Vehicle communication system and method and electronic equipment

Abstract

The invention relates to the technical field of vehicle communication, and discloses a vehicle communication system and method and electronic device.The vehicle communication system comprises a first control module, a second control module, a first modulation-demodulation unit and a second modulation-demodulation unit, the first control module is connected with the first modulation-demodulation unit and used for generating first communication data, and the second control module is connected with the second modulation-demodulation unit and used for generating second communication data; the first modulation and demodulation unit is connected with the second modulation and demodulation unit through a power line and is used for modulating the first communication data to a high-frequency carrier signal of the power line to obtain a first electric signal and sending the first electric signal to the second modulation and demodulation unit based on the power line; the second modulation-demodulation unit is connected with the second control module and is used for receiving the first electric signal, demodulating first communication data from the first electric signal and sending the first communication data to the second control module; through the method, the number of wire harnesses is reduced, the wire harness length of the whole vehicle is shortened, and the cost of the whole vehicle is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle communication technologies, and particularly to a vehicle communication system, method, and electronic device. Background Art

[0002] In related vehicle models design, the wiring harness, as the neural network connecting various vehicle electronic control units (ECUs) and components such as sensors, can reach up to 5000 meters in length in high-end models, while the wiring harness length of common household vehicle models is about 3000 meters. With the rise of intelligent electric vehicle models, the domain control architecture has gradually been adopted. This architecture reduces the demand for some wiring harnesses through highly integrated control domains. Even so, the wiring harness length of intelligent electric vehicle models still remains at about 2000 meters.

[0003] The length of the wiring harness not only directly affects the manufacturing cost and body weight of the entire vehicle, but also has a certain impact on the handling performance and energy consumption level of the entire vehicle. A longer wiring harness means higher material costs and more complex installation configurations, and at the same time increases the weight of the vehicle, thereby affecting the energy consumption performance. In addition, the complex wiring harness layout may also increase the fault points, affecting the reliability and safety of the vehicle. Obviously, there is an urgent need for a new vehicle communication system to solve at least one of the above problems.

[0004] It should be noted that the above content only provides background technical information related to this application and does not necessarily constitute prior art. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, this application provides a vehicle communication system, method, and electronic device to reduce the number of wiring harnesses, shorten the length of the entire vehicle's wiring harness, and thereby reduce the cost of the entire vehicle.

[0006] Other features and advantages of this application will become apparent through the following detailed description, or be learned in part through the practice of this application.

[0007] According to one aspect of the embodiments of this application, a vehicle communication system is provided, including a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit; the first control module is connected to the first modulation and demodulation unit, and is used to generate first communication data and send the first communication data to the first modulation and demodulation unit; the first modulation and demodulation unit is connected to the second modulation and demodulation unit through a power line, and is used to modulate the first communication data onto the high-frequency carrier signal of the power line to obtain a first electrical signal, and send the first electrical signal to the second modulation and demodulation unit based on the power line; the second modulation and demodulation unit is connected to the second control module, and is used to receive the first electrical signal, demodulate the first communication data from the first electrical signal, and send it to the second control module.

[0008] In one embodiment of the present application, based on the foregoing solution, the second control module is further configured to generate second communication data and send the second communication data to the second modulation and demodulation unit; the second modulation and demodulation unit is further configured to modulate the second communication data onto a high-frequency carrier signal of the power line to obtain a second electrical signal, and send the second electrical signal to the first modulation and demodulation unit based on the power line; the first modulation and demodulation unit is further configured to receive the second electrical signal, demodulate the second communication data from the second electrical signal, and send it to the first control module.

[0009] In one embodiment of the present application, based on the foregoing solution, the first modulation and demodulation unit includes a first adder circuit and a first voltage follower circuit; the first adder circuit is configured to add the first communication data and the high-frequency carrier signal to obtain a first biased electrical signal with a bias voltage; the first voltage follower circuit is configured to output the first biased electrical signal as the first electrical signal.

[0010] In one embodiment of the present application, based on the foregoing solution, the first modulation and demodulation unit further includes a first zener diode and a first subtractor; the first zener diode is configured to separate the high-frequency carrier signal and the first communication data from the first electrical signal; the first subtractor is configured to remove the separated high-frequency carrier signal to obtain the first communication data.

[0011] In one embodiment of the present application, based on the foregoing solution, the second modulation and demodulation unit includes a second adder circuit and a second voltage follower circuit; the second adder circuit is configured to add the second communication data and the high-frequency carrier signal to obtain a second biased electrical signal with a bias voltage; the second voltage follower circuit is configured to output the second biased electrical signal as the second electrical signal.

[0012] In one embodiment of the present application, based on the foregoing solution, the second modulation and demodulation unit further includes a second zener diode and a second subtractor; the second zener diode is configured to separate the high-frequency carrier signal and the second communication data from the second electrical signal; the second subtractor is configured to remove the separated high-frequency carrier signal to obtain the second communication data.

[0013] In one embodiment of the present application, based on the foregoing solution, the first communication data includes CAN data and / or LIN data, and the second communication data includes CAN data and / or LIN data.

[0014] According to one aspect of the embodiments of the present application, a vehicle communication method is provided, which is applied to the vehicle communication system described in the foregoing solution. The vehicle communication system includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit. The method includes: in response to the first modulation and demodulation unit receiving first communication data sent by the first control module, modulating the first communication data onto a high-frequency carrier signal of the power line to obtain a first electrical signal, and sending the first electrical signal to the second modulation and demodulation unit based on the power line, wherein the first communication data is generated by the first control module; in response to the second modulation and demodulation unit receiving the first electrical signal, demodulating the first communication data from the first electrical signal and sending it to the second control module.

[0015] In an embodiment of the present application, based on the foregoing solution, the method further includes: in response to the second modulation and demodulation unit receiving second communication data sent by the second control module, modulating the second communication data onto a high-frequency carrier signal of the power line to obtain a second electrical signal, and sending the second electrical signal to the first modulation and demodulation unit based on the power line, wherein the second communication data is generated by the second control module; in response to the first modulation and demodulation unit receiving the second electrical signal, demodulating the second communication data from the second electrical signal and sending it to the first control module.

[0016] According to one aspect of the embodiments of the present application, an electronic device is provided. The electronic device includes: one or more processors; a storage device for storing one or more programs, which when executed by the one or more processors, cause the electronic device to implement the vehicle communication method described in any one of the above embodiments.

[0017] Advantages of the present application: The vehicle communication system of the present application includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit. The first control module is connected to the first modulation and demodulation unit and is used to generate first communication data and send the first communication data to the first modulation and demodulation unit. The first modulation and demodulation unit is connected to the second modulation and demodulation unit through the power line and is used to modulate the first communication data onto a high-frequency carrier signal of the power line to obtain a first electrical signal, and send the first electrical signal to the second modulation and demodulation unit based on the power line. The second modulation and demodulation unit is connected to the second control module and is used to receive the first electrical signal, demodulate the first communication data from the first electrical signal, and send it to the second control module. By the above method, the number of wire harnesses is reduced, especially the number of CAN and LIN communication wire harnesses, the length of the vehicle wire harness is shortened, the vehicle body weight is reduced, the handling performance is improved, and the vehicle energy consumption is reduced, thereby reducing the overall vehicle cost.

[0018] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and should not limit this application. Brief Description of the Drawings

[0019] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a block diagram of a vehicle communication system shown in an exemplary embodiment of this application;

[0021] Figure 2 is a schematic diagram of a modulation circuit of a vehicle communication system shown in an exemplary embodiment of this application;

[0022] Figure 3 is a schematic diagram of a demodulation circuit of a vehicle communication system shown in an exemplary embodiment of this application;

[0023] Figure 4 is a CAN communication schematic diagram of a vehicle communication system shown in an exemplary embodiment of this application;

[0024] Figure 5 is a LIN communication schematic diagram of a vehicle communication system shown in an exemplary embodiment of this application;

[0025] Figure 6 shows a schematic diagram of the structure of a computer system of an electronic device suitable for implementing the embodiments of this application. Detailed Embodiments

[0026] The following will describe the embodiments of this application with reference to the drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for explaining this application, rather than for limiting the protection scope of this application.

[0027] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of this application in a schematic manner. Therefore, only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0028] In the following description, numerous specific details are explored to provide a more thorough explanation of the embodiments of the present application. However, it will be apparent to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present application.

[0029] First of all, it should be noted that in the current vehicle communication system, the data exchange between ECUs (Electronic Control Units) mainly relies on CAN (Controller Area Network) communication and LIN (Local Interconnect Network) communication. Among them, CAN communication requires at least four cables, including a power supply line (VCC), a ground line (GND), a high-level data line (CAN_H), and a low-level data line (CAN_L); while LIN communication requires at least three cables, including a power supply line (also called a constant hot wire, VCC), a ground line (GND), and a data line (LIN). The laying and connection of these cables occupy a large part of the vehicle wiring harness and also constitute an important part of the vehicle communication cost.

[0030] Figure 1 It is a block diagram of a vehicle communication system shown in an exemplary embodiment of the present application. The device can be applied to a vehicle and is specifically configured in an in-vehicle host. The device can also be applicable to other exemplary implementation environments and is specifically configured in other devices. The present embodiment does not limit the implementation environment applicable to the device.

[0031] As Figure 1 shown, the exemplary vehicle communication system includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit. Among them, the first control module is connected to the first modulation and demodulation unit and is used to generate first communication data and send the first communication data to the first modulation and demodulation unit, where the first communication data is the data sent to the second control module; the first modulation and demodulation unit is connected to the second modulation and demodulation unit through a power line and is used to modulate the first communication data onto the high-frequency carrier signal of the power line to obtain a first electrical signal and send the first electrical signal to the second modulation and demodulation unit based on the power line; the second modulation and demodulation unit is connected to the second control module and is used to receive the first electrical signal, demodulate the first communication data from the first electrical signal, and send it to the second control module.

[0032] In one embodiment of the present application, the second control module is further configured to generate second communication data and send the second communication data to the second modulation and demodulation unit, where the second communication data is the data sent to the first control module; the second modulation and demodulation unit is further configured to modulate the second communication data onto the high-frequency carrier signal of the power line to obtain a second electrical signal, and send the second electrical signal to the first modulation and demodulation unit based on the power line; the first modulation and demodulation unit is further configured to receive the second electrical signal, demodulate the second communication data from the second electrical signal, and send it to the first control module.

[0033] It should be understood that the first control module and the second control module in the vehicle may be an ECU, a domain controller, or other controllers, and the embodiments of the present application do not limit this. The embodiments of the present application will be explained by taking the first control module and the second control module as ECUs as an example. It can be understood that there are multiple ECUs in the vehicle, each ECU is configured with a corresponding modulation and demodulation unit, and the communication methods between ECUs in the vehicle include but are not limited to CAN communication and / or LIN communication. In addition, the modulation and demodulation unit may be located inside the ECU or may be a device independent of the ECU, and this device is close to the ECU.

[0034] In one embodiment of the present application, the first communication data includes CAN data and / or LIN data, and the second communication data includes CAN data and / or LIN data. CAN data is the CAN signal, and LIN data is the LIN signal.

[0035] In one embodiment of the present application, a modulation and demodulation unit is added to the control module for CAN communication and / or LIN communication to implement the modulation and demodulation of the CAN_H signal, CAN_L signal, and LIN signal. It can be understood that the CAN signal includes the CAN_H signal and the CAN_L signal. Among them, the modulation and demodulation unit includes a modulation circuit and a demodulation circuit for signals.

[0036] It can be understood that, assuming the first control module needs to send the first communication data to the second control module, the first communication data needs to be modulated by the first modulation and demodulation unit to obtain a first electrical signal obtained by adding the first communication data and the high-frequency carrier signal of the power line. The first electrical signal is demodulated by the second modulation and demodulation unit to obtain the first communication data, and on the basis of reducing the wire harness, the first communication data is sent to the second control module. Similarly, if the second control module needs to send the second communication data to the first control module, the second communication data needs to be modulated by the second modulation and demodulation unit to obtain a second electrical signal obtained by adding the second communication data and the high-frequency carrier signal of the power line. The second electrical signal is demodulated by the first modulation and demodulation unit to obtain the second communication data. The above power line is the power line connecting the first modulation and demodulation unit and the second modulation and demodulation unit. It can be understood that the modulation and demodulation unit can modulate the data sent by the sending end and demodulate the data to be received by the receiving end, so as to achieve the purpose of reducing the number of wire harnesses and shortening the length of the vehicle wire harness.

[0037] In an embodiment of the present application, the first modulation and demodulation unit includes a first addition circuit and a first voltage follower circuit; the first addition circuit is used to add the first communication data and the high-frequency carrier signal to obtain a first biased electrical signal with a bias voltage; the first voltage follower circuit is used to output the first biased electrical signal as the first electrical signal.

[0038] In this embodiment, the modulation and demodulation unit includes a modulation circuit, and the modulation circuit includes an addition circuit and a voltage follower circuit. Among them, when the modulation and demodulation unit is the first modulation and demodulation unit, the first modulation and demodulation unit includes a first modulation circuit, and the first modulation circuit includes a first addition circuit and a first voltage follower circuit. The addition circuit and the voltage follower circuit can be built using an operational amplifier IC (Operational Amplifier Integrated Circuit). The addition circuit is built by an operational amplifier IC and resistors, and can add the first communication data CAN_H, CAN_L, and LIN signals to the VCC signal (the supply voltage on the power line) respectively. It can also be understood as adding the first communication data and the high-frequency carrier signal to obtain the V_H’, V_L’, and V_LIN’ signals with a bias voltage, that is, the first biased electrical signal; the voltage follower circuit is built by an operational amplifier IC and resistors. This circuit is a special in-phase amplifier circuit with a magnification of 1, with an infinite input impedance and an infinitesimal output impedance, so that the output signal has a strong load-carrying capacity. The V_H’, V_L’, and V_LIN’ signals pass through the voltage follower circuit respectively to obtain the V_H, V_L, and V_LIN signals with a large load-carrying capacity, that is, the first electrical signal. For the built addition circuit and voltage follower circuit, see Figure 2 , Figure 2It is a schematic diagram of the modulation circuit of the vehicle communication system shown in an exemplary embodiment of the present application. Referring to Figure 2 as shown, CAN_H, CAN_L, and LIN signals are respectively connected to the input Sig of a modulation circuit, and after modulation, output signals V_H, V_L, and V_LIN are obtained respectively. Continuing to refer to Figure 2 , V_S’ = VCC + Sig, V_S = V_S’, where Sig can be CAN_H, CAN_L, or LIN signal, the first bias electrical signal V_S’ can be V_H’, V_L’, or V_LIN’ signal, and the first electrical signal V_S can be V_H, V_L, or V_LIN signal.

[0039] In an embodiment of the present application, the first modulation and demodulation unit further includes a first voltage stabilizing diode and a first subtractor; the first voltage stabilizing diode is used to separate a high-frequency carrier signal and first communication data from the first electrical signal; the first subtractor is used to remove the separated high-frequency carrier signal to obtain the first communication data.

[0040] In this embodiment, the modulation and demodulation unit includes a demodulation circuit, and the demodulation circuit includes a voltage stabilizing diode and a subtractor. Among them, when the modulation and demodulation unit is the first modulation and demodulation unit, the first modulation and demodulation unit includes a first demodulation circuit, and the first demodulation circuit includes a first voltage stabilizing diode and a first subtractor. Among them, an operational amplifier IC and a voltage stabilizing diode can be used to build a subtractor. The voltage stabilizing diode can separate a stable VCC signal, that is, a high-frequency carrier signal, from the V_H, V_L, or V_LIN signal, and then the received V_H, V_L, V_LIN signals are passed through the subtractor to remove the VCC signal, so as to be restored to the CAN_H, CAN_L, LIN signals, that is, the first communication data. The built subtraction circuit is shown in detail in Figure 3 , Figure 3 It is a schematic diagram of the demodulation circuit of the vehicle communication system shown in an exemplary embodiment of the present application. Referring to Figure 3 as shown, V_H, V_L, and V_LIN signals are respectively connected to the input V_S of a demodulation circuit, and after demodulation, CAN_H, CAN_L, and LIN signals are respectively restored.

[0041] In this embodiment, referring to Figure 4 , Figure 4 It is a schematic diagram of CAN communication of the vehicle communication system shown in an exemplary embodiment of the present application. Taking the first communication data as CAN signal data as an example, if Figure 4 the ECU1 in is used as the first control module, and Figure 4 the modem close to ECU1 in is used as the first modulation and demodulation unit, and Figure 4 the ECU2 and / or ECU3 in are used as the second control module, and Figure 4The modem near ECU2 and / or the modem of ECU3 in can serve as the second modulation and demodulation unit. It can be understood that the second control module and its corresponding second modulation and demodulation unit can be one or more, and the present application does not limit this. From the foregoing, each ECU is configured with a corresponding modulation and demodulation unit, that is, if Figure 4 ECU2 in is used as the second control module, then Figure 4 the modem near ECU2 in is used as the second modulation and demodulation unit; if Figure 4 ECU3 in is used as the second control module, then Figure 4 the modem near ECU3 in is used as the second modulation and demodulation unit; if Figure 4 ECU2 and ECU3 in are used as the second control module, then Figure 4 the modems near ECU2 and ECU3 in are used as the second modulation and demodulation unit.

[0042] If the CAN_L signal is modulated onto the VCC cable, then the V_L signal is obtained, the V_L signal is transmitted through the VCC cable, and the CAN_H signal is transmitted through the CAN_H cable. That is, only three cables, namely the GND cable, the VCC cable, and the CAN_H cable, are required to transmit the first communication data from the first modulation and demodulation unit to the second modulation and demodulation unit.

[0043] If the CAN_H signal is modulated onto the VCC cable, then the V_H signal is obtained, the V_H signal is transmitted through the VCC cable, and the CAN_L signal is transmitted through the CAN_L cable. That is, only three cables, namely the GND cable, the VCC cable, and the CAN_L cable, are required to transmit the first communication data from the first modulation and demodulation unit to the second modulation and demodulation unit.

[0044] If the CAN_H signal is modulated onto the first VCC cable, then the V_H signal is obtained; if the CAN_L signal is modulated onto the second VCC cable, then the V_L signal is obtained; the V_H signal is transmitted through the first VCC cable, and the V_L signal is transmitted through the second VCC cable. That is, only three cables in total, namely the GND cable, the first VCC cable, and the second VCC cable, are required to transmit the first communication data from the first modulation and demodulation unit to the second modulation and demodulation unit; among them, the first VCC cable for transmitting the V_L signal and the second VCC cable for transmitting the V_H signal can be two different VCC cables, or can be two output paths divided from the same VCC cable through devices such as a splitter. The present application does not limit this and should not bring any limitation to the functions and usage scope of the embodiments of the present application.

[0045] In this embodiment, referring to Figure 5 , Figure 5It is a schematic diagram of LIN communication of a vehicle communication system shown in an exemplary embodiment of the present application. Taking the first communication data as LIN signal data as an example, if Figure 5 the ECU5 in Figure 5 is used as the first control module, and the modem near ECU5 in Figure 5 is used as the first modulation and demodulation unit, and the ECU4 and / or ECU6 in Figure 5 is used as the second control module, and the modem near ECU4 and / or the modem of ECU6 in Figure 5 is used as the second modulation and demodulation unit, it can be understood that the second control module and its corresponding second modulation and demodulation unit can be one or more, and the present application does not limit this. From the foregoing, it can be seen that each ECU is configured with a corresponding modulation and demodulation unit, that is, if Figure 5 the ECU4 in Figure 5 is used as the second control module, then the modem near ECU4 in Figure 5 is used as the second modulation and demodulation unit; if Figure 5 the ECU6 in Figure 5 is used as the second control module, then the modem near ECU6 in Figure 5 is used as the second modulation and demodulation unit; if Figure 5 the ECU4 and ECU6 in Figure 5 are used as the second control module, and the modem near ECU4 and the modem of ECU6 in Figure 5 are used as the second modulation and demodulation unit.

[0046] If the LIN signal is modulated onto the VCC cable, the V_LIN signal is obtained, and the V_LIN signal is transmitted through the VCC cable, that is, only two cables, the GND cable and the VCC cable, are required to transmit the first communication data from the first modulation and demodulation unit to the second modulation and demodulation unit.

[0047] In an embodiment of the present application, the second modulation and demodulation unit includes a second adder circuit and a second voltage follower circuit; the second adder circuit is used to add the second communication data and the high-frequency carrier signal to obtain a second biased electrical signal with a bias voltage; the second voltage follower circuit is used to output the second biased electrical signal as a second electrical signal.

[0048] In an embodiment of the present application, the second modulation and demodulation unit further includes a second zener diode and a second subtractor; the second zener diode is used to separate the high-frequency carrier signal and the second communication data from the second electrical signal; the second subtractor is used to remove the separated high-frequency carrier signal to obtain the second communication data.

[0049] It can be understood that the second addition circuit and the second voltage follower circuit in the second modulation and demodulation unit have the same working principle as the first addition circuit and the first voltage follower circuit in the first modulation and demodulation unit, and the second voltage stabilizing diode and the second subtractor in the second modulation and demodulation unit have the same working principle as the first voltage stabilizing diode and the first subtractor in the first modulation and demodulation unit. It's just that different communication data are sent by different control modules, which can also be understood as different data transmission directions. For specific descriptions, refer to the corresponding descriptions above and will not be elaborated here.

[0050] In an embodiment of the present application, when sending a signal, through the modulation circuit, the CAN_H, CAN_L or LIN signal is modulated onto VCC to obtain the V_H, V_L or V_LIN signal, realizing the transmission of CAN_H, CAN_L, LIN signals on the VCC cable. It can be understood that the modulated CAN_H and CAN_L signals, namely the V_H and V_L signals, are also a kind of differential signals, so they also have high anti-interference ability to ensure data transmission. When receiving a signal, through the demodulation circuit, the CAN_H, CAN_L, LIN signals are demodulated from V_H, V_L, V_LIN, realizing the reception of CAN_H, CAN_L, LIN signals on the VCC cable.

[0051] In the present application, by modulating the CAN_H and / or CAN_L signal onto VCC respectively at the sending end to obtain the new differential signals V_H and / or V_L, and demodulating V_H and / or V_L at the receiving end to separate VCC, CAN_H, CAN_L, it is realized to reduce one wire harness, so as to achieve the purpose of reducing the number of wire harnesses and shortening the length of the vehicle's entire wire harness; or by modulating the LIN signal onto VCC at the sending end to obtain the V_LIN signal, and separating VCC and LIN signals from V_LIN through demodulation at the receiving end, it is realized to reduce one LIN wire harness, so as to achieve the purpose of reducing the number of wire harnesses and shortening the length of the vehicle's entire wire harness.

[0052] The operational amplifier IC and voltage stabilizing diode required for the modulation circuit and demodulation circuit in the present application have relatively low costs. Compared with wire harnesses, they have greater cost advantages. By reducing the use of wire harnesses, the purpose of reducing the cost of the entire vehicle is achieved. By shortening the length of the vehicle's entire wire harness, the weight of the vehicle is also reduced, improving the vehicle's handling performance and reducing the vehicle's energy consumption.

[0053] The present application also provides a vehicle communication method, which can be applied to the vehicle communication system in the foregoing embodiment. The vehicle communication system includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit. This vehicle communication method at least includes steps S1 to step S2, which are introduced in detail as follows:

[0054] In step S1, in response to the first modulation and demodulation unit receiving the first communication data sent by the first control module, the first communication data is modulated onto the high-frequency carrier signal of the power line to obtain a first electrical signal, and the first electrical signal is sent to the second modulation and demodulation unit based on the power line. Among them, the first communication data is generated by the first control module, and the first communication data is data sent to the second control module.

[0055] In step S2, in response to the second modulation and demodulation unit receiving the first electrical signal, the first communication data is demodulated from the first electrical signal and sent to the second control module.

[0056] In an embodiment of the present application, the vehicle communication method further includes the following steps: in response to the second modulation and demodulation unit receiving the second communication data sent by the second control module, the second communication data is modulated onto the high-frequency carrier signal of the power line to obtain a second electrical signal, and the second electrical signal is sent to the first modulation and demodulation unit based on the power line. Among them, the second communication data is generated by the second control module, and the second communication data is data sent to the first control module; in response to the first modulation and demodulation unit receiving the second electrical signal, the second communication data is demodulated from the second electrical signal and sent to the first control module.

[0057] It should be noted that the vehicle communication method provided in the above embodiment and the vehicle communication system provided in the above embodiment belong to the same concept. The specific implementation manners of each step have been described in detail in the method embodiment, and will not be repeated here. In practical applications, the vehicle communication method provided in the above embodiment can allocate the above functions to different steps according to needs to complete all or part of the functions described above, and this is not limited here either.

[0058] This application modulates the CAN_H and / or CAN_L signals onto VCC and transmits the CAN_H and / or CAN_L signals through the VCC cable to reduce the CAN_H and / or CAN_L signal harness; or modulates the LIN signal onto VCC and transmits the LIN signal through the VCC cable to reduce the LIN signal harness. This application adds a modulation and demodulation unit to the ECUs at both ends of the harness for CAN and LIN communication to achieve the modulation and demodulation of CAN_H and / or CAN_L, and LIN signals. Specifically, during signal transmission, the CAN_H and / or CAN_L are modulated onto VCC through a modulation circuit to achieve the transmission of CAN_H and / or CAN_L on the VCC cable; or the LIN signal is modulated onto VCC to achieve the transmission of the LIN signal on the VCC cable. During signal reception, the CAN_H and / or CAN_L are demodulated from VCC through a demodulation circuit to achieve the reception of the CAN_H and / or CAN_L signals on the VCC cable; or the LIN signal is demodulated from VCC through a demodulation circuit to achieve the reception of the CAN_H or CAN_L, and LIN signals on the VCC cable.

[0059] In the CAN communication of the current vehicle ECU in this application, there are at least four harnesses: VCC, GND, CAN_H, and CAN_L; in the LIN communication, there are at least three harnesses: VCC, GND, and LIN. To reduce the number of harnesses and shorten the length of the vehicle's entire harness, this application modulates the CAN_H and CAN_L signals onto VCC at the sending end and demodulates the CAN_H and CAN_L signals on VCC at the receiving end to reduce one harness; or modulates the LIN signal onto VCC at the sending end and demodulates the LIN signal from VCC at the receiving end to reduce one LIN harness, so as to achieve the purpose of reducing the number of harnesses and shortening the length of the vehicle's entire harness.

[0060] An embodiment of this application also provides an electronic device, including: one or more processors; a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the vehicle communication methods provided in the above various embodiments.

[0061] Figure 6 The structural schematic diagram of a computer system of an electronic device suitable for implementing the embodiments of this application is shown. It should be noted that Figure 6 The computer system 600 of the electronic device shown is only an example and should not impose any limitations on the functions and usage scope of the embodiments of this application.

[0062] Such as Figure 6As shown, the computer system 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage part 608 into the random access memory (RAM) 603, such as executing the methods provided in the above-mentioned various embodiments. Various programs and data required for system operation are also stored in the RAM 603. The CPU 601, ROM 602 and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0063] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, and the like; an output section 607 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. Removable media 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read therefrom can be installed into the storage section 608 as needed.

[0064] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 609, and / or installed from a removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the various functions defined in the system of the present application are executed.

[0065] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted by any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0066] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Among them, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0067] The units involved in the embodiments described in this application can be implemented in software or in hardware, and the described units can also be provided in a processor. In some cases, the names of these units do not constitute a limitation on the units themselves.

[0068] On the other hand, this application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer is caused to execute the vehicle communication method provided in each of the above embodiments. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist alone without being assembled into the electronic device.

[0069] It should be noted that although several modules or units of a device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of the two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above may be further divided and embodied by multiple modules or units.

[0070] On the other hand, this application also provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the vehicle communication method provided in each of the above embodiments.

[0071] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described here can be implemented in software or in a manner of software combined with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (such as a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of this application.

[0072] After considering the specification and practicing the disclosed embodiments here, those skilled in the art will readily conceive of other embodiments of this application. This application is intended to cover any variations, uses, or adaptations of this application, which follow the general principles of this application and include known common knowledge or conventional technical means in the technical field not disclosed in this application.

[0073] The above embodiments are only illustrative of the principles and effects of the present application and are not intended to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those of ordinary skill in the art without departing from the spirit and technical idea disclosed by the present application should still be covered by the claims of the present application.

Claims

1. A vehicle communication system, characterized in that, It includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit; The first control module is connected to the first modulation and demodulation unit, and is used to generate first communication data and send the first communication data to the first modulation and demodulation unit; The first modulation and demodulation unit is connected to the second modulation and demodulation unit through a power line, and is used to modulate the first communication data onto a high-frequency carrier signal of the power line to obtain a first electrical signal, and send the first electrical signal to the second modulation and demodulation unit based on the power line; The second modulation and demodulation unit is connected to the second control module, and is used to receive the first electrical signal, demodulate the first communication data from the first electrical signal, and send it to the second control module.

2. The vehicle communication system according to claim 1, characterized in that, The second control module is further used to generate second communication data and send the second communication data to the second modulation and demodulation unit; The second modulation and demodulation unit is further used to modulate the second communication data onto a high-frequency carrier signal of the power line to obtain a second electrical signal, and send the second electrical signal to the first modulation and demodulation unit based on the power line; The first modulation and demodulation unit is further used to receive the second electrical signal, demodulate the second communication data from the second electrical signal, and send it to the first control module.

3. The vehicle communication system according to claim 2, wherein, The first modulation and demodulation unit includes a first adder circuit and a first voltage follower circuit; The first adder circuit is used to add the first communication data and the high-frequency carrier signal to obtain a first biased electrical signal with a bias voltage; The first voltage follower circuit is used to output the first biased electrical signal as the first electrical signal.

4. The vehicle communication system according to claim 2, wherein The first modulation and demodulation unit further includes a first zener diode and a first subtractor; The first zener diode is used to separate the high-frequency carrier signal and the first communication data from the first electrical signal; The first subtractor is used to remove the separated high-frequency carrier signal to obtain the first communication data.

5. The vehicle communication system according to claim 2, wherein The second modulation and demodulation unit includes a second adder circuit and a second voltage follower circuit; The second adder circuit is used to add the second communication data and the high-frequency carrier signal to obtain a second biased electrical signal with a bias voltage; The second voltage follower circuit is used to output the second biased electrical signal as the second electrical signal.

6. The vehicle communication system according to claim 2, wherein The second modulation and demodulation unit further includes a second zener diode and a second subtractor; The second zener diode is used to separate the high-frequency carrier signal and the second communication data from the second electrical signal; The second subtractor is used to remove the separated high-frequency carrier signal to obtain the second communication data.

7. The vehicle communication system according to any one of claims 1 to 6, characterized in that, The first communication data includes CAN data and / or LIN data, and the second communication data includes CAN data and / or LIN data.

8. A vehicle communication method, characterized in that, Applied to the vehicle communication system according to any one of claims 1 to 7, the vehicle communication system includes a first control module, a second control module, a first modulation and demodulation unit, and a second modulation and demodulation unit, and the method includes: In response to the first modulation and demodulation unit receiving the first communication data sent by the first control module, modulating the first communication data onto a high-frequency carrier signal of the power line to obtain a first electrical signal, and transmitting the first electrical signal to the second modulation and demodulation unit based on the power line, where the first communication data is generated by the first control module; In response to the second modulation and demodulation unit receiving the first electrical signal, demodulating the first communication data from the first electrical signal and sending it to the second control module.

9. The vehicle communication method according to claim 8, wherein The method further includes: In response to the second modulation and demodulation unit receiving the second communication data sent by the second control module, modulating the second communication data onto a high-frequency carrier signal of the power line to obtain a second electrical signal, and transmitting the second electrical signal to the first modulation and demodulation unit based on the power line, where the second communication data is generated by the second control module; In response to the first modulation and demodulation unit receiving the second electrical signal, demodulating the second communication data from the second electrical signal and sending it to the first control module.

10. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which when executed by the one or more processors, cause the electronic device to implement the vehicle communication method as claimed in claim 8 or 9.

Images