A door lock control method, system, device and medium based on a collision signal

Abstract

The present disclosure relates to the technical field of automobile control, and particularly relates to a door lock control method and system based on a collision signal, equipment and a medium. A first door lock driving module is added in an airbag controller ACU, and a first driving wire harness is directly connected to a door lock. When a vehicle collision occurs, the ACU triggers airbag point explosion, and directly drives the door lock to be unlocked through the first door lock driving module and the first driving wire harness. Meanwhile, the ACU sends a collision unlocking instruction to a body controller BCM or a regional controller ZCU through a vehicle communication network, and the BCM or the ZCU drives the door lock to be unlocked through a second door lock driving module and a second driving wire harness built in the BCM or the ZCU. The present disclosure uses a priority path of ACU direct driving, saves communication transmission time and controller wake-up time, and uses an ACU independent power supply circuit. In an extreme scenario where a main vehicle storage battery power supply circuit is disconnected, the door lock can still be unlocked in time, and the safety and reliability of collision escape are significantly improved.

Description

Technical Field

[0001] This disclosure relates to the field of automotive control technology, and in particular to a door lock control method, system, device and medium based on collision signals. Background Technology

[0002] With the rapid development of the automotive industry, vehicle passive safety systems are receiving increasing attention. Ensuring that vehicle doors can unlock promptly in the event of a collision is crucial for the rapid escape of occupants.

[0003] In existing technology, the control of automotive door locks is typically handled by the Body Control Module (BCM) or the Zone Control Unit (ZCU). Specifically, when a collision occurs, the Airbag Control Unit (ACU) detects the collision signal and triggers the airbag deployment. It then transmits the collision signal to the BCM or ZCU via the CAN bus or CAN FD bus. Upon receiving the signal, the BCM or ZCU drives the door lock motor to perform the unlocking action.

[0004] However, this process involves communication time, resulting in a delay in unlocking. Furthermore, if a collision causes the power supply circuit from the battery to the BCM / ZCU to be cut off, the door lock will be unable to unlock.

[0005] In conclusion, how to achieve rapid and reliable unlocking of door locks in the event of a collision, especially in extreme cases where the power supply circuit is damaged, is a technical problem that urgently needs to be solved. Summary of the Invention

[0006] To address the aforementioned issues, this disclosure provides a door lock control method, system, device, and medium based on collision signals, which solves the problem of untimely door lock unlocking caused by communication delays and controller sleep during vehicle collisions in the prior art.

[0007] like Figure 1 As shown, a door lock control method based on collision signals includes: When a collision occurs, the airbag controller (ACU) receives signals from the collision sensors and makes a collision determination. When the airbag controller (ACU) triggers the deployment of the airbag, it directly outputs an unlocking drive signal to the door lock through its built-in first door lock drive module and the first drive harness that is directly connected to the door lock. Meanwhile, the airbag controller (ACU) sends a collision unlock command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network; in response to the collision unlock command, the body controller (BCM) or the zone controller (ZCU) outputs an unlock drive signal to the door lock through its built-in second door lock drive module and the second drive harness that is directly connected to the door lock. Among them, the path time based on the direct drive of the airbag controller ACU is shorter than the path time through the vehicle communication network and the body controller BCM or the area controller ZCU. This ensures that the time point when the airbag controller ACU outputs the unlock drive signal is earlier than the time point when the body controller BCM or the area controller ZCU outputs the unlock drive signal, forming a dual unlock drive for the door locks.

[0008] Furthermore, it also includes measures to prevent backflow of current: When the airbag controller (ACU) and either the body control module (BCM) or the zone controller (ZCU) output an unlocking drive signal through their corresponding drive harness, the drive current of the drive signal is prevented from flowing to the door lock drive module of the other controller by an isolation module set in the drive circuit.

[0009] Furthermore, when a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or zone control unit (ZCU) to be disconnected, preventing the BCM or ZCU from outputting an unlocking drive signal, the airbag control unit (ACU) still uses its own independent power supply to drive the door lock through the first drive harness to complete the unlocking process.

[0010] Furthermore, when a collision occurs and the Body Controller (BCM) or Zone Controller (ZCU) is in sleep mode, the BCM or ZCU first performs a wake-up action and then outputs an unlock drive signal; at the same time, the Airbag Controller (ACU) directly outputs an unlock drive signal, eliminating the transmission time of the signal in the vehicle communication network and the wake-up time of the controller.

[0011] Furthermore, under normal conditions where the vehicle is not involved in a collision, the door locks are only engaged and disengaged by the Body Control Module (BCM) or the Zone Control Unit (ZCU). The first door lock drive module of the airbag controller (ACU) only outputs an unlock drive signal when a collision is confirmed.

[0012] Secondly, a door lock control system based on collision signals includes: The car door lock has a power supply end and an unlocking actuator connected to the power supply end; The airbag controller (ACU) has a built-in first door lock drive module. The output of the first door lock drive module is connected to the unlocking execution end of the door lock through the first drive wiring harness. The body control module (BCM) or zone control unit (ZCU) has a built-in second door lock drive module. The output of the second door lock drive module is connected to the unlocking execution end of the door lock through the second drive wiring harness. The airbag controller (ACU) is connected to the body control module (BCM) or zone controller (ZCU) via the vehicle communication network. When a vehicle collision occurs, the airbag controller (ACU) is used to directly output an unlocking drive signal to the unlocking execution end through the first door lock drive module and the first drive harness while triggering the airbag deployment; and sends a collision unlocking command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network, so that the body controller (BCM) or the zone controller (ZCU) outputs an unlocking drive signal to the unlocking execution end through the second door lock drive module and the second drive harness.

[0013] Furthermore, it also includes isolation modules: An isolation module is located at the junction of the first drive harness and the second drive harness, or at the output ends of the first door lock drive module and the second door lock drive module respectively, to prevent current from flowing back to the controller at the other end when drive current is output at either end.

[0014] Furthermore, the airbag controller (ACU) has its own independent power supply. When a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or zone controller (ZCU) to be disconnected, preventing the BCM or ZCU from outputting an unlocking drive signal, the airbag controller (ACU) unlocks the door lock through its independent power supply and the first drive harness.

[0015] Furthermore, the first door lock drive module and the second door lock drive module output DC drive signals or PWM drive signals with controllable duty cycles to drive the motor inside the door lock to perform the unlocking action.

[0016] Furthermore, the first drive harness includes a power drive line or a LIN communication line; The vehicle's communication network is either a CAN bus or a CAN FD bus. The door locks are connected to the body control module (BCM) or zone control unit (ZCU) via a LIN bus.

[0017] Thirdly, an electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, which stores computer programs; When a processor executes a computer program stored in memory, it implements the aforementioned door lock control method based on a collision signal.

[0018] Fourthly, a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned door lock control method based on a collision signal.

[0019] Fifthly, a vehicle includes the aforementioned door lock control system based on a collision signal, or uses the aforementioned door lock control method based on a collision signal to perform door lock control.

[0020] This disclosure has at least the following beneficial effects: This disclosure eliminates communication transmission time and controller wake-up time by using the priority path of ACU direct drive, and utilizes the independent power supply circuit of ACU to ensure timely unlocking of door locks even in extreme scenarios where the vehicle's main battery power supply circuit is disconnected, significantly improving the safety and reliability of collision escape.

[0021] Other features and advantages of this disclosure will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the control method flow according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram illustrating the principle of the control method according to an embodiment of this disclosure; Figure 3 This is a schematic diagram of the control system architecture of an embodiment of the present disclosure. Figure 1 ; Figure 4 This is a schematic diagram of the control system architecture of an embodiment of the present disclosure. Figure 2 ; Figure 5 This is a schematic diagram of the electronic device structure according to an embodiment of the present disclosure. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0025] like Figure 1As shown, a door lock control method based on collision signals includes: When a collision occurs, the airbag controller (ACU) receives signals from the collision sensors and makes a collision determination. When the airbag controller (ACU) triggers the deployment of the airbag, it directly outputs an unlocking drive signal to the door lock through its built-in first door lock drive module and the first drive harness that is directly connected to the door lock. Meanwhile, the airbag controller (ACU) sends a collision unlock command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network; in response to the collision unlock command, the body controller (BCM) or the zone controller (ZCU) outputs an unlock drive signal to the door lock through its built-in second door lock drive module and the second drive harness that is directly connected to the door lock. Among them, the path time based on the direct drive of the airbag controller ACU is shorter than the path time through the vehicle communication network and the body controller BCM or the area controller ZCU. This ensures that the time point when the airbag controller ACU outputs the unlock drive signal is earlier than the time point when the body controller BCM or the area controller ZCU outputs the unlock drive signal, forming a dual unlock drive for the door locks.

