CN112396825A - Non-contact pedestrian crossing control system and method applied to intersection - Google Patents
Non-contact pedestrian crossing control system and method applied to intersection Download PDFInfo
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- CN112396825A CN112396825A CN202011088922.4A CN202011088922A CN112396825A CN 112396825 A CN112396825 A CN 112396825A CN 202011088922 A CN202011088922 A CN 202011088922A CN 112396825 A CN112396825 A CN 112396825A
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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
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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
Abstract
The invention discloses a non-contact pedestrian street crossing control system and method applied to an intersection, which comprises the following steps: the system comprises a front-end detector, a rear-end detector, a traffic signal controller, a pedestrian prompting module, a signal center system, a signal lamp and a countdown timer; the invention collects the states of the pedestrians crossing the street in real time by combining the front end detector and the rear end detector, can realize the pedestrian clearance requirements in four directions at the intersection and carries out safety early warning on the pedestrians crossing the street through the human-computer interaction module.
Description
Technical Field
The invention belongs to the technical field of road traffic control, and particularly relates to a non-contact pedestrian street crossing control method applied to an intersection.
Background
In recent years, with the development of urbanization and the rapid increase of automobile holding capacity, urban traffic problems such as traffic jam and accidents of people and vehicles become more serious, and the right of passage of pedestrians and vehicles at intersections competes with the right of passage of roads. However, in the time of the secondary main road and at night, when the traffic flow and the pedestrian demand in a certain direction are less, under the premise of ensuring the safe passing of the pedestrian, the intersection will generate a larger empty condition. Therefore, whether the traffic efficiency of the road vehicles can be improved and the safety of pedestrians crossing the street can be guaranteed is very important for the urban intelligent traffic control system.
At present, the control modes of a traffic control system for pedestrian release include an intersection fixed signal cycle triggering mode, a button type triggering mode and a non-contact triggering mode of a single video detection device.
The intersection fixed signal period triggering mode has higher requirements on the pedestrian crossing phase release duration configuration in the same direction. When the pedestrian passing time is configured to be the minimum green light time, the passing requirements of the crowds such as the old, the young, women and children needing more passing time cannot be met, so that the potential safety hazard of traffic accidents is greater; when the pedestrian passing time is set to be relatively long, although the safe passing of the pedestrians can be ensured, under the condition that the pedestrians and the motor vehicles pass less at a certain secondary main road intersection or at night, the large empty condition such as empty can be caused, the vehicle passing time in the main direction is relatively less than the whole signal period, and the passing efficiency of the vehicles at the intersection is reduced.
The button type triggering mode has the following problems:
firstly, the button physical device is easy to damage after being frequently pressed for a long time;
secondly, the safety of the pedestrians crossing the street cannot be guaranteed, if the pedestrians press the button, the pedestrians cannot pass the street after the green light is turned on, or the pedestrians do not press the button and directly run the red light to pass the street;
and thirdly, if someone maliciously presses the button for multiple times, the phenomenon that road motor vehicles are not released for a long time and serious congestion occurs can be caused.
The non-contact triggering mode of the single video detection device is greatly influenced by factors such as light and weather due to the fact that videos, and under the condition that the light is weak such as rainy days, foggy days and nights, the accuracy of pedestrian detection is not high, and the conditions of missing judgment and misjudgment exist, so that pedestrians are not released or are not released in a waiting area, and the pedestrians are caused to run a red light. Once the video detector is damaged and cannot be overhauled in time, the condition that pedestrians run the red light due to the fact that the pedestrians cross the street and cannot pass through the street can be caused.
