An automatic driving data recorder

Abstract

The utility model discloses an automatic driving data recorder, which belongs to the field of automobile automatic driving technology. It includes: MCU, storage unit, power management module and capacitor module; the MCU and the storage unit are connected to each other, and the MCU is used to receive the data signal that needs to be stored, and transmit it to the storage unit for storage; the power management module is connected to the MCU and the capacitor module at the same time, and is connected to an external power supply. The utility model realizes the recording of automatic driving data by directly connecting the MCU to the EMMC chip. At the same time, due to the low power consumption of the MCU, a large capacitor can be used to ensure that the MCU can continue to work for a period of time even when the power is cut off, which is enough for the MCU to save the data at the time of the accident to the EMMC, thereby achieving low cost, low power consumption and high stability.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile automatic driving, and in particular to an automatic driving data recorder. Background Art

[0002] With the popularization of intelligent driving and the implementation of the L3 level of autonomous driving planning, the determination of responsibility for vehicle accidents will become a very important issue. Because above the L3 level of autonomous driving, vehicle manufacturers need to be responsible for the results of the vehicle's autonomous driving. In order to avoid difficulties in determining responsibility after an accident, the country plans to formulate the relevant national standard "Intelligent and connected vehicle-Data storage system for automateddriving" (DSSAD for short), requiring vehicles with L3 and above autonomous driving to record data related to collision events during the operation of autonomous driving, so that the scene of the accident can be truly restored after the accident occurs.

[0003] At present, some OEMs will consider integrating the functions of DSSAD into the autonomous driving control system. Since the autonomous driving control system has powerful computing power, it is more than enough to allocate a part of the computing power to record data. However, according to national standards, DSSAD needs to meet a series of stringent requirements such as resistance to falling, waterproofing, dustproofing, high temperature resistance, electromagnetic interference resistance, and the ability to save collision time data after power failure. If these requirements are fully implemented on the autonomous driving domain controller, the shell requirements, radiation requirements, and energy storage requirements of the autonomous driving domain controller will be a considerable challenge and a huge increase in cost.

[0004] DSSAD requires recording of at least one image or video data from a forward-looking camera. For big data processing, SOC solutions are usually used for video recording, but SOC generally consumes a lot of power and is relatively expensive. In order to save data after a power outage, the SOC needs to be equipped with a battery management system to cope with the situation after a power outage, and the battery is prone to explosion at high temperatures. This solution is costly and unsafe. Therefore, a low-cost, high-stability solution is urgently needed to support DSSAD. Summary of the invention

[0005] In view of the defects of the prior art, the utility model provides a low-cost, low-power, and high-stability autonomous driving data recorder. The pictures or videos are received through the Ethernet interface of the MCU and saved on the EMMC chip. At the same time, a large capacitor is used to ensure that the MCU can continue to work for a period of time even when the power is cut off, so as to support data storage at the time of the accident.

[0006] In order to achieve the above-mentioned object, the utility model provides an automatic driving data recorder, including: an MCU, a storage unit, a power management module and a capacitor module;

[0007] The MCU and the storage unit are connected to each other, and the MCU is used to receive the data signal to be stored and transmit it to the storage unit for storage;

[0008] The power management module is connected to the MCU and the capacitor module at the same time, and is connected to an external power source.

[0009] Furthermore, the power module supplies power to the MCU through the external power supply and charges the capacitor module at the same time; after the external power supply is powered off, the capacitor module discharges and supplies power to the MCU.

[0010] Furthermore, the storage unit is an EMMC chip.

[0011] Furthermore, the MCU receives the data signal through an Ethernet port and a CAN port.

[0012] Furthermore, it also includes a high temperature resistant protective shell arranged outside the autonomous driving data recorder, the autonomous driving data recorder is placed in the center of the high temperature resistant protective shell, and flame retardant material is filled between the autonomous driving data recorder and the high temperature resistant protective shell.

[0013] The beneficial effects of the new use:

[0014] The utility model directly connects the EMMC chip through the MCU to realize the recording of the automatic driving data, and the power consumption is low. At the same time, due to the low power consumption of the MCU, a large capacitor can be used to ensure that the MCU can maintain working for a period of time even when the power is cut off, which is enough for the MCU to save the data at the time of the accident to the EMMC, with low cost and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a block diagram of the automatic driving data recorder module of the utility model.

[0016] Figure 2 It is a mechanical structure diagram of the automatic driving data recorder of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, the utility model provides an automatic driving data recorder, including: an MCU, a storage unit (EMMC chip), a power management module and a capacitor module.

[0019] The MCU and the storage unit are connected to each other, and the power management module is connected to the MCU and the capacitor module at the same time, and is connected to an external power supply.

[0020] Among them, MCU receives the data signal that needs to be stored through the Ethernet port and CAN port, and transmits it to the EMMC for data storage.

[0021] The power management module supplies power to the MCU and charges the capacitor module when the external power supply is on. When the external power supply is off, the receiving capacitor module discharges and supplies power to the MCU. Due to the low power consumption of the MCU, the large capacitor method can ensure that the MCU can continue to work for a period of time even when the power is cut off, which is enough for the MCU to save the data at the time of the accident to the EMMC. At the same time, the large capacitor can work normally in the temperature range of -55℃ to 105℃, which can support the high temperature resistance requirements of the autonomous driving data recorder.

[0022] like Figure 2 As shown in the figure, the autonomous driving data recorder (PCB body) is also provided with a high temperature resistant protective shell. The autonomous driving data recorder is placed in the middle of the shell, and the space between it and the high temperature resistant protective shell is filled with flame retardant material to minimize the damage to the autonomous driving data recorder caused by high temperature. The autonomous driving data recorder is connected to the vehicle wiring harness through the only hole in the high temperature resistant protective shell by a wire harness. The purpose of this is to minimize the exposure of the autonomous driving data recorder to the outside world and improve the fire resistance and waterproof performance.

[0023] The utility model designs a safe, reliable and stable automatic driving data recording system. The temperature resistance of the product is ensured by adding flame retardant materials. The instability of the system under high and low temperatures is reduced by replacing batteries with capacitors. The system strives to maintain a relatively good working condition even in extremely harsh environments.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic driving data recorder, characterized in that: include: MCU, storage unit, power management module and capacitor module; The MCU and the storage unit are connected to each other, and the MCU is used to receive the data signal to be stored and transmit it to the storage unit for storage; The power management module is connected to the MCU and the capacitor module at the same time, and is connected to an external power source.

2. The automatic driving data recorder according to claim 1, characterized in that: The power management module supplies power to the MCU through the external power supply and charges the capacitor module at the same time; after the external power supply is powered off, the capacitor module discharges and supplies power to the MCU.

3. The automatic driving data recorder according to claim 1, characterized in that: The storage unit is an EMMC chip.

4. The automatic driving data recorder according to claim 1, characterized in that: The MCU receives the data signal through the Ethernet port and the CAN port.

5. The automatic driving data recorder according to claim 1, characterized in that: It also includes a high temperature resistant protective shell arranged outside the automatic driving data recorder, the automatic driving data recorder is placed in the center of the high temperature resistant protective shell, and flame retardant material is filled between the automatic driving data recorder and the high temperature resistant protective shell.

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