Collision safety domain control system

Abstract

The invention relates to a collision safety domain control system, and the system comprises a super-capacity module which is used for storing or supplying power; the far-end sensors are distributed on a vehicle body and used for sensing collision signals; the collision safety domain controller is connected with the super-capacity module through a floating independent connector, and is used for acquiring the collision signal and the system electric signal, generating a safety airbag control signal and a door lock driving signal based on the collision signal and the system electric signal, and controlling the super-capacity module to be in a power storage or power supply state at the same time; wherein the super-capacity module is installed on a shell of the collision safety domain controller in an embedded mode. Compared with the prior art, the system has the advantages that the reliability of escape and rescue channels after accidents is guaranteed, the vehicle integration degree is improved, and the collision detection accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of intelligent driving vehicles, and more particularly to a collision safety domain control system. Background Technology

[0002] With the increasing number of cars, vehicle collision safety has attracted widespread public attention, exposing long-standing safety blind spots: a collision may cause a power outage or damage to the vehicle's control system, resulting in locked doors remaining locked and hidden door handles failing to pop out, thus hindering escape and rescue. To address this issue, some manufacturers have designed collision power modules. These independent collision power modules can continue to operate after a vehicle power or control system failure, ensuring the energy required for door locks and handles to unlock. Upon receiving a collision signal from the airbag controller, they unlock the door locks and handles. However, this solution increases the number of controllers and wiring harnesses in the vehicle, hindering the development of vehicle integration.

[0003] Chinese patent application CN113734089A discloses a method for occupant protection control in intelligent driving vehicles. Utilizing the abundant sensors and powerful perception and computing capabilities of intelligent driving technology, it predicts hazard types and decides to execute corresponding avoidance strategies. This includes maneuvering to avoid collisions, or, when a collision is unavoidable, forcibly moving to reduce the relative speed of the two vehicles before the collision, prompting occupants to prepare for the collision, locking doors and windows and pre-tensioning seat belts, and adjusting seats to a pre-collision mode. Upon collision, it triggers airbag deployment. After the collision, it outputs distress signals, unlocks doors and windows, monitors occupant status, and uploads accident data, comprehensively protecting occupant safety. However, its core focus is on proactive intervention "before the collision" and post-collision response measures, without providing an effective solution to the critical issue of "how to unlock the doors when the vehicle's power supply or body control fails after a collision." Furthermore, its ability to protect escape routes remains insufficient when the collision intensity exceeds the expected range and causes the main control system to malfunction.

[0004] Therefore, existing technologies still lack the ability to coordinate and control the deployment of airbags / seatbelts and the unlocking of doors / door handles after a collision, and it is difficult to ensure the execution of critical safety functions simultaneously when the main power fails. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a collision safety domain control system. The system further integrates a supercapacity module and a door lock drive circuit into the airbag controller. This not only deploys the airbags / seat belts to protect the occupants during a collision, but also unlocks the doors / door handles after the collision to ensure unobstructed escape and rescue access for the occupants. Furthermore, because of the integrated supercapacity module, the system can still operate normally by being powered by the supercapacity module in the event of a failure of the vehicle's main power supply.

[0006] The objective of this invention can be achieved through the following technical solutions: A collision safety domain control system, comprising: Supercapacity modules are used for energy storage or power supply; Remote sensors, distributed across the vehicle body, are used to detect collision signals; The collision safety domain controller is connected to the supercapacitor module via a floating independent connector. It is used to acquire the collision signal and the system electrical signal, generate airbag control signal and door lock drive signal based on the collision signal and the system electrical signal, and control the supercapacitor module to be in a power storage or power supply state. The supercapacity module is embedded in the housing of the collision safety domain controller.

[0007] With the above structure, the present invention integrates the supercapacity module and the collision safety domain controller that simultaneously realizes airbag control and door lock actuation into a whole, replacing the separate collision power module and door unlocking module in the prior art.

[0008] Furthermore, the floating independent connector includes a first floating connector located within the supercapacitor module and a second floating connector located within the collision safety domain controller. The supercapacitor module also includes an independent supercapacitor bank and a battery management circuit, and the independent supercapacitor bank, the battery management circuit, the first floating connector, and the second floating connector are connected in sequence.

[0009] Furthermore, the remote sensor includes multiple acceleration sensors and multiple pressure sensors, which are distributed at the front, middle and rear of the vehicle body.

[0010] Furthermore, the collision safety domain controller includes the housing and an airbag system chip, an MCU microcontroller, an IMU sensor, a High-G accelerometer sensor, a door lock drive circuit, and a second floating connector disposed within the housing. The airbag system chip is connected to the remote sensor and the MCU microcontroller, respectively. The MCU microcontroller is connected to the IMU sensor, the High-G accelerometer sensor, the door lock drive circuit, and the second floating connector, respectively. Both the airbag system chip and the second floating connector are connected to the main power supply.

