CN201280106Y

CN201280106Y - Bus line multi-leaving adapter of automotive vehicle

Info

Publication number: CN201280106Y
Application number: CNU200820153347XU
Authority: CN
Inventors: 胡益波; 王晨东
Original assignee: Pan Asia Technical Automotive Center Co Ltd; Shanghai General Motors Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-07-29
Anticipated expiration: 2018-09-18

Abstract

A vehicle bus multi-output adapter comprises an adapter panel, and at least one OBD interface electrically connected with corresponding interface of the adapter panel, wherein a high-speed CAN bus serial port, an intermediate-speed CAN bus serial port, a low-speed CAN bus serial port and a chassis high-speed CAN bus serial port are arranged on the adapter panel; and each serial port is electrically connected with OBD interface. The vehicle bus multi-output adapter can meet the requirement for interfaces of the most of bus test tools on the market and is convenient in switching between each two bus systems. The vehicle bus multi-output adapter has the advantages of simple structure, convenient bus switching without the need of multiple times of plug in and plug out, and greatly improved detection efficiency.

Description

Automobile bus multichannel output adapter

Technical field

The utility model relates to a kind of adapter, particularly relates to a kind of automobile bus multichannel output adapter.

Background technology

Along with the raising of car production technology, increasing automobile begins to use bus system and carries out communication, has so not only increased function, has also reduced the use of wire harness.At present most widely used general, most typical vehicle-mounted bus system has CAN bus and LIN bus etc.Along with the function of automobile is more and more abundanter, the electronic module that automotive interior uses is also just more and more, and different electronic modules needs to rely on dissimilar buses to communicate with one another each other.But the interface between the various buses but is not quite similar, such as, the automobile of the band bus of main flow generally all has the OBD bus interface of 16 pins, and this OBD bus interface is in order to carry out communication and detection with the external test bus instrument; And the bus test instrument of main flow only is equipped with the serial interface of 9 pins as CANoe.Therefore when detecting automotive system, always need the manual wiring of engineer; and the fiduciary level of manual wiring is very poor; often having situation such as open circuit takes place; especially in the automotive development stage; owing to needing frequent plug connector to switch and detecting different bus systems, so be easy to damage vehicle-mounted OBD interface.

In sum, be necessary to design a kind of automobile bus multichannel output adapter to overcome the defective of prior art in fact.

The utility model content

The purpose of automobile bus multichannel output adapter of the present utility model is: provides a kind of convenience between each bus system, to switch and, improves testing efficient its adapter that detects, and not fragile vehicle-borne OBD interface.

In order to achieve the above object, the utility model provides a kind of automobile bus multichannel output adapter:

This automobile bus multichannel output adapter, at least one the OBD interface that comprises the adapter panel, electrically connects with the corresponding interface of described adapter panel, wherein, described adapter panel is provided with high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports, and above-mentioned each serial ports all is electrical connected with described OBD interface.

As preferred implementation, described adapter panel is provided with LIN bus serial ports and LIN bus selection switch, and described LIN bus serial ports and described OBD interface are electrical connected.

As preferred implementation, described adapter panel is provided with and described high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports and the corresponding high-speed CAN bus jack of LIN bus serial ports difference, the total line jack of middling speed CAN, the total line jack of low speed CAN, chassis high-speed CAN bus jack and the total line jack of LIN.

As preferred implementation, be connected by photoelectrical coupler between described OBD interface and described high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports and the LIN bus serial ports.

The beneficial effect of automobile bus multichannel output adapter of the present utility model is: one, can satisfy the interface requirement of present most of bus test instruments on the market, switch between each bus system easily; Two, simple in structure, need not repeatedly to plug the OBD interface, it is convenient to switch bus, improves testing efficient greatly.

Description of drawings

Describe the concrete structure of automobile bus multichannel output adapter of the present utility model in detail below in conjunction with accompanying drawing, wherein:

Fig. 1 is the scheme drawing of automobile bus multichannel output adapter of the present utility model;

Fig. 2 be high-speed CAN bus serial ports, middling speed CAN bus serial ports and chassis high-speed CAN bus serial ports and with the interconnecting wiring diagram of above-mentioned 3 corresponding jacks of serial ports with the OBD interface;

Fig. 3 is low speed CAN bus serial ports and cooresponding jack thereof, and each jack that is provided with in the power supply area is with the interconnecting wiring diagram of OBD interface;

Fig. 4 is LIN bus serial ports and the total line jack of cooresponding LIN thereof the interconnecting wiring diagram with the OBD interface.

The specific embodiment

As shown in Figure 1, automobile bus multichannel output adapter 1 of the present utility model mainly comprises: adapter panel 10, and with the corresponding interface of described adapter panel 10 by at least one OBD interface 12 of lead bonded assembly.Described adapter panel 10 is divided into CAN bus zone 100, LIN bus zone 102 and power supply area 104 these three parts.The OBD interface 12 of automobile bus multichannel output adapter 1 of the present utility model can connect vehicle-mounted OBD interface and other test equipment, such as the NeoVI bus test equipment that uses the OBD interface etc.

In the CAN of described adapter panel 10 bus zone 100, be provided with high-speed CAN bus serial ports 1000, middling speed CAN bus serial ports 1002, low speed CAN bus serial ports 1004, chassis high-speed CAN bus serial ports 1006, and the total line jack 1003 of high-speed CAN bus jack 1001, middling speed CAN, the total line jack 1005 of low speed CAN, the chassis high-speed CAN bus jack 1007 that correspond respectively to above-mentioned each serial ports.Described each jack makes things convenient for probe directly to insert the purpose of acquired signal when being mainly used in the test of testing tools such as multi-meter or oscp and designs.See also Fig. 2 and detailed description thereof for high-speed CAN bus serial ports 1000, middling speed CAN bus serial ports 1002 and chassis high-speed CAN bus serial ports 1006 these 3 bus serial ports and with above-mentioned 3 corresponding jacks of serial ports with the annexation of OBD interface 12.See also Fig. 3 and detailed description thereof for low speed CAN bus serial ports 1004 and cooresponding jack 1005 thereof with the annexation of OBD interface 12.

In the LIN of described adapter panel 10 bus zone 102, be provided with LIN bus serial ports 1020, corresponding to the total line jack 1021 of the LIN of described LIN serial ports 1020.In addition, because therefore the multichannel characteristic of LIN bus also comprises a LIN bus selection switch 1022, only be purpose for example and not limitation, LIN bus selection switch 1022 of the present utility model can be selected 5 road LIN bus signals.The test of testing tool such as multi-meter or oscp for convenience of the total line jack 1021 of described LIN is provided with.For LIN bus serial ports 1020 and the total line jack 1021 of cooresponding LIN thereof the annexation with OBD interface 12, the principle that LIN bus selection switch 1022 switches bus signals sees also Fig. 4 and detailed description thereof.

Be provided with in the power supply area 104 of described adapter panel 10 that LED power light 1040, power supply connect hole 1042, ground wire connects hole 1044 and signal ground connects hole 1046.Also see also Fig. 3 and detailed description thereof for each jack that is provided with in the power supply area 104 with the annexation of OBD interface 12.

For automobile bus multichannel output adapter 1 of the present utility model, should be noted that two problems.The one, isolate, the technical solution adopted in the utility model is all to increase photoelectrical coupler from each road signal wire (SW) that vehicle-mounted OBD interface enters adapter 1, make between its input and output and on electrical property, isolate fully, play the effect of protection vehicle-mounted instrument equipment and improve antijamming capability; The 2nd, prevent to cause signal attenuation the signal attenuation that causes when promptly connecting multichannel OBD equipment because of multi-channel parallel.Be purpose for example and not limitation only, it will be appreciated by those skilled in the art that the adjunction aerotron increases drive current behind photoelectrical coupler, can reach the purpose that increases signal strength, thereby solve the problem of the signal attenuation behind the connection multichannel OBD equipment.

Introduce each bus serial ports and the relation of the wiring between the cooresponding jack thereof on OBD interface 12 and the adapter of the present utility model below in detail.Common vehicle-mounted OBD interface 12 is as shown in table 1 to the definition of its each PIN pin.

Table 1

The PIN pin	Signal	The PIN pin	Signal
The PIN pin	Signal	The PIN pin	Signal		1	Low speed CAN bus	9	The 1 road LIN bus
2	The 2 road LIN bus	10	The 3 road LIN bus		1	Low speed CAN bus	9	The 1 road LIN bus
2	The 2 road LIN bus	10	The 3 road LIN bus	3	Middling speed CAN bus (high level)	11	Middling speed CAN bus (low level)
4	Ground wire	12	Chassis CAN bus (high level)	3	Middling speed CAN bus (high level)	11	Middling speed CAN bus (low level)
4	Ground wire	12	Chassis CAN bus (high level)	5	Signal ground	13	Chassis CAN bus (low level)
6	High-speed CAN bus (high level)	14	High-speed CAN bus (low level)	5	Signal ground	13	Chassis CAN bus (low level)
6	High-speed CAN bus (high level)	14	High-speed CAN bus (low level)	7	The K-Line bus	15	The 4 road LIN bus
8	The 5 road LIN bus	16	Power lead	7	The K-Line bus	15	The 4 road LIN bus

Because the bus test instrument of main flow---as CANoe bus test instrument etc.---all is to adopt 9 needle serial port RS232 to come communication, therefore the PIN pin of 9 needle serial ports is divided into two groups and defines respectively.First group is definition high, middling speed CAN bus, and second group is the definition of low speed CAN bus and LIN bus, as shown in table 2.

The PIN pin	First group of bus definition	The PIN pin	Second group of bus definition
The PIN pin	First group of bus definition	The PIN pin	Second group of bus definition	1		1
2	CAN bus (low level)	2		1		1
2	CAN bus (low level)	2		3	Ground wire	3	Ground wire
4		4		3	Ground wire	3	Ground wire
4		4		5		5
6		6		5		5
6		6		7	CAN bus (high level)	7	Low speed CAN/LIN bus
8		8		7	CAN bus (high level)	7	Low speed CAN/LIN bus
8		8		9		9	Power lead

Please in conjunction with consulting table 1, table 2 and Fig. 2, it will be appreciated by those skilled in the art that described high-speed CAN bus serial ports 1000, middling speed CAN bus serial ports 1002 and chassis high-speed CAN bus serial ports 1006 these 3 bus serial ports and with the wiring relation of above-mentioned 3 corresponding jacks of serial ports with OBD interface 12.By table 1, table 2 and Fig. 3, it will be appreciated by those skilled in the art that described low speed CAN bus serial ports 1004 and cooresponding jack 1005 thereof annexation, and each jack that is provided with in the power supply area 104 is with the annexation of OBD interface 12 with OBD interface 12.And associative list 1, table 2 and Fig. 4 it will be appreciated by those skilled in the art that the annexation of the total line jack 1021 of described LIN bus serial ports 1020 and cooresponding LIN thereof with OBD interface 12.

Claims

1. automobile bus multichannel output adapter, at least one the OBD interface that comprises the adapter panel, electrically connects with the corresponding interface of described adapter panel, it is characterized in that: described adapter panel is provided with high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports, and above-mentioned each serial ports all is electrical connected with described OBD interface.

2. automobile bus multichannel output adapter according to claim 1 is characterized in that: described adapter panel is provided with LIN bus serial ports and LIN bus selection switch, and described LIN bus serial ports and described OBD interface are electrical connected.

3. automobile bus multichannel output adapter according to claim 2 is characterized in that: described adapter panel is provided with and described high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports and the corresponding high-speed CAN bus jack of LIN bus serial ports difference, the total line jack of middling speed CAN, the total line jack of low speed CAN, chassis high-speed CAN bus jack and the total line jack of LIN.

4. according to claim 2 or 3 described automobile bus multichannel output adapters, it is characterized in that: be connected by photoelectrical coupler between described OBD interface and described high-speed CAN bus serial ports, middling speed CAN bus serial ports, low speed CAN bus serial ports, chassis high-speed CAN bus serial ports and the LIN bus serial ports.