CN110853339A - Pedestrian crossing self-adaptive system and method based on video detection - Google Patents
Pedestrian crossing self-adaptive system and method based on video detection Download PDFInfo
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- CN110853339A CN110853339A CN201911167562.4A CN201911167562A CN110853339A CN 110853339 A CN110853339 A CN 110853339A CN 201911167562 A CN201911167562 A CN 201911167562A CN 110853339 A CN110853339 A CN 110853339A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/005—Traffic control systems for road vehicles including pedestrian guidance indicator
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
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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
Abstract
The invention discloses a pedestrian crossing self-adaptive system and a pedestrian crossing self-adaptive method based on video detection, wherein the system comprises the following steps: the system comprises a front-end system, a network transmission system and a rear-end management system, wherein the front-end system is used for collecting pedestrian street-crossing data, transmitting the data to the rear-end management system and controlling the state of a signal lamp group; the back end management system receives the data transmitted by the front end system and sends the pedestrian crossing signal control parameters to the front end system; and the network transmission system realizes the transmission and exchange of data between the front-end system and the back-end management system. The invention realizes adaptive control through real-time changing pedestrian flow and vehicle flow, flexibly gives the motor vehicles and pedestrians the clearance time, and maximizes the passing efficiency of the pedestrian crossing facilities.
Description
Technical Field
The invention belongs to the technical field of traffic control and management, and particularly relates to a pedestrian crossing self-adaptive system and method based on video detection.
Background
The mutual interference between pedestrians and motor vehicles crossing the street on the road section is always a difficult problem in traffic control and management. Pedestrians are the largest-based traffic participants who are most prone to violating traffic regulations and are also vulnerable groups in traffic activities. There are two general ways to solve the mutual interference between the pedestrian crossing the street and the motor vehicle: one is to construct pedestrian overpasses or underground passages to realize the spatial separation of the overpasses and the underground passages; the other type adopts a pedestrian crossing signal control system: the pedestrian signal lamp and the motor vehicle signal lamp are built, and the separation of the pedestrian signal lamp and the motor vehicle signal lamp in time is realized. At present, a pedestrian street-crossing signal control system mainly adopts fixed-period control, the right of passage of motor vehicles is considered more, the pedestrian street-crossing fixed-period control can cause a great loss of green light time, unreasonable pedestrian street-crossing signal control often causes overlong pedestrian street-crossing waiting time, causes the pedestrian to cross the street in a violation of regulations, causes serious conflict between the pedestrian and the motor vehicles, and further causes frequent traffic accidents.
Therefore, how to provide a pedestrian crossing adaptive system and method based on video detection is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a video detection-based pedestrian street crossing adaptive system and method, which achieve adaptive control through pedestrian flow and vehicle flow which change in real time, flexibly give the release time to motor vehicles and pedestrians, and maximize the passing efficiency of pedestrian street crossing facilities.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pedestrian crossing adaptive system based on video detection comprises: a front-end system, a network transmission system and a back-end management system, wherein,
the front-end system collects pedestrian crossing data, transmits the data to the rear-end management system and controls the state of the signal lamp group;
the back end management system receives the data transmitted by the front end system and sends the pedestrian crossing signal control parameters to the front end system;
the network transmission system realizes the transmission and exchange of data between the front-end system and the back-end management system.
Preferably, the front-end system comprises a traffic signal controller and a pedestrian crossing waiting detection unit, the pedestrian crossing detection unit is used for collecting pedestrian crossing data, and the traffic signal controller is used for controlling the state of the signal lamp set.
Preferably, the pedestrian waiting for crossing detection unit comprises a people density camera, a pedestrian red light running camera or a pedestrian button.
Preferably, the rear end management system comprises an upper computer and a signal control networking platform, wherein the upper computer is used for processing pedestrian street crossing data; and the signal control networking platform is used for configuring the pedestrian crossing signal control related parameters of the road section and transmitting the control related parameters to the traffic signal controller, and monitoring the running state of the road section in real time and carrying out statistical analysis on data.
Preferably, relevant parameters of pedestrian crossing signal control of the configured road section support the front end to carry out field configuration through a human-computer interaction interface and carry out remote configuration on a signal control networking platform.
