TRAFFIC SIGNAL CONTROL METHOD AND SYSTEM

Abstract

Disclosed are a traffic signal control method and system, relating to the technical field of traffic signal control. The method includes: detecting speeds of vehicles, calculating a vehicle arriving at the intersection first, and taking a road where the vehicle is located as a target road; detecting whether there is a pedestrian on a crosswalk perpendicular to the target road; if there is no pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when. the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection; and if there is a pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection after waiting for the passage of the pedestrian.

Description

I TRAFFIC SIGNAL CONTROL METHOD AND SYSTEM TECHNICAL FIELD [OI] The present application relates to the technical field. of traffic signal control, and. particularly to a traffic signal control method and system. BACKGROUND ART

[02] In the related art, traffic lights are all mechanically provided and cannot be adjusted according to specific traffic conditions. For example, in the evening or in areas with few residents, even if there are no vehicles driving in the other three directions, a truck that arrives at a redlight intersection has to stop for 3 minutes to wait for the traffic light to turn green, resulting in wasted time. SUMMARY

[03] It is an object of the present application to provide a traffic signal control method and system, which may improve traffic operation efficiency and. ensure driving safety.

[04] In order to achieve the abovementioned object, the present application provides the following solutions.

[05] In a first aspect, the present application provides a. traffic signal control :method. for controlling' traffic signals at an intersection, the traffic signals including red, green, and yellow, where the traffic signal control method includes: [O6] detecting speeds of vehicles, calculating a vehicle arriving at the intersection first, and taking a road where the vehicle arriving at the intersection first is located as a target road;

[07] detecting whether there is a pedestrian on a crosswalk perpendicular to the target road;

[08] if there is no pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection; and

[09] if there is a pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection after waiting for the passage of the pedestrian.

[10] In a second aspect, the present application provides a traffic signal control system, configured. to control traffic signals at an intersection, the traffic signals including red, green, and yellow, where the traffic signal control system includes:

[11] a speed detection module, configured to detect speeds of vehicles, calculate a vehicle arriving at the intersection first, and take a road where the vehicle arriving at the intersection first is located as a target road;

[12] a pedestrian detection module, configured to detect whether there is a pedestrian on a crosswalk perpendicular to the target road;

[13] a first control module, configured to, when there is no pedestrian on the crosswalk perpendicular to the target road, adjust the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection; and

[14] a second control module, configured to, when there is a pedestrian on the crosswalk perpendicular to the target road, adjust the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection after waiting for the passage of the pedestrian.

[15] According to specific embodiments provided by the present application, the present application discloses the following technical effects.

[16] According to the traffic signal control method and system provided by the present application, the vehicle arriving at the intersection first is calculated by detecting the speed of each vehicle, and the road where the vehicle arriving at the intersection first is located is taken as the target road. The traffic signal at the intersection is adjusted by taking the target road as a reference and combining pedestrian passage conditions and traffic conditions so that the vehicles on the target road quickly pass through the traffic intersection, thereby achieving the purposes of saving time and ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[17] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the related art, the drawings required in the descriptions of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and a person skilled in the art may obtain other drawings according to these drawings without involving any inventive effort.

[18] FIG. 1 is a flowchart of a traffic signal control method according to an embodiment of the present application; and

[19] FIG. 2 is a structural diagram of a traffic signal control system according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[20] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described. embodiments are only some embodiments of the present application, not all embodiments. Based. on the embodiments of the present application, all other embodiments obtained by a person skilled in the art without inventive effort fall within the scope of the present application.

[21] The present application. provides a 'traffic signal control method and system. A. vehicle arriving at an intersection first is calculated by detecting the speed of each vehicle, and a road where the vehicle arriving at the intersection first is located is taken as a target road. The traffic signal at the intersection is adjusted by taking the target road as a reference and combining pedestrian passage conditions and traffic conditions so that the vehicles on the target road quickly pass through the traffic intersection, thereby achieving the purposes of saving time and ensuring driving safety. In order to describe the present application in detail so as to support the technical problem. to be solved by the present application, the embodiments of the present application. are described. in further detail below.

