CN114419759A - Vehicle-mounted gateway integrated with event recorder - Google Patents
Vehicle-mounted gateway integrated with event recorder Download PDFInfo
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- CN114419759A CN114419759A CN202210095420.7A CN202210095420A CN114419759A CN 114419759 A CN114419759 A CN 114419759A CN 202210095420 A CN202210095420 A CN 202210095420A CN 114419759 A CN114419759 A CN 114419759A
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- vehicle
- integrated
- power supply
- gateway
- event recorder
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
Abstract
The invention relates to a vehicle-mounted gateway integrated with an event recorder, and belongs to the technical field of vehicle-mounted networks. The gateway comprises at least one host computer, a cache memory, a nonvolatile memory and a power supply module with an energy storage function, wherein the cache memory, the nonvolatile memory and the power supply module are interconnected with a host computing unit; the main computer is connected to other electric control units of the vehicle body through a vehicle-mounted network interface, acquires signals from other electric control units and converts the signals into internal variables carried in an operating system of the main computer; the host computer records and stores the internal variables in the cache memory within a time period. The event recorder integrated in the gateway has higher integration level, reduces the development work of corresponding signal forwarding and has lower cost.
Description
Technical Field
The invention relates to a vehicle-mounted gateway integrated with an event recorder, and belongs to the technical field of vehicle-mounted networks.
Background
With the release of the national standard No. 2 amendment form of motor vehicle operation safety technical conditions, newly produced passenger vehicles need to be equipped with an 'automobile black box' EDR (event recorder) system from 1 month and 1 day of 2022. After the vehicle is equipped with the EDR system, once the vehicle breaks down or has an accident, relevant departments can call the black box data to judge the event. At present, the EDR is mainly integrated in a vehicle-mounted TBOX or is an independent electric control unit, related signals need to be forwarded, the cost is high, the reliability is low, and the reading difficulty is high after a serious accident occurs.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: an in-vehicle gateway integrated with an event recorder is provided.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a vehicle-mounted gateway integrated with an event recorder comprises at least one host computer, a cache memory, a nonvolatile memory and a power supply module with an energy storage function, wherein the cache memory, the nonvolatile memory and the power supply module are interconnected with a host computing unit; the main computer is connected to other electric control units of the vehicle body through a vehicle-mounted network interface, acquires signals from other electric control units and converts the signals into internal variables carried in an operating system of the main computer; the host computer records and stores the internal variables in the cache memory within a time.
The improvement of the technical scheme is as follows: the host computer comprises a state management module, a monitoring module and a storage module.
The improvement of the technical scheme is as follows: the monitoring module carries out calculation processing according to the internal variables, and when a predefined data recording triggering condition is met, the monitoring module informs the storage module to carry out data storage;
the state management module collects the health state of the memory, the states of the host computer and the operating system and the states of the power supply module; when a predefined fault occurs, the state management module sends a fault signal, and the storage module receives the fault signal and stores the current internal variable in the cache memory.
The improvement of the technical scheme is as follows: the internal variables stored in the cache memory are stored in the non-volatile memory after a time window.
The improvement of the technical scheme is as follows: the main computer is connected with other ECUs of the vehicle body through a vehicle-mounted Ethernet and/or a CAN, and the vehicle-mounted gateway is provided with at least two paths of independent power supplies, including one path of main vehicle body power supply and one path of backup power supply;
the energy storage part of the power supply module with the energy storage function is a capacitor or a rechargeable battery.
The improvement of the technical scheme is as follows: the storage control unit comprises data encryption and writing and access authority limiting functions, and at least time information of each writing operation needs to be recorded.
The improvement of the technical scheme is as follows: the nonvolatile memory is integrated in an independent sealed metal shell, the metal box is connected with hardware where the host computer is located through a wiring harness, and the connection wiring harness at least comprises a power line for supplying power to the nonvolatile memory and a bus for completing read-write operation and control instructions;
and an MCU master control is integrated in the metal shell and used for reading the data in the nonvolatile memory, decrypting and transmitting the data through a CAN bus.
The improvement of the technical scheme is as follows: the storage module is used for reading data in the nonvolatile memory.
The invention has the beneficial effects that: the event recorder integrated in the gateway has higher integration level, reduces the development work of corresponding signal forwarding and has lower cost. In order to facilitate independent extraction of data, the data processing system can be designed into a separated memory structure, so that the data can work independently of the gateway, the data stored in the data processing system can be read in a read-only mode and sent to corresponding equipment for analysis, and the data processing system is particularly suitable for recovering and reading data at the first time when an ECU is damaged in a serious accident.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a separated storage structure and a main/standby power supply structure.
Detailed Description
Example one
A vehicle-mounted gateway of this embodiment, as shown in fig. 1, includes at least one host computer, a cache memory interconnected with the host computing unit, a nonvolatile memory, and a power supply module with an energy storage function; the main computer is connected to other electric control units of the vehicle body through a vehicle-mounted network interface, acquires signals from other electric control units and converts the signals into internal variables carried in an operating system of the main computer; the host computer records and stores the internal variables in the cache memory within a time.
The host computer comprises a state management module, a monitoring module and a storage module.
The monitoring module carries out calculation processing according to the internal variables, and when a predefined data recording triggering condition is met, the monitoring module informs the storage module to carry out data storage;
the state management module collects the health state of the memory, the states of the host computer and the operating system and the states of the power supply module; when a predefined fault occurs, the state management module sends a fault signal, and the storage module receives the fault signal and stores the current internal variable in the cache memory.
The internal variables stored in the cache memory are stored in the non-volatile memory after a time window.
The storage module is used for reading data in the nonvolatile memory.
The host computer is an MCU or an MPU, the cache memory is a DDR memory, and the nonvolatile memory is an eMMC, a NAND flash or a solid state disk.
The energy storage part of the power supply module with the energy storage function is a capacitor or a rechargeable battery, and the capacitor or the rechargeable battery can independently maintain the energy consumption requirement that the main control unit and the storage unit complete data recording for at least 200 ms.
The time window (T)pre) Length of at least 150ms, said time window (T)post) The length is at least 150 ms.
The storage control unit is integrated with data encryption and writing and access authority limiting functions and at least needs to record time information of each writing operation.
The non-volatile memory is integrated in an independent sealed metal shell, the metal box is connected with hardware where the host computer is located through a wiring harness, and the connection wiring harness at least comprises a power line for supplying power to the non-volatile memory and a bus for completing read-write operation and control instructions.
And an MCU master control is integrated in the metal shell and CAN read data in the nonvolatile memory, decrypt the data and send the data through a CAN bus.
The vehicle-mounted gateway is connected with other ECUs of the vehicle body through a vehicle-mounted Ethernet and/or a CAN, and the central gateway is provided with at least two paths of independent power supplies, including one path of main vehicle body power supply and one path of backup power supply.
The vehicle-mounted gateway is a regional gateway, the regional gateway is connected with a central gateway or a central computing unit through a vehicle-mounted Ethernet, and the regional gateway is provided with at least two paths of independent power supplies, including one path of main vehicle body power supply and one path of backup power supply. As shown in fig. 2, the nonvolatile memory is an independent hardware unit, and is sealed in an independent metal shell, the metal shell has the characteristics of shock resistance, dust resistance, water resistance, fire resistance and the like, the memory is connected to the gateway through a wiring harness, and the connection wiring harness includes a power line for supplying power to the nonvolatile memory and a bus for completing read-write operation and control instructions. Wherein the gateway has two power supply inputs: the energy storage unit in the gateway can provide power for the main computing unit and the memory for an additional period of time when the power supply is powered off, so that the main computing unit and the memory still have data recording capacity within a designed time period after the power supply is powered off and complete storage of corresponding data.
Claims (8)
1. An on-vehicle gateway of integrated incident recorder which characterized in that: the system comprises at least one host computer, a cache memory, a nonvolatile memory and a power supply module with an energy storage function, wherein the cache memory, the nonvolatile memory and the power supply module are interconnected with a host computing unit; the main computer is connected to other electric control units of the vehicle body through a vehicle-mounted network interface, acquires signals from other electric control units and converts the signals into internal variables carried in an operating system of the main computer; the host computer records and stores the internal variables in the cache memory within a time.
2. The event recorder integrated in-vehicle gateway of claim 1, wherein: the host computer comprises a state management module, a monitoring module and a storage module.
3. The event recorder integrated in-vehicle gateway of claim 2, wherein: the monitoring module carries out calculation processing according to the internal variables, and when a predefined data recording triggering condition is met, the monitoring module informs the storage module to carry out data storage;
the state management module collects the health state of the memory, the states of the host computer and the operating system and the states of the power supply module; when a predefined fault occurs, the state management module sends a fault signal, and the storage module receives the fault signal and stores the current internal variable in the cache memory.
4. The event recorder integrated in-vehicle gateway of claim 3, wherein: the internal variables stored in the cache memory are stored in the non-volatile memory after a time window.
5. The event recorder integrated in-vehicle gateway of claim 4, wherein: the main computer is connected with other ECUs of the vehicle body through a vehicle-mounted Ethernet and/or a CAN, and the vehicle-mounted gateway is provided with at least two paths of independent power supplies, including one path of main vehicle body power supply and one path of backup power supply;
the energy storage part of the power supply module with the energy storage function is a capacitor or a rechargeable battery.
6. The event recorder integrated in-vehicle gateway of claim 5, wherein: the storage control unit comprises data encryption and writing and access authority limiting functions, and at least time information of each writing operation needs to be recorded.
7. The event recorder integrated in-vehicle gateway of claim 6, wherein: the nonvolatile memory is integrated in an independent sealed metal shell, the metal box is connected with hardware where the host computer is located through a wiring harness, and the connection wiring harness at least comprises a power line for supplying power to the nonvolatile memory and a bus for completing read-write operation and control instructions;
and an MCU master control is integrated in the metal shell and used for reading the data in the nonvolatile memory, decrypting and transmitting the data through a CAN bus.
8. The event recorder integrated in-vehicle gateway of claim 2, wherein: the storage module is used for reading data in the nonvolatile memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210095420.7A CN114419759A (en) | 2022-01-26 | 2022-01-26 | Vehicle-mounted gateway integrated with event recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210095420.7A CN114419759A (en) | 2022-01-26 | 2022-01-26 | Vehicle-mounted gateway integrated with event recorder |
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| Publication Number | Publication Date |
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| CN114419759A true CN114419759A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210095420.7A Pending CN114419759A (en) | 2022-01-26 | 2022-01-26 | Vehicle-mounted gateway integrated with event recorder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115277764A (en) * | 2022-07-19 | 2022-11-01 | 岚图汽车科技有限公司 | Vehicle-mounted Ethernet physical layer conversion equipment and vehicle thereof |
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2022
- 2022-01-26 CN CN202210095420.7A patent/CN114419759A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115277764A (en) * | 2022-07-19 | 2022-11-01 | 岚图汽车科技有限公司 | Vehicle-mounted Ethernet physical layer conversion equipment and vehicle thereof |
| CN115277764B (en) * | 2022-07-19 | 2023-10-31 | 岚图汽车科技有限公司 | Vehicle-mounted Ethernet physical layer conversion equipment and vehicle thereof |
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