CN114170813A - Demand type released traffic control method - Google Patents
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- CN114170813A CN114170813A CN202010948668.4A CN202010948668A CN114170813A CN 114170813 A CN114170813 A CN 114170813A CN 202010948668 A CN202010948668 A CN 202010948668A CN 114170813 A CN114170813 A CN 114170813A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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Abstract
The invention relates to a demand type passing traffic control method which comprises a camera device, wherein a back-end system is connected to the camera device, the back-end system is connected with a signal lamp, and the back-end system is used for carrying out picture acquisition on the passing conditions of vehicles and pedestrians on the current road surface through the camera device. And the rear-end system analyzes and processes the lane of the current picture, determines the main lane and the secondary lane, determines whether the required release or the self-adaptive release is adopted, feeds back the analysis and processing result to the signal lamp control device, and controls the state of the corresponding signal lamp through the signal lamp control device. Therefore, when the traffic flow is not very high, the vehicle demand type release can be realized, when no vehicle needs to pass in one direction and a vehicle waits for a traffic release signal in the other direction, the traffic signal lamps can be switched in advance, and the time for the vehicle to wait for the traffic signal lamps is shortened.
Description
Technical Field
The invention relates to a management method, in particular to a demand type released traffic control method.
Background
Currently, the urbanization process is continuously promoted and the city scale is continuously enlarged in various countries, especially developing countries. Due to the advantages of urban medical treatment, working opportunities and entertainment, more and more people choose to work or live in cities, and the number of urban automobiles is gradually increased. The automobile brings convenience to people and influences the smoothness of urban traffic. Even in some road sections, the traffic is highly congested due to the over-saturation of the automobile, the time spent on driving the automobile even exceeds the walking time of people, and the normal life of the people is seriously disturbed. Traffic congestion has become an urban disease that plagues urban residents and urban managers. In order to reduce the degree of urban traffic jam, city managers are arduous, and some methods for improving the travel are proposed and implemented, for example, widening roads through road construction, adding more dredged road sections or through economic means,
the charging standard of the urban parking lot is improved. The methods reduce the degree of traffic jam to a certain extent, but the former method consumes a large amount of manpower and financial resources, increases the width and cannot catch up with the increase of the number of automobiles, and the latter method causes a certain economic burden to residents going out in urban areas by means of administrative interference. Therefore, the above approaches all have certain disadvantages.
In order to improve the rationality of dredging traffic flow from city planning, the prior art has some technical schemes of intelligently controlling the duration of traffic lights of crossing signal lights, and different duration of traffic lights are designed for the same signal light at different time periods according to the difference of traffic flow, so that the number of vehicles waiting for the red lights is reduced, and the utilization rate of roads is guaranteed. However, in the prior art, the duration of the signal light and the traffic light is fixed based on the time period and cannot be changed in a self-adaptive manner according to the flow of the intersection where the signal light is located, so that the technical scheme is relatively rigid and the intelligence level is low.
Meanwhile, according to the road traffic condition at night, because the interval time of the traffic signal lamps at night is fixed, and the traffic flow keeps more vehicles in the first flow direction, the traffic is unbalanced, and the time of drivers driving at night is wasted.
In view of the above-mentioned drawbacks, the designer actively makes research and innovation to create a demand-type traffic control method, so that the method has industrial application value.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method for demand-based release traffic control.
The invention discloses a demand-type released traffic control method, which comprises a camera device, wherein a back-end system is connected to the camera device, and the back-end system is connected with a signal lamp, and the method comprises the following steps:
the method comprises the following steps that firstly, a camera device is used for carrying out picture acquisition on the traffic conditions of vehicles and pedestrians on the current road surface;
secondly, the rear-end system analyzes and processes the lane of the current picture, determines primary and secondary main lanes and determines whether to adopt demand-type release or self-adaptive release;
thirdly, feeding back the analysis processing result to the signal lamp control device;
and step four, controlling the state of the corresponding signal lamp through the signal lamp control device.
Further, in the first step, the camera device includes a reverse camera and a forward electronic warning camera, the reverse camera obtains information of vehicles and pedestrians on an opposite lane, and the forward electronic warning camera obtains information of vehicles and pedestrians on a current lane.
