Utility model content
The utility model embodiment provides a kind of detection means of the rail vehicle system failure, there is provided one kind can be carried in timeFor the physical state of bus, and the scheme of accurate detection is provided for bus failure.
The utility model provides a kind of detection means of the rail vehicle system failure, including：
Pumping signal dispensing device and pumping signal reception device；
The pumping signal dispensing device is connected to one end of the bus of rail vehicle system, for generating pumping signal,And the bus that the pumping signal passed through into voltage superposition mode injection orbit Vehicular system；
The pumping signal reception device is connected to the other end of the bus of rail vehicle system, for obtaining the trackThe signal of vehicular system output judges whether the detection signal meets default fault detect condition as detection signal；If so, then the pumping signal reception device sends early warning information, the early warning information is used to indicate the rail vehicle systemThere is failure.
Optionally, the rail vehicle system includes control unit for vehicle and human-machine interface unit；The pumping signal connectsReceiving apparatus are specifically for the early warning information is sent to the control unit for vehicle and the human-machine interface unit.
Optionally, the pumping signal reception device includes：Filter unit, AD conversion unit, Digital Signal Processing listUnit；
The input of the filter unit is connected with the bus of the rail vehicle system, the output end of the filter unitInput with the AD conversion unit is connected；The output end of the AD conversion unit and the digital signal processing unitInput；
The filter unit is used to obtain the detection signal, and the AD conversion unit is used to enter the detection signalRow analog-to-digital conversion；The digital signal processing unit is used to judge whether the detection signal meets default fault detect barPart, determines that the rail vehicle system whether there is failure.
Optionally, the digital signal processing unit is specifically for every with what is prestored by the waveform of the detection signalThe waveform for planting fault type carries out contrast treatment；If there is the waveform of at least one Fisrt fault and the waveform of the detection signalMatching, it is determined that the rail vehicle system has Fisrt fault；Wherein, the fault detect condition includes every kind of fault typeWaveform.
Optionally, the digital signal processing unit specifically for：
Determine the amplitude of the detection signal whether less than predetermined amplitude threshold value；If, it is determined that the rail vehicle systemCable transmission exception in system；
And/or,
Determine whether include the pumping signal in the detection signal, excitation is believed if not including in the detection signalNumber, it is determined that there is open circuit or short trouble in the rail vehicle system.
Optionally, the pumping signal dispensing device includes monitoring bus unit and excitation signal generation unit；It is described totalLine monitoring unit is used for the signal transmission situation of monitoring bus in real time and triggers that excitation signal generation unit generation is described to swashEncourage signal.
The detection means of the rail vehicle system failure that the utility model embodiment is provided, by pumping signal dispensing deviceGeneration pumping signal, and pumping signal is injected the bus of Vehicular system, pumping signal reception device by voltage superposition modeDetection signal is received by the bus of Vehicular system, and judges whether the detection signal meets default fault detect condition；If so, then the pumping signal reception device sends early warning information, the early warning information is used to indicate the rail vehicle systemThere is failure, analyzing and processing in real time can be done to the detection signal for gathering, the physical state of bus is provided in time, and for busFailure can in time find and remind treatment.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearerAccompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodimentThe embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility modelExample, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged toThe scope of the utility model protection.
The structural representation of the detection means example one of the rail vehicle system failure that Fig. 1 is provided for the utility model embodimentFigure, as shown in figure 1, the detection means of the rail vehicle system failure, including：Pumping signal dispensing device A and pumping signal connectReceiving apparatus B；The pumping signal dispensing device A is connected to one end of the bus of rail vehicle system, for generating pumping signal,And the bus that the pumping signal passed through into voltage superposition mode injection orbit Vehicular system；The pumping signal reception device BThe other end of the bus of rail vehicle system is connected to, the signal for obtaining the rail vehicle system output is believed as detectionNumber, and judge whether the detection signal meets default fault detect condition；If so, then the pumping signal reception device is sent outSending early warning information, the early warning information is used to indicate the rail vehicle system to there is failure.
During concrete application, the rail vehicle system refers specifically to rail vehicle network communicating system, at least includesControl unit for vehicle and human-machine interface unit；The pumping signal reception device B can be sent to the vehicle early warning informationControl unit and the human-machine interface unit are shown, so that train operator or attendant check.
Optionally, in a kind of specific implementation, the pumping signal dispensing device A includes the He of monitoring bus unit 11Excitation signal generation unit 12；The monitoring bus unit 11 is used for the signal transmission situation of monitoring bus in real time and triggers describedExcitation signal generation unit 12 generates the pumping signal.
The pumping signal reception device B includes：Filter unit 13, AD conversion unit 14, digital signal processing unit15；The input of the filter unit 13 is connected with the bus of the rail vehicle system, the output end of the filter unit 13Input with the AD conversion unit is connected；The output end of the AD conversion unit 14 and the Digital Signal Processing listThe input of unit 15；
The filter unit 13 is used to obtain the detection signal, and the AD conversion unit 14 is used for the detection letterNumber carry out analog-to-digital conversion；The digital signal processing unit 15 is used to judge whether the detection signal meets default failure inspectionSurvey condition, determines that the rail vehicle system whether there is failure.
Specifically, the digital signal processing unit 15 specifically for by the waveform of the detection signal with prestoreThe waveform of every kind of fault type carries out contrast treatment；If there is the waveform of at least one Fisrt fault and the ripple of the detection signalShape is matched, it is determined that the rail vehicle system has Fisrt fault；Wherein, the fault detect condition includes every kind of failure classesThe waveform of type.
The digital signal processing unit 15 specifically for：Determine the amplitude of the detection signal whether less than predetermined amplitudeThreshold value；If, it is determined that the cable transmission exception in the rail vehicle system；And/or, determine in the detection signal whetherIncluding the pumping signal, if not including pumping signal in the detection signal, it is determined that occur in the rail vehicle systemOpen circuit or short trouble.
The detection means of the rail vehicle system failure that the present embodiment is provided, pumping signal dispensing device A produces specificPumping signal, is injected into MVB by way of superimposed voltage, through MVB cable transmission after, by pumping signal receiveDevice B is acquired treatment to signal, and (open circuit, short circuit, contact are not to judge bus physical state according to the waveform analysis for receivingIt is good etc.), and the physical state of bus is offered control unit for vehicle in real time by process data, that is, above-mentioned early warning informationOr human-machine interface unit, to point out department to multiply and maintenance personal, the physical state of bus is provided in time, and for bus failure energyIt is enough to find in time and remind treatment.
The structural representation of the example of detection means one of the rail vehicle system failure that Fig. 2 is provided for the utility model embodimentFigure, on the basis of above-described embodiment one, in implementing, the monitoring bus unit 11 in pumping signal dispensing device A(21) and excitation signal generation unit 12 (22) can produce specific pumping signal according to bus case, and by rail vehicleTo reception device B treatment, in pumping signal reception device B, filter unit 13 can be implemented as the bus transfer of systemMethod filter circuit 23, for example：Amplifilter；AD conversion unit 14 can be realized by A/D chip 24, at data signalReason unit 15 can be realized by central processing unit (Central Processing Unit, CPU), to the detection letter for receivingNumber treatment is analyzed, judges whether rail vehicle system breaks down, treatment is tied finally by early warning information display deviceFruit is shown that the early warning information display device can be a part for the detection means of the above-mentioned rail vehicle system failure,Can be vehicle display device in itself, this utility model is not limited.
On the basis of said apparatus embodiment, below to the concrete application of the detection means of the rail vehicle system failureProcess is illustrated.
The flow chart of the detection method example one of the rail vehicle system failure that Fig. 3 is provided for the utility model embodiment,As shown in figure 3, the detection method of the rail vehicle system failure is applied in the detection means shown in above-mentioned Fig. 1 and Fig. 2, specificallyStep of realizing be：
Step S101, pumping signal dispensing device generation pumping signal, and the pumping signal is passed through into voltage superposition sideThe bus of formula injection orbit Vehicular system.
In this step, pumping signal dispensing device produces specific excitation according to the real-time detection to rail vehicle busSignal, and be injected into by way of superimposed voltage in rail vehicle bus, i.e., in MVB, it is connected in the MVB eachThe control unit of individual subsystem, if there is the failures such as open circuit or short circuit on circuit, pumping signal reception device can lead toThe detection signal for receiving is crossed to be determined.
Step S102, pumping signal reception device receives detection signal by the bus of rail vehicle system.
Step S103, the pumping signal reception device judges whether the detection signal meets default fault detect barPart.
In this programme, the detection signal of bus output can be obtained in pumping signal reception device side real-time detection, and it is rightDetection signal is analyzed treatment, if each control unit for generally being connected in bus is normally run, necessarilyPumping signal input after, the detection signal for receiving can get in normal work, if receive detection letterDo not met when number with normal work, then it is assumed that circuit is faulty or abnormal, i.e., can be with excitation information reception devicePre-set different fault detect conditions, detection signal when can be with normal work contrasted, or withDetection signal during certain failure is contrasted, and bus can be determined with the presence or absence of failure by this kind of mode, or existFault type.
Optionally, pumping signal reception device judges whether the detection signal meets default fault detect in the stepCondition at least includes following several implementations：
The first implementation, the waveform of the detection signal is carried out with the waveform of the every kind of fault type for prestoringContrast is processed；If there is the waveform of at least one Fisrt fault and the Waveform Matching of the detection signal, it is determined that the trackThere is Fisrt fault in Vehicular system；Wherein, the fault detect condition includes the waveform of every kind of fault type.
Whether second implementation, determine the amplitude of the detection signal less than predetermined amplitude threshold value；If, it is determined thatCable transmission exception in the rail vehicle system.
Whether the third implementation, determines include the pumping signal in the detection signal, if the detection signalIn not include pumping signal, it is determined that in the rail vehicle system occur open circuit or short trouble.