A pedestrian crossing self-adaptive method based on video detection is characterized in that a front-end system collects pedestrian crossing data, the data are transmitted to a rear-end management system through a network transmission system, the rear-end management system receives the data transmitted by the front-end system, pedestrian crossing signal control parameters are obtained after analysis and processing, the pedestrian crossing signal control parameters are sent to the front-end system through the network transmission system, and the front-end system controls the state of a signal lamp bank.
Preferably, the following pedestrian crossing control mode is adopted: waiting for pedestrian active control, pedestrian crossing induction signal control, pedestrian crossing coordination signal control or pedestrian crossing fixed period control.
Preferably, the active control method for the pedestrian waiting to cross the street comprises the following steps: if the pedestrian detection unit waiting to cross the street adopts a pedestrian red light running camera or a personnel density camera, after a detection area, an IP (Internet protocol) of a traffic signal controller and a port are configured in the corresponding camera, the camera can transmit traffic data to the traffic signal controller through a network at regular intervals, so that the active and accurate detection of the number of pedestrians crossing the street is realized; if the pedestrian waiting crossing detection unit adopts the pedestrian button, the pedestrian button transmits a signal to the traffic signal controller through the IO port after receiving the pedestrian request, and monitoring of the pedestrian crossing request is achieved.
Preferably, the pedestrian crossing sensing signal control method comprises the following steps:
s1: when the pedestrian crossing demand is not detected, the motor vehicle lamp is green, and the pedestrian crosses the street red;
s2: when the pedestrian crossing requirement is detected, judging whether the passing time of the motor vehicle reaches the minimum passing time or not and whether the pedestrian waiting time reaches the maximum waiting time or not, and executing a pedestrian release delay time program when any condition that the passing time of the motor vehicle is more than or equal to the minimum passing time or the pedestrian waiting time is more than or equal to the maximum waiting time is met;
s3: executing a pedestrian green light phase after the pedestrian release execution delay time is over;
s4: and after the pedestrian crossing green light phase is released, the main road is recovered to pass.
Preferably, the pedestrian crossing coordination signal control method comprises the following steps: in the time period or scene of the road section where the pedestrian crossing demand and the motor vehicle flow are large and stable, the pedestrian crossing signal control considers the coordination control with the signal lamps of the upstream and downstream intersections: the pedestrian crossing traffic signal controller realizes clock synchronization with the upstream and downstream intersection traffic signal controller through GPS timing, determines pedestrian green time and emptying time according to early investigation, obtains road section signal control period and motor vehicle green time according to upstream and downstream intersection signal timing schemes, calculates phase difference by combining the driving speed of the road section, realizes coordination control of a road section pedestrian crossing signal lamp and trunk green waves and trunk red waves of upstream and downstream intersections, and guarantees the crossing demand of pedestrians on the premise of preferentially guaranteeing traffic congestion.
The invention has the beneficial effects that:
according to the invention, the pedestrian street crossing data is collected through the front-end system, the data is transmitted to the rear-end management system, the rear-end management system analyzes and processes the data to obtain the pedestrian street crossing signal control parameter, the pedestrian street crossing signal control parameter is fed back to the front-end system, and the front-end system controls the state of the signal lamp bank, so that the adaptive control is realized through real-time changing pedestrian flow and vehicle flow, the release time is flexibly given to motor vehicles and pedestrians, and the passing efficiency of pedestrian street crossing facilities is maximized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a flow chart of a pedestrian crossing sensing signal control method according to the present invention.
FIG. 3 is a top view of the camera for pedestrian crossing the street to run the red light.
FIG. 4 is a top view of the camera for the secondary pedestrian crossing the street to run the red light.
FIG. 5 is a top view of a one-time street crossing people density camera of the present invention.
FIG. 6 is a top view of the secondary street crossing density camera of the present invention.
Fig. 7 is a top view of the button for the second pedestrian crossing.
Fig. 8 is a top view of the button for the second pedestrian crossing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a pedestrian crossing adaptive system based on video detection, comprising: the system comprises a front-end system, a network transmission system and a rear-end management system, wherein the front-end system is used for collecting pedestrian street-crossing data, transmitting the data to the rear-end management system and controlling the state of a signal lamp group; the back end management system receives the data transmitted by the front end system and sends the pedestrian crossing signal control parameters to the front end system; and the network transmission system realizes the transmission and exchange of data between the front-end system and the back-end management system. The invention realizes the signal control and the running state monitoring of the pedestrian crossing of the road section by the matching of the front-end system, the network transmission system and the rear-end management system, and improves the traffic efficiency of the motor vehicles of the main road as much as possible on the premise of ensuring the safety of the pedestrian crossing.
The front-end system comprises a traffic signal controller and a pedestrian waiting crossing detection unit, the pedestrian crossing detection unit is used for collecting pedestrian crossing data, and the traffic signal controller is used for controlling the state of the signal lamp set. An ARM9 series 32-bit chip is arranged in the traffic signal controller.
The pedestrian waiting crossing detection unit comprises a personnel density camera, a pedestrian red light running camera or a pedestrian button. The personnel density camera or the pedestrian red light running camera can transmit data such as equipment ID, the number of waiting pedestrians and the like to the traffic signal controller at regular time intervals through a network; the pedestrian button transmits a signal to the traffic signal controller through the IO port after receiving a pedestrian request, and the traffic signal controller performs logic judgment according to the number of pedestrians to determine whether to change the current signal lamp state. The detection precision of the pedestrian button under the normal operation condition is almost 100%, but in the actual measurement, the phenomenon of false alarm can be caused if the length of a connecting wire between the pedestrian button and a traffic signal controller exceeds 80 meters, so that the voltage difference at two ends of the wire can be caused, and further current can be generated. At the moment, a relay is required to be added between the pedestrian button and the traffic signal controller, the relay is triggered after the pedestrian button is pressed, and then the traffic signal controller is triggered by the relay.
The person density camera adopts a CMOS ultra-wide dynamic deep-focusing intelligent person density cylindrical network camera; a pedestrian red light running camera adopts a 1-inch 700-ten-thousand-pixel color progressive scanning CCD high-definition intelligent camera.
Because the erection mode, detection precision, application condition and the expansibility of pedestrian red light running camera and personnel density camera all have obvious difference, in practical application, please select more suitable equipment in the two according to different scenes, different user's demands. Under the condition of good weather in the daytime, the capture rate of the waiting pedestrians is more than or equal to 95 percent; the capture rate does not drop more than 10% at night or when weather conditions are poor. The number detection accuracy rate is more than or equal to 95% when the number of the pedestrians is less than 4 and the shielding among the pedestrians is less.
The arrangement scheme of the camera for pedestrians to run the red light for one time comprises the following steps:
the two cameras for pedestrians running the red light are erected on pedestrian signal lamps at the roadside, have the height of 3.5-4.5 meters and are respectively aligned with and cover the pedestrian waiting area at the other side, as shown in fig. 3. In order to have better effect, the colored paint is suggested to be coated on the pedestrian waiting area, the pedestrian waiting area is written, and the pedestrian waiting area is distinguished from other areas, so that the waiting behavior of the pedestrian can be normalized, and the detection area can be favorably determined for a camera.
When the length of the pedestrian crossing is more than 16m, a pedestrian secondary street-crossing safety island is arranged in the center of the pedestrian crossing. Therefore, when the length of the pedestrian crossing is more than 16m and the street-crossing safety island exists in the center of the road, secondary street crossing is adopted. The second street crossing is a street crossing mode that pedestrians walk from one side of a road to a central safety island in one period and walk from the safety island to the other side of the road in the next period.
The red light running camera layout scheme for the secondary street-crossing pedestrians:
the two cameras for the pedestrians to run the red light are arranged on the pedestrian signal light in the center of the road section, have the height of 3.5-4.5 meters, and are respectively aligned with and cover the pedestrian waiting areas on the two sides, as shown in fig. 4. The third pedestrian red light running camera is erected on a pedestrian signal lamp on any roadside, has the height of 3.5-4.5 meters and covers the central pedestrian waiting area. In order to have better effect, the colored paint is suggested to be coated on the pedestrian waiting area, the pedestrian waiting area is written, and the pedestrian waiting area is distinguished from other areas, so that the waiting behavior of the pedestrian can be normalized, and the detection area can be favorably determined for a camera.
During actual erection of the camera for pedestrians running the red light, the specification of the lens may need to be adjusted according to actual conditions, so that the view range of the camera can cover all areas of a pedestrian waiting area.
The arrangement scheme of the density camera for the once street-crossing personnel comprises the following steps:
the two personnel density cameras are erected on pedestrian signal lamps at two sides of a road section, have the height of 6-8 meters, and are respectively aligned with and cover pedestrian waiting areas at two sides, as shown in fig. 5. A personnel density camera is required to be arranged in each pedestrian waiting area, and the visual field of the camera is required to cover all areas where pedestrians wait.
The layout scheme of the density camera for the secondary street crossing personnel is as follows:
two personnel density cameras are arranged on pedestrian signal lamps at two sides of a road section, the height of each personnel density camera is 6-8 meters, the two personnel density cameras are respectively aligned with and cover pedestrian waiting areas at two sides, a third personnel density camera is arranged at one side of the pedestrian waiting area at the center of the road section, the height of each personnel density camera is 6-8 meters, and the third personnel density camera covers the pedestrian waiting area at the center, as shown in figure 6.
The one-time pedestrian crossing button layout scheme is as follows:
the two pedestrian buttons are arranged on the pedestrian signal lamp posts on the two sides of the road section, and the height is 1.2-1.5 meters, as shown in fig. 7. Each roadside pedestrian waiting area needs to be provided with a pedestrian button and corresponds to the street crossing requirements of pedestrians respectively. The pedestrian button mounting height is preferably in the range of 1.2-1.5 m. Typically, the pedestrian button is mounted on a pedestrian signal light pole, or may be mounted on a separate post.
The secondary street pedestrian button layout scheme:
the two pedestrian buttons are arranged on pedestrian signal lamp posts on two sides of a road section, the height is 1.2-1.5m, the central safety island needs to be provided with the two pedestrian buttons, the pedestrian buttons correspond to pedestrian crossing requirements in different directions respectively, and the installation height of the pedestrian buttons is preferably within the range of 1.2-1.5m, as shown in fig. 8.
The rear end management system comprises an upper computer and a signal control networking platform, and the upper computer is used for processing pedestrian street crossing data. The signal control networking platform is used for configuring relevant parameters of pedestrian crossing signal control on a road section to be issued to a traffic signal controller, wherein the relevant parameters comprise a phase scheme, a split green ratio, detector parameters and the like, and the parameters can be configured by a client side and uploaded by the traffic signal controller; secondly, monitoring the running state of the road section in real time, and displaying the pedestrian phase and the motor vehicle phase execution state of the road section in real time; thirdly, data statistics and analysis, the platform can count data such as the pedestrian street crossing request response times and the like, analyze the pedestrian arrival time distribution characteristics at different time intervals and provide data support for other related researches.
In another embodiment, relevant parameters of pedestrian crossing signal control of the configured road section support the front end to carry out field configuration through a human-computer interaction interface and carry out remote configuration on a signal control networking platform. The invention supports field configuration at the front end through a human-computer interaction interface and remote configuration at the center, and can configure relevant parameters including a phase scheme, a split green ratio, detector parameters and the like for pedestrian crossing signal control at a road section. And the remote monitoring of the running state of the road section and the statistical analysis of data are supported, and the pedestrian phase and the motor vehicle phase execution state of the road section are displayed in real time. In addition, remote maintenance operations such as remote restart, reset, upgrade and the like can be realized. The invention has high usability and maintainability.
The invention also provides a pedestrian crossing self-adaptive method based on video detection, wherein a front-end system collects pedestrian crossing data, the data is transmitted to a rear-end management system through a network transmission system, the rear-end management system receives the data transmitted by the front-end system, the data is analyzed and processed to obtain pedestrian crossing signal control parameters, the pedestrian crossing signal control parameters are transmitted to the front-end system through the network transmission system, and the front-end system controls the state of a signal lamp bank.
The invention adopts the following pedestrian crossing control mode: waiting for pedestrian active control, pedestrian crossing induction signal control, pedestrian crossing coordination signal control or pedestrian crossing fixed period control. The invention determines the equipment type, quantity, arrangement mode and point position of the front terminal system according to the factors such as pedestrian crossing signal control mode (active control of pedestrians waiting to cross the street, pedestrian crossing induction signal control, pedestrian crossing coordination signal control and pedestrian crossing fixed period control), pedestrian crossing crosswalk mode (primary crossing/secondary crossing), distance between the crossing crosswalk and upstream and downstream intersections, and the like.
The active control method for the pedestrian waiting for crossing the street comprises the following steps: if the scheme that the pedestrian runs the red light camera or the personnel density camera is adopted, after a detection area, an IP (Internet protocol) of a traffic signal controller and a port are configured in the pedestrian red light running camera or the personnel density camera, the pedestrian red light running camera or the personnel density camera can transmit traffic data such as equipment ID (identity), pedestrian waiting number and the like to the traffic signal controller through a network at certain time intervals (which can be set), so that the active and accurate detection of the number of pedestrians crossing the street is realized, and a data basis is provided for intelligent signal timing; if the pedestrian button scheme is adopted, the pedestrian button can transmit signals to the traffic signal controller through the IO port after receiving a pedestrian request, and monitoring of the pedestrian crossing request is achieved.
In a time period or scene with a small pedestrian crossing demand or large fluctuation, in order to avoid the phenomenon of green light free discharge in a fixed period and reduce the interference of frequent pedestrian phase switching on the motor vehicle flow of a road section, a pedestrian crossing sensing control method can be adopted, and referring to fig. 2, the pedestrian crossing sensing signal control method comprises the following steps:
s1: when the pedestrian crossing demand is not detected, the motor vehicle lamp is green, and the pedestrian crosses the street red light.
S2: after the pedestrian crossing requirement is detected, the motor vehicle may be just released soon after the green light, and whether the motor vehicle reaches the minimum passing time or not needs to be judged in order to guarantee the necessary passing time of the motor vehicle. Meanwhile, if the minimum transit time of the motor vehicle is set to be too long, the waiting time of the pedestrian is possibly too long, and research shows that the probability that the pedestrian runs the red light is greatly increased after the waiting time of the pedestrian exceeds the maximum waiting time, so that the system also needs to judge whether the waiting time of the pedestrian reaches the maximum waiting time. And (3) comprehensively considering two factors of motor vehicle passing efficiency and pedestrian crossing safety, and entering into a pedestrian clearance delay time execution program under the condition that the passing time of the motor vehicle is greater than or equal to the minimum passing time or the pedestrian waiting time is greater than or equal to the maximum waiting time.
S3: the pedestrian clearance delay time is implemented, the safety interval time is provided for the phase of the motor vehicle to change from green to red, the signal lamp of the motor vehicle can change the state according to the sequence from green to green flashing to yellow flashing, and the signal lamp of the pedestrian keeps the red state. After the pedestrian clearance delay time is executed, the traffic signal controller executes a pedestrian green light phase, at the moment, the motor vehicle signal lamp changes the state according to the sequence from yellow light to red light, and the pedestrian signal lamp changes the state according to the sequence from red light to green light;
s4: after the pedestrian green light time is executed, the pedestrian green light is switched to the pedestrian green flashing, and the purpose is to ensure that pedestrians entering the pedestrian crossing can safely arrive at the other side road. The green flashing time is set at a configuration client after being calculated according to parameters such as pedestrian crossing speed, distance and the like;
s5: after the pedestrian crosses the green sudden strain of a muscle phase place and lets go, resume the main road promptly and pass, the motor vehicle signal lamp becomes green light by the red light, and the pedestrian signal lamp becomes red light by green sudden strain of a muscle, and the pedestrian crosses street signal cycle and ends. The pedestrian crossing demand is constantly detected by the aid of the cyclic reciprocating mode, and the pedestrian crossing demand is met.
In the peak leveling period, such as the off-peak period or the off-peak period in the daytime of a common day or at night, the pedestrian crossing demand on the road section is generally small or the fluctuation is large, so that the phenomenon of green light free discharge in a fixed period is avoided, the interference of frequent pedestrian phase switching on the motor vehicle flow on the road section is reduced, a pedestrian crossing induction control method is adopted, namely, on the basis of simultaneously considering the maximum waiting time of pedestrians and the minimum passing time of motor vehicles, the pedestrian phase switching is carried out according to the real-time pedestrian crossing demand, and otherwise, the main road vehicle flow is always released.
The pedestrian crossing coordination signal control method comprises the following steps: in the time period or scene that the pedestrian crossing demand and the motor vehicle flow are large and stable, the pedestrian crossing signal control needs to be considered to be coordinated with the signal lamps of the upstream and downstream intersections: the pedestrian crossing traffic signal controller realizes clock synchronization with the upstream and downstream intersection traffic signal controller through GPS timing, determines pedestrian green time and emptying time according to early investigation, obtains road section signal control period and motor vehicle green time according to upstream and downstream intersection signal timing schemes, calculates phase difference by combining the driving speed of the road section, realizes coordination control of a road section pedestrian crossing signal lamp and trunk green waves, trunk red waves and the like of upstream and downstream intersections, and guarantees the crossing demand of pedestrians on the premise of preferentially guaranteeing traffic congestion.
In the peak period, the pedestrian crossing demand and the motor vehicle flow rate on the road section are large and stable, the pedestrian crossing signal control needs to be considered to be coordinated with the signal control of upstream and downstream intersections, the main problem at the moment is to avoid the situation that the vehicles stop on the road section to cause the idle discharge of green lights at the downstream intersections or the vehicles queue and overflow, and a fixed-period coordination control scheme is adopted. The pedestrian discharge and emptying time is determined according to previous investigation, and meanwhile, the road section signal control period and the motor vehicle green time are obtained according to the upstream and downstream intersection signal timing scheme, so that traffic jam is avoided at peak periods as much as possible, and the pedestrian crossing requirement is guaranteed.
Pedestrian crossing fixed period control: on one hand, when the pedestrian crossing demand of the road section is large and stable, the pedestrian crossing can be set as a fixed period control scheme; on the other hand, when the front-end pedestrian detection equipment breaks down, the system can automatically degrade to the fixed-period control, so that the stable and reliable operation of the system is ensured.
The pedestrian crossing data are collected through the front-end system, the data are transmitted to the rear-end management system, the rear-end management system analyzes and processes the data to obtain the pedestrian crossing signal control parameters, the pedestrian crossing signal control parameters are fed back to the front-end system, and the front-end system controls the state of the signal lamp bank, so that adaptive control is realized through real-time changing pedestrian flow and vehicle flow, the release time is flexibly given to motor vehicles and pedestrians, the passing efficiency of pedestrian crossing facilities is maximized, and the passing safety of pedestrians is ensured; in addition, the invention considers the right of passage of the motor vehicle and reduces the interference of the pedestrian crossing the street to the motor vehicle as much as possible.
In addition, the invention can also realize the warning and snapshot functions of the pedestrian running the red light by expanding the components such as the loudspeaker, the display screen and the like, and has higher expansibility.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pedestrian crossing adaptive system based on video detection is characterized by comprising: a front-end system, a network transmission system and a back-end management system, wherein,
the front-end system collects pedestrian crossing data, transmits the data to the rear-end management system and controls the state of the signal lamp group;
the back end management system receives the data transmitted by the front end system and sends the pedestrian crossing signal control parameters to the front end system;
the network transmission system realizes the transmission and exchange of data between the front-end system and the back-end management system.
2. The pedestrian crossing self-adaptive system based on video detection as claimed in claim 1, wherein the front-end system comprises a traffic signal controller and a pedestrian waiting crossing detection unit, the pedestrian crossing detection unit is used for collecting pedestrian crossing data, and the traffic signal controller is used for controlling the state of the signal light set.
3. The pedestrian crossing adaptive system based on video detection as claimed in claim 2, wherein the pedestrian crossing waiting detection unit comprises a people density camera, a pedestrian red light running camera or a pedestrian button.
4. The pedestrian street-crossing adaptive system based on video detection as claimed in claim 2 or 3, wherein the back-end management system comprises an upper computer and a signal control networking platform, wherein the upper computer is used for processing pedestrian street-crossing data; and the signal control networking platform is used for configuring the pedestrian crossing signal control related parameters of the road section and transmitting the control related parameters to the traffic signal controller, and monitoring the running state of the road section in real time and carrying out statistical analysis on data.
5. The pedestrian crossing adaptive system based on video detection as claimed in claim 4, wherein the configuration section pedestrian crossing signal control related parameters support the front end to perform field configuration through a human-computer interaction interface and perform remote configuration on a signal control networking platform.
6. A pedestrian crossing self-adaption method based on video detection is characterized in that a front-end system collects pedestrian crossing data, the data are transmitted to a rear-end management system through a network transmission system, the rear-end management system receives the data transmitted by the front-end system, pedestrian crossing signal control parameters are obtained after analysis and processing, the pedestrian crossing signal control parameters are sent to the front-end system through the network transmission system, and the front-end system controls the state of a signal lamp bank.
7. The pedestrian crossing adaptive method based on video detection according to claim 6 is characterized in that the following pedestrian crossing control mode is adopted: waiting for pedestrian active control, pedestrian crossing induction signal control, pedestrian crossing coordination signal control or pedestrian crossing fixed period control.
8. The pedestrian crossing adaptive method based on video detection according to claim 6, wherein the pedestrian crossing waiting active control method comprises the following steps: if the pedestrian detection unit waiting to cross the street adopts a pedestrian red light running camera or a personnel density camera, after a detection area, an IP (Internet protocol) of a traffic signal controller and a port are configured in the corresponding camera, the camera can transmit traffic data to the traffic signal controller through a network at regular intervals, so that the active and accurate detection of the number of pedestrians crossing the street is realized; if the pedestrian waiting crossing detection unit adopts the pedestrian button, the pedestrian button transmits a signal to the traffic signal controller through the IO port after receiving the pedestrian request, and monitoring of the pedestrian crossing request is achieved.
9. The pedestrian crossing adaptive method based on the video detection as claimed in claim 6, wherein the pedestrian crossing sensing signal control method comprises the following steps:
s1: when the pedestrian crossing demand is not detected, the motor vehicle lamp is green, and the pedestrian crosses the street red;
s2: when the pedestrian crossing requirement is detected, judging whether the passing time of the motor vehicle reaches the minimum passing time or not and whether the pedestrian waiting time reaches the maximum waiting time or not, and executing a pedestrian release delay time program when any condition that the passing time of the motor vehicle is more than or equal to the minimum passing time or the pedestrian waiting time is more than or equal to the maximum waiting time is met;
s3: executing a pedestrian green light phase after the pedestrian release execution delay time is over;
s4: and after the pedestrian crossing green light phase is released, the main road is recovered to pass.
10. The pedestrian crossing adaptive method based on video detection according to claim 6, wherein the pedestrian crossing coordination signal control method is as follows: in the time period or scene of the road section where the pedestrian crossing demand and the motor vehicle flow are large and stable, the pedestrian crossing signal control considers the coordination control with the signal lamps of the upstream and downstream intersections: the pedestrian crossing traffic signal controller realizes clock synchronization with the upstream and downstream intersection traffic signal controller through GPS timing, determines pedestrian green time and emptying time according to early investigation, obtains road section signal control period and motor vehicle green time according to upstream and downstream intersection signal timing schemes, calculates phase difference by combining the driving speed of the road section, realizes coordination control of a road section pedestrian crossing signal lamp and trunk green waves and trunk red waves of upstream and downstream intersections, and guarantees the crossing demand of pedestrians on the premise of preferentially guaranteeing traffic congestion.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111967370A (en) * | 2020-08-12 | 2020-11-20 | 广州小鹏车联网科技有限公司 | Traffic light identification method and device |
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