Furthermore, in the second step, the passing time and the waiting time of the vehicle in one traffic light period are calculated, the lane with longer passing time or longer waiting time is set as the main road, and the other lanes are sequentially divided into the secondary roads according to the descending time.
Furthermore, in the second step, corresponding operations are executed by comparing the pictures of the reverse camera and the forward electric police camera whether a one-way traffic demand or a two-way traffic demand exists.
Furthermore, in the method for demand-based release traffic control, if the back-end system determines that there is a traffic release demand in one direction and there is no release demand in the other direction through the collected images, the traffic lights are switched in advance, and sufficient release time is given but not more than the maximum release time, so that vehicles in the direction wait for the traffic lights as little as possible.
Furthermore, in the method for controlling demand-type released traffic, the maximum release time is an average value of regular passing times of the back-end system at the same time through the same previous intersection.
Furthermore, in the second step, if the acquired images are judged, if there is a traffic release demand in both directions, the back-end system gives the main road vehicle priority enough time without exceeding the maximum release time until there is no release demand in the direction or the maximum release time is reached, and then switches to the other direction for release; and if the two directions have no release requirements, controlling the traffic signal lamps according to the default release configuration of the system to ensure that the longest release time of the main road is reached.
Still further, the demand-type released traffic control method is characterized in that a pedestrian hand clapper is arranged at the intersection, a passing button is arranged on the pedestrian hand clapper, when the pedestrian needs to cross the street, the button is pressed down, a signal lamp sends a pedestrian street-crossing demand to a rear-end system, the demand instruction comprises position information of the button, namely the intersection where the pedestrian needs to pass, the demand is also sent to a corresponding traffic light interface through a main contact point of the system, whether the switching to the green light state is suitable or not is judged by combining the current traffic light state and the vehicle passing demand, and if no vehicle passing demand exists, the shortest releasing time of pressing the green light at other intersections is considered and calculated.
By the scheme, the invention at least has the following advantages:
1. the vehicle demand type release can be realized when the traffic flow is not very high (for example, when the number of vehicles is less at night), when no vehicle needs to pass in one direction and a vehicle waits for a traffic release signal in the other direction, the traffic signal lamps can be switched in advance, and the time for the vehicle to wait for the traffic signal lamps is shortened.
2. The system can effectively combine video analysis to detect whether vehicles are waiting for passing or not, whether the waiting vehicles are going straight or turning left or not, and send the analysis result to the traffic signal lamp control host through a trunk node signal or a network signal and the like, and the traffic signal lamp control host adjusts the traffic light state to improve the execution efficiency.
3. Can supply the pedestrian initiative and with traffic signal lamp's interactive means, both can improve current efficiency, have the safety awareness that can improve pedestrian cooperation signal lamp.
4. The existing camera can be effectively utilized, and the implementation cost is low.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The demand type released traffic control method comprises a camera device, wherein a back-end system is connected to the camera device and is connected with a signal lamp, and the method is characterized by comprising the following steps:
firstly, the camera device carries out picture collection on the traffic conditions of vehicles and pedestrians on the current road surface. Specifically, in order to realize the full-coverage comprehensive picture acquisition of the lane, and to apply the existing hardware equipment as far as possible, and reduce the implementation cost, the camera device comprises a reverse camera and a forward electric warning camera which are arranged in the forward direction, in the implementation, the information of the vehicles and the pedestrians in the opposite lane is acquired through the reverse camera, and the information of the vehicles and the pedestrians in the opposite lane is acquired through the forward electric warning camera.
And then, the rear-end system analyzes and processes the lane of the current picture, determines the main lane and the secondary lane, determines whether to adopt demand-type release or self-adaptive release, and feeds back the analysis and processing result to the signal lamp control device. And controlling the state of the corresponding signal lamp through the signal lamp control device.
Specifically, the back-end system calculates the passing time and the waiting time of the vehicle in a traffic light period, the lane with longer passing time or longer waiting time is set as a main road, and other lanes are sequentially divided into secondary roads according to the descending of time. Simultaneously, for the intelligent management and control of better realization release demand, there is the current demand of unilateral through the picture contrast of reverse camera, forward electric police camera, still has the current demand of bidirectional, carries out corresponding operation.
In combination with practical implementation, if the back-end system judges that there is a traffic release demand in one direction and there is no release demand in the other direction through the collected pictures, the traffic signal lamp is switched in advance, and enough release time is given but not more than the maximum release time, so that vehicles in the direction wait for the traffic signal lamp as little as possible. For example, if there is a vehicle waiting for a red light in the east-west direction and there is no traffic clearance in the north-south direction when a green light is turned on, the east-west direction is switched to the green light in advance. In consideration of implementation convenience, the maximum passing time is the average value of the regular passing time of the back-end system at the same time through the same intersection, and a better time reference is given.
Further, the back-end system judges through the collected pictures, if the traffic release requirements exist in both directions, the main road vehicle is given enough time preferentially, but the maximum release time is not exceeded, and the main road vehicle is switched to the other direction for release until no release requirement exists in the direction or the maximum release time is reached. And if the two directions have no release requirements, controlling the traffic signal lamps according to the default release configuration of the system to ensure that the longest release time of the main road is reached.
Still further, in order to provide targeted auxiliary release for pedestrians and take the pedestrian's convenience of crossing the road into consideration on the premise of meeting the requirement of vehicle passing, the pedestrian hand clap is arranged at the intersection, and the passing button is arranged on the pedestrian hand clap. When the pedestrian needs to cross the street, the button is pressed, the signal lamp sends a pedestrian crossing demand to the rear-end system, the demand instruction contains the position information of the button, namely the intersection that the pedestrian needs to pass through, the demand can also be sent to the traffic light interface corresponding to the demand instruction through the connection of the main contact point of the system, and the current traffic light state and the vehicle passing demand are combined to judge whether the traffic light state is suitable for being switched to, so that the pedestrian can cross the street conveniently. If the vehicle passing requirement does not exist, the situation that the vehicle passes at other intersections according to the shortest passing time of the green light is considered and calculated. Thereby switching to the crossing as fast as possible.
The working principle of the invention is as follows:
the normal signal control mode adopts four-stage control: east-west direct movement, east-west left turn, south-north direct movement, south-north left turn. Also, alternative clearance schemes may be employed, which may include east clearance, west clearance, south clearance, north clearance.
In connection with the control of the signal lights:
1) the method comprises the steps that the requirements of buttons of vehicles or pedestrians in other directions are obtained within the first T seconds after a green light is operated in the main road direction, immediate response is not carried out, and stage switching can be carried out after T seconds, so that the influence on green light release of the main road is reduced;
2) the timing is started after the green light is operated in the main road direction, if no other direction demands exist in N seconds, the system provides a demand, and the intersection is released to operate for a period according to 4 stages, so that the situation that the detector cannot normally return to the signal machine under special conditions to cause the actual vehicle to be unable to pass is prevented;
3) when a left turn or a straight run in one direction comes at the same time, and no vehicle exists in the other direction, a straight run left turn and simultaneously release stage in the direction is triggered (the alternative stage does not appear in other operation modes).
In combination with the control of a hand-clapping rod of a pedestrian:
1) during the detection period, the video detection can provide effective vehicle signals, and corresponding release requirements are generated.
2) The condition of temporary missed inspection is repaired and optimized through testing, and the waiting release requirement of the bus is distinguished.
3) The pedestrian presses a hand-clapping button to trigger the release requirement, or the number of the accumulated street-crossing people reaches the set number to trigger the release requirement.
4) Effective signal delay is less than or equal to X seconds, the functions are satisfied, and the release effect is not influenced.
5) When no vehicle in other directions requests for releasing, the vehicle can be released in an alternative stage aiming at the vehicle waiting to move left, and local self-induction optimization releasing selection is realized.
The above description shows that the invention has the following advantages:
1. the vehicle demand type release can be realized when the traffic flow is not very high (for example, when the number of vehicles is less at night), when no vehicle needs to pass in one direction and a vehicle waits for a traffic release signal in the other direction, the traffic signal lamps can be switched in advance, and the time for the vehicle to wait for the traffic signal lamps is shortened.
2. The system can effectively combine video analysis to detect whether vehicles are waiting for passing or not, whether the waiting vehicles are going straight or turning left or not, and send the analysis result to the traffic signal lamp control host through a trunk node signal or a network signal and the like, and the traffic signal lamp control host adjusts the traffic light state to improve the execution efficiency.
3. Can supply the pedestrian initiative and with traffic signal lamp's interactive means, both can improve current efficiency, have the safety awareness that can improve pedestrian cooperation signal lamp.
4. The existing camera can be effectively utilized, and the implementation cost is low.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The demand type passing traffic control method comprises a camera device, a back end system is connected on the camera device and is connected with a signal lamp,
the method is characterized by comprising the following steps:
the method comprises the following steps that firstly, a camera device is used for carrying out picture acquisition on the traffic conditions of vehicles and pedestrians on the current road surface;
secondly, the rear-end system analyzes and processes the lane of the current picture, determines primary and secondary main lanes and determines whether to adopt demand-type release or self-adaptive release;
thirdly, feeding back the analysis processing result to the signal lamp control device;
and step four, controlling the state of the corresponding signal lamp through the signal lamp control device.
2. The on-demand passing traffic control method according to claim 1, characterized in that: in the first step, the camera device comprises a reverse camera and a forward electric warning camera, the reverse camera and the forward electric warning camera are arranged in the reverse direction, information of vehicles and pedestrians on the opposite lane is obtained through the reverse camera, and information of vehicles and pedestrians on the opposite lane is obtained through the forward electric warning camera.
3. The on-demand passing traffic control method according to claim 1, characterized in that: and in the second step, the passing time and the waiting time of the vehicle in one traffic light period are calculated, the lane with longer passing time or longer waiting time is set as a main road, and other lanes are sequentially divided into secondary roads according to the descending of time.
4. The on-demand passing traffic control method according to claim 1, characterized in that: in the second step, corresponding operation is executed according to whether the pictures of the backward camera and the forward electric police camera have one-way passing requirements or two-way passing requirements.
5. The on-demand passing traffic control method according to claim 4, characterized in that: and if the rear-end system judges that one direction has a traffic release requirement and the other direction has no release requirement through the acquired pictures, the traffic signal lamp is switched in advance, and enough release time is given but not more than the maximum release time, so that vehicles in the direction wait for the traffic signal lamp as little as possible.
6. The on-demand passing traffic control method according to claim 5, characterized in that: the maximum passing time is the average value of the conventional passing time of the back-end system at the same time through the same intersection.
7. The on-demand passing traffic control method according to claim 4, characterized in that: in the second step, the back-end system judges through the collected pictures, if the two directions have traffic release requirements, the main road vehicle is given enough time preferentially without exceeding the maximum release time until no release requirement exists in the direction or the maximum release time is reached, and then the other direction is switched to release; and if the two directions have no release requirements, controlling the traffic signal lamps according to the default release configuration of the system to ensure that the longest release time of the main road is reached.
8. The on-demand passing traffic control method according to claim 1, characterized in that: the pedestrian hand clapping bar is arranged at the intersection, a passing button is configured on the pedestrian hand clapping bar, when a pedestrian needs to cross the street, the button is pressed down, the signal lamp sends a pedestrian crossing requirement to the rear end system, the requirement instruction contains the position information of the button, namely the intersection through which the pedestrian needs to pass, the requirement can also be sent to a traffic light interface corresponding to the requirement through the connection of the main contact point of the system, whether the switching to the green light state is suitable or not is judged by combining the current traffic light state and the vehicle passing requirement, and if no vehicle passing requirement exists, the shortest passing time of the green light pressing at other intersections is considered and calculated.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114898570A (en) * | 2022-05-12 | 2022-08-12 | 山东高速股份有限公司 | Elastic passing method for expressway in severe weather |
| CN115938141A (en) * | 2023-03-15 | 2023-04-07 | 昆明理工大学 | Sidewalk traffic signal lamp with dynamic identification and intelligent adjustment functions |
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Application publication date: 20220311 |