[0011] Furthermore, the airbag system chip is connected to a remote sensor via a PSI5 protocol interface.

[0012] Furthermore, the airbag system chip is connected to the MCU microcontroller for real-time bidirectional communication.

[0013] Furthermore, the door lock drive circuit includes a high-side drive switch and a low-side drive switch for connecting the door / door handle motor.

[0014] Furthermore, the door lock drive signal includes signals that drive the motors of the vehicle door and door handle to unlock sequentially in a time sequence.

[0015] Furthermore, controlling the supercapacitive module to be in energy storage or power supply state specifically involves: When the system electrical signal is powered on, the supercapacitive module is controlled to be in a power storage state; when the collision signal meets the conditions for airbag / seat belt deployment and the system electrical signal is de-powered, the supercapacitive module is controlled to be in a power supply state.

[0016] Furthermore, the supercapacity module is embedded in the side groove of the collision safety domain controller housing via a snap-fit ​​structure, and a sealing ring is provided at the connection between the supercapacity module and the housing.

[0017] Furthermore, when the main power supply is normally connected, the main power supply charges the supercapacitor through the floating connector and the battery management circuit. When a collision causes the vehicle's power supply to be cut off or the vehicle's domain controller to be damaged, once the collision intensity detected by the remote collision sensor and the on-board High-G / IMU sensor reaches the deployment conditions of the airbags / seatbelts, the MCU controls the airbag system chip to deploy the airbags and seatbelts. At the same time, the MCU controls the external supercapacitor module embedded in the collision safety domain controller housing to provide a short-term power supply to the system. The door lock drive circuit uses the energy of the supercapacitor to drive the motors of the doors and door handles to unlock sequentially.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. Ensuring the reliability of escape and rescue routes after an accident. Even if the vehicle's power supply fails or the vehicle's control system is damaged after a collision, the external overcapacity module can provide a brief power supply to the system, ensuring the normal operation of the door lock drive circuit and unlocking the doors and door handle motors sequentially according to a preset time sequence. This design fundamentally eliminates the risk of traditional solutions where power failure prevents electric doors from opening or concealed door handles from popping out, thus affecting the normal use of escape routes and significantly improving the survival probability of occupants after an accident.

[0019] 2. Improved vehicle integration and reduced system complexity. This invention integrates the supercapacity module, door lock drive circuit, and airbag controller into one unit, replacing the separate collision power supply module in existing technologies, thus reducing the complexity of the vehicle's electronic architecture. Simultaneously, the collision unlocking module needs to be located within the vehicle's collision safety zone, requiring minimal damage during a collision. The airbag controller is installed in the central tunnel of the vehicle, which is an excellent collision safety zone. Given increasingly limited space in vehicles, using a separate collision unlocking module would present installation difficulties. This invention effectively avoids this difficulty, saving interior installation space while ensuring high safety.

[0020] 3. Enhance system maintainability and reduce maintenance costs. The external overcapacity module adopts an embedded independent installation design, connecting to the collision safety domain controller motherboard via a floating independent connector, and can be disassembled and replaced individually. When the overcapacity module fails, it is not necessary to replace the entire controller; only the module needs to be repaired or replaced for system maintenance. The floating independent connector connection method can improve the connection reliability between the independent overcapacity module and the collision safety domain controller, specifically: 1) Eliminate assembly misalignment: The floating structure allows connectors to automatically correct positional deviations during assembly, reducing alignment requirements and improving assembly efficiency; 2) Reduced stress: By absorbing errors during the assembly process, floating connectors reduce stress on the PCB and solder joints, lowering the risk of failure and improving product reliability; 3) Increased design flexibility: The use of floating connectors gives designers greater flexibility in layout and tolerances, simplifying the product design process.

[0021] 4. Improve collision detection accuracy. The system uses multiple sensors for simultaneous detection, such as remote sensors, onboard High-G accelerometers, and IMU sensors. Data is transmitted via anti-interference protocols such as PSI5 and SPI. The collision intensity is comprehensively determined by the MCU's collision recognition algorithm, avoiding false triggering of functions due to errors from a single sensor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the collision safety domain control system of the present invention; Figure 2 This is a schematic diagram of a door lock drive circuit according to one embodiment of the present invention. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0024] This embodiment provides a collision safety domain control system, such as Figure 1 As shown, the system includes a supercapacitor module 10, a remote sensor 20, and a collision safety domain controller 30. The supercapacitor module is used for energy storage or power supply. The remote sensor is distributed on the vehicle body to sense collision signals. The collision safety domain controller is connected to the supercapacitor module through a floating independent connector to acquire the collision signal and system electrical signal. Based on the collision signal and system electrical signal, it generates airbag control signal and door lock drive signal, and controls the supercapacitor module to be in a energy storage or power supply state. The supercapacitor module is embedded in the housing of the collision safety domain controller.

[0025] Specifically, the floating independent connectors include a first floating connector 101 located within the supercapacity module 10 and a second floating connector 301 located within the collision safety domain controller 30.

[0026] Furthermore, in one specific embodiment, the supercapacitor module 10 is an independent supercapacitor module, internally integrating a battery management circuit 103 and a supercapacitor 102, and connected to the collision safety domain controller via a first floating connector 101. The supercapacitor module is installed in the controller housing with an embedded structure and is detachable. The number of supercapacitors can be flexibly increased or decreased according to actual needs. If the supercapacitor module is not needed, only the housing of the supercapacitor module needs to be installed. When the power supply is normally connected, the main power supply charges the supercapacitor through the floating connector via the battery management circuit. When a vehicle collision occurs, requiring the airbag / seatbelt to deploy and the door lock actuator to be activated, the supercapacitor supplies power to the system through the battery management circuit via the floating connector, and simultaneously provides energy to the door lock drive circuit to drive the motors of the door and door handle to unlock.

[0027] Furthermore, in one specific embodiment, the remote sensor 20 includes multiple acceleration sensors and pressure sensors distributed at the front, middle, and rear of the vehicle body. When a collision occurs, the remote collision sensor detects the collision intensity and inputs the signal to the collision safety domain controller via the PSI5 protocol. The collision safety domain controller determines, based on the signal intensity, whether the conditions for deploying the airbags / seatbelts and actuating the door lock actuators are met.

[0028] The collision safety domain controller 30, as the core hub of the system, works collaboratively with various functional modules through multiple interface protocols. Further, in one specific embodiment, the collision safety domain controller 30 includes a housing and, within the housing, an airbag system chip 302, an MCU microcontroller 303, an IMU sensor 304, a High-G accelerometer sensor 305, a door lock drive circuit 306, and a second floating connector 301. The airbag system chip 302 is connected to the remote sensor 20 and the MCU microcontroller 303. The MCU microcontroller 303 is connected to the IMU sensor 304, the High-G accelerometer sensor 305, the door lock drive circuit 306, and the second floating connector 301. Both the airbag system chip 302 and the second floating connector 301 are connected to the main power supply. The MCU microcontroller 303 is loaded with a system diagnostic program responsible for real-time monitoring of circuit faults within the overcapacity module, the remote sensor, and the collision safety domain controller, as well as a detonation algorithm for comprehensively analyzing data from the remote collision sensor, the High-G collision sensor, and the IMU sensor to determine whether to trigger the airbag / seatbelt deployment. This embodiment uses existing system diagnostic procedures and detonation function algorithms.

[0029] Specifically, the airbag system chip uses the PSI5 protocol interface to collect acceleration and pressure signals from various parts of the vehicle body in real time. The PSI5 protocol has strong anti-interference capabilities, ensuring high-quality transmission of sensor signals during a collision. The airbag system chip performs preliminary filtering and digitization processing on the received raw PSI5 signals, providing reliable data for subsequent MCU decisions. Simultaneously, it maintains real-time bidirectional communication with the MCU microcontroller via a high-speed SPI bus and I / O ports. On one hand, it transmits pre-processed sensor data to the MCU; on the other hand, it receives control commands from the MCU to execute airbag / seatbelt deployment. The MCU microcontroller undertakes the system's decision-making and management tasks, internally running a vehicle collision recognition algorithm. Its signal input terminals are connected to the IMU sensor and High-G accelerometer sensor via the SPI bus to acquire relevant data. By comprehensively analyzing data from the remote collision sensor, High-G collision sensor, and IMU sensor, it determines whether to trigger airbag / seatbelt deployment and the actuation of the door lock actuators. The IMU sensor, consisting of an accelerometer and a gyroscope, is mounted on the PCB of the collision safety domain controller via SMT surface mount technology (SMT) and communicates with the microcontroller (MCU) via an SPI serial interface. The High-G accelerometer is a dual-channel high-g accelerometer, also mounted on the PCB of the collision safety domain controller via SMT and communicating with the MCU via an SPI serial interface. When the system power switches to the supercapacitor module power, the MCU controls this circuit through the I / O interface, using the supercapacitor's energy to sequentially drive the door and door handle motors to unlock according to a specific timing sequence. Its output is connected to the door lock actuator. The floating connector serves as a bridge for communication between the supercapacitor module and the collision safety domain controller motherboard. It communicates with the battery management circuit via the I2C bus and I / O ports to manage charging and discharging, and simultaneously forms a power supply loop with the supercapacitor and main power supply through power lines.

[0030] Furthermore, in one specific embodiment, the door lock drive circuit is as follows: Figure 2 As shown, it includes a high-side drive switch 361 and a low-side drive switch 362, with the door / door handle motor 363 located between the high-side drive switch and the low-side drive switch.

[0031] Furthermore, in one specific embodiment, the collision safety domain controller (i.e., the airbag controller) is installed in the central tunnel of the vehicle, which is an excellent collision safety zone. It is not easily damaged during a collision and ensures safety without affecting the original vehicle layout.

[0032] When the system is operating, with the controller power supply normally connected, the main power supply charges the supercapacitor via the battery management circuit through the floating connector. When a collision occurs, causing a power outage or damage to the vehicle's domain controller, if the collision intensity detected by the remote collision sensor and the High-G / IMU sensor on the board reaches the deployment conditions for the airbags / seatbelts, the MCU will control the airbag system chip to deploy the airbags and seatbelts. Simultaneously, the MCU controls the external supercapacitor module embedded in the collision safety domain controller housing to provide a brief power supply to the system, while the door lock drive circuit utilizes the energy of the supercapacitor to sequentially drive the motors of the doors and door handles to unlock.

[0033] During system assembly, firstly, the overcapacity module is embedded into the side groove of the controller housing using a snap-fit ​​structure, ensuring precise alignment between the overcapacity module's floating connector and the corresponding interface on the collision safety domain controller's main board. Next, the remote sensors (accelerometer and pressure sensor) are installed at their designed locations at the front, middle, and rear of the vehicle body, and connected to the collision safety domain controller's PSI5 protocol interface via wiring harnesses. Then, on the collision safety domain controller's PCB main board, the airbag system chip, MCU microcontroller, IMU sensor, and High-G accelerometer are sequentially soldered using SMT surface mount technology. Afterward, the PCB main board is installed inside the controller housing, ensuring proper circuit connections between components. Finally, the connections are checked to ensure the system assembly is correct.

[0034] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A collision safety domain control system, characterized in that, include: Supercapacity modules are used for energy storage or power supply; Remote sensors, distributed across the vehicle body, are used to detect collision signals; The collision safety domain controller is connected to the supercapacitor module via a floating independent connector. It is used to acquire the collision signal and the system electrical signal, generate airbag control signal and door lock drive signal based on the collision signal and the system electrical signal, and control the supercapacitor module to be in a power storage or power supply state. The supercapacity module is embedded in the housing of the collision safety domain controller.

2. The collision safety domain control system according to claim 1, characterized in that, The floating independent connector includes a first floating connector located within the supercapacitor module and a second floating connector located within the collision safety domain controller. The supercapacitor module also includes an independent supercapacitor bank and a battery management circuit. The independent supercapacitor bank, the battery management circuit, the first floating connector, and the second floating connector are connected in sequence.

3. The collision safety domain control system according to claim 1, characterized in that, The remote sensors include multiple acceleration sensors and multiple pressure sensors, which are distributed at the front, middle and rear of the vehicle body.

4. The collision safety domain control system according to claim 2, characterized in that, The collision safety domain controller includes the housing and an airbag system chip, an MCU microcontroller, an IMU sensor, a High-G accelerometer sensor, a door lock drive circuit, and a second floating connector disposed within the housing. The airbag system chip is connected to the remote sensor and the MCU microcontroller, respectively. The MCU microcontroller is connected to the IMU sensor, the High-G accelerometer sensor, the door lock drive circuit, and the second floating connector, respectively. Both the airbag system chip and the second floating connector are connected to the main power supply.

5. The collision safety domain control system according to claim 4, characterized in that, The airbag system chip is connected to the remote sensor via the PSI5 protocol interface.

6. The collision safety domain control system according to claim 4, characterized in that, The airbag system chip is connected to the MCU microcontroller for real-time bidirectional communication.

7. The collision safety domain control system according to claim 4, characterized in that, The door lock drive circuit includes a high-side drive switch and a low-side drive switch for connecting the door / door handle motor.

8. The collision safety domain control system according to claim 1, characterized in that, The door lock drive signal includes signals that drive the motors of the car door and door handle to unlock sequentially in a time sequence.

9. The collision safety domain control system according to claim 1, characterized in that, The specific steps of controlling the supercapacitive module to be in energy storage or power supply state are as follows: When the system electrical signal is powered on, the supercapacitive module is controlled to be in a power storage state; when the collision signal meets the conditions for airbag / seat belt deployment and the system electrical signal is de-powered, the supercapacitive module is controlled to be in a power supply state.

10. The collision safety domain control system according to claim 1, characterized in that, The supercapacity module is embedded in the side groove of the collision safety domain controller housing via a snap-fit ​​structure, and a sealing ring is provided at the connection between the supercapacity module and the housing.

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