CN108564803B - Vehicle overspeed reminding method and system - Google Patents
Vehicle overspeed reminding method and system Download PDFInfo
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Abstract
The invention discloses a vehicle overspeed reminding method and a vehicle overspeed reminding system, wherein on a high-speed photovoltaic road, the method comprises the following steps: collecting an image of a road in front of a vehicle; obtaining the number of lanes and the lane where the vehicle is located according to the image; acquiring vehicle type information of a vehicle; obtaining the speed limit value of the vehicle according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the prestored expressway information table; measuring a real-time speed of the vehicle; and judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding. According to the vehicle overspeed reminding method and system provided by the invention, on a high-speed photovoltaic road, the number of lanes and the current lane of the vehicle are obtained by analyzing the image of the road in front of the vehicle, the speed limit value can be dynamically adjusted according to the current lane of the vehicle, and accurate speed limit information can be obtained.
Description
Technical Field
The invention belongs to the field of automobile safe driving assistance, and particularly relates to a vehicle overspeed reminding method and system.
Background
The photovoltaic highway is provided with the photovoltaic panel, solar energy is converted into electric energy to supply power for the photovoltaic highway, the electric energy acquired by the power supply mode is influenced by illumination intensity, when the illumination intensity is high, the acquired electric energy is high, and when the illumination intensity is low, the acquired electric energy is low. For a photovoltaic panel in a fixed area, the illumination intensity on the photovoltaic panel is stable when no vehicle passes by, and the acquired electric signal is also stable, when a vehicle passes by, the illumination intensity on the photovoltaic panel is gradually weakened to a minimum value and then gradually strengthened to a stable value, and similarly, the acquired electric signal is also gradually weakened to a minimum value and then gradually strengthened to a stable value. Therefore, the change of the electric signal acquired by the photovoltaic panel can be obtained by monitoring the change of the illumination intensity on the photovoltaic panel, and conversely, the change of the illumination intensity on the photovoltaic panel can also be obtained by monitoring the change of the electric signal acquired by the photovoltaic panel. The illumination intensity on the photovoltaic panel is influenced by the passing vehicle, the sheltering object and the like besides the influence of weather, and similarly, the electric signal acquired by the photovoltaic panel is also influenced by the passing vehicle.
In the regulations for implementing the road traffic safety laws of the people's republic of China, speed limitation is performed on different roads according to conditions such as road types, traffic flow, road widths, isolation zone conditions and the like, and the condition that the visibility of a driver is reduced, the running distance of the vehicle is increased within the reaction time of the driver and the braking distance is increased due to overspeed running of the vehicle. The accident occurrence probability is increased, the accident severity is increased, and the safety performance of the vehicle is influenced. In the actual situation, speed limits of different lanes in the same place, particularly on a highway, may be different, and the existing overspeed reminding system cannot provide accurate speed limit information for a driver. The regulations for the implementation of the road traffic safety law of the people's republic of China are also applicable to the high-speed photovoltaic highways.
Application No. 201610296752.6 discloses a vehicle overspeed reminding method and system, the method of the patent comprises: collecting an image of a road in front of a vehicle; obtaining the number of lanes and the lane where the vehicle is located according to the image; acquiring vehicle type information of a vehicle; obtaining the speed limit value of the vehicle according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the prestored expressway information table; measuring a real-time speed of the vehicle; and judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding.
Disclosure of Invention
The invention aims to provide a vehicle overspeed reminding method and a vehicle overspeed reminding system aiming at providing more accurate speed limiting information and acquiring more accurate vehicle running speed by monitoring the electric signal change of a photovoltaic panel.
In order to achieve the purpose, the invention provides a vehicle overspeed reminding method and a vehicle overspeed reminding system, wherein on a high-speed photovoltaic highway, the method comprises the following steps:
step 1, collecting an image of a road in front of a vehicle;
step 2, obtaining the number of lanes and the lane where the vehicle is located according to the image;
step 4, obtaining the speed limit value of the vehicle according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the prestored expressway information table;
and 6, judging whether the real-time speed of the vehicle is greater than the speed limit value, and if so, sending out overspeed reminding.
Preferably, the method further comprises the following steps:
acquiring position information of a vehicle, and judging whether a road where the vehicle is located is a high-speed photovoltaic road; if yes, executing the step of acquiring the image of the road in front of the vehicle; if not, acquiring a speed limit value of the vehicle according to prestored electronic map information, acquiring the real-time speed of the vehicle running through the photovoltaic panel by monitoring the electric signal change of the photovoltaic panel, judging whether the real-time speed of the vehicle is greater than the speed limit value, and if so, sending overspeed reminding.
Preferably, step 2 further comprises the steps of:
detecting lane lines according to the images and a preset lane line detection algorithm, judging the number n1 of the lane lines on the left side of the vehicle and the number n2 of the lane lines on the right side of the vehicle, and calculating to obtain the number n of lanes which is n1+ n2-1, so that the current lane m of the vehicle is n1 counted from the left side of the driving direction of the vehicle, wherein when the number of the lane lines is judged, the emergency lane is not counted up due to the fact that the width of the emergency lane is different from the width of the driving lane.
Preferably, the preset lane line detection algorithm is a model matching method or a feature detection method.
In addition, in order to achieve the above object, the present invention further provides a vehicle overspeed reminding system, which comprises:
the road information acquisition module receives the starting instruction and acquires an image of a road in front of the vehicle;
the lane judging module is used for obtaining the number of lanes and the lane where the vehicle is located according to the image;
the vehicle information acquisition module is used for acquiring the model information of the vehicle according to the input vehicle model;
the high-speed limit adjusting module is used for obtaining the speed limit value of the vehicle according to the number of the lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the preset expressway information table;
the speed measuring module is used for measuring the real-time speed of the vehicle, comprises an electric signal monitoring module, a timing module and a data management module, and is configured in a photovoltaic panel of a photovoltaic highway and used for measuring the running speed of the vehicle in real time;
the early warning reminding module is used for judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding;
the positioning module is used for acquiring the position information of the vehicle and judging whether the current road is an expressway, and if so, sending a starting instruction to the road information acquisition module;
and the common speed limit adjusting module is used for obtaining the speed limit value of the vehicle according to the prestored electronic map information and returning the speed limit value to the speed measuring module when the positioning module determines that the current road is not the expressway.
Preferably, the lane determining module is specifically configured to detect lane lines according to the image and a preset lane line detection algorithm, determine a number n1 of lane lines on the left side of the vehicle and a number n2 of lane lines on the right side of the vehicle, and calculate to obtain a number n of lanes, which is n1+ n2-1, so that a current lane m of the vehicle is n1 counted from the left side of the vehicle in the driving direction of the vehicle, where, when determining the number of lane lines, emergency lanes are not counted up due to a difference between widths of the emergency lanes and the driving lane.
Preferably, the preset lane line detection algorithm is a model matching method or a feature detection method.
Preferably, the data management module includes a data receiving unit, a data processing unit, a data storage unit and a data sending unit.
Preferably, the data processing unit is configured to determine the driving speed of the vehicle based on the duration of the change of the electrical signal on the photovoltaic panel and the size of the photovoltaic panel.
Preferably, the electric signal monitoring module is used for monitoring voltage, current, power or electric quantity on the photovoltaic panel.
Specifically, when a vehicle passes through a photovoltaic panel, an electric signal monitoring module arranged in the photovoltaic panel monitors the change of an electric signal, the electric signal is gradually reduced from a stable value to a minimum value and then gradually increased from the minimum value to the stable value, a timing module monitors the time for the electric signal to be gradually reduced from the stable value to the minimum value, the time for the electric signal to be kept at the minimum value and the time for the electric signal to be increased from the minimum value to the stable value, wherein the time for the electric signal to be gradually reduced from the stable value to the minimum value is equal to the time for the electric signal to be gradually increased from the minimum value to the stable value, the size of the photovoltaic panel is pre-stored in the data management module, and the data management module calculates the running speed of the vehicle according to the change duration.
Specifically, the speed measuring module is arranged in each photovoltaic panel on the photovoltaic highway, and the speed measuring module is directly powered by the storage battery of the photovoltaic highway.
Specifically, the vehicle monitoring module monitors changes of electric signals on a plurality of photovoltaic panels, and the data management module performs comparative analysis to obtain fault conditions of the photovoltaic panels through changes of the electric signals on one photovoltaic panel and changes of the electric signals on other photovoltaic panels adjacent to the photovoltaic panel.
Specifically, the change of the electrical signal monitored by the electrical signal monitoring module can be represented by the change of the output power of each photovoltaic panel, and the duration corresponding to the change of the output power is monitored by the timing module; setting the rated power of a single photovoltaic panel as W, the conversion efficiency as eta, the distance between two opposite ends of the single photovoltaic panel as L, when no vehicle runs through the single photovoltaic panel, the output power W1 of the single photovoltaic panel as W eta, when a vehicle runs through the single photovoltaic panel, the front part of the vehicle passes through the starting end of the single photovoltaic panel, the output power W1 starts to gradually decrease until the front part of the vehicle reaches the tail end of the single photovoltaic panel, the output power drops to the lowest point W2, the time for the output power to drop from W1 to W2 is T1, and then the output power is kept at W2 until the tail part of the vehicle runs away from the starting end of the single photovoltaic panel, the time for the output power to keep at W2 is T2, the time for the output power to gradually increase until W1, and the tail part of the vehicle runs away from the tail end of the single photovoltaic panel, the time for the output power to rise from W2 to W1 is T1; and the data monitored by the electric signal monitoring module and the timing module are sent to the data management module.
Compared with the prior art, the invention has the beneficial effects that: 1) according to the invention, the electric signal change on the single photovoltaic panel is monitored to monitor that a vehicle runs through the single photovoltaic panel, the running speed of the vehicle is obtained by monitoring the duration time of the electric signal change and combining the size calculation of the photovoltaic panel, no additional hardware monitoring equipment is needed, the vehicle speed monitoring cost is reduced, the running speed of the passing vehicle can be accurately monitored, and the concealment and the effectiveness of vehicle monitoring are improved; 2) on a high-speed photovoltaic road, the number of lanes and the current lane of the vehicle are obtained by analyzing the image of the road in front of the vehicle, the speed limit value can be dynamically adjusted according to the current lane of the vehicle, accurate speed limit information can be obtained, and the vehicle with the speed not within the safety range can be effectively reminded.
Drawings
FIG. 1 is a flow chart of a vehicle overspeed reminding method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a vehicle overspeed reminding method according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a vehicle overspeed reminder system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a vehicle overspeed reminder system according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a velocity measurement module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
The invention provides a vehicle overspeed reminding method and system.
Referring to fig. 1, on a high-speed photovoltaic road, the vehicle overspeed reminding method includes a high-speed limit obtaining step S1;
the high speed limit obtaining step S1 includes:
step S110, an image of a road ahead of the vehicle is acquired.
The method includes the steps that a camera is used for shooting images of a road in front of a vehicle, the camera can be a camera which is independently installed on a windshield and faces the road in front of the vehicle, and can also be a vehicle data recorder, when the vehicle starts to run, the camera or the vehicle data recorder is automatically started or manually started to start to operate, and the images of the road in front of the vehicle are shot, and certainly, the method is not limited to the modes.
And step S120, obtaining the number of lanes and the lane where the vehicle is located according to the image.
And step S121, acquiring vehicle type information of the vehicle.
The vehicle type information can be obtained automatically through a network by manually inputting the vehicle type of the vehicle, for example, the vehicle type of the input vehicle is Audi A6L, and the obtained vehicle type is a small vehicle; or the vehicle type information is automatically recorded in a vehicle system when the vehicle leaves a factory, and the vehicle type information of the vehicle can be obtained from the vehicle system; or utilize radio frequency identification technology, acquire the motorcycle type information through the radio frequency card of installing in the car and the read write line of setting under the road surface, the radio frequency card is stored with the identity information of car owner and the motorcycle type information of vehicle, all is equipped with a read write line in every photovoltaic board, realize communication connection through the microwave 5.8GHz frequency channel between read write line and the radio frequency card, communication distance can reach 8 ~ 30 meters, certainly, also is not limited to these several kinds of modes. The types of vehicles are generally classified into small-sized vehicles and large-sized and medium-sized vehicles.
And step S130, obtaining the speed limit value of the vehicle according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the prestored expressway information table.
The expressway is generally divided into a bidirectional 4-lane expressway, a bidirectional 6-lane expressway and a bidirectional 8-lane expressway, and for the bidirectional 4-lane expressway, the speed limit values of different vehicle types in the same lane are different, so in order to obtain a more accurate speed limit value, the type of a vehicle needs to be recorded, and an accurate speed limit value can be obtained according to the vehicle type of the vehicle and the current lane. Table 1 is an expressway information table, and the prestored expressway information table includes the number of lanes of the expressway, the types of vehicles, and the speed limit value of the specific type of vehicles on the specific lane. The number of lanes of the high-speed photovoltaic highway in the pre-stored expressway information table is in a mapping relation with the number of lanes obtained in the step S120, the type of the vehicle in the pre-stored expressway information table is in a mapping relation with the vehicle type information of the vehicle obtained in the step S121, the specific lane in the pre-stored expressway information table is in a mapping relation with the lane where the vehicle is located obtained in the step S120, and the speed limit value of the vehicle can be obtained from the expressway information table through the mapping relation of the three.
TABLE 1 expressway information Table
For example, when the vehicle runs on a bidirectional 4-lane high-speed photovoltaic highway and the current lane of the vehicle is the 2 nd lane from the left side of the running direction, the speed limit value of the current lane of the vehicle is 120 kilometers per hour when the vehicle is a small vehicle and 100 kilometers per hour when the vehicle is a large or medium vehicle according to the speed limit table of each lane of the highway.
The vehicle overspeed reminding method further comprises the following steps:
step S2, the real-time speed of the vehicle is measured.
Specifically, when a vehicle passes through a photovoltaic panel, the running speed of the vehicle is determined based on the duration of the change of the electrical signal on the photovoltaic panel and the size of the photovoltaic panel. In practical applications, the photovoltaic panel is a crystalline silicon solar panel, the size of which is 2000 × 1000 × 35mm, the rated power is 180W, the conversion efficiency is 80%, the center positions of the two ends of the photovoltaic panel are provided with end points A, B, the distance L from the end point a to the end point B is 2000mm, when no vehicle runs through the photovoltaic panel, the output power W1 × W × η — 180 × 80 — 140W of the photovoltaic panel, when a vehicle runs through the photovoltaic panel, the front part of the vehicle passes through the end point a, the output power W1 starts to gradually decrease until the front part of the vehicle reaches the end point B, the output power drops to the lowest point W2, at this time, the photovoltaic panel is completely shielded by the vehicle, direct irradiation of light cannot be obtained, but indirect irradiation of light can be obtained through reflection, scattering and the like of light irradiated on the adjacent photovoltaic panel, and then lower output power is obtained through conversion, when the time for the output power to decrease from W1 to W2 is 0.12S, the timing module monitors that the time for the output power to decrease from W1 to W2 is 0.12S, and then keeps the output power at W2 until the vehicle tail travels away from the endpoint a, the time for the output power to remain at W2 is 0.18S, the output power starts to gradually increase until W1, and the time for the output power to increase from W2 to W1 is 0.12S, the vehicle traveling speed v is 60KM/h is calculated according to the speed formula v L/t, and the vehicle length S is 5m by the vehicle traveling speed v and the time for the output power to remain at W2.
And step S3, judging whether the real-time speed of the vehicle is greater than the speed limit value, and if so, sending an overspeed prompt.
Step S3 includes step S300, determining whether the real-time speed of the vehicle is greater than the speed limit value, if the real-time speed of the vehicle is greater than the speed limit value, executing step S310, and issuing an overspeed prompt to the driver, wherein the overspeed prompt may be in a voice prompt mode or a text display mode; and if the real-time speed of the vehicle is not greater than the speed limit value, continuing normal running. In the embodiment, on the high-speed photovoltaic road, the number of lanes and the current lane of the vehicle are obtained by analyzing the image of the road in front of the vehicle, the speed limit value can be dynamically adjusted according to the current lane of the vehicle, accurate speed limit information can be obtained, and the vehicle with the speed not within the safety range can be effectively reminded.
Further, the step S120 of obtaining the number of lanes and the lane where the vehicle is located according to the image includes:
detecting lane lines according to the images and a preset lane line detection algorithm, judging the number n1 of the lane lines on the left side of the vehicle and the number n2 of the lane lines on the right side of the vehicle, and calculating to obtain the number n of lanes which is n1+ n2-1, wherein the lane m in which the vehicle is currently located is n1 counted along the left side of the driving direction of the vehicle.
According to the regulations on highway traffic control, the highway has a first lane as a passing lane and second, third and other lanes as traffic lanes on the left side of the driving direction of the motor vehicle. For the bidirectional 6-lane high-speed photovoltaic highway, different speed limits are determined according to lanes. Therefore, the lane where the vehicle is located is determined, and accurate speed limit information can be obtained. For example, on the high-speed photovoltaic highway, according to the image collected in step S110, lane lines are detected, it is determined that the number of lane lines on the left side of the vehicle is 2 and the number of lane lines on the right side of the vehicle is 2, and the number of lanes n is obtained by calculation, that is, the vehicle is on the bidirectional 6-lane high-speed photovoltaic highway, so that the lane m in which the vehicle is currently located is 2 as counted along the left side of the vehicle traveling direction. It should be noted that, when the number of lane lines is determined, the emergency lanes are not counted up because the widths of the emergency lanes and the lane are different.
The preset lane line detection algorithm is a model matching method or a characteristic detection method. The model matching method is a detection method based on a model, and comprises the steps of matching a predefined lane line model according to extracted features, converting lane line extraction into the predefined lane line model for matching, and converting the lane line extraction into the calculation problem of parameters in the lane line model. The model is mainly assumed to be a straight line model and a curve model, and has the advantages of being insensitive to noise and better processing the condition that an object in an image is partially shielded and covered. The feature detection method is a detection method based on image features, all points of an image are marked as lane line points and non-lane line points based on some features (such as lane line color, width, edge and other features) of a road image, and the mechanism requires that the lane line color of a road is obvious and the edge is clear, otherwise, an accurate detection result cannot be obtained.
Example 2
Referring to fig. 2, the invention provides a vehicle overspeed reminding method, which further comprises step S4, obtaining position information of a vehicle, and determining whether a road on which the vehicle is located is a high-speed photovoltaic road; if yes, go to step S1; if not, go to step S5: and acquiring the speed limit value of the vehicle according to the pre-stored electronic map information.
Step S4 is added, the vehicle overspeed reminding method distinguishes the expressway and the non-expressway, the vehicle is known to be on the expressway or the non-expressway by obtaining the position information of the vehicle, if the vehicle is on the non-expressway, the speed limit information of the electronic map at the position is directly called, and the speed limit information is the speed limit value; and if the vehicle is the high-speed photovoltaic road, the step of the embodiment 1 is carried out, and the speed limit value of the vehicle is obtained according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the pre-stored high-speed photovoltaic road information table. The real-time speed of the vehicle is measured after the speed limit value is obtained no matter the vehicle is an expressway or a non-expressway; and judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding.
The difference between the embodiment and the embodiment 1 is that the embodiment further defines the expressway and the non-expressway, and the vehicle overspeed reminding method provided by the invention can be applied to various driving road conditions of vehicles.
Example 3
Referring to fig. 3, the present invention provides a vehicle overspeed reminding system, which includes:
the road information collecting module 110 receives a start instruction and collects an image of a road in front of the vehicle.
The road information collection module 110 acquires an image of a road ahead of the vehicle photographed by the camera in real time. It is understood that the starting instruction can be from various sources, such as automatically sending the starting instruction when the driver starts the vehicle; when the vehicle runs on a high-speed photovoltaic highway, the vehicle overspeed reminding system is started manually, namely, a starting instruction is sent.
And a lane determining module 120, configured to obtain the number of lanes and a lane where the vehicle is located according to the image.
The road image returned by the road information collection module 110 is subjected to lane line detection using a model matching method, a feature detection method, or the like. And (3) counting lane lines n1 and n2 on the left side and the right side of the vehicle, and calculating the number n of lanes to be n1+ n 2-1. The vehicle is currently located in a lane m-n 1, counted from the left side in the driving direction of the vehicle.
And the vehicle information acquisition module 121 is used for acquiring vehicle type information of the vehicle according to the input vehicle model.
And the high-speed limit adjusting module 130 obtains the speed limit value of the vehicle according to the number of the lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relationship in the preset expressway information table.
And the speed measuring module 2 is used for measuring the real-time speed of the vehicle.
Specifically, referring to fig. 5, the speed measuring module 2 includes an electric signal monitoring module 201, a timing module 203 and a data management module 202, and the speed measuring module 2 is configured in a photovoltaic panel of a photovoltaic highway and is used for measuring the running speed of a vehicle in real time. The electrical signal monitoring module 201 monitors the output power variation of the photovoltaic panel. The data management module 202 includes a data receiving unit 2021, a data processing unit 2022, a data storage unit 2023, and a data transmitting unit 2024. The data processing unit 2022 is configured to determine the travel speed of the vehicle based on the duration of the change of the electrical signal on the photovoltaic panel and the size of the photovoltaic panel. The data processing unit 2022 is a processing unit with an embedded chip, such as a single chip, the data storage unit 2023 is a hard disk or a solid-state storage device, and the data receiving unit 2021 and the data sending unit 2024 are wireless communication units.
And the early warning reminding module 3 is used for judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding.
It can be understood that the road information collection module 110 is directly activated when driving on a high-speed photovoltaic road.
According to the vehicle overspeed reminding system provided by the invention, on a high-speed photovoltaic road, the number of lanes and the current lane of the vehicle are obtained by analyzing the image of the road in front of the vehicle, the speed limit value can be dynamically adjusted according to the current lane of the vehicle, accurate speed limit information can be obtained, and the vehicle with the speed not within the safety range can be effectively reminded.
Example 4
Referring to fig. 4, the present invention provides a vehicle overspeed reminding system, which is different from embodiment 3, and further includes:
the positioning module 4 is configured to obtain position information of a vehicle, determine whether a current road is an expressway, and send a start instruction to the road information collection module 110 if the current road is the expressway; if not, sending a common speed limit instruction to the common speed limit adjusting module 5;
and the common speed limit adjusting module 5 is used for receiving the common speed limit instruction and obtaining the speed limit value of the vehicle according to the prestored electronic map information.
The positioning module 4 acquires the position information of the driving vehicle by using a GPS device, and can acquire whether the current road type is an expressway or a non-expressway by matching an electronic map.
When the positioning module 4 positions the vehicle to run on the high-speed photovoltaic road, the start road information collection module 110 and the lane judgment module 120 may judge the lane where the vehicle is located, for example, it is known that the vehicle is located in the 2 nd lane of the bidirectional 4 lanes after the judgment. In cooperation with the vehicle information collection module 121, for example, the user has entered the driving vehicle model to acquire that the vehicle type is a small vehicle. From table 1, it can be known that the speed limit value of the vehicle driven in the current lane is 120 km/h, and the high-speed limit adjusting module 130 is configured to comprehensively determine the information of the lane determining module 120 and the vehicle information collecting module 121, so as to determine the speed limit value.
When the positioning module 4 positions the vehicle to run on the non-high-speed photovoltaic road, the electronic map speed-limiting information is called, the speed-limiting information is the speed-limiting value, and the speed-limiting information is returned to the speed-measuring module.
In summary, the high-speed limit adjusting module 130 or the ordinary speed limit adjusting module 5 can provide an accurate speed limit. The real-time speed of the vehicle obtained by the speed measuring module 2 is compared with the accurate speed limit value provided by the high-speed limit adjusting module 130 or the common speed limit adjusting module 5, so that whether the vehicle is overspeed or not can be known. The difference between the embodiment and the embodiment 3 is that the embodiment further defines the expressway and the non-expressway, and the vehicle overspeed reminding system provided by the invention can be applied to various driving road conditions of vehicles.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A vehicle overspeed reminding method is applied to a high-speed photovoltaic road, and comprises the following steps:
step 1, collecting an image of a road in front of a vehicle;
step 2, obtaining the number of lanes and the lane where the vehicle is located according to the image;
step 3, obtaining vehicle type information of the vehicle;
step 4, obtaining the speed limit value of the vehicle according to the number of lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the prestored expressway information table;
step 5, acquiring the real-time speed of the vehicle, and further acquiring the real-time speed of the vehicle according to the duration of electric signal change on a single photovoltaic panel and the size analysis of the photovoltaic panel when the vehicle runs through the photovoltaic panel paved on the road surface; when a vehicle passes through a photovoltaic panel, an electric signal monitoring module arranged in the photovoltaic panel monitors the change of an electric signal, the electric signal is subjected to gradual reduction from a stable value to a minimum value and then gradually increased from the minimum value to the stable value, a timing module monitors the time for the electric signal to gradually reduce from the stable value to the minimum value, the time for the electric signal to keep at the minimum value and the time for the electric signal to increase from the minimum value to the stable value, wherein the time for the electric signal to gradually reduce from the stable value to the minimum value is equal to the time for the electric signal to gradually increase from the minimum value to the stable value, the size of the photovoltaic panel is pre-stored in a data management module, and the data management module calculates the running speed of the vehicle according to the change duration;
step 6, judging whether the real-time speed of the vehicle is greater than the speed limit value, and if so, sending out overspeed reminding;
further comprising the steps of:
acquiring position information of a vehicle, and judging whether a road where the vehicle is located is a high-speed photovoltaic road; if yes, executing the step of acquiring the image of the road in front of the vehicle; if not, acquiring a speed limit value of the vehicle according to prestored electronic map information, acquiring the real-time speed of the vehicle running through the photovoltaic panel by monitoring the electric signal change of the photovoltaic panel, judging whether the real-time speed of the vehicle is greater than the speed limit value, and if so, sending overspeed reminding.
2. The vehicle overspeed reminding method according to claim 1, wherein the step 2 further comprises the steps of:
detecting lane lines according to the images and a preset lane line detection algorithm, judging the number n1 of the lane lines on the left side of the vehicle and the number n2 of the lane lines on the right side of the vehicle, and calculating to obtain the number n of lanes which is n1+ n2-1, so that the current lane m of the vehicle is n1 counted from the left side of the driving direction of the vehicle, wherein when the number of the lane lines is judged, the emergency lane is not counted up due to the fact that the width of the emergency lane is different from the width of the driving lane.
3. The method according to claim 2, wherein the preset lane line detection algorithm is a model matching method or a feature detection method.
4. A vehicle overspeed reminding system is applied to a high-speed photovoltaic road, and comprises:
the road information acquisition module receives the starting instruction and acquires an image of a road in front of the vehicle;
the lane judging module is used for obtaining the number of lanes and the lane where the vehicle is located according to the image;
the vehicle information acquisition module is used for acquiring the model information of the vehicle according to the input vehicle model;
the high-speed limit adjusting module is used for obtaining the speed limit value of the vehicle according to the number of the lanes, the lanes where the vehicle is located, the vehicle type information of the vehicle and the mapping relation in the preset expressway information table;
the speed measuring module is used for measuring the real-time speed of the vehicle and comprises an electric signal monitoring module, a timing module and a data management module; the speed measuring module is arranged in a photovoltaic panel of the photovoltaic road, and the running speed of the vehicle is calculated according to the change duration of the electric signal and the size of the photovoltaic panel;
the early warning reminding module is used for judging whether the real-time speed of the vehicle is greater than the speed limit value or not, and if so, sending out overspeed reminding;
the positioning module is used for acquiring the position information of the vehicle and judging whether the current road is an expressway, and if so, sending a starting instruction to the road information acquisition module;
and the common speed limit adjusting module is used for obtaining the speed limit value of the vehicle according to the prestored electronic map information and returning the speed limit value to the speed measuring module when the positioning module determines that the current road is not the expressway.
5. The system of claim 4, wherein the lane determining module is specifically configured to detect lane lines according to the image and a preset lane line detection algorithm, determine the number n1 of lane lines on the left side of the vehicle and the number n2 of lane lines on the right side of the vehicle, and calculate to obtain the number n1+ n2-1 of lanes, so that the vehicle is currently located in the lane m n1 counted from the left side of the vehicle in the driving direction of the vehicle, wherein when the number of lane lines is determined, emergency lanes are not counted up due to the difference between the widths of the emergency lanes and the widths of the driving lanes.
6. The system of claim 5, wherein the predetermined lane marking detection algorithm is a model matching method or a feature detection method.
7. The system of claim 4, wherein the data management module comprises a data receiving unit, a data processing unit, a data storage unit and a data sending unit.
8. The vehicle overspeed reminding system of claim 4, wherein said electric signal monitoring module is used for monitoring voltage, current, power or electric quantity on the photovoltaic panel.
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| CN109326133A (en) * | 2018-11-01 | 2019-02-12 | 桂林电子科技大学 | Highway safety supervision method and system, vehicle terminal |
| CN110400481A (en) * | 2019-08-29 | 2019-11-01 | 深圳成谷科技有限公司 | A kind of highway automatic Pilot lane grade management-control method and device |
| CN110595499A (en) * | 2019-09-26 | 2019-12-20 | 北京四维图新科技股份有限公司 | Lane change reminder method, device and system |
| CN112735187A (en) * | 2021-01-29 | 2021-04-30 | 重庆长安汽车股份有限公司 | System and method for automatically identifying emergency lane |
| CN113744538B (en) * | 2021-08-03 | 2022-10-25 | 湖南省交通科学研究院有限公司 | Expressway dynamic supercharging method, computer equipment and readable storage medium |
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| CN113870580B (en) * | 2021-09-01 | 2022-09-20 | 北京中交兴路信息科技有限公司 | Overspeed detection method and device for truck, truck vehicle and truck system |
| CN113781798B (en) * | 2021-11-11 | 2022-07-26 | 四川九通智路科技有限公司 | Polarized light-based vehicle management and control method and system |
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