Automobile event data recording system and automobile event data recorder

Abstract

The utility model relates to the field of vehicle-mounted monitoring equipment, and discloses an automobile event data recording system and an automobile event data recorder. The automobile event data recording system comprises an inertial sensor, a control module, a memory, a power supply module and a connector, an event data recording system is separated from a safety airbag system, an independently running EDR hardware platform is established, the connector is connected with an automobile power supply to supply power to hardware in the system, the power supply module serves as a standby power supply, and when power failure is caused by adverse conditions such as collision events of an automobile, the power supply module provides emergency power supply; therefore, reliable operation of the system is ensured, and coverage of a collision event data writing period and data integrity is ensured; the system can be flexibly deployed on platforms of different vehicle types, does not need to be forcibly upgraded due to iteration of the safety airbag system, and is low in manufacturing and using cost, better in compatibility and higher in practicability.

Description

Technical Field

[0001] This utility model relates to the field of vehicle monitoring equipment, specifically to a vehicle event data recording system and a vehicle event data recorder. Background Technology

[0002] All newly manufactured passenger vehicles are equipped with a compliant EDR (Event Data Recorder) system. An automotive event data recording system consists of one or more onboard electronic modules and is a device or system that monitors, collects, and records data from vehicle and occupant protection systems before, during, and after a collision event. It can be used not only for analyzing the causes of road traffic accidents and assessing the functionality of vehicle safety systems during an accident, but also for research and development improvements by automobile manufacturers and for confirming insurance claims by insurance companies. In related technologies, the event recording function is often integrated into the airbag system, which results in high actual manufacturing and usage costs, reduced flexibility in operational scenarios, and low practicality. Utility Model Content

[0003] In view of this, the present invention provides a vehicle event data recording system and a vehicle event data recorder to solve the problems mentioned in the background art.

[0004] In a first aspect, this utility model provides a vehicle event data recording system, comprising:

[0005] The system includes an inertial sensor, a control module, a memory, a power module, and a connector. The inertial sensor is used to measure the lateral and longitudinal acceleration of the vehicle. The inertial sensor is bidirectionally connected to the control module, which is connected to the inertial sensor via an SPI interface. The memory is bidirectionally connected to the control module, and the connector is connected to an external vehicle control system to acquire vehicle information and event data.

[0006] The power module includes a power protection circuit and a backup power circuit. The input terminal of the power protection circuit is connected to the connector, the output terminal of the power protection circuit is connected to the input terminal of the backup power circuit, and the output terminal of the backup power circuit is connected to the control module.

[0007] Beneficial effects: By measuring the vehicle's lateral and longitudinal acceleration through inertial sensors, and connecting to the external vehicle control system via a connector, vehicle information and event data are acquired and fed back to the control module for storage in memory. This application separates the event data recording system from the airbag system, establishing an independently operating EDR hardware platform. A connector connects to the vehicle's power supply to power the hardware within the system. The power module serves as a backup power source, providing emergency power in case of power failure due to adverse conditions such as a collision, ensuring reliable system operation and guaranteeing coverage of the collision event data writing cycle and data integrity. This application can be flexibly deployed on different vehicle platforms without requiring mandatory upgrades due to airbag system iterations, resulting in lower manufacturing and usage costs, better compatibility, and higher practicality.

[0008] In one optional implementation, the vehicle event data recording system further includes a base chip, the power supply input terminal of which is connected to the connector, and the power supply output terminal of which is connected to the input terminal of the power protection circuit; the base chip and the connector are also bidirectionally connected via a CAN line, and the base chip and the control module are bidirectionally connected via at least an SPI interface.

[0009] Beneficial effects: On the one hand, using the base chip as a front-end power hub to receive power from the vehicle's power supply and convert it to output a stable voltage to the power protection circuit can eliminate the losses from multi-stage conversion. On the other hand, the base chip communicates with the vehicle system through the CAN line and connector to collect dynamic data such as vehicle speed and steering angle, which helps reduce signal delay. It is also directly connected to the control module through an independent SPI channel to ensure physical isolation between data and control commands, prevent data packet loss caused by bus conflicts, and feed the data back to the memory through the control module. The base chip provided in this application helps reduce hardware costs, optimize power management efficiency, and improve the real-time performance of communication.

