A vehicle post-crash safety signal control system and method

Abstract

The application discloses a kind of vehicle collision post-safety signal control system and method, it is related to vehicle control technical field.Utilize model training module to carry out threshold model training according to road condition information and vehicle state, corresponding threshold is calculated, and threshold is issued to airbag controller module, utilize collision evaluation module to analyze collision situation according to collision energy and vehicle state, and carry out power-on recovery operation;Utilize airbag controller module to receive collision signal and carry out collision energy calculation, and according to the comparison result of collision energy and the threshold issued by central control module, through hard-wire control, CAN signal control and PWM signal control mode, high voltage power-off operation is carried out simultaneously.The application optimizes high voltage power-off circuit, realizes the rapid response to collision signal, and through the way of dynamically adjusting collision threshold and implementing comprehensive power-on detection control, the adaptability and safety of airbag controller in different collision scenarios are improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a vehicle collision safety signal control system and method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of the electric and hybrid vehicle market, the importance of vehicle safety technology is becoming increasingly prominent. As a core component of the vehicle's passive safety system, the airbag controller bears the crucial responsibility of protecting occupants in a collision. As the control unit of the vehicle's passive safety system, upon receiving a collision signal, the airbag controller sends an electric current to disconnect the high-voltage module, thus preventing secondary injuries in a timely manner.

[0004] However, existing high-voltage power-off systems for airbag controllers have some problems that urgently need to be solved, which limit their performance in complex collision scenarios.

[0005] Firstly, with the increasing market for electric vehicles in recent years, the high-voltage system on these vehicles needs to be disconnected promptly in the event of an accident, and the door locks need to be unlocked quickly. However, in the current market, when a high-voltage power-off switch system is used, the signal is transmitted to the vehicle control module during a collision, and then the high-voltage is disconnected according to the strategy, which takes a long time. Furthermore, in the event of a collision, the high-voltage power-off circuit is singular, and if the ignition circuit fails, it may be unable to disconnect the high voltage.

[0006] Secondly, traditional high-voltage power-off systems primarily rely on fixed collision thresholds to determine whether to disconnect the high-voltage circuit. While this fixed threshold method can meet basic safety requirements to some extent, it has significant limitations in practical applications. Firstly, the collision risks and safety requirements faced by a vehicle differ depending on its driving conditions (such as high speed, low speed, and parking). For example, at high speeds, a minor collision may not require immediate power disconnection, as this could cause the vehicle to lose power, increasing the risk of an accident. However, at low speeds or when parked, even a minor collision may necessitate timely power disconnection to prevent secondary injuries such as electric shock and fire.

[0007] Furthermore, existing power-off systems often employ a "one-size-fits-all" approach after a collision, cutting off all high-voltage power at once. While this ensures safety, in minor collisions, it may cause the vehicle to lose essential auxiliary functions such as lighting and communication, hindering emergency response for occupants.

[0008] In summary, how to adjust the collision threshold in real time according to actual road conditions, quickly cut off high voltage after a collision, and determine the collision situation and detect the power-on recovery of some equipment after the power-off process are technical problems that need to be solved by existing technologies. Summary of the Invention

[0009] To address the shortcomings of existing technologies, the present invention aims to provide a vehicle collision safety signal control system and method. It optimizes the high-voltage power-off circuit to achieve rapid response to collision signals, and improves the adaptability and safety of the airbag control unit (ACU) in different collision scenarios by dynamically adjusting the collision threshold and implementing comprehensive power-on detection and control.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solution: The first aspect of the present invention provides a vehicle post-collision safety signal control system, comprising: The data acquisition module is used to collect road condition information, vehicle status, and collision signals; The central control module includes a model training module and a collision assessment module. The model training module is used to train a threshold model based on road conditions and vehicle status, calculate the corresponding threshold using the trained threshold model, and send the threshold to the airbag controller module. The collision assessment module is used to analyze the collision situation based on the collision energy and vehicle status, and perform a power-on recovery operation based on the collision situation. The airbag controller module is used to receive collision signals and calculate collision energy. Based on the comparison between the collision energy and the threshold issued by the central control module, it performs high-voltage power-off operation. The high-voltage power-off operation is performed simultaneously through hard-wired control, CAN signal control, and PWM signal control.

[0011] Furthermore, in the model training module, the specific steps for training the threshold model based on road condition information and vehicle status are as follows: Construct a threshold model using a random forest model; The known road condition information and vehicle status are labeled to form a dataset, which is then divided into a training set and a test set. The threshold model is trained using the training set and tested using the test set to obtain the trained threshold model. The threshold is calculated using a trained threshold model based on real-time traffic information and vehicle status.

[0012] Furthermore, a threshold constancy mechanism is set up, which involves classifying the threshold calculation results into intervals and keeping the threshold constant within each interval.

[0013] Furthermore, in the collision assessment module, the specific steps for analyzing the collision situation based on collision energy and vehicle status are as follows: Obtain the collision energy calculated by the airbag controller module and the vehicle state after the collision; Check if the vehicle status meets the conditions for power-on recovery; The collision level is determined based on the collision energy and vehicle condition inspection results. Perform the corresponding power-on recovery operation according to the collision level.

[0014] Furthermore, the collision levels are divided into minor collisions, moderate collisions, and severe collisions. A minor collision is when the collision energy is below the set value and the vehicle condition check result is good. A moderate collision is when the collision energy is below the set value but the vehicle equipment is partially damaged, but it does not affect the auxiliary equipment. A severe collision is when the collision energy is above the set value or the damage to the vehicle equipment affects the power supply of high-voltage equipment.

[0015] Furthermore, high-voltage power-off operations can be performed simultaneously using hard-wired control, CAN signal control, and PWM signal control methods, including: The current is emitted to ignite the high-voltage power-off switch, thus achieving the requirement to disconnect the high voltage. A collision signal is sent to the BDM via a PWM waveform, which then activates the four doors and hazard lights. The collision signal is sent to the BDM via CAN signal, and all four doors are opened and the hazard lights are activated. A collision signal is sent to the BMS via the PWM waveform to disconnect the high voltage. A collision signal is sent to the BMS via CAN signal and the high voltage is disconnected.

[0016] A second aspect of the present invention provides a control method for a vehicle post-collision safety signal control system as described in the first aspect, comprising the following steps: The central control module selects the appropriate energy threshold based on the current road conditions and sends the energy threshold to the airbag controller module. After a vehicle collision, a collision signal is sent to the airbag controller module. After receiving a collision signal, the airbag controller module calculates the collision energy and compares the calculation result with the energy threshold. If the result is greater than or equal to the energy threshold, it directly performs a high-voltage power cut-off operation. Once the voltage is detected to be stable, a power-on recovery operation is performed based on the collision situation.

[0017] A third aspect of the present invention provides a computer-readable storage medium storing a computer program adapted to be loaded by a processor and to execute steps in the control method as described in the second aspect of the present invention.

[0018] A fourth aspect of the present invention provides a computer device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the control method as described in the second aspect of the invention.

[0019] A fifth aspect of the present invention provides a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the control method as described in the second aspect of the present invention.

[0020] The above one or more technical solutions have the following beneficial effects: This invention provides a vehicle collision safety signal control system and method. By combining dynamic collision threshold adjustment and phased power-on recovery control with rapid high-voltage power-off technology, it achieves a reasonable power-off and power-on process after a vehicle collision, significantly improving the adaptability and safety of the airbag controller in different collision scenarios. Through the division of labor between the central control module and the airbag controller, the high-voltage power-off process can adapt to changes in the scenario while ensuring immediacy. This invention further improves the overall safety performance of vehicles, providing a more reliable guarantee for the safe driving of electric and hybrid vehicles.

[0021] This invention employs hard-wired control, CAN signal control, and PWM signal control simultaneously to perform high-voltage power-off operations, ensuring rapid disconnection of the high-voltage power supply in the event of a collision. This multi-signal control approach not only improves the reliability of power-off but also reduces the safety risks caused by the failure of a single signal, ensuring timely disconnection of the high-voltage power supply under various complex conditions and preventing secondary injuries such as electric shock and fire.

[0022] This invention utilizes a model training module within the central control module to dynamically adjust the collision threshold based on road conditions and vehicle status using a random forest model. This allows for real-time optimization of collision judgment criteria based on the vehicle's actual driving conditions (such as speed and road conditions), improving the system's flexibility and adaptability, enhancing collision detection accuracy, and ensuring the stability of the threshold within a certain range through a dynamic threshold adjustment mechanism. This prevents signal delays caused by rapid threshold changes, which could affect the high-voltage power outage response.

[0023] This invention analyzes collision situations through a collision assessment module, quantifies the severity of the collision using collision energy, and combines this with vehicle status to prevent misjudgments caused by collision energy quantification. This enables a more accurate power-on recovery process and prevents secondary accidents.

[0024] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a high-voltage power-off schematic diagram of the airbag controller module in Embodiment 1 of the present invention. Detailed Implementation

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] Example 1: Embodiment 1 of the present invention provides a vehicle collision safety signal control system, including a data acquisition module, a central control module and an airbag controller module.

[0030] The data acquisition module is used to collect road condition information, vehicle status, and collision signals.

[0031] In one specific implementation, the data acquisition module includes several sensors installed on the vehicle, capable of acquiring vehicle status data such as lateral acceleration, longitudinal acceleration, and speed, as well as collision direction and pressure values ​​during a collision. It also monitors the operational status of vehicle equipment using onboard detection devices. Road condition information, such as information on urban roads or highways, is obtained through cameras and a GPS positioning system.

[0032] The central control module includes a model training module and a collision assessment module. The model training module trains a threshold model based on road conditions and vehicle status, calculates the corresponding threshold using the trained model, and then sends the threshold to the airbag controller module. The collision assessment module analyzes the collision situation based on collision energy and vehicle status, and performs a power-on recovery operation accordingly.

[0033] In the model training module, the specific steps for training the threshold model based on road condition information and vehicle status are as follows: Step 1: Construct a threshold model using a random forest model.

[0034] This embodiment uses a random forest model, which has good generalization ability and the ability to handle multiple features, to construct a threshold model. The random forest model can better handle the relationship between multimodal features, such as the impact of vehicle brand on the resistance to bumps on different roads, or the impact of differences in the impact resistance of vehicle materials.

[0035] A random forest model consists of multiple decision trees, each of which is a weak learner. The number of decision trees determines the model's complexity and computational cost. Randomly selecting a subset of features for splitting at each node of a decision tree, instead of using all features, increases the model's diversity. This involves setting hyperparameters such as the number of decision trees, the number of features selected, the maximum depth, the minimum number of samples required for each node split, and the minimum number of samples required for each leaf node.

[0036] Step 2: After labeling the known road condition information and vehicle status, a dataset is formed, and the dataset is divided into a training set and a test set.

[0037] In this embodiment, the known road condition information and vehicle status can be historical vehicle data, existing publicly available datasets, or a combination of both. The dataset is cleaned to remove noise and outliers. Then, the dataset is normalized to transform all features to the same scale. Finally, the dataset is divided into training and testing sets in a 7:3 ratio.

[0038] Step 3: Train the threshold model using the training set and test it using the test set to obtain the trained threshold model.

[0039] In this embodiment, a self-attention module is introduced into the random forest model. Specifically, a learnable weight matrix is ​​used to calculate the weights between features. The features are then weighted and summed based on the calculated weights to generate new feature representations. These weighted summed features are used as input to the random forest model. The weight matrix of the self-attention module is trained using the backpropagation algorithm, enabling the model to automatically learn the weights between features. During training, the output features of the self-attention module are used as input to the random forest model for joint training.

[0040] More specifically, this embodiment uses collision energy as the primary input feature and other influencing factors, such as road condition information, as auxiliary input features, which are then input into the attention module. The query, key, and value matrices of the primary and auxiliary input features are calculated. Based on these matrices, the attention scores and weights of the primary and auxiliary input features are calculated. Furthermore, the weighted features of the primary and auxiliary input features are calculated. The weighted features of the main input and auxiliary input are fused to obtain the final feature representation.

[0041] The self-attention module automatically learns the weights between features, enhancing the model's focus on important features and improving its generalization ability. The thresholding model, based on collision energy calculation, further considers other influencing factors to design a more reasonable threshold result, achieving adaptive dynamic changes in the threshold. Then, methods such as cross-validation are used to optimize the model's hyperparameters. The trained model is evaluated using a test set, with performance measured by metrics such as accuracy, recall, and F1 score. Based on the evaluation results, the model's structure and parameters are adjusted to further optimize its performance.

[0042] Collision energy is one of the key indicators for assessing the severity of a collision. Collision energy E can be calculated using the following formula: .

[0043] Where: m is the vehicle mass; v is the velocity at the time of collision; a is the collision acceleration, calculated from the lateral and longitudinal accelerations; and g is the acceleration due to gravity.

[0044] Step 4: Calculate the threshold using the trained threshold model based on real-time traffic information and vehicle status.

[0045] In this embodiment, to prevent continuous threshold fluctuations caused by constantly changing road conditions and vehicle status information from affecting the vehicle's power-off response and increasing computational burden, the traditional approach extends the threshold change time by setting a data acquisition interval. However, setting the interval too long affects the immediacy of the threshold, making it unsuitable for the current real-time environment. To overcome this difficulty, this embodiment sets a constant threshold mechanism, which classifies the threshold calculation results into intervals and keeps the threshold constant within each interval. Specifically, a threshold interval is set, and the threshold that first reaches the interval is used as the threshold sent to the airbag controller module. That is, as long as the threshold fluctuation does not exceed the current threshold interval, the threshold that first reaches the current threshold interval is used as the threshold sent to the airbag controller module until the threshold fluctuation exceeds the current threshold interval, at which point the threshold sent to the airbag controller module is updated with the first threshold that reaches the new threshold interval. This ensures the real-time dynamics of the threshold and reduces the frequency of threshold updates sent to the airbag controller module to a certain extent, further preparing for faster collision signal response. In addition, since drivers are likely to perform rapid operations before a collision, such as sudden braking, in order to prevent the impact of emergency operations on threshold fluctuations, a rapid fluctuation data cleaning mechanism can be set up within a very short time to remove data fluctuations under emergency operations and exclude them from the input data of the threshold model, thereby avoiding this phenomenon.

[0046] The collision assessment module analyzes the collision situation based on the collision energy and vehicle status.

[0047] First, obtain the collision energy calculated by the airbag controller module and the vehicle state after the collision.

[0048] In this embodiment, the post-collision vehicle status check includes the damage status of various vehicle components. Collision energy can quantify the real-time situation of a collision, but it is prone to being out of touch with reality. Furthermore, vehicle status sometimes does not directly reflect the collision situation. Therefore, this embodiment uses a combination of collision energy and vehicle status for collision level assessment, which is more reasonable and accurate. Additionally, this embodiment directly uses the calculated collision energy instead of recalculating it through machine learning by inputting vehicle status and collision energy, in order to save time. Real-time response after a collision is crucial; therefore, this embodiment implements a power-off followed by assessment operation. Power recovery after a power outage also needs to be real-time. Therefore, to save power-on time, the method of learning and fusing status and energy, as used in some other methods, is not employed for judgment, ensuring rapid power-on even in minor collisions.

[0049] It should be noted that the power-on recovery process in this embodiment is only for quickly restoring power when the collision energy meets the threshold but no substantial damage has occurred. In cases where the hardware and software are unable to detect damage due to a severe collision, no power-on attempt will be made; simply wait for rescue or quickly leave the vehicle.

[0050] Next, check if the vehicle's status meets the conditions for power-on recovery.

[0051] The collision level is determined again based on the collision energy and vehicle condition inspection results.

[0052] In this embodiment, the collision level is divided into minor collision, moderate collision and severe collision. A minor collision is when the collision energy is lower than the set value and the vehicle condition check result is good. A moderate collision is when the collision energy is lower than the set value but the vehicle equipment is partially damaged, but it does not affect the auxiliary equipment. A severe collision is when the collision energy is higher than the set value or the damage to the vehicle equipment affects the power supply of the high-voltage equipment.

[0053] A "good vehicle condition inspection result" means all vehicle equipment is normal, excluding dents or other damage. "Partial damage to vehicle equipment but not affecting auxiliary equipment" means the wiring is normal, there are no oil leaks or controller malfunctions, and low-voltage auxiliary equipment such as communication and lighting (or partial lighting) can function, while some non-critical high-voltage equipment such as entertainment and air conditioning systems may be damaged. "Damage to vehicle equipment affecting high-voltage equipment power supply" refers to situations such as controller malfunction, vehicle oil leaks, or damage to high-voltage equipment power supplies such as electric power steering and electric braking systems, preventing normal starting. In this case, you should move away from the vehicle as much as possible and seek assistance through other means. This embodiment uses a value of 50,000 J, which can be adjusted based on actual test results and safety standards.

[0054] Finally, perform the corresponding power-on recovery operation based on the collision level.

[0055] Specifically, in the event of a minor collision, all devices will automatically recover. In the event of a moderate collision, only low-voltage auxiliary equipment such as communication and lighting devices that can be recovered will be recovered. In the event of a severe collision, power-on recovery is prohibited.

[0056] The airbag controller module is used to receive collision signals and calculate collision energy, and to perform high-voltage power cut-off operation based on the comparison result between the collision energy and the threshold issued by the central control module.

[0057] The airbag controller module includes a high-voltage power-off switch. This switch is configured by writing configuration words; a configuration word of 0 indicates that high-voltage power-off is not supported, while a configuration word of 1 indicates that high-voltage power-off is supported. For example... Figure 1As shown, when a collision occurs, the collision signal is directly transmitted to the airbag controller module via hardwired transmission. It bypasses the main controller's comprehensive collision strategy assessment and is directly compared with the current thresholds pre-issued by the central control module. For example, within a 150ms time interval, 8km / h ≤ longitudinal speed, or within a 150ms time interval, 8km / h ≤ lateral speed. If the thresholds are met, a detonation current of 1.75A is output. This significantly reduces signal processing time. This embodiment simultaneously performs high-voltage power-off operations through hardwired control, CAN signal control, and PWM signal control.

[0058] like Figure 1 As shown, specifically: The current is emitted to detonate the high-voltage power-off switch, thus disconnecting the high voltage. Using a hard-wired method, the high-voltage power-off switch can be detonated within 2ms, achieving a rapid response to high-voltage power failure. When the ACU triggers the detonation of the high-voltage power-off switch, it simultaneously sends a CAN signal to the ICM to illuminate the fault indicator.

[0059] At the same time, the ACU sends a collision signal to the BDM via PWM waveform and opens all four doors and activates the hazard lights. It also sends a collision signal to the BDM via CAN signal and opens all four doors and activates the hazard lights.

[0060] The ACU sends a collision signal to the BMS via PWM waveform and disconnects the high voltage, and also sends a collision signal to the BMS via CAN signal and disconnects the high voltage.

[0061] This embodiment directly disconnects the pyrotechnic control switch via hard-wired transmission of current. Upon collision, the current ignites the propellant, breaking the circuit. Its advantages are speed and immunity to signal interference. Alternatively, a collision signal can be emitted via PWM waveform. After transmission, the BMS needs to identify the waveform. Upon collision, the BMS sends a PWM waveform to the BMS, identifies the waveform, and uses logic to determine that a collision has occurred. The BMS then issues another command to disconnect the relay. However, because the PWM waveform can be affected by external signals and the link is relatively long, the implementation time is longer. This embodiment also emits a collision signal via CAN communication. After transmission, the BMS needs to identify the signal type. Upon collision, the BMS sends a CAN signal to the BMS, identifies the signal, and uses logic to determine that a collision has occurred. The BMS then issues another command to disconnect the relay. By using both CAN signals and PWM waveforms simultaneously, the feasibility of high-voltage power disconnection is further ensured, preventing delays and malfunctions caused by a single affected signal, thus improving vehicle safety.

[0062] Example 2: Embodiment 2 of the present invention provides a control method for a vehicle post-collision safety signal control system as described in Embodiment 1, comprising the following steps: The central control module selects the appropriate energy threshold based on the current road conditions and sends the energy threshold to the airbag controller module. After a vehicle collision, a collision signal is sent to the airbag controller module; After receiving a collision signal, the airbag controller module calculates the collision energy and compares the calculation result with the energy threshold. If the result is greater than or equal to the energy threshold, it directly performs a high-voltage power cut-off operation. Once the voltage is detected to be stable, a power-on recovery operation is performed based on the collision situation.

[0063] Example 3: Embodiment 3 of the present invention provides a computer-readable storage medium storing a computer program adapted to be loaded by a processor and executed as steps in the control method described in Embodiment 2 of the present invention.

[0064] Example 4: Embodiment 4 of the present invention provides a computer device, the device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the steps of the control method as described in Embodiment 2 of the present invention.

[0065] Example 5: Embodiment 5 of the present invention provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the control method as described in Embodiment 2 of the present invention.

[0066] The steps and methods involved in Examples 2, 3, 4 and 5 above correspond to those in Example 1. For specific implementation methods, please refer to the relevant description section of Example 1.

[0067] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data processing device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)). The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle collision safety signal control system, characterized in that, include: The data acquisition module is used to collect road condition information, vehicle status, and collision signals; The central control module includes a model training module and a collision assessment module. The model training module is used to train a threshold model based on road conditions and vehicle status, calculate the corresponding threshold using the trained threshold model, and send the threshold to the airbag controller module. The collision assessment module is used to analyze the collision situation based on the collision energy and vehicle status, and perform a power-on recovery operation based on the collision situation. In the model training module, the specific steps for training the threshold model based on road condition information and vehicle status are as follows: Construct a threshold model using a random forest model; The known road condition information and vehicle status are labeled to form a dataset, which is then divided into a training set and a test set. The threshold model is trained using the training set and tested using the test set to obtain the trained threshold model. The threshold is calculated based on real-time traffic information and vehicle status using a trained threshold model. A threshold constant mechanism is set up, which means classifying the threshold calculation results into intervals and keeping the threshold constant within the interval; The airbag controller module is used to receive collision signals and calculate collision energy. Based on the comparison between the collision energy and the threshold issued by the central control module, it performs high-voltage power-off operation. The high-voltage power-off operation is performed simultaneously through hard-wired control, CAN signal control, and PWM signal control.

2. The vehicle collision safety signal control system as described in claim 1, characterized in that, In the collision assessment module, the specific steps for analyzing the collision situation based on collision energy and vehicle condition are as follows: Obtain the collision energy calculated by the airbag controller module and the vehicle state after the collision; Check if the vehicle status meets the conditions for power-on recovery; The collision level is determined based on the collision energy and vehicle condition inspection results. Perform the corresponding power-on recovery operation according to the collision level.

3. The vehicle collision safety signal control system as described in claim 2, characterized in that, Collision levels are divided into minor collisions, moderate collisions, and severe collisions. A minor collision is when the collision energy is below the set value and the vehicle condition check result is good. A moderate collision is when the collision energy is below the set value but the vehicle equipment is partially damaged, but it does not affect the auxiliary equipment. A severe collision is when the collision energy is above the set value or the damage to the vehicle equipment affects the power supply of high-voltage equipment.

4. The vehicle collision safety signal control system as described in claim 1, characterized in that, Simultaneous high-voltage power-off operations using hard-wired control, CAN signal control, and PWM signal control include: The current is emitted to ignite the high-voltage power-off switch, thus achieving the requirement to disconnect the high voltage. A collision signal is sent to the BDM via a PWM waveform, which then activates the four doors and hazard lights. The collision signal is sent to the BDM via CAN signal, and all four doors are opened and the hazard lights are activated. A collision signal is sent to the BMS via the PWM waveform to disconnect the high voltage. A collision signal is sent to the BMS via CAN signal and the high voltage is disconnected.

5. The control method of the vehicle post-collision safety signal control system as described in any one of claims 1-4, characterized in that, Includes the following steps: The central control module selects the appropriate energy threshold based on the current road conditions and sends the energy threshold to the airbag controller module. After a vehicle collision, a collision signal is sent to the airbag controller module; After receiving a collision signal, the airbag controller module calculates the collision energy and compares the calculation result with the energy threshold. If the result is greater than or equal to the energy threshold, it directly performs a high-voltage power cut-off operation. Once the voltage is detected to be stable, a power-on recovery operation is performed based on the collision situation.

6. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the control method as described in claim 5.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program adapted to be loaded by a processor and executed as described in claim 5.

8. A computer device, characterized in that, A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program that, when executed by the processor, implements the control method as described in claim 5.

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