CN219676483U - Electronic switch control circuit - Google Patents
Electronic switch control circuit Download PDFInfo
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- CN219676483U CN219676483U CN202320484093.4U CN202320484093U CN219676483U CN 219676483 U CN219676483 U CN 219676483U CN 202320484093 U CN202320484093 U CN 202320484093U CN 219676483 U CN219676483 U CN 219676483U
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- 239000003381 stabilizer Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses an electronic switch control circuit, comprising: the OBD connector is used for being connected with an OBD interface of an automobile and connected with a 12V power supply; the input end of the switching circuit is connected with the first output end of the OBD connector; the first input end of the main control module is connected with the output end of the switch circuit; the input end of the power supply module is connected with the second output end of the OBD connector and is used for supplying power to the whole circuit; according to the technical scheme, the switch circuit is connected with the OBD connector through the arrangement of the plurality of electronic switch switches, the communication pins and the communication protocols are controlled to be switched, the communication connection with the automobile is realized, the relay and the photoelectric coupler are not required to be arranged, the hardware cost is greatly reduced, the size of a circuit board and equipment is reduced, and the electronic switch circuit has good market application value.
Description
Technical Field
The utility model relates to the technical field of automobile communication, in particular to an electronic switch control circuit.
Background
With rapid development of automobiles, there are more and more special devices for providing fault diagnosis for automobiles, and when the devices are used for diagnosing automobiles, the devices need to be matched with a communication protocol of the automobiles so as to interact with a system of the automobiles. The communication protocols and the communication pins used by the automobiles of different models can be different, and the communication interaction between the automobiles and the equipment can be realized only when the communication protocols and the communication pins are matched.
At present, most manufacturers generally adopt a relay and a photoelectric coupler to control and switch communication protocols and pins, and the structure causes overlarge board surface size of a circuit board, so that the whole size of equipment is overlarge, and the generated hardware cost is overlarge.
Accordingly, the prior art has drawbacks and needs improvement.
Disclosure of Invention
In order to solve the above technical problems, an embodiment of the present utility model provides an electronic switch control circuit, including:
the OBD connector is used for being connected with an OBD interface of an automobile and connected with a 12V power supply;
the input end of the switching circuit is connected with the first output end of the OBD connector;
the first input end of the main control module is connected with the output end of the switch circuit;
and the input end of the power supply module is connected with the second output end of the OBD connector and is used for supplying power to the whole circuit.
Optionally, the switch circuit includes first communication circuit, second communication circuit, third communication circuit and fourth communication circuit, first communication circuit, second communication circuit, third communication circuit and fourth communication circuit's input all with the first output of OBD joint is connected, and the output all is connected with main control module's first input.
Optionally, the first communication circuit includes first electronic switch and OBD communication chip, the input of first electronic switch is connected with the first output that OBD connects, the output with the first input of OBD communication chip is connected, the output of OBD chip is connected with main control module's first input.
Optionally, the second communication circuit includes a second electronic switch and a first CAN transceiver, an input end of the second electronic switch is connected with a first output end of the OBD connector, a first input end of the first CAN transceiver is connected with an output end of the second electronic switch, and an output end of the first CAN transceiver is connected with a first input end of the main control module.
Optionally, the third communication circuit includes a third electronic switch and a second CAN transceiver, an input end of the third electronic switch is connected with a first output end of the OBD connector, a first input end of the second CAN transceiver is connected with an output end of the third electronic switch, and an output end of the second CAN transceiver is connected with a first input end of the main control module.
Optionally, the fourth communication circuit includes a fourth electronic switch and a comparator, an input end of the fourth electronic switch is connected with a first output end of the OBD connector, a first input end of the comparator is connected with an output end of the fourth electronic switch, and an output end of the comparator is connected with a first input end of the main control module.
Optionally, the device further comprises a booster circuit, wherein the input end of the booster circuit is connected with the first output end of the power module, and the output end of the booster circuit is connected with the second input end of the OBD communication chip.
Optionally, the device further comprises a voltage reduction circuit and a linear voltage stabilizer, wherein the input end of the voltage reduction circuit is connected with the second output end of the power supply module, the input end of the linear voltage stabilizer is connected with the output end of the voltage reduction circuit, the first output end of the linear voltage stabilizer is connected with the second input end of the main control chip, the second output end is connected with the second input end of the first transceiver, the third output end is connected with the second input end of the second transceiver, and the third output end is connected with the second input end of the comparator.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages:
according to the technical scheme, the switch circuit is connected with the OBD connector through the arrangement of the plurality of electronic switch switches, the communication pins and the communication protocols are controlled to be switched, the communication connection with the automobile is realized, the relay and the photoelectric coupler are not required to be arranged, the hardware cost is greatly reduced, the size of a circuit board and equipment is reduced, and the electronic switch circuit has good market application value.
Drawings
FIG. 1 is a schematic diagram of the overall block diagram of the electronic switch control circuit of the present utility model;
FIG. 2 is a schematic diagram of an OBD communication chip according to the present utility model;
FIG. 3 is a schematic diagram of a first electronic switch circuit according to the present utility model;
fig. 4 is a circuit schematic diagram of a main control module according to the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "fixed," "integrally formed," "left," "right," and the like are used herein for descriptive purposes only and in the drawings like elements are identified by the same reference numerals.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
The present utility model will be described in detail with reference to the accompanying drawings.
Embodiment one:
as shown in fig. 1-4, the present utility model proposes an electronic switch control circuit comprising:
the OBD connector is used for being connected with an OBD interface of an automobile and connected with a 12V power supply;
the input end of the switching circuit is connected with the first output end of the OBD connector;
the first input end of the main control module is connected with the output end of the switch circuit;
and the input end of the power supply module is connected with the second output end of the OBD connector and is used for supplying power to the whole circuit.
Further, the OBD connector is connected with an OBD interface of the automobile, and it can be understood that a diagnosis line is arranged between the OBD connector and the OBD interface, one end of the diagnosis line is connected with the OBD connector, the other end of the diagnosis line is connected with the OBD interface of the automobile, and the automobile provides 12V power supply voltage for the circuit after the diagnosis line is communicated with the OBD interface; the switch circuit is arranged between the OBD connector and the main control module, and is used for receiving an instruction of the main control module and information of the automobile when the switch circuit is conducted; the main control module is used for sending instructions and analyzing and processing received automobile information, and the model of the main control module is GD32F405VGH.
Optionally, the switch circuit includes first communication circuit, second communication circuit, third communication circuit and fourth communication circuit, first communication circuit, second communication circuit, third communication circuit and fourth communication circuit's input all with the first output of OBD joint is connected, and the output all is connected with main control module's first input.
Further, the communication protocols of the vehicles commonly used in the market are multiple (for example, protocols of CAN, KLINE, J1850, J1708, etc.), the pins of the vehicles of different models for communication may be different, and when the OBD connector is connected with the OBD interface of the vehicle, the main control module controls the first communication circuit, the second communication circuit, the third communication circuit and the fourth communication circuit to be turned on and off, so as to realize communication connection with the vehicle.
Optionally, the first communication circuit includes first electronic switch and OBD communication chip, the input of first electronic switch is connected with the first output that OBD connects, the output with the first input of OBD communication chip is connected, the output of OBD chip is connected with main control module's first input.
Further, the first electronic switch comprises two triodes and four MOS pipes, the pin 2 of triode is connected with main control module, the pin 3 of two MOS pipes is connected with OBD connects, the pin 6 of two MOS pipes is connected with OBD communication chip, when main control module gives the pin 2 high level of triode, the base voltage of triode is high, collector voltage draws down, the voltage of the pin 5 of triode draws down, the projecting pole electric current flow direction collecting electrode, the grid of four MOS pipes is high this moment, drain electrode and drain electrode switch on, first electronic switch switches on.
Further, the model of the OBD communication chip is JV700.
Optionally, the second communication circuit includes a second electronic switch and a first CAN transceiver, an input end of the second electronic switch is connected with a first output end of the OBD connector, a first input end of the first CAN transceiver is connected with an output end of the second electronic switch, and an output end of the first CAN transceiver is connected with a first input end of the main control module.
Further, the second electronic switch is identical to the first electronic switch in structure. The model of the first CAN transceiver is TJA1044T/1.
Optionally, the third communication circuit includes a third electronic switch and a second CAN transceiver, an input end of the third electronic switch is connected with a first output end of the OBD connector, a first input end of the second CAN transceiver is connected with an output end of the third electronic switch, and an output end of the second CAN transceiver is connected with a first input end of the main control module.
Further, the third electronic switch is identical to the first electronic switch in structure. The model of the second CAN transceiver is TJAT055T.
Optionally, the fourth communication circuit includes a fourth electronic switch and a comparator, an input end of the fourth electronic switch is connected with a first output end of the OBD connector, a first input end of the comparator is connected with an output end of the fourth electronic switch, and an output end of the comparator is connected with a first input end of the main control module.
Further, the fourth electronic switch is identical to the first electronic switch in structure. The comparator is model LM393.
Optionally, the device further comprises a booster circuit, wherein the input end of the booster circuit is connected with the first output end of the power module, and the output end of the booster circuit is connected with the second input end of the OBD communication chip.
Further, the boost circuit is used for boosting the accessed 12V voltage to 13.5V and outputting the voltage to the OBD communication chip.
Optionally, the device further comprises a voltage reduction circuit and a linear voltage stabilizer, wherein the input end of the voltage reduction circuit is connected with the second output end of the power supply module, the input end of the linear voltage stabilizer is connected with the output end of the voltage reduction circuit, the first output end of the linear voltage stabilizer is connected with the second input end of the main control chip, the second output end is connected with the second input end of the first transceiver, the third output end is connected with the second input end of the second transceiver, and the third output end is connected with the second input end of the comparator.
Further, the voltage-reducing circuit is used for reducing the voltage of 12V to 5V and then outputting the voltage, and then reducing the voltage of 5V to 3.3V through the linear voltage stabilizer.
The above-described features are continuously combined with each other to form various embodiments not listed above, and are regarded as the scope of the present utility model described in the specification; and, it will be apparent to those skilled in the art from this disclosure that modifications and variations can be made without departing from the scope of the utility model defined in the appended claims.
Claims (8)
1. An electronic switch control circuit, comprising:
the OBD connector is used for being connected with an OBD interface of an automobile and connected with a 12V power supply;
the input end of the switching circuit is connected with the first output end of the OBD connector;
the first input end of the main control module is connected with the output end of the switch circuit;
and the input end of the power supply module is connected with the second output end of the OBD connector and is used for supplying power to the whole circuit.
2. The electronic switch control circuit of claim 1, wherein the switch circuit comprises a first communication circuit, a second communication circuit, a third communication circuit, and a fourth communication circuit, wherein the inputs of the first communication circuit, the second communication circuit, the third communication circuit, and the fourth communication circuit are connected to the first output of the OBD connector, and the outputs are connected to the first input of the master control module.
3. The electronic switch control circuit of claim 2, wherein the first communication circuit comprises a first electronic switch and an OBD communication chip, an input of the first electronic switch is connected to a first output of the OBD connector, an output of the first electronic switch is connected to a first input of the OBD communication chip, and an output of the OBD communication chip is connected to a first input of the master control module.
4. The electronic switch control circuit of claim 3, wherein the second communication circuit comprises a second electronic switch and a first CAN transceiver, wherein an input of the second electronic switch is connected to the first output of the OBD connector, wherein a first input of the first CAN transceiver is connected to an output of the second electronic switch, and wherein an output is connected to the first input of the master control module.
5. The electronic switch control circuit of claim 4, wherein the third communication circuit comprises a third electronic switch and a second CAN transceiver, wherein an input of the third electronic switch is connected to the first output of the OBD connector, a first input of the second CAN transceiver is connected to an output of the third electronic switch, and an output is connected to the first input of the master control module.
6. The electronic switch control circuit of claim 5, wherein the fourth communication circuit comprises a fourth electronic switch and a comparator, wherein an input of the fourth electronic switch is connected to the first output of the OBD connector, a first input of the comparator is connected to an output of the fourth electronic switch, and an output is connected to the first input of the master control module.
7. The electronic switch control circuit of claim 3, further comprising a boost circuit having an input coupled to the first output of the power module and an output coupled to the second input of the OBD communication chip.
8. The electronic switch control circuit of claim 6, further comprising a buck circuit and a linear voltage regulator, wherein an input of the buck circuit is coupled to the second output of the power module, an input of the linear voltage regulator is coupled to an output of the buck circuit, a first output of the linear voltage regulator is coupled to the second input of the master control chip, a second output is coupled to the second input of the first transceiver, a third output is coupled to the second input of the second transceiver, and a third output is coupled to the second input of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320484093.4U CN219676483U (en) | 2023-03-14 | 2023-03-14 | Electronic switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320484093.4U CN219676483U (en) | 2023-03-14 | 2023-03-14 | Electronic switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219676483U true CN219676483U (en) | 2023-09-12 |
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ID=87923815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320484093.4U Active CN219676483U (en) | 2023-03-14 | 2023-03-14 | Electronic switch control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219676483U (en) |
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2023
- 2023-03-14 CN CN202320484093.4U patent/CN219676483U/en active Active
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