CN107024921A - MVB failure simulation device - Google Patents
MVB failure simulation device Download PDFInfo
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- CN107024921A CN107024921A CN201710272773.9A CN201710272773A CN107024921A CN 107024921 A CN107024921 A CN 107024921A CN 201710272773 A CN201710272773 A CN 201710272773A CN 107024921 A CN107024921 A CN 107024921A
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- 238000005516 engineering process Methods 0.000 description 3
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- Electric Propulsion And Braking For Vehicles (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
The present invention provides a kind of MVB failure simulation device, including：Short interruption simulated assembly, interference signal simulated assembly and selecting switch；The input of the short interruption simulated assembly is used to be connected with MVB, and the output end of the short interruption simulated assembly is connected with an input of the selecting switch；The interference signal simulated assembly has first input end and the first output end, and the first input end is used to be connected with MVB；First output end is connected with another input of the selecting switch；The output end of the selecting switch is used to be connected with MVB.The MVB failure simulation device that the present invention is provided is capable of the failure of simulation multifunctional vehicle bus, is tested with the antijamming capability to MVB equipment.
Description
Technical field
The present invention relates to MVB technology, more particularly to a kind of MVB failure simulation device.
Background technology
MVB (Multifunction Vehicle Bus, referred to as：MVB it is) the one of TCN
Part, has the advantages that fast response time.It is connected on train using the MVB each equipment communicated on MVB, forms MVB networks.
Data frame when MVB communicates includes prime frame and the prime frame for carrying address information is sent from the main equipment in frame, MVB networks, if
The slave unit of corresponding address information is replied from frame within a certain period of time, then completes a MVB communications.
In the process of running, MVB networks are often disturbed train by the external world, such as when train driving is to high pressure
When in the environment of electricity, if MVB prime frame or being interfered from frame and can produce error code, and then cause communication failure, therefore, be arranged on
MVB equipment on train must have stronger fault-tolerant ability, to ensure that MVB communications are normal.Because extraneous interference does not have
Certain rule, therefore the problem tested always in the industry of the antijamming capability to MVB equipment.
The content of the invention
The present invention provides a kind of MVB failure simulation device, the event for simulation multifunctional vehicle bus
Barrier, is tested with the antijamming capability to MVB equipment.
The present invention provides a kind of MVB failure simulation device, including：Short interruption simulated assembly, interference letter
Number simulated assembly and selecting switch；
The input of the short interruption simulated assembly is used to be connected with MVB, the short interruption simulation
The output end of component is connected with an input of the selecting switch；
The interference signal simulated assembly has a first input end and the first output end, the first input end be used for it is many
Function vehicle bus is connected；First output end is connected with another input of the selecting switch；
The output end of the selecting switch is used to be connected with MVB.
MVB failure simulation device as described above, the short interruption simulated assembly includes：First opens
Close, second switch and the 3rd is switched；
The first switch is connected between the input of the short interruption simulated assembly and output end；
One end of the second switch is used to receive high level signal, and the other end is defeated with the short interruption simulated assembly
Go out end to be connected；
One end of 3rd switch is used to be grounded, and the other end is connected with the output end of the short interruption simulated assembly.
MVB failure simulation device as described above, the short interruption simulated assembly also includes：4th
Switch and first resistor；
One end of the first resistor is used to receive high level signal, and the other end is connected with one end of the described 4th switch；
The other end of 4th switch is connected with the output end of the short interruption simulated assembly.
MVB failure simulation device as described above, the short interruption simulated assembly also includes：5th
Switch and second resistance；
One end of the second resistance is connected with the output end of the short interruption simulated assembly, the other end and the 5th switch
One end be connected；The other end of 5th switch is used to be grounded.
MVB failure simulation device as described above, the short interruption simulated assembly also includes：6th
Switch；
One end of 6th switch is connected with the output end of the short interruption simulated assembly, and the other end is more with another
The output end of short interruption simulated assembly in function vehicle bus failure simulation device is connected.
MVB failure simulation device as described above, the short interruption simulated assembly also includes：7th
Switch and 3rd resistor；
After 7th switch and 3rd resistor series connection, the two ends of the 6th switch are connected in parallel on.
MVB failure simulation device as described above, the interference signal simulated assembly includes：Connect successively
Analog-digital converter, signal processor and the digital analog converter connect, the input of the analog-digital converter be used for it is described first defeated
Enter end to be connected, for receiving MVB signal；The output end of the digital analog converter is used for and the described first output
End is connected, and the signal processor is used to handle the MVB signal after analog-to-digital conversion to form the
One interference signal.
MVB failure simulation device as described above, the signal processor is field programmable gate array
FPGA。
MVB failure simulation device as described above, the interference signal simulated assembly is also defeated with second
Enter end, the second input of the interference signal simulated assembly is used to be connected with signal generator, for receiving the signal hair
The second interference signal that raw device is produced；
The interference signal simulated assembly also includes operational amplifier, the first input end and digital-to-analogue of the operational amplifier
The output end of converter is connected, and the second input of the operational amplifier is connected with second input, and the computing is put
The output end of big device is connected with first output end, and the operational amplifier is used to believe the first interference signal with the second interference
The 3rd interference signal is produced after number being overlapped.
MVB failure simulation device as described above, the interference signal simulated assembly also includes：Signal
Conditioner, the signal conditioner is connected between the analog-digital converter and the first input end.
The technical scheme that the present invention is provided, is produced by using short interruption simulated assembly for simulation multifunctional vehicle bus
Raw short circuit or open circuit fault, its input are connected with MVB, and using interference signal simulated assembly for simulating
The failure produced when MVB is interfered, its first input end is connected with MVB；And use
Selecting switch, the output end and interference signal simulated assembly of two inputs of selecting switch respectively with short interruption simulated assembly
The first output end be connected, the fault-signal produced by one of component is supplied to MVB, it is many to simulate
Function vehicle bus produces the state of failure, and then is tested for the antijamming capability to MVB networks or MVB equipment.
Brief description of the drawings
Fig. 1 is the structural representation for the MVB failure simulation device that the embodiment of the present invention one is provided；
Fig. 2 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention two is provided
Structural representation；
Fig. 3 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention three is provided
Structural representation；
Fig. 4 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention four is provided
Structural representation；
Fig. 5 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention five is provided
Structural representation；
Fig. 6 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention six is provided
Structural representation；
Fig. 7 is interference signal simulated assembly in the MVB failure simulation device that the embodiment of the present invention seven is provided
Structural representation；
Fig. 8 is interference signal simulated assembly in the MVB failure simulation device that the embodiment of the present invention eight is provided
Structural representation.
Reference：
1- short interruption simulated assemblies；11- first switches；12- second switches；
13- the 3rd is switched；14- the 4th is switched；15- the 5th is switched；
16- the 6th is switched；17- the 7th is switched；101- first resistors；
102- second resistances；103- 3rd resistors；2- interference signal simulated assemblies；
21- analog-digital converters；22- signal processors；23- digital analog converters；
24- operational amplifiers；3- selecting switch；4- MVBs；
5- signal generators.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment one
Fig. 1 is the structural representation for the MVB failure simulation device that the embodiment of the present invention one is provided.Such as Fig. 1
Shown, the present embodiment provides a kind of MVB failure simulation device, including：Short interruption simulated assembly 1, interference letter
Number simulated assembly 2 and selecting switch 3.
Wherein, the input of short interruption simulated assembly 1 is used to be connected with MVB 4, short interruption simulation
The output end of component 1 is connected with an input of selecting switch 3.Short interruption simulated assembly 1 can produce short circuit or open circuit letter
Number there is provided to MVB 4, short circuit or open circuit fault for simulation multifunctional vehicle bus 4.
Interference signal simulated assembly 2 has first input end and the first output end, and first input end is used for and MPV
Bus 4 is connected, and the first output end is connected with another input of selecting switch 3.Interference signal simulated assembly 2 can produce dry
Signal is disturbed there is provided to MVB 4, produced failure when being interfered for simulation multifunctional vehicle bus 4.
The output end of selecting switch 3 is used to be connected with MVB 4, and selecting switch 3 can be in short interruption mould
Intend selecting one, and the signal output that the component chosen is provided in component 1 and interference signal simulated assembly 2, it is many to simulate
Produced failure when function vehicle bus 4 is short-circuit, breaking or is interfered.
It should be noted that in the present embodiment, MVB failure simulation device is to be connected on MPV
In bus, MVB failure simulation device can be connected by MVB with others MVB equipment.
The technical scheme that the present embodiment is provided, is used for simulation multifunctional vehicle total by using short interruption simulated assembly 1
Line 4 produces short circuit or open circuit fault, and its input is connected with MVB 4, and is used using interference signal simulated assembly 2
The failure produced when simulation multifunctional vehicle bus 4 is interfered, its first input end is connected with MVB 4；
And use selecting switch 3, two inputs of selecting switch 3 output end respectively with short interruption simulated assembly 1 and interference
First output end of signal imitation component 2 is connected, and the fault-signal produced by one of component is supplied into multifunctional vehicle
Bus 4, the state of failure is produced with simulation multifunctional vehicle bus 4, and then for the anti-interference of MVB networks or MVB equipment
Ability is tested.
Embodiment two
The present embodiment is on the basis of embodiment one, MVB failure simulation device to be carried out further
Optimization, especially the implementation to short interruption simulated assembly 1 is further optimized.
The function of short interruption simulated assembly 1 is that simulation multifunctional vehicle bus 4 produces short circuit or open circuit fault signal, then
Those skilled in the art can design a variety of circuit structures, to realize its function.The present embodiment provides a kind of specific implementation,
The scheme that those skilled in the art directly can be provided using the present embodiment, can also be repaiied to the scheme that the present embodiment is provided
Change to obtain other schemes.
Fig. 2 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention two is provided
Structural representation.As shown in Fig. 2 short interruption simulated assembly 1 includes：First switch 11, second switch 12 and the 3rd are switched
13。
Wherein, first switch 11 is connected between the input of short interruption simulated assembly 1 and output end, works as first switch
11 closures, then be connection between the input and output end of short interruption simulated assembly 1；It is when first switch 11 disconnects, then short
To disconnect between the input and output end of road open circuit simulated assembly 1, can simulation multifunctional vehicle bus 4 occur it is breaking therefore
Barrier.
One end of second switch 12 is used to receive high level signal VCC, the output of the other end and short interruption simulated assembly 1
End is connected.When second switch 12 is closed, then the output end of short interruption simulated assembly 1 is connected with high level signal VCC, can be simulated
The signal of MVB 4 occurs to power supply short circuit failure.
One end of 3rd switch 13 is used to be grounded, and the other end is connected with the output end of short interruption simulated assembly 1.When the 3rd
Switch 13 is closed, then the output head grounding of short interruption simulated assembly 1, can the signal of simulation multifunctional vehicle bus 4 occur pair
Ground short circuit failure.
The operation principle of above-mentioned MVB failure simulation device is：
Selecting switch 3 is connected with short interruption simulated assembly 1.
(1) switch of second switch 12 and the 3rd 13 is disconnected, and first switch 11 is disconnected, available for simulation multifunctional car
Open circuit fault occurs for bus 4.
(2) switch of first switch 11 and the 3rd 13 is disconnected, and second switch 12 is closed, available for simulation multifunctional car
The signal of bus 4 occurs to power supply short circuit failure.
(3) first switch 11 and second switch 12 are disconnected, and the 3rd switch 13 is closed, available for simulation multifunctional car
Shorted to earth failure occurs for the signal of bus 4.
Embodiment three
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to short interruption simulated assembly 1 further optimized.
Fig. 3 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention three is provided
Structural representation.As shown in figure 3, short interruption simulated assembly 1 also includes：4th switch 14 and first resistor 101.
Wherein, one end of first resistor 101 is used for the one end for receiving high level signal VCC, the other end and the 4th switch 14
It is connected, the other end of the 4th switch 14 is connected with the output end of short interruption simulated assembly 1.It can be appreciated that：First resistor
After 101 connect with the 4th switch 14, then it is in parallel with second switch 12.
First switch 11, the switch of second switch 12 and the 3rd 13 are disconnected, and the 4th switch 14 is closed, then short interruption
The output end of simulated assembly 1 is connected by first resistor 101 with high level signal VCC, for simulation multifunctional vehicle bus 4
Signal occurs to hinder short trouble to high band.
Example IV
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to short interruption simulated assembly 1 further optimized.
Fig. 4 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention four is provided
Structural representation.As shown in figure 4, short interruption simulated assembly 1 also includes：5th switch 15 and second resistance 102.
Wherein, one end of second resistance 102 is connected with the output end of short interruption simulated assembly 1, and the other end is opened with the 5th
The one end for closing 15 is connected, and the other end of the 5th switch 15 is used to be grounded.It can be appreciated that：Second resistance 102 and the 5th is switched
After 15 series connection, then it is in parallel with the 3rd switch 13.
Above-mentioned first switch 11, the switch 14 of the switch of second switch the 12, the 3rd 13 and the 4th are disconnected, and switch 15 by the 5th
Closure, then the output end of short interruption simulated assembly 1 is grounded by second resistance 102, for simulation multifunctional vehicle bus 4
Signal occurs to hinder short trouble to area.
Embodiment five
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to short interruption simulated assembly 1 further optimized.
Fig. 5 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention five is provided
Structural representation.As shown in figure 5, short interruption simulated assembly 1 also includes：6th switch 16.
One end of 6th switch 16 is connected with the output end of short interruption simulated assembly 1, and the other end is multi-functional with another
The output end of short interruption simulated assembly 1 in vehicle bus failure simulation device is connected.
For the communication mode of MVB 4, in order to improve fault-tolerant ability, a redundancy can be set total in addition
Connected between line, two MVB equipment by two lines road, for example：A roads and B roads.In default situations, MVB networks pass through A roads
Data are transmitted, when open circuit occur in A roads or signal is abnormal, B roads is switched to and is transmitted data.
Then the 6th switch 16 is exactly to be connected between two MVBs, namely is connected between A roads and B roads.
When first switch, the switch 14 of the switch of second switch the 12, the 3rd the 13, the 4th and the 5th switch 15 disconnect, the 6th switch 16 is closed
When, the output end of the short interruption simulated assembly 1 in two MVB failure simulation devices is connected, available for mould
Intend short trouble between MVB signals.
In Fig. 5, the MVB failure simulation device being connected in A roads and B roads can be identical knot
Structure.In order to give top priority to what is the most important, for the MVB failure simulation device being connected in B roads, short interruption simulated assembly 1
First switch 11 is only remained, remaining switch is omitted.
Embodiment six
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to short interruption simulated assembly 1 further optimized.
Fig. 6 is short interruption simulated assembly in the MVB failure simulation device that the embodiment of the present invention six is provided
Structural representation.As shown in fig. 6, short interruption simulated assembly 1 also includes：7th switch 17 and 3rd resistor 103.
Wherein, after the 7th switch 17 and 3rd resistor 103 are connected, the two ends of the 6th switch 16 are connected in parallel on.It can also manage
Solve after the 7th switch 17 and the series connection of 3rd resistor 103, to be connected in two MVB failure simulation devices
Between the output end of short interruption simulated assembly 1.
When first switch, the switch 15 of the 13, the 4th switch of the switch of second switch the 12, the 3rd the 14, the 5th and the 6th switch 16 break
Open, when the 7th switch 17 is closed, the output of the short interruption simulated assembly 1 in two MVB failure simulation devices
End is connected by 3rd resistor 103, available for band resistance short trouble between simulation MVB signals.
In Fig. 6, the MVB failure simulation device being connected in A roads and B roads can be identical knot
Structure.In order to give top priority to what is the most important, for the MVB failure simulation device being connected in B roads, short interruption simulated assembly 1
First switch 11 is only remained, remaining switch is omitted.
The technical scheme used with reference to above-mentioned six embodiments, above-mentioned MVB failure simulation device can
The signal open circuit fault of simulation multifunctional vehicle bus 4, signal to power supply short circuit failure, signal shorted to earth failure, signal it
Between short trouble, the resistance of signal band hinder power supply short circuit failure, signal band band resistance short circuit between shorted to earth failure and signal therefore
Barrier.
By using above-mentioned short interruption simulated assembly 1 short circuit or open circuit event are produced for simulation multifunctional vehicle bus 4
Barrier, its input is connected with MVB 4, and total for simulation multifunctional vehicle using interference signal simulated assembly 2
The failure that line 4 is produced when being interfered, its first input end is connected with MVB 4, and using selecting switch 3,
Two inputs of selecting switch 3 respectively with the output end of short interruption simulated assembly 1 and interference signal simulated assembly 2 first
Output end is connected, and the fault-signal produced by one of component is supplied into MVB 4, with simulation multifunctional car
Bus 4 produces the state of failure, and then is tested for the antijamming capability to MVB networks or MVB equipment.
Embodiment seven
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to interference signal simulated assembly 2 further optimized.
The function of interference signal simulated assembly 2 is that simulation multifunctional vehicle bus 4 produces signal interference fault-signal, example
Such as：Noise jamming, signal delay etc..Then those skilled in the art can design a variety of circuit structures, to realize its function.This reality
Apply example and a kind of specific implementation is provided, the scheme that those skilled in the art directly can be provided using the present embodiment can also
The scheme that the present embodiment is provided is modified to obtain other schemes.
Fig. 7 is interference signal simulated assembly in the MVB failure simulation device that the embodiment of the present invention seven is provided
Structural representation.As shown in fig. 7, interference signal simulated assembly 2 includes：Analog-digital converter 21, the signal transacting being sequentially connected
Device 22 and digital analog converter 23.
Wherein, the input of analog-digital converter 21 is used to be connected with the first input end of interference signal simulated assembly 2, and then
It is connected with MVB 4, for receiving MVB signal.Analog-digital converter 21 is used for many of analog quantity
Function vehicle bus signal is converted to digital quantity.
The output end of digital analog converter 23 be used for be connected with the first output end of interference signal simulated assembly 2, and then with it is many
Function vehicle bus 4 is connected.Digital analog converter 23 is used to the MVB signal of digital quantity being converted to analog quantity.
Signal processor 22 is connected between analog-digital converter 21 and digital analog converter 23, for after analog-to-digital conversion
MVB signal handled to form the first interference signal, for example the MVB of digital quantity is believed
Number be overlapped, postpone, the operation such as luffing, to form the first interference signal.First interference signal is exported after digital-to-analogue conversion again.
Signal processor 22 specifically can be using field programmable gate array (Field-Programmable Gate Array, abbreviation：
FPGA above-mentioned functions are realized).
It is above-mentioned that operation is overlapped to MVB signals, it is specially that DC quantity, frequency quantity letter are superimposed on the MVB signals of input
Number, other signals of noise signal machine etc..Delay operation is carried out to MVB signals, is specially after MVB signal delay certain times
Output.Luffing operation is carried out to MVB signals, is specially that the amplitude for inputting MVB signals is adjusted, for example fixed proportion contracts
Put.
The technical scheme that the present embodiment is provided, is used for simulation multifunctional vehicle total by using short interruption simulated assembly 1
Line 4 produces short circuit or open circuit fault, and its input is connected with MVB 4, and is used using interference signal simulated assembly 2
The failure produced when simulation multifunctional vehicle bus 4 is interfered, its first input end is connected with MVB 4,
And use selecting switch 3, two inputs of selecting switch 3 output end respectively with short interruption simulated assembly 1 and interference
First output end of signal imitation component 2 is connected, and the fault-signal produced by one of component is supplied into multifunctional vehicle
Bus 4, produces the state of failure, including short circuit, open circuit fault with simulation multifunctional vehicle bus 4, and signal delay, folded
Plus trouble light is waited, and then tested for the antijamming capability to MVB networks or MVB equipment.
Embodiment eight
The present embodiment is on the basis of above-described embodiment, MVB failure simulation device to be carried out further
Optimization, the especially implementation to interference signal simulated assembly 2 further optimized.
Fig. 8 is interference signal simulated assembly in the MVB failure simulation device that the embodiment of the present invention eight is provided
Structural representation.As shown in figure 8, interference signal simulated assembly 2 also has the second input, interference signal simulated assembly 2
Second input is used to be connected with signal generator 5, the second interference signal for receiving the generation of signal generator 5.
Interference signal simulated assembly 2 also includes operational amplifier 24, and first input end and the digital-to-analogue of operational amplifier 24 turn
The output end of parallel operation 23 is connected, the second input of the second input of operational amplifier 24 and above-mentioned interference signal simulated assembly 2
End is connected, and the output end of operational amplifier 24 is connected with the first output end of above-mentioned interference signal simulated assembly 2, operational amplifier
24 are used to produce the 3rd interference signal after being overlapped the first interference signal and the second interference signal.
When the second input is hanging, namely signal generator 5 is not connected to, then by signal processor 22 to MVB
After signal is handled, retransmit to MVB, simulate the first interference signal.When the second input connects with signal generator 5
Connect, but signal processor 22 is not when handling MVB signal, only produces the second interference signal by signal generator 5,
Retransmit to MVB.The first interference signal is obtained when signal processor 22 is handled the progress of MVB signal, and signal is sent out
When raw device 5 also produces the second interference signal, operational amplifier 24 is formed after first interference signal and the second interference signal add up
3rd interference signal, sends to MVB.The technical scheme that the present embodiment is provided, can produce a variety of interference signals, simulate many
Plant MVB failures.
Further, before above-mentioned analog-digital converter 21, signal conditioner is also provided with, analog-to-digital conversion is connected to
Between device 21 and first input end, pre-processed for the signal to MVB, for example adjust amplitude, amplification,
Filtering etc..After digital analog converter 23, signal conditioner can also be provided with, after nursing one's health interference signal, is made
The parameters such as the amplitude of its signal are consistent with MVB signals.
In the present invention, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying and be relative
Importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be with bright
Show or implicitly include one or more this feature.In the description of the invention, " multiple " are meant that at least two,
Such as two, three etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect or can communicate with one another；Can be joined directly together, can also be indirectly connected to by intermediary, can
To be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of MVB failure simulation device, it is characterised in that including：Short interruption simulated assembly, interference letter
Number simulated assembly and selecting switch；
The input of the short interruption simulated assembly is used to be connected with MVB, the short interruption simulated assembly
Output end be connected with an input of the selecting switch；
The interference signal simulated assembly has a first input end and the first output end, the first input end be used for it is multi-functional
Vehicle bus is connected；First output end is connected with another input of the selecting switch；
The output end of the selecting switch is used to be connected with MVB.
2. MVB failure simulation device according to claim 1, it is characterised in that the short interruption mould
Intending component includes：First switch, second switch and the 3rd switch；
The first switch is connected between the input of the short interruption simulated assembly and output end；
One end of the second switch is used to receive high level signal, the output end of the other end and the short interruption simulated assembly
It is connected；
One end of 3rd switch is used to be grounded, and the other end is connected with the output end of the short interruption simulated assembly.
3. MVB failure simulation device according to claim 2, it is characterised in that the short interruption mould
Intending component also includes：4th switch and first resistor；
One end of the first resistor is used to receive high level signal, and the other end is connected with one end of the described 4th switch；It is described
The other end of 4th switch is connected with the output end of the short interruption simulated assembly.
4. MVB failure simulation device according to claim 3, it is characterised in that the short interruption mould
Intending component also includes：5th switch and second resistance；
One end of the second resistance is connected with the output end of the short interruption simulated assembly, the other end and the 5th switch one
End is connected；The other end of 5th switch is used to be grounded.
5. MVB failure simulation device according to claim 4, it is characterised in that the short interruption mould
Intending component also includes：6th switch；
One end of 6th switch is connected with the output end of the short interruption simulated assembly, and the other end is multi-functional with another
The output end of short interruption simulated assembly in vehicle bus failure simulation device is connected.
6. MVB failure simulation device according to claim 5, it is characterised in that the short interruption mould
Intending component also includes：7th switch and 3rd resistor；
After 7th switch and 3rd resistor series connection, the two ends of the 6th switch are connected in parallel on.
7. MVB failure simulation device according to claim 1 or 2, it is characterised in that the interference letter
Number simulated assembly includes：Analog-digital converter, signal processor and the digital analog converter being sequentially connected, the analog-digital converter it is defeated
Entering end is used to be connected with the first input end, for receiving MVB signal；The output of the digital analog converter
Hold for being connected with first output end, the signal processor is used for the MVB after analog-to-digital conversion
Signal is handled to form the first interference signal.
8. MVB failure simulation device according to claim 7, it is characterised in that the signal processor
For on-site programmable gate array FPGA.
9. MVB failure simulation device according to claim 7, it is characterised in that the interference signal mould
Intending component also has the second input, and the second input of the interference signal simulated assembly is used to be connected with signal generator,
For receiving the second interference signal that the signal generator is produced；
The interference signal simulated assembly also includes operational amplifier, the first input end of the operational amplifier and digital-to-analogue conversion
The output end of device is connected, and the second input of the operational amplifier is connected with second input, the operational amplifier
Output end be connected with first output end, the operational amplifier be used for the first interference signal is entered with the second interference signal
The 3rd interference signal is produced after row superposition.
10. MVB failure simulation device according to claim 7, it is characterised in that the interference signal
Simulated assembly also includes：Signal conditioner, the signal conditioner is connected to the analog-digital converter and the first input end
Between.
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