Railway vehicle electrical connection device and control method

Abstract

This application relates to an electrical connection device and control method for rail vehicles. The electrical connection device includes: a coupler laser lens disposed on the end face of the electric coupler; a photoelectric conversion module communicatively connected to the coupler laser lens and, via the coupler laser lens, communicatively connected to a photoelectric conversion module of a vehicle to be connected; the photoelectric conversion module controls the coupler laser lens to perform laser communication, receiving and transmitting light signals and converting light signals to electrical signals; and a data conversion module communicatively connected to the photoelectric conversion module and the vehicle-end connector of the rail vehicle, receiving and transmitting rail vehicle electrical signals via the vehicle-end connector. The photoelectric conversion module is integrated into the data conversion module. This application solves the problems of poor contact or broken electrical connection pins in the application of electric couplers, improving the stability of signal transmission.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, and in particular to electrical connection devices and control methods for rail vehicles. Background Technology

[0002] A coupler is a hook at both ends of a train car or locomotive, serving to connect, pull, and buffer. A coupler buffer device is a vehicle component used to connect vehicles, locomotives, or motor cars, transmitting traction and braking forces while mitigating longitudinal impact forces. It achieves both mechanical and electrical connections between vehicles.

[0003] Most current coupler buffer systems use electrical connectors, such as patent CN210607927U, which primarily achieves electrical signal transmission between vehicles through 30 pairs of connectors. Figure 1 As shown. However, in actual use, due to vibration and other reasons, electrical connectors often experience poor contact, or even breakage of the electrical connector pin 31 or the coupler electrical connection pin (not shown in the figure), which seriously affects train operation. In addition, existing electrical connections require alignment or fixation through a connecting device to achieve docking, which increases the cost of the device.

[0004] Currently, no effective solution has been proposed for how to solve the problems of electric couplers in the coupler buffer system in related technologies and achieve stable transmission of vehicle signals. Summary of the Invention

[0005] This application provides an electrical connection device and control method for rail vehicles, which uses laser communication for electrical connection to solve faults such as poor contact or broken electrical connection pins in the application of electric couplers, and improves the stability of signal transmission.

[0006] In a first aspect, embodiments of this application provide an electrical connection device for a rail vehicle, applied to a coupler buffer device of a rail vehicle, comprising:

[0007] A laser lens for the coupler is installed on the end face of the electric coupler.

[0008] The photoelectric conversion module is communicatively connected to the coupler laser lens and, through the coupler laser lens, to a photoelectric conversion module of a vehicle to be connected. The photoelectric conversion module controls the coupler laser lens to perform laser communication, receive and transmit light signals, and convert the light signals into electrical signals. Specifically, the coupler laser lens includes at least a transmitting laser lens and a receiving laser lens. The laser lens employs a focusing lens structure to increase the field of view for receiving and transmitting light signals. The photoelectric conversion module connects the transmitting and receiving laser lenses via fiber optic cables. Therefore, the photoelectric conversion module and data conversion module can be installed inside the rail vehicle, rather than on the coupler itself, to provide a good working environment and avoid the impact of external high temperature and high humidity on product lifespan.

[0009] The data conversion module is communicatively connected to the photoelectric conversion module and the vehicle-end connector of the rail vehicle. It transmits and receives rail vehicle electrical signals through the vehicle-end connector. The photoelectric conversion module is integrated into the data conversion module.

[0010] Existing electrical connection methods use large-volume electrical connectors, which are difficult to install. However, based on the above structure, this application only requires a small space to install the coupler laser lens to achieve signal communication, effectively reducing the complexity and cost of the coupler buffer device.

[0011] In some embodiments, the data conversion module further includes:

[0012] The CPU processing module is electrically connected to the photoelectric conversion module;

[0013] The signal processing module is electrically connected to the CPU processing module and the vehicle-end connector. The CPU processing module receives the electrical signal from the vehicle-end connector through the signal processing module, processes it, and then outputs an optical communication signal through the photoelectric conversion module and the coupler laser lens. It also receives the electrical signal converted and output by the coupler laser lens and the photoelectric conversion module and outputs it to the vehicle-end connector through the signal processing module.

[0014] The electrical signals of the vehicle-end connector mainly include: digital input signals, digital output signals, Ethernet signals, digital-to-analog conversion signals, analog-to-digital conversion signals, WTB (Wire Train Bus) bus signals, and RS485 bus signals. Correspondingly, the signal processing module includes at least: a digital processing module, an Ethernet communication module, an analog-to-digital / digital-to-analog processing module, a WTB bus processing module, and an RS485 bus processing module.

[0015] Based on the above structure, the embodiments of this application transmit and process the electrical signals of the vehicle-end connector through the data conversion module and convert them into optical signals through the photoelectric conversion module, and / or convert the received optical signals into electrical signals through the photoelectric conversion module and then process and transmit them to the vehicle-end connector, thereby realizing optical communication transmission of the electrical connection of the coupler.

[0016] In some embodiments, the photoelectric conversion module further includes: a laser emitting circuit and a laser receiving circuit;

[0017] The laser emitting circuit includes at least a laser, a matching circuit, and a driving circuit. The matching circuit is electrically connected to the CPU processing module to receive electrical signals, and the driving circuit is electrically connected to the matching circuit and the laser.

[0018] The laser receiving circuit includes at least a detector, a preamplifier circuit, a main amplifier circuit, and a matching equalization circuit that are connected in sequence. The matching equalization circuit is electrically connected to the CPU processing module to output an electrical signal.

[0019] In some embodiments, the digital quantity processing module includes at least a digital quantity input module and a digital quantity output module;

[0020] The digital input module includes at least a DC signal acquisition circuit, a first optocoupler isolation circuit, and a first signal processing unit connected in sequence. The DC signal acquisition circuit is electrically connected to the vehicle-end connector, and the first signal processing unit is electrically connected to the CPU processing module. Specifically, the first signal processing unit and the CPU processing module communicate via an LVDS (Low-Voltage Differential Signaling) high-speed bus. The digital input signal is acquired by the DC signal acquisition circuit and the first optocoupler isolation circuit, converted into a digital level signal, processed by the first signal processing unit, and then transmitted to the CPU processing module via the LVDS high-speed bus. The DC signal acquisition circuit may include modules such as comparators, amplifier circuits, or filter circuits. The first optocoupler isolation circuit may be an optocoupler, a transformer-based digital isolator, or other isolation devices or circuits. The first signal processing unit is an LVDS converter used to convert the digital level signal into a balanced LVDS signal for transmission.

[0021] The digital output module includes at least a second signal processing unit, a second optocoupler isolation circuit, and a digital output circuit, which are electrically connected in sequence. The second signal processing unit is electrically connected to the CPU processing module, and the digital output circuit is electrically connected to the vehicle-end connector. Specifically, the second signal processing unit receives LVDS instructions output by the CPU processing module via the LVDS high-speed bus, converts them into LVDS level signals, and outputs them to the digital output circuit after optocoupler isolation. The digital output circuit converts the LVDS level signals into DC signals and outputs them to the vehicle-end connector.

[0022] In some embodiments, the Ethernet communication module is electrically connected to the vehicle-end connector and the CPU processing module to transmit Ethernet signals between the vehicle-end connector and the CPU processing module. The Ethernet communication module includes at least an Ethernet transformer and an Ethernet transceiver that are electrically connected. The Ethernet transformer is electrically connected to the vehicle-end connector, and the Ethernet transceiver is electrically connected to the CPU processing module. This enables the CPU processing module to convert the Ethernet data to be sent into an Ethernet signal and output it to the vehicle-end connector, and / or receive the Ethernet signal from the vehicle-end connector and convert it into an Ethernet receive signal and output it to the CPU processing module.

[0023] In some embodiments, the analog-to-digital / digital-to-analog processing module includes at least a first signal filtering unit and an analog-to-digital conversion unit electrically connected to each other, and a second signal filtering unit and a digital-to-analog conversion unit electrically connected to each other. Both the first and second signal filtering units are electrically connected to the vehicle-end connector, and both the analog-to-digital conversion unit and the digital-to-analog conversion unit are electrically connected to the CPU processing module. Specifically, in this application embodiment, the first and second signal filtering units receive or transmit UIC568 ​​analog signals. The analog-to-digital processing module converts the UIC568 ​​analog signals received by the first signal filtering unit into digital signals and outputs them to the CPU processing module. Alternatively, the digital-to-analog processing module converts the digital signals output by the CPU processing module back into UIC568 ​​analog signals. The specific circuit configuration is not specifically limited here; any converter capable of converting UIC568 ​​analog signals to digital signals should fall within the protection scope of this application embodiment.

[0024] In some embodiments, the WTB bus processing module includes at least a first transformer, a second transformer, and a signal transceiver. The first transformer and the second transformer are electrically connected to the vehicle-end connector, and the signal transceiver is electrically connected to the CPU processing module. Specifically, based on the above structure, the first transformer and the signal transceiver receive the WTB bus signal from the vehicle-end connector and convert it into a WTB receive signal, which is then output to the CPU processing module. And / or the signal transceiver and the second transformer receive the WTB transmit signal from the CPU processing module and convert it into a WTB bus signal, which is then output to the vehicle-end connector.

[0025] In some embodiments, the RS485 bus processing module is an isolated signal transceiver electrically connected to the vehicle connector and the CPU processing module to receive RS485 transmitted signals from the CPU processing module, convert them into RS485 bus signals, and output them to the vehicle connector, and / or receive RS485 bus signals from the vehicle connector, convert them into RS485 received signals, and output them to the CPU processing module.

[0026] In some embodiments, the CPU processing module is used to receive data from the digital quantity processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module, and after packaging and reassembling the data according to the corresponding protocol type, send it to the photoelectric conversion module, and / or receive electrical signals from the photoelectric conversion module, perform data protocol parsing, convert and output the data to the digital quantity processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module.

[0027] In addition, the CPU processing module based on the above structure also includes a power supply module and a module for system initialization, logic and fault handling, so as to coordinate the normal data conversion of the electrical connection device of the rail vehicle.

[0028] Secondly, embodiments of this application provide a method for controlling the electrical connection of a rail vehicle, comprising at least two train sets, each train set being equipped with the rail vehicle electrical connection device as described in the first aspect above, including:

[0029] The electrical connection startup procedure involves verifying and initializing the electrical connection device of the rail vehicle.

[0030] After successful verification and initialization of the master control information acquisition steps, the second rail vehicle electrical connection device acquires the master control information through the Ethernet communication module of the signal processing module and performs handshake communication based on the master control information to confirm that the data information acquired by the other party is correct.

[0031] In the electrical connection control steps, if the electrical connection device of the rail vehicle described in step two successfully establishes handshake communication, optical communication is performed through the coupler laser lens and photoelectric conversion module; otherwise, if the electrical connection start-up step and / or the main control information acquisition step fail, a fault handling mode is initiated.

[0032] In some embodiments, the fault handling mode specifically involves: reporting the current fault information to the train network system via the Ethernet communication module, cutting off the optical communication of the second rail vehicle electrical connection device, and closing the input / output channels.

[0033] Compared with related technologies, the rail vehicle electrical connection device and its control method provided in this application adopt a brand-new non-contact optical communication method for signal transmission, which avoids the situation of poor contact of electrical connectors or breakage of electrical connector pins caused by vibration and other reasons, improves the stability of train operation, adopts a digital problem-solving approach, improves the digitalization and intelligence of the coupler buffer system, and accelerates technological innovation.

[0034] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 It is a structural diagram of an electrical connection device based on relevant technologies;

[0037] Figure 2 This is a schematic diagram of the structure of the connected electrical connection device according to an embodiment of this application;

[0038] Figure 3 This is a schematic diagram of the structure of the data conversion module according to an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of a laser emitting circuit according to an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the structure of a laser receiving circuit according to an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of the structure of a digital quantity processing module according to an embodiment of this application;

[0042] Figure 7 This is a schematic diagram of the structure of an Ethernet communication module according to an embodiment of this application;

[0043] Figure 8 This is a schematic diagram of the structure of the analog-to-digital / digital-to-analog processing module according to an embodiment of this application;

[0044] Figure 9 This is a schematic diagram of the structure of the WTB bus processing module according to an embodiment of this application;

[0045] Figure 10 This is a schematic diagram of the structure of an RS485 bus processing module according to an embodiment of this application;

[0046] Figure 11 This is a flowchart illustrating the control method according to an embodiment of this application.

[0047] Figure 1 In the middle: 30, electrical connector; 31, electrical connector pin;

[0048] Figures 2 to 10 middle:

[0049] 1. Coupler laser lens; 2. Photoelectric conversion module; 3. Data conversion module; 4. Vehicle end connector;

[0050] 31. CPU processing module; 32. Signal processing module. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0052] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0053] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0054] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0055] Train coupler buffer systems are generally used when two train sets are coupled. During coupling, the train network system needs to be reconnected, and it is necessary to determine which train set is the master control train set during train operation. Most of the digital input and output signal points of the car-end connectors are either input points when the train set is the master control train set, or output points when the train set is a non-master control train set.

[0056] This embodiment also provides an electrical connection device for a rail vehicle, applied to a rail vehicle coupler and buffer device. As used below, the terms "module," "unit," "subunit," etc., can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in hardware, implementation in software, or a combination of software and hardware, is also possible and contemplated.

[0057] Figure 2 This is a structural block diagram of an electrical connection device according to an embodiment of this application, such as... Figure 2 As shown, the device includes: a coupler laser lens 1, a photoelectric conversion module 2, and a data conversion module 3. The coupler laser lens 1 is installed on the end face of the electric coupler and has been aligned and adjusted. Specifically, the coupler laser lens 1 includes at least a transmitting laser lens and a receiving laser lens. The laser lens adopts a focusing lens structure to increase the field of view of the received and transmitted light signals, thereby further improving the fault tolerance of communication transmission.

[0058] The photoelectric conversion module 2 is connected to the coupler laser lens 1 via communication, and is also connected to the photoelectric conversion module 2 of a vehicle to be connected via the coupler laser lens 1. The photoelectric conversion module 2 is used to control the coupler laser lens 1 to perform laser communication, receive and transmit light signals, and convert light signals into electrical signals. The photoelectric conversion module 2 is connected to the transmitting and receiving laser lenses via fiber optic cables. Based on this, the photoelectric conversion module 2 and the data conversion module can be installed inside the rail vehicle, without having to be installed on the coupler body, so as to provide a good working environment and avoid the impact of external high temperature and high humidity environment on the product life.

[0059] The data conversion module 3 is connected to the photoelectric conversion module 2 and the vehicle-end connector 4 of the rail vehicle. It receives and transmits rail vehicle electrical signals through the vehicle-end connector 4. The photoelectric conversion module 2 is integrated into the data conversion module 3.

[0060] Existing electrical connection methods use large-volume electrical connectors, which are difficult to install. However, based on the above structure, this application only requires a small space to install the coupler laser lens 1 to achieve signal communication, effectively reducing the complexity and cost of the coupler buffer device.

[0061] For details, please refer to Figure 3 As shown, the data conversion module 3 further includes a CPU processing module 31 and a signal processing module 32. The CPU processing module 31 is electrically connected to the photoelectric conversion module 2; the signal processing module 32 is electrically connected to the CPU processing module 31 and the vehicle-end connector 4. The CPU processing module 31 receives the electrical signals from the vehicle-end connector 4, processes them, and then outputs optical communication signals through the photoelectric conversion module 2 and the coupler laser lens 1, and / or receives the electrical signals converted and output by the coupler laser lens 1 and the photoelectric conversion module 2, and then outputs them to the vehicle-end connector 4 through the signal processing module 32. The electrical signals of the vehicle-end connector 4 mainly include: digital input signals, digital output signals, Ethernet signals, digital-to-analog conversion signals, analog-to-digital conversion signals, WTB bus signals, and RS485 bus signals. Correspondingly, the signal processing module 32 includes at least: a digital processing module, an Ethernet communication module, an analog-to-digital / digital-to-analog processing module, a WTB bus processing module, and an RS485 bus processing module.

[0062] In some embodiments, the CPU processing module 31 is used to receive data from the digital signal processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module, and after repackaging and reassembling the data according to the corresponding protocol type, send it to the photoelectric conversion module 2, and / or receive electrical signals from the photoelectric conversion module 2, perform data protocol parsing, and convert and output the data to the digital signal processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module. The aforementioned protocol types include, but are not limited to: Ethernet communication protocol, WTB communication protocol, RS485 communication protocol, and data encoding and parsing protocol.

[0063] Although not shown, the CPU processing module 31 based on the above structure also includes a power supply module and a module for system initialization, logic and fault handling to coordinate the normal data conversion of the electrical connection device of the rail vehicle, which will not be described in detail here.

[0064] refer to Figures 4-5 As shown, the photoelectric conversion module 2 further includes: a laser emitting circuit and a laser receiving circuit. The laser emitting circuit includes at least: a laser, a matching circuit, and a driving circuit. The matching circuit is electrically connected to the CPU processing module 31 to receive electrical signals and output them to the driving circuit. The driving circuit is electrically connected to the matching circuit and the laser. The matching circuit is an auxiliary circuit of the driving circuit and is used to achieve matching between the CPU processing module 31 and the laser. Specifically, it matches the signal transmission between the laser and the driving circuit, as well as between the driving circuit and the electrical signal interface, to reduce signal interference and noise, thereby controlling phenomena affecting the signal path such as overshoot, undershoot, ringing, waveform distortion, and jitter, ensuring the normal operation of the laser. The matching circuit can be adaptively configured according to the existing circuit structure. The driving circuit is the core circuit of the laser emitting circuit. It is mainly used to provide current for the laser to operate, drive the laser to emit light, and realize the electro-optical conversion of communication data. The driving circuit can be a laser diode controller or other types of driving circuits. The protection circuit is a peripheral circuit of the drive circuit. Its main purpose is to automatically shut down the laser in case of abnormal laser operation, preventing damage to the device or personal injury to the user. The laser is the core component of the high-speed optical module's transmitting section; it provides the light source for optical module communication, and its performance determines the performance of the entire optical transceiver system. The main working principle of the laser is to convert the user's electrical signal into an optical signal containing communication information under the action of the drive circuit.

[0065] The laser receiving circuit includes at least a detector, a preamplifier circuit, a main amplifier circuit, and a matching equalizer circuit connected in sequence. The matching equalizer circuit is electrically connected to the CPU processing module 31 to output an electrical signal. The detector receives the optical communication signal and converts it into an electrical signal, which is then output to the CPU processing module 31 via the preamplifier circuit, main amplifier circuit, and matching equalizer circuit. The preamplifier circuit and main amplifier circuit can be adaptively configured according to the pulse width of the detector. The preamplifier circuit detects the weak electrical signal generated by the detector and amplifies it with low gain. The subsequent main amplifier circuit amplifies the signal amplified by the preamplifier circuit with a larger gain. The two circuits form a high-efficiency amplifier circuit to achieve distortion-free detection of small signals and appropriate gain amplification of weak signals, while effectively suppressing noise and interference. The aforementioned detector can be a high-speed photodetector to provide optical detection for optical module communication. The matching equalization circuit is an auxiliary circuit of the aforementioned two amplifier circuits. It is used to match the signal transmission between the detector and each stage of the amplifier circuit as well as the electrical signal interface, so as to reduce signal interference, reduce signal noise, control possible inter-symbol interference, etc., thereby controlling the occurrence of phenomena that affect the transmission quality such as overshoot, undershoot, ringing, waveform distortion, jitter in the signal path, and ensuring the normal operation of the optical module.

[0066] The driving circuit and the main amplification circuit are also equipped with protection circuits, which are mainly used to control the working state of the receiving section in case of abnormal optical power received by the optical module, prevent device damage, and provide no-light alarm signals. Both the laser emitting circuit and the laser receiving circuit are equipped with power supply modules to provide energy. The power supply modules mainly include power conversion, filtering, and shaping. This application does not specifically limit the specific circuit configuration of the relevant circuits; the corresponding configurations can be flexibly adjusted and selected. Preferably, the photoelectric conversion module 2 in this embodiment is an SFP (Small Form Pluggable) optical module or an SFF (Small Form Factor) optical module.

[0067] refer to Figure 6As shown, the digital signal processing module includes at least a digital input module and a digital output module. The digital input module includes at least a DC signal acquisition circuit, a first optocoupler isolation circuit, and a first signal processing unit connected in sequence. The DC signal acquisition circuit is electrically connected to the vehicle-end connector 4, and the first signal processing unit is electrically connected to the CPU processing module 31. Specifically, the first signal processing unit and the CPU processing module 31 communicate via an LVDS high-speed bus. The digital input signal is acquired by the DC signal acquisition circuit and the first optocoupler isolation circuit, converted into a digital level signal, processed by the first signal processing unit, and then transmitted to the CPU processing module 31 via the LVDS high-speed bus. The DC signal acquisition circuit may include modules such as comparators, amplifier circuits, or filter circuits. The first optocoupler isolation circuit may be an optocoupler, a transformer-based digital isolator, or other isolation devices or circuits. The first signal processing unit is an LVDS converter used to convert the digital level signal into a balanced LVDS signal for transmission.

[0068] The digital output module includes at least a second signal processing unit, a second optocoupler isolation circuit, and a digital output circuit, which are electrically connected in sequence. The second signal processing unit is electrically connected to the CPU processing module 31, and the digital output circuit is electrically connected to the vehicle-end connector 4. Specifically, the second signal processing unit receives the LVDS instruction output by the CPU processing module 31 via the LVDS high-speed bus, converts it into an LVDS level signal, and outputs it to the digital output circuit after optocoupler isolation. The digital output circuit converts the LVDS level signal into a DC signal and outputs it to the vehicle-end connector 4. In this embodiment, the first signal processing unit, the second signal processing unit, the first optocoupler isolation circuit, and the second optocoupler isolation circuit may use the same or different circuit structures, or they may use a reversible integrated circuit structure; no specific limitation is made here.

[0069] refer to Figure 7As shown, the Ethernet communication module is electrically connected to the vehicle-end connector 4 and the CPU processing module 31 to transmit Ethernet signals between the vehicle-end connector 4 and the CPU processing module 31. The Ethernet communication module includes at least an Ethernet transformer and an Ethernet transceiver that are electrically connected. The Ethernet transformer is electrically connected to the vehicle-end connector 4, and the Ethernet transceiver is electrically connected to the CPU processing module 31. This enables the CPU processing module 31 to convert the Ethernet data to be sent into an Ethernet signal and output it to the vehicle-end connector 4, and / or to receive the Ethernet signal from the vehicle-end connector 4 and convert it into an Ethernet received signal and output it to the CPU processing module 31. The Ethernet transformer, also known as a network isolation transformer or network filter, is used to achieve signal transmission, impedance matching, waveform repair, signal noise suppression, and high-voltage isolation. The Ethernet transceiver is a bidirectional transparent converter that converts Ethernet data signals into fiber optic data signals. The specific models of the Ethernet transformer and the Ethernet transceiver are not limited here.

[0070] refer to Figure 8 As shown, the analog-to-digital / digital-to-analog processing module includes at least a first signal filtering unit and an analog-to-digital conversion unit electrically connected to each other, and a second signal filtering unit and a digital-to-analog conversion unit electrically connected to each other. Both the first and second signal filtering units are electrically connected to the vehicle-end connector 4, and both the analog-to-digital conversion unit and the digital-to-analog conversion unit are electrically connected to the CPU processing module 31. Specifically, in this embodiment, the first and second signal filtering units receive or transmit UIC568 ​​analog signals. The analog-to-digital processing module converts the UIC568 ​​analog signals received by the first signal filtering unit into digital signals and outputs them to the CPU processing module 31. Alternatively, the digital signals output by the CPU processing module 31 are converted back into UIC568 ​​analog signals by the digital-to-analog processing module. The specific circuit configuration is not specifically limited here; any converter capable of converting UIC568 ​​analog signals to digital signals should fall within the protection scope of this embodiment.

[0071] refer to Figure 9 As shown, the WTB bus processing module includes at least a first transformer, a second transformer, and a signal transceiver. The first transformer and the second transformer are electrically connected to the vehicle-end connector 4, and the signal transceiver is electrically connected to the CPU processing module 31. Specifically, based on the above structure, the first transformer and the signal transceiver receive the WTB bus signal from the vehicle-end connector 4 and convert it into a WTB receive signal, which is then output to the CPU processing module 31. Alternatively, the signal transceiver and the second transformer receive the WTB transmit signal from the CPU processing module 31 and convert it into a WTB bus signal, which is then output to the vehicle-end connector 4. In the figure, RX represents the data received by the CPU processing module 31, and TX represents the data sent by the CPU processing module 31.

[0072] refer to Figure 10As shown, the RS485 bus processing module is an isolated signal transceiver, electrically connected to the vehicle-end connector 4 and the CPU processing module 31, to receive the RS485 transmitted signal from the CPU processing module 31 and convert it into an RS485 bus signal and output it to the vehicle-end connector 4, and / or receive the RS485 bus signal from the vehicle-end connector 4 and convert it into an RS485 received signal and output it to the CPU processing module 31.

[0073] Based on the above structure, in this embodiment, the electrical signal of the vehicle-end connector 4 is transmitted and processed by the data conversion module 3 and converted into an optical signal by the photoelectric conversion module 2. The signal is then emitted and output through the coupler laser lens, and / or the received optical signal is received by the coupler laser lens and converted back into an electrical signal by the photoelectric conversion module 2. After being processed by the data conversion module 3, the signal is transmitted to the vehicle-end connector 4, thereby realizing optical communication transmission for the coupler electrical connection. In this embodiment, the photoelectric conversion module and the data conversion module do not need to be installed on the coupler body, which effectively improves the service life of the modules. Only the coupler laser lens needs to be installed on the coupler body, which effectively reduces the volume requirements of the coupler buffer device. There are no faults such as poor contact or broken electrical connection pins that exist in existing electrical couplers. The use of optical communication improves the fault tolerance of communication conditions and improves the reliability and stability of communication.

[0074] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0075] This embodiment also provides a method for controlling the electrical connection of rail vehicles, including at least two train sets, each train set being equipped with the rail vehicle electrical connection device as described in the above embodiment. Figure 11 This is a flowchart of a control method according to an embodiment of this application, such as... Figure 11 As shown, the process includes the following steps:

[0076] Electrical connection start-up step S101: System start-up, verification and initialization of the rail vehicle electrical connection device;

[0077] In step S102, after successful verification and initialization, the electrical connection device of the second rail vehicle obtains the main control information through the Ethernet communication module of the signal processing module 32 and performs handshake communication based on the main control information. That is, a call is made before the signal is sent, and a communication link is established after the receiver responds to confirm that the data information obtained by the other party is correct.

[0078] In electrical connection control step S103, if the electrical connection devices of the two rail vehicles successfully establish handshake communication, optical communication is performed through the coupler laser lens 1 and photoelectric conversion module 2. Otherwise, if the electrical connection initiation step and / or the main control information acquisition step fail, a fault handling mode is initiated. Specifically, the fault handling mode involves reporting the current fault information to the marshalling vehicle network system via the Ethernet communication module, cutting off the optical communication of the electrical connection devices of the two rail vehicles, and closing the input / output channels.

[0079] Compared with related technologies, the rail vehicle electrical connection device and its control method provided in this application adopt a brand-new non-contact optical communication method for signal transmission, which avoids poor contact of electrical connectors or breakage of electrical connector pins caused by vibration and other reasons, thereby improving the stability of train operation.

[0080] It should be noted that the steps shown in the above process or in the flowchart of the accompanying figures can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electrical connection device for rail vehicles, applied to the coupler buffer device of rail vehicles, characterized in that, include: A laser lens for the coupler is installed on the end face of the electric coupler. The photoelectric conversion module is communicatively connected to the coupler laser lens, and is also communicatively connected to the photoelectric conversion module of a vehicle to be connected via the coupler laser lens. The photoelectric conversion module is used to control the coupler laser lens to perform laser communication, receive and transmit light signals, and convert light signals into electrical signals. The data conversion module is a communication connection between the photoelectric conversion module and the vehicle-end connector of the rail vehicle. The photoelectric conversion module is integrated into the data conversion module. The photoelectric conversion module is connected to the emitting laser lens and the receiving laser lens through optical fiber cables. Based on this, the photoelectric conversion module and the data conversion module are set inside the rail vehicle and do not need to be set on the coupler body. The data conversion module further includes: The CPU processing module is electrically connected to the photoelectric conversion module; The signal processing module is electrically connected to the CPU processing module and the vehicle-end connector. The CPU processing module receives the electrical signal from the vehicle-end connector through the signal processing module, processes it, and then outputs an optical communication signal through the photoelectric conversion module and the coupler laser lens. It also receives the electrical signal converted and output by the coupler laser lens and the photoelectric conversion module and outputs it to the vehicle-end connector through the signal processing module. The signal processing module includes at least: a digital signal processing module, an Ethernet communication module, an analog-to-digital / digital-to-analog processing module, a WTB bus processing module, and an RS485 bus processing module.

2. The electrical connection device for rail vehicles according to claim 1, characterized in that, The photoelectric conversion module further includes: a laser emitting circuit and a laser receiving circuit; The laser emitting circuit includes at least a laser, a matching circuit, and a driving circuit. The matching circuit is electrically connected to the CPU processing module, and the driving circuit is electrically connected to the matching circuit and the laser. The laser receiving circuit includes at least a detector, a preamplifier circuit, a main amplifier circuit, and a matching equalization circuit that are connected in sequence. The matching equalization circuit is electrically connected to the CPU processing module to output an electrical signal.

3. The electrical connection device for rail vehicles according to claim 1, characterized in that, The digital signal processing module includes at least a digital signal input module and a digital signal output module; The digital input module includes at least a DC signal acquisition circuit, a first optocoupler isolation circuit, and a first signal processing unit that are connected in sequence. The DC signal acquisition circuit is electrically connected to the vehicle-end connector, and the first signal processing unit is electrically connected to the CPU processing module. The digital output module includes at least a second signal processing unit, a second optocoupler isolation circuit, and a digital output circuit that are electrically connected in sequence. The second signal processing unit is electrically connected to the CPU processing module, and the digital output circuit is electrically connected to the vehicle-end connector.

4. The electrical connection device for rail vehicles according to claim 1, characterized in that, The Ethernet communication module is electrically connected to the vehicle-end connector and the CPU processing module to transmit Ethernet signals between the vehicle-end connector and the CPU processing module.

5. The electrical connection device for rail vehicles according to claim 1, characterized in that, The analog-to-digital / digital-to-analog processing module includes at least a first signal filtering unit and an analog-to-digital conversion unit electrically connected to each other, and a second signal filtering unit and a digital-to-analog conversion unit electrically connected to each other. The first signal filtering unit and the second signal filtering unit are both electrically connected to the vehicle-end connector, and the analog-to-digital conversion unit and the digital-to-analog conversion unit are both electrically connected to the CPU processing module.

6. The electrical connection device for rail vehicles according to claim 1, characterized in that, The WTB bus processing module includes at least a first transformer, a second transformer, and a signal transceiver. The first transformer and the second transformer are electrically connected to the vehicle-end connector, and the signal transceiver is electrically connected to the CPU processing module.

7. The electrical connection device for rail vehicles according to claim 1, characterized in that, The RS485 bus processing module is an isolated signal transceiver, electrically connected to the vehicle-end connector and the CPU processing module.

8. The electrical connection device for rail vehicles according to any one of claims 2-7, characterized in that, The CPU processing module is used to receive data from the digital quantity processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module, and then package and reassemble the data before sending it to the photoelectric conversion module. It is also used to receive electrical signals from the photoelectric conversion module, parse the data protocol, and convert and output the data to the digital quantity processing module, Ethernet communication module, analog-to-digital / digital-to-analog processing module, WTB bus processing module, and RS485 bus processing module.

9. A method for controlling the electrical connection of a rail vehicle, comprising at least two train sets, each of the train sets being equipped with a rail vehicle electrical connection device as described in any one of claims 1-8, characterized in that, include: The electrical connection startup procedure involves verifying and initializing the electrical connection device of the rail vehicle. After successful verification and initialization of the master control information acquisition steps, the second rail vehicle electrical connection device acquires the master control information of the train network system through the Ethernet communication module of the signal processing module and performs handshake communication based on the master control information. In the electrical connection control steps, if the electrical connection device of the rail vehicle described in step two successfully establishes handshake communication, optical communication is performed through the coupler laser lens and photoelectric conversion module; otherwise, if the electrical connection start-up step and / or the main control information acquisition step fail, a fault handling mode is initiated.

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