Control method and system for intelligent early-warning deceleration strip of automobile

Abstract

The invention discloses a control method and system for an intelligent early-warning deceleration strip of an automobile. The method comprises the steps that whether a deceleration strip early-warning auxiliary function is started or not is judged based on a user instruction; after it is judged that the deceleration strip early warning auxiliary function is started, a vehicle-mounted camera is called to shoot a road image in the vehicle advancing direction; performing deceleration strip identification on the road image; and controlling the vehicle according to the identification result. The method has the advantages that the deceleration strip in front of the driver is recognized and reminded in an image recognition mode, the driver is reminded to decelerate, vehicle accidents and driving risks caused by the fact that the deceleration strip is not found in time are reduced, the driving auxiliary safety function is improved, and the intelligent auxiliary experience of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent auxiliary control of automobiles, and in particular to a control method and system for intelligent warning speed bumps of automobiles. Background Art

[0002] While research on speed bumps has been extensive both domestically and internationally, it hasn't addressed the comfort and safety of drivers and passengers. Drivers often struggle to identify speed bumps ahead, leading to premature braking and resulting in bumpy rides that affect passenger comfort. Excessive speed can also lead to serious accidents such as rollovers.

[0003] Speed ​​bumps are designed to slow down users and improve vehicle and pedestrian safety. Passing over them at high speeds can pose a safety hazard. However, drivers often fail to detect the deceleration time due to distractions or other factors, resulting in excessive speed when passing over the bumps, impacting the user experience. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a control method and system for automobile intelligent warning speed bumps, which is used to identify and remind the driver of the speed bumps in front through image recognition, remind the driver to slow down, and reduce vehicle accidents and driving risks caused by failure to detect speed bumps in time.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a control method for an intelligent warning speed bump of an automobile, comprising:

[0006] Determine whether to activate the speed bump warning auxiliary function based on user instructions;

[0007] After determining to activate the speed bump warning auxiliary function, the vehicle camera is called to capture the road image in the direction of vehicle travel;

[0008] Identify speed bumps on road images;

[0009] The vehicle is controlled based on the recognition results.

[0010] User commands are entered through the vehicle's onboard switches, including commands corresponding to turning on and off the speed bump warning auxiliary function.

[0011] By identifying the road image, it is determined whether there is a speed bump in the direction of the vehicle's travel and the distance between the speed bump and the vehicle.

[0012] Controlling the vehicle based on the recognition result includes displaying a reminder signal of the speed bump ahead through the on-board instrument or on-board large screen and / or driving the instrument alarm to emit a sound alarm message to remind the driver of the speed bump ahead.

[0013] The estimated time it takes for the vehicle to reach the speed bump is calculated based on the current vehicle speed and the distance between the vehicle and the speed bump. The user reaction time is set based on the estimated time. If the time reaches the user reaction time after the alarm signal or reminder signal is issued and no vehicle deceleration operation by the driver is detected, the vehicle enters the self-speed limiting process, and the vehicle is controlled to decelerate when passing the speed bump through the vehicle self-speed limiting process.

[0014] After entering the vehicle self-speed limiting process, the motor torque is controlled to linearly reduce the vehicle speed until the speed drops to the set passing speed or the vehicle passes through the speed bump, and then the self-speed limiting process ends.

[0015] After entering the self-speed limit process, the vehicle radar is used to detect the vehicle information behind the vehicle and the probability of a collision after the current vehicle is decelerated is judged based on the rear vehicle information; based on the probability of a collision after the vehicle is decelerated to the speed limit, it is determined whether to reduce the vehicle speed through the motor.

[0016] When the probability of a collision is determined to be less than a probability threshold, the vehicle speed is linearly reduced by controlling the motor torque until the speed drops to the set passing speed or the vehicle passes through a speed bump; otherwise, the vehicle's self-speed limit process ends and the driver continues to receive reminders of speed bumps ahead.

[0017] Before reaching the speed bump, if the vehicle speed is greater than the set passing speed, the damping of the vehicle's electronically controlled chassis is adjusted according to the predicted speed of passing the speed bump to adjust the vehicle chassis damping parameters to match the state of passing the speed bump, and the original damping parameters are restored after passing the speed bump.

