CN107450345A - The on-line simulation system of CAN mode of operation - Google Patents
The on-line simulation system of CAN mode of operation Download PDFInfo
- Publication number
- CN107450345A CN107450345A CN201710260186.8A CN201710260186A CN107450345A CN 107450345 A CN107450345 A CN 107450345A CN 201710260186 A CN201710260186 A CN 201710260186A CN 107450345 A CN107450345 A CN 107450345A
- Authority
- CN
- China
- Prior art keywords
- mode
- switch
- circuit
- pole double
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
Abstract
The invention discloses a kind of on-line simulation system of CAN mode of operation, including for simulating the CAN transceiver analogue unit of CAN transceiver receiving and transmitting signal, load circuit is provided between the CANH pins and CANL pins of the CAN transceiver analogue unit；Mode switch element includes node mode switching circuit and mode bus switching circuit, the node mode switching circuit is used to for CAN nodes to be switched to the fault mode for connecting and being short-circuited to the fault mode of power supply or being short-circuited to ground, and the mode bus switching circuit is used to the CAN nodes switching to normal mode of operation/open circuit fault pattern/short circuit failure mode.The analogue system can simulate CAN normal mode of operation and failure jamming pattern, and energy fast playback and its malfunction of positioning, can realize cost efficiency in the exploitation to CAN and using process.
Description
Technical field
The present invention relates to the on-line simulation system technical field of CAN mode of operation, more particularly to a kind of automotive field
The on-line simulation system of middle CAN mode of operation.
Background technology
CAN (Controller Area Network) can complete data type and reliability in onboard system and be not quite similar
Communicated between each electronic control system, and " reducing wire harness quantity " can be realized, " by multiple LAN (LAN), carried out a large amount of
The needs of the high-speed communication of data ".And be attached by a pair of CANs between each electronic control system, to ensure
Its performance reliability, during using and developing CAN, be required to reference to international standard (such as ISO11898 standards,
SAE standard etc.) and OEM (enterprise) standards its normal mode of operation and failure jamming pattern are tested and verified.
And this test checking and its malfunction elimination, the mode mainly manually or semi-automatically tested are realized now and is carried out
Test, its actual measurement process need engineer to carry out a large amount of repeated works.If the developer of first contacts CAN will spend
More time, or even some failures interference producing cause is difficult to judge exactly.Therefore, there is efficiency in such method
Low, fault recurrence is difficult to the problems such as express delivery positions, and serious have impact on operating efficiency.
The content of the invention
The technical problems to be solved by the invention are：A kind of on-line simulation system of CAN mode of operation is provided, this is imitative
True system can simulate CAN normal mode of operation and failure jamming pattern, and energy fast playback and its malfunction of positioning, can
Cost efficiency is realized in the exploitation to CAN and using process.
In order to solve the above technical problems, the technical scheme is that：A kind of in-circuit emulation system of CAN mode of operation
System, for simulating the CAN transceiver analogue unit of CAN transceiver receiving and transmitting signal, the CANH of the CAN transceiver analogue unit draws
Load circuit is provided between pin and CANL pins；Mode switch element includes node mode switching circuit and mode bus switching electricity
Road, the node mode switching circuit are used to be switched to CAN nodes to connect to be short-circuited to the fault mode of power supply or be short-circuited to ground
Fault mode, the mode bus switching circuit is used to the CAN nodes switching to normal mode of operation/open circuit fault mould
Formula/short circuit failure mode.
As an improvement mode, the CAN transceiver analogue unit includes CAN sending modules and CAN and receives
Module, the CAN sending modules include the speed buffering that order is arranged between TXD pins and CANH the and CANL pins
Door, output stage control module and the current limliting output level module with counnter attack protection, the current limliting output stage mould with counnter attack protection
Block includes the flash output stage that output is CANH and the low side output stage that output is CANL, and the CAN sending modules also include upper
Pull-up resistor, the first DC bias circuit and build-out resistor, first DC bias circuit is providing the hidden of CAN output stages
Property level, the build-out resistor match with whole CAN network resistor.
As an improvement mode, the CAN receiving modules include to complete high speed analog signal being transformed into numeral
The Differential Input high speed hysteresis loop comparator of signal, the Differential Input high speed hysteresis loop comparator are additionally provided with the second direct current biasing electricity
Road, second DC bias circuit receive common mode input to provide CAN.
As an improvement mode, the TXD pins connect the defeated of described pull-up resistor one end and the speed buffering door
Enter end, another termination power of described pull-up resistor, the output stage control module described in the output termination of the speed buffering door
Input, two output ends of the output stage control module connect the flash output stage and the low side output stage respectively
Input, one end of output the first build-out resistor of termination of the flash output stage and the load circuit, first matching
DC bias circuit divider node and Differential Input high speed hysteresis loop comparator negative sense input described in another termination of resistance
End, the output of the low side output stage terminate one end of second build-out resistor and the load circuit, the load circuit
It is connected between the CANH pins and CANL pins of the CAN transceiver analogue unit, another termination of second build-out resistor
Described DC bias circuit divider node and the Differential Input high speed hysteresis loop comparator positive input, the high speed hysteresis
Comparator output terminal connects the RXD pins of the CAN receiving modules, and the CANH pins order dpdt double-pole double-throw (DPDT) switching switch SW1's consolidates
Fixed contact, described connecting valve SW5 one end of single-pole double throw switching switch SW1 contacts 1, the other end parallel connection of the switch SW5 are opened
Close SW7 and other CAN nodes, the order dpdt double-pole double-throw (DPDT) switching switch SW3 of contact 2 of single-pole double throw switching switch SW1 fixation
Contact, the contact 1 of the single-pole double throw switching switch SW3 connect short-circuit power supply, the contact of the single-pole double throw switching switch SW3
2 connection power supplys, the fixed contact of the CANL pins order dpdt double-pole double-throw (DPDT) switching switch SW2, the single-pole double throw switching switching
Switch the connecting valve SW6 one end of SW2 contacts 1, other end paralleling switch SW7 and described other CAN section of the switch SW6
Point, the described single-pole double throw switching switch SW2 order dpdt double-pole double-throw (DPDT) switching switch SW4 of contact 2 fixed contact, the hilted broadsword are double
The contact 1 for throwing switching switch SW4 connects short-circuit power supply, and the contact 2 of the single-pole double throw switching switch SW4 is opened with connecting power supply
The end for closing SW8 is connected between contact 1 and the switch SW5 of the single-pole double throw switching switch SW1, and the SW8's is another
It is terminated between contact 2 and the switch SW5 of the single-pole double throw switching switch SW1, the end for switching SW9 is connected to the list
Between dpdt double-pole double-throw (DPDT) switching switch SW2 contact 1 and the switch SW6, described the another of switch SW9 is terminated at the single-pole double throw
Between switching switch SW2 contact 2 and the switch SW6.
As an improvement mode, the resistance of the pull-up resistor is more than 1k Ω.
As an improvement mode, the output stage control module is the control chip for having pump electricity charge capability.
As an improvement mode, diode can be selected for the device of the circuit of counnter attack protection or MOSFET is brilliant
Body pipe or relay.
As an improvement mode, the resistance of the build-out resistor is less than or equal to 120 Ω.
As an improvement mode, the DC bias circuit output voltage range is 2V~3V.
Use technique effect acquired by above-mentioned technical proposal for：
The on-line simulation system of the CAN mode of operations of the application has the following advantages that：
First, the system is by the way that CAN transceiver analogue unit binding pattern switch unit can truly simulation CAN be just
Normal mode of operation and fault mode simultaneously carry out in-circuit emulation；
Second, mode switch element energy fast playback and positioning CAN malfunction, can be achieved the mesh of cost efficiency
's；
Third, the analogue system passes through its function of the transmitting-receiving of CAN transceiver analogue unit completion data, its implementation process knot
Structure is simple, and device is few, and cost is low, and stable performance；
Fourth, CAN normal work is completed by the main switching switch and follow-up work of switch mode switch unit
The switching of pattern and fault mode, it is simple to operate, can high-speed simulation and test, from can accurately realize fault location.