The existing pedestrian street-crossing non-contact control method is generally only applied to road section design, the release phase of motor vehicles on the road section is relatively simple, the traffic operation condition of an intersection is much more complex, and the traffic flow is relatively large. In addition, single detection equipment is generally adopted in the prior art, and the detection equipment is placed outdoors, so that the detection equipment is greatly influenced by the environment, and the problem that the accuracy of the detection result of the pedestrian crossing state is not high exists.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a non-contact pedestrian street crossing control system and a non-contact pedestrian street crossing control method applied to an intersection so as to solve the problems that potential safety hazards exist when pedestrians cross the street at the intersection and vehicle passing efficiency is low in a secondary main road and at night in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention relates to a non-contact pedestrian street-crossing control system applied to an intersection, which comprises: the system comprises a front-end detector, a rear-end detector, a traffic signal controller (signal machine), a pedestrian prompting module, a signal center system, a signal lamp and a countdown;
the front-end detector adopts a pedestrian detector erected beside a pedestrian crossing line, collects pedestrian state information in real time and sends a detection result to the traffic signal controller;
the rear-end detector adopts a road surface monitoring probe erected at the intersection and sends monitoring video data acquired in real time to the signal center system;
the signal center system analyzes the received monitoring video data to obtain a pedestrian detection result and sends the pedestrian detection result to the traffic signal controller;
the traffic signal controller judges the received pedestrian detection result, adjusts and outputs the signal lamp and countdown of the corresponding intersection again when the pedestrian needs to cross the street, and sends the execution result to the signal center system;
the pedestrian prompting module is used for carrying out safety early warning on pedestrians crossing the street;
and the signal lamp and the countdown display the corresponding color and the remaining time of the traffic signal lamp in a countdown per second mode and are used for prompting the remaining passing time of the pedestrians crossing the street.
Furthermore, the traffic signal controller adopts multiple control modes of single-point optimization, single-point induction and non-contact pedestrian crossing, and adjustment of pedestrian clearance time under the condition of different flow rates is realized.
Further, when the pedestrian prompting module detects that a pedestrian is not waiting in the waiting area, displaying 'please wait in the waiting area', and voice broadcasting a prompt; and when the situation that pedestrians wait for crossing the street in the waiting area and pedestrians stay in the waiting area but do not cross the street is detected, displaying 'please wait outside the waiting area', and carrying out voice broadcast reminding.
Further, the front-end detector acquires a detection area image with a camera unit.
Further, the front-end detector processes the acquired image, extracts feature information, and identifies and tracks the pedestrian in the detection area as a target to obtain a pedestrian detection result.
The invention relates to a working method of a non-contact pedestrian street crossing control system applied to an intersection, which is based on the system and comprises the following steps:
1) the traffic signal control machine detects whether a pedestrian crossing request exists; if not, the motor vehicle phase enters a release stage, and the pedestrian crossing the street is a red light; if yes, judging whether the traffic signal controller operates in a pedestrian phase, if yes, executing the step 2), otherwise, prompting pedestrians to wait through a pedestrian prompting module and executing the step 3);
2) the traffic signal controller judges whether the pedestrian phase runs within a countdown threshold value or not; if yes, the traffic signal controller delays to process the pedestrian crossing request, the pedestrian is prompted to wait through the pedestrian prompting module, corresponding pedestrian phase light color and release time are output according to pedestrian state information when the pedestrian phase is operated in the next period to respond to the crossing request, and pedestrians pass in the pedestrian phase release stage until the pedestrian phase is finished; otherwise, executing step 4);
3) the traffic signal controller judges whether the pedestrian crosses the street or not; if so, the pedestrian waits for the pedestrian phase release stage to pass until the pedestrian phase is finished; otherwise, the traffic signal controller outputs corresponding pedestrian phase light color and release time according to the pedestrian state information, and the pedestrian passes when waiting to the pedestrian phase release stage until the pedestrian phase is finished;
4) the traffic signal controller judges whether the pedestrian crosses the street or not; if the pedestrian crossing is triggered and the pedestrian clearance time is less than the maximum passing time, the traffic signal controller adjusts the pedestrian crossing clearance time according to the pedestrian state information to ensure that the pedestrian safely passes the street, and the pedestrian passes in the pedestrian phase clearance stage until the pedestrian phase is finished; if the pedestrian passing time is larger than the maximum passing time when the pedestrian crossing is triggered, the pedestrian phase is ended; if the pedestrian crossing the street is not triggered, executing the step 5);
5) the traffic signal control machine detects whether a pedestrian track exists on the pedestrian crossing; if the pedestrian passing time reaches a certain time threshold (the threshold can be set by combining the actual conditions of the intersection and is usually set as 2/3 of the pedestrian passing time), the pedestrian still does not pass through the middle position of the zebra crossing, the traffic signal controller prolongs the pedestrian passing time and does not exceed the maximum passing time of the pedestrian, and the pedestrian prompting module prompts the pedestrian to pass as soon as possible until the pedestrian phase is finished; otherwise, the traffic signal controller adjusts the pedestrian passing time to be the minimum passing time, and the pedestrian prompting module prompts the pedestrian to stand outside the waiting area for waiting;
6) and (3) after the traffic signal controller detects that the pedestrian phase is finished, the motor vehicle phase enters a release stage, the pedestrian crossing is a red light, and the step 1) is executed.