[0018] A control system for an intelligent warning speed bump on a car, comprising an on-board camera, a function switch, a domain controller, and an on-board controller;

[0019] The function switch is used to input the corresponding instructions for turning on and off the speed bump warning auxiliary function, and its output end is connected to the domain controller;

[0020] The domain controller is connected to the vehicle-mounted camera and controls the vehicle-mounted camera to turn on after receiving the function switch on instruction. The vehicle-mounted camera captures the road image in the direction of vehicle travel and sends it to the domain controller; the domain controller identifies the speed bump in the road image through image recognition, and then controls the vehicle according to the recognition result.

[0021] The advantages of this invention include: using image recognition to identify and alert the driver to speed bumps ahead, prompting the driver to slow down, reducing vehicle accidents and driving risks caused by not promptly detecting speed bumps, improving driver assistance safety functions, and enhancing the vehicle's intelligent assistance experience. Using cameras and intelligent warning systems, the driver can determine the distance to the speed bump and prepare for deceleration in advance, reducing bumps and improving the comfort and safety of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a brief description of the contents and symbols in the drawings of the present invention:

[0023] Figure 1 This is a system block diagram of the intelligent early warning speed bump control method of the present invention;

[0024] Figure 2 This is a flow chart of the intelligent warning speed bump control method of the present invention. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[0026] The present invention aims to overcome the drawback of drivers having difficulty seeing speed bumps ahead from a distance, causing vehicles to pass over them at higher speeds, resulting in bumps and vibrations. This embodiment proposes a method for controlling intelligent speed bump warnings in vehicles. This method uses a camera and an intelligent warning system to assist the driver in determining the distance to the speed bump, allowing them to prepare for deceleration in advance, reducing bumps and improving the comfort and safety of the driver and passengers.

[0027] This embodiment provides a method for controlling an intelligent warning speed bump for an automobile, including:

[0028] S1. Determine whether to activate the speed bump warning auxiliary function based on user instructions;

[0029] S2. After determining that the speed bump warning auxiliary function is activated, calling the vehicle-mounted camera to capture an image of the road in the direction of vehicle travel;

[0030] S3, identifying speed bumps on the road image;

[0031] S4. Control the vehicle according to the recognition result.

[0032] In step S1, a driver-controlled function is provided as an auxiliary function, thus satisfying the user's proactive requirements. The driver's control intention is realized through a switch. User commands are entered through the vehicle's onboard switch, including commands corresponding to turning the speed bump warning auxiliary function on and off. The onboard switch is a function switch, implemented as a soft switch integrated into the vehicle's central control screen. The driver enters user commands through the soft switch and turns the system function on and off by manipulating the soft switch on and off.

[0033] In step S2, after the user triggers the soft switch to activate the function, this solution automatically identifies and determines whether there are speed bumps on the road ahead, thereby developing a control strategy corresponding to the presence of speed bumps. If the soft switch is not activated, no further action is required. After the speed bump warning function is activated via the soft switch, the system detects whether there are speed bumps ahead in the vehicle's direction of travel. At this point, the vehicle's onboard camera, typically the front camera or the roof camera, is used to capture images or video of the road ahead. These images or video are then used for subsequent speed bump identification and processing. If video data is being captured, a frame is extracted at fixed intervals or frames for subsequent image recognition.

[0034] In step S3, speed bumps are identified in the road image using an image recognition algorithm. This image recognition algorithm can employ various known algorithms, including but not limited to neural networks. A neural network model is trained using a training set of speed bump images. Based on the trained model, the presence of speed bumps in the image can be automatically identified. Once the speed bump is identified, its location in the image can be determined using various methods, such as reference frame transformation, and the distance from the vehicle to the speed bump can be calculated. By identifying the road image, the presence of a speed bump in the vehicle's direction of travel and the distance between the speed bump and the vehicle can be determined, providing basic parameter data for subsequent vehicle control.

[0035] In step S4, the vehicle is controlled according to the recognition result, including multiple control strategies:

[0036] 1. Remind the driver of speed bumps by reminding them, so that they can pass through the speed bumps by themselves;

[0037] 2. Control the vehicle to automatically slow down and limit the speed to help the driver slow down when passing speed bumps, thus achieving the purpose of assisted driving;

[0038] 3. When assisted automatic deceleration is unavailable, the system will continuously issue an alarm and adjust the vehicle chassis damping reference to minimize damage to the vehicle and the impact on the driving experience caused by passing over speed bumps at high speed.

[0039] The control strategies involved in step S4 will be described in detail one by one below:

[0040] After identifying a speed bump ahead of the vehicle, the driver must first be alerted to avoid the risk of the driver not noticing the speed bump and driving through it at high speed. This alert is then provided to the driver, allowing them to proactively slow down and drive through the speed bump. To achieve this, the solution can display a warning signal of the speed bump ahead on the vehicle's instrument panel or large screen, or drive the instrument panel alarm to sound an alarm to alert the driver. Both the vehicle's instrument panel and the vehicle's display can issue a warning of the speed bump ahead via text, images, or other means. Once the driver receives the reminder, they can proactively slow down and avoid the potential dangers of driving through the speed bump.

[0041] In a preferred embodiment, in order to prevent the driver from ignoring the reminder information and failing to take deceleration control measures, this solution detects the driver's operating status based on the reminder. If the driver does not take any deceleration operation, the vehicle can be automatically decelerated and limited in speed by automatic control, thereby achieving the purpose of automatic deceleration of the vehicle. The solution includes:

[0042] The estimated time it takes for the vehicle to reach the speed bump is calculated based on the current vehicle speed and the distance between the vehicle and the speed bump. A user reaction time is set based on the estimated time. If the user reaction time is reached after the alarm or reminder signal is issued and no driver deceleration is detected, the system enters the vehicle's automatic speed limiting process, which controls the vehicle's deceleration through the speed bump. After the speed bump is detected, an alarm is issued to alert the driver. Under normal circumstances, deceleration and braking are performed to achieve a relatively low speed over the speed bump. If the driver does not take any action, it indicates that the driver ignored or failed to heed the alarm signal. In this case, further speed limiting is required to assist the driver and enable the vehicle to pass the speed bump at a low speed. The estimated time to reach the speed bump is calculated by subtracting one-third of the estimated time, or another appropriate ratio, from the user reaction time. If no brake pedal action is detected from the time the alarm is issued to the end of the reaction time, it indicates that the driver did not take any action. In this case, the system enters the vehicle's automatic speed limiting process, which limits and decelerates the vehicle's speed to help the driver control the speed and achieve the desired speed reduction.

[0043] After entering the self-limiting process, the vehicle performs deceleration control to lower the vehicle speed below a certain threshold, enabling it to pass over a speed bump at a low speed. This deceleration control includes linearly reducing the vehicle speed by controlling the motor torque until the vehicle reaches the set passing speed or passes over the speed bump, at which point the self-limiting process ends. For electric vehicles, speed reduction is achieved by adjusting the motor torque. To avoid driver and safety hazards caused by a sudden speed reduction, this solution uses linear speed reduction control until the vehicle reaches the set speed and then passes over the speed bump at the set speed. Alternatively, if the distance is too short and the vehicle passes over the speed bump before decelerating to the set speed, the deceleration process can be terminated by detecting that the vehicle has passed over the speed bump. After the self-limiting process ends, the vehicle speed is controlled in response to the driver's control. Whether the vehicle has passed over the speed bump can be determined by body motion signals, vibration signals, or speed bump location signals captured by a camera. If the speed bump is not detected in images captured for several consecutive seconds, it can be determined that the speed bump has been passed. If the vehicle exhibits significant up-and-down fluctuations and then stabilizes, it can also be determined that the speed bump has been passed.

[0044] To improve safety and prevent potential safety hazards caused by the self-speed limit process, as well as accidents caused by vehicles behind, the vehicle uses radar to detect vehicles behind the vehicle and, based on this information, determines the probability of a collision after deceleration. This probability determines whether to reduce the vehicle's speed using the electric motor. If the collision probability is less than a threshold, the vehicle's speed is linearly reduced by controlling the motor torque until it reaches the set speed or passes over a speed bump. Otherwise, the self-speed limit process ends and the driver is continuously alerted to the presence of a speed bump. The collision probability is determined based on the distance between the vehicle ahead and behind. If the radar detects that the distance from the vehicle ahead is less than a set threshold, the collision risk is considered high; otherwise, it is considered low. If the risk is high, the self-speed limit process ends immediately, as limiting the speed using the assistance function could result in a collision. If the risk is low, assistance can be used to reduce the vehicle's speed to allow it to pass the speed bump. When the risk is relatively small, the vehicle will be controlled to light up both flashes at the same time to alert the vehicles behind and avoid rear-vehicle collision accidents caused by the deceleration of the vehicle in front. When the risk of collision is relatively small, the vehicle will also use both flashes to alert the vehicles behind, thereby ensuring safety when decelerating through speed bumps.

[0045] In a preferred embodiment, if the collision risk is large, the self-speed limiting process ends. At this time, the vehicle speed is greater than the set speed for passing the speed bump, or the driver actively slows down but the speed after deceleration is still greater than the speed for passing the speed bump. At this time, in order to ensure the vehicle experience, before reaching the speed bump, if the vehicle speed is greater than the set speed for passing the speed bump, the damping of the vehicle's electronically controlled chassis is adjusted according to the predicted speed for passing the speed bump to adjust the vehicle chassis damping parameters to match the state of passing the speed bump, and restore to the original damping parameters after passing the speed bump. By adjusting the vehicle chassis damping to adapt to the purpose of passing the speed bump at high speed, the bumps and vehicle damage caused by passing the speed bump can be reduced as much as possible, thereby improving the vehicle's reliability and speed bump passability.

[0046] In a control method for an intelligent warning speed bump for an automobile in this embodiment, the control system on which its operation depends includes an on-board camera, a function switch, a domain controller, and an on-board controller;

[0047] The function switch is used to input the corresponding instructions for turning on and off the speed bump warning auxiliary function, and its output end is connected to the domain controller;

[0048] The domain controller is connected to the vehicle camera. After receiving the function switch on command, it controls the vehicle camera to turn on. The vehicle camera captures the road image in the direction of the vehicle's travel and sends it to the domain controller. The domain controller uses image recognition to identify speed bumps in the road image, and then controls the vehicle based on the recognition results.

[0049] The domain controller, as the core, implements vehicle control using the control methods described in the above embodiments. The domain controller is connected to the instrument panel, central control screen, and VCU. The VCU can also connect to the BMS and MCU, enabling functions such as driver reminders and auxiliary speed limit control, thereby implementing the control methods described in the above embodiments.

[0050] This embodiment provides a control method for intelligent warning speed bumps in automobiles, which is used to control vehicle speed through a camera and an intelligent warning system. The method includes a large screen, a front camera, an intelligent warning system, a domain controller, a VCU, a BMS, and an MCU.

[0051] The large screen module is used for users to choose to turn on or off the function of the intelligent warning speed bump through the large screen soft switch, and send the function start signal to the domain controller for processing, and its output end is connected to the domain controller.

[0052] The front camera module is used to collect image information of the speed bump in front, and convert the detected image information into an image signal, which is then converted into an electrical signal and sent to the domain controller for processing. Its input and output ends are connected to the domain controller.

[0053] The intelligent early warning system converts the image signal detected by the camera into an electrical signal and sends it to the large screen for processing, and its input and output ends are connected to the large screen.

[0054] The VCU module sends the output vehicle speed information to the domain controller for processing and receives a mode switching signal from the domain controller. The VCU module sends the mode switching signal to the BMS module, and its input and output terminals are connected to the domain controller.

[0055] The domain controller module analyzes and processes the image information and vehicle speed sent by the camera and VCU, and its output end is connected to the VCU module.

[0056] The BMS module outputs the vehicle output power to the VCU, and then sends it to the MCU module via the VCU module.

[0057] The MCU module receives the vehicle's output power and outputs the corresponding engine torque to reduce the vehicle speed and achieve the purpose of intelligent warning of speed bumps.

[0058] like Figure 1 As shown, the system block diagram of the intelligent warning speed bump control method is used for explanation: the IHU sends a function start signal, and after the CEM receives the function start signal, it forwards this signal to the FCM and VCU modules. After the FCM receives the function start signal, it collects image information and sends the image signal to the CEM; after the VCU receives the function start signal, it sends the vehicle speed signal to the CEM; the intelligent warning system module in the CEM collects signals from the FCM and VCU, and analyzes whether there is a speed bump ahead, and then the CEM sends a signal to switch to low-speed mode to the VCU, the VCU receives this signal and forwards it to the BMS, and after receiving this signal, the BMS sends the power in this mode to the VCU, and the VCU forwards this signal to the MCU. The MCU outputs the corresponding torque according to the power, and the vehicle switches to low-speed mode to realize the deceleration function.

[0059] like Figure 2 As shown, the intelligent warning speed bump control method flow chart is used for explanation: the FCM collects image information to determine whether it is a speed bump. If it is a speed bump, the LCD screen displays "There is a speed bump ahead, please slow down" and a beep sounds for 3 seconds, thereby achieving the purpose of issuing a reminder to the user or driver, reminding the driver to slow down and pass.

[0060] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A control method for an intelligent warning speed bump for an automobile, characterized by: include: Determine whether to activate the speed bump warning auxiliary function based on user instructions; After determining to activate the speed bump warning auxiliary function, the vehicle camera is called to capture the road image in the direction of vehicle travel; Identify speed bumps on road images; The vehicle is controlled based on the recognition results.

2. The control method of the intelligent warning speed bump for automobiles according to claim 1, characterized in that: User commands are entered through the vehicle's onboard switches, including commands corresponding to turning on and off the speed bump warning auxiliary function.

3. The control method of the intelligent warning speed bump for automobiles according to claim 1, characterized in that: By identifying the road image, it is determined whether there is a speed bump in the direction of the vehicle's travel and the distance between the speed bump and the vehicle.

4. The control method for an intelligent warning speed bump for an automobile according to claim 1, characterized in that: Controlling the vehicle based on the recognition result includes displaying a reminder signal of the speed bump ahead through the on-board instrument or on-board large screen and / or driving the instrument alarm to emit a sound alarm message to remind the driver of the speed bump ahead.

5. The control method of the intelligent warning speed bump for automobiles according to claim 1 or 4, characterized in that: The estimated time it takes for the vehicle to reach the speed bump is calculated based on the current vehicle speed and the distance between the vehicle and the speed bump. The user reaction time is set based on the estimated time. If the time reaches the user reaction time after the alarm signal or reminder signal is issued and no vehicle deceleration operation by the driver is detected, the vehicle enters the self-speed limiting process, and the vehicle is controlled to decelerate when passing the speed bump through the vehicle self-speed limiting process.

6. The control method of the intelligent warning speed bump for automobiles according to claim 5, characterized in that: After entering the vehicle self-speed limiting process, the motor torque is controlled to linearly reduce the vehicle speed until the speed drops to the set passing speed or the vehicle passes through the speed bump, and then the self-speed limiting process ends.

7. A method for controlling an intelligent warning speed bump for an automobile according to claim 5 or 6, characterized in that: After entering the self-speed limit process, the vehicle radar is used to detect the vehicle information behind the vehicle and the probability of a collision after the current vehicle is decelerated is judged based on the rear vehicle information; based on the probability of a collision after the vehicle is decelerated to the speed limit, it is determined whether to reduce the vehicle speed through the motor.

8. The method for controlling an intelligent warning speed bump for an automobile according to claim 7, characterized in that: When the probability of a collision is determined to be less than a probability threshold, the vehicle speed is linearly reduced by controlling the motor torque until the speed drops to the set passing speed or the vehicle passes through a speed bump; otherwise, the vehicle's self-speed limit process ends and the driver continues to receive reminders of speed bumps ahead.

9. The method for controlling an intelligent warning speed bump for an automobile according to claim 8, characterized in that: Before reaching the speed bump, if the vehicle speed is greater than the set passing speed, the damping of the vehicle's electronically controlled chassis is adjusted according to the predicted speed of passing the speed bump to adjust the vehicle chassis damping parameters to match the state of passing the speed bump, and the original damping parameters are restored after passing the speed bump.

10. A control system for an intelligent warning speed bump on a car, characterized by: Including vehicle-mounted camera, function switch, domain controller, and vehicle-mounted controller; The function switch is used to input the corresponding instructions for turning on and off the speed bump warning auxiliary function, and its output end is connected to the domain controller; The domain controller is connected to the vehicle camera and controls the vehicle camera to turn on after receiving the function switch on instruction. The vehicle camera captures the road image in the direction of vehicle travel and sends it to the domain controller; The domain controller uses image recognition to identify speed bumps in road images and then controls the vehicle based on the recognition results.

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