[22] Embodiment 1:

[23] As shown in FIG. 1, the embodiment of the present application provides a traffic signal control method for controlling traffic signals at an intersection, and. the traffic signals include red, green, and yellow. The method includes: S1, detecting speeds of vehicles, calculating a vehicle arriving at the intersection first, and taking a road where the vehicle arriving at the intersection first is located as a target road; S2, detecting whether there is a pedestrian on a crosswalk perpendicular to the target road; S3, if there is no pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection; and S4, if there is a pedestrian on the crosswalk perpendicular to the target road, adjusting the traffic signal when. the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection after waiting for the passage of the pedestrian.

[24] Adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection includes: if all of the traffic signals at the current intersection are yellow, adjusting the traffic signals of the target road and a road connected to the target road to be green, and meanwhile, adjusting the traffic signals of roads perpendicular to the target road at 90 degrees to be red; if the traffic signal of the target road is red, and the traffic signals of the roads perpendicular to the target road at 90 degrees are green, detecting whether there is a vehicle at junctions of the roads perpendicular to the target road at 90 degrees; if there is no vehicle at the junctions of the roads perpendicular to the target road at 90 degrees, adjusting the traffic signals of the target road and the road connected to the target road to be green, and adjusting the traffic signals of the roads perpendicular to the target road at 90 degrees to be red; and if there is a vehicle at the junctions of the roads perpendicular to the target road at 90 degrees, after waiting for the passage of the vehicle, adjusting the traffic signals of the target road and the road connected to the target road to be green, and adjusting the traffic signals of the roads perpendicular to the target road at 90 degrees to be red.

[25] In this embodiment, the traffic signals at the intersection are adjusted so that the vehicle arriving at the traffic intersection first can quickly pass through the intersection, thereby greatly improving traffic operation efficiency and relieving the local traffic pressure. It should be noted that this embodiment is implemented when there are few vehicles or pedestrians at the traffic intersection.

[26] This embodiment proposes a specific way for detecting the speeds of the vehicles, including: presetting a speed measurement point on a road leading to the intersection, setting speed. measurement points at equivalent distance positions of four roads of the intersection, and measuring the speeds of the vehicles according to the speed measurement points.

[27] This embodiment proposes a specific way for measuring the vehicle arriving at the intersection first, including: comparing the speeds of the vehicles converged at the intersection, and determining the vehicle arriving at the intersection first according to the speeds of the vehicles per hour.

[28] This embodiment proposes a specific way for detecting vehicles, including: detecting the speed of a moving object, and if the speed of the moving object is lower than a preset speed threshold value, determining that the moving object is not a vehicle.

[29] This embodiment proposes a specific way for detecting whether there is a pedestrian on the crosswalk perpendicular to the target road, including: taking photographs of the crosswalk perpendicular to the target road every set time intervals, and detecting whether there is a pedestrian on the crosswalk according to the photographs using a target detection algorithm.

[30] This embodiment proposes a specific way for detecting whether there is a vehicle at junctions of the roads perpendicular to the target road at 90 degrees, including: taking photographs of the junctions of the roads perpendicular to the target road at 90 degrees every set time intervals, and detecting whether there is a vehicle at the junctions of the roads according to the photographs using a target detection algorithm.

[31] Embodiment 2:

[32] As shown in FIG. 2, the embodiment of the present application provides a traffic signal control system, configured to control traffic signals at an intersection, and the traffic signals include red, green, and yellow. The traffic signal control system includes: a speed detection module 100, configured to detect speeds of vehicles, calculate a vehicle arriving at the intersection first, and take a road where the vehicle arriving at the intersection first is located as a target road; a pedestrian detection module 200, configured to detect whether there is a pedestrian on a crosswalk perpendicular to the target road; a first control module 300, configured to, when there is no pedestrian on the crosswalk perpendicular to the target road, adjust the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection; and a second control module 400, configured to, when there is a pedestrian on the crosswalk perpendicular to the target road, adjust the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection after waiting for the passage of the pedestrian.

