Vehicle speed limit early warning method and device, electronic equipment and medium

Abstract

The invention relates to the field of vehicles, in particular to a vehicle speed limit early warning method and device, electronic equipment and a medium. The vehicle speed limit early warning method comprises the following steps: responding to road speed limit information of a road test unit; the road speed limit information comprises speed limit information; determining a speed limit early warning level according to the road speed limit information, the vehicle driving information, a preset vehicle speed threshold value and a preset overspeed interval database; the vehicle driving information comprises a vehicle position and a vehicle speed, and the vehicle position comprises a lane to which the vehicle belongs; and according to the speed limit early warning grade, controlling to send vehicle speed limit early warning prompt information. According to the method, a camera does not need to be adopted, the reliability of early warning is improved, the method does not depend on a map navigation APP, the flexibility is higher, the scheme of the method is simple, the real-time performance and accuracy of early warning can be guaranteed, lane-level speed limit early warning can be achieved, a driver is effectively reminded through speed limit early warning prompt according to the speed limit early warning level, and the driving safety is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a vehicle speed limit warning method, device, electronic equipment and medium. Background Art

[0002] The vehicle speed limit warning system is designed to help drivers comply with road speed limit regulations through real-time monitoring and warning, thereby improving road safety and reducing traffic accidents. With the development of transportation technology, the system has become an important part of the intelligent transportation system.

[0003] Traditional vehicle speed limit warning systems are usually implemented through technologies such as GPS, cameras and speed sensors. The GPS module provides the vehicle's current location and driving speed information, while road sign recognition and map databases are used to obtain road speed limit information. The system compares the vehicle speed with the speed limit standard in real time and issues an alarm when speeding. Or when using map navigation, use the speed limit warning function of the map navigation APP for auxiliary speed limit warning reminders. In the above two methods, the use of cameras for image recognition is limited by weather and vehicle vision, and the recognition accuracy cannot be guaranteed, which in turn affects the accuracy of the warning. The use of map navigation APP requires the driver to keep the map navigation APP open, which is usually impossible for drivers to do in actual driving environments.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a vehicle speed limit warning method, device, electronic device and medium to solve the problems of poor speed limit warning accuracy, over-reliance on map navigation APP and poor flexibility in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a vehicle speed limit warning method, comprising: Responding to the road speed limit information of the road test unit; the road speed limit information includes speed limit information; Determine the speed limit warning level according to the road speed limit information, vehicle driving information, a preset speed threshold and a preset speeding interval database; the vehicle driving information includes the vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; According to the speed limit warning level, control is performed to issue a vehicle speed limit warning prompt message.

[0007] As a further preferred technical solution, the speed limit warning level is determined according to the road speed limit information, vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database, including: Determining the speed limit value of the lane to which the vehicle belongs according to the road speed limit information and the vehicle position in the vehicle driving information; Determine the speeding interval to which the vehicle speed belongs according to the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database; The speed limit warning level is determined according to the speeding interval to which the vehicle speed belongs.

[0008] As a further preferred technical solution, determining the speeding interval to which the vehicle speed belongs according to the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset speed threshold and a preset speeding interval database includes: Determine whether the vehicle speed in the vehicle driving information is lower than a preset vehicle speed threshold; When the vehicle speed is lower than the preset vehicle speed threshold, determining that the vehicle speed does not belong to any speeding interval and not making a speed limit warning level determination; When the vehicle speed is greater than the preset vehicle speed threshold, the speeding interval to which the vehicle speed belongs is determined according to the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database.

[0009] As a further preferred technical solution, determining the speeding interval to which the vehicle speed belongs based on the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database includes: Determining a speeding percentage according to the vehicle speed and the speed limit of the lane to which the vehicle belongs; The speeding interval to which the vehicle speed belongs is determined according to the speeding percentage and a preset speeding interval database.

[0010] As a further preferred technical solution, after controlling the issuance of the vehicle speed limit warning prompt information according to the speed limit warning level, it also includes: looping and executing the first target operation until the vehicle exits the current speed limit section; The first target operation includes: Determine whether the vehicle is located in the current speed limit section; When the vehicle is located at the current speed limit section, a loop is executed to determine an updated speed limit warning level based on the road speed limit information and the updated vehicle driving information; and according to the updated speed limit warning level, an operation of controlling the issuance of updated vehicle speed limit warning prompt information is performed.

[0011] As a further preferred technical solution, the road speed limit information also includes a starting position of a speed limit section and an end position of a speed limit section, and the determination of whether the vehicle is located in the current speed limit section includes: When receiving the road speed limit information of the road test unit within the signal sampling interval, determining that the vehicle is located in the current speed limit section; When no road speed limit information is received from the road test unit within the signal sampling interval, it is determined whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the end position of the speed limit section and the vehicle position.

[0012] As a further preferred technical solution, judging whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the ending position of the speed limit section and the vehicle position includes: Determining the distance between the vehicle and the starting point of the speed limit section according to the starting point of the speed limit section and the position of the vehicle; Determining the distance between the vehicle and the end point of the speed limit section according to the end point position of the speed limit section and the vehicle position; Determine the distance between the starting point of the speed limited section and the end point of the speed limited section according to the starting point of the speed limited section and the end point of the speed limited section; Determine whether the vehicle is located in the current speed limit section based on the distance between the vehicle and the starting point of the speed limit section, the distance between the vehicle and the end point of the speed limit section, and the distance between the starting point of the speed limit section and the end point of the speed limit section.

[0013] In a second aspect, the present invention provides a vehicle speed limit warning device, comprising: A warning level determination module, responding to the road speed limit information of the road test unit; the road speed limit information includes speed limit information; determining the speed limit warning level according to the road speed limit information, vehicle driving information, a preset speed threshold and a preset speeding interval database; the vehicle driving information includes the vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; The warning information issuing module is used to control the issuance of vehicle speed limit warning prompt information according to the speed limit warning level.

[0014] In a third aspect, the present invention provides an electronic device, comprising: at least one processor, and a memory communicatively coupled to at least one of the processors; The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors so that at least one of the processors can perform the above method.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The vehicle speed limit warning method provided by the present invention includes responding to the road speed limit information of the road test unit; the road speed limit information includes speed limit information; according to the road speed limit information, vehicle driving information, preset speed threshold and preset speeding interval database, the speed limit warning level is determined; the vehicle driving information includes vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; according to the speed limit warning level, the vehicle speed limit warning prompt information is controlled to be issued. The method does not need to use a camera, avoids the problem of poor warning accuracy caused by the camera due to weather or field of view limitations, improves the reliability of the warning, and does not rely on the map navigation APP, and has higher flexibility. The method is based on the road speed limit information of a specific road test unit, the specific vehicle driving information, the preset speed threshold and the preset speeding interval database for speed limit warning. The scheme is simple, can ensure the real-time and accuracy of the warning, and can realize lane-level speed limit warning. The speed limit warning prompt according to the speed limit warning level can effectively remind the driver and improve driving safety.

[0017] Furthermore, the method determines the speeding percentage and the speeding interval to which the vehicle speed belongs in a specific manner, making the speed limit warning more detailed and accurate.

[0018] Furthermore, the method determines whether the vehicle is located in the current speed limit section in a specific manner, accurately determines the end point of the speed limit warning, and avoids the occurrence of speed limit omissions and false alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a flow chart of the vehicle speed limit warning method provided by the present invention; Figure 2 It is a structural schematic diagram of the vehicle speed limit warning device provided by the present invention; Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0021] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0022] As mentioned in the background technology, the existing technology has the problems of poor speed limit warning accuracy, over-reliance on map navigation APP, and poor flexibility. In this regard, the present invention determines the speed limit warning level based on the road speed limit information of the road test unit and the vehicle driving information, and then issues the vehicle speed limit warning prompt information according to the speed limit warning level. The road speed limit information of the road test unit can be collected in real time during the vehicle driving process, without relying on the camera and map navigation APP, which improves the warning accuracy and flexibility. The present invention is further described in detail below in conjunction with the embodiments.

[0023] Example 1 Figure 1 This is a flow chart of a vehicle speed limit warning method provided by this embodiment. This embodiment is applicable to speed limit warning during vehicle driving. This method can be executed by a vehicle speed limit warning device, which can be composed of software and / or hardware and is generally integrated in an electronic device, which can be a vehicle controller, a vehicle computer or other mobile terminal (such as a smart phone, a tablet computer, etc.). For ease of understanding, each step in the vehicle speed limit warning method of this embodiment is executed by the vehicle controller.

[0024] like Figure 1 As shown, this embodiment provides a vehicle speed limit warning method, comprising the following steps: S110, responding to road speed limit information of a road test unit; the road speed limit information includes speed limit information.

[0025] The vehicle speed limit warning method of this embodiment executes subsequent steps after responding to the road speed limit information of the road test unit. The road test unit usually broadcasts the road speed limit information. In this embodiment, the V2X device can be used to receive / collect the road speed limit information of the road test unit. The V2X device supports short-range wireless communication technology. As long as the road speed limit information is received within its receivable distance range, it can be considered that the vehicle is in a speed limit section. It can be understood that the road test unit is communicatively connected to the V2X device of the vehicle, and the V2X device of the vehicle is communicatively connected to the vehicle speed limit warning device of the present invention (specifically, the warning level determination module therein). After the V2X device of the vehicle receives the road speed limit information of the road test unit, it sends the road speed limit information to the vehicle speed limit warning device.

[0026] The speed limit information includes the speed limit value of the road section, or the speed limit value of each lane in the road section. In some examples, the speed limit information is, for example, a speed limit value of 80km / h in a certain road section, or a speed limit value of 90km / h in the first lane in a certain road section, a speed limit value of 110km / h in the second lane in a certain road section, and a speed limit value of 120km / h in the third lane in a certain road section, and includes the left and right position descriptions of the first lane, the second lane, and the third lane.

[0027] S120, determining a speed limit warning level according to the road speed limit information, vehicle driving information, a preset speed threshold and a preset speeding interval database; the vehicle driving information includes a vehicle position and a vehicle speed, and the vehicle position includes a lane to which the vehicle belongs.

[0028] Among them, "vehicle driving information" refers to information that characterizes the driving status of the vehicle, which can be obtained by the V2X device, wherein the lane to which the vehicle belongs can be extracted from the on-board high-precision map information, and the lane to which the vehicle belongs is, for example, the first lane, the second lane, or the third lane. "Preset speed threshold" refers to a pre-set speed threshold used to characterize that the possibility of speeding when the vehicle is driving on the road is 0 (for example, it can be 10km / h). "Preset speeding interval database" refers to a pre-configured database for determining the speeding interval to which the vehicle speed belongs. The database may contain a correspondence between a speed limit value and a speeding interval (the speeding interval is an interval that includes the vehicle speed), or a correspondence between a speeding percentage and a speeding interval (the speeding interval is an interval that includes the speeding percentage).

[0029] This step determines the speed limit warning level based on the above-mentioned road speed limit information, vehicle driving information, preset speed threshold and preset speeding interval database, wherein the vehicle driving information includes the vehicle position, and the vehicle position includes the lane to which the vehicle belongs. That is, this step combines the lane to which the vehicle belongs, the vehicle speed, the road speed limit information, the preset speed threshold and the preset speeding interval database to determine the speed limit warning level. Compared with the method of issuing warnings only based on vehicle speed, on the one hand, it increases the considerations for warnings, and on the other hand, it also divides the warning levels, so that the speed limit warnings are more targeted and more accurate.

[0030] Furthermore, the determining of the speed limit warning level according to the road speed limit information, vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database includes: Determining the speed limit value of the lane to which the vehicle belongs according to the road speed limit information and the vehicle position in the vehicle driving information; Determine the speeding interval to which the vehicle speed belongs according to the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database; The speed limit warning level is determined according to the speeding interval to which the vehicle speed belongs.

[0031] The above-mentioned road speed limit information includes speed limit information, which may include speed limit values ​​of each lane (in this case, it indicates that the speed limit value is associated with the lane), or may be only the speed limit value (in this case, it indicates that the speed limit value is not associated with the lane, that is, each lane adopts the same speed limit value). Regardless of whether the speed limit value is associated with the lane, the speed limit value of the lane to which the vehicle belongs can be determined from the speed limit information and the vehicle position in the vehicle driving information. For example, if the speed limit information is 80km / h for the first lane and 60km / h for the second lane, and the vehicle position is located in the first lane, then the speed limit value of the lane to which the vehicle belongs is determined to be 80km / h; or, if the speed limit information is 60km / h and the vehicle position is located in the first lane, then the speed limit value of the lane to which the vehicle belongs is determined to be 60km / h. Then, the speed limit interval to which the vehicle speed belongs is determined based on the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, the preset vehicle speed threshold, and the preset speeding interval database, and finally the speed limit warning level is determined based on the speeding interval to which the vehicle speed belongs.

[0032] In the process of determining the speed limit warning level according to the speeding interval to which the above-mentioned vehicle speed belongs, the speed limit warning level corresponding to different speeding intervals can be preset in the vehicle controller, that is, by querying the preset speed limit warning level corresponding to the speeding interval to which the above-mentioned vehicle speed belongs, the required speed limit warning level can be obtained. In this method, different vehicle speeds may belong to the same speeding interval, so the speed limit warning level obtained in this way may be the same level for different vehicle speeds. To a certain extent, the warning accuracy of this method is also slightly weak. Therefore, this embodiment preferably adopts the following method to determine the speed limit warning level: if the above-mentioned vehicle speed is equal to the lower limit value of the speeding interval, the speed limit warning level is determined to be the speed limit warning level corresponding to the speeding interval; if the above-mentioned vehicle speed is not equal to the lower limit value of the speeding interval, the corresponding speed limit warning level is determined according to the linear interpolation algorithm, and the speed limit warning level calculation method is as follows: ,in, Speed ​​limit warning level. is the speed limit warning level of the current speeding interval, is the speed limit warning level for the next speeding interval, is the vehicle speed, is the lower speed limit of the current speeding interval, The speed limit warning level is 0~100, such as 0, 1, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 or 100, etc. The larger the speed limit warning level value, the more serious the speeding situation of the vehicle.

[0033] In an optional implementation, determining the speeding interval to which the vehicle speed belongs based on the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset speed threshold, and a preset speeding interval database includes: Determine whether the vehicle speed in the vehicle driving information is lower than a preset vehicle speed threshold; When the vehicle speed is lower than the preset vehicle speed threshold, determining that the vehicle speed does not belong to any speeding interval and not making a speed limit warning level determination; When the vehicle speed is greater than the preset vehicle speed threshold, the speeding interval to which the vehicle speed belongs is determined according to the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database.

[0034] In this embodiment, it is first determined whether the vehicle speed is lower than a preset speed threshold (e.g., 10 km / h). If it is lower than the preset speed threshold, it means that the vehicle is in a low-speed driving state and does not belong to any speeding interval, so there is no need to determine the speed limit warning level. If it is higher than the preset speed threshold, it means that the vehicle is not in a low-speed driving state, and it is necessary to determine the speeding interval to which the vehicle speed belongs based on the vehicle speed in the vehicle driving information, the speed limit value of the lane to which the vehicle belongs, and the preset speeding interval database. This method can avoid the warning level determination when the vehicle is in a low-speed driving state and reduce the amount of calculation.

[0035] In an optional implementation, when the database contains a correspondence between speed limit values ​​and speeding intervals, the speeding interval to which the vehicle speed belongs is determined based on the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database, including: matching the speed limit value of the lane to which the vehicle belongs with the speed limit value in the database to obtain the corresponding speed limit value; then querying the speeding interval corresponding to the vehicle speed in the vehicle driving information under the corresponding speed limit value (the speeding interval is a vehicle speed numerical interval) to obtain the desired speeding interval. Exemplarily, if the speed limit of the lane to which the vehicle belongs is 80km / h, and the speed limit values ​​in the database include 40km / h, 60km / h, 70km / h, 80km / h, 100km / h, 110km / h, and 120km / h, then the corresponding speed limit is determined to be 80km / h; if the vehicle speed in the above vehicle driving information is 85km / h, then the speeding interval corresponding to 85km / h under the speed limit of 80km / h is queried. For example, the preset speeding intervals under the speed limit of 80km / h include [80,90), [90,100), [110,120), etc., then the speeding interval corresponding to 85km / h is [80,90).

[0036] In another optional implementation, determining the speeding interval to which the vehicle speed belongs based on the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database includes: Determining a speeding percentage according to the vehicle speed and the speed limit of the lane to which the vehicle belongs; The speeding interval to which the vehicle speed belongs is determined according to the speeding percentage and a preset speeding interval database.

[0037] This embodiment introduces the speeding percentage, and determines the speeding interval to which the vehicle speed belongs according to the speeding percentage. Compared with the above-mentioned method, the preset speeding interval database does not need to store too many speed limit values ​​and speeding intervals that directly include speeds, and occupies less space. For example, if the vehicle speed in the above-mentioned vehicle driving information is 85km / h, and the speed limit value of the lane to which the vehicle belongs is 80km / h, then the speeding percentage is determined to be (85-80) / 80=6.25%, and the preset speeding intervals in the preset speeding interval database include [0,10%), [10%,20%), [20%,30%), etc., then the speeding interval to which the vehicle speed belongs is [0,10%).

[0038] It can be understood that the overspeed interval in this embodiment refers to an interval containing an overspeed percentage, such as [0, 10%), [10%, 20%), [20%, 30%), etc.

[0039] The overspeed interval in the above two optional implementation modes may be up to 1 times the speed limit value.

[0040] S130: Controlling the issuance of vehicle speed limit warning prompt information according to the speed limit warning level.

[0041] The above speed limit warning level corresponds to the vehicle speed limit warning prompt information. The higher the speed limit warning level, the stronger the signal of the vehicle speed limit warning prompt information. The vehicle speed limit warning prompt information can be specifically issued by the vehicle-mounted interactive terminal, such as using a terminal such as an LCD instrument, a steering wheel, and a central control screen. The prompt form includes sound, light, vibration, text, etc. In the present invention, the warning information issuing module in the vehicle speed limit warning device sends the vehicle speed limit warning prompt information to the vehicle-mounted interactive terminal, so that the vehicle-mounted interactive terminal sends the prompt information to the user for viewing. The above vehicle speed limit warning prompt information may include the speed limit warning level, or the speed limit warning level and the speeding percentage.

[0042] Furthermore, this embodiment further includes after S130: looping and executing the first target operation until the vehicle exits the current speed-limited road section; The first target operation includes: Determine whether the vehicle is located in the current speed limit section; When the vehicle is located at the current speed limit section, a loop is executed to determine an updated speed limit warning level based on the road speed limit information and the updated vehicle driving information; and according to the updated speed limit warning level, an operation of controlling the issuance of updated vehicle speed limit warning prompt information is performed.

[0043] In this embodiment, after receiving the road speed limit information from the road test unit, the vehicle needs to cyclically determine whether the vehicle is located in the current speed limit section. If it is located in the current speed limit section, it cyclically executes the operation of determining the updated speed limit warning level according to the road speed limit information and the updated vehicle driving information; according to the updated speed limit warning level, it controls the operation of issuing the updated vehicle speed limit warning prompt information. This method can ensure real-time judgment within the current speed limit section, especially when the vehicle changes lanes and the speed limit information includes the speed limit values ​​of each lane, it can give more accurate vehicle speed limit warning prompt information to avoid misjudgment.

[0044] It should be noted that the specific implementation method of "determining an updated speed limit warning level based on the road speed limit information and the updated vehicle driving information; and controlling the operation of issuing an updated vehicle speed limit warning prompt information based on the updated speed limit warning level" is the same as the implementation method of S120 and S140.

[0045] It is understandable that when the vehicle is no longer located in the current speed limit section, the speed limit warning for the speed limit section is terminated.

[0046] Furthermore, the road speed limit information also includes a starting position of a speed limit section and an end position of a speed limit section, and the determining whether the vehicle is located in the current speed limit section includes: When receiving the road speed limit information of the road test unit within the signal sampling interval, determining that the vehicle is located in the current speed limit section; When no road speed limit information is received from the road test unit within the signal sampling interval, it is determined whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the end position of the speed limit section and the vehicle position.

[0047] Since the deployment of road test units on the road is not too dense, the receiving distance of V2X is only 300 meters, but the speed limit section is tens of kilometers or even hundreds of kilometers. Therefore, it is not possible to judge whether the vehicle is still in the current speed limit section only by receiving the road speed limit information from the road test unit. Therefore, additional information is needed to judge whether the vehicle is still traveling in the current speed limit section. Therefore, this embodiment uses whether the road speed limit information of the road test unit is received within the signal sampling interval as the judgment basis. If so, it must be located in the current speed limit section. If not, it is further combined with the starting position of the speed limit section, the end position of the speed limit section and the vehicle position to judge whether the vehicle is located in the current speed limit section.

[0048] Further, judging whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the ending position of the speed limit section and the vehicle position includes: Determining the distance between the vehicle and the starting point of the speed limit section according to the starting point of the speed limit section and the position of the vehicle; Determining the distance between the vehicle and the end point of the speed limit section according to the end point position of the speed limit section and the vehicle position; Determine the distance between the starting point of the speed limited section and the end point of the speed limited section according to the starting point of the speed limited section and the end point of the speed limited section; Determine whether the vehicle is located in the current speed limit section based on the distance between the vehicle and the starting point of the speed limit section, the distance between the vehicle and the end point of the speed limit section, and the distance between the starting point of the speed limit section and the end point of the speed limit section.

[0049] Among them, vehicles The starting point of the speed limit section The distance between The following formula can be used for calculation: , R is the radius of the Earth, , . is the vehicle position, is the starting point of the speed limit section. is the vehicle longitude, is the vehicle latitude, is the longitude of the starting point of the speed limit section, is the latitude of the starting point of the speed limit section.

[0050] vehicle The end point of the speed limit section The distance between The following formula can be used for calculation: , R is the radius of the Earth, ， . is the end point of the speed limit section. is the end longitude of the speed limit section, is the latitude of the end point of the speed limit section.

[0051] Starting point of the speed limit section and the end point of the speed limit section The distance between The following formula can be used for calculation: , R is the radius of the Earth, , .

[0052] like + Less than or equal to , it is determined that the vehicle is located in the current speed limit section. Otherwise, the vehicle is no longer located in the current speed limit section, and the speed limit warning for this speed limit section is terminated.

[0053] The above-mentioned vehicle speed limit warning method includes responding to the road speed limit information of the road test unit; the road speed limit information includes speed limit information; according to the road speed limit information, vehicle driving information, preset speed threshold and preset speeding interval database, the speed limit warning level is determined; the vehicle driving information includes vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; according to the speed limit warning level, the vehicle speed limit warning prompt information is controlled to be issued. This method does not need to use a camera, avoids the problem of poor warning accuracy caused by the camera due to weather or field of view limitations, improves the reliability of the warning, and does not rely on the map navigation APP, which is more flexible. The method is based on the road speed limit information of a specific road test unit\specific vehicle driving information, preset speed threshold and preset speeding interval database for speed limit warning. The scheme is simple, can ensure the real-time and accuracy of the warning, and can realize lane-level speed limit warning. The speed limit warning prompt according to the speed limit warning level can effectively remind the driver and improve driving safety.

[0054] Furthermore, the method determines the speeding percentage and the speeding interval to which the vehicle speed belongs in a specific manner, making the speed limit warning more detailed and accurate.

[0055] Furthermore, the method determines whether the vehicle is located in the current speed limit section in a specific manner, accurately determines the end point of the speed limit warning, and avoids the occurrence of speed limit omissions and false alarms.

[0056] Example 2 like Figure 2 As shown, this embodiment provides a vehicle speed limit warning device, including: The warning level determination module 201 responds to the road speed limit information of the road test unit; the road speed limit information includes speed limit information; according to the road speed limit information, vehicle driving information, a preset speed threshold and a preset speeding interval database, the speed limit warning level is determined; the vehicle driving information includes the vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; The warning information issuing module 202 is used to control the issuance of vehicle speed limit warning prompt information according to the speed limit warning level.

[0057] The device is used to execute the above method, and thus has at least functional modules and beneficial effects corresponding to the above method.

[0058] Example 3 like Figure 3 As shown, this embodiment provides an electronic device, including: at least one processor; and a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to perform the above method. At least one processor in the electronic device can perform the above method, and thus has at least the same advantages as the above method.

[0059] Optionally, the electronic device also includes interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on a memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to an interface). In other embodiments, if necessary, multiple processors can be used together with multiple memories, and / or multiple buses can be used together with multiple memories. Similarly, multiple electronic devices can be connected (for example, as a server array, a group of blade servers, or a multi-processor system), and each device provides some necessary operations. Figure 3 A processor 301 is taken as an example.

[0060] The memory 302, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the vehicle speed limit warning method in the embodiment of the present invention (for example, the warning level determination module and the warning information issuance module in the vehicle speed limit warning device). The processor 301 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 302, that is, realizing the above-mentioned vehicle speed limit warning method.

[0061] The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 302 may further include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0062] The electronic device may further include: an input device 303 and an output device 304. The processor 301, the memory 302, the input device 303 and the output device 304 may be connected via a bus or other means. Figure 3 The example of connecting through bus is taken in the following.

[0063] The input device 303 can receive input digital or character information, and the output device 304 can include a display device, an auxiliary lighting device (e.g., LED), and a tactile feedback device (e.g., a vibration motor), etc. The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0064] Example 4 This embodiment provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method. The computer instructions on the computer-readable storage medium are used to enable a computer to execute the above method, and thus have at least the same advantages as the above method.

[0065] The medium in the present invention may adopt any combination of one or more computer-readable media. The medium may be a computer-readable signal medium or a computer-readable storage medium. The medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of the medium (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device, or device.

[0066] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0067] The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

[0068] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0069] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0070] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A vehicle speed limit warning method, characterized in that: include: Respond to the road speed limit information of the road test unit; The road speed limit information includes speed limit information; Determine the speed limit warning level according to the road speed limit information, vehicle driving information, preset vehicle speed threshold and preset speeding interval database; The vehicle driving information includes the vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; According to the speed limit warning level, control is performed to issue a vehicle speed limit warning prompt message.

2. The vehicle speed limit warning method according to claim 1, characterized in that: Determining the speed limit warning level according to the road speed limit information, vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database includes: Determining the speed limit value of the lane to which the vehicle belongs according to the road speed limit information and the vehicle position in the vehicle driving information; Determine the speeding interval to which the vehicle speed belongs according to the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database; The speed limit warning level is determined according to the speeding interval to which the vehicle speed belongs.

3. The vehicle speed limit warning method according to claim 2, characterized in that: The determining, based on the speed limit value of the lane to which the vehicle belongs, the vehicle speed in the vehicle driving information, a preset vehicle speed threshold, and a preset speeding interval database, includes: Determine whether the vehicle speed in the vehicle driving information is lower than a preset vehicle speed threshold; When the vehicle speed is lower than the preset vehicle speed threshold, determining that the vehicle speed does not belong to any speeding interval and not making a speed limit warning level determination; When the vehicle speed is greater than the preset vehicle speed threshold, the speeding interval to which the vehicle speed belongs is determined according to the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database.

4. The vehicle speed limit warning method according to claim 3, characterized in that: The determining, based on the vehicle speed, the speed limit value of the lane to which the vehicle belongs, and a preset speeding interval database, of the speeding interval to which the vehicle speed belongs includes: Determining a speeding percentage according to the vehicle speed and the speed limit of the lane to which the vehicle belongs; The speeding interval to which the vehicle speed belongs is determined according to the speeding percentage and a preset speeding interval database.

5. The vehicle speed limit warning method according to claim 1, characterized in that: After controlling the issuance of the vehicle speed limit warning prompt information according to the speed limit warning level, the method further includes: looping and executing the first target operation until the vehicle exits the current speed limit section; The first target operation includes: Determine whether the vehicle is located in the current speed limit section; When the vehicle is located at the current speed limit section, a loop is executed to determine an updated speed limit warning level based on the road speed limit information and the updated vehicle driving information; and according to the updated speed limit warning level, an operation of controlling the issuance of updated vehicle speed limit warning prompt information is performed.

6. The vehicle speed limit warning method according to claim 5, characterized in that: The road speed limit information also includes the starting position of the speed limit section and the ending position of the speed limit section. The determining whether the vehicle is located in the current speed limit section includes: When receiving the road speed limit information of the road test unit within the signal sampling interval, determining that the vehicle is located in the current speed limit section; When no road speed limit information is received from the road test unit within the signal sampling interval, it is determined whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the end position of the speed limit section and the vehicle position.

7. The vehicle speed limit warning method according to claim 6, characterized in that: The determining whether the vehicle is located in the current speed limit section according to the starting position of the speed limit section, the ending position of the speed limit section and the vehicle position includes: Determining the distance between the vehicle and the starting point of the speed limit section according to the starting point of the speed limit section and the position of the vehicle; Determining the distance between the vehicle and the end point of the speed limit section according to the end point position of the speed limit section and the vehicle position; Determine the distance between the starting point of the speed limited section and the end point of the speed limited section according to the starting point of the speed limited section and the end point of the speed limited section; Determine whether the vehicle is located in the current speed limit section based on the distance between the vehicle and the starting point of the speed limit section, the distance between the vehicle and the end point of the speed limit section, and the distance between the starting point of the speed limit section and the end point of the speed limit section.

8. A vehicle speed limit warning device, characterized in that: include: A warning level determination module, responding to the road speed limit information of the road test unit; The road speed limit information includes speed limit information; determining a speed limit warning level according to the road speed limit information, vehicle driving information, a preset vehicle speed threshold and a preset speeding interval database; The vehicle driving information includes the vehicle position and speed, and the vehicle position includes the lane to which the vehicle belongs; The warning information issuing module is used to control the issuance of vehicle speed limit warning prompt information according to the speed limit warning level.

9. An electronic device, characterized in that: include: at least one processor, and a memory communicatively coupled to at least one of the processors; The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors so that the at least one processor can execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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