CN111815984A

CN111815984A - Vehicle height limit early warning method and system based on Internet of things and vehicle

Info

Publication number: CN111815984A
Application number: CN202010570181.7A
Authority: CN
Inventors: 王亚鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-21
Filing date: 2020-06-21
Publication date: 2020-10-23

Abstract

The invention provides a vehicle height limit early warning method based on the Internet of things, wherein the vehicle driving height limit early warning method collects height limit information of a first vehicle provided with a height limit detection device, and an Internet of things server sends the height limit information of a corresponding road section to a second vehicle according to the vehicle information of the second vehicle, so that the height limit information is provided for the second vehicle passing through the same road section, and the second vehicle carries out driving height limit early warning according to the height limit information; therefore, a second vehicle is not required to be provided with the height limiting detection device, and the installation quantity of the height limiting detection device is reduced. In addition, the height limit detection device is arranged right above the vehicle, so that the detection precision is greatly improved; and the acquisition of the height limit information is obtained by detecting and calculating under the passing state of the real height limit road section, so that the problem that the real road condition is not completely consistent with the identification height limit information is solved, the calculation of the height limit information is more real and accurate, the deviation of the measured result and the actual passing road condition is reduced to the maximum extent, and the safe passing efficiency of the vehicle with the height of the vehicle near the height limit height is improved.

Description

Vehicle height limit early warning method and system based on Internet of things and vehicle

Technical Field

The invention relates to the technical field of Internet of things and vehicle height limit early warning, in particular to a vehicle height limit early warning method and system based on the Internet of things and a vehicle.

Background

With the improvement of the scientific and technological and economic levels of China, the types and the number of vehicles are more and more, and some roads are provided with height limiting frames or height limiting rods for protecting the roads and ensuring the personal safety of drivers; the height limiting frame is mainly used for door-shaped frameworks at the entrance of bridges, culverts and tunnels to play a role in protection. Due to the appearance of various vehicle types, road planning is also rapidly updated, the heights of height limiting rods are different, the height limiting rods are used for protecting the safety of passengers and cargos of a driver, but the heights of most height limiting rods are not erected according to standards, the driver bumps the height limiting rods under the conditions that the height of the vehicle is not clear, the vehicle is not driven intensively and the like, the safety of the driver, the passengers and the cargos is threatened, and serious economic loss is caused.

Further, with the development of the car networking technology, the car industry develops more functions beneficial to vehicle driving based on the internet technology, and the road traffic system also provides more data and information reminding for vehicle driving by collecting data of roads and vehicles in real time, such as vehicle speed reminding of vehicles and traffic road condition broadcasting of front roads, while the current car control system does not consider the driving condition of the vehicles and the actual condition of the roads in combination for the driving of the vehicles, especially for the safety height of the vehicle driving, and cannot timely and accurately control the height limit of the vehicles.

In the prior art, document CN110940319A proposes a height limit detection method based on machine vision recognition, which includes the following steps: adjusting the focal length of a camera of the camera mechanism, and calibrating an image coordinate system of the camera; collecting a vehicle image; acquiring height information of the target vehicle according to the longitudinal scale corresponding to the field depth scale mark of the target vehicle in the vehicle image; acquiring a height limiting rod image in front of the running target vehicle; according to the longitudinal scale corresponding to the field depth scale line of the height-limiting rod image where the target height-limiting rod is located in the height-limiting rod image, height information of the target height-limiting rod is obtained; comparing the height information of the target height limiting rod with the height information of the target vehicle; obtaining a height difference; the detection method can realize the detection of the overall height of the vehicle and the height of the height limiting rod, and judges whether the vehicle is ultrahigh or not according to the analysis result by comparing and detecting the heights of the vehicle and the height limiting rod.

On the other hand, document CN110136441A proposes a vehicle height limit control method, which includes: acquiring traffic information of a front road, and acquiring the passable height of the front road according to the traffic information; and acquiring the travelling height of the vehicle, confirming that the travelling vehicle is in a dangerous state according to the passable height and the travelling height, and controlling the vehicle to respond to the dangerous state. Wherein, the accessible height of the road in front is obtained according to the access information, and the method comprises the following steps: acquiring front height limit information of a vehicle running direction and/or acquiring height information of obstacles on a front road; and calculating the passable height of the front road according to the front height limit information and/or the height information of the obstacles. The application improves the response and processing efficiency of the vehicle to the height-limited road section, and ensures the driving safety of the vehicle.

However, the height limit detection devices are installed in each vehicle to perform the height limit early warning for the vehicle, and the vehicle height limit only occurs in a specific few road sections, so the utilization rate of the height limit detection devices is extremely low, and the height limit early warning for all vehicles is performed by installing the height limit detection devices for each vehicle, thereby the economic burden of the vehicle owners is greatly increased, the unnecessary installation of the height limit detection devices causes great waste of resources, and the economic benefit is greatly reduced. In addition, the passable height calculated by the above document is obtained by detecting and calculating the passable height in front of (i.e. on the side of) the vehicle through the detection device in a state that the vehicle does not pass through the real height-limited road section, and the detection method which does not pass through the real height-limited road section is difficult to avoid the influence of adverse factors such as real road conditions (such as uneven road surface damage) and low side detection precision of the detection device, so that the height limitation causes deviation of the detection result and the actual passing road conditions, and the problem that the vehicle with the vehicle height near the height-limited road section cannot pass safely is caused. Therefore, a high-precision height limit detection device which does not need to be installed on all passing vehicles is needed to be provided, so that a method and a device for providing height limit early warning for a large number of vehicle owners are provided, and the utilization rate and the economic benefit of resources are improved.

Disclosure of Invention

The invention provides a vehicle height limit early warning method based on the Internet of things, which comprises the following steps:

s1, automatically detecting whether a height limit mark exists in front of the vehicle by a vehicle event data recorder of the first vehicle, and if so, automatically starting a height limit detection device which is arranged right above the vehicle and used for collecting a first distance from the roof to an upper obstacle in the process of passing through a height limit road section and acquiring height limit information; the limit height information includes: the license plate number of the first vehicle, the position of the height-limited road section, the vehicle passing lane, the actual passable height of the vehicle and the length of the height-limited road section; the actual passable height is the sum of the minimum value of the first distance and the height value of the first vehicle;

s2, after the first vehicle passes through the height-limiting road section, the height-limiting detection device sends the height-limiting information to an Internet of things server;

s3, automatically detecting whether a height limit mark exists in front of the vehicle by an automobile data recorder of the second vehicle, if so, judging whether to send a height limit early warning request according to the height limit mark and the height of the second vehicle, and if so, acquiring license plate number information of a front vehicle by the automobile data recorder and sending the license plate number information to the Internet of things server;

and S4, the Internet of things server sends the height limit information of the corresponding road section to the second vehicle according to the license plate number information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information.

As a preferred embodiment, the steps S3 and S4 further include:

if the automobile data recorder of the second vehicle cannot collect license plate number information of the front vehicle, collecting current position information of the second vehicle, and sending the position information to the Internet of things server;

and the Internet of things server sends the height limit information of the corresponding position to the second vehicle according to the position information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information.

As a preferred embodiment, the steps S3 and S4 further include:

if the automobile data recorder collects a plurality of automobiles in front, acquiring license plate number information of each automobile respectively, and sending the license plate number information to the Internet of things server;

the internet of things server acquires the corresponding height limiting information according to each license plate number information, sends the height limiting information with the largest practical passable height in all the height limiting information to the second vehicle, and the second vehicle performs vehicle height limiting early warning according to the height limiting information and the second vehicle height information.

As a preferred embodiment, the step S1 or S3 further includes:

the automobile data recorder of the vehicle automatically detects whether a height limit mark is arranged in front of the vehicle, if so, the automobile data recorder automatically identifies whether a height limit detection device is arranged on the vehicle, and if the height limit detection device is arranged, the height limit detection device is automatically started;

and if the vehicle is not provided with a height limit detection device, judging whether to send a height limit early warning request or not according to the height limit identification and the height of the vehicle.

As a preferred embodiment, the method for determining whether to send a height-limiting early warning request according to the height-limiting identifier and the height of the vehicle further includes:

acquiring height information in the height limit identification, calculating a difference value between the height in the height limit identification and the vehicle height, and if the difference value is greater than or equal to a first height difference threshold value, not sending the height limit early warning request to prompt the vehicle to have high-limit traffic safety;

and if the difference value is smaller than a first height difference threshold value, sending a height-limiting early warning request.

As a preferred embodiment, the method further comprises:

acquiring height information in the height limit identification, and acquiring a height limit vehicle type according to the height information; identifying the vehicle type of the vehicle, if the vehicle type of the vehicle does not belong to the height-limited vehicle type, not sending the height-limited early warning request, and prompting the vehicle for the passing safety of the height-limited vehicle;

and if the vehicle type of the vehicle belongs to the height-limited vehicle type, sending a height-limited early warning request.

As a preferred embodiment, the step S4 further includes:

the Internet of things server acquires all height limiting information acquired by the height limiting detection device, if a plurality of vehicle passing lanes exist in the same height limiting road section, the height limiting information is classified according to the lanes according to the vehicle passing lanes in the height limiting information, and the minimum value or the average value of all actual passable heights corresponding to each lane is used as the optimal passable height of the lane;

the Internet of things server sends the optimal passable height of each lane to the second vehicle;

the second vehicle identifies a current passing lane, and if the difference value between the optimal passable height of the current passing lane and the second vehicle height is greater than or equal to a second height difference threshold value, the height-limited passing safety of the current lane of the second vehicle is prompted;

if the difference value between the optimal passable height of the current passable lane and the second vehicle height is smaller than the second height difference threshold value and larger than the third height difference threshold value, obtaining the lane with the maximum height in all the optimal passable heights, and if the lane with the maximum height is not the current lane, prompting the second vehicle to change to the lane with the maximum height to safely pass through the height-limited road section;

and if the difference value between the optimal passable height of the current passing lane and the second vehicle height is smaller than a third height difference threshold value, prompting the second vehicle to pass danger on the current height-limited road section.

As a preferred embodiment, the method takes the minimum value or the average value of all the actual passable heights corresponding to each lane as the optimal passable height of the lane, and further includes:

the navigation software of the second vehicle identifies whether the plurality of vehicle traffic lanes of the elevation limit section are tidal lanes; if so, judging whether the current passing direction of the second vehicle is consistent with the current passable direction of the tidal lane, and if so, taking the minimum value or the average value of all the actual passable heights uploaded by the vehicles in the current passable direction as the optimal passable height of the lane;

if not, prompting the second vehicle to avoid the tidal lane.

The invention provides a vehicle height limit early warning method based on the Internet of things, wherein the vehicle driving height limit early warning method collects height limit information of a first vehicle provided with a height limit detection device and sends the height limit information to an Internet of things server, the Internet of things server sends the height limit information of a corresponding road section to a second vehicle according to vehicle information of the second vehicle, so that the height limit information is provided for the second vehicle passing through the same road section, and the second vehicle carries out driving height limit early warning according to the height limit information; therefore, a second vehicle is not required to be provided with the height limit detection device, the installation quantity of the height limit detection device is reduced, and the utilization rate and the economic benefit of resources are improved. In addition, the height limit detection device is arranged right above the vehicle, so that the detection precision is greatly improved; and the vehicles passing through the height-limiting road section are collected, and the collection of the height-limiting information is obtained by detecting and calculating under the passing state of the real height-limiting road section, so that the problem that the real road condition is not completely consistent with the identification height-limiting information is solved, the calculation of the height-limiting information is more real and accurate, the deviation of the measured result and the actual passing road condition is reduced to the maximum extent, and the safe passing efficiency of the vehicles with the height close to the height-limiting height is improved.

As another embodiment, the invention provides a vehicle height limit early warning system based on the internet of things, which comprises the following modules:

the height limit detection module is used for automatically detecting whether a height limit mark exists in front of a vehicle by a vehicle event data recorder of a first vehicle, and if so, automatically starting a height limit detection device which is arranged right above the vehicle and used for collecting a first distance from a vehicle roof to an upper obstacle in the process of passing through a height limit road section and acquiring height limit information; the limit height information includes: the license plate number of the first vehicle, the position of the height-limited road section, the vehicle passing lane, the actual passable height of the vehicle and the length of the height-limited road section; the actual passable height is the sum of the minimum value of the first distance and the height value of the first vehicle;

the height limiting information sending module is used for sending the height limiting information to the Internet of things server by the height limiting detection device after the first vehicle passes through the height limiting road section;

the height-limiting early warning request module is used for automatically detecting whether a height-limiting mark exists in front of a vehicle by a vehicle event data recorder of a second vehicle, judging whether to send a height-limiting early warning request according to the height-limiting mark and the height of the second vehicle if the height-limiting early warning request exists, and acquiring license plate number information of a front vehicle by the vehicle event data recorder and sending the license plate number information to the Internet of things server if the height-limiting early warning request exists;

and the height limit early warning module is used for sending the height limit information of the corresponding road section to the second vehicle by the Internet of things server according to the license plate number information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information.

As a preferred embodiment, the height-limiting early warning request module and the height-limiting early warning module further include:

As a preferred embodiment, the height-limiting early warning request module or the height-limiting detection module further includes:

As a preferred embodiment, the method further comprises:

As a preferred embodiment, the height-limiting early warning module further includes:

if not, prompting the second vehicle to avoid the tidal lane.

The invention provides a vehicle height-limiting early warning system based on the Internet of things, wherein the vehicle driving height-limiting early warning system acquires height-limiting information of a first vehicle provided with a height-limiting detection device and sends the height-limiting information to an Internet of things server, the Internet of things server sends the height-limiting information of a corresponding road section to a second vehicle according to the vehicle information of the second vehicle, so that the height-limiting information is provided for the second vehicle passing through the same road section, and the second vehicle carries out driving height-limiting early warning according to the height-limiting information; therefore, a second vehicle is not required to be provided with the height limit detection device, the installation quantity of the height limit detection device is reduced, and the utilization rate and the economic benefit of resources are improved. In addition, the height limit detection device is arranged right above the vehicle, so that the detection precision is greatly improved; and the vehicles passing through the height-limiting road section are collected, and the collection of the height-limiting information is obtained by detecting and calculating under the passing state of the real height-limiting road section, so that the problem that the real road condition is not completely consistent with the identification height-limiting information is solved, the calculation of the height-limiting information is more real and accurate, the deviation of the measured result and the actual passing road condition is reduced to the maximum extent, and the safe passing efficiency of the vehicles with the height close to the height-limiting height is improved.

As another embodiment, the invention provides a vehicle adopting the vehicle height limit early warning method based on the internet of things, wherein the first vehicle is provided with a height limit detection device, and the second vehicle is not provided with a height limit detection device.

The invention provides a vehicle height limit early warning method, a vehicle height limit early warning system and a vehicle based on the Internet of things, wherein the vehicle driving height limit early warning method is used for acquiring height limit information of a first vehicle provided with a height limit detection device and sending the height limit information to an Internet of things server, the Internet of things server sends the height limit information of a corresponding road section to a second vehicle according to the vehicle information of the second vehicle, so that the height limit information is provided for the second vehicle passing through the same road section, and the second vehicle carries out driving height limit early warning according to the height limit information; therefore, a second vehicle is not required to be provided with the height limit detection device, the installation quantity of the height limit detection device is reduced, and the utilization rate and the economic benefit of resources are improved. In addition, the height limit detection device is arranged right above the vehicle, so that the detection precision is greatly improved; and the vehicles passing through the height-limiting road section are collected, and the collection of the height-limiting information is obtained by detecting and calculating under the passing state of the real height-limiting road section, so that the problem that the real road condition is not completely consistent with the identification height-limiting information is solved, the calculation of the height-limiting information is more real and accurate, the deviation of the measured result and the actual passing road condition is reduced to the maximum extent, and the safe passing efficiency of the vehicles with the height close to the height-limiting height is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the embodiments and the drawings used in the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic step diagram of a vehicle height limiting early warning method based on the internet of things.

Fig. 2 is a schematic structural diagram of an embodiment of a vehicle height-limiting early warning system based on the internet of things.

Detailed Description

The embodiments of the present invention are further described below with reference to the drawings.

The first embodiment is as follows:

as shown in fig. 1, the invention provides a vehicle height limit early warning method based on the internet of things, which comprises the following steps:

s1, automatically detecting whether a height limit mark exists in front of the vehicle by a vehicle event data recorder of the first vehicle, and if so, automatically starting a height limit detection device which is arranged right above the vehicle and used for collecting a first distance from the roof to an upper obstacle in the process of passing through a height limit road section and acquiring height limit information; the limit height information includes: the license plate number of the first vehicle, the position of the height-limited road section, the vehicle passing lane, the actual passable height of the vehicle and the length of the height-limited road section; the actual passable height is the sum of the minimum value of the first distance and the height value of the first vehicle; it should be noted that, the vehicle event data recorder of the first vehicle automatically detects whether there is a height-limiting sign in front of the vehicle, specifically, the video image information in front of the current road section is acquired by the camera device of the vehicle event data recorder, and the vehicle height-limiting sign and the height-limiting sign information thereof in the video image information are identified. It should be emphasized that, in the present invention, the height limit detection device is installed directly above the vehicle, rather than being installed in front of the vehicle as in the prior art, because the detection height information is detected and calculated laterally when installed in front, which causes a problem of low detection precision, whereas the height limit detection device is installed directly above the vehicle, and is directly opposite to an obstacle such as an overhead rack, a bridge, etc. when detecting the height information, which results in higher detection precision and accuracy. Further, in the prior art, the height-limiting detection device is installed in front of the vehicle, so that the vehicle can be judged to safely pass through according to the detection result, and due to the problem of low precision of the detection mode, a misjudgment result that the vehicle can actually pass through the height-limiting road section and be identified as not being able to safely pass through, which causes the vehicle owner to turn around to drive, or the vehicle can not actually pass through the height-limiting road section and be identified as being able to safely pass through, which causes the vehicle owner to forcibly pass through, which causes the loss of vehicle scratch and the like. The actual passing height limit detection device of the first vehicle is used for actually measuring the actual height limit height of the height limit road section, but not the identification height of the height limit signboard and the height limit height predicted by the height limit detection device in the prior art, so that the height limit detection method is more real and objective, thereby providing real and reliable height limit information for the vehicles passing the height limit road section subsequently, and ensuring the passing safety of other vehicles. Meanwhile, the acquired height limit information of the subsequent passing vehicles is completely objective and accurate, so that the subsequent passing vehicles do not need a safety height limit detection device, and the installation cost of vehicle owners is saved. Therefore, the height limit detection method is particularly suitable for the traffic scene of the vehicle with the height close to the height limit. The first vehicle of the present invention may be a vehicle mounted with the height limit detection device of the present invention, and is not limited to a vehicle having a vehicle height close to the height limit height. Illustratively, the limit information includes: the automobile with the license plate number XXX safely passes through a second straight lane of a bb road section, the actual passable height of the lane is 3.12m, and the length of the height-limited road section is 8 m; the height value of the first vehicle is 3.02m, and the minimum value of a first distance from the roof to an obstacle above the roof in the process of passing through the height-limited road section, which is acquired by the height-limited detection device, is 0.1 m; the actual passable height of the second straight lane of the bb section is the sum of the minimum value of the first distance and the height value of the first vehicle, i.e. the actual passable height of this lane is 3.12 m.

S2, after the first vehicle passes through the height-limiting road section, the height-limiting detection device sends the height-limiting information to an Internet of things server; it should be noted that the license plate number of the first vehicle may be used as a part of the height limit information, or may be used alone as additional information of the height limit information, so as to send the additional information to the internet of things server. For example, an automobile with the license plate number XXX safely passes through a second straight lane of a bb road section, the actual passable height of the lane is 3.12m, and height limit information of the height limit road section with the length of 8m is sent to the server of the internet of things.

S3, automatically detecting whether a height limit mark exists in front of the vehicle by an automobile data recorder of the second vehicle, if so, judging whether to send a height limit early warning request according to the height limit mark and the height of the second vehicle, and if so, acquiring license plate number information of a front vehicle by the automobile data recorder and sending the license plate number information to the Internet of things server; it should be noted that, specifically, the automobile data recorder of the second vehicle automatically detects whether the height-limited sign is in front of the vehicle, and acquires video image information in front of the current road section through the camera device of the automobile data recorder, and identifies the vehicle height-limited signboard and the height-limited height information in the video image information. It should be emphasized that the second vehicle of the present invention is all vehicles without the height limit detection device of the present invention, i.e. vehicles passing subsequently do not need the safety height limit detection device, thereby saving the installation cost of the vehicle owner. For example, the automobile data recorder of the second vehicle automatically detects whether a height limit mark exists in front of the vehicle, if so, whether a height limit early warning request is sent is judged according to the height limit mark (for example, the height limit is 3 m) and the height of the second vehicle (for example, the height of the second vehicle is 2.9 m), namely, the height of the second vehicle is closer to the height of the height limit mark, if so, the license plate number information of the front vehicle is collected through the automobile data recorder, and the license plate number information is sent to the internet of things server. The second vehicle acquires license plate number information of a front vehicle through a vehicle data recorder and sends the license plate number information to the Internet of things server; at the moment, similar to the situation that the second vehicle runs with the vehicle behind the first vehicle at a low speed, because the second vehicle is not provided with the height limit detection device, when the vehicle is about to pass through the height limit road section, even though the vehicle owner can see that the front vehicle, namely the first vehicle, passes through the height limit road section, the accurate height limit information of the front vehicle cannot be accurately identified by visual inspection, so that the situation that the vehicle can safely pass through the height limit road section cannot be judged; and because the front vehicle is provided with the height limit detection device, the front vehicle can accurately identify the height limit information of the front vehicle, so that accurate height limit information is provided for the vehicles following the front vehicle, the rear vehicle can analyze and judge the height limit safety, and the utilization efficiency of the height limit information is improved. In general, because the rear vehicle and the front vehicle cannot quickly establish temporary and direct communication connection, the height-limited information storage platform and the transmission channel of the rear vehicle and the front vehicle are established by means of the internet of things server, so that the receiving and sending efficiency of the height-limited information is improved.

And S4, the Internet of things server sends the height limit information of the corresponding road section to the second vehicle according to the license plate number information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information. It should be noted that, in order to accurately match which height-limiting information is useful for the following vehicle, license plate information needs to be added to the height-limiting information, that is, the height-limiting information is identified by the license plate information of the preceding vehicle, so that the following vehicle can accurately acquire the required height-limiting information based on the license plate information after acquiring the license plate information of the preceding vehicle, which is also a most direct height-limiting information acquisition method. In addition, the required height limit information can be provided for the second vehicle, namely the following vehicle, through the information such as the position of the height limit road section, and the like, which is not described herein any more.

Therefore, the vehicle driving height limit early warning method collects the height limit information of a first vehicle provided with a height limit detection device and sends the height limit information to the Internet of things server, the Internet of things server sends the height limit information of a corresponding road section to a second vehicle according to the vehicle information of the second vehicle, so that the height limit information is provided for the second vehicle passing through the same road section, and the second vehicle carries out driving height limit early warning according to the height limit information; therefore, a second vehicle is not required to be provided with the height limit detection device, the installation quantity of the height limit detection device is reduced, and the utilization rate and the economic benefit of resources are improved. In addition, the height limit detection device is arranged right above the vehicle, so that the detection precision is greatly improved; and the vehicles passing through the height-limiting road section are collected, and the collection of the height-limiting information is obtained by detecting and calculating under the passing state of the real height-limiting road section, so that the problem that the real road condition is not completely consistent with the identification height-limiting information is solved, the calculation of the height-limiting information is more real and accurate, the deviation of the measured result and the actual passing road condition is reduced to the maximum extent, and the safe passing efficiency of the vehicles with the height close to the height-limiting height is improved.

As a preferred embodiment, the steps S3 and S4 further include:

if the automobile data recorder of the second vehicle cannot collect license plate number information of the front vehicle, collecting current position information of the second vehicle, and sending the position information to the Internet of things server; it should be noted that, in an actual situation, there may be a situation that the light of the second vehicle is dark when the following vehicle runs to the height-limited road section, and at this time, there may be a situation that the vehicle data recorder of the second vehicle cannot collect the license plate number information of the preceding vehicle, and at this time, the invention adopts another implementation way to accurately obtain the height-limited information of the preceding vehicle or the vehicle that has just passed through the road section; for example, the current position information of a second vehicle is collected, and the position information is sent to the internet of things server; thereby acquiring the required height limit information based on the current position information. It is emphasized that the required height limit information is preferentially acquired from the internet of things server through the license plate number, the current position information of the second vehicle is acquired only when the automobile data recorder of the second vehicle cannot acquire the license plate number information of the front vehicle, and the required height limit information is acquired from the internet of things server through the current position information. This is because the height limit information acquired by the license plate number information is acquired by the preceding vehicle that has just passed through the height limit section, and the accuracy thereof is stronger. Moreover, the matching performance of the license plate number information is better, the geographical position information has various expression methods, and the complexity and the accuracy of the matching process of the geographical position are lower, so that the accurate height limit information is not convenient to acquire quickly and in real time.

And the Internet of things server sends the height limit information of the corresponding position to the second vehicle according to the position information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information. It should be noted that the internet of things server sends the corresponding height-limiting information to the second vehicle according to the current position information sent by the second vehicle, where the current position is the position of a height-limiting road section through which the second vehicle is going to pass, and the second vehicle performs driving height-limiting early warning according to the height-limiting information; for example, the height-limited link positions in all the height-limited information are extracted, the current height-limited link position is compared with all the extracted height-limited link positions, the current height-limited link position and the extracted height-limited link position are judged to be the same position when the position information of the current height-limited link position and the position information of the current height-limited link position are consistent or the distance between the current height-limited link position and the extracted height-limited link position is smaller than a set distance threshold, and then the height-limited information including.

As a preferred embodiment, the steps S3 and S4 further include:

if the automobile data recorder collects a plurality of automobiles in front, acquiring license plate number information of each automobile respectively, and sending the license plate number information to the Internet of things server; it should be noted that in an actual situation, when a preceding vehicle queues up to pass through a height-limited road section, a plurality of vehicles change lanes, queue insertion and the like may occur, and at this time, in order to accurately acquire height-limited information, license plate information of each vehicle needs to be acquired respectively, and each license plate information is sent to the internet of things server, so that height-limited information of more lanes is acquired for reference by a second vehicle.

The internet of things server acquires the corresponding height limiting information according to each license plate number information, sends the height limiting information with the largest practical passable height in all the height limiting information to the second vehicle, and the second vehicle performs vehicle height limiting early warning according to the height limiting information and the second vehicle height information. It should be noted that in practice, a situation that a front vehicle is not provided with a height limit detection device exists, and therefore, the acquired license plate number information cannot be matched in an internet of things server; at the moment, the success rate of matching can be improved by collecting license plate number information of a plurality of front vehicles. In addition, the internet of things server acquires all corresponding height-limiting information according to each license plate number information, namely, a situation that the internet of things server stores a plurality of height-limiting information which can be matched occurs at the moment, and in order to guarantee the height-limiting passing safety of a second vehicle to the maximum extent, the height-limiting information with the minimum height in all the height-limiting information is sent to the second vehicle, namely, the height-limiting information with the minimum height is dangerous at the moment, so that the height-limiting passing safety of the second vehicle is guaranteed, and therefore the second vehicle carries out driving height-limiting early warning according to the height-limiting information.

As a preferred embodiment, the step S1 or S3 further includes:

the automobile data recorder of the vehicle automatically detects whether a height limit mark is arranged in front of the vehicle, if so, the automobile data recorder automatically identifies whether a height limit detection device is arranged on the vehicle, and if the height limit detection device is arranged, the height limit detection device is automatically started; it should be noted that the vehicle in this embodiment may be a vehicle with a height limit detection device installed, or may also be a vehicle without a height limit detection device installed, that is, the passing vehicles are random; at the moment, a vehicle event data recorder of the vehicle automatically detects whether a height limit mark is arranged in front of the vehicle, if so, the vehicle event data recorder indicates that the vehicle is about to pass through a height limit road section, then, whether a height limit detection device is arranged on the vehicle is automatically identified, and if the height limit detection device is arranged, the height limit detection device is automatically started to carry out height limit detection; at this time, no matter whether the height of the vehicle is close to the height limit height, that is, whether the driving safety of the vehicle exists or not is not considered, the height limit detection device needs to be started to perform height limit detection, so that accurate height limit information is provided for the passage of other vehicles for reference, and the utilization rate of the height limit detection device is improved.

And if the vehicle is not provided with a height limit detection device, judging whether to send a height limit early warning request or not according to the height limit identification and the height of the vehicle. It should be noted that, if the vehicle is not equipped with a height limit detection device, and there is a safety problem of passing height limit at this time, it is determined whether to send a height limit early warning request according to the height limit identifier and the height of the vehicle, that is, it is determined that the necessity of obtaining height limit information is required.

acquiring height information in the height limit identification, calculating a difference value between the height in the height limit identification and the vehicle height, and if the difference value is greater than or equal to a first height difference threshold value, not sending the height limit early warning request to prompt the vehicle to have high-limit traffic safety; it should be noted that, in this embodiment, the implementation of determining whether the vehicle has the requirement of the height-limited warning is based on the height information. Illustratively, the height information in the height limit marker is obtained to be 3m, for example, the difference between the height 3m in the height limit marker and the vehicle height 2.8m is calculated to be 0.2m, and if the difference 0.2m is greater than or equal to a first height difference threshold value 0.1m, it indicates that the vehicle is in a safe height range and can safely pass without performing height limit early warning, so that the height limit early warning request is not sent, and the vehicle is prompted to pass safely.

And if the difference value is smaller than a first height difference threshold value, sending a height-limiting early warning request. It should be noted that, for example, if the difference value is, for example, 0.05m smaller than the first height difference threshold value of 0.1m, this indicates that the height of the vehicle is not within the safety range and there is a possibility of a traffic hazard, and there is a need to perform the height-limiting early warning, so that the height-limiting early warning request is sent.

As a preferred embodiment, the method further comprises:

acquiring height information in the height limit identification, and acquiring a height limit vehicle type according to the height information; identifying the vehicle type of the vehicle, if the vehicle type of the vehicle does not belong to the height-limited vehicle type, not sending the height-limited early warning request, and prompting the vehicle for the passing safety of the height-limited vehicle; it should be noted that, in this embodiment, the implementation manner of determining whether the vehicle has the height-limiting early warning requirement is the type information of the vehicle, for example, the license plate number information correspondingly records that the vehicle type of the vehicle is a sedan, an SUV, a minivan, a large van, and the like, while different types of vehicles have different height information in a general case, for example, the height of the sedan is generally lower than 1.5m, the height of the SUV is generally lower than 2m, the height of the minivan is generally 2-2.5m, and the height of the large van is greater than 2.8 m; at the moment, whether the vehicle has the height-limited early warning requirement or not can be judged by means of the type information of the vehicle; illustratively, height information such as 2.5m in the height limit mark is acquired, and the types of the height-limited vehicles, namely a small truck and a large truck, are acquired according to the height information 2.5 m; identifying the vehicle type (such as a car) of the vehicle, wherein the vehicle type of the vehicle is the car and does not belong to the height-limited vehicle type, which indicates that the car can safely pass, so that the height-limited early warning request is not sent to prompt the height-limited high-pass safety; and if the vehicle type of the vehicle is a small truck, the vehicle type belongs to the height-limiting vehicle type, and the condition that the vehicle possibly has danger in passing through the height-limiting road section is indicated at the moment, so that a height-limiting early warning request is sent.

As a preferred embodiment, the step S4 further includes:

the Internet of things server acquires all height limiting information acquired by the height limiting detection device, if a plurality of vehicle passing lanes exist in the same height limiting road section, the height limiting information is classified according to the lanes according to the vehicle passing lanes in the height limiting information, and the minimum value or the average value of all actual passable heights corresponding to each lane is used as the optimal passable height of the lane; it should be noted that, there are a plurality of traffic lanes in the height-limited section, and the actual road conditions of each lane are different, so the trafficability of the vehicle is different, for example, the inner lane is usually a fast lane for small vehicles to pass through, and the traffic is light and the traffic is good; the outer lane is usually a slow lane through which large trucks and the like pass, and the road condition is poor due to the fact that the weight of the truck is large; in addition, factors such as convenience in drainage or influence by terrain can cause the inner lane and the outer lane not to be completely on the same horizontal plane, namely the ground plane can have various uncontrollable factors in practical situations. In addition, there may be instances where the top of the elevation limit section is not perfectly level. At this time, various factors simultaneously affect the horizontality of the road surface and the top, so that the actual trafficability of the vehicle is greatly different from the height limit of the sign, and the trafficability of different lanes is different. Therefore, the present invention provides the method of the present invention and the method of the present embodiment with a specific consideration to the practical problem, for example, the height limit information of different lanes is collected by lane division, so as to provide more accurate height limit information in a targeted manner. Specifically, the internet-of-things server obtains height limit information (for example, lane a actual height limit of 3.12m, lane a actual height limit of 3.10m, lane B actual height limit of 3.10m, lane a actual height limit of 3.08m, and lane B actual height limit of 3.02 m) collected by all the height limit detection devices, if there are multiple vehicle passing lanes (namely, lanes a/B) in the same height limit section, the height limit information is classified according to lanes according to the vehicle passing lanes in the height limit information (for example, lane a actual height limit of 3.12m, 3.10m, 3.08m, lane B actual height limit of 3.10m, 3.02 m), and the minimum value or the average value of all the actual passable heights corresponding to each lane is used as the optimal passable height of the lane (for example, the minimum value or the average value of the actual height limit of 3.12m 3.10m, the actual average value of the lane B height limit of 3.06m, the minimum value of the a actual height limit of 3.08m, and the lane B height limit of, Lane B actual minimum height 3.02 m), at this time, the minimum value (e.g. lane a actual minimum height 3.08m, lane B actual minimum height 3.02 m) or the average value (e.g. lane a actual average height 3.10m, lane B actual average height 3.06 m) of all the actual passable heights corresponding to each lane may be used as the optimal passable height of the lane. The minimum value of all the actual passable heights ensures the passing safety of the vehicle with limited height to the maximum extent, and the average value of all the actual passable heights reduces the system error among different measuring devices, thereby ensuring the accuracy of the measured value.

The Internet of things server sends the optimal passable height of each lane to the second vehicle; it should be noted that the transmission method may be any wireless communication method in the prior art, and is not limited herein.

The second vehicle identifies a current passing lane, and if the difference value between the optimal passable height of the current passing lane and the second vehicle height is greater than or equal to a second height difference threshold value, the height-limited passing safety of the current lane of the second vehicle is prompted; it should be noted that, for example, the second vehicle identifies that the current passing lane is lane a, and if the difference between the optimal passable height 3.10m of the current passing lane and the second vehicle height 3.03 m, which is 0.07m, is greater than or equal to the second height difference threshold value, which is 0.05m, it indicates that the second vehicle can pass safely, so that it is suggested that the second vehicle is safe to pass at the current lane height limit.

If the difference value between the optimal passable height of the current passable lane and the second vehicle height is smaller than the second height difference threshold value and larger than the third height difference threshold value, obtaining the lane with the maximum height in all the optimal passable heights, and if the lane with the maximum height is not the current lane, prompting the second vehicle to change to the lane with the maximum height to safely pass through the height-limited road section; it should be noted that, for example, if the difference 0.04m between the optimal passable height 3.10m of the current passable lane a and the second vehicle height 3.06m is smaller than the second height difference threshold 0.05m and larger than the third height difference threshold 0.02m, there is a dangerous possibility of passing in a certain lane, and at this time, the lane with the highest height among all the optimal passable heights is obtained to pass in the lane with the highest height, so as to ensure the driving safety to the maximum extent; at this time, if the lane with the largest height is not the current lane, a second vehicle is prompted to change to the lane with the largest height to safely pass through the height-limited section.

And if the difference value between the optimal passable height of the current passing lane and the second vehicle height is smaller than a third height difference threshold value, prompting the second vehicle to pass danger on the current height-limited road section. For example, the difference 0.01m between the optimal passable height 3.10m of the current passing lane and the height of the second vehicle is smaller than the third height difference threshold value 0.02m, and at this time, the second vehicle is presented with a high possibility of passing through the current passing lane, and then the second vehicle is presented with a passing danger on the current limited-height road section.

the navigation software of the second vehicle identifies whether the plurality of vehicle traffic lanes of the elevation limit section are tidal lanes; if so, judging whether the current passing direction of the second vehicle is consistent with the current passable direction of the tidal lane, and if so, taking the minimum value or the average value of all the actual passable heights uploaded by the vehicles in the current passable direction as the optimal passable height of the lane; it should be noted that, in practice, there is a tidal lane, and at this time, the asymmetric road condition of the tidal lane may cause a situation that the traffic trafficability characteristics are different in different driving directions, and for this reason, it is necessary to determine the height-limiting trafficability characteristic for the different driving directions of the tidal lane. For example, when the current passing direction of a second vehicle is consistent with the current passable direction of the tidal lane, taking the minimum value or the average value of all the actual passable heights uploaded by the vehicles in the current passable direction as the optimal passable height of the lane; and prompting the second vehicle to avoid the tidal lane when the current passing direction of the second vehicle is not consistent with the current passable direction of the tidal lane.

Example two:

as shown in fig. 2, the invention provides a vehicle height-limiting early warning system based on the internet of things, which comprises the following modules:

the height limit detection module is used for automatically detecting whether a height limit mark exists in front of a vehicle by a vehicle event data recorder of a first vehicle, and if so, automatically starting a height limit detection device which is arranged right above the vehicle and used for collecting a first distance from a vehicle roof to an upper obstacle in the process of passing through a height limit road section and acquiring height limit information; the limit height information includes: the license plate number of the first vehicle, the position of the height-limited road section, the vehicle passing lane, the actual passable height of the vehicle and the length of the height-limited road section; the actual passable height is the sum of the minimum value of the first distance and the height value of the first vehicle; it should be noted that, the vehicle event data recorder of the first vehicle automatically detects whether there is a height-limiting sign in front of the vehicle, specifically, the video image information in front of the current road section is acquired by the camera device of the vehicle event data recorder, and the vehicle height-limiting sign and the height-limiting sign information thereof in the video image information are identified. It should be emphasized that, in the present invention, the height limit detection device is installed directly above the vehicle, rather than being installed in front of the vehicle as in the prior art, because the detection height information is detected and calculated laterally when installed in front, which causes a problem of low detection precision, whereas the height limit detection device is installed directly above the vehicle, and is directly opposite to an obstacle such as an overhead rack, a bridge, etc. when detecting the height information, which results in higher detection precision and accuracy. Further, in the prior art, the height-limiting detection device is installed in front of the vehicle, so that the vehicle can be judged to safely pass through according to the detection result, and due to the problem of low precision of the detection mode, a misjudgment result that the vehicle can actually pass through the height-limiting road section and be identified as not being able to safely pass through, which causes the vehicle owner to turn around to drive, or the vehicle can not actually pass through the height-limiting road section and be identified as being able to safely pass through, which causes the vehicle owner to forcibly pass through, which causes the loss of vehicle scratch and the like. The actual passing height limit detection device of the first vehicle is used for actually measuring the actual height limit height of the height limit road section, but not the identification height of the height limit signboard and the height limit height predicted by the height limit detection device in the prior art, so that the height limit detection method is more real and objective, thereby providing real and reliable height limit information for the vehicles passing the height limit road section subsequently, and ensuring the passing safety of other vehicles. Meanwhile, the acquired height limit information of the subsequent passing vehicles is completely objective and accurate, so that the subsequent passing vehicles do not need a safety height limit detection device, and the installation cost of vehicle owners is saved. Therefore, the height limit detection method is particularly suitable for the traffic scene of the vehicle with the height close to the height limit. The first vehicle of the present invention may be a vehicle mounted with the height limit detection device of the present invention, and is not limited to a vehicle having a vehicle height close to the height limit height. Illustratively, the limit information includes: the automobile with the license plate number XXX safely passes through a second straight lane of a bb road section, the actual passable height of the lane is 3.12m, and the length of the height-limited road section is 8 m; the height value of the first vehicle is 3.02m, and the minimum value of a first distance from the roof to an obstacle above the roof in the process of passing through the height-limited road section, which is acquired by the height-limited detection device, is 0.1 m; the actual passable height of the second straight lane of the bb section is the sum of the minimum value of the first distance and the height value of the first vehicle, i.e. the actual passable height of this lane is 3.12 m.

The height limiting information sending module is used for sending the height limiting information to the Internet of things server by the height limiting detection device after the first vehicle passes through the height limiting road section; it should be noted that the license plate number of the first vehicle may be used as a part of the height limit information, or may be used alone as additional information of the height limit information, so as to send the additional information to the internet of things server. For example, an automobile with the license plate number XXX safely passes through a second straight lane of a bb road section, the actual passable height of the lane is 3.12m, and height limit information of the height limit road section with the length of 8m is sent to the server of the internet of things.

The height-limiting early warning request module is used for automatically detecting whether a height-limiting mark exists in front of a vehicle by a vehicle event data recorder of a second vehicle, judging whether to send a height-limiting early warning request according to the height-limiting mark and the height of the second vehicle if the height-limiting early warning request exists, and acquiring license plate number information of a front vehicle by the vehicle event data recorder and sending the license plate number information to the Internet of things server if the height-limiting early warning request exists; it should be noted that, specifically, the automobile data recorder of the second vehicle automatically detects whether the height-limited sign is in front of the vehicle, and acquires video image information in front of the current road section through the camera device of the automobile data recorder, and identifies the vehicle height-limited signboard and the height-limited height information in the video image information. It should be emphasized that the second vehicle of the present invention is all vehicles without the height limit detection device of the present invention, i.e. vehicles passing subsequently do not need the safety height limit detection device, thereby saving the installation cost of the vehicle owner. For example, the automobile data recorder of the second vehicle automatically detects whether a height limit mark exists in front of the vehicle, if so, whether a height limit early warning request is sent is judged according to the height limit mark (for example, the height limit is 3 m) and the height of the second vehicle (for example, the height of the second vehicle is 2.9 m), namely, the height of the second vehicle is closer to the height of the height limit mark, if so, the license plate number information of the front vehicle is collected through the automobile data recorder, and the license plate number information is sent to the internet of things server. The second vehicle acquires license plate number information of a front vehicle through a vehicle data recorder and sends the license plate number information to the Internet of things server; at the moment, similar to the situation that the second vehicle runs with the vehicle behind the first vehicle at a low speed, because the second vehicle is not provided with the height limit detection device, when the vehicle is about to pass through the height limit road section, even though the vehicle owner can see that the front vehicle, namely the first vehicle, passes through the height limit road section, the accurate height limit information of the front vehicle cannot be accurately identified by visual inspection, so that the situation that the vehicle can safely pass through the height limit road section cannot be judged; and because the front vehicle is provided with the height limit detection device, the front vehicle can accurately identify the height limit information of the front vehicle, so that accurate height limit information is provided for the vehicles following the front vehicle, the rear vehicle can analyze and judge the height limit safety, and the utilization efficiency of the height limit information is improved. In general, because the rear vehicle and the front vehicle cannot quickly establish temporary and direct communication connection, the height-limited information storage platform and the transmission channel of the rear vehicle and the front vehicle are established by means of the internet of things server, so that the receiving and sending efficiency of the height-limited information is improved.

And the height limit early warning module is used for sending the height limit information of the corresponding road section to the second vehicle by the Internet of things server according to the license plate number information, and the second vehicle carries out vehicle height limit early warning according to the height limit information and the second vehicle height information. It should be noted that, in order to accurately match which height-limiting information is useful for the following vehicle, license plate information needs to be added to the height-limiting information, that is, the height-limiting information is identified by the license plate information of the preceding vehicle, so that the following vehicle can accurately acquire the required height-limiting information based on the license plate information after acquiring the license plate information of the preceding vehicle, which is also a most direct height-limiting information acquisition method. In addition, the required height limit information can be provided for the second vehicle, namely the following vehicle, through the information such as the position of the height limit road section, and the like, which is not described herein any more.

As a preferred embodiment, the method further comprises:

Example three:

Example four:

as another embodiment, the present invention provides a computer-readable storage medium stored in a memory in an internet of things-based vehicle height limit warning system, where the computer-readable storage medium includes a computer-readable storage medium that executes the internet of things-based vehicle height limit warning method.

Those skilled in the art will appreciate that the present invention includes apparatus directed to performing one or more of the operations described in the present application. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable programmable Read-Only memories), EEPROMs (Electrically Erasable programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the aspects specified in the block or blocks of the block diagrams and/or flowchart illustrations of the invention.

Those of skill in the art will appreciate that various operations, methods, steps in the processes, acts, or solutions discussed in the present application may be alternated, modified, combined, or deleted. Further, various operations, methods, steps in the flows, which have been discussed in the present application, may be interchanged, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the various operations, methods, procedures disclosed in the prior art and the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A vehicle height limiting early warning method based on the Internet of things is characterized by comprising the following steps:

2. The method according to claim 1, wherein the steps S3, S4 further comprise:

3. The method according to claim 1, wherein the steps S3, S4 further comprise:

4. The method according to any one of claims 1-3, wherein the step S1 or S3 further comprises:

5. The method of claim 4, wherein determining whether to send a height-limited warning request according to the height-limited identification and the height of the vehicle further comprises:

6. The method of claim 4, further comprising:

7. The method according to claim 1, wherein the step S4 further comprises:

8. The method according to claim 7, wherein the minimum value or the average value of all practical passable heights corresponding to each lane is used as the optimal passable height of the lane, and the method further comprises the following steps:

if not, prompting the second vehicle to avoid the tidal lane.

9. The utility model provides a vehicle limit for height early warning system based on thing networking which characterized in that, the system includes following module:

10. A vehicle adopting the vehicle height limit early warning method based on the Internet of things of any one of claims 1 to 8,

the first vehicle is equipped with a height limit detection device, and the second vehicle is not equipped with a height limit detection device.