CN214384910U - A Synchronous Transmission System for Vehicle Star Ring Network - Google Patents
A Synchronous Transmission System for Vehicle Star Ring Network Download PDFInfo
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Abstract
本实用新型提供一种车载星型环状网络的同步传输系统，包括：TSN交换机通过光纤车载以太网总线与域控制器相连接，TSN交换机通过光纤车载以太网总线和/或车载以太网总线与传感器系统相连接；传感器系统包括多个传感器，每个子系统中多个传感器依次首尾相连形成环状网络，环状网络中当前节点的传感器通过与其后相邻节点的传感器将数据逐个单向传播转发汇聚到TSN交换机进行分发。相比现有技术采用的点对点的视频传输方法，能够节省线束，降低线束重量，能够提供高可靠性。另外，由于采用光纤车载以太网总线进行传输，传输速率高达1～10G/s，使得能够传输无损压缩的高清视频数据、激光雷达和毫米波雷达的点云数据。
The utility model provides a synchronous transmission system of a vehicle-mounted star-shaped ring network, comprising: a TSN switch is connected with a domain controller through an optical fiber vehicle-mounted Ethernet bus, and the TSN switch is connected to the The sensor system is connected; the sensor system includes multiple sensors, and the multiple sensors in each subsystem are connected end-to-end to form a ring network. The sensor of the current node in the ring network transmits data one by one through the sensors of the adjacent nodes. Aggregated to TSN switches for distribution. Compared with the point-to-point video transmission method adopted in the prior art, the wiring harness can be saved, the weight of the wiring harness can be reduced, and high reliability can be provided. In addition, due to the use of optical fiber vehicle Ethernet bus for transmission, the transmission rate is as high as 1 to 10G/s, which enables the transmission of lossless compressed high-definition video data, and point cloud data of lidar and millimeter-wave radar.
Description
Technical Field
The utility model relates to a synchronous transmission's of on-vehicle star type annular network high-speed transmission especially relates to an on-vehicle star type annular network's synchronous transmission system.
Background
With the development of automobiles towards the direction of intellectualization, safety and individualization, more sensors are installed on intelligent automobiles compared with traditional automobiles due to automatic driving, unmanned driving and auxiliary driving, for example, an automatic driving system of Tesla, wherein at least 8 vehicle-mounted Ethernet cameras, at least 10 radar sensors, millimeter wave radar, ultrasonic radar and the like are deployed on an automobile body. At present, the automobile network architecture is still a distributed network architecture, and after the sensors are connected with the switch through the CAN bus, the LIN bus, the LVDS bus and the MOST bus, signals are transmitted to the ECU through the switch. In order to solve the problems of high-speed transmission and cost reduction, the inventor of the present invention proposes a high-speed transmission system of a ring network, as shown in fig. 1, which performs data transmission by connecting different types of sensors, such as a display device, a vehicle-mounted ethernet camera, and a laser radar, in series through an optical fiber, and this design method can reduce the length of a wire harness compared to the conventional point-to-point transmission, thereby reducing the weight and cost of a vehicle body. However, since the automobile needs to satisfy high reliability, although the cost is reduced, if the communication of one node in the ring network fails, the whole vehicle-mounted network is necessarily broken down and cannot work normally. Therefore, the technical solution in fig. 1 has a problem of low reliability, and it is desirable to provide a low-cost and high-reliability automobile network transmission system to solve the existing technical problem.
Disclosure of Invention
In order to solve the defects in the prior art, the present implementation provides a synchronous transmission system of a vehicle-mounted star ring network, which is characterized by comprising: the system comprises a domain controller, a TSN switch and at least one sensor system, wherein the TSN switch is connected with the domain controller through an optical fiber vehicle-mounted Ethernet bus, and the TSN switch is connected with the sensor system through the optical fiber vehicle-mounted Ethernet bus and/or the vehicle-mounted Ethernet bus; the sensor system comprises one or more subsystems, a plurality of sensors in each subsystem are sequentially connected end to form an annular network, and the sensor of the current node in the annular network transmits and converges data to the TSN one by one in a one-way mode through the sensor of the adjacent node behind the sensor to be distributed.
A synchronous transmission system of a vehicle-mounted star-shaped annular network is further provided, and subsystems are one or more of a camera system, a display system, a multimedia audio-visual system, a laser radar system and a millimeter wave radar system.
A synchronous transmission system of a vehicle-mounted star-ring network, further, a domain controller at least comprises: the system comprises an SOC chip, a first FPGA chip and a first optical fiber vehicle-mounted Ethernet PHY chip, wherein the first FPGA chip is connected with the SOC chip and the first optical fiber vehicle-mounted Ethernet PHY chip.
An SOC chip is connected with a first FPGA chip through one or more interfaces of an MIPI interface, a PCI-E interface, an I2C interface and a GPIP interface, wherein the MIPI interface is used for transmitting video stream data, the PCI-E interface is used for transmitting video stream data or large-flow data, and the I2C interface or the GPIO interface is used for configuring a circuit working mode in the first FPGA chip.
A synchronous transmission system of a vehicle-mounted star-ring network, further, a TSN switch at least comprises: the MCU, the second optical fiber vehicle-mounted Ethernet PHY chip, the third optical fiber vehicle-mounted Ethernet PHY chip and the second FPGA chip are respectively connected with the FGPA chip through the xGMII interface and the SMII interface.
The utility model provides a synchronous transmission system of on-vehicle star type ring network, further, the sensor of subsystem includes data transmission interface module and main function chip, and wherein, data transmission interface module is connected with main function chip, and data transmission interface module includes: the FPGA chip is connected with the fourth optical fiber vehicle-mounted Ethernet PHY chip through an MIPI interface and an I2C/GPIO interface.
A synchronous transmission system of a vehicle-mounted star-ring network is further provided, wherein a fourth optical fiber vehicle-mounted Ethernet PHY chip or a first optical fiber vehicle-mounted Ethernet PHY chip, a second optical fiber vehicle-mounted Ethernet PHY chip or a third optical fiber vehicle-mounted Ethernet PHY chip comprises: the vehicle-mounted Ethernet PHY chip is respectively connected with the optical fiber input interface and the optical fiber output interface.
The utility model provides a synchronous transmission system of on-vehicle star type looped network, furtherly, the camera system includes a plurality of on-vehicle ethernet cameras, and display system includes display device, and the laser radar system includes laser radar, and millimeter wave radar system includes the millimeter wave radar, and multimedia audio-visual system includes GPS sensor, inertial sensor, radio at least.
A synchronous transmission system of a vehicle-mounted star-shaped ring network is characterized in that one or more standard protocols of IEEE802.1 Qat, IEEE802.1AS, IEEE802.1 Qav, IEEE802.1Asbt, IEEE802.1Qbv, IEEE802.1Qbu and IEEE802.1Qca are followed in the data transmission process of a TSN switch and a domain controller.
A synchronous transmission system of a vehicle-mounted star-ring network, further, the optical fiber input interface 201 includes: the photoelectric detector is used for converting the optical signal into an electric signal and outputting the electric signal to the vehicle-mounted Ethernet PHY chip;
the fiber output interface includes: the optical fiber vehicle-mounted Ethernet bus comprises a vertical cavity profile emitting laser and a second lens, wherein an electric signal from a vehicle-mounted Ethernet PHY chip passes through the vertical cavity profile emitting laser and then is converted into an optical signal, and the optical signal is transmitted to the second lens and then is coupled to enter the optical fiber vehicle-mounted Ethernet bus for transmission.
The beneficial technical effects are as follows: this reality is novel through adopting star type vehicle network, and in the vehicle network, the subsystem of every sensor forms the ring network. Compared with a point-to-point video transmission method adopted in the prior art, the wiring harness can be saved, and the weight of the wiring harness is reduced. Since each sensor subsystem can operate independently, failure of a subsystem does not affect the normal operation of the other subsystems, providing high reliability. In addition, the optical fiber vehicle-mounted Ethernet bus is adopted for transmission, so that the transmission rate is as high as 1-10G/s.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a schematic diagram of the structure of the vehicular ring network of the present invention.
Fig. 2 is a schematic diagram of an embodiment of the present invention, showing a vehicle-mounted star network structure.
Fig. 3 is a schematic structural diagram of a domain controller according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an optical fiber vehicle-mounted ethernet PHY chip according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a TSN switch according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a sensor in a subsystem according to an embodiment of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects herein, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, the drawings schematically show the relevant parts of the invention, and do not represent the actual structure of the product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.
The utility model discloses in "connect", can include direct connection, also can include indirect connection, communication connection, electricity and connect except that the particular description.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, values, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, values, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items
It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally includes motor vehicles such as passenger automobiles including Sport Utility Vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including a variety of boats, ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from non-petroleum sources). As referred to herein, a hybrid vehicle is a vehicle having two or more power sources, such as both gasoline-powered and electric-powered vehicles.
The present embodiment provides a synchronous transmission system of a vehicle-mounted star-ring network, as shown in fig. 2 to 6, specifically including: the system comprises a domain controller 11, a TSN switch 17 and at least one sensor system, wherein the TSN switch 17 is connected with the domain controller 11 through an optical fiber vehicle-mounted Ethernet bus, and the TSN switch 17 is connected with the sensor system through the optical fiber vehicle-mounted Ethernet bus and/or the vehicle-mounted Ethernet bus; the sensor system comprises one or more subsystems, a plurality of sensors in each subsystem are sequentially connected end to form a ring network, and the sensor of the current node in the ring network transmits and gathers data to the TSN switch 17 for distribution one by one in a one-way mode through the sensor of the adjacent node behind the sensor.
The subsystems are one or more of a camera system 12, a display system 16, a multimedia audio and video system 15, a laser radar system 13 and a millimeter wave radar system 14;
the sensor in each subsystem of the sensor is provided with an input interface and an output interface;
the TSN switch 17 is provided with an input interface and an output interface, the domain controller 11 is provided with an input interface and an output interface, and the input and output interfaces of the TSN switch 17 and the domain controller 11 comprise 1 or more than one because the TSN switch 17 and the domain controller 11 need to be connected with a plurality of different external devices.
When there are multiple sensors in each subsystem, the connection order is: the input interface of the first sensor is connected with one output interface of the TSN switch 17, the output interface of the first sensor is connected with the input interface of the rear adjacent sensor, and so on, the input interface of the last sensor is connected with the output interface of the front adjacent sensor, the output interface of the last sensor is connected with one input interface of the TSN switch 17, and data is transmitted unidirectionally step by step.
Specifically, in a ring network formed by subsystems, a data stream transmission mode is unidirectional transmission, firstly, a TSN switch 17 transmits a received control signal to a first sensor connected with the TSN switch through an output interface and an optical fiber vehicle-mounted ethernet bus, after the first sensor acquires a required control signal, the generated data and the rest of the control signal are transmitted to a sensor adjacent to the first sensor through the output interface, and so on until the data and/or the control signal are converged and transmitted to the TSN switch 17 through an input interface of the TSN switch 17.
The camera system 12 sensor comprises a vehicle-mounted Ethernet camera, the display system 16 comprises a plurality of display devices, the multimedia audio and video system 15 comprises a radio, a GPS navigation and an inertial sensor,
the laser radar system 13 comprises a laser radar, the millimeter wave radar system 14 comprises a millimeter wave radar, and the wave bands of the millimeter wave radar can be the same or different, such as 24GHz, 77GHz and the like
Specifically, the camera system 12 employs a plurality of vehicle-mounted ethernet cameras, and preferably, the number of the vehicle-mounted ethernet cameras is 4, and the cameras are respectively installed at front, rear, left, and right positions of the vehicle body.
The plurality of vehicle-mounted Ethernet cameras are sequentially connected end to end, the input interface of the vehicle-mounted Ethernet camera at the head is connected with one output interface of the TSN switch 17, the output interface of the vehicle-mounted Ethernet camera at the tail is connected with one input interface of the TSN switch 17, and video data are transmitted in a one-way step-by-step mode.
Specifically, in the laser radar system 13, it is preferable that the number of laser radars in the vehicle-mounted network is 1 in consideration of the very high cost of the laser radars.
Of course, the number of the laser radars is not limited in this embodiment, and may be plural.
The domain controller 11 includes at least: the system comprises an SOC chip 111, a first FPGA chip 110 and a first optical fiber vehicle-mounted Ethernet PHY chip 112, wherein the first FPGA chip 110 is connected with the SOC chip 111 and the first optical fiber vehicle-mounted Ethernet PHY chip 112.
The SOC chip 111 is connected to the first FPGA chip 110 through one or more interfaces of an MIPI interface, a PCI-E interface, an I2C interface, and a GPIP interface, where the MIPI interface is used to transmit video stream data and the PCI-E interface is used to transmit video stream data or large flow data, and the I2C interface or the GPIO interface is used to configure a circuit operation mode in the first FPGA chip 110.
In this embodiment, the data analysis is performed by a transmission interface module, and the transmission interface module includes an FPGA chip and a PHY chip of the fiber vehicle ethernet.
In this embodiment, the data analysis adopted in the data transmission process of the sensors in the domain controller 11, the TSN switch 17, and the sensor system includes at least PHY chips of the PFGA and the fiber vehicle ethernet.
TSN switch 17 includes at least: the MCU171, the second optical fiber vehicle-mounted Ethernet PHY chip 172, the third optical fiber vehicle-mounted Ethernet PHY chip 174 and the second FPGA chip 173 are connected with the second FPGA chip 173 through xGMII and SMII interfaces respectively.
The sensor of the subsystem includes a data transmission interface module 300 and a main function chip 302, wherein the data transmission interface module 300 is connected with the main function chip 302, and the data transmission interface module 300 includes: the FPGA chip 303 is connected with the fourth optical fiber vehicle-mounted Ethernet PHY chip 301 through an MIPI interface and an I2C/GPIO interface
The main function chip 302 is a chip for implementing a core function of the sensor in the corresponding subsystem, and since the main function chip 302 belongs to the prior art, the structure is not elaborated in this embodiment. For example, the main function chip 302 of the vehicle-mounted camera is a chip for realizing image acquisition, and the main function chip 302 of the display device in the display system 16 realizes a chip for converting data into video for display.
The fourth fiber vehicle ethernet PHY chip 301 or the first fiber vehicle ethernet PHY chip 112, the second fiber vehicle ethernet PHY chip 172 or the third fiber vehicle ethernet PHY chip 174 includes: the vehicle-mounted Ethernet PHY chip 202 is connected with the optical fiber input interface 201 and the optical fiber output interface 204 respectively.
The optical fiber input interface 201 includes: the optical signal from the optical fiber is coupled into the photoelectric detector 203 through the first lens 207, and the photoelectric detector 203 converts the optical signal into an electrical signal and outputs the electrical signal to the vehicle-mounted Ethernet PHY chip 202;
the fiber output interface 204 includes: the optical fiber vehicle-mounted Ethernet bus comprises a vertical cavity type surface emitting laser 205 and a second lens 206, wherein an electric signal from the vehicle-mounted Ethernet PHY chip 202 is converted into an optical signal after passing through the vertical cavity type surface emitting laser 205, and the optical signal is transmitted to the second lens 206 and then is coupled into the optical fiber vehicle-mounted Ethernet bus for transmission.
The data transmission process in the TSN switch 17 and the domain controller 11 follows one or more standard protocols of IEEE802.1 Qat, IEEE802.1AS, IEEE802.1 Qav, IEEE 802.11 asbt, IEEE802.1qbv, IEEE802.1qbu, and IEEE802.1 qca.
For example: when a plurality of simultaneous data communication requests exist in the TSN switch 17, the TSN switch transmits the time-triggered data according to the protocol, transmits the AVB multimedia data, and transmits the non-real-time data, and the specific data transmission priority and synchronization requirements can be realized according to the standard protocol.
The power supply is used for supplying power to the domain controller 11, the sensor system and the TSN switch 17;
the power supply can be arranged in the electronic control unit, and is connected with the vehicle-mounted Ethernet camera of the annular network through a power line and supplies power to the vehicle-mounted Ethernet camera.
Specifically, the power supply can also be arranged independently, and the display device, the electronic control unit and the vehicle-mounted Ethernet camera are powered by the independent power supply.
What has been described above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is clear to those skilled in the art that the form in this embodiment is not limited thereto, and the adjustable manner is not limited thereto. It is understood that other modifications and variations directly derivable or suggested by a person skilled in the art without departing from the basic idea of the invention are considered to be within the scope of protection of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120223536.5U CN214384910U (en) | 2021-01-27 | 2021-01-27 | A Synchronous Transmission System for Vehicle Star Ring Network |
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| CN202120223536.5U CN214384910U (en) | 2021-01-27 | 2021-01-27 | A Synchronous Transmission System for Vehicle Star Ring Network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114070386A (en) * | 2022-01-17 | 2022-02-18 | 成都国星宇航科技有限公司 | Satellite-borne Ethernet communication system |
| CN114619962A (en) * | 2022-03-15 | 2022-06-14 | 上海赫千电子科技有限公司 | Automatic driving system with asymmetric transmission |
-
2021
- 2021-01-27 CN CN202120223536.5U patent/CN214384910U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114070386A (en) * | 2022-01-17 | 2022-02-18 | 成都国星宇航科技有限公司 | Satellite-borne Ethernet communication system |
| CN114070386B (en) * | 2022-01-17 | 2022-04-26 | 成都国星宇航科技有限公司 | Satellite-borne Ethernet communication system |
| CN114619962A (en) * | 2022-03-15 | 2022-06-14 | 上海赫千电子科技有限公司 | Automatic driving system with asymmetric transmission |
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Address after: Room 403, block a, 1018 dongsanliqiao Road, Pudong New Area, Shanghai 200125 Patentee after: Heqian Automotive Technology (Shenzhen) Co.,Ltd. Country or region after: China Address before: Room 403, block a, 1018 dongsanliqiao Road, Pudong New Area, Shanghai 200125 Patentee before: SHANGHAI HINGE ELECTRONIC TECHNOLOGIES Co.,Ltd. Country or region before: China |