CN208459845U - A kind of automobile bus communication wire selection system of 38PIN interface - Google Patents
A kind of automobile bus communication wire selection system of 38PIN interface Download PDFInfo
- Publication number
- CN208459845U CN208459845U CN201820333832.9U CN201820333832U CN208459845U CN 208459845 U CN208459845 U CN 208459845U CN 201820333832 U CN201820333832 U CN 201820333832U CN 208459845 U CN208459845 U CN 208459845U
- Authority
- CN
- China
- Prior art keywords
- 38pin
- switch array
- unit
- multiplexer switch
- connector
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of automobile bus communication wire selection system of 38PIN interface, comprising: 38PIN connector, the multiplexer switch array connecting with 38PIN connector, the series transition unit connecting with multiplexer switch array, the level conversion unit connecting with series transition unit and 16 needle OBD connectors connecting with level conversion unit；Multiplexer switch array is also connect with 16 needle OBD connectors, series transition unit by from 16 needle OBD connectors and through level conversion unit conversion data-signal carry out serioparallel exchange, and the signal after conversion is supplied to multiplexer switch array, the selector control signal as multiplexer switch array.The utility model is by turning selector control simultaneously using the route selection of multiplexer switch array and string, so that BENZ38 connector can be achieved with the diagnosis and repair of any vehicle electric-control system of BENZ38 in the case where being not necessarily to various huge relay route selections or CPLD signal drive circuit, reduce cost, reduce volume, it is light and handy exquisite, it is reliable and stable.
Description
Technical field
The utility model relates to onboard diagnostic device technical field more particularly to a kind of automobile bus of 38PIN interface are logical
Believe wire selection system.
Background technique
Enter ECU (the Electronic Control Unit) control period from automobile the 1980s, it is big with the U.S. three
Motor corporation is that the automaker of representative begins to monitor automotive control system with ECU.But the ECU and fault diagnosis of each manufacturer
Equipment is respectively developed by each automaker, diagnoses interface and communication mode is different, cannot be general mutually.
1994 AIAE American institute of automobile engineers (SAE) propose the second generation with vehicle self-diagnosable system (OBD-II, On-
Board Diagnostic II) standard criterion, as time goes by, vehicle diagnosis mode and diagnostic socket are gradually advised
Model makes it possible that single face form is realized and carries out fault diagnosis to the different electric-control systems of more vehicle systems.
The comprehensive diagnos equipment of existing market is all made of the interface shape of (OBD-II, On-Board Diagnostic II)
Formula, but one main brand of market benz (BENZ) early stage vehicle uses 38PIN interface form, is thus extended to OBD-II
BENZ38 interface form becomes a reality demand.
KWP communication line is mainly extended to the needs for meeting 38PIN connector by the realization that OBD-II turns BENZ38 interface.
The implementation of existing market mainstream BENZ38 Interface Expanding connector has following two:
1, relay scheme: the program needs 36 route selection relays, therefore it is big to will lead to equipment volume, at high cost, weight
The problems such as amount weight, relay drive circuit is too fat to move；
2, CPLD scheme: the program is by Complex Programmable Logic Devices (CPLD, Complex Programmable Logic
Device signal route selection) is realized, more above-mentioned relay scheme has a degree of change in volume, weight and cost
It is kind, but since the repetition that 36 road signals drove and received circuit is too fat to move, limited improvement can only be known as.
Therefore, the prior art is defective, needs to improve.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of automobile bus communication of 38PIN interface
Wire selection system.
The technical solution of the utility model is as follows: the utility model provides a kind of automobile bus communication choosing of 38PIN interface
Linear system system, comprising: 38PIN connector, the multiplexer switch array connecting with the 38PIN connector are opened with the multiplexing
The series transition unit for closing array connection, the level conversion unit that is connect with the series transition unit and with the level conversion
16 needle OBD connectors of unit connection；The multiplexer switch array is also connect with the 16 needle OBD connector, and the string turns simultaneously
Unit by from 16 needle OBD connectors and through level conversion unit conversion data-signal carry out serioparallel exchange, and will conversion after
Signal be supplied to multiplexer switch array, the selector control signal as multiplexer switch array.
The automobile bus communication wire selection system of the 38PIN interface further includes a power supply unit, the power supply unit difference
It is connect with 38PIN connector, multiplexer switch array, series transition unit, level conversion unit and 16 needle OBD connectors.
The series transition unit is turned using the string of model 74HC164 and chip.
The multiplexer switch array uses the chip of model DG408DVZ.
The series transition unit and level conversion unit will be from tri- data lines of PWM, KWP, L of 16 needle OBD connectors
Data-signal carry out level conversion and serioparallel exchange.
Using the above scheme, the utility model provides a kind of automobile bus communication wire selection system of 38PIN interface, by answering
Turn selector control simultaneously with the route selection of multiplexer switch array and string, so that BENZ38 connector is being not necessarily to various huge relays
Can be achieved with the diagnosis and repair of any vehicle electric-control system of BENZ38 in the case where route selection or CPLD signal drive circuit, reduce at
This, reduces volume, light and handy exquisite, reliable and stable.
Detailed description of the invention
Fig. 1 is that the automobile bus of the utility model 38PIN interface communicates the functional framework figure of wire selection system.
Fig. 2 is the schematic diagram of one embodiment of multiplexer switch array in the utility model.
Fig. 3 is the schematic diagram of one embodiment of series transition unit in the utility model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Referring to Fig. 1, the utility model provides a kind of automobile bus communication wire selection system of 38PIN interface, it is applied to vapour
The general self-service diagnostic device of vehicle carries out data transmission with BENZ38 interface, is switched using analog multiplexer and realizes route selection, only needed
Electrical characteristic is selected to meet several TSSOP multiplexer switch of semaphore request, selector control signal uses on OBD-II
KWP and PWM is not necessarily to relay drive circuit through serioparallel exchange, without signal drive circuit, therefore the size of connector,
Weight, cost are remarkably decreased.When using the wire selection system, diagnosis interface circuit generates signal of communication under MCU control and includes:
BUS+, BUS- (SAEJ1850), KWP (Key Word Protocol), CAN (Control Area Net) etc.；Protocol type packet
It includes: SAEJ1850PWM, SAEJ1850VPW, KWP2000, ISO9141-2, ISO-15765CAN.
The communication wire selection system include: 38PIN connector, the multiplexer switch array being connect with the 38PIN connector, with
The series transition unit of multiplexer switch array connection, the level conversion unit being connect with the series transition unit and
16 needle OBD connectors being connect with the level conversion unit；The multiplexer switch array also connects with the 16 needle OBD connector
It connects, the series transition unit will be from 16 needle OBD connectors and the data-signal converted through level conversion unit is gone here and there and turned
It changes, and the signal after conversion is supplied to multiplexer switch array, the selector control signal as multiplexer switch array.
Automobile bus communication wire selection system further includes a power supply unit, the power supply unit respectively with 38PIN connector,
Multiplexer switch array, series transition unit, level conversion unit and 16 needle OBD connectors connection, with provide working power to
Modules.
The series transition unit and level conversion unit will be from tri- data lines of PWM, KWP, L of 16 needle OBD connectors
Data-signal carry out level conversion and serioparallel exchange.The selector control that multiplexer switch array is provided according to series transition unit
Signal, any communication pin gated on BENZ vehicle 38PIN connector are connect with the OBD-K1 of 16 needle OBD connectors, complete data
Communication and corresponding functional diagnosis.
In the present embodiment, the series transition unit selects the string of model 74HC164 to turn simultaneously chip, the multiplexing
The chip of switch arrays selection model DG408DVZ.As shown in Fig. 2, K_1 is multiplexed signals, B4 to B11 is extension connecting pin,
A0, A1, A2, EN are selector control signal.More signal multiplexing circuits can and so on.As shown in figure 3, K-11, L turn through level
Change unit carry out level conversion after respectively from DS_164 and MR_164 access chip DG408DVZ, BUS- be directly used as displacement when
Clock.
In conclusion the utility model provides a kind of automobile bus communication wire selection system of 38PIN interface, it is more by application
Road multiplex switch array route selection and string turn selector control simultaneously, so that BENZ38 connector is being not necessarily to various huge relay route selections
Or can be achieved with the diagnosis and repair of any vehicle electric-control system of BENZ38 in the case where CPLD signal drive circuit, cost is reduced,
Reduce volume, it is light and handy exquisite, it is reliable and stable.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.
Claims (5)
1. the automobile bus of 38PIN interface a kind of communicates wire selection system characterized by comprising 38PIN connector, with it is described
38PIN connector connection multiplexer switch array, connect with the multiplexer switch array series transition unit, with it is described
The level conversion unit of series transition unit connection and 16 needle OBD connectors being connect with the level conversion unit；The multichannel
Multiplex switch array is also connect with the 16 needle OBD connector, and the series transition unit will be from 16 needle OBD connectors and through level
The data-signal of converting unit conversion carries out serioparallel exchange, and the signal after conversion is supplied to multiplexer switch array, makees
For the selector control signal of multiplexer switch array.
2. the automobile bus of 38PIN interface according to claim 1 communicates wire selection system, which is characterized in that further include one
Power supply unit, the power supply unit respectively with 38PIN connector, multiplexer switch array, series transition unit, level conversion unit
And 16 needle OBD connector connection.
3. the automobile bus of 38PIN interface according to claim 1 communicates wire selection system, which is characterized in that the string turns
And unit is turned using the string of model 74HC164 and chip.
4. the automobile bus of 38PIN interface according to claim 1 communicates wire selection system, which is characterized in that the multichannel
Multiplex switch array uses the chip of model DG408DVZ.
5. the automobile bus of 38PIN interface according to claim 1 communicates wire selection system, which is characterized in that the string turns
And unit and level conversion unit will carry out electricity from the data-signal of tri- data lines of PWM, KWP, L of 16 needle OBD connectors
Flat turn is changed and serioparallel exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333832.9U CN208459845U (en) | 2018-03-12 | 2018-03-12 | A kind of automobile bus communication wire selection system of 38PIN interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333832.9U CN208459845U (en) | 2018-03-12 | 2018-03-12 | A kind of automobile bus communication wire selection system of 38PIN interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208459845U true CN208459845U (en) | 2019-02-01 |
Family
ID=65155273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820333832.9U Withdrawn - After Issue CN208459845U (en) | 2018-03-12 | 2018-03-12 | A kind of automobile bus communication wire selection system of 38PIN interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208459845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255160A (en) * | 2018-03-12 | 2018-07-06 | 深圳市博诺技术有限公司 | The automobile bus communication wire selection system and method for a kind of 38PIN interfaces |
-
2018
- 2018-03-12 CN CN201820333832.9U patent/CN208459845U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255160A (en) * | 2018-03-12 | 2018-07-06 | 深圳市博诺技术有限公司 | The automobile bus communication wire selection system and method for a kind of 38PIN interfaces |
| CN108255160B (en) * | 2018-03-12 | 2023-09-08 | 深圳市博诺技术有限公司 | 38PIN interface automobile bus communication line selection system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20230908 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20230908 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |