Communication circuit, communication system and vehicle

Abstract

The utility model discloses a communication circuit, a communication system and a vehicle. The communication circuit comprises a transmitting module, a receiving module and a power supply module; the transmitting module is used for outputting a trigger signal according to an external operation signal; the power supply module outputs a first power signal, is connected with the transmitting module and is used for supplying power to the transmitting module, and the voltage value of the first power signal meets a first preset value; the receiving module comprises a low-voltage-drop isolation unit, the low-power isolation unit is connected with the transmitting module and the power supply module, the low-voltage-drop isolation unit is used for isolating the first power supply signal, and the receiving module is used for identifying the trigger signal. The communication circuit provided by the utility model is simple in structure and high in communication stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle body communication technical field especially relates to a communication circuit, communication system and vehicle. BACKGROUND

[0002] Vehicle body communication refers to the communication and data sharing between various electronic devices in the automobile and is an important component of modern automobile electronic systems.

[0003] Current vehicle body communication is mainly based on CAN bus or LIN bus, which requires an additional CAN / LIN transceiver chip, resulting in complex communication lines and high cost. SUMMARY

[0004] The utility model provides a communication circuit, communication system and vehicle to solve the problem of complex communication lines and high cost in prior art.

[0005] According to an aspect of the utility model, a communication circuit is provided, which comprises a transmitting module, a receiving module and a power supply module.

[0006] The transmitting module is configured to output a trigger signal according to an external operation signal.

[0007] The power supply module outputs a first power supply signal, and is connected to the transmitting module.

[0008] The receiving module comprises a low-voltage isolation unit, which is connected to the transmitting module and the power supply module.

[0009] Optionally, the transmitting module comprises a switching unit and a first control unit.

[0010] Optionally, the switching unit comprises a first transistor.

[0011] Optionally, the power supply module comprises a current limiting unit and a first power supply end, a first end of the current limiting unit is connected to the first power supply end, a second end of the current limiting unit is connected to the transmitting module, and the first power supply end is configured to output the first power supply signal meeting the first preset value, and the current limiting unit is configured to limit the current of the signal output by the first power supply end.

[0012] Optionally, the current limiting unit comprises a first resistor, a first end of the first resistor is connected to the first end of the current limiting unit, and a second end of the first resistor is connected to the second end of the current limiting unit.

[0013] Optionally, the receiving module further comprises a pull-up unit and a second control unit, the pull-up unit is connected to the second control unit and the low-voltage drop isolation unit, the pull-up unit is configured to clamp the signal of the receiving end of the second control unit, and the second control unit is configured to identify the trigger signal according to the signal of the receiving end.

[0014] Optionally, the low-voltage drop isolation unit comprises a Schottky diode, a first end of the Schottky diode is connected to the transmitting module and the power supply module, and a second end of the Schottky diode is connected to the pull-up unit and the second control unit.

[0015] According to another aspect of the present application, a communication system is provided, comprising the communication circuit.

[0016] According to another aspect of the present application, a vehicle is provided, comprising the communication system.

[0017] The technical scheme of the embodiment of the present application provides a communication circuit, which comprises a transmitting module, a receiving module and a power supply module; the transmitting module is configured to output a trigger signal according to an external operation signal; the power supply module outputs a first power supply signal, the power supply module is connected to the transmitting module, and the power supply module is configured to supply power to the transmitting module, wherein the voltage value of the first power supply signal meets a first preset value, which can reduce the influence of the wiring harness voltage drop and improve the stability of communication. The receiving module comprises a low-voltage drop isolation unit, the low-power isolation unit is connected to the transmitting module and the power supply module, the low-voltage drop isolation unit is configured to isolate the first power supply signal, and the receiving module is configured to identify the trigger signal without the need of an external transceiver device. The communication circuit has a simple structure and low cost, and solves the problems of complex communication lines and high cost in the prior art.

[0018] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 is a structural schematic diagram of a communication circuit provided by the embodiment of the present application;

[0021] Figure 2 is a circuit diagram of a communication circuit provided by the embodiment of the present application;

[0022] Figure 3 is a waveform diagram of a transmitting signal and a receiving signal provided by the embodiment of the present application;

[0023] Figure 4 is a structural schematic diagram of a communication system provided by the embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of a vehicle provided by the embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0026] It should be noted that the terms "first", "second", and the like in the description, claims, and drawings of the present application are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] The embodiment of the present application provides a communication circuit, Figure 1It is a kind of communication circuit structure schematic diagram provided by the utility model embodiment, as shown in Figure 1 The communication circuit 100 includes a transmitting module 110, a receiving module 120 and a power supply module 130; the transmitting module 110 is used for outputting a trigger signal according to an external operation signal; the power supply module 130 outputs a first power supply signal, and the power supply module 130 is connected with the transmitting module 110; the power supply module 130 is used for supplying power for the transmitting module 110, wherein the voltage value of the first power supply signal meets a first preset value; the receiving module 120 includes a low-voltage drop isolation unit 121, and the low-power isolation unit 121 is connected with the transmitting module 110 and the power supply module 130; the low-voltage drop isolation unit 121 is used for isolating the first power supply signal, and the receiving module 120 is used for identifying the trigger signal.

[0028] In the embodiment, the communication circuit 100 refers to a path for transmitting information, including a sending end, a receiving end and required electronic devices and wiring harnesses; the transmitting module 110 is a module for outputting a signal to control the receiving module 120; the receiving module 120 refers to a module for receiving the signal output by the transmitting module 110 and performing corresponding operations; the power supply module 130 is a module for supplying power for the transmitting module, and the power supply module includes a power supply and other devices; the low-voltage drop isolation unit 121 is a unit for isolating the first power supply signal, and has the characteristics of low voltage drop.

[0029] For example, the transmitting module 110 triggers a signal according to an external operation instruction; when the trigger signal is a low-level signal, the receiving module 120 identifies the trigger signal according to the received low-level signal and performs corresponding operations; wherein the level signal output by the transmitting module 110 can be customized, that is, the transmission protocol of the transmitting module and the receiving module can be customized; in the transmission process, the low-voltage drop isolation unit has low voltage drop and can isolate the interference of the power supply module 130 to the receiving module 120; the first power supply signal is equal to the first preset value, for example, the first preset value can be 12V, which can reduce the influence of the wiring harness voltage drop and ensure the stability of communication.

[0030] The technical scheme of the embodiment provides a kind of communication circuit, and the communication circuit includes transmitting module, receiving module and power supply module;The transmitting module is used for outputting trigger signal according to external operation signal;Power supply module outputs first power supply signal, and power supply module connects transmitting module, and power supply module is used for supplying power for transmitting module, wherein the voltage value of first power supply signal meets first preset value, can reduce the influence of wiring harness voltage drop, improve the stability of communication.Receiving module includes low-voltage drop isolation unit, and low-power isolation unit is connected with transmitting module, power supply module, and low-voltage drop isolation unit is used for isolating first power supply signal, and receiving module is used for identifying trigger signal, without additional transceiver device, communication circuit structure is simple, reduce cost, solve the problem of complex communication line, higher cost in prior art.

[0031] Figure 2 is a circuit diagram of a communication circuit provided by the embodiment of the utility model, as shown in Figure 2 The transmitting module 110 includes a switch unit 210 and a first control unit 220, the control end of the switch unit 210 is connected with the first control unit 220, the first end of the switch unit 210 is connected with the power supply module 130 and the receiving module 120, the second end of the switch unit 210 is grounded, the first control unit 220 is used for controlling the switch unit 210 to be turned on or turned off according to an external operation instruction, and the switch unit 210 is used for outputting a trigger signal when being turned on.

[0032] In the embodiment, the switch unit 210 is a unit including a switching element, the first control unit 220 includes a microcontroller, when an external operation instruction is input, the first control unit 220 outputs a high-level signal, the first switch unit 210 is turned on according to the received high-level signal and outputs a trigger signal, at this time, the trigger signal is a low-level signal, the communication wire harness between the transmitting module 110 and the receiving module 120 is turned on, and the receiving module 120 identifies the trigger signal.

[0033] Specifically, the switch unit 210 includes a first transistor Q1, the first end of the first transistor Q1 is connected with the first end of the switch unit 210, the second end of the first transistor Q1 is connected with the second end of the switch unit 210, and the control end of the first transistor Q1 is connected with the control end of the switch unit 210.

[0034] On the basis of the above embodiment, when an external operation instruction is input, the first control unit 220 outputs a high-level signal, the first transistor Q1 is turned on according to the received high-level signal and outputs a low-level signal, and the receiving module 120 identifies the trigger signal. The first transistor Q1 can be a MOS tube, by selecting the model of the MOS tube, the switching time of the MOS tube can be less than 0.05 ms, and the rate meets 0-20Khz. Figure 3 is a waveform diagram of a transmitting signal and a receiving signal provided by the embodiment of the utility model, as shown in Figure 3 The waveform of the receiving signal is synchronized with the transmitting signal, the communication circuit has short delay and fast response, and can realize synchronous transmission.

[0035] Continuing to refer to Figure 2 The power supply module 130 includes a current limiting unit and a first power supply end V1, the first end of the current limiting unit is connected with the first power supply end V1, the second end of the current limiting unit is connected with the transmitting module 110, the first power supply end V1 is used for outputting a first power supply signal meeting a first preset value, and the current limiting unit is used for limiting the signal output by the first power supply end V1. The first preset value can be 12V, since the power supply voltage of a chip is generally 3.3V or 5V, the voltage of the first power supply end V1 is much greater than the power supply voltage of the chip, therefore, the influence of wire harness voltage drop can be reduced, and the stability of communication can be improved.

[0036] Specifically, the current limiting unit includes a first resistor R1, a first end of the first resistor R1 is connected to the first end of the current limiting unit, and a second end of the first resistor R1 is connected to the second end of the current limiting unit. The first resistor R1 serves as a pull-up resistor and has a clamping effect, and when the first transistor Q1 is not turned on, the level of the output end of the transmitting module 110 is clamped to a high level, and the communication line bundle between the transmitting module 110 and the receiving module 120 is not turned on.

[0037] With reference to the foregoing Figure 2 , the receiving module 120 further includes a pull-up unit 230 and a second control unit 240, the pull-up unit 230 is connected to the second control unit 240 and the low-voltage drop isolation unit 121, and the pull-up unit 230 is used for clamping a receiving end signal of the second control unit 240. The second control unit 240 is used for identifying a trigger signal according to the signal of the receiving end.

[0038] In the embodiment, the pull-up unit 230 is a unit for clamping the receiving end of the second control unit 240, so that the potential of the receiving end of the second control unit 240 remains stable, that is, the receiving end of the second control unit 240 is pulled up to a high level when no trigger signal is received. The second control unit 240 includes a microprocessor, and on the basis of the foregoing embodiment, when the transmitting module 110 outputs a low-level signal, the second control unit 240 identifies the trigger signal according to the received low-level signal.

[0039] On the basis of the foregoing embodiment, the low-voltage drop isolation unit 121 includes a Schottky diode D1, a first end of the Schottky diode D1 is connected to the transmitting module 110 and the power supply module 130, and a second end of the Schottky diode D1 is connected to the pull-up unit 230 and the second control unit 240.

[0040] In the embodiment, the low-voltage drop isolation unit 121 in the receiving module 120 adopts the Schottky diode D1, which can isolate the first power supply signal output by the power supply module 130, and the voltage drop of the Schottky diode D1 is small, so that the second control unit 240 can more accurately detect the low-level signal when the transmitting module 110 outputs a low-level signal.

[0041] Specifically, the pull-up unit 230 includes a second resistor R2 and a second power supply end V2, a first end of the second resistor R2 is connected to the second power supply end V2, and a second end of the second resistor R2 is connected to a receiving end of the second control unit 240. Wherein, the voltage of the second power supply end V2 can be 3.3V or 5V, the second resistor R2 serves as a pull-up resistor, and when the second control unit 240 does not receive a trigger signal, the receiving end of the second control unit 240 is pulled up to a high level (i.e. 3.3V or 5V), and when the transmitting module 110 outputs a low level signal, the receiving end of the second control unit 240 identifies the trigger signal according to the received low level signal.

[0042] The utility model embodiment further provides a kind of communication system, Figure 4 It is the structure diagram of the communication system provided in the utility model embodiment, as shown in Figure 4 The utility model provides communication system 10 including the communication circuit 100 provided in any embodiment described above. Communication system 10 refers to the whole set of system that each component in vehicle carries out information interaction, and the communication circuit 100 in any embodiment described above is applied in communication system 10, which simplifies the complexity of communication circuit, and the circuit structure is simple, saves cost, and can improve the stability of signal transmission of communication system 10 simultaneously.

[0043] The utility model embodiment further provides a kind of vehicle, Figure 5 It is the structure diagram of the vehicle provided in the utility model embodiment, as shown in Figure 5 The vehicle 20 provided in the utility model includes the communication system 10 provided in the above embodiment, and the communication system 10 is applied in vehicle 20, which reduces cost while providing the safety of vehicle.

[0044] It should be understood that various forms of processes shown above can be used to reorder, add or delete steps. For example, each step described in the utility model can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the utility model can be achieved, which is not limited herein.

[0045] The above specific embodiment does not constitute a limitation on the protection scope of the utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A communication circuit, characterized by, The communication circuit comprises a transmitting module, a receiving module and a power supply module. The transmitting module is configured to output a trigger signal according to an external operation signal. The power supply module outputs a first power signal, is connected to the transmitting module, and is configured to supply power to the transmitting module, wherein a voltage value of the first power signal meets a first preset value. The receiving module comprises a low-voltage drop isolation unit, which is connected to the transmitting module and the power supply module, and is configured to isolate the first power signal, and the receiving module is configured to identify the trigger signal.

2. The communication circuit of claim 1, wherein The transmitting module comprises a switching unit and a first control unit, a control end of the switching unit is connected to the first control unit, a first end of the switching unit is connected to the power supply module and the receiving module, a second end of the switching unit is grounded, and the first control unit is configured to control the switching unit to be turned on or turned off according to the external operation signal, and the switching unit is configured to output the trigger signal when turned on.

3. The communication circuit of claim 2, wherein, The switching unit comprises a first transistor, a first end of the first transistor is connected to the first end of the switching unit, a second end of the first transistor is connected to the second end of the switching unit, and a control end of the first transistor is connected to the control end of the switching unit.

4. The communication circuit of claim 1, wherein The power supply module comprises a current limiting unit and a first power supply end, a first end of the current limiting unit is connected to the first power supply end, a second end of the current limiting unit is connected to the transmitting module, the first power supply end is configured to output the first power signal meeting the first preset value, and the current limiting unit is configured to limit the current of the signal output by the first power supply end.

5. The communication circuit of claim 4, wherein, The current limiting unit comprises a first resistor, a first end of the first resistor is connected to the first end of the current limiting unit, and a second end of the first resistor is connected to the second end of the current limiting unit.

6. The communication circuit of claim 1, wherein, The receiving module further comprises a pull-up unit and a second control unit, the pull-up unit is connected to the second control unit and the low-voltage drop isolation unit, the pull-up unit is configured to clamp a signal at a receiving end of the second control unit, and the second control unit is configured to identify the trigger signal according to the signal at the receiving end.

7. The communication circuit of claim 6, wherein, The low-voltage drop isolation unit comprises a Schottky diode, a first end of the Schottky diode is connected to the transmitting module and the power supply module, and a second end of the Schottky diode is connected to the pull-up unit and the second control unit.

8. The communication circuit of claim 6, wherein, The pull-up unit comprises a second resistor and a second power supply end, a first end of the second resistor is connected to the second power supply end, and a second end of the second resistor is connected to the receiving end of the second control unit.

9. A communication system, characterized by The communication circuit comprises any one of claims 1-8.

10. A vehicle characterized by comprising: The communication system comprises claim 9.

Images