Vehicle-mounted communication system

Abstract

The invention provides a vehicle-mounted communication system, which comprises a first communication module, a second communication module, a third communication module and a switching module, and is characterized in that the switching module is used for responding to a control signal to connect the first communication module with the second communication module or connect the first communication module with the third communication module; in other words, the switching module can connect the common communication module with the second communication module to form a link or connect the common communication module with the third communication module to form another link according to actual requirements instead of connecting the first communication module, the second communication module and the third communication module to a bus. Therefore, the length of the bus can be reduced, interference can be reduced, and the failure rate of the vehicle-mounted communication system can be reduced.

Description

Technical Field

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

[0002] With the development of railway train technology, vehicle communication technology has also developed rapidly. At present, the 300T vehicle equipment adopts a dual-system cold standby communication system, that is, there is a working communication system and a standby communication system, so the number of communication units is large, the bus length is long, the interference is large, and the system failure rate is large. Summary of the Invention

[0003] In view of this, this application provides a vehicle communication system, and the solution is as follows:

[0004] A vehicle communication system includes a first communication system, and the first communication system includes:

[0005] A first communication module, the first communication module includes A first communication units connected in series in sequence, A≥1;

[0006] A second communication module, the second communication module includes B second communication units connected in series in sequence, B≥1;

[0007] A third communication module, the third communication module includes C third communication units connected in series in sequence, C≥1;

[0008] A switching module, configured to connect the first communication module and the second communication module in response to a control signal, or connect the first communication module and the third communication module.

[0009] Optionally, the switching module is connected to a preset first communication unit, and includes a first switching unit and a second switching unit; wherein, the preset first communication unit belongs to one of the A first communication units;

[0010] The first switching unit is configured to connect the preset first communication unit and a preset second communication unit in response to the control signal; wherein, the preset second communication unit belongs to one of the N second communication units;

[0011] The second switching unit is configured to connect the preset first communication unit and a preset third communication unit in response to the control signal; wherein, the preset third communication unit belongs to one of the N third communication units.

[0012] Optionally, the first switching unit includes: a first analog switch, the first analog switch includes a first switching tube, a first end of the first switching tube is connected to the preset first communication unit, a second end of the first switching tube is connected to the preset second communication unit, and the first switching tube is configured to conduct in response to the control signal to connect the preset first communication unit and the preset second communication unit;

[0013] The second switching unit includes: a second analog switch, the second analog switch includes a second switching tube, a first end of the second switching tube is connected to the preset first communication unit, a second end of the second switching tube is connected to the preset third communication unit, and the second switching tube is configured to conduct in response to the control signal to connect the preset first communication unit and the preset third communication unit.

[0014] Optionally, the first switching unit further includes:

[0015] a first external terminal, one end of the first external terminal is connected to the second end of the first switching tube, and the other end is connected to the preset second communication unit;

[0016] a second external terminal, one end of the second external terminal is connected to the preset first communication unit, and the other end is configured to be connected to an adjacent unit of the preset first communication unit.

[0017] Optionally, the second switching unit further includes:

[0018] a third external terminal, one end of the third external terminal is connected to the second end of the second switching tube, and the other end is connected to the preset third communication unit;

[0019] a fourth external terminal, one end of the fourth external terminal is connected to the preset first communication unit, and the other end is configured to be connected to an adjacent unit of the preset first communication unit.

[0020] Optionally, the first analog switch is a four-channel switch chip, and the first switching tube includes a first sub-switching tube, a second sub-switching tube, a third sub-switching tube, and a fourth sub-switching tube;

[0021] The first ends of the first sub-switching tube and the second sub-switching tube are connected to a first signal port of the preset first communication unit, and the second ends of the first sub-switching tube and the second sub-switching tube are connected to a first signal port of the preset second communication unit; the first ends of the third sub-switching tube and the fourth sub-switching tube are connected to a second signal port of the preset first communication unit, and the second ends of the third sub-switching tube and the fourth sub-switching tube are connected to a second signal port of the preset second communication unit;

[0022] The second analog switch is a four-channel switch chip, and the second switching tube includes a fifth sub-switching tube, a sixth sub-switching tube, a seventh sub-switching tube, and an eighth sub-switching tube;

[0023] The first ends of the fifth sub-switching tube and the sixth sub-switching tube are connected to the first signal port of the preset first communication unit, and the second ends of the fifth sub-switching tube and the sixth sub-switching tube are connected to the first signal port of the preset third communication unit; the first ends of the seventh sub-switching tube and the eighth sub-switching tube are connected to the second signal port of the preset first communication unit, and the second ends of the seventh sub-switching tube and the eighth sub-switching tube are connected to the second signal port of the preset third communication unit.

[0024] Optionally, the first communication module further includes:

[0025] D first connectors, where D = A - 1, and the D first connectors are respectively provided in the first communication units except the preset first communication unit; the first connector is a first sub-connector or a second sub-connector, the first sub-connector is a single-pin connector, and the second sub-connector is a double-pin connector;

[0026] If the preset first communication unit is one terminal of the first communication module, the first connector includes 1 first sub-connector and D - 1 second sub-connectors. The first sub-connector is provided at the other terminal of the first communication module and is connected to the adjacent first communication unit through its pin, and the second sub-connector is respectively connected to the previous first communication unit and the next first communication unit through its pins.

[0027] Optionally, the second communication module further includes:

[0028] B second connectors, and the B second connectors are respectively provided in the B second communication units; the second connector is a third sub-connector or a fourth sub-connector, the third sub-connector is a single-pin connector, and the fourth sub-connector is a double-pin connector;

[0029] If the preset second communication unit is one terminal of the second communication module, the B second connectors include 1 third sub-connector and B - 1 fourth sub-connectors. The third sub-connector is provided at the other terminal of the second communication module and is connected to the adjacent second communication unit through its pin; one pin of the fourth sub-connector provided in the preset second communication unit among the B - 1 fourth sub-connectors is connected to the second end of the first switching tube, and the other pin is connected to the adjacent second communication unit, and the other fourth sub-connectors among the B - 1 fourth sub-connectors are respectively connected to the previous second communication unit and the next second communication unit through their pins;

[0030] The third communication module further includes:

[0031] C third connectors, where the C third connectors are respectively provided for the C third communication units; the third connector is a fifth sub-connector or a sixth sub-connector, the fifth sub-connector is a single-pin connector, and the sixth sub-connector is a double-pin connector;

[0032] If the preset third communication unit is a terminal of the third communication module, the C third connectors include 1 fifth sub-connector and C - 1 sixth sub-connectors. The fifth sub-connector is provided at the other terminal of the third communication module and is connected to an adjacent third communication unit through its pin; one pin of the sixth sub-connector provided in the preset third communication unit among the C - 1 sixth sub-connectors is connected to the second end of the second switching tube, and the other pin is connected to an adjacent third communication unit. The other sixth sub-connectors among the C - 1 sixth sub-connectors are respectively connected to the previous third communication unit and the next third communication unit through their pins.

[0033] Optionally, the second communication module further includes:

[0034] B second connectors, where the B second connectors are respectively provided for the B second communication units; the second connector is a fourth sub-connector or a seventh sub-connector, the fourth sub-connector is a double-pin connector, and the seventh sub-connector includes an input plug and an output plug;

[0035] If the preset second communication unit is a terminal of the second communication module, the B second connectors include B - 2 fourth sub-connectors and 2 seventh sub-connectors. The first seventh sub-connector among the 2 seventh sub-connectors is provided at the other terminal of the second communication module, and the output plug of the second seventh sub-connector is connected to the input plug of the first seventh sub-connector; one pin of the fourth sub-connector in the B - 2 fourth sub-connectors that is connected to the preset second communication unit is connected to the second end of the first switching tube, and the other pin is connected to an adjacent second communication unit. The remaining fourth sub-connectors are respectively connected to the previous second communication unit and the next second communication unit through their pins;

[0036] The third communication module further includes:

[0037] C third connectors, where the C third connectors are respectively provided for the C third communication units; the third connector is a sixth sub-connector or an eighth sub-connector, the sixth sub-connector is a double-pin connector, and the eighth sub-connector includes an input plug and an output plug;

[0038] If the preset third communication unit is a terminal of the third communication module, the C third connectors include C - 2 sixth sub - connectors and 2 eighth sub - connectors. The first eighth sub - connector of the 2 eighth sub - connectors is arranged at the other terminal of the third communication module, and the output plug of the second eighth sub - connector is connected to the input plug of the first eighth sub - connector; One pin of the sixth sub - connector of the B - 2 sixth sub - connectors that is connected to the preset third communication unit is connected to the second end of the second switching tube, and the other pin is connected to the adjacent third communication unit. The remaining sixth sub - connectors are respectively connected to the previous third communication unit and the next third communication unit through their pins.

[0039] Optionally, it further includes:

[0040] A second communication system, which includes M fourth communication units and M fourth connectors connected in series in sequence, where M≥3;

[0041] The M fourth connectors are arranged corresponding to the M fourth communication units one by one; The fourth connector is a ninth sub - connector, a tenth sub - connector or an eleventh sub - connector. The ninth sub - connector is a single - pin connector, the tenth sub - connector is a double - pin connector, and the eleventh sub - connector includes an input plug and an output plug;

[0042] If M≥5, the M fourth connectors include 1 ninth sub - connector, M - 4 tenth sub - connectors, and 3 eleventh sub - connectors. The ninth sub - connector is arranged at the terminal of the second communication system and is connected to the adjacent fourth communication unit through its pin; The first eleventh sub - connector of the 3 eleventh sub - connectors is arranged at the other terminal of the second communication system. The output plug of the second eleventh sub - connector is connected to the input plug of the first eleventh sub - connector, and the output plug of the third eleventh sub - connector is connected to the input plug of the second eleventh sub - connector; The tenth sub - connector is respectively connected to the previous fourth communication unit and the next fourth communication unit through its pins;

[0043] A third communication system, which includes N fifth communication units and N fifth connectors connected in series in sequence, where N≥3;

[0044] The N fifth connectors are arranged corresponding to the N fifth communication units one by one; The N fifth connectors are 2 twelfth sub - connectors and N - 2 thirteenth sub - connectors. The twelfth sub - connector is a single - pin connector, and the thirteenth sub - connector is a double - pin connector;

[0045] The first of the two twelfth sub-connectors is disposed at one terminal of the third communication system and is connected to an adjacent fifth communication unit through its pins. The second twelfth sub-connector is disposed at the other terminal of the third communication system and is connected to an adjacent fifth communication unit through its pins. The thirteenth sub-connector is connected to the previous fifth communication unit and the subsequent fifth communication unit through its pins respectively.

[0046] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0047] The in-vehicle communication system provided by the present application includes: a first communication module, a second communication module, a third communication module, and a switching module. The switching module is configured to connect the first communication module to the second communication module or connect the first communication module to the third communication module in response to a control signal. That is to say, the switching module can connect the shared communication module to the second communication module to form a link or connect it to the third communication module to form another link according to actual needs, rather than connecting the first communication module, the second communication module, and the third communication module on a single bus, thereby helping to reduce the length of the bus, reduce interference, and further helping to reduce the failure rate of the in-vehicle communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0049] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions that the present application can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope that can be covered by the technical content disclosed in the present application without affecting the effects that the present application can produce and the purposes that can be achieved.

[0050] Figure 1 FIG. 18 is a schematic diagram of the MVB-S connection relationship of an existing in-vehicle communication system;

[0051] Figure 2 FIG. 22 is a schematic diagram of the MVB-T connection relationship of an existing in-vehicle communication system;

[0052] Figure 3 FIG. 26 is a schematic diagram of the Profibus connection relationship of an existing in-vehicle communication system;

[0053] Figure 4 A structural schematic diagram of a vehicle-mounted communication system provided for this application;

[0054] Figure 5 Another structural schematic diagram of a vehicle-mounted communication system provided for this application;

[0055] Figure 6 Another structural schematic diagram of a vehicle-mounted communication system provided for this application;

[0056] Figure 7 Another structural schematic diagram of a vehicle-mounted communication system provided for this application;

[0057] Figure 8 Another structural schematic diagram of a vehicle-mounted communication system provided for this application. Detailed implementation manners

[0058] Next, the embodiments in this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a partial embodiment of this application, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0059] To make the above objects, features, and advantages of this application more obvious and understandable, the following further details this application in conjunction with the accompanying drawings and specific implementation manners.

[0060] As described in the background art section, there are a relatively large number of communication units in the current vehicle-mounted communication system, and both the working communication unit and the standby communication unit are connected in series through a single bus, so the bus length is relatively long, there is more interference, and thus the system failure rate is relatively high.

[0061] In addition, as Figures 1-3 shown, Figure 1 is the bus connection relationship of MVB-S in the existing vehicle-mounted communication system, Figure 2 is the MVB-T bus connection relationship in the existing vehicle-mounted communication system, Figure 3 the Profibus bus connection relationship in the existing vehicle-mounted communication system. According to Figures 1-3 it can be seen that when a certain cable or connector has poor conductivity, it will affect the communication system, and even a faulty unit that is not powered on may also affect another unit. Therefore, it is necessary to propose an optimized bus connection design solution to solve this problem. It should be noted that for a vehicle-mounted communication system, each communication system includes an A-series unit, a B-series unit, and a shared unit. Only for the MVB-T communication system, there are redundant communication units, that is, when the MVB-T communication system is in a working state, there are communication units that are not working.

[0062] Based on the above, the present application provides a vehicle-mounted communication system, as Figure 4 shown, Figure 4 is a bus connection diagram of a vehicle-mounted communication system provided by the present application. The vehicle-mounted communication system includes a first communication system, and the first communication system includes:

[0063] A first communication module 100, where the first communication module 100 includes A first communication units 101 connected in series in sequence, and A≥1.

[0064] A second communication module 200, where the second communication module 200 includes B second communication units 201 connected in series in sequence, and B≥1.

[0065] A third communication module 300, where the third communication module 300 includes C third communication units 301 connected in series in sequence, and C≥1.

[0066] A switching module 400, configured to connect the first communication module 100 to the second communication module 200 or connect the first communication module 100 to the third communication module 300 in response to a control signal.

[0067] It should be noted that for the MVB-S communication system of the vehicle-mounted communication system, there are two communication links. Only one communication link is in a working state during operation, and there are also shared units between the two communication links. According to the above, the first communication module 100 is a shared communication module, and the first communication unit 101 therein is a shared communication unit. The connection between the first communication module 100 and the second communication module 200 and the connection between the first communication module 100 and the third communication module 300 form the above two communication links. And according to the above, it is also known that the vehicle-mounted communication system includes a switching module 400, which switches the connection between the first communication module 100 and the second communication module 200, or switches the connection between the first communication module 100 and the third communication module 300. That is to say, the switching module 400 can connect the shared communication module to the second communication module 200 to form one link or connect it to the third communication module 300 to form another link according to actual needs, rather than connecting the first communication module 100, the second communication module 200, and the third communication module 300 on a single bus, which helps to reduce the length of the bus, reduce interference, and further helps to reduce the failure rate of the vehicle-mounted communication system.

[0068] In addition, the switching module 400 can connect the shared communication module to the second communication module 200 to form a link according to actual requirements, or connect to the third communication module 300 to form another link, rather than connecting the first communication module 100, the second communication module 200, and the third communication module 300 on a common bus. This can also prevent a certain communication unit on the second communication module 300 and the third communication module 300 from being damaged, which may cause the entire first communication system to malfunction, and helps ensure the stable operation of the vehicle-mounted communication system.

[0069] On this basis, in an embodiment of the present application, the switching module 400 is connected to a preset first communication unit 102. The switching module 400 includes a first switching unit 401 and a second switching unit 402. Among them, the preset first communication unit 102 is one of the above-mentioned A first communication units 101.

[0070] The first switching unit 401 is configured to respond to the control signal and connect the preset first communication unit 102 to a preset second communication unit 202, where the preset second communication unit 202 is one of the above-mentioned B second communication units 201.

[0071] The second switching unit 402 is configured to respond to the control signal and connect the preset first communication unit to a preset third communication unit 302, where the preset third communication unit 302 is one of the above-mentioned C third communication units.

[0072] Based on the above, the switching module 400 can respond to the control signal to connect the first communication module 100 to the second communication module 200, or connect the first communication module 100 to the third communication module 300.

[0073] Specifically, as Figure 4 shown, the first switching unit 401 includes: a first analog switch 4011. The first analog switch 4011 includes a first switching tube 4012. The first end of the first switching tube 4012 is connected to the preset first communication unit 102, and the second end of the first switching tube 4012 is connected to the preset second communication unit 202. The first switching tube 4012 is configured to conduct in response to the control signal to connect the preset first communication unit 102 to the preset second communication unit 202. Thus, the first switching unit 401 can respond to the control signal to connect the first communication module 100 to the second communication module 200.

[0074] The second switching unit 402 includes: a second analog switch 4021, the second analog switch 4021 includes a second switching tube 4022, a first end of the second switching tube 4022 is connected to the preset first communication unit 102, a second end of the second switching tube 4022 is connected to the preset third communication unit 302, and the second switching tube 4022 is configured to conduct in response to the control signal to connect the preset first communication unit 102 and the preset third communication unit 302, so that the second switching unit 402 can connect the first communication module 100 and the third communication module 300 in response to the control signal.

[0075] On this basis, in an embodiment of the present application, the first switching unit 401 further includes:

[0076] A first external terminal 4013, one end of the first external terminal 4013 is connected to the second end of the first switching tube 4012, and the other end is connected to the preset second communication unit 202, that is, the second end of the first switching tube 4012 is connected to the preset second communication unit 202 through the first external terminal 4013, so that the first switching tube 4012 can be connected to the preset second communication unit 202.

[0077] A second external terminal 4014, one end of the second external terminal 4014 is connected to the preset first communication unit 102, and the other end is used to be connected to an adjacent unit of the preset first communication unit 102.

[0078] And, the second switching unit 402 further includes:

[0079] A third external terminal 4023, one end of the third external terminal 4023 is connected to the second end of the second switching tube 4022, and the other end is connected to the preset third communication unit 302, that is, the second end of the second switching tube 4022 is connected to the preset third communication unit 302 through the third external terminal, so that the second end of the second switching tube 4022 can be connected to the preset third communication unit 302.

[0080] A fourth external terminal 4024, one end of the fourth external terminal 4024 is connected to the preset first communication unit 102, and the other end is used to be connected to an adjacent unit of the preset first communication unit 102.

[0081] Regarding the second external terminal 4014 and the fourth external terminal 4024, according to Figure 4It can be known that for the first communication unit 101 adjacent to the preset first communication unit 102 in the first communication module 100, when the two are connected, the preset first communication unit 102 can be connected to the adjacent first communication unit 101 through the first switching unit 401, or can be connected to the adjacent first communication unit 101 through the second switching unit 402. This application does not limit this, and it depends on the specific situation. In a specific embodiment of this application, the preset first communication unit 102 is connected to the adjacent first communication unit 101 through the second switching unit 402.

[0082] In order to ensure the accurate response of the first analog switch 4011 and the second analog switch 4021 to the control signal, on this basis, in an embodiment of this application, the first analog switch 4011 is a four-channel switch chip, and the first switching transistor 4012 includes a first sub-switching transistor 40121, a second sub-switching transistor 40122, a third sub-switching transistor 40123, and a fourth sub-switching transistor 40144. Specifically, the first ends of the first sub-switching transistor 40121 and the second sub-switching transistor 40122 are connected to the first signal port of the preset first communication unit 102, and the second ends of the first sub-switching transistor 40121 and the second sub-switching transistor 40122 are connected to the first signal port of the preset second communication unit 202; the first ends of the third sub-switching transistor 40123 and the fourth sub-switching transistor 40124 are connected to the second signal port of the preset first communication unit 102, and the second ends of the third sub-switching transistor 40123 and the fourth sub-switching transistor 40124 are connected to the second signal port of the preset second communication unit 202. Among them, the first signal ports and the second signal ports of the preset first communication unit 102 and the preset second communication unit 202 are respectively the signal ports of two differential signals.

[0083] The second analog switch 4021 is a four-channel switch chip. The second switch tube 4022 includes a fifth sub-switch tube 40221, a sixth sub-switch tube 40222, a seventh sub-switch tube 40223, and an eighth sub-switch tube 40224. Specifically, the first ends of the fifth sub-switch tube 40221 and the sixth sub-switch tube 40222 are connected to the first signal port of the preset first communication unit 102, and the second ends of the fifth sub-switch tube 40221 and the sixth sub-switch tube 40222 are connected to the first signal port of the preset third communication unit 302. The first ends of the seventh sub-switch tube 40223 and the eighth sub-switch tube 40224 are connected to the second signal port of the preset first communication unit 102, and the second ends of the seventh sub-switch tube 40223 and the eighth sub-switch tube 40224 are connected to the second signal port of the preset third communication unit 302. Among them, the first signal port and the second signal port of the preset third communication unit 302 are respectively the signal ports of two differential signals.

[0084] On the basis of the above, in an embodiment of the present application, the first communication module 100 further includes:

[0085] D first connectors 103, the D first connectors 103 are respectively arranged in the first communication units 101 except the preset first communication unit 102 in a one-to-one correspondence. The first connector 103 is a first sub-connector 1031 or a second sub-connector 1032. The first sub-connector 1031 is a single-pin connector, and the second sub-connector 1032 is a double-pin connector.

[0086] If the preset first communication unit 102 is a terminal of the first communication module 100, that is, the preset first communication unit 102 is located at one end of a link formed by a series connection of multiple first communication units 101 in the first communication module 100, the first connector 103 includes 1 first sub-connector 1031 and D - 1 second sub-connectors 1032. The first sub-connector 1031 is arranged at the other terminal of the first communication module 100 and is connected to the adjacent first communication unit 101 through its pin. The second sub-connector 1032 is respectively connected to the previous first communication unit 101 and the next first communication unit 101 through its pins. Among them, one pin of a second sub-connector 1032 is connected to the terminal of the first communication module 100, and the other pin is connected to the adjacent first communication unit 101, and one pin of a second sub-connector 1032 is connected to the preset first communication unit 102, and the other pin is connected to the adjacent first communication unit 101. It should be noted that the above-mentioned first connector 103 is connected to the adjacent first communication unit 101 through its pin, which means connecting to a pin of the first connector 103 of the adjacent first communication unit.

[0087] In addition, if the first communication unit 102 is preset as a non-terminal of the first communication module 100, that is, the first communication unit 102 is preset to be arranged at the middle first communication unit 101 of the first communication module 100, then the above-mentioned D first connectors include 2 first sub-connectors 1031 and D-2 second sub-connectors 1032. The above-mentioned 2 first sub-connectors 1031 are respectively arranged at both terminals of the first communication module 100 and are connected to the adjacent first communication unit 101 through their pins. The above-mentioned D-2 second sub-connectors 1032 are respectively connected to the previous first communication unit 101 and the next first communication unit 101 through their pins. Among them, one pin of a second sub-connector 1032 is connected to the adjacent first communication unit 101, and the other pin is connected to the first conversion unit 401 (or the second conversion unit 402) in the preset first communication unit 102, and one pin of a second sub-connector 1032 is connected to the first conversion unit 401 (or the second conversion unit 402) in the preset first communication unit 102, and the other pin is connected to the adjacent first communication unit 101.

[0088] It should be noted that in the existing vehicle-mounted communication system, the first communication unit 101 is provided with two cable plugs, specifically DB9 cable plugs, one as an input port and one as an output port. That is to say, for the existing vehicle-mounted communication system, each communication unit needs to be configured with two cable plugs for connection between communication units. This leads to a large number of connectors in the existing vehicle-mounted communication system and a high cost. And the input and output of the communication unit are realized through two independent cable plugs, which also increases the probability of connection problems. As can be seen from the above, compared with the prior art, the vehicle-mounted communication system provided by the present application uses a double-pin connector to realize the connection between adjacent first communication units 101, thus greatly reducing the number of connectors in the first communication system 100, reducing the cost of the vehicle-mounted communication system, and at the same time improving the connection stability of the system.

[0089] It should also be noted that the above-mentioned first sub-connector 1031 can also be a double-pin connector. If it is a double-pin connector, then it can be connected to the adjacent first communication unit 101 through one of its pins, and the other pin can be used to connect to other components or communication systems.

[0090] On the above basis, in an embodiment of the present application, the second communication module 200 further includes:

[0091] B second connectors 203, where the B second connectors 203 are respectively arranged corresponding to the B second communication units 200; the second connector 203 is a third sub-connector 2031 or a fourth sub-connector 2032, the third sub-connector 2031 is a single-pin connector, and the fourth sub-connector 2032 is a double-pin connector.

[0092] If the preset second communication unit 202 is a terminal of the second communication module 200, the B second connectors 203 include 1 third sub-connector 2031 and B - 1 fourth sub-connectors 3032. The third sub-connector 2031 is arranged at the other terminal of the second communication module 200 and is connected to the adjacent second communication unit 201 through its pin. One pin of the fourth sub-connector 2032 arranged in the preset second communication unit 202 among the B - 1 fourth sub-connectors 2032 is connected to the second end of the first switching tube 4012, and the other pin is connected to the adjacent second communication unit 201. The other fourth sub-connectors 2032 among the B - 1 fourth sub-connectors 2032 are respectively connected to the previous second communication unit 202 and the next second communication unit 201 through their pins.

[0093] The third communication module 300 further includes:

[0094] C third connectors 303, where the C third connectors 303 are respectively arranged corresponding to the C third communication units 301. The third connector 303 is a fifth sub-connector 3031 or a sixth sub-connector 3032, the fifth sub-connector 3031 is a single-pin connector, and the sixth sub-connector 3032 is a double-pin connector.

[0095] If the preset third communication unit 302 is a terminal of the third communication module 300, the C third connectors 303 include 1 fifth sub-connector 3031 and C - 1 sixth sub-connectors 3032. The fifth sub-connector 3031 is arranged at the other terminal of the third communication module 300 and is connected to the adjacent third communication unit 301 through its pin; one pin of the sixth sub-connector 3032 arranged in the preset third communication unit 302 among the C - 1 sixth sub-connectors 3032 is connected to the second end of the second switching tube 4022, and the other pin is connected to the adjacent third communication unit 301. The other sixth sub-connectors 3032 among the C - 1 sixth sub-connectors 3032 are respectively connected to the previous third communication unit 301 and the next third communication unit 301 through their pins.

[0096] As described above, for the second communication module 200 and the third communication module 300, two cable plugs on the original communication unit are replaced by double-pin connectors, thereby reducing the number of connectors in the second communication module 200 and the third communication module 300, saving costs, and reducing the probability of connection failures.

[0097] In another embodiment of the present application, as Figure 6 shown, the second communication module 200 further includes:

[0098] B second connectors 203, and the B second connectors 203 are respectively disposed on the B second communication units 201 in one-to-one correspondence. The second connector 203 is a fourth sub-connector 2032 or a seventh sub-connector 2033. The fourth sub-connector 2032 is a double-pin connector, and the seventh sub-connector 2033 includes an input plug and an output plug, that is, the seventh sub-connector 2033 includes the input plug and the output plug in the existing communication system.

[0099] If the preset second communication unit 202 is a terminal of the second communication module 200, the B second connectors 203 include B - 2 fourth sub-connectors 2032 and 2 seventh sub-connectors 2033. The first seventh sub-connector 2032 of the 2 seventh sub-connectors 2032 is disposed at the other terminal of the second communication module 100, and the output plug of the second seventh sub-connector 2033 is connected to the input plug of the first seventh sub-connector 2033, that is, the above 2 seventh sub-connectors 2033 are respectively disposed on two second communication units 201 adjacent to the tail end of the second communication module 200. One pin of the fourth sub-connector 2032 of the B - 2 fourth sub-connectors 2032 that is connected to the fourth sub-connector 2032 of the preset second communication unit 202 is connected to the second end of the first switching tube 4012, and the other pin is connected to the adjacent second communication unit 201. The remaining fourth sub-connectors 2032 are respectively connected to the previous second communication unit 201 and the next second communication unit 201 through their pins. It should be noted that the remaining fourth sub-connectors 2032 are respectively connected to the previous second communication unit 201 and the next second communication unit 201 through their pins, including one fourth sub-connector 2032 connected to the preset second communication unit 202.

[0100] The third communication module further includes:

[0101] C third connectors 303, and the C third connectors 303 are respectively disposed on the C third communication units 301 in one-to-one correspondence. The third connector 303 is a sixth sub-connector 3032 or an eighth sub-connector 3033. The sixth sub-connector 3032 is a double-pin connector, and the eighth sub-connector 3033 includes an input plug and an output plug, that is, the eighth sub-connector 3033 includes the input plug and the output plug in the existing communication system.

[0102] If the preset third communication unit 302 is a terminal of the third communication module 300, the C third connectors include C-2 sixth sub-connectors 3032 and 2 eighth sub-connectors 3033. The first eighth sub-connector 3033 of the 2 eighth sub-connectors 3033 is disposed at the other terminal of the third communication module 300, and the output plug of the second eighth sub-connector 3033 is connected to the input plug of the first eighth sub-connector 3033, that is, the above 2 eighth sub-connectors 3033 are respectively disposed on two third communication units 301 adjacent to the tail end of the third communication module 300. One pin of the sixth sub-connector 3032 of the C-2 sixth sub-connectors 3032 that is connected to the sixth sub-connector 3032 of the preset third communication unit 302 is connected to the second end of the second switching tube 4022, and the other pin is connected to the adjacent third communication unit 301. The remaining sixth sub-connectors 3032 are respectively connected to the previous third communication unit 301 and the subsequent third communication unit 301 through their pins.

[0103] As can be seen from the above, the difference between this embodiment and the above embodiment is that the connectors of two second communication units 201 adjacent to the tail end of the second communication module 200 are cable plugs, and the connectors of two third communication units 301 adjacent to the tail end of the third communication module 300 are cable plugs. It should be noted that in practical applications, the distance between two second communication units 201 adjacent to the tail end of the second communication module 200 and two third communication units 301 adjacent to the tail end of the third communication module 300 in the MVB-S link is relatively long, and cable plugs are required for connection. Therefore, the connectors of two second communication units 201 adjacent to the tail end of the second communication module 200 are cable plugs, and the connectors of two third communication units 301 adjacent to the tail end of the third communication module 300 are cable plugs

[0104] On the basis of the above, in an embodiment of the present application, the vehicle-mounted communication system further includes:

[0105] A second communication system, as Figure 7 shown, the second communication system includes M fourth communication units 501 connected in series in sequence, where M≥3. Specifically, the second communication system is an MVB-T communication system, and there is no redundant communication unit in the second communication system.

[0106] A third communication system, such as Figure 8 shown, the third communication system includes N fifth communication units 601 connected in series in sequence, N≥3. Specifically, the third communication system is a Profibus communication system, and there is no redundant communication unit in the third communication system.

[0107] On the above basis, in an embodiment of the present application, as Figure 7 shown, the second communication system further includes:

[0108] M fourth connectors 502, the M fourth connectors 502 are respectively arranged corresponding to the M fourth communication units 501. The fourth connector 502 is a ninth sub-connector 5021, a tenth sub-connector 5022 or an eleventh sub-connector 5023. The ninth sub-connector 5021 is a single-pin connector, the tenth sub-connector 5022 is a double-pin connector, and the eleventh sub-connector 5023 includes an input plug and an output plug.

[0109] If M≥5, the M fourth connectors 502 include 1 ninth sub-connector 5021, M - 4 tenth sub-connectors 5022, and 3 eleventh sub-connectors 5023. The ninth sub-connector 5021 is arranged at one terminal of the second communication system 500 and is connected to the adjacent fourth communication unit 501 through its pin. The first eleventh sub-connector 5023 of the 3 eleventh sub-connectors 5023 is arranged at the other terminal of the second communication system. The output plug of the second eleventh sub-connector 5023 is connected to the input plug of the first eleventh sub-connector 5023, and the output plug of the third eleventh sub-connector 5023 is connected to the input plug of the second eleventh sub-connector 5023, that is, the above 3 eleventh sub-connectors 5023 are arranged at 3 fourth communication units 501 adjacent to the tail end of the second communication system. The tenth sub-connector 5022 is respectively connected to the previous fourth communication unit 501 and the next fourth communication unit 501 through its pins. It should be noted that, the same as the foregoing, the purpose of the eleventh sub-connector 5023 in the second communication system is to solve the problem that the fourth communication units 501 adjacent to the tail end are far apart in practical applications.

[0110] The third communication system further includes:

[0111] N fifth connectors 602, where the N fifth connectors 602 are respectively arranged corresponding to the N fifth communication units 601. The N fifth connectors 602 include 2 twelfth sub - connectors 6021 and N - 2 thirteenth sub - connectors 6022. The twelfth sub - connector 6021 is a single - pin connector, and the thirteenth sub - connector 6022 is a double - pin connector.

[0112] The first of the 2 twelfth sub - connectors 6021 is arranged at one terminal of the third communication system and is connected to the adjacent fifth communication unit 601 through its pin. The second twelfth sub - connector 6021 is arranged at the other terminal of the third communication system and is connected to the adjacent fifth communication unit 601 through its pin. The thirteenth sub - connector 6022 is respectively connected to the previous fifth communication unit 601 and the next fifth communication unit 601 through its pins.

[0113] As can be seen from the above, the second communication system and the third communication system also use double - pin connectors to replace the original two cable plugs, thereby reducing the number of connectors in the second communication system and the third communication system, saving costs, and reducing the probability of connection failures.

[0114] It should be noted that whether it is the above - mentioned first communication system, second communication system or third communication system, the single - pin connector arranged at the terminal is provided with a resistor relative to the double - pin connector, aiming to balance the impedance and ensure the safe operation of the communication system.

[0115] In summary, the present application provides a vehicle - mounted communication system, which includes: a first communication module, a second communication module, a third communication module, and a switching module. The switching module is used to connect the first communication module to the second communication module or connect the first communication module to the third communication module in response to a control signal. That is to say, the switching module can connect the common communication module to the second communication module to form a link or connect it to the third communication module to form another link according to actual needs, rather than connecting the first communication module, the second communication module, and the third communication module on a single bus, thereby helping to reduce the length of the bus, reduce interference, and further helping to reduce the failure rate of the vehicle - mounted communication system.

[0116] In this specification, each embodiment is described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. The same or similar areas among the embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method section.

[0117] It should be noted that in the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present simultaneously.

[0118] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the above elements.

[0119] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle-mounted communication system, characterized in that, Including a first communication system, the first communication system comprising: A first communication module, the first communication module comprising A first communication units connected in series in sequence, where A ≥ 1; A second communication module, the second communication module comprising B second communication units connected in series in sequence, where B ≥ 1; A third communication module, the third communication module comprising C third communication units connected in series in sequence, where C ≥ 1; A switching module for connecting the first communication module to the second communication module or connecting the first communication module to the third communication module in response to a control signal.

2. The vehicle-mounted communication system according to claim 1, wherein The switching module is connected to a preset first communication unit and includes a first switching unit and a second switching unit; wherein, the preset first communication unit belongs to one of the A first communication units; The first switching unit is used to connect the preset first communication unit to a preset second communication unit in response to the control signal; wherein, the preset second communication unit belongs to one of the N second communication units; The second switching unit is used to connect the preset first communication unit to a preset third communication unit in response to the control signal; wherein, the preset third communication unit belongs to one of the N third communication units.

3. The vehicle-mounted communication system according to claim 2, wherein The first switching unit includes: a first analog switch, the first analog switch including a first switching tube, a first end of the first switching tube being connected to the preset first communication unit, a second end of the first switching tube being connected to the preset second communication unit, and the first switching tube being configured to conduct in response to the control signal to connect the preset first communication unit to the preset second communication unit; The second switching unit includes: a second analog switch, the second analog switch including a second switching tube, a first end of the second switching tube being connected to the preset first communication unit, a second end of the second switching tube being connected to the preset third communication unit, and the second switching tube being configured to conduct in response to the control signal to connect the preset first communication unit to the preset third communication unit.

4. The vehicle-mounted communication system according to claim 3, wherein The first switching unit further includes: A first external terminal, one end of the first external terminal being connected to the second end of the first switching tube and the other end being connected to the preset second communication unit; A second external terminal, one end of the second external terminal being connected to the preset first communication unit and the other end being configured to be connected to an adjacent unit of the preset first communication unit.

5. The vehicle-mounted communication system according to claim 3, wherein The second switching unit further includes: A third external terminal, one end of the third external terminal being connected to the second end of the second switching tube and the other end being connected to the preset third communication unit; A fourth external terminal, one end of the fourth external terminal being connected to the preset first communication unit and the other end being configured to be connected to an adjacent unit of the preset first communication unit.

6. The vehicle-mounted communication system according to claim 3, characterized in that, The first analog switch is a four-channel switch chip, and the first switching tube includes a first sub-switching tube, a second sub-switching tube, a third sub-switching tube, and a fourth sub-switching tube; The first ends of the first sub-switching transistor and the second sub-switching transistor are connected to the first signal port of the preset first communication unit, and the second ends of the first sub-switching transistor and the second sub-switching transistor are connected to the first signal port of the preset second communication unit; the first ends of the third sub-switching transistor and the fourth sub-switching transistor are connected to the second signal port of the preset first communication unit, and the second ends of the third sub-switching transistor and the fourth sub-switching transistor are connected to the second signal port of the preset second communication unit; The second analog switch is a four-channel switch chip, and the second switching transistor includes a fifth sub-switching transistor, a sixth sub-switching transistor, a seventh sub-switching transistor, and an eighth sub-switching transistor; The first ends of the fifth sub-switching transistor and the sixth sub-switching transistor are connected to the first signal port of the preset first communication unit, and the second ends of the fifth sub-switching transistor and the sixth sub-switching transistor are connected to the first signal port of the preset third communication unit; the first ends of the seventh sub-switching transistor and the eighth sub-switching transistor are connected to the second signal port of the preset first communication unit, and the second ends of the seventh sub-switching transistor and the eighth sub-switching transistor are connected to the second signal port of the preset third communication unit.

7. The vehicle-mounted communication system according to claim 6, wherein, The first communication module further includes: D first connectors, where D = A - 1, and the D first connectors are respectively arranged on the first communication units except the preset first communication unit; the first connector is a first sub-connector or a second sub-connector, the first sub-connector is a single-pin connector, and the second sub-connector is a double-pin connector; If the preset first communication unit is a terminal of the first communication module, the first connector includes 1 first sub-connector and D - 1 second sub-connectors, the first sub-connector is arranged at the other terminal of the first communication module and is connected to the adjacent first communication unit through its pin, and the second sub-connector is respectively connected to the previous first communication unit and the next first communication unit through its pins.

8. The vehicle-mounted communication system according to claim 7, wherein The second communication module further includes: B second connectors, and the B second connectors are respectively arranged on the B second communication units; the second connector is a third sub-connector or a fourth sub-connector, the third sub-connector is a single-pin connector, and the fourth sub-connector is a double-pin connector; If the preset second communication unit is a terminal of the second communication module, the B second connectors include 1 third sub-connector and B - 1 fourth sub-connectors, the third sub-connector is arranged at the other terminal of the second communication module and is connected to the adjacent second communication unit through its pin; one pin of the fourth sub-connector arranged on the preset second communication unit among the B - 1 fourth sub-connectors is connected to the second end of the first switching transistor, and the other pin is connected to the adjacent second communication unit, and the other fourth sub-connectors among the B - 1 fourth sub-connectors are respectively connected to the previous second communication unit and the next second communication unit through their pins; The third communication module further includes: C third connectors, where the C third connectors are respectively disposed on the C third communication units; the third connector is a fifth sub-connector or a sixth sub-connector, the fifth sub-connector is a single-pin connector, and the sixth sub-connector is a double-pin connector; If the preset third communication unit is one terminal of the third communication module, the C third connectors include 1 fifth sub-connector and C-1 sixth sub-connectors. The fifth sub-connector is disposed on the other terminal of the third communication module and is connected to the adjacent third communication unit through its pin. One pin of the sixth sub-connector disposed on the preset third communication unit among the C-1 sixth sub-connectors is connected to the second end of the second switching tube, and the other pin is connected to the adjacent third communication unit. The other sixth sub-connectors among the C-1 sixth sub-connectors are respectively connected to the previous third communication unit and the next third communication unit through their pins.

9. The vehicle-mounted communication system according to claim 7, wherein The second communication module further includes: B second connectors, where the B second connectors are respectively disposed on the B second communication units; the second connector is a fourth sub-connector or a seventh sub-connector, the fourth sub-connector is a double-pin connector, and the seventh sub-connector includes an input plug and an output plug; If the preset second communication unit is one terminal of the second communication module, the B second connectors include B-2 fourth sub-connectors and 2 seventh sub-connectors. The first seventh sub-connector among the 2 seventh sub-connectors is disposed on the other terminal of the second communication module, and the output plug of the second seventh sub-connector is connected to the input plug of the first seventh sub-connector. One pin of the fourth sub-connector connected to the preset second communication unit among the B-2 fourth sub-connectors is connected to the second end of the first switching tube, and the other pin is connected to the adjacent second communication unit. The remaining fourth sub-connectors are respectively connected to the previous second communication unit and the next second communication unit through their pins; The third communication module further includes: C third connectors, where the C third connectors are respectively disposed on the C third communication units; the third connector is a sixth sub-connector or an eighth sub-connector, the sixth sub-connector is a double-pin connector, and the eighth sub-connector includes an input plug and an output plug; If the preset third communication unit is one terminal of the third communication module, the C third connectors include C-2 sixth sub-connectors and 2 eighth sub-connectors. The first eighth sub-connector among the 2 eighth sub-connectors is disposed on the other terminal of the third communication module, and the output plug of the second eighth sub-connector is connected to the input plug of the first eighth sub-connector. One pin of the sixth sub-connector connected to the preset third communication unit among the B-2 sixth sub-connectors is connected to the second end of the second switching tube, and the other pin is connected to the adjacent third communication unit. The remaining sixth sub-connectors are respectively connected to the previous third communication unit and the next third communication unit through their pins.

10. The vehicle-mounted communication system according to claim 1, characterized in that, Further comprising: A second communication system, which includes M fourth communication units and M fourth connectors connected in series in sequence, where M ≥ 3; The M fourth connectors are respectively provided corresponding to the M fourth communication units; the fourth connectors are ninth sub-connectors, tenth sub-connectors or eleventh sub-connectors, the ninth sub-connector is a single-pin connector, the tenth sub-connector is a double-pin connector, and the eleventh sub-connector includes an input plug and an output plug; If M ≥ 5, the M fourth connectors include 1 ninth sub-connector, M - 4 tenth sub-connectors, and 3 eleventh sub-connectors. The ninth sub-connector is provided at one terminal of the second communication system and is connected to the adjacent fourth communication unit through its pin; the first eleventh sub-connector among the 3 eleventh sub-connectors is provided at the other terminal of the second communication system, the output plug of the second eleventh sub-connector is connected to the input plug of the first eleventh sub-connector, and the output plug of the third eleventh sub-connector is connected to the input plug of the second eleventh sub-connector; the tenth sub-connector is connected to the previous fourth communication unit and the next fourth communication unit respectively through its pins; A third communication system, which includes N fifth communication units and N fifth connectors connected in series in sequence, where N ≥ 3; The N fifth connectors are respectively provided corresponding to the N fifth communication units; the N fifth connectors are 2 twelfth sub-connectors and N - 2 thirteenth sub-connectors, the twelfth sub-connector is a single-pin connector, and the thirteenth sub-connector is a double-pin connector; The first twelfth sub-connector among the 2 twelfth sub-connectors is provided at one terminal of the third communication system and is connected to the adjacent fifth communication unit through its pin, the second twelfth sub-connector is provided at the other terminal of the third communication system and is connected to the adjacent fifth communication unit through its pin, and the thirteenth sub-connector is connected to the previous fifth communication unit and the next fifth communication unit respectively through its pins.

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