A contactless data transmission device, system and method between trains

Abstract

The present invention provides a non-contact data transmission device, system and method between trains, the device comprising: a mounting bracket fixedly connected to the coupler connector of the first train car; an optical signal transmission module fixed to the mounting bracket, comprising: a processor connected to the Ethernet link of the first train car through a data interface, for performing data conversion on the data sent and received by the train car; a data sending module connected to the processor, for converting the electrical signal output by the processor into an optical signal and sending the optical signal to the second train car, the second train car being connected to the first train car through the coupler connector; a data receiving module connected to the processor, for receiving an optical signal from the second train car, and converting the received optical signal into an electrical signal and sending it to the processor. The present application is wear-free, shock-resistant, has no electromagnetic wave leakage and has high reliability.

Description

Technical Field

[0001] The present application relates to train transmission technology, and in particular to a contactless data transmission device, system and method between trains. Background Art

[0002] In rail transit application scenarios, in order to meet different operational tasks and flexibly allocate transportation capacity, trains need to be able to adjust the number of carriages, use standardized couplers to connect between trains, and fully realize automatic mechanical, electrical and pneumatic connection between fully automatic couplers when trains are connected. The electrical connection includes hard-wired safety loops, hard-wired control lines, and communication network lines. Common coupler electrical connectors have 196 pins, of which 56 pins are plug-in type and the remaining 140 pins are point-contact type. The layout of the coupler pins on the two connected sides is completely unified, and the left and right sides are completely symmetrical. Figure 1A and Figure 1B shown.

[0003] As train communication rates gradually increase, the existing technology for transmitting data signals based on good contact of the copper core in the connector has defects in the train operation environment:

[0004] 1) Since the workshop connector is plugged in and out by the vehicle's automatic connection hook, it is limited by the mechanical structure and cannot ensure that the connectors at both ends are fully aligned in space. There are requirements for the mechanical strength of the copper needle of the workshop connector, and the diameter of the copper needle must be greater than 5mm. However, when the connector transmits signals at a higher rate, thinner copper needles can achieve lower impedance transmission. If thick needles are used, the signal quality will deteriorate;

[0005] 2) The traditional contact connection method relies on the good conductivity of the metal contact surface. If there is stain or foreign matter, the communication signal will be attenuated. In terms of maintenance, the coupler connector needs to be regularly dusted and cleaned, which is cumbersome.

[0006] 3) After multiple plugging and unplugging, the gold-plated surface of the connection will disappear due to wear, resulting in increased signal transmission loss on the coupler. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present application provides a non-contact data transmission device between trains, comprising:

[0008] A mounting bracket fixedly connected to a coupler connector of the first train carriage;

[0009] The optical signal transmission module is fixed on the mounting bracket and includes:

[0010] a processor connected to the Ethernet link of the first train car via a data interface, and configured to perform data conversion on data sent and received by the first train car;

[0011] a data transmission module connected to the processor, configured to convert the electrical signal output by the processor into an optical signal and transmit the optical signal to a second train car, the second train car being connected to the first train car via the coupler connector;

[0012] A data receiving module is connected to the processor and is used to receive an optical signal from the second train compartment, convert the received optical signal into an electrical signal and then send it to the processor.

[0013] In one embodiment, the processor comprises:

[0014] an analog-to-digital conversion module for converting an analog electrical signal into a digital electrical signal; and

[0015] A digital-to-analog conversion module used to convert digital electrical signals into analog electrical signals.

[0016] In one embodiment, the data transmission module includes an LED light source, a first convex lens and a first polarizer;

[0017] The LED light source is connected to the digital-to-analog conversion module and is used to convert the analog electrical signal output by the digital-to-analog conversion module into a corresponding optical signal; the optical signal is transmitted to the second train compartment through the first convex lens and the first polarizer in sequence;

[0018] Wherein, the LED emitting light source is located at the focus of the first convex lens.

[0019] In one embodiment, the first polarizer comprises:

[0020] A circular polarizer, used to convert the optical signal into circularly polarized light;

[0021] A first linear polarizer is used to set the polarization direction of the circularly polarized light to a first preset angle.

[0022] In one embodiment, the data receiving module includes a photosensitive element, a second convex lens and a second polarizer;

[0023] The optical signal sent by the second train car is transmitted to the photosensitive element through the second polarizer and the second convex lens; the photosensitive element is used to convert the optical signal received from the second train car into an analog electrical signal and send it to the analog-to-digital conversion module.

[0024] In one embodiment, the second polarizer is a second linear polarizer, which is used to set the polarization direction of the received optical signal to a second preset angle.

[0025] The present application also provides a train-to-train contactless data transmission system, comprising:

[0026] A first inter-train contactless data transmission device, disposed on a first coupler connector of a first train compartment;

[0027] A second inter-train contactless data transmission device, disposed on a second coupler connector of a second train carriage;

[0028] wherein the first train carriage is connected to the second train carriage via the first coupler connector and the second coupler connector;

[0029] The first train-to-train contactless data transmission device and the second train-to-train contactless data transmission device use any one of the train-to-train contactless data transmission devices provided in the present application; and the data receiving module of the first train-to-train contactless data transmission device receives the optical signal sent by the data sending module of the second train-to-train contactless data transmission device; the data receiving module of the second train-to-train contactless data transmission device receives the optical signal sent by the data sending module of the first train-to-train contactless data transmission device.

[0030] The present application also provides a method for non-contact data transmission between trains, which is applied to the non-contact data transmission system between trains provided by the present application, and the method includes:

[0031] The processor of the first inter-train contactless data transmission device receives the transmission data transmitted by the Ethernet link of the first train compartment through the data interface;

[0032] The processor of the first inter-train contactless data transmission device performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data;

[0033] The data sending module of the first inter-train contactless data transmission device converts the electrical signal corresponding to the transmission data into an optical signal corresponding to the transmission data, and sends the optical signal corresponding to the transmission data to the data receiving module of the second inter-train contactless data transmission device;

[0034] The data receiving module of the second inter-train contactless data transmission device converts the received optical signal into an electrical signal corresponding to the received data, and transmits the electrical signal corresponding to the received data to the processor of the second inter-train contactless data transmission device;

[0035] The processor of the second train-to-train contactless data transmission device performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the second train compartment through the data interface.

[0036] The present application also provides a method for non-contact data transmission between trains, which is implemented by any non-contact data transmission device between trains provided by the present application, and the method includes:

[0037] A processor of the inter-train contactless data transmission device disposed on the first train carriage receives the transmission data transmitted by the Ethernet link of the first train carriage through the data interface;

[0038] The processor performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data;

[0039] The data sending module converts the electrical signal corresponding to the sending data into an optical signal corresponding to the sending data, and sends the optical signal corresponding to the sending data to an optical signal receiving module, which is arranged on a second train car connected to the first train car.

[0040] In one embodiment, the method for non-contact data transmission between trains further includes:

[0041] The data receiving module of the inter-train contactless data transmission device receives the optical signal sent by the second train carriage, and converts the received optical signal into an electrical signal corresponding to the received data;

[0042] The processor performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the first train compartment through the data interface.

[0043] The inter-train contactless data transmission device, system and method of the present application are suitable for high-speed communication transmission requirements, meet the use requirements of train scenarios, and have the advantages of no wear, shock resistance, no electromagnetic wave leakage and high reliability. The present invention uses optical transmission between trains, and can complete the information transmission between trains without relying on physical medium connection, which fundamentally solves the limitations of traditional connection methods due to physical connection and helps to improve the communication rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1A It is a common train coupler electrical connector.

[0046] Figure 1B This is a common diagram of train coupler electrical connections.

[0047] Figure 2 This is a schematic diagram of a non-contact connection device between trains of the present application.

[0048] Figure 3 It is a structural schematic diagram of the optical signal transmission module.

[0049] Figure 4A Figure 1 is a schematic diagram of an M12-X connector.

[0050] FIG. 4B to FIG. 4C This is the pin connection table for the M12-X connector.

[0051] Figure 5A Figure 1 is a schematic diagram of an M12-A connector.

[0052] Figure 5B This is the pin connection table for the M12-A connector.

[0053] Figure 6 A schematic diagram of the processor structure.

[0054] Figure 7 It is a structural diagram of a data sending module and a data receiving module.

[0055] Figure 8 This is a structural diagram of the data sending module and the data receiving module from another angle. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] The present application provides a non-contact data transmission device between trains, such as Figure 2 and Figure 3 As shown, the device comprises:

[0058] The mounting bracket 1 is fixedly connected to the coupler connector of the first train compartment; the optical signal transmission module 2 is fixed on the mounting bracket 1 .

[0059] Specifically, the optical signal transmission module 2 is first fixed on the mounting bracket 1, and the mounting bracket 1 is fixed on the coupler connector of the first train compartment, so that the optical signal transmission module 2 can be fixed on the first train. Preferably, the optical signal transmission module 2 is installed inside the coupler connector housing and isolated from the outside.

[0060] The structure of the optical signal transmission module 2 is as follows: Figure 3As shown, the optical signal transmission module 2 includes:

[0061] A processor 21 is connected to the Ethernet link of the first train compartment through a data interface 25, and is used to convert the data sent and received by the first train compartment; wherein the data interface 25 can adopt an M12-X connector, Figure 4A The figure is a schematic diagram of the M12-X connector. When the data transmission rate is lower than 100Mbps, the M12-X connector completes the data transmission between the Ethernet link and the processor through the wire pair consisting of pins 1 and 2 and the wire pair consisting of pins 3 and 6, and uses the wire pair consisting of pins 4 and 5 and the wire pair consisting of pins 6 and 7 to power the optical signal transmission module, that is, the network cable power supply method. Among them, the wire pair consisting of pins 4 and 5 is the positive power supply, and the wire pair consisting of pins 6 and 7 is the negative power supply. Figure 4B Wiring diagram of the M12-X connector when powering the network cable.

[0062] a data transmission module 22, connected to the processor 21, for converting the electrical signal output by the processor 21 into an optical signal and transmitting the optical signal to a second train car, the second train car being connected to the first train car via the coupler connector;

[0063] a data receiving module 23, connected to the processor 21, for receiving an optical signal from the second train compartment, converting the received optical signal into an electrical signal and sending the electrical signal to the processor 21; and

[0064] A power module 24 includes a power interface M12-A connector, the M12-A connector is connected to an external independent power supply, and the input voltage is DC24V or DC110V. Figure 5A Schematic diagram of M12-A connector. When the data transmission rate reaches 1000Mbps, the optical signal transmission module is powered by an independent power supply through the M12-A connector. It can be seen that the optical signal transmission module 2 can flexibly select the power supply mode according to the data transmission rate. Figure 5B This is a wiring diagram of the M12-A connector. At this time, the M12-X connector is only used for data transmission. Figure 4C Wiring diagram of the M12-X connector when supplying power to an independent power supply.

[0065] In this embodiment, light is used as the transmission medium for data transmission between trains. Compared with various wireless transmission methods using radio frequency bands, this can effectively solve the problem of information leakage caused by electromagnetic wave leakage, making it impossible for information to be eavesdropped and interfered with, thereby improving security.

[0066] In one embodiment, if Figure 6 As shown, the processor 21 includes:

[0067] An analog-to-digital conversion module 211 for converting an analog electrical signal into a digital electrical signal;

[0068] A digital-to-analog conversion module 212 for converting a digital electrical signal into an analog electrical signal;

[0069] A serial / parallel conversion interface 213 for converting parallel signals into serial signals; and

[0070] Other data processing circuits 214, such as filter circuits, amplifier circuits, and other data processing circuits commonly used in the prior art.

[0071] Specifically, the processor 21 receives the electrical signal of the train Ethernet link (Ethernet Rx line), and converts the parallel signal into a serial signal through the serial / parallel conversion interface 213. The serial signal at this time is a digital electrical signal; then the digital electrical signal is converted into an analog electrical signal through the digital-to-analog conversion module 212, and the analog electrical signal is encoded and sent to the data sending module 22.

[0072] Similarly, the processor 21 receives an analog electrical signal from the data receiving module 23 (the analog electrical signal is obtained by converting the received optical signal by the data receiving module 23), and converts the analog electrical signal into a digital electrical signal through the analog-to-digital conversion module 211. The digital electrical signal at this time is a serial signal, and then the serial signal is converted into a parallel signal through the serial / parallel conversion interface 213 and decoded and sent to the Ethernet link (Ethernet Tx line).

[0073] In one embodiment, if Figure 7 As shown, the data sending module 22 includes an LED light source 221, a first convex lens 222 and a first polarizer, wherein the first polarizer includes a circular polarizer 223 and a first linear polarizer 224;

[0074] Specifically, the LED light source 221 is connected to the digital-to-analog conversion module 212 of the processor 21, and is driven by the signal of the processor 21 to emit a light source that flashes on and off, so as to convert the analog electrical signal output by the digital-to-analog conversion module 212 into a corresponding optical signal; the optical signal is sequentially transmitted to the second train compartment through the first convex lens 222, the circular polarizer 223 and the first linear polarizer 224;

[0075] Among them, the LED emitting light source 221 is located at the focus of the first convex lens 222, so that the first convex lens 222 converts the light emitted by the LED emitting light source 221 into parallel light, and converts the point light source into a surface light source, so as to further expand the illumination range of the light signal, thereby reducing the alignment accuracy requirement between the data sending module 22 and the data receiving module arranged on the second train car.

[0076] The circular polarizer 223 converts the optical signal into circularly polarized light and transmits the circularly polarized light to the first linear polarizer 224 . The first linear polarizer 224 sets the polarization direction of the circularly polarized light to a first preset angle.

[0077] In one embodiment, if Figure 7 As shown, the data receiving module 23 includes a photosensitive element 231 , a second convex lens 232 and a second polarizer, wherein the photosensitive element 231 includes but is not limited to semiconductor photosensitive elements such as photodiodes and CCDs (Charge Coupled Devices); the second polarizer is a second linear polarizer 233 .

[0078] Specifically, the optical signal sent by the second train car is transmitted to the photosensitive element 231 through the second linear polarizer 233 and the second convex lens 232; the photosensitive element is used to convert the optical signal received from the second train car into an analog electrical signal and send it to the analog-to-digital conversion module 211.

[0079] The second linear polarizer 233 sets the polarization direction of the received optical signal to a second preset angle. The second preset angle differs by 90° from the first preset angle corresponding to the first linear polarizer 224, so that the polarization directions of the optical signal emitted by the optical signal transmission module 2 and the received optical signal differ by 90°, which can effectively solve the problem of signal interference caused by the leakage of the optical signal to the adjacent optical path and improve the data transmission quality.

[0080] The photosensitive element 231 is located at a focus of the second convex lens 232. The second convex lens 232 is used to restore the linearly polarized light transmitted by the second linear polarizer 233 to a point light source, effectively improving the light intensity and signal-to-noise ratio, thereby ensuring the stability of the received optical signal.

[0081] It can be seen from the above embodiments that the contactless data transmission device between trains of the present application uses light as the transmission medium, the data transmission is stable, does not rely on physical contact for data transmission, and will not cause loose connection and network interruption in a vibration environment; it has good confidentiality, data transmission works in a sealed environment and uses modulated optical signals for transmission. Compared with traditional radio transmission methods, there is no data leakage problem; it has strong anti-interference ability, the data signal does not work in the radio frequency band and is not affected by external radio; the outer casing has a good sealing effect and can be used in dusty working environments; it supports dual-mode power supply and adopts network cable power supply, which effectively reduces the deployment requirements and is easy to integrate into the coupler installation structure, and can be used in narrow EMU and locomotive environments.

[0082] The present application also provides a non-contact data transmission system between trains, see Figure 2 , Figure 7and Figure 8 , the system comprises:

[0083] A first inter-train contactless data transmission device, comprising a first mounting bracket 1 and a first optical signal transmission module 2, wherein the first inter-train contactless data transmission device is arranged on a first coupler connector of a first train compartment;

[0084] A second inter-train contactless data transmission device, comprising a second mounting bracket 1' and a second optical signal transmission module 2', wherein the second inter-train contactless data transmission device is arranged on a second coupler connector of a second train compartment;

[0085] wherein the first train carriage is connected to the second train carriage via the first coupler connector and the second coupler connector;

[0086] The first train-to-train contactless data transmission device and the second train-to-train contactless data transmission device use any one of the train-to-train contactless data transmission devices provided in the present application; and the data receiving module 23 of the first train-to-train contactless data transmission device receives the optical signal sent by the data sending module 22' of the second train-to-train contactless data transmission device; the data receiving module 23' of the second train-to-train contactless data transmission device receives the optical signal sent by the data sending module 22 of the first train-to-train contactless data transmission device.

[0087] The inter-train contactless data transmission system in this embodiment uses light as a medium to complete inter-train data transmission, and has the following advantages over the general visible light communication system:

[0088] 1) Stable two-way communication is achieved. In the limited space of the coupler between trains, the uplink and downlink optical paths are designed and fixed in a stable installation structure, ensuring the direct path relationship between the optical transmitter and the receiver without the possibility of obstruction.

[0089] 2) The distance between the coupler and the module inside the coupler is less than 1m, which belongs to short-distance transmission, and the transmission can be completed using a smaller light source power.

[0090] 3) It works in a limited installation space, isolating the interference of the external environment on the optical receiver. It effectively avoids the phenomenon of oversaturation of the photoelectric conversion device caused by excessive non-information light source.

[0091] The present application also provides a method for non-contact data transmission between trains, which is applied to the non-contact data transmission system between trains provided in the present application. Figure 2 , Figure 7 and Figure 8 , the method comprising:

[0092] The processor 21 of the first inter-train contactless data transmission device receives the transmission data transmitted by the Ethernet link of the first train compartment through the data interface 25;

[0093] The processor 21 of the first train-to-train contactless data transmission device performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data;

[0094] The data sending module 22 of the first inter-train contactless data transmission device converts the electrical signal corresponding to the transmission data into an optical signal corresponding to the transmission data, and sends the optical signal corresponding to the transmission data to the data receiving module 23' of the second inter-train contactless data transmission device;

[0095] The data receiving module 23' of the second inter-train contactless data transmission device converts the received optical signal into an electrical signal corresponding to the received data, and transmits the electrical signal corresponding to the received data to the processor 21' of the second inter-train contactless data transmission device;

[0096] The processor 21 ' of the second inter-train contactless data transmission device performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the second train compartment through the data interface 25 '.

[0097] The present application also provides a method for non-contact data transmission between trains, which is implemented by any non-contact data transmission device between trains provided in the present application. Figure 2 , Figure 7 and Figure 8 , the method comprising:

[0098] The processor 21 of the inter-train contactless data transmission device disposed on the first train carriage receives the transmission data transmitted by the Ethernet link of the first train carriage through the data interface 25;

[0099] The processor 21 performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data;

[0100] The data sending module 22 converts the electrical signal corresponding to the sending data into an optical signal corresponding to the sending data, and sends the optical signal corresponding to the sending data to an optical signal receiving module, which is arranged on a second train car connected to the first train car.

[0101] The optical signal receiving module may be a data receiving module of any train-to-train contactless data transmission device provided in the present application, or may be any module in the prior art that can realize optical signal reception.

[0102] In one embodiment, the method for non-contact data transmission between trains further includes:

[0103] The data receiving module 23 of the non-contact data transmission device between trains receives the optical signal sent by the second train car, and converts the received optical signal into an electrical signal corresponding to the received data; wherein, the second train car sends the optical signal through an optical signal sending module, and the optical signal sending module can be the data sending module of any non-contact data transmission device between trains provided in the present application, or it can be any module in the prior art that can realize optical signal sending.

[0104] The processor 21 performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the first train compartment through the data interface 25 .

[0105] The inter-train contactless data transmission device, system and method of the present application are suitable for high-speed communication transmission requirements, meet the use requirements of train scenarios, and have the advantages of no wear, shock resistance, no electromagnetic wave leakage and high reliability. The present invention uses optical transmission between trains, and can complete the information transmission between trains without relying on physical medium connection, which fundamentally solves the limitations of traditional connection methods due to physical connection and helps to improve the communication rate.

[0106] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of this specification.

[0107] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other. The above is only an embodiment of the embodiment of this specification and is not intended to limit the embodiment of this specification. For those skilled in the art, the embodiment of this specification may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiment of this specification shall be included in the scope of the claims of the embodiment of this specification.

Claims

1. A non-contact data transmission device between trains, characterized in that: include: A mounting bracket fixedly connected to a coupler connector of the first train carriage; The optical signal transmission module is fixed on the mounting bracket and includes: a processor connected to the Ethernet link of the first train car via a data interface, and configured to perform data conversion on data sent and received by the first train car; a data transmission module connected to the processor, configured to convert the electrical signal output by the processor into an optical signal and transmit the optical signal to a second train car, the second train car being connected to the first train car via the coupler connector; a data receiving module, connected to the processor, for receiving an optical signal from the second train carriage, and converting the received optical signal into an electrical signal and sending the electrical signal to the processor; The processor includes: an analog-to-digital conversion module for converting an analog electrical signal into a digital electrical signal; and a digital-to-analog conversion module for converting a digital electrical signal into an analog electrical signal; The data sending module includes an LED emitting light source, a first convex lens and a first polarizer; The LED light source is connected to the digital-to-analog conversion module and is used to convert the analog electrical signal output by the digital-to-analog conversion module into a corresponding optical signal; the optical signal is transmitted to the second train compartment through the first convex lens and the first polarizer in sequence; Wherein, the LED emitting light source is located at the focus of the first convex lens.

2. The train-to-train contactless data transmission device according to claim 1, characterized in that: The first polarizer comprises: A circular polarizer, used to convert the optical signal into circularly polarized light; A first linear polarizer is used to set the polarization direction of the circularly polarized light to a first preset angle.

3. The train-to-train contactless data transmission device according to claim 2, characterized in that: The data receiving module includes a photosensitive element, a second convex lens and a second polarizer; The optical signal sent by the second train car is transmitted to the photosensitive element through the second polarizer and the second convex lens; the photosensitive element is used to convert the optical signal received from the second train car into an analog electrical signal and send it to the analog-to-digital conversion module.

4. The train-to-train contactless data transmission device according to claim 3, characterized in that: The second polarizer is a second linear polarizer, which is used to set the polarization direction of the received optical signal to a second preset angle.

5. The train-to-train contactless data transmission device according to claim 4, characterized in that: The first preset angle differs from the second preset angle by 90°.

6. The train-to-train contactless data transmission device according to claim 3, characterized in that: The photosensitive element is a photodiode or a CCD.

7. The train-to-train contactless data transmission device according to claim 1, characterized in that: It also includes a power interface, which is an M12-A interface.

8. The train-to-train contactless data transmission device according to claim 1, characterized in that: It also includes a power interface, which is an M12-X interface.

9. A non-contact data transmission system between trains, characterized in that: include: A first inter-train contactless data transmission device, disposed on a first coupler connector of a first train compartment; A second inter-train contactless data transmission device, disposed on a second coupler connector of a second train carriage; wherein the first train carriage is connected to the second train carriage via the first coupler connector and the second coupler connector; The first train-to-train contactless data transmission device and the second train-to-train contactless data transmission device use the train-to-train contactless data transmission device described in any one of claims 1-8; and the data receiving module of the first train-to-train contactless data transmission device receives the optical signal sent by the data sending module of the second train-to-train contactless data transmission device; the data receiving module of the second train-to-train contactless data transmission device receives the optical signal sent by the data sending module of the first train-to-train contactless data transmission device.

10. A method for non-contact data transmission between trains, characterized in that: The method is implemented by using the train-to-train contactless data transmission system according to claim 9, comprising: The processor of the first inter-train contactless data transmission device receives the transmission data transmitted by the Ethernet link of the first train compartment through the data interface; The processor of the first inter-train contactless data transmission device performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data; The data sending module of the first inter-train contactless data transmission device converts the electrical signal corresponding to the transmission data into an optical signal corresponding to the transmission data, and sends the optical signal corresponding to the transmission data to the data receiving module of the second inter-train contactless data transmission device; The data receiving module of the second inter-train contactless data transmission device converts the received optical signal into an electrical signal corresponding to the received data, and transmits the electrical signal corresponding to the received data to the processor of the second inter-train contactless data transmission device; The processor of the second train-to-train contactless data transmission device performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the second train compartment through the data interface.

11. A method for non-contact data transmission between trains, characterized in that: The train-to-train contactless data transmission device according to claim 1 is implemented, comprising: A processor of the inter-train contactless data transmission device disposed on the first train carriage receives the transmission data transmitted by the Ethernet link of the first train carriage through the data interface; The processor performs data conversion on the transmission data to obtain an electrical signal corresponding to the transmission data; The data sending module converts the electrical signal corresponding to the sending data into an optical signal corresponding to the sending data, and sends the optical signal corresponding to the sending data to an optical signal receiving module, which is arranged on a second train car connected to the first train car.

12. The method for non-contact data transmission between trains according to claim 11, characterized in that: Also includes: The data receiving module of the inter-train contactless data transmission device receives the optical signal sent by the second train carriage, and converts the received optical signal into an electrical signal corresponding to the received data; The processor performs data conversion on the electrical signal corresponding to the received data to obtain the received data, and sends the received data to the Ethernet link of the first train compartment through the data interface.

Images