Above-mentioned several ways can be used alone can also be without limitation while use.
Step S104, if so, then the pumping signal reception device sends early warning information, the early warning information is used to indicateThere is failure in the rail vehicle system.
Through the above way, when pumping signal reception device determines that the bus of rail vehicle system has failure, canThe early warning information for obtaining is sent with to man-machine interface or other display devices or early warning device；The early warning information canIncluding specific fault type, it is also possible to only include the prompting that there is failure.
On the basis of the method, name an instantiation and the method is illustrated.
The detection method application schematic diagram of the rail vehicle system failure that Fig. 4 is provided for the utility model embodiment.Such as Fig. 4Shown, MVB, as vehicle bus, is the transport vehicle that monitoring and diagnostic data are provided for train；General train connectionSubsystems control unit on to MVB includes：Control unit for vehicle (Vehicle control unit, VCU), leadDraw control unit (Traction controll unit, TCU), brak control unit (Brak control unit, BCU), auxiliaryHelp control unit (Auxiliary controll unit, ACU), conditioning control unit (Heating, Ventilation andAir Conditioning, HVAC), pyrotechnics alarm unit (Fire Alarm Unit, FAU) etc..It is all of with processing unitSubsystem all by MVB interface access vehicle network.
Subsystems are all accessed in the MVB networks of bus-type.Pumping signal dispensing device wherein of the present utility model andPumping signal reception device is separately mounted to the two ends of bus.Pumping signal dispensing device A produces specific pumping signal, passes throughThe mode of superimposed voltage is injected into MVB, through MVB cable transmission after, signal is carried out by pumping signal reception device BAcquisition process, bus physical state (open circuit, short circuit, loose contact etc.) is judged according to the waveform analysis for receiving, and busPhysical state VCU and human-machine interface unit (Human Machine Interface, HMI) are offered by process data in real time,Multiplied with prompting department and maintenance personal.
The excitation signal waveforms that pumping signal dispensing device A is produced have following features：
A), pumping signal is pulse signal, and signal level voltage magnitude is MVB lowest threshold voltage 1.2V to the maximum,(may then be specified in IEC61375-1, MVB nodes receive threshold value and are by other bus node equipment misrecognition more than this voltage1.2V, i.e., when test signal differential voltage is more than or equal to 1.2V, receiver identification signal is 1；When the differential electrical of test signalWhen pressure is less than 1.2V, receiver will not receive data frame).
B), the pulse width tw of the pumping signal is 1/4 times of MVB bit wide BT, as 333ns；
C), the pulse period of the pumping signal is that T is MVB maximum 1024ms eigenperiod；
D), pumping signal dispensing device has bus monitoring function, in real time the signal level on monitoring physical bus, when totalTriggering produces interference signal when line is idle, does not disturb the purpose of the transmission of normal data in bus up to road.
Pumping signal reception device B is main by filter unit (amplification filter unit), analog-to-digital conversion (analogue-to-Digital conversion, A/D) composition such as unit, signal processing unit, prewarning unit.
Pumping signal reception device has following features：
A), pumping signal reception device can be by A/D chip Real-time Collection signal, the voltage waveform in collection vehicle bus；
B), when the amplitude of the detection signal of reception channel is less than 1V, then it is judged as cable transmission exception；
C), when the detection signal of pumping signal generation is not received, then it is judged as that bus occurs open circuit or short circuit；
D), pumping signal reception device B is in itself the node in a bus, can be the state of bus by agreementThe main equipment interaction bus state of data protocol and MVB；Such that it is able to the physical state of bus is sent out by vehicle busTrain supervision screen is given to be checked for driver or attendant.
By judging bus physical state (open circuit, short circuit, loose contact etc.) according to the waveform analysis for receiving, and totalThe physical state of line offers VCU and/or HMI in real time by process data, to point out department to multiply and maintenance personal, bus is provided in timePhysical state, and can in time be found for bus failure and remind treatment.
In the embodiment of said apparatus or method, it should be appreciated that signal processing unit can be embodied in methods that a kind of placeReason device, the processor can be CPU (English：Central Processing Unit, referred to as：CPU), can be withIt is other general processors, digital signal processor (English：Digital Signal Processor, referred to as：DSP it is), specialIntegrated circuit (English：Application Specific Integrated Circuit, referred to as：ASIC) etc..General processorCan be microprocessor or the processor can also be any conventional processor etc..With reference to the utility model embodiment, institute is publicThe step of method opened, can be embodied directly in hardware processor and perform completion, or with the hardware and software module in processorCombination performs completion.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead toThe related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journeySequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：Read-only storage (EnglishText：Read-only memory, abbreviation：ROM), RAM, flash memory, hard disk, solid state hard disc, tape (English：magneticTape), floppy disk (English：Floppy disk), CD (English：Optical disc) and its any combination.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limitedSystem；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art shouldUnderstand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or wholeTechnical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newlyThe scope of each embodiment technical scheme of type.