CN114141021A

CN114141021A - Smart city traffic signal lamp control system and control method thereof

Info

Publication number: CN114141021A
Application number: CN202111545417.2A
Authority: CN
Inventors: 肖晓槟; 李铁祥
Original assignee: Shenzhen Greenwave Traffic Technology Co ltd
Current assignee: Shenzhen Greenwave Traffic Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-03-04
Anticipated expiration: 2041-12-16
Also published as: CN114141021B

Abstract

The invention provides a smart city traffic signal lamp control system and a control method thereof, wherein the system comprises: the system comprises an acquisition module and a traffic signal lamp time control module; the method comprises the following steps: collecting vehicle data and monitoring data, and controlling the time change of a traffic signal lamp based on the monitoring data or the vehicle data; the vehicle data comprises the length of a traffic stream waiting for a traffic signal lamp and the driving direction of the vehicle, and the monitoring data comprises the current time and the current traffic intersection brightness; the system can reasonably adjust different signal display time of the traffic signal lamp according to the traffic condition of the current traffic intersection, improves the command efficiency of the traffic signal lamp at the traffic intersection, prevents the traffic intersection from being blocked and improves the urban traffic quality.

Description

Smart city traffic signal lamp control system and control method thereof

Technical Field

The invention relates to the technical field of intelligent traffic, in particular to a smart urban traffic signal lamp control system and a control method thereof.

Background

Along with the increase of urban scale and the rapid increase of urban quantity, urban traffic problems are gradually revealed, the command efficiency of a traffic signal lamp system displayed at fixed time at a traffic intersection is insufficient, the problems of vehicle congestion in rush hours in the morning and at night and long waiting time of passing vehicles when no people are at night often cannot be effectively processed in practical application, and therefore an intelligent urban traffic signal lamp control system and a control method thereof are urgently needed for solving the problems that the command efficiency of the traffic signal lamp system displayed at fixed time at the traffic intersection is insufficient, the problem of vehicle congestion in the rush hours in the morning and at night often cannot be effectively processed in practical application, the problem of long waiting time of passing vehicles when no people are at night and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a smart urban traffic signal lamp control system and a control method thereof, which are used for solving the problems that the traffic signal lamp system with fixed time display has insufficient command efficiency at traffic intersections, the traffic jam problem of urban vehicles in the early and late rush hours often cannot be effectively solved in practical application, the waiting time of vehicles passing at night is long and the like when no one is in the night.

A smart city traffic signal light control system, comprising:

the acquisition module is used for acquiring vehicle data and monitoring data;

the traffic signal lamp time control module is used for controlling the time change of the traffic signal lamp based on the monitoring data or the vehicle data;

the vehicle data comprises the length of a traffic stream waiting for a traffic signal lamp and the driving direction of the vehicle, and the monitoring data comprises the current time and the current traffic intersection brightness.

As an embodiment of the present invention, a smart city traffic signal lamp control system further includes: an energy-saving control module;

the energy-saving control module executes the following operations:

acquiring the brightness of the current traffic intersection; screening a preset traffic intersection brightness-traffic signal lamp brightness corresponding set based on the current traffic intersection brightness to obtain the traffic signal lamp brightness corresponding to the current traffic intersection brightness;

generating a brightness control signal according to the brightness of the traffic signal lamp for controlling the brightness of the traffic signal lamp;

the preset traffic intersection brightness-traffic signal lamp brightness correspondence set comprises a plurality of groups of combinations of traffic intersection brightness and traffic signal lamp brightness, and the traffic intersection brightness and the traffic signal lamp brightness correspond to each other in each group of combinations of the traffic intersection brightness and the traffic signal lamp brightness.

As an embodiment of the present invention, the traffic signal time control module performs operations including:

acquiring current time, and judging whether the current time is within a preset starting time range;

if so, screening a preset current time-total predicted pedestrian number corresponding set based on the current time to obtain the total predicted pedestrian number corresponding to the current time; screening a preset step table of the total predicted pedestrian number and the traffic signal lamp change time based on the total predicted pedestrian number to obtain the traffic signal lamp change time corresponding to the total predicted pedestrian number;

generating a corresponding first time control signal to control the time change of the traffic light according to the change time of the traffic light corresponding to the predicted number of people in the head office;

or the like, or, alternatively,

acquiring the vehicle running directions of all vehicles waiting for traffic signal lamps, and judging whether the traffic flow length of the vehicles waiting for the traffic signal lamps in any vehicle running direction is within a preset traffic flow length range or not;

if the traffic flow length of the waiting traffic signal lamp in any vehicle driving direction is not in the preset traffic flow length range and is larger than the maximum value of the preset traffic flow length range, judging whether the vehicle data has the vehicle driving direction of which the traffic flow length of the waiting traffic signal lamp in other vehicle driving directions is not in the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range;

if the traffic flow length of the waiting traffic signal lamp in any vehicle running direction is not within the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, taking the vehicle running direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle running direction is not within the preset traffic flow length range and is larger than the maximum value of the preset traffic flow length range, as a first running direction; taking the vehicle running direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle running direction is not within the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, as a second running direction;

screening a preset first driving direction-second driving direction-traffic signal lamp change time set based on the first driving direction and the second driving direction to obtain traffic signal lamp change time corresponding to the first driving direction and the second driving direction;

and generating a corresponding second time control signal according to the change time of the traffic signal lamp corresponding to the first driving direction and the second driving direction to control the time change of the traffic signal lamp.

As an embodiment of the present invention, a smart city traffic signal lamp control system further includes: the special vehicle traffic smooth module;

the special vehicle traffic smooth module executes the following operations:

receiving the special vehicle running route and the special vehicle license plate information sent by the background terminal, and judging whether the special vehicle passes through the current traffic intersection or not according to the special vehicle running route;

if so, predicting the shortest driving time required by the special vehicle to drive to the current traffic intersection and starting to count down to obtain the remaining time required by the special vehicle to drive to the current traffic intersection,

and the combination of (a) and (b),

determining the running direction of the special vehicle passing through the current traffic intersection;

acquiring a preset error time length, when the residual time length is less than the preset error time length,

the traffic signal lamp change time corresponding to the running direction of the special vehicle is intensively screened out from the preset running direction of the special vehicle-traffic signal lamp change time according to the running direction of the special vehicle to be used for controlling the time change of the traffic signal lamp,

and the combination of (a) and (b),

and if the compared number plate information is the same as the special vehicle number plate information and the special vehicle passes through the current traffic intersection, controlling the change time of the traffic signal lamp of the current traffic intersection to be adjusted to the change time of the previous traffic signal lamp.

As an embodiment of the present invention, a smart city traffic signal lamp control system further includes: an accident area traffic signal lamp time adjusting module;

the accident area traffic signal lamp time adjusting module executes the following operations:

acquiring a real-time traffic flow image within a preset range of a traffic intersection, and judging whether an accident area exists in the real-time traffic flow image or not;

the accident area judgment method comprises the following steps: if any trafficable direction with a green light as a traffic signal lamp exists in the real-time traffic flow image, and at least one vehicle does not move within the preset moving time exists on a road corresponding to the trafficable direction, judging that an accident area exists in the real-time traffic flow image, and taking the vehicle which is closest to the traffic signal lamp and does not move within the preset moving time as an accident vehicle;

if an accident area exists in the real-time traffic flow image, judging whether accident vehicles in the accident area block the passing of other vehicles in the passable driving direction;

the method for judging the barrier passage comprises the following steps: if the other vehicles behind the accident vehicle at the traffic flow queuing position do not move towards the traffic signal lamp direction within the preset moving time when the traffic signal lamp corresponding to the passable driving direction is green in the real-time traffic flow image, judging that the accident vehicle in the accident area blocks the passage of the other vehicles in the passable driving direction;

if the accident vehicle in the accident area obstructs the passing of other vehicles in the passable traveling direction, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: the green light time of the passable driving direction is reduced, and the green light time of other driving directions of the corresponding traffic intersection is increased;

acquiring the moving state of an accident vehicle in an accident area in real time, acquiring a first waiting traffic flow length in a passable driving direction and acquiring a second waiting traffic flow length in other driving directions of a corresponding traffic intersection if the accident vehicle starts to move;

judging whether any second waiting traffic flow length in the second traffic flow lengths in all other driving directions has the minimum value of which the second waiting traffic flow length is smaller than the preset traffic flow length range, and if so, taking the other driving directions of which the second waiting traffic flow length is smaller than the minimum value of the preset traffic flow length range as the driving direction adjustment;

if the first waiting traffic flow length is larger than the maximum value of the preset traffic flow length range, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: increasing the green light time of the passable driving direction and reducing the green light time of adjusting the driving direction;

and when the first waiting traffic flow length is within the preset traffic flow length range, controlling the change time of the traffic signal lamp of the current traffic intersection to be adjusted to the change time of the traffic signal lamp before the accident area exists.

A smart city traffic signal lamp control method comprises the following steps:

collecting vehicle data and monitoring data;

controlling a time variation of the traffic signal lamp based on the monitoring data or the vehicle data;

the vehicle data comprises the length of a traffic stream waiting for a traffic signal lamp and the driving direction of the vehicle, and the monitoring data comprises the current time and the brightness of the current traffic intersection.

As an embodiment of the present invention, a method for controlling a smart city traffic signal further includes:

As an embodiment of the present invention, controlling the temporal variation of the traffic signal based on the environmental data or the vehicle data includes:

or the like, or, alternatively,

and the combination of (a) and (b),

The invention has the beneficial effects that:

the invention can reasonably adjust the different signal display time of the traffic signal lamp according to the traffic condition of the current traffic intersection, improves the command efficiency of the traffic signal lamp at the traffic intersection, prevents the traffic intersection from being jammed and improves the urban traffic quality.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a system diagram 1 of a smart city traffic signal lamp control system and a control method thereof according to an embodiment of the present invention;

FIG. 2 is a system diagram of a smart city traffic signal lamp control system and a control method thereof according to an embodiment of the present invention 2;

fig. 3 is a schematic diagram of a smart city traffic light control system and a method for controlling the same according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Referring to fig. 1, an embodiment of the present invention provides a smart city traffic light control system, including:

the acquisition module is used for acquiring vehicle data and monitoring data;

a traffic signal light time control module for controlling time variation of a traffic signal light based on the monitoring data or the vehicle data;

the vehicle data comprise the traffic flow length of a waiting traffic signal lamp and the vehicle running direction, and the monitoring data comprise the current time and the current traffic intersection brightness;

the working principle of the technical scheme is as follows: the acquisition module preferably comprises a vehicle monitoring unit, a brightness detection unit, a processing unit and a clock unit, the vehicle monitoring unit is used for acquiring vehicle original data, a vehicle monitoring camera arranged near each traffic signal lamp is preferably used as the vehicle monitoring unit, the brightness detection unit is used for acquiring partial monitoring original data, namely the brightness of the current traffic intersection, a brightness sensor is preferably adopted as a brightness detection unit, a clock unit is used for collecting another part of monitoring raw data, namely the current time, the processing unit is used for carrying out data processing on the original vehicle data to obtain the vehicle data containing the traffic stream length of the waiting traffic signal lamp and the vehicle driving direction of each vehicle, wherein the method of determining the vehicle traveling direction of each vehicle is preferably to determine the lane to which each vehicle belongs, determining the direction to be traveled by each vehicle according to the pre-acquired landmark arrow of the traveling direction of each lane; the traffic flow length is the vehicle queuing length; the traffic signal lamp time control module preferably comprises a second data acquisition unit, a second data analysis unit and a second execution unit, wherein the second data acquisition unit is used for acquiring monitoring data and vehicle data acquired by the acquisition module, the second data analysis unit analyzes the acquired monitoring data or vehicle data based on a preset second analysis standard to judge whether the signal display time of the current traffic signal lamp needs to be changed or not, if so, specific traffic signal lamp change time is output, and the second execution unit adjusts the signal display time of the traffic signal lamp according to the specific traffic signal lamp change time so that the signal display time of the traffic signal lamp at the current traffic intersection is gradually adjusted to be new traffic signal lamp change time; methods of adjusting the new traffic signal change time include, but are not limited to, green time or red time for adjusting the target driving direction by adding red time or green time for other driving directions;

the beneficial effects of the above technical scheme are: through the traffic signal lamp time control module, different signal display time of the traffic signal lamp is reasonably adjusted according to the traffic condition of the current traffic intersection, the command efficiency of the traffic signal lamp at the traffic intersection is improved, the traffic intersection is prevented from being jammed, and the urban traffic quality is improved.

In one embodiment, a smart city traffic light control system further comprises an energy-saving control module;

the energy-saving control module executes the following operations:

the preset traffic intersection brightness-traffic signal lamp brightness correspondence set comprises a plurality of groups of combinations of traffic intersection brightness and traffic signal lamp brightness, and the traffic intersection brightness and the traffic signal lamp brightness correspond to each other in each group of combinations of the traffic intersection brightness and the traffic signal lamp brightness;

the working principle and the beneficial effects of the technical scheme are as follows: the energy-saving control module preferably comprises a data acquisition unit, a data analysis unit and an execution unit, wherein the data acquisition unit is used for acquiring monitoring data acquired by the acquisition module, the data analysis unit is used for analyzing the acquired monitoring data based on a preset analysis standard and judging whether the brightness of the traffic signal lamp needs to be regulated or not at present, if so, a brightness control signal is output to the execution unit, and the execution unit is used for controlling the brightness of the traffic signal lamp according to the brightness control signal; the energy-saving control module is automatically started when the traffic signal lamp is started, after the energy-saving control module is started, the energy-saving control module sends a monitoring data request instruction to the acquisition module, and after the monitoring data sent by the acquisition module are acquired, the energy-saving control module performs required data extraction on the monitoring data to obtain the brightness of the current traffic intersection contained in the monitoring data; furthermore, the data extraction process can also be carried out in the acquisition module, the energy-saving control module sends a part of monitoring data request instruction to the acquisition module, and the brightness of the current traffic intersection sent by the acquisition module is directly acquired; after the energy-saving control module obtains the brightness of the current traffic intersection, screening out the brightness of a traffic signal lamp corresponding to the brightness of the current traffic intersection from a preset traffic intersection brightness-traffic signal lamp brightness corresponding set according to the brightness of the current traffic intersection for controlling the brightness of the traffic signal lamp, wherein the preset traffic intersection brightness-traffic signal lamp brightness corresponding set comprises a plurality of groups of combinations of the brightness of the traffic intersection and the brightness of the traffic signal lamp, and the brightness of the traffic intersection and the brightness of the traffic signal lamp in each group of combinations of the brightness of the traffic intersection and the brightness of the traffic signal lamp are in one-to-one correspondence; furthermore, the energy-saving control module and the brightness detection unit have the same on-off time, the time interval of the on-off time is preferably 1 hour, the energy-saving control module is turned off after controlling the brightness of the traffic signal lamp, and the next round of brightness control is started again until the time interval of the on-off time is finished, so that the energy consumption is reduced, and the service life of the equipment is prolonged; through energy-saving control module, according to monitoring luminance adjustment traffic signal's luminance, reasonable reduction traffic signal's luminance in daytime is of value to energy saving and emission reduction, reduces the energy consumption, improves traffic signal's life, reasonable improvement traffic signal's luminance in night, is of value to improving night vehicle and passes through safety, reduces the emergence of traffic accident.

In one embodiment, the traffic signal time control module performs operations comprising:

or the like, or, alternatively,

generating a corresponding second time control signal according to the change time of the traffic signal lamp corresponding to the first driving direction and the second driving direction to control the time change of the traffic signal lamp;

the working principle and the beneficial effects of the technical scheme are as follows: the traffic signal lamp time control module is automatically started when a traffic signal lamp is started, and after the traffic signal lamp time control module is started, a data request is sent to the acquisition module to obtain monitoring data and vehicle data acquired by the acquisition module, firstly, time change of the traffic signal lamp is controlled according to the monitoring data, pedestrian traffic volume in a city is greatly reduced at night, if the display time of the traffic signal lamp is still controlled according to the change time of the traffic signal lamp in the daytime, vehicle passing efficiency is greatly reduced, and waiting time of a vehicle is improved, the traffic signal lamp time control module is used for judging whether the current time contained in the acquired monitoring data is within a preset starting time range, the preset starting time range is preferably 23-5 points, and if the current time is within the preset starting time range, a predicted total pedestrian number corresponding to the current time is screened out from the preset current time-predicted total pedestrian number corresponding to the current time according to the current time in the monitoring data The system comprises a traffic intersection, a preset current time-total predicted pedestrian number corresponding set, a preset total pedestrian number corresponding set and a preset total pedestrian number corresponding set, wherein the preset current time-total predicted pedestrian number corresponding set corresponds to the total predicted pedestrian number one to one, a data source in the preset current time-total predicted pedestrian number corresponding set is obtained by researching a large amount of field data of a target city, and the total predicted pedestrian number is the total number of pedestrians waiting to pass through the traffic intersection at a corresponding time point; after the predicted total pedestrian number is obtained, screening out the traffic signal lamp change time corresponding to the predicted total pedestrian number from a preset step table of the predicted total pedestrian number and the traffic signal lamp change time according to the predicted total pedestrian number for controlling the time change of the traffic signal lamp; the method comprises the steps that the number of total pedestrians is predicted, wherein the number of total pedestrians is predicted in a preset step table of the change time of traffic signal lamps, the change time of the traffic signal lamps is the change time which is subjected to unified planning and is not conflicted on the time of all the traffic signal lamps, and all the traffic signal lamps comprise traffic signal lamps such as lane signal lamps and pedestrian signal lamps; furthermore, after the current time exceeds the preset starting time range, gradually adjusting the change time of the traffic signal lamp to the change time of the traffic signal lamp immediately before the preset starting time range; or the time change of the traffic signal lamp is controlled according to the vehicle data, when the urban traffic is in a rush hour, the traffic jam of the vehicle in a certain driving direction often exists, but the vehicles in the other driving direction are not enough, the other driving direction does not include the driving direction opposite to the driving direction of the traffic jam, so that the command efficiency of the traffic signal lamp is not high, if the traffic police are arranged to carry out on-site command, firstly, the time for the traffic police to arrive at the on-site is not fixed, so that the traffic jam condition cannot be solved in time, secondly, the urban traffic intersections have numerous conditions, and a great amount of human resources are wasted when each traffic intersection is arranged to carry out on-site command by the traffic police; the vehicle data acquired by the acquisition module is acquired through the traffic light time control module, and whether the traffic flow length of the waiting traffic light in any vehicle driving direction in the vehicle data is within a preset traffic flow length range is judged, wherein the preset traffic flow length range is preferably a normal traffic flow length range, and is preferably 30-90 m; if the traffic flow length of the waiting traffic signal lamp in any vehicle driving direction is not in the preset traffic flow length range and is larger than the maximum value of the preset traffic flow length range, judging whether the vehicle data has the vehicle driving direction of which the traffic flow length of the waiting traffic signal lamp in other vehicle driving directions is not in the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range; the other vehicle driving direction does not include a driving direction opposite to a vehicle driving direction in which the traffic flow length of the waiting traffic signal lamp is not within the preset traffic flow length range and is greater than the maximum value of the preset traffic flow length range; if the traffic flow length of the waiting traffic signal lamp in any vehicle running direction is not within the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, taking the vehicle running direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle running direction is not within the preset traffic flow length range and is larger than the maximum value of the preset traffic flow length range, as a first running direction; taking the vehicle running direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle running direction is not within the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, as a second running direction; the second direction of travel cannot be the opposite direction of travel to the first direction of travel; according to the first driving direction and the second driving direction, the traffic signal lamp change time corresponding to the first driving direction and the second driving direction is screened out from the preset first driving direction, the preset second driving direction and the preset traffic signal lamp change time in a centralized manner and is used for controlling the time change of the traffic signal lamp; namely, the passing time of the first driving direction is increased, and the passing time of the second driving direction is reduced; for example, at a traffic intersection, if the first driving direction is forward driving at the current intersection and the second driving direction is forward driving at the left intersection, the passing time of forward driving at the left intersection is reduced, and the passing time of forward driving at the current intersection is increased; further, it is not conflicting to control the time change of the traffic signal lamp according to the vehicle data or to control the time change of the traffic signal lamp through the monitoring data, and it is found from the investigation of the urban traffic situation that the probability of congestion occurring within the preset starting time range is extremely small, but in order to prevent the occurrence of the situation, the priority of the time change of the traffic signal lamp according to the vehicle data in the traffic signal lamp time control module is higher than the time change of the traffic signal lamp through the monitoring data.