Because the resistance of pull-up resistor should be greater than 1k Ω, pull-up resistor can ensure that CAN is operated in determination level state,
I.e. in CAN idle state and CAN transceiver power-on and power-off, CAN output be it is determined that recessive level
(Recessive Level) state, in order to avoid disturb the normal work of other CAN nodes 5.
Because the output stage control module is the control chip that has pump electricity charge capability, control output can be quickly realized
Level switch switching effect,
Because the resistance of the build-out resistor is less than or equal to 120 Ω, build-out resistor is real when CAN exports recessive level
Now match with whole CAN network resistor.
Because diode or metal-oxide half field effect transistor or relay etc. can be selected in the device of the circuit of counnter attack protection.
Due to characterized in that, the DC bias circuit output voltage range is 2V~3V, to provide CAN output stages
Recessive level.
Brief description of the drawings
Fig. 1 represents the structured flowchart of the on-line simulation system of CAN mode of operations of the present invention；
In figure, 1-CAN transceiver analog units, 101- pull-up resistors, 102- speed buffering doors, 103- output stages control mould
Block, 104- flash output stages, the low side output stages of 105-, the build-out resistors of 106- first, the build-out resistors of 107- second, 108- difference are defeated
Enter high speed hysteresis loop comparator, 109- DC bias circuits, 2- load circuits, 31a, 31b, 41a, 41b, 32a, 32b, 42a, 42b-
Contact, SW1, SW2, SW3, SW4- single-pole double throw switching switch, SW5, SW6, SW7, SW8, SW9- switch, 111-TXD pins,
112-RXD pins, 113-CANH pins, 112-CANL pins, 4- node mode switching circuits, 5- mode bus switching circuits,
The other CAN nodes of 6-.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of on-line simulation system of CAN mode of operation, including for simulating CAN transceiver transmitting-receiving
The CAN transceiver analogue unit 1 of signal, it is provided between the CANH pins 113 and CANL pins 114 of CAN transceiver analogue unit 1
Load circuit 2.CAN transceiver analogue unit 1 includes CAN sending modules and CAN receiving modules, and CAN sending modules include
Order is arranged at speed buffering door of the TXD pins 111 (transmission data pin) between CANH pins 113 and CANL pins 112
102nd, output stage control module 103 and the current limliting output level module with counnter attack protection, the current limliting output stage mould with counnter attack protection
Block includes flash output stage 104 and low side output stage 105.
Speed buffering door 102 is that the follow-up circuit of output stage control module 103 strengthens current drive capability, and with sound at a high speed
Should be able to power, preferably rapidly input the buffered gate that buffered gate is high speed hysteresis comparing function.The output stage control of CAN sending modules
System, can quickly realize the switching effect of control output stage switch, and preferable output stage control is with charge_pump (pump electricity electricity
Lotus) ability control chip or ideal signal source.The output stage of CAN sending modules is made up of high-low side output, for output
Triode, NMOSFET, PMOSFET (N-channel, P-channel metal-oxide-semiconductor field effect can be selected in the device of the high-low side of level
Answer transistor), controlled perfect switch etc..Model in view of simplifying output stage.The application preferably consider PMOSFET and
NMOSFET forms high-low side as its output stage.To prevent terminal resistance in the excessive damage CAN network of output stage electric current
Resistance (100 Ω -130 Ω), because that need to add current-limiting protection in output stage, while the impedance of its current-limiting protection need to be with the resistance of CAN network
Anti- matching, because of its span 10 Ω -130 Ω, the resistance of preferable current-limiting protection is 60 Ω.
The circuit of the counnter attack protection of the output stage of CAN sending modules 6, is both needed to for the output-stage circuit in security industry field
Consider the circuit of counnter attack protection, diode, MOSFET, metal oxygen can be selected in the device for the circuit that the counnter attack for output is protected
Compound semiconductor field effect transistor, relay etc..Realization in view of circuit is simple and reliability, the application preferably consider
Diode is protected as counnter attack.
CAN sending modules also include pull-up resistor 101, DC bias circuit 109, the first build-out resistor 106 and second
Build-out resistor 107.Pull-up resistor 101 is connected between TXD pins 111 and speed buffering door 102, and pull-up resistor 101 is to ensure that CAN
Bus is operated in determination level state, i.e., in CAN idle state and CAN transceiver power-on and power-off, CAN output be
Recessive level (Recessive Level) state determined, in order to avoid disturb the normal work of other CAN nodes 6.
Other CAN nodes 6 refer to other CAN nodes in CAN network in addition to the node corresponding to load circuit 2
6, for the load for describing to carry in CAN network.If the node corresponding to load circuit 2 is terminal node, other
The Standard resistance range of CAN nodes 6 is the Ω of 50 Ω~130；If this node is nonterminal node, other Standard resistance ranges of CAN nodes 6 are 45 Ω
~130 Ω.This preferable node of the application is terminal node, and the resistance of the pull-up resistor 101 should be greater than 1k Ω, the pull-up for having choosing
The resistance of resistance 101 is 4.6k Ω.
For DC bias circuit 109 to provide the recessive level of CAN output stages, the first build-out resistor 106, second matches electricity
Resistance 107 matches with whole CAN network resistor.The DC bias circuit 109 of CAN sending modules 6, there is provided CAN output stages
Recessive level, its output voltage range of DC bias circuit 109 [2V, 3V].According to international standard and company standard, it is contemplated that
CAN sending module stability, the application preferably consider that the output voltage of DC bias circuit 109 is 2.5V, DC bias circuit
109 single-ended equivalent resistance range 5k Ω -50k Ω, the equivalent resistance range 10k Ω -100k of the difference of DC bias circuit 109
Ω.Preferable DC bias circuit 109 single-ended equivalent resistance 10k Ω, the equivalent resistance 20k of the difference of DC bias circuit 109
Ω。
First build-out resistor 106 of CAN sending modules 6, the second build-out resistor 107 are realized when CAN exports recessive level
Match with whole CAN network resistor, the resistance of build-out resistor should be not more than 120 Ω, the resistance of preferable build-out resistor
60Ω。
Receiving module 7 is made up of Differential Input high speed hysteresis loop comparator 8, the two parts of DC bias circuit 109.Receive mould
The Differential Input high speed hysteresis loop comparator 8 of block 7 completes the function that high speed analog signal is transformed into data signal, meanwhile, increase is stagnant
Function is returned to improve the antijamming capability of receiving module, the output of Differential Input high speed hysteresis loop comparator meets CAN_RXD and (receives number
According to pin).The DC bias circuit 109 of receiving module 7, with the DC bias circuits 109 of CAN sending modules 6 be same
Circuit, the two shares this circuit, and it provides the recessiveness that CAN receives the CAN output stages of common mode input and CAN sending modules 6
Level.
Node where CAN transceiver analogue unit is terminal node, secondly series impedance scope is 100 Ω~130
Ω, if this node is nonterminal node, secondly series impedance should be not less than 1k Ω, this node that the application has choosing is terminal section
Point.
Mode switch element is electrically connected by CANH pins 113 with CANL pins 114 with CAN transceiver analogue unit, mould
Formula switch unit includes node mode switching circuit 4 and mode bus switching circuit 5, and node mode switching circuit 4 is used for will
Node where CAN transceiver analogue unit switches to the fault mode for being short-circuited to power supply or is short-circuited to the fault mode on ground, always
Ray mode switching circuit 5 is used to the CAN nodes switching to normal mode of operation/open circuit fault pattern/short circuit failure mode.
The annexation of the on-line simulation system of the CAN mode of operations of the application：
TXD pins 111 (sending CAN signal pin) connect the input of the speed buffering door 102 of one end sum of pull-up resistor 101
End, and 101 another termination power of pull-up resistor (i.e. VDD, vdd voltage scope are 4.5V-5.5V).Speed buffering door 102 exports
Terminate the input of output stage control module 103, the current limliting of the output end difference tape splicing counnter attack protection of output stage control module 103
Two inputs of output stage, one end of output the second build-out resistor 107 of termination of the low side output stage 105 and transceiver analog
The load circuit 2 of unit, the receiving module 7 of the divider node sum of DC bias circuit 109 of 107 another termination of the second build-out resistor
The positive input of Differential Input high speed hysteresis loop comparator 8.Output the first build-out resistor 106 of termination of flash output stage 104
One end, the Differential Input of the receiving module 7 of the divider node sum of another termination DC bias circuit 109 of the first build-out resistor 106
The negative input of high speed hysteresis loop comparator 8, the RXD pins 112 of the output end receiving module 7 of Differential Input high speed hysteresis loop comparator 8
(receiving CAN signal pin).
In addition, the height output level 104 and low side output stage 105 of the current limliting output stage with counnter attack protection also distinguish order knife pair
Throw switching switch SW1 and single-pole double throw switching switch SW2 fixed contacts, single-pole double throw switching switch SW1 contact 31a and hilted broadsword
Switch SW5 and switch the SW6 one end for the pattern 4 that double-throw switching switch SW2 contact 31b is connected respectively, mode bus switching electricity
The switch SW5 on road and the switch SW6 other ends it is in parallel switch SW7 and other CAN nodes 6, single-pole double throw switching switch SW1's
Contact 31a and single-pole double throw switching switch SW2 contact 31b connect the single-pole double throw switching switch of node mode switching circuit respectively
SW3 and single-pole double throw switching switch SW4 fixed contact, the single-pole double throw switching switch SW3's of node mode switching circuit touches
The short-circuit power supply of point 41a and single-pole double throw switching switch SW4 contact 42a difference connecting node mode switching circuits, node mould
The single-pole double throw switching switch SW3 of formula switching circuit contact 41b and single-pole double throw switching switch SW4 contact 42b connect respectively
With connecing the short circuit of node mode switching circuit (i.e. power supply).
A switch SW8 end is connected between single-pole double throw switching switch SW1 contact 31a and switch SW5, switchs SW8's
Another to be terminated between single-pole double throw switching switch SW1 contact 31b and the switch SW5, the end for switching SW9 is connected to hilted broadsword
Between double-throw switching switch SW2 contact 42a and switch SW6, switch the another of SW9 and be terminated at single-pole double throw switching switch SW2
Contact 32b and switch SW6 between.
Contact 31a is switched to when single-pole double throw switches switch SW1, single-pole double throw switching switch SW2 switches to contact simultaneously
During 32a, the passage that the CAN nodes 6 connect whole CAN network will turn on；Touched when single-pole double throw switching switch SW1 switches to switch
During point 31b or when single-pole double throw switching switch SW2 switches to contact 32b, the CAN nodes 6, which will switch to work in, is short-circuited to electricity
The fault mode on source/ground.
The switching of node mode switching circuit 4 by single-pole double throw switch switch SW3 and single-pole double throw switching switch SW4 come
Realize, when single-pole double throw switching switch SW3 switches to switch contact 41a or single-pole double throw switching switch SW4 switches to switch
During the 42a of contact, the node where CAN transceiver analogue unit will be operate in being short-circuited to the fault mode of power supply；Work as single-pole double throw
Switching switch SW3 switches to switch contact 41b or single-pole double throw switching switch SW4 when switching to switch contact 42b, and this is worked in
It is short-circuited to the fault mode on ground.
Mode bus switching circuit 5 be by switch SW5 switch SW6 and switch SW7 and coordinate single-pole double throw switching open
SW1 and single-pole double throw switching switch SW2 are closed to realize the switching of its mode of operation.When switch SW7 disconnections, and switch SW5 and open
SW6 closures are closed, meanwhile, single-pole double throw switching switch SW1 switches to switch contact 31a, single-pole double throw switching switch SW2 is together cut
When shifting to switch contact 32a, CAN will be operate in normal mode；When switch SW7 disconnections, and switch SW5 and switch SW6 and appoint
One disconnection, meanwhile, single-pole double throw switching switch SW1 switches to switch contact 31a, single-pole double throw switching switch SW2 is switched to
During switch contact 32a, CAN will be operate in open circuit fault pattern；As switch SW5 and switch SW6 closures, meanwhile, hilted broadsword is double
Throw switching switch SW1 and switch to switch contact 31a, single-pole double throw switching switch SW2 while when switching to switch contact 32a, if
SW7 closures are now switched, CAN will be operate in short circuit failure mode.When switch SW7 disconnects, switch SW5 and switch SW6 connect
It is logical, meanwhile, single-pole double throw switching switch SW1 switches to switch contact 31a, single-pole double throw switching switch SW2 switches to switch and touched
During point 32a, then ON switch SW8 or switch SW9, and SW3 or switch SW4 connection power supplys or ground are switched, the bus electricity that can be carried out
Source or earth fault simulation.
, can by the CAN normal mode of operation waveform simulated in the above-mentioned analogue system and the contrast of measured waveform data
It is very to coincide to know both data, so as to which the on-line simulation system for the CAN mode of operations for fully demonstrating the application can be completeer
Mould preparation draws up CAN normal mode of operation and fail operation pattern.The preferred embodiment of the application is these are only, is not used to
Limit the application.For those skilled in the art, the application can have various modifications and variations.All essences in the application
God any modification, equivalent substitution and improvements made etc., should be included within the protection domain of the application with principle.
Claims (10)
- A kind of 1. on-line simulation system of CAN mode of operation, it is characterised in that including：For simulating the CAN transceiver analogue unit of CAN transceiver receiving and transmitting signal, the CANH of the CAN transceiver analogue unit Load circuit is provided between pin and CANL pins；Mode switch element, the mode switch element includes node mode switching circuit and mode bus switching circuit, described Node mode switching circuit is used to for CAN nodes to be switched to the failure mould for connecting and being short-circuited to the fault mode of power supply or being short-circuited to ground Formula, the mode bus switching circuit are used to the CAN nodes switching to normal mode of operation/open circuit fault pattern/short circuit Fault mode.
- 2. the on-line simulation system of CAN mode of operation as claimed in claim 1, it is characterised in that the CAN transceiver Analogue unit includes CAN sending modules and CAN receiving modules, and the CAN sending modules include order and are arranged at TXD pins and institute State speed buffering door, output stage control module and the current limliting output stage mould with counnter attack protection between CANH and CANL pins Block, the current limliting output level module with counnter attack protection include the flash output stage that output is CANH and the low side that output is CANL Output stage, the CAN sending modules also include pull-up resistor, the first DC bias circuit and build-out resistor, and described first is straight Biasing circuit is flowed to provide the recessive level of CAN output stages, the build-out resistor and whole CAN network resistor phase Match somebody with somebody.
- 3. the on-line simulation system of CAN mode of operation as claimed in claim 2, it is characterised in that the CAN receives mould Block is included to complete the Differential Input high speed hysteresis loop comparator that high speed analog signal is transformed into data signal, the Differential Input High speed hysteresis loop comparator is additionally provided with the second DC bias circuit, and second DC bias circuit is defeated to provide CAN receptions Enter common-mode voltage.
- 4. the on-line simulation system of CAN mode of operation as claimed in claim 3, it is characterised in that first direct current Biasing circuit and second DC bias circuit are same circuit.
- 5. the on-line simulation system of CAN mode of operation as claimed in claim 4, it is characterised in that the TXD pins connect Described pull-up resistor one end and the input of the speed buffering door, another termination power of pull-up resistor, the high speed are delayed The input of output stage control module described in the output termination of chongmen, two output ends difference of the output stage control module The input of the flash output stage and the low side output stage is connect, the output of the flash output stage terminates the first build-out resistor One end and the load circuit, another termination DC bias circuit divider node of first build-out resistor and described Differential Input high speed hysteresis loop comparator negative input, the output of the low side output stage terminate the one of second build-out resistor End and the load circuit, the load circuit be connected to the CANH pins of the CAN transceiver analogue unit and CANL pins it Between, another termination DC bias circuit divider node and the Differential Input high speed hysteresis ratio of second build-out resistor Compared with device positive input, the high speed hysteresis loop comparator output terminates the RXD pins of the CAN receiving modules, and the CANH draws Pin order dpdt double-pole double-throw (DPDT) switching switch SW1 fixed contact, the connecting valve SW5 mono- of single-pole double throw switching switch SW1 contacts 1 End, the other end paralleling switch SW7 and other CAN nodes of the switch SW5, the contact 2 of the single-pole double throw switching switch SW1 Order dpdt double-pole double-throw (DPDT) switching switch SW3 fixed contact, the contact 1 of the single-pole double throw switching switch SW3 connect short-circuit power supply, institute With stating the single-pole double throw switching switch SW3 connection of contact 2 power supply, the CANL pins order dpdt double-pole double-throw (DPDT) switching switch SW2's consolidates Fixed contact, described connecting valve SW6 one end of single-pole double throw switching switching switch SW2 contacts 1, the other end of the switch SW6 is simultaneously Connection switch SW7 and other CAN nodes, the order dpdt double-pole double-throw (DPDT) switching switch of contact 2 of the single-pole double throw switching switch SW2 SW4 fixed contact, the contact 1 of the single-pole double throw switching switch SW4 connect short-circuit power supply, the single-pole double throw switching switch With connecting power supply, the end for switching SW8 is connected to the contact 1 of the single-pole double throw switching switch SW1 and opened with described for SW4 contact 2 Between closing SW5, between another contact 2 for being terminated at the single-pole double throw switching switch SW1 of the SW8 and the switch SW5, A switch SW9 end is connected between contact 1 and the switch SW6 of the single-pole double throw switching switch SW2, the switch SW9 Another contact 2 for being terminated at single-pole double throw switching switch SW2 and the switch SW6 between.
- 6. the on-line simulation system of CAN mode of operation as claimed in claim 5, it is characterised in that the pull-up resistor Resistance be more than 1k Ω.
- 7. the on-line simulation system of CAN mode of operation as claimed in claim 6, it is characterised in that the output stage control Molding block is the control chip for having pump electricity charge capability.
- 8. the on-line simulation system of CAN mode of operation as claimed in claim 6, it is characterised in that the counnter attack protection The device of circuit diode or metal-oxide half field effect transistor or relay can be selected.
- 9. the on-line simulation system of CAN mode of operation as claimed in claim 5, it is characterised in that the build-out resistor Resistance be less than or equal to 120 Ω.
- 10. the on-line simulation system of CAN mode of operation as claimed in claim 5, it is characterised in that the direct current biasing Circuit output voltage scope is 2V~3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710260186.8A CN107450345A (en) | 2017-04-20 | 2017-04-20 | The on-line simulation system of CAN mode of operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710260186.8A CN107450345A (en) | 2017-04-20 | 2017-04-20 | The on-line simulation system of CAN mode of operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107450345A true CN107450345A (en) | 2017-12-08 |
Family