The signal center system and the traffic signal controller carry out data interaction. On one hand, the signal center system analyzes data provided by the rear-end detector and sends an analyzed pedestrian detection result to the traffic signal controller; and on the other hand, the signal center system analyzes the pedestrian crossing processing result reported by the traffic signal controller, and evaluates the accuracy and reliability of the whole control system. In addition, the signal center system can send degradation processing instructions to the traffic signal controller in severe weather so as to ensure that the control system can operate reliably and stably.
The invention has the beneficial effects that:
1. the invention collects pedestrian state information at the intersection in real time by the way of mutually complementing and combining the front-end detector and the rear-end detector, provides a reliable data source for the control system, and improves the accuracy, reliability and stability of the system.
2. The rear-end detector adopts a road surface monitoring probe which is used for collecting the whole road surface traffic information and sending the road surface traffic information to a signal center system for monitoring and analyzing in daily life.
3. The pedestrian prompting module has the functions of prompting screen display and voice prompt, can realize a man-machine interaction mode, provides safety early warning for pedestrians crossing the street, and further ensures the safety of the pedestrians crossing the street.
4. The pedestrian clearance time adjusting system realizes adjustment of pedestrian clearance time under the condition of different flow rates through multiple signal control modes such as single-point optimization, single-point induction and non-contact pedestrian crossing control, and improves the applicability of the system.
Drawings
FIG. 1 is a system architecture diagram of the present invention;
FIG. 2 is a control flow diagram of the present invention;
fig. 3 is a diagram of the intersection layout structure of the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1, the non-contact pedestrian crossing control system applied to an intersection of the invention comprises: the system comprises a front-end detector, a rear-end detector, a traffic signal controller (signal machine), a pedestrian prompting module, a signal center system, a signal lamp and a countdown;
the front-end detector adopts a pedestrian detector erected beside a pedestrian crossing line, collects pedestrian state information in real time and sends a detection result to the traffic signal controller; the front-end detector takes a pedestrian waiting area and a pedestrian crossing block as detection areas, and a camera unit is used for acquiring images of the detection areas; the front-end detector processes the acquired image, extracts characteristic information, identifies and tracks pedestrians in the detection area as targets, obtains the number of pedestrians waiting for crossing the street and crossing the street, and takes the number of pedestrians as a pedestrian detection result.
The rear-end detector adopts a road surface monitoring probe erected at the intersection and sends monitoring video data acquired in real time to the signal center system;
the signal center system analyzes the received monitoring video data to obtain a pedestrian detection result and sends the pedestrian detection result to the traffic signal controller;
the traffic signal controller judges the received pedestrian detection result, adjusts and outputs the signal lamp and countdown of the corresponding intersection again when the pedestrian needs to cross the street, and sends the execution result to the signal center system; the traffic signal controller adopts multiple control modes of single-point optimization, single-point induction and non-contact pedestrian crossing, and adjusts pedestrian clearance time under the condition of different flow rates.
The pedestrian prompting module is used for carrying out safety early warning on pedestrians crossing the street; when the pedestrian prompting module detects that a pedestrian is not waiting in the waiting area, displaying 'please wait in the waiting area', and voice broadcasting a prompt; and when the situation that pedestrians wait for crossing the street in the waiting area and pedestrians stay in the waiting area but do not cross the street is detected, displaying 'please wait outside the waiting area', and carrying out voice broadcast reminding.
And the signal lamp and the countdown display the corresponding color and the remaining time of the traffic signal lamp in a countdown per second mode and are used for prompting the remaining passing time of the pedestrians crossing the street.