[0026] In practical implementation, the normal logic of BCM or ZCU driving the door locks to lock and unlock is maintained during normal vehicle use and in the event of a collision. Furthermore, when a collision occurs, the ACU drives the airbags to deploy, simultaneously unlocking all four door locks via the door lock drive mechanism. Because the unlocking time of the BCM or ZCU-driven door locks is later than the unlocking time of the ACU-driven door locks, this disclosure provides two sequential unlocking drives to the door locks in the event of a collision. Specifically, when the power supply circuit from the battery to the door locks via the BCM or ZCU is cut off, the battery can complete the door lock unlocking action earlier via the power supply circuit from the ACU to the door locks.

[0027] like Figure 2 As shown, by constructing a dual-path control logic that combines ACU direct drive and BCM / ZCU communication drive in parallel, the timing of "ACU priority drive" is established. Utilizing the zero-latency characteristic of physical hard-wired direct connection, the transmission time of signals in the vehicle communication network (such as CAN) and the wake-up time of the controller, which are present in traditional solutions, are directly eliminated. This inevitable sequential drive mechanism based on path time differences fundamentally solves the lag problem of collision unlocking, ensuring that the door lock receives the unlocking command the instant a collision occurs, maximizing the occupant's escape time window.

[0028] This disclosure retains the BCM / ZCU drive door lock logic, forming a dual redundancy mechanism of ACU direct drive priority and BCM / ZCU drive backup. The two drive signals arrive at the door lock sequentially. Even if one of them fails due to controller failure or circuit damage, the other can still guarantee the execution of the unlocking action, significantly improving the robustness and success rate of door lock unlocking in the event of a car collision.

[0029] In one embodiment, a backflow prevention step is also included: When the airbag controller (ACU) and either the body control module (BCM) or the zone controller (ZCU) output an unlocking drive signal through their corresponding drive harness, the drive current of the drive signal is prevented from flowing to the door lock drive module of the other controller by an isolation module set in the drive circuit.

[0030] In practical implementation, by introducing an anti-current backflow step into the control method, the potential circuit conflict problem that may occur when dual controllers (ACU and BCM / ZCU) drive the same load (door lock) simultaneously or sequentially is resolved. This prevents the drive current output from one end from flowing back into the controller port that is in a dormant, power-off, or non-operating state at the other end, avoiding damage to the drive module or logical misjudgment, ensuring the electrical safety and stability of the dual-path drive system, and making the dual-redundancy unlocking mechanism practically feasible in engineering.

[0031] In one embodiment, when a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or the zone control unit (ZCU) to be disconnected, preventing the BCM or ZCU from outputting an unlocking drive signal, the airbag control unit (ACU) still uses its own independent power supply to drive the door lock through the first drive harness to complete the unlocking.

[0032] In practical implementation, for extreme scenarios where the power supply circuit from the vehicle's main battery to the BCM / ZCU is disconnected, the ACU's independent power supply is used for backup control. This disclosure breaks through the traditional reliance on a single power supply circuit for door lock control. When the conventional control path (BCM / ZCU) is paralyzed due to a collision power outage, the ACU, as the core of passive safety, uses its highly reliable independent power supply (usually a capacitor or dedicated battery) to take over the unlocking task, ensuring that the door lock can still be physically opened even in the extreme case of vehicle power failure, greatly improving the survival rate in extreme accidents.

[0033] In one embodiment, when a collision occurs and the body control module (BCM) or the zone control unit (ZCU) is in sleep mode, the BCM or ZCU first performs a wake-up action and then outputs an unlock drive signal; at the same time, the airbag control unit (ACU) directly outputs an unlock drive signal, eliminating the transmission time of the signal in the vehicle communication network and the wake-up time of the controller.