ID=60486890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710260186.8A Pending CN107450345A (en) | 2017-04-20 | 2017-04-20 | The on-line simulation system of CAN mode of operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107450345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112000079A (en) * | 2020-08-19 | 2020-11-27 | 北京电子工程总体研究所 | CAN bus node simulation equipment, system and fault simulation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008030162A1 (en) * | 2008-06-27 | 2009-12-31 | Inchron Gmbh | Method for testing operability of embedded component in e.g. computer, for e.g. vehicle, involves determining operability of embedded component by comparing time response of produced signals with predetermined time response |
| CN101793944A (en) * | 2009-01-21 | 2010-08-04 | 清华大学 | Fault simulation system used for developing, marking and testing battery management system |
| CN101868767A (en) * | 2007-11-23 | 2010-10-20 | 伊利诺斯工具制品有限公司 | System, controller and method for synchronized capture and synchronized playback of data |
| CN204203760U (en) * | 2014-10-11 | 2015-03-11 | 广州汽车集团股份有限公司 | Fault simulation circuit and CAN RTA reliability test assembly |
| CN106250589A (en) * | 2016-07-20 | 2016-12-21 | 北京航天发射技术研究所 | A kind of based on Labview modular CAN control Design of Simulation System method |
-
2017
- 2017-04-20 CN CN201710260186.8A patent/CN107450345A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101868767A (en) * | 2007-11-23 | 2010-10-20 | 伊利诺斯工具制品有限公司 | System, controller and method for synchronized capture and synchronized playback of data |
| DE102008030162A1 (en) * | 2008-06-27 | 2009-12-31 | Inchron Gmbh | Method for testing operability of embedded component in e.g. computer, for e.g. vehicle, involves determining operability of embedded component by comparing time response of produced signals with predetermined time response |
| CN101793944A (en) * | 2009-01-21 | 2010-08-04 | 清华大学 | Fault simulation system used for developing, marking and testing battery management system |
| CN204203760U (en) * | 2014-10-11 | 2015-03-11 | 广州汽车集团股份有限公司 | Fault simulation circuit and CAN RTA reliability test assembly |
| CN106250589A (en) * | 2016-07-20 | 2016-12-21 | 北京航天发射技术研究所 | A kind of based on Labview modular CAN control Design of Simulation System method |
Non-Patent Citations (1)
| Title |
|---|
| 杨庆彪, 国防工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112000079A (en) * | 2020-08-19 | 2020-11-27 | 北京电子工程总体研究所 | CAN bus node simulation equipment, system and fault simulation method |
| CN112000079B (en) * | 2020-08-19 | 2021-12-07 | 北京电子工程总体研究所 | CAN bus node simulation equipment, system and fault simulation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5745140B2 (en) | Power over Ethernet in data and spare pairs | |
| KR101988781B1 (en) | DETECTING GROUND ISOLATION FAULT IN ETHERNET PoDL SYSTEM | |
| US7420375B2 (en) | Method for digital bus testing | |
| CN101228452B (en) | Pin circuit driver | |
| US7612584B2 (en) | Simultaneous LVDS I/O signaling method and apparatus | |
| US7113759B2 (en) | Controller area network transceiver having capacitive balancing circuit for improved receiver common-mode rejection | |
| US10313139B2 (en) | Power over data lines system with redundant power connections | |
| CN103384216B (en) | Transmitter circuit and its operational approach | |
| EP1842323B1 (en) | Dual-mode detection of powered device in power over ethernet system | |
| JP2018503288A5 (en) | ||
| CN107959608A (en) | CAN bus terminal resistance matching process and device | |
| CN108494599B (en) | ARINC664 bus fault injection system and method | |
| US20130257448A1 (en) | Test board, test system and test method for a power over ethernet device | |
| CN207051682U (en) | The on-line simulation system of CAN mode of operation | |
| US20150149671A1 (en) | Systems and methods for biasing a bus | |
| CN107450345A (en) | The on-line simulation system of CAN mode of operation | |
| EP2315402A1 (en) | Automatic de-emphasis setting for driving capacitive backplane | |
| EP4340316A1 (en) | Communication link operation characteristic test system and test method | |
| CN102195658A (en) | Automatic de-emphasis setting for driving capacitive backplane | |
| JP4310280B2 (en) | Impedance conversion circuit, input / output circuit and semiconductor test equipment | |
| US7451356B2 (en) | Apparatus for configuring network media connections | |
| KR100604851B1 (en) | High speed output circuit and high speed input circuit for selectively changing swing width of input and output signals and method for changing swing width of input and output signals | |
| Lawrenz et al. | Validation of in-vehicle-protocol network topologies | |
| TWI519102B (en) | Flexray receiver | |
| CN220254525U (en) | Ethernet testing device and testing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |