A vehicle-mounted terminal for highland environment

Abstract

The application provides a vehicle-mounted terminal for a plateau environment, comprising: a shell internally provided with a cavity, a CAN transceiver arranged in the cavity, a micro control unit in communication connection with the CAN transceiver, a global satellite navigation system module, a real-time clock module and a microprocessor in communication connection with the micro control unit respectively, and a hardware encryption module, a storage module and a mobile communication module in communication connection with the microprocessor respectively. The vehicle-mounted terminal for the plateau environment can effectively prevent the data packet loss caused by poor cellular network, ensure the completeness and safety of the vehicle basic data and position data collected by the application, and has practical significance for improving the stability of information transmission through the data packet temporary storage in the complex plateau environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle terminal for highland environment. BACKGROUND

[0002] China is a highland country, and the Qinghai-Tibet Plateau is the most representative highland in the world, with an average elevation of more than 4,000 meters, accounting for about one-fourth of the land area of the country, and is truly the "Roof of the World", and is called the "Life Forbidden Zone" by biologists, with an average elevation of more than 4 km, and an area of 2.3 million square kilometers. The cellular network communication base station in the mountainous environment is scarce, and the communication equipment is paralyzed from time to time, and the link interruption signal is not smooth, and many areas are in the communication blind area of China. When some vehicles carrying transportation tasks break down on the way or pass through dangerous sections, a stable communication system becomes extremely important.

[0003] In the related art, the vehicle terminal can transmit real-time data of the vehicle to the remote background server, but when the vehicle is in a highland complex environment, once it enters an area without cellular network, the vehicle terminal will cause the vehicle data to be lost due to the inability to transmit the vehicle data to the background server in real time, thereby affecting the analysis of the vehicle data by the background server, and unable to determine the road conditions of the vehicle, and losing the function of providing a safety warning for the driver. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a vehicle terminal for highland environment to solve the problem of vehicle data loss caused by poor cellular network in highlands in the related art.

[0005] To achieve the above purpose, the present application provides a vehicle terminal for highland environment, which comprises a shell with a cavity inside, a CAN transceiver arranged in the cavity, a micro control unit in communication connection with the CAN transceiver, a global satellite navigation system module, a real-time clock module and a microprocessor in communication connection with the micro control unit respectively, and a hardware encryption module, a storage module and a mobile communication module in communication connection with the microprocessor respectively.

[0006] Optionally, the micro control unit and the global satellite navigation system module are in communication connection through a serial port UART.

[0007] Optionally, the micro control unit and the microprocessor are in communication connection through GPIO, UART, RESET and POWER ON interfaces.

[0008] Optionally, the microprocessor and the hardware encryption module are in communication connection through an SPI interface.

[0009] Optionally, the vehicle terminal further comprises at least one interaction module electrically connected with the microprocessor.

[0010] Optionally, the interaction module comprises a LED light which is arranged outside the shell.

[0011] Optionally, the shell is embedded with a USB interface which is electrically connected with the microprocessor.

[0012] Optionally, the vehicle terminal further comprises an alarm button which is electrically connected with the micro control unit and arranged on the shell.

[0013] Optionally, the vehicle terminal further comprises a power management module which is electrically connected with the vehicle power supply and the micro control unit.

[0014] Optionally, the vehicle terminal further comprises a backup battery which is electrically connected with the power management module, and a solar panel which is electrically connected with the backup battery and arranged on the top of the shell.

[0015] As can be seen from the above, the vehicle terminal for highland environment provided by the application can collect vehicle basic data through the CAN transceiver, and provide data support for the analysis of road conditions by the remote background server. The vehicle can be positioned through the global satellite navigation system module to obtain accurate vehicle position data. The microprocessor can package and combine the collected vehicle basic data and vehicle position data into a data packet according to the format that can be parsed by the background server. In the highland environment without cellular network, the microprocessor can temporarily store the data packet in the storage module, and then send the data packet to the background server through the mobile communication module when the vehicle drives to an environment with good cellular network. In this way, the loss of data packets due to poor cellular network can be effectively prevented, and the completeness and safety of the vehicle basic data and position data collected by the application can be ensured. In the complex highland environment, the data packet temporary storage method can improve the stability of information transmission, which has practical significance. When the vehicle is about to enter or has entered the dangerous road section recorded by the background server, the background server can send warning information to one or more applications through the Beidou short message, even if there is no cellular network in the current environment, so as to realize the safety warning to the driver. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0017] Figure 1 Fig. 1 is a schematic diagram of a hardware structure of a vehicle terminal for a plateau environment according to an embodiment of the present application;

[0018] Figure 2 Fig. 1 is a schematic diagram of a hardware structure of a vehicle terminal for a plateau environment according to an embodiment of the present application;

[0019] Figure 3 Fig. 1 is a schematic diagram of a hardware structure of a vehicle terminal for a plateau environment according to an embodiment of the present application;

[0020] Legend of reference signs:

[0021] 1, shell; 2, interaction module; 3, alarm button; 4, solar panel; 5, USB interface. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to specific embodiments and drawings.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings understood by those skilled in the art to which the present application belongs. The words "first", "second" and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different components. The words "including" or "containing" and similar words mean that the components or objects before the words cover the components or objects listed after the words and their equivalents, without excluding other components or objects. The words "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The words "up", "down", "left", "right" and the like only represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0024] For the analysis of road conditions, a large amount of vehicle data and driver behavior data on the road are needed. The relatively mature cellular communication technology has the advantages of fast communication rate, stable data transmission and large single packet data volume, which can ensure the real-time data transmission. However, the transmission of the cellular network depends on a large number of base station construction and maintenance. For the vast plateau complex environment in China, if the base station is fully covered, it will consume a lot of manpower, material resources and financial resources, which is not practical for the plateau and mountainous areas with few vehicles and personnel. Moreover, the communication equipment such as base station in the plateau and mountainous area is easy to be damaged, and the maintenance is extremely difficult. Once the communication is interrupted, the vehicle terminal in the coverage range of the base station cannot complete the communication task through the cellular network, and the vehicle terminal cannot provide warning for the driver when the vehicle encounters dangerous road conditions, and the driver will also be in a difficult situation when the vehicle encounters a breakdown.

[0025] Using a mobile phone wireless ad hoc network to build a small range emergency communication system can realize one-to-one or one-to-many communication of voice and text, but it cannot guarantee the smoothness of the transmission link and the reliability of data transmission.

[0026] Compared with conventional communication technology, satellite communication technology is not affected by natural disasters and complex mountains and mines, and there is no communication blind area, and the stability is high. However, the communication rate of Beidou short message is low and the single packet transmission data byte is small, and it is not realistic to transmit a large amount of data information such as vehicle data and driver behavior data through Beidou short message.

[0027] Therefore, as shown in Figure 1 and Figure 2 , the vehicle terminal for plateau environment provided by the embodiments of the present application comprises: a shell 1 internally provided with a cavity, a CAN transceiver arranged in the cavity, a micro control unit in communication connection with the CAN transceiver, a global satellite navigation system module, a real-time clock module and a microprocessor respectively in communication connection with the micro control unit, and a hardware encryption module, a storage module and a mobile communication module respectively in communication connection with the microprocessor.

[0028] For example, as shown in Figure 1The CAN transceiver is connected with the CAN controller of the micro control unit (MCU) through TX / RX communication, converts the data provided by the CAN controller into electrical signals, and then sends the data through the data bus. Meanwhile, the CAN transceiver can also receive the data on the bus and transmit the received data to the CAN controller. The CAN transceiver in the vehicle terminal of the embodiment can be a vehicle network CAN transceiver, which is a single integrated circuit combining a CAN data transmitter and a data receiver. The vehicle network CAN transceiver can be divided into two categories: independent type and combined type. The independent type vehicle network CAN transceiver is flexible in application and can be connected with various CAN controllers. The combined type vehicle network CAN transceiver is usually combined with the CAN controller to form a CAN controller assembly with CAN transceiving function. The CAN transceiver in the vehicle terminal of the embodiment can use IFX1040SJ chip.

[0029] For example, the global satellite navigation system module can include at least one of the U.S. GPS system, the Chinese BDS system, the Russian GLONASS system and the EU GALILEO system, or an integrated module of all the above satellite navigation systems and their enhanced systems. In other words, the global satellite navigation system module can be a system module integrated by multiple satellite navigation positioning systems and their enhanced systems. The global satellite navigation system is a satellite-based radio navigation system using artificial satellites as navigation stations, which provides all-weather and high-precision position information and speed information for various military and civilian carriers on land, sea, air and space. Among them, the Beidou satellite navigation system has a two-way communication function and can complete message reception and sending. The global satellite navigation system in the vehicle terminal of the embodiment can be an LXRF501 chip, which is a highly integrated GNSS / RDSS chip with multi-mode and multi-frequency transceiving functions.

[0030] For example, the real-time clock module (RTC) uses a high-precision crystal oscillator as a clock source, which can provide an accurate time reference for the vehicle terminal of the embodiment. The real-time clock module in the vehicle terminal of the embodiment can be powered by an independent power supply to continue working when the main power supply is powered off. The real-time clock module of the embodiment can be an SD8804 chip.

[0031] For example, the micro control unit (MCU) can be a Freescal MPC5604B chip.

[0032] For example, the microprocessor (MPU) can be a Freescal i.MX6 single chip microcomputer based on Cortex A9 core.

[0033] For example, the hardware encryption module can use LKT2107M chip.

[0034] Exemplarily, the storage module (embedded Multi Media Card, EMMC for short) can adopt KLM8G1GEND-B031 chip. Multi Media Card, MMC for short, is a Flash Memory Card standard, which defines the architecture of MMC and the interface and protocol for accessing Flash Memory. In the vehicle terminal of the embodiment, the storage module can store data that fails to be successfully sent in real time through the mobile communication module, and vehicle data for a preset time length (e.g., 8 days). The vehicle data can include vehicle basic data such as engine speed and throttle opening degree, and vehicle position data, which can be used for vehicle troubleshooting when the vehicle fails.

[0035] Exemplarily, the mobile communication module (LTE Modem) can be ME909S-821 chip. It should be noted that, in the embodiment, the microprocessor and the mobile communication module are integrated into the same module, but Figure 1 only for the hardware schematic diagram of the vehicle terminal of the embodiment, and is not intended to limit the hardware structure of the vehicle terminal of the embodiment. Figure 1

[0036] As shown in FIGS. 1 and 2, in use, the CAN transceiver in the vehicle terminal of the embodiment collects vehicle basic data such as vehicle VIN, vehicle speed, engine speed, gear information, throttle opening degree information, steering wheel angle, and vehicle fault code, and transmits the collected vehicle basic data to the micro control unit. The global satellite navigation system module can transmit the position data of the vehicle to the micro control unit. The micro control unit transmits the vehicle basic data and the position data to the microprocessor after receiving them. The microprocessor packages and combines the received vehicle basic data and position data according to a pre-agreed protocol standard to form a data packet. Then, the microprocessor transmits the data packet to the hardware encryption module for encryption, so as to ensure the integrity and security of the data packet when it is transmitted to the remote background server, and prevent the accuracy of road condition analysis by the background server from being affected due to data tampering. After the hardware encryption module completes the encryption of the data packet, the encrypted data packet is transmitted back to the microprocessor. Figure 1 Figure 3

[0037] ​​​Afterwards, the vehicle terminal of the embodiment checks the current cellular network where the vehicle is located through the microprocessor and the mobile communication module. If the vehicle is currently in a plateau environment with good cellular network, the microprocessor can transmit the encrypted data packet to the remote background server through the mobile communication module via the cellular network. The background server decrypts and analyzes the data packet after receiving it, and records the data analysis result. If the vehicle is currently in a plateau environment with poor cellular network or even no cellular network signal, the microprocessor can first transmit the data packet to the storage module for temporary storage, and then retrieve the data packet in the storage module and send it to the background server when the vehicle drives to an environment where data transmission through the cellular network is possible. When a data packet is sent, the vehicle terminal of the embodiment can detect whether the vehicle is currently turned off through the CAN transceiver. If the vehicle has not been turned off, the above process can be repeated.

[0038] The background server can determine the road condition of the location by analyzing the received vehicle basic data and location data, and can mark the location as a dangerous section and record it when the road condition of the location is poor. When other vehicles drive to the section, the background server can send warning information to one or more vehicle terminals of the embodiment through the cellular network or Beidou short message according to the historical record, so as to remind the driver that the vehicle is about to enter or has entered the dangerous section and pay attention to safe driving.

[0039] For example, the structure and definition of the data packet are shown in Table 1.

[0040] Table 1 Data packet structure and definition

[0041]

[0042] The command unit code, type and definition in the data packet are shown in Table 2.

[0043] Table 2 Command unit definition

[0044] Encoding Definition Direction 0x01 Vehicle login Upward 0x02 Real-time information reporting Upward 0x03 Supplemental information reporting Upward 0x04 Vehicle logout Upward

[0045] The data unit format and definition in the data packet are shown in Table 3.

[0046] Table 3 Data unit format and definition

[0047] Data item Data type Data length (BYTE) Vehicle speed WORD 2 Engine speed WORD 2 Gear BYTE 1 Throttle opening WORD 2 Steering wheel angle DWORD 4 Positioning status BYTE 1 Longitude DWORD 4 Latitude DWORD 2 Cumulative mileage DWORD 4

[0048] In addition, the background server can remotely configure the upload frequency of the vehicle terminal of the embodiment, so as to obtain and analyze the condition of the road where the vehicle drives in real time.

[0049] The vehicle terminal for highland environment provided by the embodiment can collect vehicle basic data through the CAN transceiver, and provide data support for the remote background server to analyze the road conditions. The global satellite navigation system module can be used to locate the vehicle and obtain accurate vehicle position data. The microprocessor can package and combine the obtained vehicle basic data and vehicle position data into a data packet in a format that can be parsed by the background server. In the highland environment without cellular network, the microprocessor can temporarily store the data packet in the storage module, and then send the data packet to the background server through the mobile communication module when the vehicle drives to an environment with good cellular network. In this way, the loss of data packets due to poor cellular network can be effectively prevented, and the vehicle basic data and position data collected by the vehicle terminal of the embodiment can be ensured to be complete and safe. For the complex highland environment, the data packet temporary storage method can improve the stability of information transmission, which has practical significance. When the vehicle is about to enter or has entered the dangerous road section recorded by the background server, even if there is no cellular network in the current environment, the background server can send warning information to one or more vehicle terminals of the embodiment through the Beidou short message, so as to realize the safety warning to the driver.

[0050] As shown in Figure 1 , in some embodiments, the micro control unit and the global satellite navigation system module are connected through a serial port UART. The micro control unit can receive the vehicle position information provided by the global satellite navigation system module through the serial port UART, and receive the warning information sent by the background server through the Beidou short message in the environment with poor cellular network.

[0051] As shown in Figure 1 , in some embodiments, the micro control unit and the microprocessor are connected through GPIO, UART, RESET and POWER ON interfaces. The micro control unit can detect the state of the microprocessor through the GPIO interface. The vehicle basic data and vehicle position data received by the micro control unit can be sent to the microprocessor through the serial port UART, and then transmitted to the remote background server through the cellular network by the mobile communication module. When the micro control unit detects that the microprocessor is down, the microprocessor can be reset through the RESET interface.

[0052] As shown in Figure 1As shown, in some embodiments, the microprocessor and the hardware encryption module are connected in communication through an SPI interface. The microprocessor can transmit a data packet to be encrypted to the hardware encryption module through the SPI interface, and after the hardware encryption module encrypts the data packet, the encrypted data packet is returned to the microprocessor for subsequent storage or sending work. The connection and interaction of the microprocessor with the hardware encryption module through the SPI interface can improve the encryption rate of the data packet. As an example, the hardware encryption module stores a unique serial number, and a DES encryption algorithm and a secret key are selected. When the data packet needs to be encrypted, the encryption algorithm can be used for encryption, and two-way authentication is used to ensure the secure transmission of the data packet.

[0053] As shown in the Figure 2 As shown, in some embodiments, the vehicle terminal further comprises at least one interaction module 2 electrically connected to the microprocessor. The interaction module 2 can be a display screen, a touch screen, an LED lamp, etc. The vehicle driver can obtain the information sent by the vehicle terminal of the embodiment through the interaction module 2, for example, through the text or animation information displayed on the display screen or the state change (such as color change or brightness change, etc.) of the LED lamp to know whether the cellular network of the current vehicle environment is available, whether the global satellite navigation system is normally used, and whether the current vehicle environment is a dangerous section, etc.

[0054] As shown in the Figure 2 As shown, in some embodiments, the interaction module 2 comprises an LED lamp with a light-emitting side outside the shell 1. The LED lamp can be controlled by the microprocessor to display information through color change or brightness change. The LED lamp can be fixed through the through hole provided on the shell 1, and the light-emitting side of the LED lamp faces the outside of the shell 1 or protrudes out of the shell 1, and the other side can be connected to the microprocessor through an electric connecting line or the like.

[0055] As shown in the Figure 2 As shown, in some embodiments, the shell 1 is embedded with a USB interface 5, and the USB interface 5 is electrically connected to the microprocessor. The USB interface 5 is mainly used for software updating and fault querying of the vehicle terminal of the embodiment by the developer.

[0056] As shown in the Figure 2 As shown, in some embodiments, the vehicle terminal further comprises an alarm button 3 electrically connected to the microprocessor, and the alarm button 3 is arranged on the shell 1. The alarm button 3 is a mechanical button with high reliability, and the triggering mode can be a pressing trigger, and is fixed through the through hole provided on the shell 1. When the alarm button 3 is triggered, a Beidou short message can be sent through the global satellite navigation system module to transmit the information of encountering danger to the background server to seek help.

[0057] In addition, the trigger area of the alarm button 3 can be set to be larger, and a prominent "SOS" mark is set, so that the driver can quickly and accurately trigger when encountering danger.

[0058] As shown in FIG. Figure 1 In some embodiments, the vehicle terminal further comprises a power management module (PMU) capable of being electrically connected with the vehicle power supply, and the PMU is electrically connected with the micro control unit. The PMU can adopt a TPS65251RHAR chip, which cooperates with the micro control unit to monitor the connection status of the vehicle power supply, control the power supply for the aforementioned modules, and adjust the real-time clock module, etc.

[0059] As shown in FIG. Figure 1 and Figure 2 In some embodiments, the vehicle terminal further comprises a backup battery electrically connected with the PMU, and the top of the outer side of the shell 1 is provided with a solar panel 4 electrically connected with the backup battery. The backup battery can be a storage battery. In the dry and cloudy environment of the plateau area, the solar panel 4 can on the one hand charge the backup battery with sufficient solar energy, and on the other hand shield the top of the shell 1 through the solar panel 4, so as to avoid the high temperature inside the shell 1 caused by long-time sunlight in the plateau environment from affecting the normal use of the aforementioned modules.

[0060] Each of the embodiments in the present application is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0061] The description in the present application is given for example and description, and is not exhaustive or limits the present application to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

[0062] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to limit the scope of the present application (including claims) to these examples; the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in detail.

[0063] Embodiments of the application are intended to embrace all such alterations, modifications, and variations that fall within the broad scope of the appended claims. Accordingly, any one or more features of a given embodiment are not mandatory except where the claims expressly state otherwise.

Claims

1. A vehicle terminal for a highland environment, characterized by comprising: The application relates to a vehicle-mounted terminal. The vehicle-mounted terminal comprises a shell provided with a cavity, a CAN transceiver arranged in the cavity, a micro control unit in communication connection with the CAN transceiver, a global satellite navigation system module, a real-time clock module and a microprocessor in communication connection with the micro control unit respectively, and a hardware encryption module, a storage module and a mobile communication module in communication connection with the microprocessor respectively. The micro control unit transmits the vehicle basic data and the position data to the microprocessor, the microprocessor can pack and combine the obtained vehicle basic data and vehicle position data into a data packet according to a format that can be parsed by a background server, the microprocessor can temporarily store the data packet in the storage module in a plateau environment without a cellular network, and the data packet is sent to the background server through the mobile communication module when the vehicle runs in an environment with good cellular network; when the vehicle passes through a dangerous section, the background server sends warning information to the vehicle-mounted terminal through a cellular network or a Beidou short message.

2. The vehicle terminal for high altitude environment according to claim 1, wherein The micro control unit is in communication connection with the global satellite navigation system module through a serial port UART.

3. The vehicle terminal for high altitude environment according to claim 1, wherein The micro control unit is in communication connection with the microprocessor through GPIO, UART, RESET and POWER ON interfaces.

4. The vehicle terminal for high altitude environment according to claim 1, wherein The microprocessor is in communication connection with the hardware encryption module through an SPI interface.

5. The vehicle terminal for high altitude environment according to claim 1, wherein The vehicle-mounted terminal further comprises at least one interactive module in electric connection with the microprocessor.

6. The vehicle terminal for high altitude environment according to claim 5, wherein The interactive module comprises a LED lamp arranged outside the shell.

7. The vehicle terminal for high altitude environment according to claim 1, wherein The shell is embedded with a USB interface in electric connection with the microprocessor.

8. The vehicle terminal for high altitude environment according to claim 1, wherein The vehicle-mounted terminal further comprises an alarm button in electric connection with the micro control unit and arranged on the shell.

9. The vehicle terminal for high altitude environment according to claim 1, wherein The vehicle-mounted terminal further comprises a power management module in electric connection with the vehicle power supply and the micro control unit.

10. The vehicle terminal for high altitude environment according to claim 9, wherein The vehicle-mounted terminal further comprises a backup battery in electric connection with the power management module, and a solar cell panel in electric connection with the backup battery and arranged on the top of the shell.

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