[0010] In one alternative implementation, the connector includes I / O input lines, the outputs of which are connected to the control module and the base chip, respectively.

[0011] Beneficial effects: On the control module side, IO signals are directly transmitted to the control module for event triggering and judgment, reducing response latency and improving recording accuracy; on the base chip side, IO signals can be synchronously input to the base chip for power status linkage, which helps to improve the accuracy of system power consumption management.

[0012] In one optional implementation, the vehicle event data recording system further includes a Bluetooth module, which is bidirectionally connected to the control module, and the power input terminal of the Bluetooth module is connected to the output terminal of the backup power circuit.

[0013] Beneficial effects: The Bluetooth module assists the control module in data exchange and can undertake the transmission task, allowing the control module to focus on real-time tasks such as accelerometer data and collision event data measured by the inertial sensor. This design can optimize the allocation of computing resources, enhance data reliability, and reduce the cost of selecting the control module.

[0014] In one alternative implementation, the vehicle event data recording system further includes a built-in antenna connected to the Bluetooth module.

[0015] Beneficial effects: This application integrates a built-in antenna into the Bluetooth module to wirelessly export event data via the Bluetooth transmission protocol, eliminating the need for OBD-II interface connection harnesses and protocol conversion modules, thus reducing hardware costs; furthermore, the built-in antenna supports concurrent connections from multiple devices, allowing simultaneous connection to mobile terminals and cloud platforms, enabling real-time data distribution and improving response efficiency.

[0016] In one alternative implementation, the memory is a temporary storage device of type FRAM with an SPI interface.

[0017] Beneficial effects: This configuration uses FRAM-type temporary storage, which has the advantages of fast write speed, high durability, and non-dispersibility, ensuring real-time system response, continuous recording of vehicle status, continuous data caching, and cyclic recording of driving behavior data, which is beneficial for supporting accident retrospective analysis; the use of SPI interface can save circuit board space, reduce the occupation of connection pins, and quickly export data through SPI interface, shortening the troubleshooting time.

[0018] In one alternative implementation, the power module is configured as two 5F supercapacitor batteries.

[0019] Beneficial effects: During vehicle operation, the vehicle event data recording system may face frequent starts and stops. The supercapacitor battery can respond quickly, rapidly providing the necessary power at the moment of system startup, ensuring that the system can start recording data in a timely manner. The supercapacitor battery can provide high instantaneous power output, meeting the high power requirements of the vehicle event data recording system for rapid storage and processing of large amounts of data in emergency situations (such as the moment of a vehicle collision), ensuring the integrity and accuracy of data recording, for example, meeting the data recording requirement of 250ms after the zero point of the collision. Furthermore, the supercapacitor battery can serve as an auxiliary power source, providing stable power to the data recording system when the vehicle's power output is unstable, ensuring the normal operation of the system.

[0020] Secondly, this utility model also provides a vehicle event data recorder, including the aforementioned vehicle event data recording system.

[0021] In one optional embodiment, the system further includes an upper shell, a PCBA board, a lower shell, and connectors. The PCBA board is detachably disposed in the cavity formed by the upper shell and the lower shell via a plurality of connectors. The connectors are used to jointly fix the upper shell, the PCBA board, and the lower shell. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram illustrating the working principle of the vehicle event data recording system provided in this embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the structure of the vehicle event data recorder provided in this embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the inertial sensor in the vehicle event data recorder provided in this embodiment of the utility model;

[0026] Figure 4 A schematic diagram showing the connection between the inertial sensor and the control module in an automotive event data recorder provided in this embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the memory in the vehicle event data recorder provided in an embodiment of this utility model;

[0028] Figure 6 A schematic diagram showing the connection between the memory and the control module in an automotive event data recorder provided in an embodiment of this utility model;

[0029] Figure 7 A schematic diagram of the CAN transceiver of the basic chip in the automotive event data recorder provided in this embodiment of the present invention;

[0030] Figure 8 A schematic diagram showing the connection between the CAN transceiver and the control module of the basic chip in the automotive event data recorder provided in this embodiment of the utility model;

[0031] Figure 9 A schematic diagram of the power module in the vehicle event data recorder provided in this embodiment of the utility model;

[0032] Figure 10A schematic diagram of the connector in the vehicle event data recorder provided in this embodiment of the utility model;

[0033] Figure 11 A schematic diagram showing the connection between the Bluetooth module and the control module in an automotive event data recorder provided in an embodiment of this utility model;

[0034] Explanation of reference numerals in the attached figures:

[0035] 101. Inertial sensor; 102. Control module; 103. Memory; 104. Basic chip; 105. Power module; 106. Bluetooth module; 107. Connector; 108. Built-in antenna; 201. Upper shell; 202. PCBA board; 203. Lower shell; 204. Connector. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, in one aspect, an inertial sensor 101, a control module 102, a memory 103, a power module 105, and a connector 107 are provided. The inertial sensor 101 is used to measure the lateral and longitudinal acceleration of a vehicle. The inertial sensor 101 is bidirectionally connected to the control module 102. The control module 102 is connected to the inertial sensor 101 via an SPI interface. The memory 103 is bidirectionally connected to the control module 102. The connector 107 is connected to an external vehicle control system to obtain vehicle information and event data. The power module 105 includes a power protection circuit and a backup power circuit. The input terminal of the power protection circuit is connected to the connector 107, the output terminal of the power protection circuit is connected to the input terminal of the backup power circuit, and the output terminal of the backup power circuit is connected to the control module 102.

[0039] The vehicle event data recording system provided in this embodiment measures the lateral and longitudinal acceleration of the vehicle through an inertial sensor 101 and connects to an external vehicle control system through a connector 107 to acquire vehicle information and event data, which is then fed back to the control module 102 for storage in the memory 103. This application separates the event data recording system from the airbag system, establishing an independently operating EDR hardware platform. The connector 107 connects to the vehicle power supply to power the hardware within the system. The power module 105 serves as a backup power supply, providing emergency power in case of power failure caused by adverse conditions such as a collision, ensuring reliable system operation and guaranteeing coverage of the collision event data writing cycle and data integrity. This application can be flexibly deployed on different vehicle platforms without requiring mandatory upgrades due to airbag system iterations, resulting in lower manufacturing and usage costs, better compatibility, and higher practicality.

[0040] In the specific configuration selection, the inertial sensor 101 adopts an SPI interface SM I 30, with an update speed required to be at least 500Hz. During operation, recording begins when the lateral and longitudinal acceleration reaches 1.5g, and recording is locked when the acceleration reaches 4.7g. For a detailed implementation, see [link to implementation details]. Figure 3 and Figure 4 The 7 / 6 / 5 / 8P IN angles of the inertial sensor 101 correspond to the 66 / 65 / 64 / 63P IN angles of the control module 102, respectively.

[0041] For a specific implementation method, see Figure 5 and Figure 6 The control module 102 uses the FS32K146UAT0VLLT processing chip, and the memory 103 uses the CY15B256Q-SXE flash memory chip. The 1 / 2 / 6 / 5P IN angles of the memory 103 are respectively connected to the 100 / 99 / 94 / 93P IN angles of the control module 102, so as to be used for at least recording acceleration data.

[0042] In one embodiment, the vehicle event data recording system further includes a base chip 104. The power supply input terminal of the base chip 104 is connected to the connector 107, and the power supply output terminal of the base chip 104 is connected to the input terminal of the power protection circuit. The base chip 104 and the connector 107 are also bidirectionally connected via a CAN line, and the base chip 104 and the control module 102 are bidirectionally connected via at least an SPI interface. With this approach, on the one hand, the base chip 104 acts as a front-end power hub, receiving power from the vehicle and converting it to output a stable voltage to the power protection circuit, thus eliminating the losses from multi-stage conversion. On the other hand, the base chip 104 communicates with the vehicle system via the CAN line and the connector 107 to collect dynamic data such as vehicle speed and steering angle, which helps reduce signal delay. It is also directly connected to the control module 102 via an independent SPI channel, ensuring physical isolation between data and control commands, preventing data packet loss due to bus conflicts, and feeding the data back to the memory 103 for storage via the control module 102. The base chip 104 provided in this application helps reduce hardware costs, optimize power management efficiency, and improve the real-time performance of communication.

[0043] For a specific implementation method, see Figure 7 and Figure 8 The basic chip 104 is equipped with a CAN transceiver. The 11 / 1 / 4 / 14 / 6 / 7P IN angles of the CAN transceiver correspond to the 90 / 89 / 88 / 83 / 82 / 62P IN angles of the control module 102, respectively. The CAN transceiver is used to receive CAN signals and feed them back to the control module 102.

[0044] For specific selection, please refer to Figure 9 The power module can use the MPQ9840GLE-AEC power chip.

[0045] In one embodiment, connector 107 includes I / O input lines, the outputs of which are connected to control module 102 and base chip 104, respectively. With this approach, for control module 102, the I / O signals are directly transmitted to control module 102 for event triggering judgment, reducing response latency and improving recording accuracy; for base chip 104, the I / O signals can be synchronously input to base chip 104 for power status linkage, which helps improve the accuracy of system power consumption management.

[0046] For specific selection, please refer to Figure 10 Connector 107 uses a combination of PESD24VF1 BLYL and NTDV20P06LT4G-VF01.

[0047] In one embodiment, the vehicle event data recording system further includes a Bluetooth module 106, which has a bidirectional communication connection with the control module 102. The power input terminal of the Bluetooth module 106 is connected to the output terminal of the backup power circuit. In this scheme, the Bluetooth module 106 assists the control module 102 in data exchange and can undertake transmission tasks, allowing the control module 102 to focus on real-time tasks such as accelerometer data and collision event data measured by the inertial sensor 101. This design optimizes the allocation of computing resources, enhances data reliability, and reduces the selection cost of the control module 102.

[0048] For specific selection, please refer to Figure 5 The Bluetooth module 106 can use the CY15B256Q-SXE Bluetooth chip; see [link / reference]. Figure 11 The interface of the Bluetooth module 106 is specifically connected to the 81 / 80P IN pin of the control module 102, and uses UART communication to connect to Bluetooth for data transmission and reading.

[0049] In one embodiment, the vehicle event data recording system further includes a built-in antenna 108, which is connected to the Bluetooth module 106. Through this solution, the present application achieves wireless export of event data via Bluetooth transmission protocol by embedding the built-in antenna 108 into the Bluetooth module 106, eliminating the need for OBD-II interface connection harnesses and protocol conversion modules, thus reducing hardware costs. Furthermore, the built-in antenna 108 supports concurrent connections from multiple devices, allowing simultaneous connection to mobile terminals and cloud platforms, enabling real-time data distribution and improving response efficiency.

[0050] In specific configuration selections, the Bluetooth module 106 can utilize the NORD IC nRF52833, a multi-protocol SOC with Bluetooth direction-finding radio, operating within an extended temperature range of -40°C to 105°C, featuring ample memory and dynamic multi-protocol support. It includes a range of analog and digital interfaces such as NFC-A, ADC, full-speed 12Mbps USB 2.0, high-speed 32MHz SPI, UART / SPI / TWI, PWM, I2S, and PDM, and has a 1.7V to 5.5V power supply voltage range, allowing for device powering via a rechargeable battery or USB. The built-in antenna 108 can be a surface-mount ceramic type for convenient data viewing and downloading.

[0051] In one embodiment, the memory 103 uses an SPI interface FRAM type temporary storage. This scheme and configuration, using FRAM type temporary storage, offers advantages such as fast write speed, high durability, and non-volatile nature, ensuring real-time system response, continuous recording of vehicle status, continuous data caching, and cyclic recording of driving behavior data, which is beneficial for supporting accident retrospective analysis. Using an SPI interface saves circuit board space, reduces pin occupancy, and allows for rapid data export, shortening troubleshooting time.

[0052] In one embodiment, the power module 105 is configured with two 5F supercapacitor batteries. With this solution, during vehicle operation, the vehicle event data recording system may face frequent starts and stops. The supercapacitor batteries can respond quickly, rapidly providing the necessary power at the moment of system startup, ensuring the system can begin recording data promptly. The supercapacitor batteries can provide high instantaneous power output, meeting the high power demands of the vehicle event data recording system for rapid storage and processing of large amounts of data in emergency situations (such as the moment of a vehicle collision), ensuring the integrity and accuracy of data recording, for example, meeting the requirement of data recording 250ms after the collision zero point. Furthermore, the supercapacitor batteries can serve as an auxiliary power source, providing stable power to the data recording system when the vehicle's power output is unstable, ensuring the system's normal operation.

[0053] The vehicle event data recording system provided in this embodiment can effectively monitor the vehicle's operating data continuously via the CAN bus; when the vehicle's speed changes significantly in a short period of time (i.e., when an accident occurs), the EDR will quickly record key data within a few seconds before and after the collision.

[0054] Secondly, this embodiment also provides a vehicle event data recorder, including the aforementioned vehicle event data recording system.

[0055] In one embodiment, the vehicle event data recorder further includes an upper housing 201, a PCBA board 202, a lower housing 203, and connectors 204. The PCBA board 202 is detachably disposed within the cavity formed by the upper housing 201 and the lower housing 203 via multiple connectors 204. The connectors 204 are used to jointly fix the upper housing 201, the PCBA board 202, and the lower housing 203. This design establishes a detachable connection, facilitating the assembly and disassembly of the vehicle event data recorder. The upper housing 201 and the lower housing 203 form an external protective structure, and the PCBA board 202 provides a connection area for the circuitry and hardware in the vehicle event data recording system.

[0056] The vehicle event data recorder provided in this embodiment is small in size, with the main body dimensions configurable to 80X60X25mm; the EDR does not affect the original vehicle's working status, only performing recording work; data can be viewed and downloaded via Bluetooth, and data can also be viewed and downloaded via CAN channel; the EDR is simple to assemble, the shell is sturdy and not easily deformed, and there are many options for in-vehicle installation.

[0057] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vehicle event data recording system, characterized in that, include: The system includes an inertial sensor (101), a control module (102), a memory (103), a power module (105), and a connector (107). The inertial sensor (101) is used to measure the lateral and longitudinal acceleration of the vehicle. The inertial sensor (101) is bidirectionally connected to the control module (102). The control module (102) is connected to the inertial sensor (101) via an SPI interface. The memory (103) is bidirectionally connected to the control module (102). The connector (107) is connected to the external vehicle control system to obtain vehicle information and event data. The power module (105) includes a power protection circuit and a backup power circuit. The input terminal of the power protection circuit is connected to the connector (107), the output terminal of the power protection circuit is connected to the input terminal of the backup power circuit, and the output terminal of the backup power circuit is connected to the control module (102).

2. The vehicle event data recording system according to claim 1, characterized in that, The vehicle event data recording system also includes a base chip (104), the power input terminal of which is connected to the connector (107), and the power output terminal of which is connected to the input terminal of the power protection circuit; the base chip (104) and the connector (107) are also bidirectionally connected via a CAN line, and the base chip (104) and the control module (102) are bidirectionally connected via at least an SPI interface.

3. The vehicle event data recording system according to claim 2, characterized in that, The connector (107) includes an IO input line, the output of which is connected to the control module (102) and the base chip (104) respectively.

4. The vehicle event data recording system according to claim 1, characterized in that, The vehicle event data recording system also includes a Bluetooth module (106), which is bidirectionally connected to the control module (102), and the power input terminal of the Bluetooth module (106) is connected to the output terminal of the backup power circuit.

5. The vehicle event data recording system according to claim 4, characterized in that, The vehicle event data recording system also includes a built-in antenna (108), which is connected to the Bluetooth module (106).

6. The vehicle event data recording system according to claim 1, characterized in that, The memory (103) is a temporary storage device of type FRAM with an SPI interface.

7. The vehicle event data recording system according to claim 1, characterized in that, The power module (105) is configured with two 5F supercapacitor batteries.

8. A vehicle event data recorder, characterized in that, Includes the vehicle event data recording system as described in any one of claims 1-7.

9. The vehicle event data recorder according to claim 8, characterized in that, It also includes an upper shell (201), a PCBA board (202), a lower shell (203), and connectors (204). The PCBA board (202) is detachably disposed in the cavity formed by the upper shell (201) and the lower shell (203) through a plurality of connectors (204). The connectors (204) are used to fix the upper shell (201), the PCBA board (202), and the lower shell (203) together.

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