Vehicle-mounted system for multifunctional fusion train

Abstract

The invention discloses a train-mounted system for multifunctional fusion. The train-mounted system comprises an application layer, a subsystem layer, a system operation layer, an acquisition layer and a sensing layer, the application layer comprises a system application software end, a system communication end, a system management end and a system updating end; and the subsystem layer comprises at least more than one operation and maintenance subsystem. And the operation and maintenance subsystem analyzes calculation and resource demands of the subsystem according to the function demands and the performance indexes, and provides the calculation and resource demands to the multifunctional fusion train vehicle-mounted system. The multifunctional fusion train vehicle-mounted system distributes resources for the operation and maintenance system to operate software; the operating system layer comprises an operating system and a middleware component; the acquisition layer comprises access of digital quantity signal and analog quantity signal equipment, a preprocessor and a matched cable; the multifunctional fusion train-mounted system completes data acquisition and preprocessing of each device of the train sensing layer through the acquisition layer. And the sensing layer supports analog quantity acquisition equipment and digital quantity acquisition equipment and is used for acquiring data required by each system.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transportation, and in particular relates to an on-board system for a multifunctional fusion train. Background Art

[0002] With the continuous maturity of technology and the trend of train intelligence, the number of on-board intelligent systems carried by trains has gradually increased, such as the running gear online monitoring system, vehicle dynamics online monitoring system, bow net monitoring system, lighting system, smart window system, passenger information system, intelligent air conditioning information system, battery monitoring system, etc. However, the main problems currently exist are: the various on-board systems of the train are independent of each other, and each system usually uses its own on-board host equipment, communication network, data processing method, and fault diagnosis technology. There is often a lack of interoperability and coordination between different train subsystems, resulting in low train operation efficiency, high operation and maintenance costs, and unstable safety performance. The increase in the number of subsystems carried by trains has resulted in increasingly complex network architecture, a large number of on-board devices and connections, uncontrollable operating systems and supporting software, increased train weight and energy consumption, reduced train reliability and safety, and increased the difficulty and workload of train maintenance.

[0003] Each subsystem sets up its own computing and processing module, resulting in serious waste of computing, storage and other resources. In addition, due to differences in equipment parameters, performance and other aspects, the interfaces lack unified standards and specifications, which is not conducive to the operation and interconnection of trains across lines, standards and models, nor is it conducive to technical upgrades and innovations of trains.

[0004] At the same time, the connections between systems are complex and the scalability is poor, which is not conducive to the rapid connection and deployment of new business systems. Summary of the invention

[0005] The present invention provides a multifunctional integrated train on-board system, the improvement of which is that the on-board system includes an application layer, a subsystem layer, a system operation layer, a collection layer, and a perception layer;

[0006] The application layer includes the system application software end, the system communication end, the system management end and the system update end; the subsystem layer includes at least one operation and maintenance subsystem; the operation and maintenance subsystem analyzes the computing and resource requirements of its own subsystem according to functional requirements and performance indicators, and provides them to the multifunctional integrated train on-board system; the multifunctional integrated train on-board system allocates resources for the operation and maintenance system to run the software; the operating system layer includes the operating system and middleware components; the acquisition layer includes the access of digital signals and analog signal equipment, the pre-processor and supporting cables; the multifunctional integrated train on-board system completes the data collection and pre-processing of each device in the train perception layer through the acquisition layer; the perception layer supports analog acquisition equipment and digital acquisition equipment, and the perception layer is used to collect the data required by each system.

[0007] Furthermore, the multifunctional integrated train onboard system encapsulates each operation and maintenance subsystem into a container through docker virtualization technology, and the container contains the application program and operating environment of the operation and maintenance subsystem.

[0008] Furthermore, the multifunctional integrated train onboard system limits and allocates the CPU, memory, network, and disk resources of the container by setting docker resource limitation parameters according to the computing requirements provided by the operation and maintenance subsystem.

[0009] Furthermore, the operation and maintenance subsystem is independent of the multifunctional integrated train onboard system through the containerization mode, and obtains the computing resources and operating software required by each.

[0010] Furthermore, the preprocessor preprocesses the collected sensor data, and the digital signal and analog signal access device preprocesses the signal data into the data format required by each system, and transmits it to the multifunctional fusion train on-board system.

[0011] Furthermore, the perception layer and the collection layer are connected via a standardized interface and matching cables.

[0012] Furthermore, the multifunctional integrated train on-board system includes an on-board host, digital signal, analog signal access equipment, a pre-processor and supporting cables, analog acquisition equipment and digital acquisition equipment.

[0013] Furthermore, each subsystem of the multifunctional integrated train onboard system stores data locally or transmits it to an external device through the integrated main system.

[0014] Furthermore, the multifunctional integrated train onboard system is connected to TCMS, train maintenance Ethernet, and ground transmission network;

[0015] Among them, TCMS supports MVB and TRDP protocols;

[0016] The ground transmission network includes PIDS network, EUHT, and separate vehicle-to-ground communication channel.

[0017] Beneficial effects:

[0018] The present invention provides a multifunctional integrated train onboard system to achieve onboard system service integration, enhance the onboard system coordination, compatibility, flexibility, and scalability, thereby achieving the technical effect of simplifying the architecture of the train management system, saving considerable costs, and improving operation and maintenance efficiency. The present invention realizes onboard system service integration at the system level, and the operation and maintenance subsystems communicate using train Ethernet. A service platform built with centralized computing and virtualization technology is introduced as a system-level infrastructure to achieve good coordination between multiple systems.

[0019] The present invention realizes the integration of on-board intelligent on-board system services, data interconnection and functional coordination between different systems, simplifies the overall system construction, and reduces system complexity.

[0020] The present invention realizes the interconnection and intercommunication between subsystems and train networks, including TCMS (supporting MVB and TRDP protocols), train maintenance Ethernet, ground transmission network (such as PIDS network, EUHT, separate train-to-ground communication channel), etc., and realizes a set of systems to support all mainstream train-level networks. It interconnects and interoperates with train networks and other train systems by allocating subsystem port numbers and unified communication protocols.

[0021] It should be understood that the above general description and the following specific embodiments are only exemplary and illustrative and do not limit the scope of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural diagram of a multifunctional integrated train onboard system according to the present invention;

[0023] Figure 2 A dual network redundancy structure diagram of a multifunctional fusion train onboard system according to the present invention;

[0024] It should be understood that the drawings are not necessarily drawn to scale, presenting somewhat simplified representations of various features illustrative of the basic principles of the present disclosure. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.

[0025] In the drawings, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0026] Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments of the present invention, it should be understood that this specification is not intended to limit the present invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifiers, equivalents and other embodiments, which may be included in the spirit and scope of the present invention as defined by the appended claims.

[0027] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The specific structures and functions described in the exemplary embodiments of the present invention are for illustrative purposes only. Embodiments according to the concepts of the present invention can be implemented in various forms, and it should be understood that they should not be interpreted as being limited to the exemplary embodiments described in the exemplary embodiments, but include all modifications, equivalents or substitutes included in the spirit and scope of the present invention.

[0028] Throughout the specification, the professional terms used herein are only for describing various exemplary embodiments and are not intended to be limiting. It will be further understood that the terms "include", "comprising", "having", etc., when used in the exemplary embodiments, specifically refer to the presence of the stated parts, steps, operations or elements, but do not exclude the presence or addition of one or more other parts, steps, operations or elements.

[0029] like Figures 1-2 As shown, the present invention provides a multifunctional integrated train on-board system, which includes an application layer, a subsystem layer, a system operation layer, a collection layer, and a perception layer.

[0030] The application layer includes the system application software end, the system communication end, the system management end and the system update end; the subsystem layer includes at least one operation and maintenance subsystem.

[0031] The system communication end includes ground communication and TCMS communication, and retains communication interfaces with other possible onboard subsystems; the system management end includes commonly used device management, user management, log management, system version management, etc.; the system update end can be incorporated into the system operation layer management. The application software end is built according to business scenarios, and can build separate application presentations for multiple subsystems, integrated processing of real-time application status, advanced faults, and data management; the operation and maintenance subsystem analyzes the computing and resource requirements of its own subsystems based on functional requirements and performance indicators, and provides them to the multifunctional fusion train onboard system. The multifunctional fusion train onboard system allocates resources for the operation and maintenance system to run the software; the operating system layer includes the operating system and middleware components;

[0032] The acquisition layer includes the access of digital signals, analog signals and other devices, pre-processors and supporting cables. The acquisition layer has the access capabilities of digital, analog and image, and is composed of software and hardware. Multiple interfaces are reserved on the hardware, and normative definitions are set for the interfaces. The software has universal access protocol support, and algorithms can be developed around the processing logic of discovering and docking different types of devices. The multifunctional fusion train on-board system completes the data collection and preprocessing of each device in the train perception layer through the acquisition layer. The perception layer supports analog acquisition devices and digital acquisition devices, such as various types of sensors, cameras, radars, etc. The perception layer is used to collect the data required by each system.

[0033] In the above technical solution, each level of the vehicle-mounted system has different functions and tasks. This makes the integration of the entire system complicated, and it is necessary to establish a stable interface and communication mechanism between each level. The system uses Ethernet LAN UDP and Uinx domain socket for communication. The maximum limit of UDP packet is 1432 bytes, which realizes fast and efficient real-time communication at all levels of the system.

[0034] In the above technical solution, the multifunctional fusion train onboard system includes a docker management module, and each operation and maintenance subsystem operates independently according to functional requirements and performance indicators, and it is necessary to ensure seamless integration and resource allocation between each sub-operation and maintenance system and the multifunctional fusion train onboard system. The multifunctional fusion train onboard system uses docker virtualization technology to encapsulate each operation and maintenance subsystem into a container, which contains the application and operating environment of the operation and maintenance subsystem, ensuring the optimal utilization of system resources and the independent operation of the operation and maintenance subsystem.

[0035] The multifunctional integrated train onboard system can create five containers, which are used for the running gear online monitoring system, obstacle detection system, wheel-rail force detection system, and vehicle dynamics online monitoring system. The CPU and memory resource limits of the container are configured according to the performance indicators of each system, and the network mode is bridge mode.

[0036] In the above technical solution, when multiple tasks are running in parallel, uneven resource allocation may lead to insufficient resources for some tasks, affecting system performance. The multifunctional integrated train onboard system finely controls and allocates the CPU, memory, network, and disk resources of the container by setting Docker's resource restriction parameters (such as --cpus, --memory, --blkio-weight, etc.) according to the computing requirements provided by the operation and maintenance subsystem; ensures that key tasks are given priority, uses Docker's network mode (bridge) to configure the network between containers, and combines firewall rules and network policies to ensure safe and efficient communication. Use Docker's storage driver overlay2 to optimize disk I / O performance, and combine disk I / O restriction parameters (--device-read-bps, --device-write-bps) to control the disk I / O of each container; use Docker images to encapsulate the application and dependent environment of the operation and maintenance subsystem to ensure consistency and portability. Update and test images regularly to avoid resource competition between containers and ensure compatibility and stability.

[0037] Among them, the docker parameters include:

[0038] The --cpus parameter can specify the number of CPU cores that the container can use;

[0039] The --cpu-shares parameter can set the relative weight of the container's use of CPU;

[0040] The -m or --memory parameter can limit the memory size used by the container;

[0041] The --network parameter can set the network mode of the container;

[0042] --network=host means the container uses the host's network;

[0043] --network=bridge means the container uses a bridge network;

[0044] The --device parameter allows the container to access devices on the host.

[0045] In the above technical solution, the operation and maintenance subsystem is independent of the multifunctional integrated train onboard system through the containerization mode to obtain the computing resources required by each. At the same time, multiple operation and maintenance subsystems are isolated from each other and can be interconnected, including TCMS (which can support MVB and TRDP protocols), train maintenance Ethernet, ground transmission network (such as PIDS network, EUHT, separate vehicle-to-ground communication channel), etc., to achieve a set of systems to support all mainstream train-level networks. Interconnection with the train network and other train systems by allocating subsystem port numbers and unified communication protocols.

[0046] In the above technical solution, the acquisition card converts the analog signal or digital signal output by the sensor into a format that can be recognized by the vehicle-mounted host; according to the type and data format of the sensor, a suitable acquisition card is selected. For example, if an industrial camera uses analog signal output, an analog signal acquisition card is required. If a laser radar usually uses digital signal output, a digital signal acquisition card can be used.

[0047] The preprocessor preprocesses the collected data and transmits the converted data to the multifunctional fusion train on-board system.

[0048] In the above technical solution, the preprocessor is located between the acquisition layer and the host equipped with the multifunctional fusion train on-board system. The preprocessor of the system preprocesses the collected source data, uses filtering algorithms (such as mean filtering, median filtering, Gaussian filtering) to remove noise, and uses statistical methods (such as Z-score, IQR) to detect and process outliers. The digital, analog, and image signal access equipment preprocesses the signal data, designs a special preprocessing module for each signal type, optimizes the algorithm and data processing flow, uses efficient hardware acceleration technology (FPGA) to increase the processing speed, and uses standardized protocols to convert the preprocessed data into a unified format; and transmits the data in a unified format to the multifunctional fusion train on-board system to reduce the burden on the on-board host.

[0049] In the above technical solution, the multifunctional integrated train onboard system includes onboard host, digital, analog, image signal access equipment, preprocessor and supporting cables, sensors, cameras, radars and other terminal acquisition equipment;

[0050] The multifunctional integrated train onboard system adopts Kylin V10 as the basic operating system, deployed on an industrial computer, equipped with an 8-core CPU, 16GB memory, and a 2TB hard disk; the system has the characteristics of high security, high reliability, high performance, and high compatibility. It supports multiple hardware platforms such as X86, ARM, Loongson, and Shenwei, and is suitable for multiple scenarios such as desktops, servers, and embedded systems. It has been widely used in government, finance, education, and medical fields.

[0051] The sensors include axle box temperature-vibration composite sensor, motor temperature-vibration composite sensor, gear box temperature-vibration composite sensor, vehicle body vibration sensor, frame vibration sensor, and axle box vibration sensor;

[0052] The data interface is an RS485 digital interface, a 4-20mA analog output interface and an M12 Ethernet interface.

[0053] In the above technical solution, the sensor outputs data to the system acquisition layer, the system acquisition layer converts the data into a format recognizable by the onboard host in the multifunctional fusion train onboard system, the preprocessor preprocesses the data and transmits it to the multifunctional fusion train onboard system, and each subsystem stores the data locally or transmits it to an external device through the fusion main system.

[0054] The perception layer and the acquisition layer are connected using international or industry standard interface protocols such as (RS458, Ethernet) and supporting cables to ensure compatibility between different devices and vehicle systems; shielded cables and anti-interference technology (such as differential signal transmission) are used to ensure the stability and reliability of signal transmission; modular design and cable management systems (such as cable ducts and wire pipes) are used to simplify wiring and management, and facilitate system maintenance and expansion; high-speed transmission interfaces and high-bandwidth cables are selected to ensure that the data transmission rate and bandwidth meet system requirements.

[0055] In the above technical solution, if Figure 2 As shown, the multifunctional fusion train onboard system adopts a dual network redundant structure of network A and network B, which are connected to the TCMS and PIDS networks respectively, and uses a unified TCP / IP transmission protocol to transmit file data and video data. MD5 checksum is enabled for file data, and compression encoding is enabled for video data. The multifunctional fusion train onboard system can be allocated to the communication ports of each operation and maintenance subsystem through the set container network parameters, and data communication with the outside is unified through the communication interface of the multifunctional fusion train onboard system, and transmitted through a unified data protocol.

[0056] In the above technical solution, the data protocol includes message data and file data. Message data includes real-time messages, fault pictures and videos, etc. File data includes large files (high-definition pictures, audio, video), etc.

[0057] In the above technical solution, the multifunctional integrated train onboard system also communicates with the ground server in a unified manner. Real-time data is transmitted to the ground server through the PIDS channel, realizing the collection, processing, transmission and storage of train data, providing data guarantee for train operation safety monitoring, fault diagnosis, vehicle maintenance, etc.

[0058] In the above technical solution, the multifunctional integrated train onboard system is also used for software version control services and onboard software update services;

[0059] The software version control service is responsible for managing software versions, including software development, management, and storage. It uses Git secure open source software for unified management. The service is deployed on the ground server. The management personnel of each operation and maintenance subsystem develop software through the software version control service and submit the software version to the software version control service.

[0060] The management personnel receive new software update files through the onboard software service of the multifunctional integrated train onboard system through sftp, ftp and other transmission methods. The multifunctional integrated train onboard system automatically sends the software version to each operation and maintenance subsystem of each train and updates the software version with unified operations.

[0061] In the above technical solutions, the multifunctional integrated train onboard system supports real-time enhancement technologies such as Cokernel, PREEMPT_RT, and domain virtualization, which can achieve microsecond interrupt delay and task switching delay. It adopts a Linux-compatible intrinsic security kernel and supports a variety of security functions, such as secure boot, security reinforcement, and security audit. It adopts lightweight desktop environment, efficient resource management and other technologies to meet the requirements of long-term unattended operation of industrial equipment. It supports a variety of embedded chips, multiple programming languages, and multiple software development tools. It supports edge computing, cloud computing and other technologies to realize data interaction between devices and cloud platforms.

[0062] The present invention uses virtualization technology to achieve resource pooling and on-demand allocation, improves computing resource utilization by more than 30%, and greatly reduces hardware costs. For example, after integrating the running gear online monitoring system, obstacle detection system, wheel-rail force detection system, and vehicle dynamics online monitoring system, the original hardware equipment required: 4x 4-core arm architecture CPU, 4x 8GB memory, 4x 1TB hard disk, 17 related boards (MVB board, IO board, diagnostic board, power board, main control board, computing board), and 4 chassis. It is reduced to 1x 8-core arm CPU, 1x 16GB memory, 1x 2TB hard disk, 6 boards, and 1 chassis.

[0063] The above-mentioned embodiments of the present application can be implemented in various hardware, software coding or a combination of the two. For example, the embodiments of the present application can also represent the program code for executing the above-mentioned method in a data signal processor. The present application can also relate to the various functions performed by a computer processor, a digital signal processor, a microprocessor or a field programmable gate array. The above-mentioned processor can be configured according to the present application to perform specific tasks, which are completed by executing machine-readable software code or firmware code that defines the specific method disclosed by the present application. The software code or firmware code development can represent different programming languages ​​and different formats or forms. Different target platform compiled software codes can also be represented. However, the different code styles, types and languages ​​of the software code for performing tasks according to the present application and other types of configuration codes do not depart from the spirit and scope of the present application.

[0064] The foregoing description of specific exemplary embodiments of the present invention has been presented for the purpose of illustration and description. It is not intended to exclude or limit the present invention to the precise form disclosed, and it is obvious that many modifications and changes are feasible in view of the above teachings. Exemplary embodiments are selected and described to explain certain principles of the present invention and their practical application, so that other technicians in the field can make or use various exemplary embodiments of the present invention, and various alternatives and modifications thereof. It is intended that the scope of the present invention will be defined by the claims attached hereto and their equivalents.

[0065] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A multifunctional integrated train onboard system, characterized in that: The vehicle-mounted system includes an application layer, a subsystem layer, a system operation layer, a collection layer, and a perception layer; The application layer includes the system application software end, the system communication end, the system management end and the system update end; the subsystem layer includes at least one operation and maintenance subsystem; the operation and maintenance subsystem analyzes the computing and resource requirements of its own subsystem according to the functional requirements and performance indicators, and provides them to the multifunctional integrated train onboard system; The multifunctional integrated train onboard system allocates resources for the operation and maintenance system to run the software; the operating system layer includes the operating system and middleware components; the acquisition layer includes the access of digital signal and analog signal equipment, the pre-processor and supporting cables; The multifunctional integrated train on-board system completes data collection and preprocessing of each device in the train perception layer through the acquisition layer; the perception layer supports analog quantity acquisition devices and digital quantity acquisition devices, and the perception layer is used to collect the data required by each system.

2. The multifunctional integrated train-mounted system according to claim 1, characterized in that: The multifunctional integrated train on-board system encapsulates each operation and maintenance subsystem into a container through the docker virtualization technology, and the container contains the application program and operating environment of the operation and maintenance subsystem.

3. The multifunctional integrated train-mounted system according to claim 2 is characterized in that: The multifunctional fusion train onboard system limits and allocates the CPU, memory, network, and disk resources of the container by setting the resource limitation parameters of Docker according to the computing requirements provided by the operation and maintenance subsystem.

4. The multifunctional integrated train-mounted system according to claim 3 is characterized in that: The operation and maintenance subsystem is independent of the multifunctional integrated train onboard system through the containerization mode, and obtains the computing resources and operating software required by each.

5. The multifunctional integrated train-mounted system according to claim 1 is characterized in that: The preprocessor preprocesses the collected sensor data, and the digital signal and analog signal access device preprocesses the signal data into the data format required by each system, and transmits it to the multifunctional fusion train on-board system.

6. The multifunctional integrated train-mounted system according to claim 1, characterized in that: The perception layer and the collection layer are connected via standardized interfaces and matching cables.

7. The multifunctional integrated train-mounted system according to claim 1 is characterized in that: The multifunctional integrated train on-board system includes an on-board host, digital signal, analog signal access equipment, a pre-processor and supporting cables, analog acquisition equipment and digital acquisition equipment.

8. The multifunctional integrated train-mounted system according to claim 7 is characterized in that: Each subsystem of the multifunctional integrated train onboard system stores data locally or transmits it to an external device through the integrated main system.

9. The multifunctional integrated train-mounted system according to claim 8, characterized in that: The multifunctional integrated train onboard system is connected to TCMS, train maintenance Ethernet, and ground transmission network; Among them, TCMS supports MVB and TRDP protocols; The ground transmission network includes PIDS network, EUHT, and separate vehicle-to-ground communication channel.

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