[0034] In practical implementation, for scenarios where the BCM / ZCU is in sleep mode, the wake-up process is bypassed using the ACU direct drive path. This eliminates the wake-up time required for the controller to switch from sleep to working state. In the event of a collision while the vehicle is parked and the engine is off (controller in sleep mode), this disclosure ensures that the door lock unlocking action is not delayed or waited for, solving the unlocking blind spot caused by the sleep mechanism and guaranteeing real-time response capability under all weather and operating conditions.

[0035] In one embodiment, under normal conditions where the vehicle has not been involved in a collision, the door locks are only driven by the Body Controller (BCM) or the Zone Controller (ZCU) to perform the locking and unlocking actions. The first door lock drive module of the airbag controller (ACU) activates its output only when a collision is confirmed.

[0036] In practice, under normal conditions, only the BCM / ZCU controls the doors, while the ACU is activated only in the event of a collision. This decouples normal control from emergency control. It retains the BCM / ZCU's ability to manage door locks in complex driving scenarios (such as automatic locking based on vehicle speed, keyless entry, etc.) while preventing the ACU from being accidentally triggered or over-intervening during daily driving, ensuring clear system logic and stable operation.

[0037] like Figure 3 and Figure 4 A door lock control system based on collision signals, comprising: The car door lock has a power supply end and an unlocking actuator connected to the power supply end; The airbag controller (ACU) has a built-in first door lock drive module. The output of the first door lock drive module is connected to the unlocking execution end of the door lock through the first drive wiring harness. The body control module (BCM) or zone control unit (ZCU) has a built-in second door lock drive module. The output of the second door lock drive module is connected to the unlocking execution end of the door lock through the second drive wiring harness. The airbag controller (ACU) is connected to the body control module (BCM) or zone controller (ZCU) via the vehicle communication network. When a vehicle collision occurs, the airbag controller (ACU) is used to directly output an unlocking drive signal to the unlocking execution end through the first door lock drive module and the first drive harness while triggering the airbag deployment; and sends a collision unlocking command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network, so that the body controller (BCM) or the zone controller (ZCU) outputs an unlocking drive signal to the unlocking execution end through the second door lock drive module and the second drive harness.

[0038] In practice, the implementation process of this system and method corresponds one-to-one.

[0039] A first door lock drive module is added to the airbag controller (ACU) and directly connected to the door lock via a first drive wiring harness. When a collision occurs, the ACU triggers airbag deployment and simultaneously unlocks the door lock via the first door lock drive module and the first drive wiring harness. At the same time, the ACU sends a collision unlock command to the body control module (BCM) or zone controller (ZCU) via the vehicle communication network. The BCM or ZCU then unlocks the door lock via its built-in second door lock drive module and second drive wiring harness. This disclosure eliminates communication transmission time and controller wake-up time through the ACU's direct-drive priority path. Furthermore, by utilizing the ACU's independent power supply circuit, it ensures timely door lock unlocking even in extreme scenarios where the vehicle's main battery power supply circuit is disconnected, significantly improving the safety and reliability of collision escape.

[0040] By adding a first door lock drive module to the ACU and directly connecting it to the door lock, along with a second door lock drive module in the BCM / ZCU, a hardware-level dual-drive architecture is constructed. The physical structure of dual wiring harnesses directly connecting to the same actuator ensures that control signals reach the actuator with the fastest speed and shortest path. This hardware architecture not only supports the implementation of fast unlocking functionality but also enhances the inherent reliability of the entire door lock control system.

[0041] like Figure 3 As shown, the airbag controller (ACU) is connected to the body control module (BCM) via CAN communication. The four door locks are connected to the BCM via LIN communication. The four door locks are also connected to the airbag controller (ACU) via hardwired connection. This hardwired connection between the four door locks and the airbag controller (ACU) can transmit 12V DC drive or PWM drive with controllable duty cycle. The hardwired connection between the four door locks and the airbag controller (ACU) can be expanded to include LIN communication.

[0042] like Figure 4 As shown, the Body Domain Controller (ZCU) includes a left Body Domain Controller (L-ZCU) and a right Body Domain Controller (R-ZCU). The left Body Domain Controller (L-ZCU) controls the left front door lock and the left rear door lock. The right Body Domain Controller (R-ZCU) controls the right front door lock and the right rear door lock. The Airbag Controller (ACU) is connected to the left Body Domain Controller (L-ZCU) and the right Body Domain Controller (R-ZCU) via CAN communication. The four door locks are connected to the Body Domain Controller (ZCU) via LIN communication. The four door locks are also connected to the Airbag Controller (ACU) via hardwired connection. This hardwired connection between the four door locks and the Airbag Controller (ACU) can transmit 12V DC drive or PWM drive with controllable duty cycle. The hardwired connection between the four door locks and the Airbag Controller (ACU) can be expanded to include LIN communication.

[0043] In one embodiment, an isolation module is also included: An isolation module is located at the junction of the first drive harness and the second drive harness, or at the output ends of the first door lock drive module and the second door lock drive module respectively, to prevent current from flowing back to the controller at the other end when drive current is output at either end.

[0044] In one embodiment, the airbag controller ACU has its own independent power supply; when a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or the zone controller (ZCU) to be disconnected, causing the body control module (BCM) or the zone controller (ZCU) to be unable to output an unlocking drive signal, the airbag controller ACU drives the door lock to unlock through the independent power supply and the first drive harness.

[0045] In one embodiment, the first door lock drive module and the second door lock drive module output a DC drive signal or a PWM drive signal with a controllable duty cycle to drive the motor inside the door lock to perform the unlocking action.

[0046] In practice, the drive signal is either 12V DC or a PWM drive with a controllable duty cycle, which is compatible with existing mainstream door lock motor drive technologies, reducing system modification costs and implementation difficulty. At the same time, the PWM drive method can also achieve precise control of the unlocking current, ensuring sufficient unlocking torque while preventing motor overload and overheating, thus balancing system energy efficiency and lifespan while ensuring fast unlocking.

[0047] In one embodiment, the first drive harness includes a power drive line or a LIN communication line; The vehicle's communication network is either a CAN bus or a CAN FD bus. The door locks are connected to the body control module (BCM) or zone control unit (ZCU) via a LIN bus.

[0048] In practice, the low-cost nature of the LIN bus is used to achieve status feedback between the ACU and the door lock, while the high reliability of CAN / CAN FD is used to achieve coordination between controllers. This hybrid network architecture ensures real-time signal transmission while balancing the cost-effectiveness of vehicle wiring and the robustness of communication.

[0049] In one embodiment, the system includes four door locks distributed on the four doors of the vehicle, and the first door lock drive module of the airbag controller ACU simultaneously drives the four door locks to unlock via the first drive harness.

[0050] In practice, the system supports simultaneous unlocking of all four doors via the ACU, enabling the opening of all escape routes after a collision. In the event of a severe collision that renders occupants unconscious or unable to escape from a specific door, simultaneous unlocking of all four doors ensures that rescue personnel or survivors inside the vehicle can evacuate from any door, maximizing the flexibility and success rate of rescue efforts and meeting the highest design principles for passive safety systems.

[0051] like Figure 5 As shown, this disclosure provides an electronic device, including a processor 501, a communication interface 502, a memory 503, and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504. Memory 503 stores computer programs; The processor 501 implements the above method when executing a computer program stored in the memory 503.

[0052] This disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0053] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement the method according to the embodiments of this disclosure.

[0054] According to embodiments of this disclosure, the computer-readable storage medium can be a non-volatile computer-readable storage medium, such as including, but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0055] A vehicle includes the aforementioned door lock control system based on a collision signal, or uses the aforementioned door lock control method based on a collision signal to control the door lock.

[0056] To enable those skilled in the art to better understand this disclosure, the principles of this disclosure are explained as follows: In a car crash unlocking process, the airbag control unit (ACU) typically notifies the body control module (BCM) or zone control unit (ZCU) via the CAN bus, which then activates the door locks. This process involves communication time and controller wake-up time, resulting in unlocking delays. Furthermore, if a collision causes the power supply circuit from the battery to the BCM / ZCU to be cut off, the door locks will not be able to unlock.

[0057] First, the communication process between the ACU sending a collision signal and the door unlocking occurs, involving the ACU and BCM / ZCU, resulting in a significant delay in unlocking. In a race-against-time collision escape scenario, this delay can have serious consequences.

[0058] Secondly, this solution is highly dependent on the power supply circuit of the BCM / ZCU. If a collision causes the power supply circuit from the vehicle's main battery to the BCM / ZCU to be cut off, or if the BCM / ZCU itself is damaged due to the collision, even if the ACU successfully sends a collision signal, the BCM / ZCU will not be able to perform the unlocking action, resulting in the door locks not being able to open and the occupants being trapped inside the vehicle.

