A vehicle active speed control method and system

Abstract

The application discloses a kind of vehicle active speed control method and system, the method includes: in the process of vehicle driving, obtaining cruise auxiliary request instruction;Collect the speed limit sign image of road two sides, identify the speed limit value in speed limit sign image, and with the speed limit value identified in vehicle map fusion, to judge a road speed limit value;Judge whether the road speed limit value is less than the current cruise speed of vehicle, if less than, then again judge whether the one-key speed limit switch of vehicle is opened, if not opened, then whether the request of current cruise speed is changed is displayed;If not receiving the instruction of confirming change within the set time period, vehicle will maintain current cruise speed unchanged;If receiving the instruction of confirming change within the set time period, vehicle will current cruise speed change as road speed limit value;When newly identified road speed limit value is less than the current cruise speed of vehicle, rejudge whether the one-key speed limit switch of vehicle is opened.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent vehicles, and in particular to a vehicle active speed control method and system. Background Art

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

[0003] With the gradual advancement of intelligent driving technology, various advanced driver assistance features are constantly emerging and being upgraded. Vehicles on the market have gradually implemented functions such as adaptive cruise control (ACC), traffic jam assist (TJA), integrated cruise assist (ICA), and highway assist (HWA).

[0004] The speed control system on current vehicles can be turned on and off as follows: If the ACC / TJA / ICA / HWA (hereinafter referred to as Cruise Assist) and Speed ​​Limit Assist (SLA) systems are functioning properly, pressing the Speed ​​Control System (SCF) switch activates SCF. Pressing the SCF switch again deactivates SCF. The function is turned on or off via the DVD switch setting, and the previous setting is memorized during the next ignition cycle. After SCF is on, if all of the following conditions are met, SCF activates, and Cruise Assist uses the SLA speed limit as the target cruising speed.

[0005] 1) ACC is in active state, including ACTIVE_CONTROL, STAND_ACTIVE, STAND_WAIT, OVERRIDE;

[0006] 2) SLA speed limit ≥ 30km / h;

[0007] 3) The cruise speed setting of the own vehicle is greater than the SLA speed limit or the SLA speed limit - the displayed speed of the own vehicle is greater than or equal to 20 km / h;

[0008] 4) 30km / h ≤ SLA speed limit ≤ 120km / h;

[0009] 5) After confirmation by the driver, the confirmation button is shared with the setting button "SET / -". Pressing "SET / -" during the speed limit prompt pop-up window only means the driver's confirmation and cannot reduce the set speed. The pop-up window prompts for 4-6 seconds. If the driver does not confirm during the pop-up window, the pop-up window will not appear before the new speed limit sign appears. The pop-up window will appear again after the new speed limit sign appears (regardless of whether the speed limit value of this speed limit sign is the same as the previous one).

[0010] In addition, when the longitudinal function of the cruise assist system is in OVERRIDE, the speed limit value sent by SLA is less than the vehicle's set speed (meeting the conditions for SCF activation), and SCF still needs to pop up a window to remind the driver whether to limit the speed to the recognized speed; during the SCF speed limit, if the driver steps on the accelerator OVERRIDE, SCF will not control the vehicle speed. When the driver releases the accelerator pedal and no longer controls the vehicle, the vehicle will perform cruise control according to the confirmed speed limit.

[0011] The above traditional solutions require the driver to repeatedly click to confirm the activation of SCF. In special circumstances, the pop-up window is displayed for a short time and there is no time to confirm, which can easily cause the vehicle speed to exceed the speed limit, resulting in speeding penalties or even more serious consequences. Summary of the Invention

[0012] In order to solve the deficiencies of the prior art, the present invention provides a vehicle active speed control method and system;

[0013] In a first aspect, the present invention provides a vehicle active speed control method;

[0014] A vehicle active speed control method, applied to a vehicle controller, comprising:

[0015] During vehicle driving, obtain cruise assist request instructions;

[0016] Collect images of speed limit signs on both sides of the road, identify the speed limit value in the speed limit sign image, and fuse it with the speed limit value identified in the on-board map to determine a road speed limit value;

[0017] determining whether the road speed limit is less than the current cruising speed of the vehicle; if so, determining whether the vehicle's one-touch speed limit switch is on; and displaying a request for changing the current cruising speed on a display device if the vehicle's one-touch speed limit switch is not on;

[0018] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed.

[0019] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0020] When the newly identified road speed limit value is less than the vehicle's current cruising speed, it is re-determined whether the vehicle's one-button speed limit switch is turned on.

[0021] In a second aspect, the present invention provides a vehicle speed control system;

[0022] A vehicle speed control system includes: a vehicle controller, wherein the vehicle controller is connected to a speed sensor, a camera, a microwave radar sensor, and a display device respectively;

[0023] The vehicle controller is configured to:

[0024] During vehicle driving, obtain cruise assist request instructions;

[0025] Collect images of speed limit signs on both sides of the road and identify the road speed limit values ​​in the speed limit sign images;

[0026] determining whether the road speed limit is less than the current cruising speed of the vehicle; if so, determining whether the vehicle's one-touch speed limit switch is on; and displaying a request for changing the current cruising speed on a display device if the vehicle's one-touch speed limit switch is not on;

[0027] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed.

[0028] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0029] When the road speed limit value is again lower than the vehicle's current cruising speed, it is re-determined whether the vehicle's one-button speed limit switch is turned on.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1) This solution optimizes the traditional SCF system's activation decision with intelligent judgment, enabling one-click speed limit confirmation. This means that when a speed limit pop-up window appears, the driver's backend will automatically confirm the speed limit, presumably by clicking "Confirm." This setting ensures that the cruise assist system's cruising speed is always greater than or equal to the speed limit identified by the SLA.

[0032] 2) When the SLA recognized speed is greater than the cruising speed, even if the speed limit self-confirmation function is enabled in the background, a speed limit window will pop up for the driver to confirm whether to implement the new speed limit. If confirmed, the SLA recognized speed limit will be set to the cruising speed, and the SLA speed limit will be automatically set to the cruising speed in the future. If not confirmed, the vehicle will drive at the cruising speed, regardless of the speed before the speed limit prompt. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] Figure 1Apply the flow chart for the SCF function. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0038] All data in this embodiment is obtained in compliance with laws and regulations and based on the consent of the user, and is used legally.

[0039] Explanation of terms:

[0040] ACC: Adaptive Cruise Control;

[0041] TJA: Traffic Jam Assistant;

[0042] ICA: Integrated Cruise Assist integrated cruise assist system;

[0043] HWA:Highway assistance system

[0044] SLA: Speed ​​Limit Assist speed limit assist system;

[0045] SCF: Speed ​​Control Function speed control system;

[0046] FCM: Front Camera Module multi-function front camera;

[0047] FRM: Front Radar Module front microwave radar;

[0048] HMI: Human Machine Interface.

[0049] Example 1

[0050] This embodiment provides a vehicle active speed control method;

[0051] A vehicle active speed control method, applied to a vehicle controller, comprising:

[0052] S101: Acquiring a cruise assist request instruction during vehicle driving;

[0053] S102: collecting images of speed limit signs on both sides of the road, identifying speed limit values ​​in the speed limit sign images, and fusing them with the speed limit values ​​identified in the onboard map to determine a road speed limit value;

[0054] S103: Determine whether the road speed limit is less than the current cruising speed of the vehicle. If so, determine whether the vehicle's one-touch speed limit switch is on. If the vehicle's one-touch speed limit switch is not on, display a request on the display device asking whether to change the current cruising speed.

[0055] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed.

[0056] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0057] When the newly identified road speed limit value is less than the vehicle's current cruising speed, it is re-determined whether the vehicle's one-button speed limit switch is turned on.

[0058] Furthermore, the S102: collects images of speed limit signs on both sides of the road, identifies the speed limit value in the speed limit sign image, and integrates it with the speed limit value identified in the on-board map, thereby determining a road speed limit value; wherein, if the speed limit value in the speed limit sign image is different from the speed limit value identified in the on-board map, a relatively smaller speed limit value is selected as the road speed limit value.

[0059] It should be understood that a relatively small speed limit value is selected as the road speed limit value for the sake of traffic safety.

[0060] Furthermore, the method further comprises:

[0061] S104: If the vehicle's one-touch speed limit switch is turned on, a request to change the current cruising speed is displayed;

[0062] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed and will not display the speed change request again within the set time period;

[0063] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0064] When the newly identified road speed limit is again lower than the vehicle's current cruising speed, the vehicle automatically changes the current cruising speed to the road speed limit and no longer displays the speed change request repeatedly.

[0065] It should be understood that in theory, one-button speed limit means that every time the road speed limit is lower than the current cruising speed, the current cruising speed will be reduced to the road speed limit. However, for traffic safety reasons, although the one-button speed limit switch has been turned on, this application still displays it through the display, allowing the driver to decide whether to change the current vehicle speed. However, when the one-button speed limit switch is turned on, if the driver has chosen to change the current cruising speed to the road speed limit, then when a speed limit is required in the future, the current cruising speed will be directly changed to the road speed limit without the driver's repeated confirmation.

[0066] Furthermore, the current cruising speed of the vehicle is collected by a speed sensor, and the speed sensor uploads the collected vehicle speed data to the vehicle controller.

[0067] Furthermore, the images of the speed limit signs on both sides of the road are collected by the vehicle's camera and microwave radar sensor.

[0068] Example 2

[0069] This embodiment provides a vehicle speed control system;

[0070] A vehicle speed control system includes: a vehicle controller, wherein the vehicle controller is connected to a speed sensor, a camera, a microwave radar sensor, and a display device respectively;

[0071] The vehicle controller is configured to:

[0072] During vehicle driving, obtain cruise assist request instructions;

[0073] Collect images of speed limit signs on both sides of the road and identify the road speed limit values ​​in the speed limit sign images;

[0074] determining whether the road speed limit is less than the current cruising speed of the vehicle; if so, determining whether the vehicle's one-touch speed limit switch is on; and displaying a request for changing the current cruising speed on a display device if the vehicle's one-touch speed limit switch is not on;

[0075] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed.

[0076] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0077] When the road speed limit value is again lower than the vehicle's current cruising speed, it is re-determined whether the vehicle's one-button speed limit switch is turned on.

[0078] Furthermore, the method collects images of speed limit signs on both sides of the road, identifies the speed limit value in the speed limit sign image, and fuses the speed limit value identified in the on-board map to determine a road speed limit value; wherein, if the speed limit value in the speed limit sign image is different from the speed limit value identified in the on-board map, a relatively smaller speed limit value is selected as the road speed limit value.

[0079] Furthermore, the vehicle controller is further configured to:

[0080] If the vehicle's one-touch speed limit switch is turned on, a request to change the current cruising speed will be displayed;

[0081] If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed and will not display the speed change request again within the set time period;

[0082] If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit;

[0083] When the newly identified road speed limit is again lower than the vehicle's current cruising speed, the vehicle automatically changes the current cruising speed to the road speed limit and no longer displays the speed change request repeatedly.

[0084] Furthermore, the current cruising speed of the vehicle is collected by a speed sensor, and the speed sensor uploads the collected vehicle speed data to the vehicle controller.

[0085] Furthermore, the images of the speed limit signs on both sides of the road are collected by the vehicle's camera and microwave radar sensor.

[0086] An intelligent speed control system optimization solution is based on a multifunctional forward-looking camera (FCM) and a front microwave radar (FRM), integrated with an onboard map. It includes a high-definition camera and a millimeter-wave radar. These sensors detect the vehicle's longitudinal environmental conditions while driving, helping the driver visually and auditorily assess the safety of the driving environment and trajectory. The following briefly describes its performance parameter requirements:

[0087] 1 multi-function front-view camera, with at least 1 million pixels, image transmission frame rate cannot be lower than 30 fps, high dynamic pixel range HDR is not less than 120 dB, field of view FOV range is H: ± 25.1°, V: ± 15.8°, signal-to-noise ratio SNR is higher than 38 dB and other performance requirements; 1 microwave radar, working frequency is 77 GHz, FOV is ± 45°@70m; ± 9°@120m; ± 4°@170m, detection distance is ≥ 150m, system update period is ≤ 50ms.

[0088] The above multi-function front-view camera and front microwave radar sensor accurately and efficiently transmit the signals perceived to the corresponding system controller for data processing. These sensing systems are equivalent to providing a safety guarantee for the driver, who can easily complete the cruise and speed limit operation in the car. The system provides acoustic and visual cues for the speed limit requirements that may occur during driving, and realizes emergency braking through CAN communication and ESP to help the driver reduce the possibility of safety accidents during cruising.

[0089] Speed control system intelligent optimization scheme implementation strategy:

[0090] The multi-function front-view camera identifies the speed limit sign on both sides of the road, compares the speed limit value of the vehicle-mounted map, calculates the speed limit value according to the internal fusion strategy, and sends the speed limit value to the cruise assist system through the message;

[0091] The SCF function switch and the SCF one-key speed limit self-confirmation switch button are set in the human-machine operation interface (hereinafter referred to as HMI). The driver can turn on or off the SCF function through the SCF switch button. When the SCF function switch is turned on, the SCF one-key speed limit self-confirmation switch is in an operable state, and at this time the SCF one-key speed limit self-confirmation function can be turned on or off through the button.

[0092] When the cruise function is in an activated state and the SCF switch is turned on, the SCF function is in a standby state, receives the speed limit value fused by the speed limit assist system (SLA), and compares it with the cruise speed. When the speed limit value is lower than the cruise speed, it is considered as an SCF trigger point, which will remind the driver whether to set the speed limit value as the cruise speed.

[0093] When the SCF one-key speed limit self-confirmation function is not turned on, the SCF trigger point reminds the driver. When the driver does not confirm within the reminding time, the cruise system will maintain the cruise speed unchanged. When the driver confirms within the reminding time, the cruise system will set the speed limit value as the cruise speed. The next time the SCF trigger point comes, the SCF will continue to remind the driver whether to set the speed limit value as the cruise speed.

[0094] When the SCF one-button speed limit self-confirmation function is turned on, the SCF trigger point will remind the driver. If the driver does not confirm within the reminder time, the cruise system will maintain the cruising speed unchanged, and the SCF will be in an inhibition state within 10 minutes and will no longer remind the driver. The inhibition time can be set by the driver on the IHU interface; when the driver confirms within the reminder time, the cruise system will set the speed limit value to the cruising speed, and when the next SCF trigger point arrives, the new speed limit value will be automatically set to the cruising speed without any related reminders.

[0095] The SCF trigger point will vary with the current cruising speed, such as Figure 1 As shown in the figure, when the cruising speed is 80km / h, the fusion speed limit value of 60km / h is the trigger point; when the cruising speed is 60km / h, the fusion speed limit value of 60km / h is not the trigger point;

[0096] The prerequisites for activating the SCF function are that the cruise assist system is activated, the speed limit assist system (SLA) function is activated normally, and the SCF function switch is turned on. When these three conditions are not met, the SCF function is in an inhibited state and cannot work.

[0097] Turning off the SCF function does not affect the normal use of the cruise assist system, and the cruise speed switch will not be prompted at this time.

[0098] The combination of Speed ​​Control System (SCF) and Speed ​​Limit Assist (SLA) can greatly improve safety, reduce the risk of speeding / penalty points and reduce the burden on drivers.

[0099] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A vehicle active speed control method, characterized in that: Applied to vehicle controllers, including: During vehicle driving, obtain cruise assist request instructions; Collect images of speed limit signs on both sides of the road, identify the speed limit value in the speed limit sign image, and fuse it with the speed limit value identified in the on-board map to determine a road speed limit value; determining whether the road speed limit is less than the current cruising speed of the vehicle; if so, determining whether the vehicle's one-touch speed limit switch is on; and displaying a request for changing the current cruising speed on a display device if the vehicle's one-touch speed limit switch is not on; If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed. If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit; When the newly identified road speed limit is lower than the vehicle's current cruising speed, re-determine whether the vehicle's one-button speed limit switch is turned on; If the vehicle's one-touch speed limit switch is turned on, a request to change the current cruising speed will be displayed; If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed and will not display the speed change request again within the set time period; If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit; If the instruction to confirm the change is received within the set time period, when the newly identified road speed limit is again less than the vehicle's current cruising speed, the vehicle automatically changes the current cruising speed to the road speed limit and no longer repeatedly displays the speed change request.

2. A vehicle active speed control method as claimed in claim 1, characterized in that: The system collects images of speed limit signs on both sides of the road, identifies the speed limit value in the speed limit sign image, and fuses it with the speed limit value identified in the on-board map to determine a road speed limit value. Among them, if the speed limit value in the speed limit sign image is different from the speed limit value identified in the on-board map, the relatively smaller speed limit value is selected as the road speed limit value.

3. A vehicle active speed control method according to claim 1, characterized in that: The current cruising speed is collected by a speed sensor, and the speed sensor uploads the collected vehicle speed data to the vehicle controller.

4. A vehicle active speed control method as claimed in claim 1, characterized in that: The images of the speed limit signs on both sides of the road are collected by the vehicle's camera and microwave radar sensor.

5. A vehicle speed control system, characterized in that: include: A vehicle controller, wherein the vehicle controller is connected to the speed sensor, the camera, the microwave radar sensor, and the display device respectively; The vehicle controller is configured to: During vehicle driving, obtain cruise assist request instructions; Collect images of speed limit signs on both sides of the road and identify the road speed limit values ​​in the speed limit sign images; determining whether the road speed limit is less than the current cruising speed of the vehicle; if so, determining whether the vehicle's one-touch speed limit switch is on; and displaying a request for changing the current cruising speed on a display device if the vehicle's one-touch speed limit switch is not on; If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed. If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit; If the vehicle's one-touch speed limit switch is turned on, a request to change the current cruising speed will be displayed; If no confirmation of the change is received within the set time period, the vehicle will maintain its current cruising speed and will not display the speed change request again within the set time period; If a confirmation change is received within the set time period, the vehicle changes the current cruising speed to the road speed limit; If the instruction to confirm the change is received within the set time period, when the newly identified road speed limit is again less than the vehicle's current cruising speed, the vehicle automatically changes the current cruising speed to the road speed limit and no longer repeatedly displays the speed change request; When the road speed limit value is again lower than the vehicle's current cruising speed, it is re-determined whether the vehicle's one-button speed limit switch is turned on.

6. A vehicle speed control system as claimed in claim 5, characterized in that: The method collects images of speed limit signs on both sides of the road, identifies the speed limit value in the speed limit sign image, and fuses the speed limit value identified in the on-board map to determine a road speed limit value; wherein, if the speed limit value in the speed limit sign image is different from the speed limit value identified in the on-board map, a relatively smaller speed limit value is selected as the road speed limit value.

7. A vehicle speed control system as claimed in claim 5, characterized in that: The current cruising speed is collected by a speed sensor, and the speed sensor uploads the collected vehicle speed data to the vehicle controller.

8. A vehicle speed control system as claimed in claim 5, characterized in that: The images of the speed limit signs on both sides of the road are collected by the vehicle's camera and microwave radar sensor.

Images