate electrical signal.Second alternate electrical signal is used to respond to and generates the 3rd respective alternate electrical signal, and each of these signals can by the impact (such as, according to the order of sequence) of signal processing operations so that the fault of each collector shoe can be detected.
The present invention not only detects the fault of electrification systems in real time, also has the ability distinguishing different faults, and has the ability of the ad-hoc location of locating the 3rd track damaged.
When train moves along railroad track, described circuit monitors the exception of the whole electrification systems of train in real time, comprises collector shoe, electro-motor and the 3rd track.Therefore, the electrification systems of described railroad track ad-hoc location is by the train detection being provided with detection module every a few minutes by process.This will allow the earlier period damage of collector shoe, the 3rd track and electro-motor detected before the inspection of next stroke.
This failure detector can modularization making and be easy to install ON TRAINS.Therefore, described device eliminates the independent demand checked vehicles.This check circuit requires very little physical space and the element of majority is all easy to obtain from market, and this makes this method have higher cost benefit compared with ultrasonic examination.
Changed by some, this method can also detect the exact location of infringement parts under the condition not checking the whole part of track, and described position easily can be accurate to the length of a few km.This can realize by being arranged as the failure detector comprising or be coupled to position detection unit.Described position detection unit can be the revolution counter of global positioning system (GPS) unit and/or train.By this way, embodiments of the invention can locate any fault on the 3rd track, make the maintenance and repair of the 3rd track highly efficient.
Accompanying drawing explanation
Embodiments of the invention will be described to only example with reference to the following drawings, wherein,
Fig. 1 shows the conventional system for the 3rd track receiver voltage by the railway system;
Fig. 2 shows by the generation of eddy current to detect the known device of rail fault;
Fig. 3 shows the first embodiment of the present invention;
Fig. 4 is the assembly drawing of Fig. 4 (a) and Fig. 4 (b), and Fig. 4 (a) and Fig. 4 (b) is respectively (a) FB(flow block) and (b) schematic circuit diagram of the detector of the embodiment of the present invention shown in Fig. 3;
Fig. 5 shows the second embodiment of the present invention;
The data that Fig. 6 shows from the device of the embodiment of the present invention to train controlling center are launched;
Fig. 7 is the schematic diagram of a kind of form of the second embodiment of the present invention; With
Fig. 8 shows the experimental result from prototype of the present invention.
Detailed description of the invention
As shown in Figure 3, be the first embodiment of the present invention.Embodiment is set forth with three main circuit blocks.First circuit module is the circuit module under checking module (" signal injection module "), and it is comprise the system that train and track particularly comprise the 3rd track.Second circuit module is signal injection module, comprise for generating the first alternate electrical signal and being connected to the alternating signal generation unit (" signal source ") of the first inductively unit (" radio frequency (RF) signal injection inductively (inductive-coupling) probe "), described first inductively unit be used for generating the second alternate electrical signal in the element being electrically connected to the 3rd track.Tertiary circuit module is signal receiving module, comprise the second inductively unit (" RF Signal reception is inductively popped one's head in ") and signal processing unit (" detector "), described second inductively unit for responding to generation the 3rd alternate electrical signal.
It is noted that in this embodiment, be electrically connected to a part for the 3rd track and one of them running rail in the element wherein generating the second alternate electrical signal simultaneously.There is cond to prevent direct-current short circuit in signal injection module.
Fig. 4 (a) and Fig. 4 (b) respectively illustrates FB(flow block) and the schematic circuit diagram of detector.Detector comprises: (I) includes the RF signal receiver of inductive coupler coils; (II) is for generating with direct current (DC) signal-V of the amplitude of the 3rd alternate electrical signal for instruction
recrectifier; (III) is by V
recwith two threshold value V
ref1and V
ref2contrast is to generate respective signal V
out1and V
out2comparator; (IV) works as V
out1optical signal is generated when exceeding threshold value, and reversion V
out2and generate the fault indicator of optical signal when this exceeds a predetermined value.
Be illustrated in figure 5 the second embodiment of the present invention, principle shows conventional train traction system.First (negative terminal) of the 3rd track (positive terminal) and two running rails is power by high pressure DC electric power supply (such as, 750V).DC current is back to first of running rail via axle brush.The electric power that the driven by power of train is received from the 3rd track by one or more collector shoe (illustrate only) and first driving track road supplies electric current, and it forms complete circuit loop.The filled arrows of Fig. 5 shows the DC of electric traction circuit to sense of current.
In order to detect the fault (such as, the 3rd track of the collector shoe broken down or damage) of electric traction, RF induction of signal ground injects electric traction circuit, and Injection Signal level is inductively monitored by the acceptor circuit comprising check circuit.
RF signal passes through alternating signal generation unit (" RF signal source ") with the Form generation of the first alternate electrical signal.Alternating signal generation unit be coupled to first inductively unit (magnetic core of signal " inject RF ") for generating the second alternate electrical signal at the element being electrically connected to collector shoe, described collector shoe is connected to the 3rd track successively.The dotted arrow of Fig. 5 shows the second alternate electrical signal and how to flow through the closed circuit comprising train traction system.Cond is connected to axle brush and collector shoe, and provides the return path of RF signal.
Second inductively unit (magnetic core of signal " receive RF ") induction generation the 3rd alternate electrical signal, it is supplied to signal processing unit (" check circuit ").Check circuit comprises trouble detect circuit unit, fault indicator unit and GPS tracing module.
Under normal circumstances, driven by power is connected to the 3rd track by special quality electrical connection, and the 3rd alternate electrical signal has particular level.But, if there is any exception, such as due to the partial short-circuit (causing lower impedance) of the track of partial destruction or the collector shoe (causing higher impedance) of damage or motor and poor electric contact, then the 3rd alternate electrical signal RF signal will be different from its normal level.Once exception be detected, alerting signal will be instructed to and the GPS tracing module of check circuit also will be activated.As shown in Figure 6, GPS check circuit will such as by the wireless launcher train notified control center of check circuit.
In above-mentioned change, although check circuit has wireless launcher always, check circuit receives the incoming signal from train revolution counter instead of GPS tracing module.The particular form of this embodiment shown in Fig. 5 is in shown in Fig. 7.In dotted line, the RF impedance of the element of power drive system will only have faint difference during normal train operation.But, when the 3rd track exists fault (such as, 3rd depression of rail) or collector shoe there is fault (boots broken or break), then can deteriorate to the electrical contact of the 3rd track and can produce higher impedance, this causes the RF signal that receives lower.Impedance variations can be the combination of influence coefficient and electric capacity.
In the second embodiment (as shown in Figure 5), it is to be correlated with railroad track or relevant with the traction generator of train that check circuit can distinguish fault, and generates corresponding alerting signal.If running rail or the 3rd track exist fault, fault indicator only will generate alerting signal at train by having during fault zone of track.The fault zone that has at this track is generated respective alerting signal by the multistage train of Fig. 5 shown type.Thus train controlling center can be warned and safeguard that team is used for keeping in repair the accurate location having failed track of object.
Otherwise if fault is caused by the electro-motor of a collector shoe (or multiple) or train, then alarm indicator will continue always.Subsequently train actuator by warning control center so that particular train is sent to keep in repair.
The real-time monitoring of collector shoe situation is conclusive, because collector shoe trends towards exhausting through after a period of time.Usually, the collector shoe that minority (one or two) is separated may not have any obvious impact to train performance.But, if these collector shoes be separated are not detected in early days, then the further damage of the remaining collector shoe state that will train be caused to enter stop completely, and then cause main train service disruption.
Typically, railway car has four collector shoes: every two, side.Because the 3rd track is in use at any time, thus can only be that the same side in compartment has two collector shoes (such as, when train is toward eastbound sailing, will be two collector shoes of train side, will be two collector shoes of train opposite side when train travels westerly simultaneously).In a form of the present invention, each compartment provides RF signal source and RF signal monitoring circuit.Use RF signal source, RF signal can respond to generation in four compartments being connected to four collector shoes respectively simultaneously, and RF signal monitoring circuit will be received four RF signals in this case and be processed successively them by frequency multiplexing technique, to identify the fault of any one collector shoe.In another form of the present embodiment, RF signal can only be connected to respectively compartment the same side two collector shoes two elements in simultaneously sensed generation, and RF signal monitoring circuit will receive two RF signals in this case, and such as use frequency multiplexing technique process to identify the fault of any one of these two collector shoes.
Proof of Concept
Initial prototype has been developed and has been tested on model railway track and train.As mentioned above, prototype has two main modules: signal injection module and signal receiving module.Signal injection module is implemented together with cond with the induction toroid winding of series connection.RF induction of signal is coupled to track, need not directly electrical contact.Coil is connected with cond, and so that LC resonance frequency and RF s-f match to make, maximum signal power is sensed is coupled to track.
Circuit to be checked is made up of mini track and maneuver modeling train, and circuit as shown in Figure 3.The motor of this model trains receives direct current (DC) by track, and it is connected to direct supply.Mini track, model trains and direct supply simulate true train operation environment.If any portion of track is damaged or motor failure, then impedance variations occurs, and the RF signal level of monitoring is correspondingly different.Use the experimental result of 10MHz RF signal in shown in Fig. 8.As shown in the figure, prototype has the ability of detection 15 Ω to 2.4K Ω impedance variations, and it has enough dynamic ranges to detect the exception of Train electrical traction system.
Signal receiving module inductive coupler coils detects the RF signal be injected into of circuit to be checked.The RF signal received is by circuit for signal conditioning and signal processing circuit process.If the RF signal level be detected exceedes or lower than aforementioned definition level, then respective indicating device is activated.The experimental result of initial prototype demonstrates aforementioned concepts by instruction track is abnormal in real time.
In-place test
In order to determine that described induced RF signal does not affect the normal operation of true train really, under the permission of Singapore metro (SMRT), the train being used in the upper movement of Bishan racing track test tracks (Bishan Depot Test Track) with the form of the embodiment shown in Fig. 7 (being our preferred embodiment at present) on November 19th, 2012 carries out in-place test.As shown in the figure, in order to RF induction of signal is monitored the signal of this induction to the electrification of train, inject and inspect probe and receive coupling probe and be assembled into and be connected on the high voltage direct current cable of collector shoe.
RF signal is generated by signal source, and the pumping circuit of train comprises frequency spectrum analyzer.Signal source and frequency spectrum analyzer are connected to inject and inspect probe respectively and are received coupling probe.At duration of test, use injection probe responds to the 50MHz RF signal at 0dBm (being equal to 1mW) in Electric system, and sensed signal is detected by receiving transducer and is clearly visible on frequency spectrum analyzer.When train steady, the RF signal detected remains unchanged; When train moves, the RF signal detected changes, that is, clearly indicate because the movement of train is in the change of the 3rd contact impedance between track and collector shoe.Test confirms and is not affecting the feasibility monitoring the processing method of the situation of its electrification systems under train normally runs.
Experimentally is about-50dBm (1 × 10 at the electric power of the signal detected of 50MHz
-5mW).For 50 Ω systems, the voltage of induction will be less than 1mV, and it is 117.5dB, and lower than the 750V running voltage of (750000 times are less than) electrification systems, thus this value is too little can not cause arbitrary safety problem.After having seeked advice from SMRT, the existing activation communication frequency used in SMRT system has been 68-88MHz, 380-400MHz, 470-490MHz and 2.45GHz.50MHzRF signal can not fall into any one of these frequency bands, and can not cause any interference of described activation communication frequency.
Bibliography
[1]W.E.Andrew,"Fatal?train?accidents?on?Europe's?railways:1980–2009,"Accident?Analysis?and?Prevention,vol.43,pp.391-401,2011.
[2]Wikipedia.“Classification?of?railway?accidents.”Internet:http://en.wikipedia.org/wiki/Classification_of_railway_accidents.
[3]Wikipedia.“Derailment.”Internet:http://en.wikipedia.org/wiki/Derail?ment.
[4]S.Coccia,R.Phillips,I.Bartoli,S.Salamone,P.Rizzo?and?F.Scalea,“On-Line?High-Speed?Rail?Defect?Detection,Part?II,”Technical?Report,University?of?California-San?Diego,University?of?Pittsburgh.
[5]Federal?Institute?for?Materials?Research?and?Testing.“Eddy?Current?Testing?Methods.”http://www.bam.de/en/kompetenzen/fachabteilungen/abtei?lung_8/fg84/fg84_ag4.htm.
[6]Railway?Technical?Web?Pages.“Electric?Locomotive?Glossary.”Internet:http://www.railway-technical.com/elec-loco-bloc.shtml.
Claims (19)
1. detect a method for electric power railway system fault, the described electric power railway system comprises running rail, electric power supply track and moves and receive the guideway vehicle of the electric power from electric power supply track along described running rail, and described method comprises:
The alternating signal generation unit be arranged on described guideway vehicle is used to generate the first alternate electrical signal,
Use be arranged on first on described guideway vehicle inductively unit by described first alternate electrical signal induced emission to the element of described guideway vehicle to produce the second alternate electrical signal in described element, the element of described guideway vehicle is electrically connected to described track;
Use be arranged on second on described guideway vehicle inductively unit with from described second alternate electrical signal induction generation the 3rd alternate electrical signal; With
To described 3rd alternate electrical signal executive signal process operation, and detection failure thus.
2. method according to claim 1, wherein, described element is electrically connected to described electric power supply track.
3. method according to claim 1 and 2, wherein, described second alternate electrical signal circulates in circuit, and described circuit comprises described running rail further.
4. the method according to aforementioned arbitrary claim, wherein, described second alternate electrical signal circulates in circuit, the collector shoe that described circuit comprises the electric power collected from described electric power supply track, the cond being provided the electro-motor of power, current return path by described electric power and be arranged on described current return path.
5. the method according to aforementioned arbitrary claim, wherein, according to the fault detected, generate report, described report comprises the position obtained by position detection unit.
6. method according to claim 5, wherein, described position detection unit is the revolution counter of GPS unit or described guideway vehicle.
7. the method according to claim 5 or 6, wherein, before described guideway vehicle has stopped moving, described report is launched out described guideway vehicle.
8. the method according to aforementioned arbitrary claim, wherein, described signal processing operations comprises amplitude and the first threshold of contrast the 3rd alternate electrical signal, if described amplitude is lower than described first threshold, generates Fisrt fault detection signal.
9. the method according to aforementioned arbitrary claim, wherein, described signal processing operations comprises amplitude and the Second Threshold of contrast the 3rd alternate electrical signal, if described amplitude is higher than described Second Threshold, generates the second fault detection signal.
10. the method according to aforementioned arbitrary claim, wherein, described first alternate electrical signal is radiofrequency signal.
11. methods according to claim 10, wherein, described first alternate electrical signal comprises the element of frequency in 300KHz to 100MHz scope.
12. 1 kinds for detecting the failure detector of the electric power railway system, the guideway vehicle of electric power that the described electric power railway system comprises running rail, electric power supply track and moves along running rail and receive from electric power supply track, the location of described device on guideway vehicle also comprises:
Alternating signal generation unit, described alternating signal generation unit for generating the first alternate electrical signal,
First inductively unit, described first inductively unit be used for by described first alternate electrical signal induced emission to described guideway vehicle, the element that is electrically connected to described track, to produce the second alternate electrical signal in described element;
Second inductively unit, described second inductively unit be used for responding to generation the 3rd alternate electrical signal by described second alternate electrical signal; With
Signal processing unit, described signal processing unit is used for described 3rd alternate electrical signal executive signal process operation, detection failure thus.
13. devices according to claim 12, have report generation unit, and described report generation unit generates report according to the described signal processing unit of detection failure, and described report comprises the position obtained by position detection unit.
14. devices according to claim 13, comprise the described position detection unit of GPS unit or revolution counter form.
15., according to claim 12 to 14 arbitrary described devices, comprise projector further, and described projector is used for report wireless transmission to go out described guideway vehicle.
16. according to claim 12 to 15 arbitrary described devices, and wherein, described signal processing unit is arranged to the amplitude and first threshold that contrast described 3rd alternate electrical signal, if described amplitude is lower than described first threshold, then generates Fisrt fault detection signal.
17. according to claim 12 to 16 arbitrary described devices, and wherein, described signal processing unit is set to the amplitude and the Second Threshold that contrast described 3rd alternate electrical signal, if described amplitude is higher than described Second Threshold, then generates the second fault detection signal.
18. according to claim 12 to 17 arbitrary described devices, and wherein, described alternating signal generation unit is operating as and generates described first alternate electrical signal as radiofrequency signal.
19. devices according to claim 18, wherein, described radiofrequency signal comprises the element of frequency in 300KHz to 100MHz scope.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261636980P | 2012-04-23 | 2012-04-23 | |
| US61/636,980 | 2012-04-23 | ||
| PCT/SG2013/000163 WO2013162472A1 (en) | 2012-04-23 | 2013-04-23 | Method and apparatus for detecting railway system defects |
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| Publication Number | Publication Date |
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| CN104254472A true CN104254472A (en) | 2014-12-31 |
| CN104254472B CN104254472B (en) | 2016-12-14 |
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| CN201380021342.5A Active CN104254472B (en) | 2012-04-23 | 2013-04-23 | The method and apparatus of detection railway system fault |
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| Country | Link |
|---|---|
| CN (1) | CN104254472B (en) |
| SG (1) | SG11201405197WA (en) |
| WO (1) | WO2013162472A1 (en) |
Cited By (4)
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| CN107709134A (en) * | 2015-07-01 | 2018-02-16 | 株式会社东芝 | Control apparatus for electric railcar |
| CN110705729A (en) * | 2019-10-14 | 2020-01-17 | 中国铁道科学研究院集团有限公司通信信号研究所 | Fault detection method and device for track power supply system, server and storage medium |
| CN111208354A (en) * | 2018-11-20 | 2020-05-29 | 通用汽车环球科技运作有限责任公司 | Vehicle electronics high resistance fault detection and isolation |
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| LT3495230T (en) * | 2017-12-08 | 2022-04-25 | Thales Management & Services Deutschland Gmbh | Train control network, method for communication and method for controlling train integrity |
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| ES2974765T3 (en) * | 2019-11-19 | 2024-07-01 | Alstom Holdings | System, method and railway vehicle to monitor a third rail system of a railway line |
| CN114330429A (en) * | 2021-12-21 | 2022-04-12 | 中国国家铁路集团有限公司 | Steel rail scratch recognition method, device, system, equipment and storage medium |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104254472B (en) | 2016-12-14 |
| SG11201405197WA (en) | 2014-09-26 |
| WO2013162472A1 (en) | 2013-10-31 |
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