CN201716590U - Automatic automobile bus switching instrument - Google Patents
Automatic automobile bus switching instrument Download PDFInfo
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- CN201716590U CN201716590U CN2009202867523U CN200920286752U CN201716590U CN 201716590 U CN201716590 U CN 201716590U CN 2009202867523 U CN2009202867523 U CN 2009202867523U CN 200920286752 U CN200920286752 U CN 200920286752U CN 201716590 U CN201716590 U CN 201716590U
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Abstract
The utility model relates to an automatic automobile bus switching instrument, which comprises a power converting circuit, a control unit, a dial switch and an analogue switching group. One end of the power converting circuit is connected with an automobile-mounted power source while the other end of the power converting circuit is connected with a power interface of the control unit, one end of the control unit is connected with the dial switch while the other end is connected with a control end of the analogue switching group, and one end of the analogue switching group is connected with an automobile-mounted diagnose interface while the other end is connected with an interface of an automobile diagnose tool. The automatic automobile bus switching instrument is convenient for switching when accessing different buses, when the automatic automobile bus switching instrument switches to a new bus connection form, connection between diagnose equipment and a new bus is completely turned on, and connection between the diagnose equipment and the original bus is completely turned off. The automatic automobile bus switching instrument smoothly reads data on different buses smoothly on the one hand, and avoids mutual interference of signals on different buses on the other hand.
Description
Technical field
The utility model relates to a kind of automobile bus automatic switchover instrument.
Background technology
The engineering truck of debugging in the daily EWT work, maintaining comprises all platforms and different automobile types equally, the framework form difference of the car load communication of various vehicles, and, different its bus forms of vehicle platform is also different, and the also corresponding appearance of the pinout of OBD (On-Board Diagnostics, OBD) interface changes.
But the interface definition of vehicle diagnostics instrument is all fixed, when the different bus form of diagnosis, with the interface of vehicle body can't be corresponding flexibly.The method that solve this moment just can only be changed body harness, or changes diagnostic device, and the two all very bothers.Therefore need the equipment that a kind ofly can between different interface definitions, change, make it to adapt to various platforms and vehicle mutually badly and solve this problem.
At present, there is a kind of switching device to comprise an OBD male connector, two standard diagnostics mouths, also has a signal allocation and signal to draw terminal box.But signal allocation and signal outlet box volume are big, weight is heavier, are not suitable for carrying, and when in use needing to switch, every signal wire all needs manually to connect with wire jumper, and is very inconvenient.
Another kind of bus switching equipment comprises at different OBD II interface definitions and makes corresponding male connector, these pins all is parallel on the same female connector again, is connected with diagnostic device.This method uses more convenient and manufacturing cost is extremely low.But the problem of this settling mode also clearly, because all signals all are connected in parallel, when the new bus of conducting, bus originally can't be turn-offed.When data volume is very big, just cause interference so easily.
The utility model content
At the defective of prior art, the purpose of this utility model provides and a kind ofly can be implemented in the automobile bus automatic switchover instrument that switches between the different bus interface easily.
Automobile bus automatic switchover instrument of the present utility model comprises power-switching circuit, control module, toggle switch, analog switch group.Wherein, an end of described power-switching circuit is connected with the vehicle power of automobile, and the other end of power-switching circuit is connected with the power interface of control module; Described control module one end connects toggle switch, and the other end connects the control end of simulation switches set; One end of analog switch group is connected with the On-Board Diagnostics (OBD) interface of automobile, and the other end is connected with the interface of vehicle diagnostics instrument.
Preferably, described analog switch group comprises MAX4661 analog switch or MAX4662 analog switch.
Preferably, input end, the output terminal at power-switching circuit all is parallel with filter capacitor.
Preferably, toggle switch is connected with the LED lamp.
Preferably, the input end of described power-switching circuit is connected with the On-Board Diagnostics (OBD) interface of automobile.
With respect to prior art, bus of the present utility model is switched instrument can be implemented in freely switching between the multiple buses such as GMLAN, chassis bus, KeyWord 2000 buses, when visiting different buses, can switch easily; When switching to new bus type of attachment, be connected complete conducting between diagnostic device and the new bus, be connected then with original bus and disconnect fully.Successfully read the data on the different bus on the one hand, avoided the signal on the different bus to interfere with each other on the other hand.
Description of drawings
Fig. 1 is the system architecture synoptic diagram that the automobile bus in a kind of embodiment of the utility model switches instrument;
Fig. 2 is the schematic diagram of power-switching circuit in a kind of embodiment of the utility model;
Fig. 3 is a schematic diagram of realizing steering logic in a kind of embodiment of the utility model.
Embodiment
In a kind of embodiment of the utility model, automobile bus switches instrument and comprises power-switching circuit 101, control module 102, toggle switch 103 and analog switch group 104.
One end of described power-switching circuit 101 is connected with the vehicle power of automobile, and the other end of power-switching circuit 101 is connected with the power interface of control module 102.The input end of power-switching circuit 101 can be connected on the On-Board Diagnostics (OBD) interface, and vehicle-mounted 12V power supply is converted into the 5V power supply, switches instrument for whole automobile bus logic power is provided.Be simplified design, conserve space, power-switching circuit 101 is preferably 12V-5V switch power module A1, as shown in Figure 2.A1 is switch power module among the figure, and power is 2W.Preferably, connect filter capacitor C1, C2 at input end, output terminal.
One end of described control module 102 connects toggle switch 103, and the other end connects the control end of simulation switches set.The toggle switch signal extension that control module 102 is used for one is the control signal of a plurality of passages of analog switch.Control module 102 can be realized by latch, for example realizes by 74LS244.
In one embodiment, as shown in Figure 3, J1, J2, J3 are toggle switch, and J1, J2, J3 represent respectively and chassis bus interface, ABS bus, setting when the SDM bus is connected.The toggle switch signal is anti-phase by not gate U1A, U1B, U1C respectively, obtains reverse signal, again with the input end of reverse signal input latch U1, U2, U3, simultaneously with the Enable Pin of the switching signal input latch of forward.When needs are connected certain bus, corresponding toggle switch is pushed aside; Switching signal output " 0 ", latch enable; Latch exports control signal in each passage of analog switch group 104.Preferably, each toggle switch has all connected a LED, to show current state.
One end of analog switch group 104 is connected with the On-Board Diagnostics (OBD) interface of automobile, and the other end is connected with the interface of vehicle diagnostics instrument.Present embodiment adopts analog switch as main bus switch spare.Analog switch combines the advantage of digital device and analog device, can utilize digital signal to realize the conducting and the shutoff of switch passage easily, and to the signal type of the switch of flowing through without any restriction.
But the traditional analog switch have certain turn-on and turn-off resistance sometimes, and resistance value may change with the variation of chip power voltage owing to be not mechanical contact.Therefore, preferably, the analog switch in the analog switch group 104 comprises any one among MAX4661 or the MAX4662.MAX4661,4662 is respectively 4 passages, and normally closed/Chang Kaimo intends switch, and conducting resistance only is 3 Europe, closes resistance break and then reaches mega-ohms, therefore can meet the demands admirably.
Preferably, compatible TTL of the control end of analog switch group 104 and CMOS level, thereby convenient control.
Each passage of analog switch group 104 all has a control end.To the MAX4661 analog switch, because MAX4661 is a normally closed switch, when the control end input control signal " 0 " of analog switch, switch closure, passage conducting; When input logic " 1 ", switch opens, passage turn-offs.To normal open switch MAX4662, steering logic is just in time opposite.By combination, determine the OBD II joint that each passage connects respectively and the pin number of diagnostic equipment joint, can determine the required control level of each control end under the different bus form.
In above-mentioned preferred implementation, use high performance analog switch MAX4661, MAX4662 as main switching device, switch by corresponding logic, realize each passage, thereby finish switching the different bus form with several simple toggle switch control analog switches.
Although the utility model is described by above-mentioned preferred implementation, its way of realization is not limited to above-mentioned embodiment.Should be realized that under the situation that does not break away from the utility model purport, those skilled in the art can make different variations and modification to the utility model.
Claims (5)
1. an automobile bus automatic switchover instrument is characterized in that, described automobile bus automatic switchover instrument comprises power-switching circuit, control module, toggle switch, analog switch group,
One end of described power-switching circuit is connected with the vehicle power of automobile, and the other end of power-switching circuit is connected with the power interface of control module;
Described control module one end connects toggle switch, and the other end connects the control end of simulation switches set;
One end of analog switch group is connected with the On-Board Diagnostics (OBD) interface of automobile, and the other end is connected with the interface of vehicle diagnostics instrument.
2. automobile bus automatic switchover instrument according to claim 1 is characterized in that described analog switch group comprises MAX4661 analog switch or MAX4662 analog switch.
3. automobile bus automatic switchover instrument according to claim 1 is characterized in that, all is parallel with filter capacitor at input end, the output terminal of power-switching circuit.
4. automobile bus automatic switchover instrument according to claim 3 is characterized in that toggle switch is connected with the LED lamp.
5. automobile bus automatic switchover instrument according to claim 3 is characterized in that, the input end of described power-switching circuit is connected with the On-Board Diagnostics (OBD) interface of automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202867523U CN201716590U (en) | 2009-12-28 | 2009-12-28 | Automatic automobile bus switching instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202867523U CN201716590U (en) | 2009-12-28 | 2009-12-28 | Automatic automobile bus switching instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201716590U true CN201716590U (en) | 2011-01-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202867523U Expired - Fee Related CN201716590U (en) | 2009-12-28 | 2009-12-28 | Automatic automobile bus switching instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN201716590U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385382A (en) * | 2011-10-24 | 2012-03-21 | 力帆实业(集团)股份有限公司 | Vehicle fault diagnosis device |
| CN102419595A (en) * | 2011-10-31 | 2012-04-18 | 深圳市元征软件开发有限公司 | Vehicular multi-system monitoring device |
| CN105223944A (en) * | 2014-07-07 | 2016-01-06 | 联车（上海）信息科技有限公司 | The vehicle data acquisition equipment of a kind of adaptive OBD II interface and the multiple automobile bus of self-adaptation and diagnosing protocol |
| CN106066614A (en) * | 2016-07-12 | 2016-11-02 | 上海健康医学院 | The digitized method to set up that a kind of Circuits System selects |
| CN108924170A (en) * | 2018-09-21 | 2018-11-30 | 深圳市领世达科技有限公司 | Vehicle data conversion equipment |
| CN109240260A (en) * | 2018-08-17 | 2019-01-18 | 广州瑞修得信息科技有限公司 | Automatically switch the remote fault diagnosis method with free configuration protocol based on bus |
| CN109358610A (en) * | 2018-12-10 | 2019-02-19 | 上海星融汽车科技有限公司 | The detection method of vehicle diagnostic equipment |
-
2009
- 2009-12-28 CN CN2009202867523U patent/CN201716590U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385382A (en) * | 2011-10-24 | 2012-03-21 | 力帆实业(集团)股份有限公司 | Vehicle fault diagnosis device |
| CN102385382B (en) * | 2011-10-24 | 2014-01-08 | 力帆实业(集团)股份有限公司 | Vehicle fault diagnosis device |
| CN102419595A (en) * | 2011-10-31 | 2012-04-18 | 深圳市元征软件开发有限公司 | Vehicular multi-system monitoring device |
| CN105223944A (en) * | 2014-07-07 | 2016-01-06 | 联车（上海）信息科技有限公司 | The vehicle data acquisition equipment of a kind of adaptive OBD II interface and the multiple automobile bus of self-adaptation and diagnosing protocol |
| CN106066614A (en) * | 2016-07-12 | 2016-11-02 | 上海健康医学院 | The digitized method to set up that a kind of Circuits System selects |
| CN109240260A (en) * | 2018-08-17 | 2019-01-18 | 广州瑞修得信息科技有限公司 | Automatically switch the remote fault diagnosis method with free configuration protocol based on bus |
| CN108924170A (en) * | 2018-09-21 | 2018-11-30 | 深圳市领世达科技有限公司 | Vehicle data conversion equipment |
| CN108924170B (en) * | 2018-09-21 | 2024-04-23 | 深圳市领世达科技有限公司 | Vehicle data conversion device |
| CN109358610A (en) * | 2018-12-10 | 2019-02-19 | 上海星融汽车科技有限公司 | The detection method of vehicle diagnostic equipment |
| CN109358610B (en) * | 2018-12-10 | 2021-02-05 | 上海星融汽车科技有限公司 | Detection method of vehicle diagnostic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20161228 |