Referring to fig. 2, the working method of the non-contact pedestrian crossing control system applied to the intersection of the invention is based on the system and comprises the following steps:
1) the traffic signal control machine detects whether a pedestrian crossing request exists; if not, the motor vehicle phase enters a release stage, and the pedestrian crossing the street is a red light; if yes, judging whether the traffic signal controller operates in a pedestrian phase, if yes, executing the step 2), otherwise, prompting pedestrians to wait through a pedestrian prompting module and executing the step 3);
2) the traffic signal controller judges whether the pedestrian phase runs within a countdown threshold (the threshold can be set for 5-15 seconds in combination with the actual situation of the intersection, and is usually set for 9 seconds); if yes, the traffic signal controller delays to process the pedestrian crossing request, the pedestrian is prompted to wait through the pedestrian prompting module, corresponding pedestrian phase light color and release time are output according to pedestrian state information when the pedestrian phase is operated in the next period to respond to the crossing request, and pedestrians pass in the pedestrian phase release stage until the pedestrian phase is finished; otherwise, executing step 4);
3) the traffic signal controller judges whether the pedestrian crosses the street or not; if so, the pedestrian waits for the pedestrian phase release stage to pass until the pedestrian phase is finished; otherwise, the traffic signal controller outputs corresponding pedestrian phase light color and release time according to the pedestrian state information, and the pedestrian passes when waiting to the pedestrian phase release stage until the pedestrian phase is finished;
4) the traffic signal controller judges whether the pedestrian crosses the street or not; if the pedestrian crossing is triggered and the pedestrian clearance time is less than the maximum passing time, the traffic signal controller adjusts the pedestrian crossing clearance time according to the pedestrian state information to ensure that the pedestrian safely passes the street, and the pedestrian passes in the pedestrian phase clearance stage until the pedestrian phase is finished; if the pedestrian passing time is larger than the maximum passing time when the pedestrian crossing is triggered, the pedestrian phase is ended; if the pedestrian crossing the street is not triggered, executing the step 5);
5) the traffic signal control machine detects whether a pedestrian track exists on the pedestrian crossing; if the pedestrian passing time reaches a certain time threshold (the threshold can be set by combining the actual conditions of the intersection and is usually set as 2/3 of the pedestrian passing time), the pedestrian still does not pass through the middle position of the zebra crossing, the traffic signal controller prolongs the pedestrian passing time and does not exceed the maximum passing time of the pedestrian, and the pedestrian prompting module prompts the pedestrian to pass as soon as possible until the pedestrian phase is finished; otherwise, the traffic signal controller adjusts the pedestrian passing time to be the minimum passing time, and the pedestrian prompting module prompts the pedestrian to stand outside the waiting area for waiting;
6) and (3) after the traffic signal controller detects that the pedestrian phase is finished, the motor vehicle phase enters a release stage, the pedestrian crossing is a red light, and the step 1) is executed.
The specific intersection arrangement in the present example is shown in fig. 3.
The signal center system and the traffic signal controller carry out data interaction. On one hand, the signal center system analyzes data provided by the rear-end detector and sends an analyzed pedestrian detection result to the traffic signal controller; and on the other hand, the signal center system analyzes the pedestrian crossing processing result reported by the traffic signal controller, and evaluates the accuracy and reliability of the whole control system. In addition, the signal center system can send degradation processing instructions to the traffic signal controller in severe weather so as to ensure that the control system can operate reliably and stably.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a be applied to non-contact pedestrian crossing street control system at crossing which characterized in that includes: the system comprises a front-end detector, a rear-end detector, a traffic signal controller, a pedestrian prompting module, a signal center system, a signal lamp and a countdown timer;
the front-end detector adopts a pedestrian detector erected beside a pedestrian crossing line, collects pedestrian state information in real time and sends a detection result to the traffic signal controller;
the rear-end detector adopts a road surface monitoring probe erected at the intersection and sends monitoring video data acquired in real time to the signal center system;
the signal center system analyzes the received monitoring video data to obtain a pedestrian detection result and sends the pedestrian detection result to the traffic signal controller;
the traffic signal controller judges the received pedestrian detection result, adjusts and outputs the signal lamp and countdown of the corresponding intersection again when the pedestrian needs to cross the street, and sends the execution result to the signal center system;
the pedestrian prompting module is used for carrying out safety early warning on pedestrians crossing the street;
and the signal lamp and the countdown display the corresponding color and the remaining time of the traffic signal lamp in a countdown per second mode and are used for prompting the remaining passing time of the pedestrians crossing the street.
2. The non-contact pedestrian crossing control system applied to the intersection according to claim 1, wherein the traffic signal controller adopts multiple control modes of single-point optimization, single-point induction and non-contact pedestrian crossing, and adjustment of pedestrian clearance time under the condition of different flow rates is achieved.
3. The non-contact pedestrian street crossing control system applied to the intersection according to claim 1, characterized in that when the pedestrian prompting module detects that a pedestrian is not waiting in the waiting area, the pedestrian prompting module displays 'please wait in the waiting area', and voice broadcasts a prompt; and if the pedestrian waiting for crossing the street in the waiting area is detected and the pedestrian stays in the waiting area but does not cross the street, displaying 'please wait outside the waiting area', and voice broadcasting for reminding.
4. The non-contact pedestrian crossing control system applied to an intersection according to claim 1, wherein the front end detector acquires a detection area image by using a camera unit.
5. The non-contact pedestrian crossing control system applied to the intersection according to claim 4, wherein the front end detector processes the acquired image, extracts characteristic information, and identifies and tracks pedestrians in the detection area as targets to obtain a pedestrian detection result.
6. A working method of a non-contact pedestrian crossing control system applied to an intersection is based on any one of the systems in claims 1-5, and is characterized by comprising the following steps:
1) the traffic signal control machine detects whether a pedestrian crossing request exists; if not, the motor vehicle phase enters a release stage, and the pedestrian crossing the street is a red light; if yes, judging whether the traffic signal controller operates in a pedestrian phase, if yes, executing the step 2), otherwise, prompting pedestrians to wait through a pedestrian prompting module and executing the step 3);
2) the traffic signal controller judges whether the pedestrian phase runs within a countdown threshold value or not; if yes, the traffic signal controller delays to process the pedestrian crossing request, the pedestrian is prompted to wait through the pedestrian prompting module, corresponding pedestrian phase light color and release time are output according to pedestrian state information when the pedestrian phase is operated in the next period to respond to the crossing request, and pedestrians pass in the pedestrian phase release stage until the pedestrian phase is finished; otherwise, executing step 4);
3) the traffic signal controller judges whether the pedestrian crosses the street or not; if so, the pedestrian waits for the pedestrian phase release stage to pass until the pedestrian phase is finished; otherwise, the traffic signal controller outputs corresponding pedestrian phase light color and release time according to the pedestrian state information, and the pedestrian passes when waiting to the pedestrian phase release stage until the pedestrian phase is finished;
4) the traffic signal controller judges whether the pedestrian crosses the street or not; if the pedestrian crossing is triggered and the pedestrian clearance time is less than the maximum passing time, the traffic signal controller adjusts the pedestrian crossing clearance time according to the pedestrian state information to ensure that the pedestrian safely passes the street, and the pedestrian passes in the pedestrian phase clearance stage until the pedestrian phase is finished; if the pedestrian passing time is larger than the maximum passing time when the pedestrian crossing is triggered, the pedestrian phase is ended; if the pedestrian crossing the street is not triggered, executing the step 5);
5) the traffic signal control machine detects whether a pedestrian track exists on the pedestrian crossing; if the pedestrian passes through the middle position of the zebra crossing when the pedestrian passing time runs to a certain time threshold, the traffic signal controller prolongs the pedestrian passing time and does not exceed the maximum pedestrian passing time, and the pedestrian prompting module prompts the pedestrian to pass as soon as possible until the pedestrian phase is finished; otherwise, the traffic signal controller adjusts the pedestrian passing time to be the minimum passing time, and the pedestrian prompting module prompts the pedestrian to stand outside the waiting area for waiting;
6) and (3) after the traffic signal controller detects that the pedestrian phase is finished, the motor vehicle phase enters a release stage, the pedestrian crossing is a red light, and the step 1) is executed.
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Application publication date: 20210223 |