CN206804302U - A kind of simulative automobile communication test device - Google Patents
A kind of simulative automobile communication test device Download PDFInfo
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- CN206804302U CN206804302U CN201720126220.8U CN201720126220U CN206804302U CN 206804302 U CN206804302 U CN 206804302U CN 201720126220 U CN201720126220 U CN 201720126220U CN 206804302 U CN206804302 U CN 206804302U
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Abstract
The utility model discloses a kind of simulative automobile communication test device, including USB interface, virtual serial port, central controller, logical extension controller, data storage and communications interface unit, the USB interface is communicated to connect by virtual serial port and the central controller, the virtual serial port also communicates to connect with logical extension controller, the central controller is connected with logical extension controller, the logical data communication interface of the central controller, the logic level interface of logical extension controller is connected with the communications interface unit respectively, the OBD interfaces of communications interface unit and automobile connect, the data-interface of the central controller, the data-interface of logical extension controller is connected with data storage respectively.
Description
Technical field
It the utility model is related to automotive electronics detection technique field, more particularly to a kind of simulative automobile communication test device.
Background technology
In recent years, the recoverable amount of automobile improves constantly, and the OBD instrument related to automotive test exploitation also obtains
Rapidly develop, " onboard diagnostic system：On-Board Diagnostic, are abbreviated as：OBD”.OBD instrument (OBD) can
To monitor the operation conditions of engine at any time, once finding to be possible to the situation that causes failure, warning can be sent at once, thus into
For the indispensable instrument of light-duty vehicle.Usually, on automobile be provided be used for record automobile engine operation conditions and and its it is each
The OBD interfaces of each time segment data of processing system, reading is connected with the OBD interfaces on automobile by using automobile fault diagnostic apparatus
Access evidence, is then connected by data wire with computer again, the read data of display.In addition, engineer surveys to vehicle failure
Runin generally requires automobile fault diagnostic apparatus and automobile ECU simulator, computer and external power supply connecting use when sending out, such as
Shown in Fig. 1, the said equipment is numerous, and computer just includes main frame, display and keyboard and mouse, and it is numb to carry comparison
It is tired, especially it is unfavorable for the progress of work in the case where field etc. is without external power supply.During vehicle diagnosis is developed, engineering
Teacher needs constantly to carry out communication debugging, automobile computer ECU either wire harness complexity and power supply requirement with automobile computer ECU
Deng the communicating interrupt all easily caused by the problems such as laboratory wire harness contacts, and cause the increase of development cost, therefore, engineer has
Necessary to replace automobile ECU to realize the device of ECU commands in return functions laboratory is a kind of, to solve, wire harness is complicated, is easy to
The test of simulated automotive communication interface, not readily portable technical problem.
Utility model content
The purpose of this utility model is to provide a kind of simulative automobile communication test device, according to communication of the present utility model
Test device can quickly collect the fault message of automobile, and energy automatic imitation automobile ECU communication protocol commands reply test, greatly
It is big to shorten automobile ECU simulated time, efficiency and accuracy rate are improved, to achieve these goals, the utility model is using following
Technique effect：
According to the one side of this hair utility model, there is provided a kind of simulative automobile communication test device, it is characterised in that：
It is described including USB interface, virtual serial port, central controller, logical extension controller, data storage and communications interface unit
USB interface is communicated to connect by virtual serial port and the central controller, and the virtual serial port also communicates with logical extension controller
Connection, the central controller pass through I2C communication bus is connected with logical extension controller, the logical data of the central controller
Communication interface, the logic level interface of logical extension controller are connected with the communications interface unit respectively, communications interface unit
Be connected with the OBD interfaces of automobile, the data-interface of the central controller, the data-interface of logical extension controller respectively with number
Connected according to memory, the data storage is stored using flash storage to communication test data.
Preferably, the communications interface unit comprise at least CAN interface circuit, RS232 bus interface circuits,
RS485 bus interface circuits, K bus interface circuits, the first two keys relay, the second two keys relay, the 3rd two keys relay
With the second two keys relay, the output end of the CAN interface circuit and the input terminal contacts of first two keys relay
Connection, the output end of the RS232 bus interface circuits and the input contact portion of second two keys relay, it is described
The output end of RS485 bus interface circuits and the input contact portion of the 3rd two keys relay, the K EBIs electricity
The output end on road and the input contact portion of the 4th two keys relay, the output end of first two keys relay are touched
The output for exporting terminal contacts, the 4th two keys relay for exporting terminal contacts, the 3rd two keys relay of point, the second two keys relay
Terminal contacts pass through bus and the input contact portion of the hilted broadsword relay group, the output end of the hilted broadsword relay group respectively
Contact is connected with the OBD interfaces of the automobile, and the data communication interface of the central controller passes through first passage drive circuit
The control of control terminal with first two keys relay, the control terminal, the 3rd two keys relay of the second two keys relay respectively
End, the control terminal connection of the 4th two keys relay, the logical extension controller pass through second channel drive circuit and the list
The control terminal connection of knife relay group.
Preferably, the K bus interface circuits include buffering drive circuit, resistance R1, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, triode Q1, triode
Q2, triode Q3, triode Q4, triode Q5 and diode D1, input and the logical extension control of the buffering drive circuit
The drive output connection of device processed, the output end of buffering drive circuit are connected by resistance R1 with the base stage of the triode Q1,
The insurance circuit that is emitted through of the triode Q1 is connected with the signal output part of the logical extension controller, triode Q1
Colelctor electrode be connected with resistance R2 one end, the colelctor electrode of the triode Q1 is also connected with diode D1 negative electrodes, the diode
D1 negative electrodes are connected with 5V dc sources, the resistance R2 other end one end with the resistance R3, resistance R4 one end, three respectively
The emitter stage connection of pole pipe Q2 emitter stage, triode Q3, the resistance R3 other end are connected with the base stage of the triode Q2,
The resistance R4 other end is connected with institute triode Q3 base stage, and triode Q2 colelctor electrode is connected with resistance R5 one end,
The one end of the resistance R5 other end respectively with the triode Q4 colelctor electrodes, resistance R6 is connected, triode Q3 colelctor electrode
It is connected with resistance R7 one end, the one end of the resistance R7 other end respectively with the triode Q5 colelctor electrodes, resistance R8 is connected,
The base stage of the triode Q4 is connected by resistance R9 with the first control output end of first passage drive circuit, the triode
Q5 base stage is connected by resistance R10 with the second control output end of first passage drive circuit, the other end of the resistance R6
With the first input end contact portion of the 4th two keys relay, the other end of the resistance R8 and the 4th double-pole relay
Second input contact portion of device, the triode Q4 emitter stages are connected to ground by resistance R11, the triode Q5 transmittings
Pole is connected to ground by resistance R12.
Preferably, the first passage drive circuit and second channel drive circuit use ULN2003 drivers.
Preferably, the CAN interface circuit is single line CAN bus interface circuit and/or two-wire CAN interface
Circuit.
The utility model employs above-mentioned technical proposal, and the utility model has following technique effect：
(1), communication test device of the present utility model can quickly collect the fault message of automobile, and can automatic imitation vapour
Car ECU communication protocol commands reply test, automatically generate simulated automotive ECU commands in return, when substantially reducing automobile ECU simulation
Between, the efficiency and accuracy rate of vehicle diagnosis are improved, there is good use value.
(2) analog signal of automobile communication, is formed between communication test device and automobile ECU of the present utility model, is avoided
Asking for Communication diagnostic could be completed by connection between substantial amounts of wire harness and exploitation extra diagnostic equipment and automobile ECU
Topic, reduces the use of wire harness, improves diagnostic test efficiency, and the utility model principle is simple in construction, and control is easy.
Brief description of the drawings
Fig. 1 is existing simulated automotive fault diagnosis principle structure chart；
Fig. 2 is a kind of simulative automobile communication test schematic diagram of device of the present utility model；
Fig. 3 is communications interface unit schematic diagram of the present utility model；
Fig. 4 is K bus interface circuits schematic diagram of the present utility model；
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, referring to the drawings and enumerate excellent
Embodiment is selected, the utility model is further described.However, it is necessary to illustrate, many details listed in specification
It is specific even without these just for the sake of making reader have a thorough explanation to one or more aspects of the present utility model
Details can also realize it is of the present utility model these aspect.
As shown in Fig. 2 according to a kind of simulative automobile communication test device of the present utility model, including it is USB interfaces, virtual
Serial ports, central controller, logical extension controller, data storage and communications interface unit, the USB interface is by virtually going here and there
Mouth communicates to connect with the central controller, and the virtual serial port also communicates to connect with logical extension controller, and the center controls
The I/O port of device is connected with the IO mouths of logical extension controller, the logical data communication interface of the central controller, logical extension control
The logic level interface of device processed is connected with the communications interface unit respectively, the OBD interfaces connection of communications interface unit and automobile,
Data-interface, the data-interface of logical extension controller of the central controller are connected with data storage respectively.The void
Intending serial ports includes multiple RS232 interfaces and/or RS485 interfaces, is converted to USB interface by RS232 interface, RS485 interfaces
RS232 interface and/or RS485 interfaces are communicatively coupled with central controller, logical extension controller respectively, in communication test
When PC by USB interface, virtual serial port and central processing unit connect, and in real time read central controller collection automobile ECU data
Diagnostic analysis is carried out, its is easy to connect, it is not necessary to too many wire harness, it is possible to carry out communication test and diagnosis, the center control
Device processed uses STM32F103 processor chips, the model EPM240T100C5N FPGAs that logical extension controller uses
Device.
In the utility model, as shown in figure 3, the communications interface unit comprise at least CAN interface circuit,
RS232 bus interface circuits, RS485 bus interface circuits, K bus interface circuits, the first two keys relay, the second double-pole relay
Device, the 3rd two keys relay and the second two keys relay, the output end of the CAN interface circuit and first double-pole
The input contact portion of relay, the output end of the RS232 bus interface circuits are defeated with second two keys relay
Enter terminal contacts connection, the output end of the RS485 bus interface circuits and the input terminal contacts of the 3rd two keys relay connect
Connect, the output end of the K bus interface circuits and the input contact portion of the 4th two keys relay, first double-pole
The output terminal contacts of relay, the output terminal contacts of the second two keys relay, the output terminal contacts of the 3rd two keys relay, the 4th
The output terminal contacts of two keys relay pass through bus and the input contact portion of the hilted broadsword relay group, the hilted broadsword respectively
The output terminal contacts of relay group are connected with the OBD interfaces of the automobile, and the data communication interface of the central controller passes through
First passage the drive circuit control terminal with first two keys relay, the control terminal of the second two keys relay, the 3rd respectively
The control terminal of two keys relay, the connection of the control terminal of the 4th two keys relay, the logical extension controller pass through second channel
Drive circuit is connected with the control terminal of the hilted broadsword relay group, the first passage drive circuit and second channel drive circuit
Using ULN2003 drivers；The CAN interface circuit is that single line CAN bus interface circuit and/or two-wire CAN connect
Mouth circuit, wherein, two-wire CAN interface circuit is sent and received using TJA1050 Transceiver Datas, and the single line CAN is total
Interface circuit carries out data using AU5790 and sent and received, because central controller directly leads to CAN interface circuit
Letter, need to pass through logical extension control when central controller and RS232 bus interface circuits, RS485 bus interface circuits are communicated
Device processed carries out alternative, and the signal for so only exporting RS232 bus interface circuits or RS485 bus interface circuits is through double
After knife relay, logical extension controller by data/address bus select corresponding to single knife switch, then Communication diagnostic order can be sent out
The OBD interfaces of automobile ECU are delivered to, carry out Communication diagnostic analysis.
In the utility model, as shown in figure 4, the K bus interface circuits include buffering drive circuit Buf1, resistance
R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, electricity
Hinder R12, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5 and diode D1, the buffering drive circuit
Input be connected with the drive output of logical extension controller, the output end of buffering drive circuit passes through resistance R1 and institute
State triode Q1 base stage connection, the signal for being emitted through insurance circuit and the logical extension controller of the triode Q1
Output end connects, and triode Q1 colelctor electrode is connected with resistance R2 one end, the colelctor electrode of the triode Q1 also with two poles
Pipe D1 negative electrodes connect, and diode D1 negative electrodes are connected with 5V dc sources, the resistance R2 other end respectively with the resistance R3
One end, resistance R4 one end, triode Q2 emitter stage, triode Q3 emitter stage connection, the resistance R3 other end with
The base stage connection of the triode Q2, the resistance R4 other end are connected with institute triode Q3 base stage, triode Q2 collection
Electrode is connected with resistance R5 one end, the resistance R5 other end respectively with the triode Q4 colelctor electrodes, resistance R6 one end
Connection, triode Q3 colelctor electrode is connected with resistance R7 one end, the resistance R7 other end respectively with the triode Q5
One end connection of colelctor electrode, resistance R8, the base stage of the triode Q4 pass through resistance R9 and first passage drive circuit first
Control output end is connected, and the base stage of the triode Q5 is exported by the second control of resistance R10 and first passage drive circuit
End connection, the first input end contact portion of the other end of the resistance R6 and the 4th two keys relay, the resistance R8
The other end and the 4th two keys relay the second input contact portion, the triode Q4 emitter stages pass through resistance
R11 is connected to ground, and the triode Q5 emitter stages are connected to ground by resistance R12.Because the K buses of automobile ECU are 12V/
5V, and central controller serial ports level mismatch, it is therefore desirable to carry out matching conversion to the level of input.Using four triodes
Different types of pull-up and drop-down are realized, different types of signal combination can be realized.On triode Q2 and triode Q3 is responsible for
Signal is drawn, triode Q4 and triode Q5 are responsible for the transmission of K bus signals, in addition triode Q1 Vin level control VCC level
Realize level conversion.
In the utility model, as shown in Figures 3 and 4, input and the logical extension control of the buffering drive circuit Buf1
+ the 5V or+3.3V of the drive output VCC outputs of device processed high level connection, buffering drive circuit Buf1 use SN74LS07
Driving chip.The signal output part Vin for being emitted through insurance circuit and the logical extension controller of the triode Q1 is defeated
Going out -12V~+12V low and high level connection, triode Q1 colelctor electrode leads to diode D1 and is connected with 5V dc sources, so as to
Make triode Q1 in the conduction state, then right+- 12V~+12V low and high levels enter respectively by triode Q2, triode Q3
Row amplification, input/output end port (I/O) In1 and input/output end port (I/O) In2 output+5V level difference of center control
Make triode Q4, triode Q5 in the conduction state at any time, and conversion is balanced by triode Q4, triode Q5, export
K-Uout1 and K-Uout2 two-way level signals, the now data on K bus interface circuits, and defeated according to logical extension controller
The specific instructions gone out are responded, and Communication diagnostic order is sent to automobile ECU, and automobile ECU receives K Bus Wire protocol commands
Corresponding reply is carried out afterwards to operate.When automobile ECU complete one reply operation after just in CAN, RS485 buses or RS232
Heart bus sends the information comprising feedback command and carries out radiodiagnosis x analysis to central controller, and central controller carries out radiodiagnosis x point
The result of analysis, which changes character string into and is stored in data storage or directly by USB interface, is sent to PC.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (5)
- A kind of 1. simulative automobile communication test device, it is characterised in that：Including USB interface, virtual serial port, central controller, patrol Extending controller, data storage and communications interface unit are collected, the USB interface passes through virtual serial port and the central controller Communication connection, the virtual serial port also communicate to connect with logical extension controller, the central controller and logical extension controller Connection, the logical data communication interface of the central controller, the logic level interface of logical extension controller lead to described respectively Believe interface unit connection, the OBD interfaces connection of communications interface unit and automobile, the data-interface of the central controller, logic The data-interface of extending controller is connected with data storage respectively.
- A kind of 2. simulative automobile communication test device according to claim 1, it is characterised in that：The communications interface unit Including at least CAN interface circuit, RS232 bus interface circuits, RS485 bus interface circuits, K bus interface circuits, One two keys relay, the second two keys relay, the 3rd two keys relay and the 4th two keys relay, the CAN interface electricity The output end on road and the input contact portion of first two keys relay, the output end of the RS232 bus interface circuits With the input contact portion of second two keys relay, the output end of the RS485 bus interface circuits and the described 3rd The input contact portion of two keys relay, the output end of the K bus interface circuits are defeated with the 4th two keys relay Enter terminal contacts connection, first two keys relay output terminal contacts, the second two keys relay output terminal contacts, the 3rd pair Output terminal contacts, the output terminal contacts of the 4th two keys relay of knife relay pass through bus and the hilted broadsword relay group respectively Input contact portion, the output terminal contacts of the hilted broadsword relay group are connected with the OBD interfaces of the automobile, the center The data communication interface of controller passes through first passage the drive circuit control terminal with first two keys relay, second respectively The control terminal of two keys relay, the control terminal of the 3rd two keys relay, the connection of the control terminal of the 4th two keys relay, the logic Extending controller is connected by second channel drive circuit with the control terminal of the hilted broadsword relay group.
- A kind of 3. simulative automobile communication test device according to claim 2, it is characterised in that：The K EBIs electricity Road includes buffering drive circuit, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electricity Hinder R9, resistance R10, resistance R11, resistance R12, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5 and two Pole pipe D1, the input of the buffering drive circuit are connected with the drive output of logical extension controller, buffering drive circuit Output end be connected by resistance R1 with the base stage of the triode Q1, the triode Q1's is emitted through insurance circuit and institute The signal output part connection of logical extension controller is stated, triode Q1 colelctor electrode is connected with resistance R2 one end, and described three Pole pipe Q1 colelctor electrode is also connected with diode D1 negative electrodes, and diode D1 negative electrodes are connected with 5V dc sources, resistance R2's One end with the resistance R3, resistance R4 one end, triode Q2 emitter stage, triode Q3 emitter stage connect the other end respectively Connect, the resistance R3 other end is connected with the base stage of the triode Q2, the resistance R4 other end and institute triode Q3 base Pole connects, and triode Q2 colelctor electrode is connected with resistance R5 one end, the resistance R5 other end respectively with the triode One end connection of Q4 colelctor electrodes, resistance R6, triode Q3 colelctor electrode are connected with resistance R7 one end, and resistance R7's is another One end respectively with the triode Q5 colelctor electrodes, resistance R8 is held to be connected, the base stage of the triode Q4 passes through resistance R9 and the The first control output end connection of one channels drive circuit, the base stage of the triode Q5 are driven by resistance R10 and first passage The second control output end connection of dynamic circuit, the first input end of the other end of the resistance R6 and the 4th two keys relay Contact portion, the second input contact portion of the other end of the resistance R8 and the 4th two keys relay, three pole Pipe Q4 emitter stages are connected to ground by resistance R11, and the triode Q5 emitter stages are connected to ground by resistance R12.
- A kind of 4. simulative automobile communication test device according to claim 2, it is characterised in that：The first passage driving Circuit and second channel drive circuit use ULN2003 drivers.
- A kind of 5. simulative automobile communication test device according to claim 2, it is characterised in that：The CAN interface Circuit is single line CAN bus interface circuit and/or two-wire CAN interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720126220.8U CN206804302U (en) | 2017-02-13 | 2017-02-13 | A kind of simulative automobile communication test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720126220.8U CN206804302U (en) | 2017-02-13 | 2017-02-13 | A kind of simulative automobile communication test device |
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| CN206804302U true CN206804302U (en) | 2017-12-26 |
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| CN201720126220.8U Active CN206804302U (en) | 2017-02-13 | 2017-02-13 | A kind of simulative automobile communication test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650068A (en) * | 2019-10-18 | 2020-01-03 | 湖南小步科技有限公司 | Communication circuit and communication test method of remote controller performance test device |
-
2017
- 2017-02-13 CN CN201720126220.8U patent/CN206804302U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650068A (en) * | 2019-10-18 | 2020-01-03 | 湖南小步科技有限公司 | Communication circuit and communication test method of remote controller performance test device |
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