Referring to fig. 2, in one embodiment, a smart city traffic light control system further includes: the special vehicle traffic smooth module;

the special vehicle traffic smooth module executes the following operations:

receiving the special vehicle running route and the special vehicle license plate information sent by the background terminal, and judging whether the special vehicle passes through the current traffic intersection according to the special vehicle running route;

and the combination of (a) and (b),

the traffic signal lamp change time corresponding to the driving direction of the special vehicle is intensively screened out from the preset driving direction of the special vehicle-traffic signal lamp change time according to the driving direction of the special vehicle and is used for controlling the time change of the traffic signal lamp,

and the combination of (a) and (b),

acquiring the number plate information of each vehicle with the same running direction as the special vehicle, taking the number plate information as comparison number plate information, and controlling the change time of the traffic signal lamp of the current traffic intersection to be adjusted to the change time of the previous traffic signal lamp if the comparison number plate information is the same as the number plate information of the special vehicle and the special vehicle passes through the current traffic intersection;

the working principle of the technical scheme is as follows: when a special vehicle needs to start, the special vehicle running route and the special vehicle license plate information are sent to the background terminal according to the preset communication equipment; the background terminal analyzes the traffic intersection through which the special vehicle running route needs to pass and sends the special vehicle running route and the special vehicle number plate information to the special vehicle smooth-passing module of the corresponding traffic intersection; the special vehicle traffic smooth module executes the following operations: receiving the running route and the license plate information of the special vehicle sent by the background terminal, wherein the running route of the special vehicle is obtained preferably by installing a positioning device on the special vehicle, obtaining the positioning information of the special vehicle by the positioning device and determining the running route of the special vehicle by judging the optimal route from the positioning information to the current intersection; if the actual driving route of the special vehicle deviates from the optimal route, the driving route of the special vehicle is changed again according to the actual driving route of the special vehicleDetermining an optimal route; judging whether the special vehicle passes through the current traffic intersection or not according to the running route of the special vehicle; if so, predicting the shortest passing time required by the special vehicle to drive to the current traffic intersection and starting to count down, obtaining the remaining time required by the special vehicle to drive to the current traffic intersection, wherein the prediction process comprises the steps of obtaining the distance between the special vehicle and the current intersection and the average driving speed of the special vehicle, preferably determining the distance between the special vehicle and the current intersection according to the optimal route, when the optimal route is changed, the distance between the special vehicle and the current intersection is also changed, determining the distance between the special vehicle and the current intersection according to the latest optimal route and the latest positioning information, wherein the method for acquiring the average running speed of the special vehicle preferably acquires the running speed of the special vehicle from the starting point in real time, and calculates the average running speed according to all acquired running speeds and the time spent on the special vehicle, so that the method is beneficial to improving the accuracy of the shortest passing time; the shortest passing time length is dynamic, the shortest passing time length is changed along with the distance between the special vehicle and the current intersection and the change of the average running speed of the special vehicle, the residual time length is always subtracted from the latest shortest passing time length, and the absolute value of the difference value of the time when counting down at the beginning minus the current time is subtracted, namely the residual time length is also changed along with the change of the shortest passing time length; predicting the shortest passing time according to the acquired data, and determining the running direction of the special vehicle passing through the current traffic intersection; acquiring a preset error time length, wherein the preset error time length is preferably the shortest time length which can reduce the waiting number of other waiting vehicles in the driving direction of the current special vehicle to 0; the method for obtaining the preset error duration is preferably to obtain the waiting number of other waiting vehicles in the driving direction of the current special vehicle, obtain the passing duration required by the passing of one vehicle through the traffic intersection under normal conditions, obtain the red light remaining duration in the driving direction of the current special vehicle, and multiply the waiting number by the passing duration and the red light remaining duration to obtain the preset error duration; namely the preset error time length is changed; when the remaining time length of the shortest passing time length is less than the preset error time length, the special vehicle is driven from the preset special vehicle according to the driving direction of the special vehicleThe change time of the traffic signal lamp corresponding to the running direction of the special vehicle is selected in a concentrated mode according to the running direction of the vehicle and the change time of the traffic signal lamp corresponding to the running direction of the special vehicle and is used for controlling the time change of the traffic signal lamp, wherein the preset change time of the traffic signal lamp corresponding to the running direction of the special vehicle and the change time of the traffic signal lamp corresponding to the change time of the traffic signal lamp in a concentrated mode is preferably the change time of the traffic signal lamp which enables the stopping vehicle in the running direction of the special vehicle to be 0 and guarantees that the traffic signal in the running direction of the special vehicle is green when the special vehicle reaches the traffic intersection, the specific change time of the traffic signal lamp is preferably the change time of the traffic signal lamp in the running direction of the special vehicle when the traffic signal lamp in the running direction of the special vehicle is green, the purpose is achieved by increasing the red light time in other running directions and increasing the green light time in the running direction of the special vehicle, and the increased green light time is the waiting number of other waiting vehicles in the running direction of the special vehicle multiplied by the traffic signal lamp required by the traffic intersection under the normal condition that the next vehicle passes the traffic intersection The sum of the excess time length and the preset supplementing time length is preferably 15s, and the preset supplementing time length is set to prevent the problem that the average running speed of the special vehicle is reduced to influence the shortest running time length due to the fact that the speed of the special vehicle is reduced due to unknown reasons, but the change time of a traffic signal lamp is adjusted at the moment, so that the special vehicle cannot pass through a traffic intersection on time; and obtaining the number plate information of each vehicle with the same running direction as the special vehicle, taking the number plate information as comparison number plate information, if the comparison number plate information is the same as the number plate information of the special vehicle and the special vehicle passes through the current traffic intersection, preferably judging that the special vehicle reaches the traffic intersection when the comparison number plate information is the same as the number plate information of the special vehicle, locking the special vehicle, and when the special vehicle disappears in the real-time image, judging that the special vehicle passes through the current traffic intersection, and canceling the locking; controlling the change time of the traffic signal lamp of the current traffic intersection to be adjusted to the change time of the previous traffic signal lamp; furthermore, after the special vehicle passes through a certain traffic intersection, the passing time of the special vehicle is recorded and sent to the background terminal, the background terminal sends the passing time of the special vehicle to a traffic intersection which the next special vehicle needs to pass through, and the next traffic intersection sends the passing time of the special vehicle to the traffic intersection which the next special vehicle needs to pass through according to the passing time of the special vehicleThe shortest time is determined again after the special vehicle passes through, which is beneficial to improving the success rate of the special vehicle which smoothly passes through the next traffic intersection without staying; furthermore, the running data of a plurality of special vehicles is obtained to calculate the average running time of the special vehicles between every two traffic intersections, and the calculation method comprises the following steps:

wherein, T_a,bThe average time of the special vehicles between the two traffic intersections a and b, y is the number of the special vehicles participating in the calculation, t_n,a,bThe time spent by the nth special vehicle in the special vehicles participating in the calculation when the special vehicle runs from the traffic intersection a to the traffic intersection b; after the average running time of the special vehicle between every two traffic intersections is obtained, when the average speed of the special vehicle cannot be obtained in the prediction stage, the average running time of the special vehicle between the two corresponding traffic intersections is used as the shortest passing time, and the fault-tolerant rate of the prediction stage is favorably improved;

the beneficial effects of the above technical scheme are: the special vehicles have priority passing rights when executing tasks, but when a certain traffic intersection is seriously blocked, the other vehicles can not be moved when trying to vacate the position for the special vehicles to pass preferentially, so that the special vehicles can not pass smoothly; or the traffic intersection waits too many vehicles, and the time for each vehicle to move to the position is added together, so that the passing efficiency of special vehicles is reduced; or the traffic intersection waits too many vehicles, and the special vehicle cannot pass through the traffic intersection quickly even if the traffic intersection signal lamp is changed into green when the special vehicle reaches the traffic intersection, so that the passing efficiency of the special vehicle is reduced; the special vehicle traffic smooth module is used for acquiring the distance condition of the special vehicle in advance, and adjusting the traffic signal of the required passing traffic intersection in advance, so that the special vehicle is prevented from being blocked by the traffic intersection when reaching the traffic intersection and being incapable of passing fast, and the special vehicle traffic efficiency is improved; the special vehicle can be prevented from running when the special vehicle reaches the traffic intersection because the traffic signal is the red light, and the special vehicle can be prevented from running when the red light is rushed, so that the safety of the special vehicle passing through the traffic intersection is improved.

Referring to fig. 2, in one embodiment, a smart city traffic light control system further includes: an accident area traffic signal lamp time adjusting module;

when the length of the first waiting traffic flow is within the preset traffic flow length range, controlling the change time of a traffic signal lamp of the current traffic intersection to be adjusted to the change time of the traffic signal lamp before the accident area exists;

the working principle of the technical scheme is as follows: acquiring a real-time traffic image within a preset range of a traffic intersection, wherein the acquisition method preferably acquires the traffic image in real time through a monitoring camera preset on a traffic signal lamp; judging whether an accident area exists in the real-time traffic flow image; the accidents comprise vehicle-to-person accidents and vehicle-to-vehicle accidents; the accident area judgment method comprises the following steps: if the real-time traffic flow image has a passable driving direction with any traffic signal lamp being a green lamp, and at least one vehicle on a road corresponding to the passable driving direction does not move within a preset moving time, the preset moving time is preferably 10s, and the preset moving time is set to prevent the misjudgment of an accident area traffic signal lamp time adjusting module caused by the reasons of small driving difference of a driver, slow starting and the like; judging that an accident area exists in the real-time traffic flow image, and taking a vehicle which is closest to the traffic signal lamp and does not move within a preset moving time as an accident vehicle; if an accident area exists in the real-time traffic flow image, judging whether accident vehicles in the accident area block the passing of other vehicles in the passable driving direction; the method for judging the barrier passage comprises the following steps: if the other vehicles behind the accident vehicle at the traffic flow queuing position do not move towards the traffic signal lamp direction within the preset moving time when the traffic signal lamp corresponding to the passable driving direction is green in the real-time traffic flow image, judging that the accident vehicle in the accident area blocks the passage of the other vehicles in the passable driving direction; generally, the position obstructing the passage of the vehicle behind is on the waiting road, and the case that the accident vehicle in the accident area obstructs the passage of other vehicles in the passable traveling direction is as follows: the car owners are reluctant to move the car to wait for the traffic police to arrive at the scene or the car fails to start when the accident such as scratch and rear-end collision occurs; if the accident vehicle in the accident area obstructs the passing of other vehicles in the passable traveling direction, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: the green light time of the passable driving direction is reduced, and the green light time of other driving directions of the corresponding traffic intersection is increased; acquiring the moving state of an accident vehicle in an accident area in real time, acquiring a first waiting traffic flow length in a passable driving direction and acquiring a second waiting traffic flow length in other driving directions of a corresponding traffic intersection if the accident vehicle starts to move; judging whether any second waiting traffic flow length in all other driving directions has a minimum value of which the second waiting traffic flow length is smaller than the preset traffic flow length range, and if so, taking the other driving directions of which the second waiting traffic flow length is smaller than the minimum value of the preset traffic flow length range as the driving direction adjustment directions; if the first waiting traffic flow length is larger than the maximum value of the preset traffic flow length range, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: increasing the green light time of the passable driving direction and reducing the green light time of adjusting the driving direction; when the length of the first waiting traffic flow is within the preset traffic flow length range, controlling the change time of a traffic signal lamp of the current traffic intersection to be adjusted to the change time of the traffic signal lamp before the accident area exists; furthermore, the priority of the traffic light time adjusting module in the accident area is higher than that of the traffic light time control module;

the beneficial effects of the above technical scheme are: when a traffic accident occurs at a traffic intersection, road congestion is often caused, even all vehicles in one driving direction stop moving seriously, and the road congestion phenomenon can be relieved until a traffic police arrives at the scene, but a large number of vehicles jammed on the accident road cannot rapidly pass through the traffic intersection after the traffic police arrives due to the fixed change time of a traffic signal lamp, so that the vehicles on the accident road are in a congestion state for a long time, if the traffic police conducts field command, human resources are wasted, the passing sequence of the vehicles on each road cannot be accurately regulated, a large amount of time is often spent to restore the normal traffic condition of the traffic intersection with the accident, and whether an accident area exists on a certain road of the traffic intersection or not is automatically judged through an accident area traffic signal lamp time regulation module, the method comprises the steps of automatically adjusting the change time of the driving direction of a traffic intersection signal lamp according to the driving direction related to an accident area, increasing the number of vehicles passing in other driving directions before the accident area is solved, reducing the number of waiting vehicles in other driving directions, and intelligently adjusting the change time of the driving direction of the traffic intersection signal lamp according to the driving direction related to the accident area and the number of waiting vehicles in other driving directions until the accident area is solved, so that the number of vehicles passing in the driving direction related to the accident area is increased, the traffic condition of the traffic intersection with the accident can be quickly recovered to be normal, the workload of traffic polices is favorably reduced, and the speed of recovering the traffic condition of the traffic intersection with the accident is increased.

Correspondingly, please refer to fig. 3, a method for controlling a smart city traffic light includes:

collecting vehicle data and monitoring data;

In one embodiment, a smart city traffic light control method further includes:

In one embodiment, controlling the temporal variation of the traffic signal light based on the environmental data or the vehicle data includes:

if so, screening a preset current time-total predicted pedestrian number corresponding set based on the current time to obtain the total predicted pedestrian number corresponding to the current time; screening a preset step table of total predicted pedestrian number-traffic light change time based on the total predicted pedestrian number to obtain traffic light change time corresponding to the total predicted pedestrian number;

generating a corresponding first time control signal according to the change time of the traffic signal lamp corresponding to the predicted total pedestrian number to control the time change of the traffic signal lamp;

or the like, or, alternatively,

acquiring vehicle running directions of all vehicles waiting for traffic signal lamps, and judging whether the traffic flow length of the vehicles waiting for the traffic signal lamps in any vehicle running direction is within a preset traffic flow length range or not;

if the traffic flow length of the waiting traffic signal lamp in any vehicle running direction is not within the preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, taking the vehicle running direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle running direction is not within the preset traffic flow length range and is larger than the maximum value of the preset traffic flow length range, as a first running direction; taking the vehicle driving direction, in which the traffic flow length of the waiting traffic signal lamp in the vehicle driving direction is not within a preset traffic flow length range and is smaller than the minimum value of the preset traffic flow length range, as a second driving direction;

screening a preset first driving direction-second driving direction-traffic light change time set based on the first driving direction and the second driving direction to obtain traffic light change time corresponding to the first driving direction and the second driving direction;

In one embodiment, a smart city traffic light control method further includes:

and the combination of (a) and (b),

In one embodiment, a smart city traffic light control method further includes:

The working principle and the beneficial effect of each technical scheme in the intelligent urban traffic signal lamp control method can refer to the working principle and the beneficial effect of the technical scheme of the corresponding functional module in the intelligent urban traffic signal lamp control system, and repeated description is not repeated here.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a wisdom city traffic signal lamp control system which characterized in that includes:

the acquisition module is used for acquiring vehicle data and monitoring data;

the vehicle data comprises the traffic flow length of a waiting traffic signal lamp and the vehicle driving direction, and the monitoring data comprises the current time and the current traffic intersection brightness.

2. The intelligent city traffic signal lamp control system according to claim 1, further comprising: an energy-saving control module;

the energy-saving control module executes the following operations:

the preset traffic intersection brightness-traffic signal lamp brightness correspondence set comprises a plurality of groups of combinations of traffic intersection brightness and traffic signal lamp brightness, and the traffic intersection brightness and the traffic signal lamp brightness correspond to each other in each group of combinations of traffic intersection brightness and traffic signal lamp brightness.

3. The system of claim 1, wherein the traffic signal time control module performs operations comprising:

or the like, or, alternatively,

4. The intelligent city traffic signal lamp control system according to claim 1, further comprising: the special vehicle traffic smooth module;

the special vehicle traffic smooth module executes the following operations:

and the combination of (a) and (b),

and acquiring the number plate information of each vehicle with the same running direction as the special vehicle, taking the number plate information as comparison number plate information, and controlling the change time of the traffic signal lamp of the current traffic intersection to be adjusted to the change time of the previous traffic signal lamp if the comparison number plate information is the same as the number plate information of the special vehicle and the special vehicle passes through the current traffic intersection.

5. The intelligent city traffic signal lamp control system according to claim 1, further comprising: an accident area traffic signal lamp time adjusting module;

the accident area judgment method comprises the following steps: if a passable driving direction with any traffic signal lamp as a green light exists in the real-time traffic flow image, and at least one vehicle does not move within a preset moving time exists on a road corresponding to the passable driving direction, judging that an accident area exists in the real-time traffic flow image, and taking the vehicle which is closest to the traffic signal lamp and does not move within the preset moving time as an accident vehicle;

if an accident area exists in the real-time traffic flow image, judging whether accident vehicles in the accident area obstruct other vehicles in the passable driving direction to pass;

if the accident vehicle in the accident area obstructs the passing of other vehicles in the passable traveling direction, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: reducing the green light time of the passable driving direction and increasing the green light time of other driving directions of the corresponding traffic intersection;

acquiring the moving state of an accident vehicle in an accident area in real time, and acquiring a first waiting traffic flow length in the passable driving direction and a second waiting traffic flow length in other driving directions of a corresponding traffic intersection if the accident vehicle starts to move;

judging whether any second waiting traffic flow length in the second traffic flow lengths in all other driving directions has a minimum value smaller than a preset traffic flow length range, and if so, taking the other driving directions of which the second waiting traffic flow lengths are smaller than the minimum value of the preset traffic flow length range as adjusted driving directions;

if the first waiting traffic flow length is larger than the maximum value of the preset traffic flow length range, the change time of the traffic signal lamp is adjusted, and the adjusting method comprises the following steps: increasing the green light time of the passable driving direction and reducing the green light time of the adjusting driving direction;

6. A smart city traffic signal lamp control method is characterized by comprising the following steps:

collecting vehicle data and monitoring data;

controlling a time variation of a traffic signal lamp based on the monitoring data or the vehicle data;

7. The intelligent city traffic signal lamp control method according to claim 6, further comprising:

8. The intelligent city traffic signal control method according to claim 6, wherein controlling the time variation of the traffic signal based on the environment data or the vehicle data comprises:

or the like, or, alternatively,

9. The intelligent city traffic signal lamp control method according to claim 6, further comprising:

and the combination of (a) and (b),

10. The intelligent city traffic signal lamp control method according to claim 6, further comprising: