Communication conversion device and communication system

Abstract

The application discloses a communication conversion device and a communication system, and relates to the technical field of communication signal conversion. The application comprises a conversion substrate, a core substrate, an Ethernet communication module, a CAN bus communication module and a control module. The core substrate is electrically connected with the conversion substrate through a COMe connector. The Ethernet communication module is arranged on the conversion substrate and comprises at least two Ethernet communication interfaces. The CAN bus communication module is arranged on the conversion substrate and comprises at least two CAN bus communication interfaces. The control module is arranged on the core substrate, a first end of the control module is in communication connection with the Ethernet communication module through the COMe connector, and a second end of the control module is electrically connected with the CAN bus communication module through the COMe connector. The number of the Ethernet communication interfaces corresponds to the number of the CAN bus communication interfaces. The control module is configured to isolate the communication channels between the Ethernet communication interfaces in a first communication mode and to conduct the communication channels between the Ethernet communication interfaces in a second communication mode. The application aims to improve the reliability of the device when converting Ethernet communication and CAN communication.

Description

Technical Field

[0001] This invention relates to the field of communication signal conversion technology, and in particular to a communication conversion device and a communication system. Background Technology

[0002] In industrial equipment, upper-level management systems typically exchange data at high speed via Ethernet, while lower-level sensors, actuators, and controllers are connected via CAN buses, enabling the upper-level management system to monitor and control the lower-level devices. In practical applications, multiple lower-level devices are usually configured, meaning multiple CAN buses exist. If a single Ethernet communication interface is used to connect to the upper-level management system, a failure of that Ethernet interface could prevent the upper-level management system from effectively monitoring and controlling the lower-level devices. Summary of the Invention

[0003] The main objective of this invention is to provide a communication conversion device and a communication system, which aims to improve the reliability of the device when performing Ethernet communication and CAN communication conversion.

[0004] To achieve the above objectives, the present invention provides a communication conversion device, the communication conversion device comprising:

[0005] Conversion substrate;

[0006] The core substrate is electrically connected to the conversion substrate via a COME connector;

[0007] An Ethernet communication module is disposed on the conversion substrate and includes at least two Ethernet communication interfaces;

[0008] A CAN bus communication module is disposed on the conversion substrate and includes at least two CAN bus communication interfaces;

[0009] A control module is mounted on the core substrate. The first end of the control module is connected to the Ethernet communication module via the COME connector, and the second end of the control module is electrically connected to the CAN bus communication module via the COME connector.

[0010] The number of Ethernet communication interfaces corresponds to the number of CAN bus communication interfaces; the control module is configured to isolate the communication path between the Ethernet communication interfaces in the first communication mode, and to enable the communication path between the Ethernet communication interfaces in the second communication mode.

[0011] In one embodiment, the control module is specifically configured as follows:

[0012] If at least one of the multiple Ethernet communication interfaces experiences a communication failure, the communication mode will be switched to the second communication mode; or,

[0013] When all of the Ethernet communication interfaces are functioning normally, the communication mode is switched to the first communication mode.

[0014] In one embodiment, the communication conversion device further includes a trigger input module, the output of which is electrically connected to the control module. The trigger input module is used to output a corresponding trigger signal when triggered. The control module is specifically configured as follows:

[0015] When the trigger input module is triggered and outputs the first trigger signal, the control module executes the first communication mode;

[0016] When the trigger input module is triggered and outputs a second trigger signal, the control module executes the second communication mode.

[0017] In one embodiment, the Ethernet communication module further includes multiple network transformer circuits, the first terminals of the multiple network transformer circuits being electrically connected to the multiple Ethernet communication interfaces one by one, and the second terminals of the multiple network transformer circuits being electrically connected to the COME connector.

[0018] In one embodiment, the Ethernet communication module further includes multiple network protection circuits, the first terminals of which are electrically connected to the multiple Ethernet communication interfaces one by one, and the second terminals of which are electrically connected to the multiple network transformer circuits one by one; the network protection circuits are used to prevent external electrical abnormalities from damaging the communication conversion device.

[0019] In one embodiment, the control module further includes:

[0020] A network switching circuit, the first end of which is electrically connected to a plurality of network transformer circuits via the COME connector;

[0021] A control circuit, which is electrically connected to the second terminal of the network switching circuit.

[0022] In one embodiment, the CAN bus communication module further includes multiple CAN bus transceiver circuits, the first ends of the multiple CAN bus transceiver circuits being electrically connected to the CAN bus communication interface one-to-one, and the second ends of the multiple CAN bus transceiver circuits being communicatively connected to the control module.

[0023] In one embodiment, the CAN bus communication module further includes multiple CAN communication protection circuits. The first terminals of the multiple CAN communication protection circuits are electrically connected to the multiple CAN bus communication interfaces one by one, and the second terminals of the multiple CAN communication protection circuits are electrically connected to the multiple CAN bus transceiver circuits one by one. The CAN communication protection circuits are used to prevent external electrical abnormalities from damaging the communication conversion device.

[0024] In one embodiment, the communication conversion device further includes a power module, the input terminal of which is electrically connected to an external power input terminal, and the output terminal of which is electrically connected to the control module; the power module is used to convert the first voltage input to the external power input terminal into a second voltage and output it.

[0025] The present invention also proposes a communication system, the communication system comprising at least two host computers, at least two slave computers, and a communication conversion device as described in any of the preceding claims;

[0026] The host computer is electrically connected to the Ethernet communication interface; the slave computer is electrically connected to the CAN bus communication interface.

[0027] This invention employs a communication conversion device to effectively improve the reliability of equipment during Ethernet and CAN communication conversion. The communication conversion device includes a conversion base plate and a core base plate, both equipped with COME connectors for modular connection. Furthermore, the device includes an Ethernet communication module, a CAN bus communication module, and a control module. The Ethernet and CAN bus communication modules are located on the conversion base plate, while the control module is located on the core base plate. Each of the Ethernet and CAN bus communication modules includes at least two Ethernet communication interfaces and two CAN bus communication interfaces, with the number of Ethernet interfaces corresponding to the number of CAN bus communication interfaces. The control module is configured to isolate the communication paths between the Ethernet communication interfaces in a first communication mode and to enable communication between them in a second communication mode. In the first communication mode, the Ethernet and CAN bus communication interfaces communicate one-to-one without interference. In the second communication mode, the Ethernet communication interfaces are interconnected, but the Ethernet and CAN bus communication interfaces are not directly correlated, thus ensuring normal communication even if one Ethernet communication interface fails. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the communication conversion device of the present invention;

[0030] Figure 2 This is a schematic diagram of a structure of an embodiment of the communication conversion device of the present invention.

[0031] Explanation of icon numbers:

[0032] 10. Conversion substrate; 20. Core substrate; 30. Ethernet communication module; 31. Ethernet communication interface; 32. Network transformer circuit; 33. Network protection circuit; 40. CAN bus communication module; 41. CAN bus communication interface; 42. CAN bus transceiver circuit; 43. CAN communication protection circuit; 50. Control module; 51. Control circuit; 52. Network switching circuit.

[0033] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0037] In industrial equipment, upper-level management systems typically exchange data at high speed via Ethernet, while lower-level sensors, actuators, and controllers are connected via CAN buses, enabling the upper-level management system to monitor and control the lower-level devices. In practical applications, multiple lower-level devices are usually configured, meaning multiple CAN buses exist. If a single Ethernet communication interface is used to connect to the upper-level management system, a failure of that Ethernet interface could prevent the upper-level management system from effectively monitoring and controlling the lower-level devices.

[0038] To solve the above problems, refer to Figure 1 and Figure 2 The present invention proposes a communication conversion device, the communication conversion device comprising:

[0039] Conversion substrate 10;

[0040] The core substrate 20 is electrically connected to the conversion substrate 10 via a COME connector.

[0041] Ethernet communication module 30, which is disposed on the conversion substrate 10 and includes at least two Ethernet communication interfaces 31;

[0042] A CAN bus communication module 40 is disposed on the conversion substrate 10 and includes at least two CAN bus communication interfaces 41.

[0043] A control module 50 is disposed on the core substrate 20. The first end of the control module 50 is connected to the Ethernet communication module 30 via the COME connector, and the second end of the control module 50 is electrically connected to the CAN bus communication module 40 via the COME connector.

[0044] The number of Ethernet communication interfaces 31 corresponds to the number of CAN bus communication interfaces 41; the control module 50 is configured to isolate the communication path between the Ethernet communication interfaces 31 in the first communication mode and to open the communication path between the Ethernet communication interfaces 31 in the second communication mode.

[0045] In this embodiment, both the conversion substrate 10 and the core substrate 20 can be implemented using corresponding PCB boards. The core substrate 20 is electrically connected to the conversion substrate 10 via a COMe connector; that is, the male connector of the COMe connector is located on the core substrate 20, and the female connector is located on the conversion substrate 10. The connection between the conversion substrate 10 and the core substrate 20 is achieved by inserting the male and female connectors of the COMe connector. COMe connectors typically use high-density connectors with 220 or 440 pins to support high-speed signals and a large number of I / Os. It is understood that the COMe connector specification defines the connector's mechanical dimensions, pin arrangement, electrical characteristics, and signal distribution, ensuring compatibility between COMe connectors and carrier boards from different manufacturers. This allows users to independently upgrade computing modules or replace carrier boards according to actual needs without redesigning the entire system, thereby shortening the product development cycle and reducing development costs. In other words, by using a COME connector to connect the conversion substrate 10 and the core substrate 20, it is possible to replace either the conversion substrate 10 or the core substrate 20 when the usage requirements of the communication conversion device change, thereby ensuring that the adjusted communication conversion device meets the current usage requirements. Furthermore, using a COME connector also ensures stable and reliable signal transmission and connectivity.

[0046] In this embodiment, the Ethernet communication module 30 can be implemented using multiple Ethernet communication interfaces 31 and corresponding Ethernet signal processing circuits. It is understood that the Ethernet communication interface 31 is the physical and logical port used by a host computer, network device, or other intelligent device to connect to an Ethernet network. The host computer achieves data exchange and network communication between devices by connecting to the Ethernet communication interface 31. The Ethernet communication module 30 is mounted on the conversion substrate 10, and the Ethernet communication module 30 must include at least two Ethernet communication interfaces 31 to ensure that even if one Ethernet communication interface 31 is faulty, the host computer can still acquire and send communication signals through the other Ethernet communication interface 31. It should be noted that to ensure network communication speed and quality, all multiple Ethernet communication interfaces 31 must be implemented using Gigabit Ethernet communication interfaces 31.

[0047] Optionally, the Ethernet communication module 30 further includes a plurality of network transformer circuits 32, the first ends of the plurality of network transformer circuits 32 being electrically connected to the plurality of Ethernet communication interfaces 31 in a one-to-one correspondence, and the second ends of the plurality of network transformer circuits 32 being electrically connected to the COME connector.

[0048] In this embodiment, the Ethernet communication module 30 also includes a network transformer circuit 32 corresponding to the Ethernet communication interface 31. The first end of the network transformer circuit 32 is electrically connected to the Ethernet communication interface 31, and the second end is electrically connected to the COME connector, thereby achieving electrical isolation between the Ethernet communication interface 31 and the COME connector, as well as signal coupling and DC bias removal, noise suppression and common-mode filtering, and impedance matching. Specifically, network cables may be hundreds of meters long, exposed to complex electromagnetic environments, and external networks may experience ground loop currents due to different ground potentials, or encounter electrostatic discharge / lightning-induced voltages. The network transformer circuit 32 can transmit signals through magnetic coupling, but without direct electrical connection, thus preventing high voltage from entering the MCU or switch, ensuring personnel and equipment safety, and improving system reliability. Furthermore, Ethernet uses AC coupling to transmit high-speed differential signals, while the signal output by the PHY chip carries a DC component. The inductive characteristics of the network transformer circuit 32 naturally block DC, allowing only AC signals to pass through, achieving AC coupling. Furthermore, network cables are prone to introducing common-mode noise during long-distance transmission. Network transformer circuit 32 typically integrates a common-mode inductor structure, providing low impedance for differential signals, allowing them to pass smoothly, and high impedance for common-mode noise, significantly attenuating it and thus effectively improving communication stability. In addition, standard Ethernet cables have a characteristic impedance of 100Ω, and the network transformer is designed to match this impedance, preventing signal reflection at the interface. At gigabit speeds, signal frequencies reach over 125MHz; any impedance discontinuity will lead to signal distortion and increased bit error rate. Network transformer circuit 32 effectively ensures the integrity of high-speed signals.

[0049] Optionally, the Ethernet communication module 30 further includes a plurality of network protection circuits 33, the first ends of the plurality of network protection circuits 33 being electrically connected to the plurality of Ethernet communication interfaces 31 in a one-to-one correspondence, and the second ends of the plurality of network protection circuits 33 being electrically connected to the plurality of network transformer circuits 32 in a one-to-one correspondence; the network protection circuits 33 are used to prevent external electrical abnormalities from damaging the communication conversion device.

[0050] It is understandable that placing a network protection circuit 33 between the Ethernet communication interface 31 and the network transformer circuit 32 can effectively prevent external electrical anomalies from damaging the internal core chip. For example, when the network cable is plugged in or unplugged or exposed to a dry environment, static electricity can easily accumulate. The protection circuit can instantly discharge the static electricity to prevent damage to sensitive chips. Lightning strikes, power surges, or motor start-ups and stops may generate high-voltage pulses on the network cable. The protection circuit can absorb or limit the current to prevent equipment burnout. External wiring errors or power intrusion may cause voltage anomalies. The protection device can cut off or clamp the voltage. Specifically, the protection circuit is located between the Ethernet communication interface 31 and the network transformer circuit 32 and can be implemented using a TVS diode array, gas discharge tube, or varistor, etc. It should be noted that while the network transformer circuit 32 itself has electrical isolation capabilities, it cannot absorb transient high-voltage energy. It isolates DC and low-frequency interference and is insufficient for nanosecond-level ESD or microsecond-level surge response. Therefore, under high voltage, it may break down its internal insulation layer, leading to permanent damage. In other words, the network transformer circuit 32 is responsible for isolation, and the protection circuit is responsible for clamping and discharging, thereby ensuring the stable operation of the communication conversion device.

[0051] Optionally, the control module 50 further includes:

[0052] A network switching circuit 52, the first end of which is electrically connected to a plurality of network transformer circuits 32 via the COME connector;

[0053] Control circuit 51, which is electrically connected to the second terminal of network switching circuit 52.

[0054] Understandably, the network switching circuit 52 is a circuit composed of chips or modules that support high-speed Ethernet communication. It can connect multiple Ethernet devices and intelligently forward data frames between them. Specifically, it supports multi-port data switching and forwarding, allowing multiple Ethernet devices to access the network. When the Ethernet communication interface 31 receives a data packet, the switch will forward it to only the necessary Ethernet communication interfaces 31 or control circuit 51 via the COME connector, based on the destination MAC address, instead of broadcasting it to all interfaces, thus improving efficiency. The control circuit 51 can be implemented using FPGA (Field Programmable Gate Array), PLC (Programmable Logic Controller), MCU (Microcontroller Unit), DSP (Digital Signal Processor), SOC (System on Chip), etc.

[0055] In this embodiment, communication data enters through the Ethernet communication interface 31. Upon receiving a TCP / IP data packet, the network switching circuit 52 determines whether it needs to be sent to the control circuit 51. If so, it sends the packet to the control circuit 51 via the MII interface. The control circuit 51 parses the Ethernet data, encapsulates it into a CAN frame, and sends it to the CAN device via the CAN bus communication interface 41. Subsequently, the CAN device returns data to the control circuit 51, encapsulates it into an Ethernet frame, and sends it to the network switching circuit 52. The network switching circuit 52 selects one or more of the multiple Ethernet communication interfaces 31 to send the data based on the target IP / MAC address.

[0056] In this embodiment, the CAN bus communication module 40 can be implemented using multiple CAN bus communication interfaces 41 and corresponding CAN signal processing circuits. The CAN bus communication interfaces 41 are used to access the hardware and logic channels of the CAN bus, encapsulate internal device data into CAN frames, and send them to the bus through the physical layer. They also receive CAN frames from the bus, parse them, and transmit them to the device's control module 50. The CAN bus communication module 40 is mounted on the conversion substrate 10, and the number of CAN bus communication interfaces 41 in the CAN bus communication module 40 corresponds to the number of Ethernet communication interfaces 31. This ensures that when all Ethernet communication interfaces 31 of the Ethernet communication module 30 are in normal communication mode, there is a one-to-one correspondence between the CAN bus communication interfaces 41 and the Ethernet communication interfaces 31, thereby enabling rapid data upload and download.

[0057] Optionally, the CAN bus communication module 40 further includes a plurality of CAN bus transceiver circuits 42, the first ends of the plurality of CAN bus transceiver circuits 42 being electrically connected to the CAN bus communication interface 41 in a one-to-one correspondence, and the second ends of the plurality of CAN bus transceiver circuits 42 being communicatively connected to the control module 50.

[0058] In this embodiment, the number of CAN bus transceiver circuits 42 corresponds to the number of CAN bus communication interfaces 41, and they are electrically connected one-to-one. It can be understood that the function of the CAN bus transceiver circuit 42 is to convert the logic level signals sent by the control module 50 into differential signals required by the CAN bus, drive the physical bus, support multi-node communication, and provide a certain degree of electrical isolation and anti-interference capability. Each CAN bus communication interface 41 represents an independent CAN communication channel, connected to an independent CAN network, i.e., a lower-level machine. The lower-level machine can be a corresponding powertrain system, body system, etc. By connecting each CAN bus communication interface 41 to an independent CAN bus transceiver circuit 42, electrical drive and communication are achieved.

[0059] Optionally, the CAN bus communication module 40 further includes a plurality of CAN communication protection circuits 43, the first ends of the plurality of CAN communication protection circuits 43 being electrically connected to a plurality of CAN bus communication interfaces 41 in a one-to-one correspondence, and the second ends of the plurality of CAN communication protection circuits 43 being electrically connected to a plurality of CAN bus transceiver circuits 42 in a one-to-one correspondence; the CAN communication protection circuits 43 are used to prevent external electrical abnormalities from damaging the communication conversion device.

[0060] In this embodiment, by setting a CAN communication protection circuit 43 between the CAN bus communication interface 41 and the CAN bus transceiver circuit 42, external electrical interference and abnormal events can effectively prevent damage to the CAN bus transceiver circuit 42 and the back-end control module 50. It is understood that the CAN bus is often used in long-distance, high-interference environments, which can lead to static electricity generated when operators plug and unplug connectors, potentially damaging the transceiver circuit chip. Furthermore, high-frequency noise affects signal integrity, causing communication errors or interruptions. Specifically, the CAN communication protection circuit 43 can be implemented using TVS diodes, PTC resettable fuses, gas discharge tubes, or varistors, etc.

[0061] In this embodiment, the control module 50 is configured to isolate the communication path between the Ethernet communication interfaces 31 in a first communication mode and to enable the communication path between the Ethernet communication interfaces 31 in a second communication mode. It can be understood that the first communication mode is VLAN enabled, and the second communication module is VLAN disabled. VLAN (Virtual Local Area Network) is a network technology implemented on switches or devices supporting network management functions. Its main function is to logically divide a physical local area network into multiple independent broadcast domains, even if these devices are connected to the same physical network. When VLAN mode is enabled, devices in different VLANs cannot communicate directly by default, improving security. For example, the finance department and the R&D department can be divided into different VLANs to prevent unauthorized access to information. When VLAN mode is disabled, any Ethernet communication interface 31 can communicate with multiple CAN bus communication interfaces 41.

[0062] This application employs a communication conversion device to effectively improve the reliability of equipment when converting between Ethernet and CAN communication. The communication conversion device includes a conversion base plate 10 and a core base plate 20, both equipped with COME connectors for modular connection. Furthermore, the communication conversion device also includes an Ethernet communication module 30, a CAN bus communication module 40, and a control module 50. The Ethernet communication module 30 and the CAN bus communication module 40 are mounted on the conversion base plate 10, and the control module 50 is mounted on the core base plate 20. Additionally, the Ethernet communication module 30 and the CAN bus communication module 40 each include at least two Ethernet communication interfaces 31 and two CAN bus communication interfaces 41, with the number of Ethernet communication interfaces 31 corresponding to the number of CAN bus communication interfaces 41. The control module 50 is configured to isolate the communication path between the Ethernet communication interfaces 31 in a first communication mode and to enable the communication path between the Ethernet communication interfaces 31 in a second communication mode. In the first communication mode, the Ethernet communication interface 31 and the CAN bus communication interface 41 communicate one-to-one without interfering with each other; in the second communication mode, the Ethernet communication interfaces 31 communicate with each other, and the Ethernet communication interface 31 and the CAN bus communication interface 41 do not correspond, thus ensuring that communication can still proceed normally when a certain Ethernet communication interface 31 fails.

[0063] In one embodiment of the present invention, the control module 50 is specifically configured as follows:

[0064] If at least one of the Ethernet communication interfaces 31 experiences a communication failure, the communication mode will be switched to a second communication mode; or,

[0065] When all of the Ethernet communication interfaces 31 are in normal communication mode, the communication mode is switched to the first communication mode.

[0066] In this embodiment, the control module 50 is configured to automatically switch between the first communication mode and the second communication mode, that is, the control module 50 is configured to automatically enable or disable the VLAN function. As described above, in the first communication mode, the control module 50 controls and isolates the communication path between the Ethernet communication interfaces 31; in the second communication mode, the control module 50 enables the communication path between the Ethernet communication interfaces 31. Therefore, the control module 50 can confirm whether the Ethernet communication interfaces 31 are in a normal communication state through the corresponding detection circuit. When all the Ethernet communication interfaces 31 are communicating normally, the control module 50 switches the communication mode to the first communication mode. At this time, the control module 50 controls and isolates the path between the Ethernet communication interfaces 31. In this way, the Ethernet communication interfaces 31 correspond one-to-one with the CAN bus communication interfaces 41, thereby isolating the communication data, avoiding data interference, and improving the security of data transmission. When the control module 50 confirms through the corresponding detection circuit that at least one of the Ethernet communication interfaces 31 has a communication failure, it can switch the communication module to the second communication mode. At this time, the control module 50 will control the connection between the Ethernet communication interfaces 31. In this way, the CAN bus communication interface 41, which was originally connected to the Ethernet communication interface 31 with communication failure, can upload or receive the corresponding communication information through other normal Ethernet communication interfaces 31, thereby effectively ensuring the stability of communication between the lower-level machine and the upper-level machine.

[0067] In one embodiment of the present invention, the communication conversion device further includes a trigger input module, the output terminal of which is electrically connected to the control module 50, and the trigger input module is used to output a corresponding trigger signal when triggered; the control module 50 is specifically configured as follows:

[0068] When the trigger input module is triggered and outputs the first trigger signal, the control module 50 executes the first communication mode;

[0069] When the trigger input module is triggered and outputs the second trigger signal, the control module 50 executes the second communication mode.

[0070] In this embodiment, the control module 50 is configured to manually switch between the first and second communication modes, that is, the control module 50 is configured to manually enable or disable the VLAN function. As described above, in the first communication mode, the control module 50 controls the communication path between the isolated Ethernet communication interfaces 31; in the second communication mode, the control module 50 opens the communication path between the Ethernet communication interfaces 31. By setting a trigger input module, a corresponding trigger signal is output when triggered, causing the communication conversion device to switch to the corresponding communication mode, thereby meeting the user's different communication needs.

[0071] This invention also proposes a communication system comprising at least two host computers, at least two slave computers, and a communication conversion device as described in any of the preceding claims; wherein the host computers are electrically connected to the Ethernet communication interface 31; and the slave computers are electrically connected to the CAN bus communication interface 41. It is worth noting that since the communication system of this invention is based on the aforementioned communication conversion device, the embodiments of the communication system of this invention include all the technical solutions of all embodiments of the aforementioned communication conversion device, and the achieved technical effects are completely identical, and will not be repeated here.

[0072] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A communication conversion device, characterized in that, The communication conversion device includes: Conversion substrate; The core substrate is electrically connected to the conversion substrate via a COME connector; An Ethernet communication module is disposed on the conversion substrate and includes at least two Ethernet communication interfaces; A CAN bus communication module is disposed on the conversion substrate and includes at least two CAN bus communication interfaces; A control module is mounted on the core substrate. The first end of the control module is connected to the Ethernet communication module via the COME connector, and the second end of the control module is electrically connected to the CAN bus communication module via the COME connector. The number of Ethernet communication interfaces corresponds to the number of CAN bus communication interfaces; the control module is configured to isolate the communication path between the Ethernet communication interfaces in a first communication mode, and to enable the communication path between the Ethernet communication interfaces in a second communication mode. The control module is specifically configured as follows: If at least one of the multiple Ethernet communication interfaces experiences a communication failure, the communication mode will be switched to the second communication mode; or, When all of the Ethernet communication interfaces are functioning normally, the communication mode is switched to the first communication mode; The communication conversion device further includes a trigger input module, the output of which is electrically connected to the control module. The trigger input module is used to output a corresponding trigger signal when triggered. The control module is specifically configured as follows: When the trigger input module is triggered and outputs the first trigger signal, the control module executes the first communication mode; When the trigger input module is triggered and outputs a second trigger signal, the control module executes the second communication mode.

2. The communication conversion device as described in claim 1, characterized in that, The Ethernet communication module further includes multiple network transformer circuits, the first ends of which are electrically connected to the multiple Ethernet communication interfaces respectively, and the second ends of which are electrically connected to the COME connector.

3. The communication conversion device as described in claim 2, characterized in that, The Ethernet communication module further includes multiple network protection circuits. The first terminals of the multiple network protection circuits are electrically connected to the multiple Ethernet communication interfaces one by one, and the second terminals of the multiple network protection circuits are electrically connected to the multiple network transformer circuits one by one. The network protection circuits are used to prevent external electrical abnormalities from damaging the communication conversion device.

4. The communication conversion device as described in claim 2, characterized in that, The control module also includes: A network switching circuit, the first end of which is electrically connected to a plurality of network transformer circuits via the COME connector; A control circuit, which is electrically connected to the second terminal of the network switching circuit.

5. The communication conversion device as described in claim 1, characterized in that, The CAN bus communication module further includes multiple CAN bus transceiver circuits. The first end of each of the multiple CAN bus transceiver circuits is electrically connected to the CAN bus communication interface, and the second end of each of the multiple CAN bus transceiver circuits is communicatively connected to the control module.

6. The communication conversion device as described in claim 5, characterized in that, The CAN bus communication module also includes multiple CAN communication protection circuits. The first end of each of the multiple CAN communication protection circuits is electrically connected to a corresponding CAN bus communication interface, and the second end of each of the multiple CAN communication protection circuits is electrically connected to a corresponding CAN bus transceiver circuit. The CAN communication protection circuits are used to prevent external electrical abnormalities from damaging the communication conversion device.

7. The communication conversion device as described in claim 1, characterized in that, The communication conversion device further includes a power module, the input terminal of which is electrically connected to an external power input terminal, and the output terminal of which is electrically connected to the control module; the power module is used to convert the first voltage input to the external power input terminal into a second voltage and output it.

8. A communication system, characterized in that, The communication system includes at least two host computers, at least two slave computers, and a communication conversion device as described in any one of claims 1 to 7; The host computer is electrically connected to the Ethernet communication interface; the slave computer is electrically connected to the CAN bus communication interface.

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