[33] Adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection includes: if all of the traffic signals at the current intersection are yellow, adjusting the traffic signals of the target road and a road connected to the target road to be green, and meanwhile, adjusting the traffic signals of roads perpendicular to the target road at 90 degrees to be red; if the traffic signal of the target road is red, and the traffic signals of the roads perpendicular to the target road at 90 degrees are green, detecting whether there is a vehicle at junctions of the roads perpendicular to the target road at 90 degrees; if there is no vehicle at the junctions of the roads perpendicular to the target road at 90 degrees, adjusting the traffic signals of the target road and the road connected to the target road to be green, and adjusting the traffic signals of the roads perpendicular to the target road at 90 degrees to be red; and if there is a vehicle at the junctions of the roads perpendicular to the target road at 90 degrees, after waiting for the passage of the vehicle, adjusting the traffic signals of the target road and the road connected to the target road to be green, and adjusting the traffic signals of the roads perpendicular to the target road at 90 degrees to be red.

[34] In this embodiment, the speed detection module is a laser radar velocimeter, and the laser radar velocimeter is configured to detect the speeds of the vehicles, calculate the vehicle arriving at the intersection first, and take the road where the vehicle arriving at the intersection first is located as the target road.

[35] Further, the laser radar velocimeter is also configured to detect the speed of a moving object, and if the speed of the moving object is lower than a preset speed threshold value, determine that the moving object is not a vehicle. If it is determined that the moving object is not a vehicle, the program of calculating the vehicle arriving at the intersection first is not performed.

[36] The technical features of the above embodiments may be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features of the abovementioned embodiments are described. However, as long as there is no contradiction between the combinations of these technical features, they should be considered to be within the scope of this specification.

[37] Specific examples are applied herein to illustrate the principles and implementations of the present application, and the above illustrations of the embodiments are only used to help understand the method of the present application and its core ideas. Meanwhile, for a person skilled in the art, according to the ideas of the present application, there will be changes in the specific implementations and the scope of application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A traffic signal control method for the Sending traffic signals at an intersection, where the traffic signals include red, green and yellow, where the traffic signal control method comprises: detecting vehicle speeds, the calculation signs of a vehicle that arrives first at the cross point, and taking it as a destination road from a road where it vehicle that arrives first at the intersection finds; detecting whether there is a pedestrian at a crossing position perpendicular to the goal path; when there is no pedestrian at the crossing perpendicular to the target road, adjusting the traffic signal when the vehicle arrives at the intersection on the destination road according to traffic signals and traffic conditions at the current intersection; and when there is a pedestrian on the crossing perpendicular on the target road, adjusting the traffic signal when the vehicle on the target road arrives at the intersection according to traffic signals and traffic conditions at the current intersection point after waiting for the pedestrian to pass.

2. A traffic signal control system, configured for controlling traffic signals at an intersection, where the traffic signals include red, green and yellow, where the traffic signal control system comprises: a speed detection module, configured for the detecting vehicle speeds, calculating a vehicle that arrives first at an intersection, and it as to take a destination road from a road where the vehicle that is first arrives at the intersection where is located; a pedestrian detection module, configured for the detect if there is a pedestrian at a crossing perpendicular to the goal path; a first control module, configured for, when when there is no pedestrian on the crossing perpendicular to the destination road, adjusting the traffic signal when the vehicle cx) arrives at the destination road, you can reach the intersection according to traffic signals and traffic conditions at the current intersection point; and a second control module, configured for, when whenever there is a pedestrian on the crossing perpendicular to the destination road, adjusting the traffic signal when the vehicle cx) arrives at the destination road, you can reach the intersection according to traffic signals and traffic conditions at the current intersection point after waiting for the pedestrian to pass. 000 FIG.1 FIG.2 PORT CONCERNING RESEARCH INTO THE STATE OF THE ART Patent application 2039024 1 1 classification of the subject : Investigated areas of technology : G1 / 095 G08G PC files: Scope of the investigation: E Fully um of the investigated conclusions: Uninvestigated conclusions: November 2024 - Relevant literature 2 Citation of literature with indication, where necessary, of relevance to gory conclusion(s) of text passages or figures of particular importance X KR 102624143 B1 (AUTONOMOUS A2Z) January 12, 2024 1, 2 * figure 5; machine translation paragraphs [0016], [0036], [0041]-[0043], [0056]-[0060] * – – – A KR 2018 / 0133624 A (AHN SE CHAN) December 17, 2018 1, 2 * figure 1; machine translation paragraphs [0045]-[0108] * – – – A KR 102263536 B1 (BYDA) June 10, 2021 1, 2 * figure 5; machine translation paragraphs [0063]-[0074] * – – – – – Date on which the investigation was completed: The competent official: March 2025 Dr. I. Stuijt Netherlands Patent Office part of the Netherlands Enterprise Agency See explanation on the next page. direction: welding areas of engineering: defined according to International Patent Classification (IPC). Generosity of the cited literature: p state of T being of particular importance in itself: literature on theory or not published in time the technical principle underlying the invention in conjunction with other cited literature E: patent literature published on or after the filing a state of the art of particular importance date of the present application and of which the submission date or the priority date is before the something of importance belonging to category X or Y submission date of the present application being state of the art D: mentioned in the application referring to an unrecorded state of affairs e technique L: literature mentioned for other reasons literature published between priority and &: member of the same patent family; corresponding literature submission date APPENDIX Accompanying the Report on the State of the Art Survey Patent application 2039024 The appendix contains a list of patent applications or patents published elsewhere (so-called and of the same patent family), which correspond to patent specifications mentioned in the report. The statement has been compiled based on data from the computer file of the European severance agency as of March 6, 2025. The accuracy and completeness of this statement are neither guaranteed by the European Patent Office, nor guaranteed by the Netherlands Patent Office; the data are Provided for informational purposes. In the report mentioned Date of Corresponding Date of patent specification publication of patent specifications publication KR 102624143 B1 12-01-2024 KR 20230043638 A 31-03-2023 KR 20180133624 A 17-12-2018 KR 101988002 B1 11-06-2019 KR 102263536 B1 10-06-2021 (none) WRITTEN OPINION Patent application 2039024 Opening date: Priority date: November 2024 - 1 Applicant: classification of the subject : 8G1 / 095 Jianghan University The written opinion contains an explanation of the following sections: Part I Part II Part III Part IV Part V Part VI Part VII Part VIII The competent official: Dr. I. Stuijt Netherlands Patent Office part of the Netherlands Enterprise Agency Defined according to International Patent Classification (IPC). Written Opinion Patent application 2039024 Part I Basis of the written opinion The written opinion was prepared on the basis of the conclusions submitted on 11 November 2024. Part V Reasoned statement regarding novelty and inventiveness and industrial applicability Declaration Yourself Yes: conclusion(s) - No: conclusion(s) 1, 2 ventivity Yes: conclusion(s) - No: conclusion(s) - Industrial applicability Yes: conclusion(s) 1, 2 No: conclusion(s) - Literature and commentary the report concerning the state of the art study become the following publications names: 1: KR 102624143 B1 (AUTONOMOUS A2Z) January 12, 2024 2: KR 2018 / 0133624 A (AHN SE CHAN) December 17, 2018 3: KR ​​102263536 B1 (BYDA) June 10, 2021 The discussion of documents D1-D3 below uses machine translations. References to and citations from this document are references to and citations from the Machine translation of this document, with the exception of the figures. current D1 discloses a traffic signal control method (“process for controlling traffic lights”, see nea [0041]) for controlling traffic signals at an intersection (“intersection 500”, see figure where the traffic signals (“traffic lights 530, 560”) include red, green and yellow (“stop signal”, "Wiving signal", "yellow signal", see paragraph [0016]), where the traffic signal control method vat: • detecting vehicle speeds, calculating a vehicle that is first arrives at the intersection, and taking it as a destination road from a road where the vehicle that as first arrives at the intersection where it is located (see paragraphs [0056]-[0058]); • detecting whether there is a pedestrian at a crossing perpendicular to the target path (see paragraph [0057]); • when there is no pedestrian on the crossing perpendicular to the destination road, adjusting

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