[0059] This disclosure aims to reduce the communication time between the ACU and BCM or ZCU via CAN during collision unlocking, thereby improving the timeliness of door lock unlocking in the event of a vehicle collision. This disclosure adds a door lock unlocking driver module directly driven by the ACU, improving the safety redundancy of door lock unlocking during a vehicle collision.

[0060] like Figure 2 As shown, when a collision occurs, the collision sensors arranged around the vehicle body send the raw collision signal to the airbag controller (ACU). After a very short logic check, the ACU sends a collision signal to the CAN network and simultaneously unlocks all four doors via its built-in door lock drive module. Typically, after receiving the collision signal from the ACU on the CAN network, the Body Controller (BCM) or Body Domain Controller (ZCU), if it is in a wake-up state, will also unlock all four doors via its built-in door lock drive module. Furthermore, if the BCM or ZCU is in a sleep state, it will first wake up before unlocking all four doors via its built-in door lock drive module.

[0061] A door lock control system based on collision signals, such as Figure 3 and Figure 4 As shown, the door lock control system includes four door locks, an airbag controller (ACU), and a body control module (BCM) or a body domain controller (ZCU). The body domain controller (ZCU) can be multiple, such as the common left body domain controller (L-ZCU) and right body domain controller (R-ZCU). The body control module (BCM) or body domain controller (ZCU) includes a door lock drive module, capable of outputting 12V DC drive or a controllable duty cycle PWM drive. Additionally, the airbag controller (ACU) also includes a door lock drive module, capable of outputting 12V DC drive or a controllable duty cycle PWM drive.

[0062] like Figure 3 and Figure 4As shown, the airbag controller (ACU) is connected to the body control module (BCM) or body domain controller (ZCU) via CAN communication. The four door locks are connected to the BCM or ZCU via LIN communication. Additionally, the four door locks are hardwired to the airbag controller (ACU). This hardwired connection between the four door locks and the airbag controller (ACU) can transmit 12V DC drive or PWM drive with controllable duty cycle. Furthermore, the hardwired connection between the four door locks and the airbag controller (ACU) can be expanded to include LIN communication.

[0063] This disclosure shortens the time for the door lock to unlock after a collision signal is issued, and improves the success rate of door lock unlocking in scenarios where the power supply circuit between the battery and the door lock is cut off during a collision.

[0064] This disclosure breaks away from the traditional single-line serial architecture where the ACU issues commands and the BCM / ZCU executes them. Instead, it adds a door lock drive module to the ACU and directly connects it to the door lock. Upon impact, the ACU, while deploying the airbags, directly drives the door lock to unlock via a hardwired connection. This approach eliminates the communication time between the ACU and the BCM / ZCU, as well as the wake-up time of the BCM / ZCU, allowing the door lock unlocking action to be executed immediately, buying precious time for occupants to escape.

[0065] This disclosure effectively solves the problem of current backflow that may occur when two controllers drive the same load simultaneously by setting up an isolation module (such as a diode), ensuring that the ACU and BCM / ZCU work together without interfering with each other. This not only guarantees a rapid response in the event of a collision, but also maintains the independent control of the door locks by the BCM / ZCU under normal vehicle use conditions, achieving a perfect balance between safety and functionality.

[0066] This disclosure constructs a dual-drive circuit, particularly utilizing the independent backup power characteristic typically found in the ACU. In extreme scenarios where a severe vehicle collision disrupts the power supply circuit from the main battery to the BCM / ZCU, conventional solutions would fail due to BCM / ZCU power failure. In this situation, this disclosure, utilizing the ACU's independent power supply circuit and direct-drive wiring harness, can still reliably unlock the door locks, effectively avoiding the risk of occupants being trapped due to power failure.

[0067] Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A door lock control method based on collision signals, characterized in that, include: When a collision occurs, the airbag controller (ACU) receives signals from the collision sensors and makes a collision determination. When the airbag controller (ACU) triggers the deployment of the airbag, it directly outputs an unlocking drive signal to the door lock through its built-in first door lock drive module and the first drive harness that is directly connected to the door lock. Meanwhile, the airbag controller (ACU) sends a collision unlock command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network; in response to the collision unlock command, the body controller (BCM) or the zone controller (ZCU) outputs an unlock drive signal to the door lock through its built-in second door lock drive module and the second drive harness that is directly connected to the door lock. Among them, the path time based on the direct drive of the airbag controller ACU is shorter than the path time driven through the vehicle communication network and the body controller BCM or the area controller ZCU.

2. The door lock control method based on collision signals according to claim 1, characterized in that, It also includes measures to prevent backflow of current: When the airbag controller (ACU) and either the body control module (BCM) or the zone controller (ZCU) output an unlocking drive signal through their corresponding drive harness, the drive current of the drive signal is prevented from flowing to the door lock drive module of the other controller by an isolation module set in the drive circuit.

3. The door lock control method based on collision signals according to claim 1, characterized in that: When a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or zone control unit (ZCU) to be disconnected, preventing the BCM or ZCU from outputting an unlocking drive signal, the airbag control unit (ACU) uses its own independent power supply to drive the door lock through the first drive harness to unlock the door.

4. The door lock control method based on collision signals according to claim 1, characterized in that: When a collision occurs and the Body Controller (BCM) or Zone Controller (ZCU) is in sleep mode, the BCM or ZCU first performs a wake-up action and then outputs an unlock drive signal; at the same time, the Airbag Controller (ACU) directly outputs an unlock drive signal, eliminating the transmission time of the signal in the vehicle communication network and the wake-up time of the controller.

5. The door lock control method based on collision signals according to claim 1, characterized in that: Under normal conditions where the vehicle is not involved in a collision, the door locks are only engaged and disengaged by the Body Control Module (BCM) or the Zone Control Unit (ZCU). The first door lock drive module of the airbag controller (ACU) is activated and outputs an unlock drive signal only when a collision is confirmed.

6. A door lock control system based on collision signals, characterized in that, include: The car door lock has a power supply end and an unlocking actuator connected to the power supply end; The airbag controller (ACU) has a built-in first door lock drive module. The output of the first door lock drive module is connected to the unlocking execution end of the door lock through the first drive wiring harness. The body control module (BCM) or zone control unit (ZCU) has a built-in second door lock drive module. The output of the second door lock drive module is connected to the unlocking execution end of the door lock through the second drive wiring harness. The airbag controller (ACU) is connected to the body control module (BCM) or zone controller (ZCU) via the vehicle communication network. When a vehicle collision occurs, the airbag controller (ACU) is used to directly output an unlocking drive signal to the unlocking execution end through the first door lock drive module and the first drive harness while triggering the airbag deployment; and sends a collision unlocking command to the body controller (BCM) or the zone controller (ZCU) through the vehicle communication network, so that the body controller (BCM) or the zone controller (ZCU) outputs an unlocking drive signal to the unlocking execution end through the second door lock drive module and the second drive harness.

7. A door lock control system based on a collision signal according to claim 6, characterized in that, It also includes an isolation module: An isolation module is located at the junction of the first drive harness and the second drive harness, or at the output ends of the first door lock drive module and the second door lock drive module respectively, to prevent current from flowing back to the controller at the other end when drive current is output at either end.

8. A door lock control system based on a collision signal according to claim 6, characterized in that: The airbag controller (ACU) has its own independent power supply. When a collision causes the power supply circuit between the vehicle's main battery and the body control module (BCM) or zone control unit (ZCU) to be disconnected, preventing the BCM or ZCU from outputting an unlocking drive signal, the airbag control unit (ACU) unlocks the door locks via an independent power supply and the first drive harness.

9. A door lock control system based on a collision signal according to claim 6, characterized in that: The first door lock drive module and the second door lock drive module output DC drive signals or controllable duty cycle PWM drive signals to drive the motor inside the door lock to perform the unlocking action.

10. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, which stores computer programs; A processor, when executing a computer program stored in a memory, implements a door lock control method based on a collision signal as described in any one of claims 1-5.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements a door lock control method based on a collision signal as described in any one of claims 1-5.

12. A vehicle, characterized in that, The door lock control includes a door lock control system based on a collision signal as described in any one of claims 6-9, or a door lock control method based on a collision signal as described in any one of claims 1-5.

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