Vehicle navigation speed limiting method, system and equipment

Abstract

The invention discloses a vehicle navigation speed limiting method, system and equipment, and the method comprises the steps: obtaining the current driving information of a vehicle when the vehicle is in a navigation driving state; wherein the current driving information comprises a current driving scene of the vehicle, a current piloting route of the vehicle and current weather state information; determining a first target vehicle speed value corresponding to the vehicle according to the driving scene and the current piloting route; adjusting the first target vehicle speed value according to the current weather state information to obtain a second target vehicle speed value; and limiting the speed of the vehicle according to the second target vehicle speed value so as to improve the safety of the vehicle in the pilot driving process.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle navigation speed limit method, system and device. Background Art

[0002] With the development of science and technology, in order to reduce the traffic risks caused by long-term driving, the pilot driving system, as an auxiliary driving system that can control the vehicle to perform automatic driving on a memory route, has gradually been applied to a wide range of vehicles. During the driving process, when the vehicle is driving on a memory route, that is, a route memorized after the vehicle has driven on this road section before, the pilot driving system will retrieve the memory route of the road section to form the vehicle's pilot route, and then control the vehicle to perform automatic driving according to the pilot route.

[0003] However, when the existing pilot driving system takes over the control of the vehicle from the driver, it directly controls the driving speed of the previous vehicle as the static driving speed of the subsequent route. It does not take into account the speed limit requirements of different road sections, which puts the vehicle at risk of speeding during driving. It is also unable to adjust the speed according to the specific driving scenario, which puts the vehicle at safety risk during driving. Summary of the invention

[0004] In order to solve the above technical problems, the present invention discloses a vehicle navigation speed limit method, system and device to improve driving safety during navigation driving.

[0005] In order to achieve the above-mentioned object, in a first aspect, the present invention discloses a vehicle navigation speed limit method, comprising:

[0006] When the vehicle is in the pilot driving state, obtaining the current driving information of the vehicle; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and the current weather condition information;

[0007] Determining a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route;

[0008] Adjust the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value;

[0009] The vehicle is speed-limited according to the second target vehicle speed value.

[0010] The present invention discloses a vehicle pilot speed limit method, which first determines a first target speed value of the vehicle based on the driving scene and the current pilot route in the current driving information of the vehicle, so that the first target speed value can meet the speed limit requirements in different scenes and the actual road conditions in different road sections, thereby improving the driving safety of the vehicle. Furthermore, the first target speed is further adjusted using the current weather status information of the vehicle during the pilot driving process, so that the vehicle can travel at a safer speed in potentially bad weather, further improving the driving safety of the vehicle during pilot driving.

[0011] As a preferred example, the obtaining of the current driving information of the vehicle includes:

[0012] Acquire the current position information of the vehicle to determine the first current driving scene of the vehicle according to the position information; wherein the first current driving scene includes an urban driving scene and a high-speed driving scene;

[0013] When the vehicle is in an urban driving scenario, road information of the road section where the vehicle is located is obtained according to the current navigation route of the vehicle to determine the second current driving scenario of the vehicle; wherein the second current driving scenario includes an intersection section driving scenario, a multi-lane section driving scenario and a speed limit section driving scenario.

[0014] When limiting the speed of a vehicle, the present invention takes into account that the speed limit requirements corresponding to different scenarios are also different. Therefore, in order to more accurately execute different speed limit processes, the high-speed scenarios and urban scenarios are first classified, and then the scenes corresponding to different road sections in the urban area are classified, so that the target vehicle speed determined according to the classification is more in line with the actual driving conditions, thereby improving the safety of pilot driving.

[0015] As a preferred example, the determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes:

[0016] When it is determined that the vehicle is in a high-speed driving scene, identifying the high-speed driving lane where the vehicle is located according to the road information;

[0017] A first speed limit value corresponding to the high-speed driving lane is acquired, and the first speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

[0018] The present invention takes into account that there are only high-speed vehicles in the high-speed scene, and therefore performs speed limit protection on the vehicle's driving through the speed limit value corresponding to the lane to adapt to the speed limit requirements of high-speed driving on the high-speed route, thereby improving the safety of pilot driving in the high-speed scene.

[0019] As a preferred example, the determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes:

[0020] When it is determined that the vehicle is in a driving scene at an intersection, the distance from the vehicle to the intersection of the road section where the vehicle is located is obtained according to the road information and the current position information;

[0021] When the distance is less than a preset distance threshold, the distance and the current driving speed of the vehicle are input into a pre-constructed vehicle speed limit adjustment model to obtain a first target vehicle speed value corresponding to the vehicle.

[0022] When the present invention identifies that the current intersection section is in the urban area, considering that the intersection section requires the vehicle to slow down, and the deceleration of the vehicle requires a certain amount of time, the target speed value is calculated according to the distance between the vehicle and the intersection, which can effectively ensure that the vehicle safely passes through the intersection of the section, thereby improving driving safety.

[0023] As a preferred example, the determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes:

[0024] When it is determined that the vehicle is in a driving scene of a multi-lane road section, obtaining the number of lanes corresponding to the road section where the vehicle is located according to the road information;

[0025] A second speed limit value matching the number of lanes is acquired from pre-constructed lane speed limit information, and the second speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

[0026] The present invention utilizes the number of lanes to execute a target vehicle speed value, thereby limiting the speed of a vehicle when it is traveling on a road section with multiple lanes, so as to reduce the safety risk caused by lane changes during vehicle driving, thereby improving the safety of vehicle driving.

[0027] As a preferred example, the determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes:

[0028] When it is determined that the vehicle is in a speed-limited section driving scenario, obtaining a third speed limit value corresponding to the section where the vehicle is currently located from the road information;

[0029] The third speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

[0030] The present invention takes into account that high-speed driving sections in urban scenarios only allow high-speed vehicles to pass. Therefore, speed limit protection is provided for vehicle driving through the speed limit value corresponding to the section to adapt to the speed limit requirements for high-speed driving on the high-speed section, thereby improving the safety of pilot driving in the high-speed driving section.

[0031] As a preferred example, adjusting the first target vehicle speed value according to the current weather status information includes:

[0032] Determine the severity of the current weather according to the current weather status information;

[0033] The first target vehicle speed value is adjusted downward according to the severity to obtain a second target vehicle speed value of the vehicle.

[0034] The present invention limits the driving speed of the vehicle itself according to the severity of the weather, and tries to avoid the potential safety hazards caused by the severe weather, thereby better improving the safety of the vehicle during driving.

[0035] As a preferred example, limiting the speed of the vehicle according to the second target vehicle speed value includes:

[0036] Acquiring a current driving speed of the vehicle, and comparing the current driving speed with the second target speed;

[0037] When the current driving speed is greater than the second target speed, the speed of the vehicle is adjusted to the second target speed, so as to control the driving of the vehicle according to the second target speed.

[0038] The present invention performs speed limiting only when it is identified that the current vehicle speed exceeds the target vehicle speed, thereby improving the efficiency of speed limiting for the vehicle.

[0039] In a second aspect, the present invention discloses a vehicle navigation speed limit system, including an information collection module, a speed limit matching module, a speed limit adjustment module and a speed limit module;

[0040] The information acquisition module is used to obtain the current driving information of the vehicle when the vehicle is in the pilot driving state; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and the current weather condition information;

[0041] The speed limit matching module is used to determine a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route;

[0042] The speed limit adjustment module is used to adjust the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value;

[0043] The speed limit module is used to limit the speed of the vehicle according to the second target vehicle speed value.

[0044] The present invention discloses a vehicle pilot speed limit system, which first determines a first target speed value of the vehicle based on the driving scene in the current driving information of the vehicle and the current pilot route, so that the first target speed value can meet the speed limit requirements in different scenes and the actual road section conditions in different routes, thereby improving the driving safety of the vehicle. Furthermore, the first target speed is further adjusted using the current weather status information of the vehicle during the pilot driving process, so that the vehicle can travel at a safer speed in potentially bad weather, further improving the driving safety of the vehicle during pilot driving.

[0045] In a third aspect, the present invention discloses an electronic device, comprising: one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement a vehicle navigation speed limit method as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 : A schematic flow chart of a vehicle navigation speed limit method disclosed in an embodiment of the present invention;

[0047] Figure 2 : is a structural schematic diagram of a vehicle navigation speed limit system disclosed in an embodiment of the present invention;

[0048] Figure 3 : A flow chart of a vehicle navigation speed limit method disclosed in another embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Embodiment 1

[0051] This embodiment discloses a vehicle navigation speed limit method to improve the safety of the vehicle during navigation driving. Figure 1 , mainly including steps 101 to 104, wherein the steps are mainly:

[0052] Step 101: when the vehicle is in a pilot driving state, obtaining current driving information of the vehicle; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and current weather condition information;

[0053] Step 102: determining a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route;

[0054] Step 103: adjusting the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value;

[0055] Step 104: Limiting the speed of the vehicle according to the second target vehicle speed value.

[0056] In the process of limiting the speed of the vehicle in the above steps 101 to 104, the corresponding target speed value is determined using the current driving scene and the current navigation route of the vehicle, so as to limit the speed of the vehicle in different driving scenes through the target speed value, thereby improving the safety of vehicle driving. Furthermore, after formulating a target speed that meets the driving scene, the target speed is further adjusted using the current weather status information to reduce the safety risk of vehicle driving in bad weather. Specifically, when limiting the speed of the vehicle, in order to ensure the accuracy of the speed limit and improve the safety of vehicle driving, the step 101 first needs to determine the scene in which the vehicle is currently located. Specifically, the process of scene determination in the step 101 is as follows:

[0057] Step 1011: Acquire current location information of the vehicle to determine a first current driving scene of the vehicle according to the location information; wherein the first current driving scene includes an urban driving scene and a high-speed driving scene;

[0058] Step 1012: When the vehicle is in an urban driving scenario, the road information of the road section where the vehicle is located is obtained according to the current navigation route of the vehicle to determine the second current driving scenario of the vehicle; wherein the second current driving scenario includes an intersection section driving scenario, a multi-lane section driving scenario and a speed limit section driving scenario.

[0059] In this embodiment, steps 1011 to 1012 take into account that the speed limit requirements corresponding to different scenarios are also different. Therefore, in order to more accurately execute different speed limit processes, the high-speed scenarios and urban scenarios are first classified, and then the scenes corresponding to different road sections in the urban area are classified, so that the target vehicle speed determined according to the classification is more in line with the actual driving conditions, thereby improving the safety of pilot driving.

[0060] Furthermore, after the scene determination is performed, based on different speed limit requirements corresponding to different scenes, in order to better improve the safety of the vehicle when performing automatic driving according to the current navigation route, the driving scene determined in step 101 is used to obtain the first target speed value corresponding to the vehicle. Specifically, the process of determining different first target speed values ​​corresponding to the vehicle according to different driving scenes in step 102 is as follows:

[0061] Step 1021: When it is determined that the vehicle is in a high-speed driving scene, identifying the high-speed driving lane where the vehicle is located according to the road information;

[0062] Step 1022: Obtain a first speed limit value corresponding to the high-speed driving lane, and determine the first speed limit value as a first target vehicle speed value corresponding to the vehicle.

[0063] Step 1023: when it is determined that the vehicle is in a driving scene at an intersection, obtaining the distance from the vehicle to the intersection of the road section where the vehicle is located according to the road information and the current position information;

[0064] Step 1024: When the distance is less than a preset distance threshold, the distance and the current driving speed of the vehicle are input into a pre-built vehicle speed limit adjustment model to obtain a first target vehicle speed value corresponding to the vehicle.

[0065] Step 1025: when it is determined that the vehicle is in a multi-lane road segment driving scenario, obtaining the number of lanes of the road segment where the vehicle is located according to the road information;

[0066] Step 1026: Acquire a second speed limit value that matches the number of lanes from pre-constructed lane speed limit information, and determine the second speed limit value as the first target vehicle speed value corresponding to the vehicle.

[0067] Step 1027: when it is determined that the vehicle is in a speed-limited road section, obtaining a third speed limit value corresponding to the road section where the vehicle is currently located from the road information;

[0068] Step 1028: Determine the third speed limit value as the first target vehicle speed value corresponding to the vehicle.

[0069] In this embodiment, steps 1021 to 1022 and steps 1027 to 1028 take into account that there are only high-speed vehicles in the highway section in the highway scene or urban scene. Therefore, in order to improve the efficiency of speed limit, the speed limit protection of the vehicle can be directly performed through the speed limit value corresponding to the lane to adapt to the speed limit requirements of high-speed driving on the highway route, thereby improving the safety of pilot driving in high-speed scenes.

[0070] Furthermore, the steps 1023 to 1026 respectively calculate the corresponding speed limit values ​​according to different sections of the vehicle in the urban scene. Specifically, when it is identified that the current section is an intersection in the urban area, considering that the intersection section requires the vehicle to slow down and the vehicle deceleration takes a certain amount of time, the target speed value is calculated according to the distance between the vehicle and the intersection, which can effectively ensure that the vehicle safely passes through the intersection of the section, thereby improving the safety of driving. When it is identified that it is in a multi-lane section, the target speed value of the vehicle is executed using the number of lanes, so as to limit the speed of the vehicle when it is driving on a section with multiple lanes, so as to reduce the safety risks caused by lane changes during vehicle driving, thereby improving the safety of vehicle driving.

[0071] Furthermore, in step 102, an initial first target speed value is formulated according to the driving scene corresponding to the vehicle to ensure the driving safety of the vehicle in different driving scenes. Based on the impact of weather conditions on the driving safety of the vehicle, in some implementations of this embodiment, the current weather status information of the vehicle may be obtained to further adjust the target speed to avoid safety hazards caused by bad weather. Specifically, the process of adjusting the target speed value according to the weather in step 103 is as follows:

[0072] Step 1031: determining the severity of the current weather according to the current weather status information;

[0073] Step 1032: Adjust the first target vehicle speed value downward according to the severity to obtain a second target vehicle speed value for the vehicle.

[0074] In this embodiment, step 1031 and step 1032 limit the vehicle's own driving speed according to the severity of the weather, and try to avoid safety hazards caused by bad weather, thereby better improving the safety of the vehicle during driving.

[0075] Finally, after the second target speed value corresponding to the vehicle is determined according to the current driving scene and the current weather of the vehicle, the target speed value is used to limit the speed of the vehicle, so that the vehicle travels according to the target speed value adapted to the current driving scene and weather, so as to improve driving safety. Specifically, the process of limiting the speed of the vehicle according to the second target speed value in step 104 is as follows:

[0076] Step 1041: acquiring the current driving speed of the vehicle, and comparing the current driving speed with the second target speed;

[0077] Step 1042: When the current driving speed is greater than the second target speed, the speed of the vehicle is adjusted to the second target speed to control the vehicle driving according to the second target speed.

[0078] In this embodiment, through step 1041 and step 1042, the speed limit is performed only when it is recognized that the current vehicle speed exceeds the target vehicle speed, thereby improving the efficiency of speed limit for the vehicle.

[0079] On the other hand, this embodiment also discloses a vehicle navigation speed limit system. For the specific structure of the navigation speed limit system, please refer to Figure 2 , including an information collection module 201, a speed limit matching module 202, a speed limit adjustment module 203 and a speed limit module 204.

[0080] The information acquisition module 201 is used to obtain the current driving information of the vehicle when the vehicle is in the pilot driving state; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and the current weather condition information.

[0081] The speed limit matching module 202 is used to determine a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route.

[0082] The speed limit adjustment module 203 is used to adjust the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value.

[0083] The speed limiting module 204 is used for limiting the speed of the vehicle according to the second target vehicle speed value.

[0084] According to Figure 1 A vehicle navigation speed limit method is shown in the figure. Accordingly, this embodiment provides an electronic device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the following is implemented Figure 1The pilot speed limit method for the vehicle shown in the figure. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The processor is the control center of the terminal, and various interfaces and lines are used to connect the various parts of the entire terminal. The memory may be used to store the computer program, and the processor implements various functions of the terminal by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Med ia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0085] Furthermore, this embodiment also provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the following Figure 1 The pilot speed limit method for the vehicle shown.

[0086] Among them, Figure 2If the pilot speed limit system of a vehicle shown is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment method can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0087] Compared with the prior art, the vehicle navigation speed limit method, system, device and medium provided in this embodiment have the following beneficial effects:

[0088] The present embodiment provides a vehicle pilot speed limit method, system, device and medium, which first determines a first target speed value of the vehicle based on the driving scene in the current driving information of the vehicle and the current pilot route, so that the first target speed value can meet the speed limit requirements in different scenes and the actual road section conditions in different routes, thereby improving the driving safety of the vehicle. Furthermore, the first target speed is further adjusted using the current weather status information of the vehicle during the pilot driving process, so that the vehicle can travel at a safer speed in potentially bad weather, further improving the driving safety of the vehicle during pilot driving.

[0089] Embodiment 2

[0090] When the vehicle is traveling on a memory route, the pilot driving system will take over from the driver to control the vehicle to perform automatic driving along the memory route. The pilot driving system will control the vehicle according to the vehicle speed output by the driver before the control of the vehicle is taken over or the historical speed of the vehicle in the memory route. When the vehicle is controlled using the speed output by the driver, it is impossible to adapt to the change of the vehicle's driving scene, and thus the safety of the vehicle's driving cannot be guaranteed. When the control is based on the vehicle's historical speed, due to the change of road conditions, the same driving route may be in different driving scenes, and different driving scenes have different driving conditions. In this regard, if the control is still based on the historical speed, there may be safety risks.

[0091] In order to solve the above technical problems and improve the safety of the vehicle when it is automatically driving according to the pilot control system, this embodiment provides a vehicle pilot speed limit method, which obtains the current driving scene and weather status information of the vehicle, and then adapts the corresponding vehicle speed value to the driving scene to improve the safety of vehicle driving. Specifically, please refer to the specific implementation process of the pilot speed limit method Figure 3 , mainly including steps 301 to 304:

[0092] Step 301: When the vehicle is in the pilot driving state, the current driving scene of the vehicle is determined and the current pilot route of the vehicle is obtained.

[0093] Specifically, when the vehicle is in pilot driving control, it is not possible to adaptively limit the speed according to the current environment, so that the driving safety of the vehicle cannot be guaranteed. In this regard, certain implementations provided in this embodiment first obtain the current driving scene of the vehicle when it is detected that the vehicle is in pilot driving state, so as to formulate a target speed that adapts to the driving scene, thereby improving the safety of the vehicle in the driving scene according to the target speed.

[0094] Preferably, when performing scene judgment, the current navigation route of the vehicle when it is in pilot driving can be obtained, and the current navigation route can be matched with the highway route or city route in the memory route saved by the vehicle. When it is determined that the current navigation route corresponds to the city route, the current driving scene of the vehicle is determined to be an urban scene, and when it is determined that the current navigation route corresponds to the highway route, the current driving scene of the vehicle is determined to be a highway scene.

[0095] It should be noted that the method of determining the scene based on the navigation route provided in some implementations of this embodiment is not the only method that can be used for scene identification. In other implementations, the current position information of the vehicle can also be determined based on GPS, and then compared with the position of the highway or urban road section to determine whether the vehicle is on the highway. If so, it is determined to be a highway, if not, it is determined to be a city road. The driving scene of the vehicle can also be identified based on image recognition, such as by determining whether the vehicle passes through a toll station, tunnel, etc.

[0096] Step 302: When it is determined that the vehicle is in a high-speed scenario, a first speed limit value corresponding to the lane where the vehicle is currently located is determined according to the current navigation route, and the first speed limit value is used as a first target speed value of the vehicle.

[0097] Specifically, when determining that the vehicle is in a high-speed scene, based on the fact that the high-speed scene is relatively simple, that is, there are only high-speed vehicles on the high-speed route, at this time, in order to improve the efficiency of speed limit, in certain implementations of this embodiment, the high-speed lane in which the vehicle is currently located can be identified to obtain the speed limit value corresponding to the high-speed lane, and then the speed limit value can be used as the target speed of the vehicle.

[0098] Preferably, when identifying the lane, the current navigation route of the vehicle is obtained, and then the starting point and end point corresponding to the current navigation route are obtained, and then GPS positioning can be used to obtain road information of the road section where the starting point and end point are located, and the road information generally includes road type, number of lanes, and speed limit information, and then the speed limit value corresponding to the current navigation route is obtained from the road information, and the speed limit value is determined as the first target speed value of the vehicle.

[0099] Step 303: When it is determined that the vehicle is in an urban scene, the road section scene where the vehicle is currently located is determined according to the current navigation route, so as to determine the second speed limit value corresponding to the vehicle according to the road section scene, and use the second speed limit value as the first target speed value of the vehicle.

[0100] Specifically, when determining that the vehicle is in an urban scene, the urban scene is relatively complex, with multiple types of driving sections, and different driving sections have different speed limit requirements. At this time, in order to improve the speed limit effect, that is, to improve the safety of vehicle driving, in some implementations of this embodiment, the driving scene of the vehicle is secondary judged, that is, the road type corresponding to the vehicle when driving in the urban area is identified.

[0101] Preferably, the historical memory route corresponding to the current pilot route is matched, and then the road type of the historical memory route is obtained from the information memorized by the vehicle, so as to determine the scene the vehicle is currently in according to the road type. For example, when the road type is an intersection section, the vehicle is determined to be in an intersection section driving scene; when the road type is a multi-lane section, the vehicle is determined to be in a multi-lane section driving scene; and when the road type is a speed-limited section, the vehicle is determined to be in a speed-limited section driving scene. In summary, the vehicle's driving scene is determined based on the road type corresponding to the current pilot route.

[0102] Furthermore, after determining the driving scenario of the vehicle within the urban area, in order to improve the effect of the speed limit, different speed limit values ​​are formulated for different driving scenarios to improve the safety of vehicle driving. In this regard, in certain implementations of this embodiment, when it is identified that the vehicle is traveling on a speed-limited section, the speed limit value corresponding to the speed-limited section is obtained, wherein the speed limit value includes an upper speed limit value and a lower speed limit value; and when it is identified that the vehicle is in a multi-lane section, the number of lanes is identified at this time, and the current corresponding speed limit value is determined based on the preset mapping relationship between the number of vehicles and the speed limit. For example, in a specific embodiment, the speed limit value corresponding to when the number of lanes is 1 is set to A, the speed limit value corresponding to when the number of lanes is 2 is set to B, the speed limit value corresponding to when the number of lanes is 3 is set to C, and the speed limit value corresponding to when the number of lanes is 4 is set to D. When the number of lanes is the number of lanes leading to the lane, since the more lanes there are, the more options are available for the vehicle to travel. At this time, the speed of the vehicle can increase with the increase in the number of lanes. For this, A is set. <B<C<D。

[0103] When it is identified that the driving section of the vehicle is an intersection section, the distance between the intersection that the vehicle is about to pass and the current position of the vehicle can be obtained from the current navigation route, and then speed limit protection is performed based on the distance; wherein, after obtaining the remaining distance between the vehicle and the intersection, if the remaining distance is lower than the preset distance (for example, 1km), the speed limit value can be determined based on the mapping relationship between the preset remaining distance and the speed limit. Wherein, the mapping relationship can be a linear relationship or a discrete relationship, preferably a linear relationship, so that the speed limit value can be smoothly adjusted. In a specific embodiment, an example of the linear relationship is: when the remaining distance between the vehicle and the intersection is 900 meters, the speed limit value of the vehicle is set to 80KM / h; when the remaining distance between the vehicle and the intersection is 600 meters, the speed limit value of the vehicle is set to 60KM / h; and when the remaining distance between the vehicle and the intersection is 300 meters, the speed limit value of the vehicle is set to 50KM / h. Thus, the speed limit value of the vehicle decreases as the remaining distance decreases.

[0104] After obtaining the speed limit values ​​corresponding to different road sections, the speed limit values ​​are determined as the first target speed value of the vehicle. Preferably, when the speed limit of the vehicle is set according to the above-mentioned various speed limit setting methods, the difference between adjacent speed limits should preferably not exceed 20 km / h to control the smooth transition of the vehicle speed. Among them, the preferred effect of 20 km / h is experienced by the actual vehicle, and the difference is set according to the chassis adjustment of each project vehicle.

[0105] Step 304: Obtain current weather status information to adjust the first target vehicle speed value to a second target vehicle speed value, and limit the speed of the vehicle according to the second target vehicle speed value.

[0106] Specifically, since weather conditions will affect the driving safety of the vehicle, in order to further ensure the driving safety of the vehicle, some implementations of this embodiment, after determining the first target vehicle speed according to the driving scenario, will also adjust the first target vehicle speed according to the weather condition information of the vehicle, so as to reduce the impact of bad weather on the driving of the vehicle. In this regard, in some implementations of this embodiment, the weather conditions can be detected, and the weather impact factor can be determined based on the weather conditions, and then the first target vehicle speed value can be adjusted to limit the speed of the vehicle according to the adjusted second target vehicle speed value.

[0107] Preferably, this embodiment does not provide means for obtaining weather influencing factors, nor does it impose restrictions on the weather influencing factors. For example, sensors may be used to detect the current temperature, current humidity, current visibility, etc.; an image acquisition device may be used to determine whether the vehicle is in rain, fog, snow, or other weather types; a visible light device may be used to detect whether the vehicle is driving during the day or at night, etc.

[0108] Furthermore, after obtaining the weather influencing factors, the adjustment degree of the first target vehicle speed value is determined by using the levels corresponding to the various weather influencing factors. When the temperature is lower, the humidity is lower or the visibility is lower, the first target vehicle speed value is adjusted downward. And when the corresponding degree of rain, fog and snow is greater, the first target vehicle speed value is adjusted downward. Preferably, when the second target vehicle speed values ​​adjusted corresponding to different weather influencing factors are different, the minimum vehicle speed value is selected from the second target vehicle speed values ​​as the final second target vehicle speed value.

[0109] After determining the second target speed value, the current driving speed of the vehicle is obtained, and the current driving speed is compared with the second target speed; when the current driving speed is greater than the second target speed, the speed of the vehicle is adjusted to the second target speed, so as to control the vehicle driving according to the second target speed, thereby improving the efficiency of speed limit.

[0110] The present embodiment provides a vehicle navigation speed limit method, which performs speed limit protection on the vehicle speed during navigation driving according to a memorized route to improve driving safety; when performing speed limit protection, it further distinguishes between highway and urban scenes, thereby making the speed limit protection more accurate; when formulating the speed limit value according to the scene, it further considers the impact of objective environmental factors and other information on driving safety, thereby making the speed limit value more accurate, thereby better improving the safety of vehicle driving.

[0111] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle navigation speed limit method, characterized in that: include: When the vehicle is in the pilot driving state, obtaining the current driving information of the vehicle; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and the current weather condition information; Determining a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route; Adjust the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value; The vehicle is speed-limited according to the second target vehicle speed value.

2. A vehicle navigation speed limit method according to claim 1, characterized in that: The obtaining of the current driving information of the vehicle includes: Acquire the current position information of the vehicle to determine the first current driving scene of the vehicle according to the position information; wherein the first current driving scene includes an urban driving scene and a high-speed driving scene; When the vehicle is in an urban driving scenario, road information of the road section where the vehicle is located is obtained according to the current navigation route of the vehicle to determine the second current driving scenario of the vehicle; wherein the second current driving scenario includes an intersection section driving scenario, a multi-lane section driving scenario and a speed limit section driving scenario.

3. A vehicle navigation speed limit method according to claim 2, characterized in that: The determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes: When it is determined that the vehicle is in a high-speed driving scene, identifying the high-speed driving lane where the vehicle is located according to the road information; A first speed limit value corresponding to the high-speed driving lane is acquired, and the first speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

4. The vehicle navigation speed limit method according to claim 2, characterized in that: The determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes: When it is determined that the vehicle is in a driving scene at an intersection, the distance from the vehicle to the intersection of the road section where the vehicle is located is obtained according to the road information and the current position information; When the distance is less than a preset distance threshold, the distance and the current driving speed of the vehicle are input into a pre-constructed vehicle speed limit adjustment model to obtain a first target vehicle speed value corresponding to the vehicle.

5. The vehicle navigation speed limiting method according to claim 2, characterized in that: The determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes: When it is determined that the vehicle is in a driving scene of a multi-lane road section, obtaining the number of lanes of the road section where the vehicle is located according to the road information; A second speed limit value matching the number of lanes is acquired from pre-constructed lane speed limit information, and the second speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

6. The vehicle navigation speed limiting method according to claim 2, characterized in that: The determining the first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route includes: When it is determined that the vehicle is in a speed-limited road section driving scenario, obtaining a third speed limit value of the road section where the vehicle is located from the road information; The third speed limit value is determined as a first target vehicle speed value corresponding to the vehicle.

7. The vehicle navigation speed limit method according to claim 1, characterized in that: The adjusting the first target vehicle speed value according to the current weather status information includes: Determine the severity of the current weather according to the current weather status information; The first target vehicle speed value is adjusted downward according to the severity to obtain a second target vehicle speed value of the vehicle.

8. The vehicle navigation speed limiting method according to claim 7, characterized in that: The limiting the speed of the vehicle according to the second target vehicle speed value includes: Acquiring a current driving speed of the vehicle, and comparing the current driving speed with the second target speed; When the current driving speed is greater than the second target speed, the speed of the vehicle is adjusted to the second target speed, so as to control the driving of the vehicle according to the second target speed.

9. A vehicle navigation speed limit system, characterized in that: It includes information collection module, speed limit matching module, speed limit adjustment module and speed limit module; The information acquisition module is used to obtain the current driving information of the vehicle when the vehicle is in the pilot driving state; wherein the current driving information includes the current driving scene of the vehicle, the current pilot route of the vehicle and the current weather condition information; The speed limit matching module is used to determine a first target vehicle speed value corresponding to the vehicle according to the driving scenario and the current navigation route; The speed limit adjustment module is used to adjust the first target vehicle speed value according to the current weather status information to obtain a second target vehicle speed value; The speed limit module is used to limit the speed of the vehicle according to the second target vehicle speed value.

10. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement a vehicle pilot speed limit method as described in any one of claims 1 to 8.

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