CN112330957B - Intersection signal lamp control effect analysis system and method - Google Patents
Intersection signal lamp control effect analysis system and method Download PDFInfo
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- CN112330957B CN112330957B CN202011097485.2A CN202011097485A CN112330957B CN 112330957 B CN112330957 B CN 112330957B CN 202011097485 A CN202011097485 A CN 202011097485A CN 112330957 B CN112330957 B CN 112330957B
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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
- G08G1/0125—Traffic data processing
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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
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
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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 embodiment of the invention provides a system and a method for analyzing control effect of a signal lamp at an intersection, wherein the system comprises: the parking time calculation module is used for calculating the maximum parking time of the vehicle in the first direction of the target intersection in the previous signal lamp switching period at the current moment; the tracking detection device is used for detecting the passing states of vehicles and pedestrians in and outside the road junction of the target road junction at the current moment; the signal lamp detection module is used for detecting control signals of signal lamps in all directions of the target intersection; and the signal lamp control effect analysis module is used for judging whether the maximum parking times is less than or equal to a first threshold value or not, and if the maximum parking times is less than or equal to the first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic conditions that the control signal of the target intersection at the current moment is the direction of the green lamp and the control signal is the direction of the red lamp. By implementing the invention, the control effect of the signal lamp can be analyzed in real time, and the analysis result is more accurate.
Description
Technical Field
The invention relates to the technical field of intelligent traffic, in particular to a system and a method for analyzing control effect of a signal lamp at an intersection.
Background
The control of orderly and safe operation of intersections by signal lamps is an indispensable link in urban traffic construction, but sometimes the control parameters of the signal lamps at the current moment cannot meet the traffic requirements of target intersections, such as: when the red light is encountered in the low peak time, the green light is not used for vehicles and pedestrians to pass in the other direction; the number of vehicles in the direction of releasing at peak-leveling time is far less than that of vehicles in the direction of forbidding, so that the time and space resources at the intersection are wasted. It is not possible for a traffic manager to be concerned with the control effect of each intersection at all times. How to enable a manager to accurately and intuitively master the control effect of each signal lamp for controlling the intersection in real time, the optimal distribution of time and space resources at the intersection is realized, the time and the second are necessary, the land is necessary to be seized, and the real-time accurate and visual analysis of the control effect of the signal lamps at the intersection is key.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the control effect of the intersection signal lamp in the prior art cannot be accurately evaluated and analyzed in real time, so as to provide a system and a method for analyzing the control effect of the intersection signal lamp.
The first aspect of the present invention provides a system for analyzing the control effect of a signal lamp at an intersection, comprising: the parking time calculation module is used for calculating the maximum parking time of the vehicle in the first direction of the target intersection in the previous signal lamp switching period at the current moment; the tracking detection device is used for detecting the passing states of vehicles and pedestrians in and outside the road junction of the target road junction at the current moment; the signal lamp detection module is used for detecting control signals of signal lamps in all directions of the target intersection; and the signal lamp control effect analysis module is used for judging whether the maximum parking times is less than or equal to a first threshold value or not, and if the maximum parking times is less than or equal to the first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic conditions that the control signal of the target intersection at the current moment is the direction of the green lamp and the control signal is the direction of the red lamp.
Optionally, the parking number calculation module includes: the parking information judgment submodule is used for judging whether a vehicle is parked and waits outside a stopping line in the first direction of the target intersection in the previous signal lamp switching period; and the parking time determining submodule is used for determining the parking time of the first vehicle outside the stop line in the first direction as the maximum parking time of the vehicle in the first direction of the target intersection if the vehicle outside the stop line waits for parking.
Optionally, the system for analyzing the control effect of the intersection signal lamp provided by the invention further comprises: the vehicle counting module is used for calculating the number of passing vehicles in the direction that the control signals are green light and the number of waiting vehicles in the direction that the control signals are red light in a preset time period if the maximum number of times of stopping vehicles in the first direction of the target intersection in the previous signal lamp switching period is larger than a first threshold value and vehicles or pedestrians pass through the intersection at the current moment; the signal lamp control effect analysis module is also used for analyzing the signal lamp control effect of the target intersection according to the number of the vehicles passing through in the direction that the control signals are green lamps and the number of the vehicles waiting in the direction that the control signals are red lamps.
Optionally, the system for analyzing the control effect of the intersection signal lamp provided by the invention further comprises: the system comprises an idle time length calculation module and a waiting target detection module, wherein if the maximum parking times of vehicles in a first direction of a target intersection in the previous signal lamp switching period are larger than a first threshold value and no vehicle or pedestrian passes through the intersection at the current moment, the idle time length calculation module is used for calculating the continuous time length of no vehicle or pedestrian passing through the intersection; if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold, the waiting target detection module is used for detecting whether a vehicle or a pedestrian waits outside the stopping line of the target intersection; if the duration of no vehicle or pedestrian passing in the intersection is greater than the second threshold value and vehicles or pedestrians wait outside the stop line of the target intersection, the signal lamp control effect analysis module is further used for analyzing the signal lamp control effect of the target intersection according to the number of the waiting vehicles and pedestrians; and if the duration of no vehicle or pedestrian passing in the intersection is greater than the second threshold and no vehicle or pedestrian waits outside the stop line of the target intersection, or the duration of no vehicle or pedestrian passing in the intersection is less than or equal to the second threshold, triggering a vehicle counting module.
Optionally, the system for analyzing the control effect of the intersection signal lamp provided by the invention further comprises: the time judgment module is used for judging whether a control effect analysis result exists in a signal lamp switching period of the current time or not; and if the signal lamp switching period at the current moment has a control effect analysis result, triggering the tracking detection device.
Optionally, the system for analyzing the control effect of the intersection signal lamp provided by the invention further comprises: and the parking information storage module is used for acquiring and storing the vehicle information of all vehicles waiting outside the stop line in the first direction if the control signal in the first direction at the current moment is a red light.
The second aspect of the invention provides a method for analyzing the control effect of a crossing signal lamp, which comprises the following steps: calculating the maximum parking times of the vehicle in the first direction of the target intersection in the previous signal lamp switching period at the current moment; detecting the traffic states of vehicles and pedestrians in and outside a road junction of a target road junction at the current moment; detecting control signals of signal lamps in all directions of a target intersection; and if the maximum parking times of the vehicles in the first direction of the target intersection are less than or equal to a first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic condition that the control signal of the target intersection at the current moment is the direction of the green light and the control signal of the red light.
Optionally, the step of calculating the maximum number of times of stopping the vehicle in the first direction at the target intersection in the previous signal lamp switching period at the current time includes: judging whether a vehicle is parked and waits outside a stopping line in the first direction of the target intersection in the previous signal lamp switching period; and if the vehicles outside the stopping line have the parking waiting, determining the number of parking times of the first vehicle outside the stopping line in the first direction as the maximum number of parking times of the vehicle in the first direction of the target intersection.
Optionally, in the method for analyzing the control effect of the intersection signal lamp provided by the embodiment of the present invention, if the maximum number of times of stopping the vehicle at the first direction of the target intersection in the previous signal lamp switching period is greater than the first threshold, it is detected whether a vehicle or a pedestrian passes through the intersection of the target intersection at the current moment; if vehicles or pedestrians pass through the intersection at the current moment, calculating the number of the vehicles passing through the intersection in the direction that the control signal is green light and the number of the vehicles waiting in the direction that the control signal is red light within a preset time period; and analyzing the signal lamp control effect of the target intersection according to the number of the vehicles passing in the direction of the green light of the control signal and the number of the vehicles waiting in the direction of the red light of the control signal.
Optionally, in the method for analyzing the control effect of the intersection signal lamp provided by the embodiment of the present invention, if no vehicle or pedestrian passes through the intersection at the current moment, it is determined whether the duration of the passage of no vehicle or pedestrian at the intersection is greater than a second threshold; if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold value, detecting whether a vehicle or a pedestrian waits outside a stopping line of the target intersection; and if vehicles or pedestrians wait outside the stop line, analyzing the signal lamp control effect of the target intersection according to the number of the waiting vehicles and pedestrians.
Optionally, in the method for analyzing control effect of intersection signal lamps provided in the embodiment of the present invention, if the duration of no vehicle or pedestrian passing through the intersection is less than or equal to the second threshold, or no vehicle or pedestrian waiting outside the stop line, the step of calculating the number of vehicles passing through in the direction that the control signal is green light and the number of vehicles waiting in the direction that the control signal is red and the like in the preset time period is performed.
Optionally, in the method for analyzing control effect of intersection signal lamps provided in the embodiment of the present invention, the method further includes: judging whether a control effect analysis result exists in a signal lamp switching period of the current moment; and if the signal lamp switching period at the current moment has a control effect analysis result, returning to the step of detecting the passing states of the vehicles and the pedestrians in the road mouth and outside the road mouth of the target road junction at the current moment.
Optionally, in the method for analyzing control effect of intersection signal lamps provided in the embodiment of the present invention, the method further includes: judging whether the control signal in the first direction at the current moment is a red light or not; and if the control signal in the first direction is a red light, acquiring and storing the vehicle information of all vehicles waiting outside the stop line in the first direction.
A third aspect of the present invention provides a computer apparatus comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to perform the intersection signal light control effect analysis method as provided by the second aspect of the present invention.
A third aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions for causing a computer to execute the intersection signal lamp control effect analysis method according to the second aspect of the present invention.
The technical scheme of the invention has the following advantages:
1. the invention provides an intersection signal lamp control effect analysis system which comprises a parking time calculation module, a tracking detection device, a signal lamp detection module and a signal lamp control effect analysis module, wherein the parking time calculation module is used for acquiring the maximum parking time in the first direction of a target intersection in the previous signal lamp switching period at the current moment, and when the maximum parking time is less than or equal to a first threshold value, the signal lamp control effect analysis module is used for analyzing the control effect of the current moment of a signal lamp according to the traffic condition that the control signal of the target intersection at the current moment is the direction of a green lamp and the control signal is the direction of a red lamp. The signal lamp control effect analysis system provided by the invention can be used for detecting the signal lamp control effect of the target intersection in real time, and the number of times of parking at the intersection can most directly reflect whether the target intersection passes smoothly, so that the control effect of the signal lamp is intuitively reflected, and the signal lamp control effect analysis system provided by the invention is used for analyzing the signal lamp control effect to obtain an analysis result of the signal lamp control effect more accurately
2. The intersection signal lamp control effect analysis system provided by the invention also comprises a time judgment module which is used for judging whether a control effect analysis result exists in a signal lamp switching period at the current time, if so, the maximum parking times in the last signal lamp switching period are known, calculation is not needed again, the control effect of the signal lamp at the current time can be analyzed directly according to the traffic condition that the control signal of a target intersection is in the green lamp direction and the control signal is in the red lamp direction, and the analysis speed of the signal lamp control effect is accelerated.
3. The intersection signal lamp control effect analysis system provided by the invention further comprises a parking information storage module, and if the control signal in the first direction at the current moment is a red lamp, the parking information storage module is used for acquiring and storing the vehicle information of all vehicles waiting outside the stopping line in the first direction, so that the maximum parking times in the first direction can be conveniently calculated subsequently.
4. The method for analyzing the control effect of the signal lamp at the intersection comprises the steps of firstly obtaining the maximum parking times in the first direction of the target intersection in the previous signal lamp switching period at the current moment, and analyzing the control effect of the signal lamp at the current moment according to the traffic condition that the control signal of the target intersection at the current moment is the green light direction and the control signal of the target intersection at the red light direction when the maximum parking times are smaller than or equal to a first threshold value. The signal lamp control effect analysis method provided by the invention can be used for detecting the signal lamp control effect of the target intersection in real time, and the number of times of parking at the intersection can most directly reflect whether the target intersection is smooth to pass, so that the control effect of the signal lamp is intuitively reflected.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1-4 are flowcharts showing a specific example of a method for analyzing the control effect of intersection signal lamps in the embodiment of the present invention;
fig. 5-10 are schematic block diagrams of specific examples of an intersection signal light control effect analysis system in an embodiment of the present invention;
FIG. 11 is a functional block diagram of a computer device provided in an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
In order to improve crossing traffic efficiency and prevent accidents, most crossings control orderly traffic of vehicles through signal lamps, but sometimes the control parameters of the signal lamps cannot adapt to the traffic state of a target crossing, such as: when the red light is encountered in the low peak time, the green light is not used for vehicles and pedestrians to pass in the other direction; the number of vehicles in the direction of releasing at peak-leveling time is far less than the number of vehicles in the direction of forbidding to stop and wait, so that the time and space resources at the intersection are wasted. In order to realize the optimal distribution of crossing space-time resources, the real-time accurate visual analysis of crossing signal lamp control effect is key.
The embodiment of the invention provides a method for analyzing the control effect of a signal lamp at a road junction, which comprises the following steps of:
step S10: and calculating the maximum parking times of the vehicles in the first direction of the target intersection in the last signal lamp switching period at the current moment. In the embodiment of the present invention, the period from the green light on time to the next green light on time is referred to as a traffic light switching period.
Step S20: the traffic states of vehicles and pedestrians in and outside the road junction of the target road junction at the current moment are detected, in the embodiment of the invention, the inside of the road junction of the target road junction is a part surrounded by extension and intersection of the stop line in each direction of the target road junction, and the outside of the road junction is a part extending behind the stop line.
Step S30: the control signals of the signal lamps in each direction of the target intersection are detected, and because the current time is a random time, when the target intersection is analyzed, the control signals in the first direction may be red lamps or green lamps, and therefore the control signals in each direction need to be detected first.
Step S40: it is determined whether a maximum number of stops of the vehicle in a first direction at the target intersection is less than or equal to a first threshold. Therefore, when analyzing the signal lamp control effect of the target intersection, the intersection signal lamp control effect analysis method provided by the embodiment of the invention first determines whether the maximum number of times of stopping in the first direction of the target intersection is less than or equal to a first threshold, and the value of the first threshold can be adjusted according to actual requirements, for example, for an intersection with a large traffic flow, the first threshold can be set to a large value, and for an intersection with a small traffic flow, the first threshold can be set to a small value.
If the maximum number of times of stopping the vehicle in the first direction of the target intersection is less than or equal to the first threshold, step S41 is executed.
Step S41: and analyzing the control effect of the signal lamp at the current moment according to the traffic condition that the control signal of the target intersection at the current moment is in the direction of green light and the control signal is in the direction of red light. In the embodiment of the invention, if the current time control signal is that no motor vehicle, no motor vehicle and no pedestrian pass in the direction of the green light, or the current time control signal is that no motor vehicle, no motor vehicle and no pedestrian wait in the direction of the green light, and the control signal is that the direction of the red light does not have the motor vehicle, no motor vehicle and no pedestrian wait, the control effect of the signal lamp at the current time is determined to be 'good', and if the current time control signal is that the green light does not pass, but the control signal is that the direction of the red light has the motor vehicle, no motor vehicle and no pedestrian wait, the control effect of the signal lamp at the current time is determined to be 'poor'.
The method for analyzing the control effect of the signal lamp at the intersection, provided by the embodiment of the invention, comprises the steps of firstly obtaining the maximum parking times in the first direction of the target intersection in the previous signal lamp switching period at the current moment, and when the maximum parking times are less than or equal to the first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic conditions that the control signal of the target intersection at the current moment is the green light direction and the control signal is the red light direction. The signal lamp control effect analysis method provided by the invention can be used for detecting the signal lamp control effect of the target intersection in real time, and the number of times of parking at the intersection can most directly reflect whether the target intersection is smooth to pass, so that the control effect of the signal lamp is intuitively reflected.
In an alternative embodiment, as shown in fig. 1, in the analysis method for signal lamp control effect according to the embodiment of the present invention, in the step S40, if it is determined that the maximum number of times of stopping the vehicle at the first direction of the target intersection is greater than the first threshold, the step S50 is executed.
Step S50: whether vehicles or pedestrians pass through the intersection of the target intersection at the current moment is detected, namely whether motor vehicles, non-motor vehicles or pedestrians pass through the direction of the green light of the control signal is detected. If the vehicle or the pedestrian passes through the road at the present moment, step S51 and step S52 are executed.
Step S51: the number of vehicles passing through in the direction that the control signal is the green light and the number of vehicles waiting in the direction that the control signal is the red light in the preset time period are calculated, and the preset time period can be adjusted according to actual requirements.
Step S52: and analyzing the signal lamp control effect of the target intersection according to the number of the vehicles passing in the direction of the green light of the control signal and the number of the vehicles waiting in the direction of the red light of the control signal. Illustratively, the control effect of the traffic lights in the preset time period is evaluated as "good" when the number of vehicles passing in the direction in which the control signal is green is equal to the number of vehicles waiting in the direction in which the control signal is red, the control effect of the traffic lights in the preset time period is evaluated as "good" when the number of vehicles passing in the direction in which the control signal is green is greater than the number of vehicles waiting in the direction in which the control signal is red, and the control effect of the traffic lights in the preset time period is evaluated as "poor" when the number of vehicles passing in the direction in which the control signal is green is less than the number of vehicles waiting in the direction in which the control signal is red.
The maximum number of times of parking in the first direction is greater than the first threshold, which may be caused by unreasonable setting of the control signal of the signal lamp, or may be caused by a large traffic flow, so after it is determined that the maximum number of times of parking is greater than the first threshold, by comparing the number of passing vehicles in the direction in which the control signal is the green light with the number of waiting vehicles in the direction in which the control signal is the red light, analysis of the control effect of the signal lamp is completed, and the problem of inaccurate analysis result due to careless consideration is avoided.
In an alternative embodiment, as shown in fig. 1, in the method for analyzing a signal lamp control effect according to the embodiment of the present invention, in the step S50, if it is determined that no vehicle or pedestrian passes through the intersection of the target intersection at the current time, the following steps are performed:
step S60: judging whether the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold, and if the duration of no vehicle or pedestrian passing in the intersection is less than or equal to the second threshold, executing the steps S51 and S52; if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold value, executing the following steps:
step S70: and detecting whether a vehicle or a pedestrian waits outside the stop line of the target intersection, and if no vehicle or pedestrian waits, executing the steps S51 and S52. If there is a vehicle or a pedestrian waiting, step S71 is executed.
Step S71: and analyzing the signal lamp control effect of the target intersection according to the number of waiting vehicles and pedestrians. In a specific embodiment, a third threshold value may be set for the number of waiting vehicles and pedestrians, and when the duration of time during which no vehicle or pedestrian passes in the road is greater than the second threshold value and the number of vehicles and pedestrians waiting outside the stop line is greater than the third threshold value, it is determined that the control effect of the traffic light at that time is "poor".
Whether vehicles or pedestrians pass in the intersection or not reflects the utilization rate of the intersection, and the control effect of the signal lamp is analyzed by combining the utilization rate of the intersection and the information of waiting vehicles and pedestrians in the embodiment of the invention.
In an alternative embodiment, as shown in fig. 2, the step S10 specifically includes:
step S10: and judging whether a vehicle is parked and waited outside the stop line in the first direction of the target intersection in the previous signal lamp switching period, namely judging whether the vehicle is parked and waited outside the stop line in the first direction when the control signal in the first direction is a red light in the previous signal lamp switching period. If there is a vehicle parking wait outside the stop line, step S12 is executed, and if there is no vehicle parking wait outside the stop line, step S13 is executed.
Step S12: the number of times of parking in the first direction of the first vehicle outside the stop line is determined as the maximum number of times of parking of the vehicle in the first direction at the target intersection. The number of stops in the first direction of the first vehicle outside the stopping line refers to the number of red lights encountered by the vehicle before passing through the target intersection.
Step S13: and determining the maximum parking times in the first direction in the last signal lamp switching period as 0.
In an alternative embodiment, in the method for analyzing control effects of intersection signal lamps according to the embodiment of the present invention, as shown in fig. 3, the method further includes:
step S80: and judging whether a control effect analysis result exists in the signal lamp switching period of the current moment. If there is a control effect analysis result in the signal lamp switching period of the current time, step S20 is executed.
In the embodiment of the invention, the analysis of the control effect of the signal lamp at the current moment is based on the analysis of the maximum number of times of stopping the vehicle in the first direction at the target intersection in the previous signal lamp switching period at the current moment, so if no control effect analysis result exists in the period of the current moment, the maximum number of times of stopping the vehicle in the first direction in the previous signal lamp switching period needs to be calculated before the analysis of the control effect of the signal lamp is carried out, but if the control effect of the signal lamp in the period of the current moment is analyzed, the maximum number of times of stopping the vehicle in the first direction in the previous signal lamp switching period needs to be calculated before the analysis, the maximum number of times of stopping the vehicle in the first direction in the previous signal lamp switching period can be directly obtained from the obtained analysis result, thereby shortening the time required for analysis.
However, in order to directly obtain the maximum number of times of stopping in the first direction in the previous signal lamp switching period according to the existing analysis result in the period of the current time, the analysis result and the corresponding maximum number of times of stopping need to be stored after each analysis.
In an alternative embodiment, as shown in fig. 4, the method for analyzing a control effect of a signal lamp provided in the embodiment of the present invention further includes:
step S90: and judging whether the control signal in the first direction at the current moment is a red light, and if the control signal in the first direction is the red light, executing the step S100.
Step S100: vehicle information of all vehicles waiting outside the stop line in the first direction is acquired and stored. As can be seen from steps S11, S12, and S13, when the maximum number of times of stopping in the first direction in the previous traffic light switching cycle at the current time is acquired, it is necessary to know the number of times of stopping of the first vehicle outside the stop line in the first direction in the previous traffic light switching cycle. In the embodiment of the invention, when the parking times of the vehicle are acquired, the ID is marked on each motor vehicle outside the parking line, and real-time tracking detection is carried out. When the green light in the first direction is turned on for the first time, tracking the motor vehicles in the stop state at the current moment, adding 1 to the stop times of each motor vehicle after the stop line, and forming a set B by all the motor vehicles in the stop state and storing the set B; when the green light in the first direction is turned on again, tracking each motor vehicle marked with the ID and in the stopping state after the stop line at the current moment, forming a set A by all the motor vehicles in the stopping state, performing intersection operation on each motor vehicle after the stop line and each motor vehicle stored in the previous period, wherein C is A and B, the set C comprises the motor vehicles which do not pass through the stop line in the previous period, adding 1 to the parking times of the motor vehicles in the set C stored when the green light is turned on for the last time, D is A-C, parking the motor vehicles in the set D for the first time, recording the parking times of the motor vehicles in the set C as 1, and storing the parking times of the motor vehicles in the set C and D in cycles. By implementing the method, the parking times of the first vehicle outside the parking line in the first direction can be obtained, so that the maximum parking times of the vehicle in the first direction can be obtained.
In an optional embodiment, by implementing the intersection signal lamp control effect analysis method of the embodiment of the invention, signal lamp control effects of a target intersection at multiple moments can be obtained, and analysis results of the control effects are divided into three types of "good", "good" and "bad", and within a period of time, when the result is that there are more "bad" moments, a warning message can be sent to related personnel to inform the related personnel to adjust the signal lamp control mode of the intersection.
Example 2
The embodiment of the invention provides a system for analyzing the control effect of a signal lamp at an intersection, as shown in fig. 5, comprising:
the parking number calculating module 10 is configured to calculate the maximum parking number of the vehicle in the first direction at the target intersection in the previous signal switching period at the current time, and the detailed description is described in the above embodiment 1 for the step S10.
The tracking detection device 20 is used to detect the traffic state of the vehicles and pedestrians inside and outside the intersection of the target intersection at the current time, and the detailed description is given in the above embodiment 1 to the description of step S20.
The signal light detection module 30 is used to detect control signals of signal lights in each direction of the target intersection, and the detailed description is given in the above embodiment 1 to the description of step S30.
The signal lamp control effect analysis module 40 is configured to determine whether the maximum number of times of parking is less than or equal to a first threshold, and if the maximum number of times of parking is less than or equal to the first threshold, analyze the control effect of the signal lamp at the current time according to the traffic status of the direction in which the control signal of the target intersection is green and the direction in which the control signal is red, which is described in detail in the above embodiment 1 in relation to step S40.
The invention provides an intersection signal lamp control effect analysis system, which comprises a parking time calculation module 10, a tracking detection device 20, a signal lamp detection module 30 and a signal lamp control effect analysis module 40, wherein the maximum parking time in a first direction of a target intersection in a previous signal lamp switching period at the current moment is obtained through the parking time calculation module 10, and when the maximum parking time is less than or equal to a first threshold value, the signal lamp control effect analysis module 40 analyzes the control effect of the signal lamp at the current moment according to the traffic condition that a control signal of the target intersection at the current moment is in a green lamp direction and the control signal is in a red lamp direction. The signal lamp control effect analysis system provided by the invention can be used for detecting the signal lamp control effect of the target intersection in real time, and the number of times of parking at the intersection can most directly reflect whether the target intersection passes smoothly, so that the control effect of the signal lamp is intuitively reflected.
Alternatively, as shown in fig. 6, the parking number calculation module 10 includes: the parking information determination submodule 11 is configured to determine whether there is a vehicle parking wait outside the first-direction stop line at the target intersection in the previous signal switching cycle, and the detailed description is described in the above embodiment 1 for the step S11.
The parking number determination submodule 12 is configured to determine, if there is a vehicle waiting to park outside the parking line, the parking number determination submodule 12 is configured to determine the number of times of parking of the first vehicle outside the parking line in the first direction as the maximum number of times of parking of the vehicle at the first direction of the target intersection, which is described in detail in the above embodiment 1 for the step S12.
In an optional embodiment, as shown in fig. 7, the system for analyzing control effect of intersection signal lamps according to the embodiment of the present invention further includes: if the maximum number of times of stopping the vehicle at the first direction of the target intersection in the previous signal light switching cycle is greater than the first threshold and the vehicle or the pedestrian passes through the intersection at the current moment, the vehicle counting module 50 is configured to calculate the number of vehicles passing through in the direction where the control signal is green light and the number of vehicles waiting in the direction where the control signal is red light in the preset time period, which is described in detail in the above embodiment 1 for step S51.
The signal lamp control effect analysis module 40 is further configured to analyze the signal lamp control effect of the target intersection according to the number of passing vehicles in the direction that the control signal is green and the number of waiting vehicles in the direction that the control signal is red, which is described in detail in the above embodiment 1 for the description of step S52.
In an optional embodiment, as shown in fig. 8, the system for analyzing control effect of intersection signal lamps according to the embodiment of the present invention further includes: an idle duration calculation module 60 and a wait target detection module 70.
If the maximum number of times of stopping the vehicle at the first direction of the target intersection in the previous signal lamp switching period is greater than the first threshold value and no vehicle or pedestrian passes through the intersection at the current moment, the idle time period calculating module 60 is configured to calculate the duration of time during which no vehicle or pedestrian passes through the intersection, which is described in detail in embodiment 1 above with respect to step S60.
If the duration of no vehicle or pedestrian passing through the intersection is greater than the second threshold, the waiting object detecting module 70 is configured to detect whether there is a vehicle or pedestrian waiting outside the stop line of the target intersection, and the detailed description is described in the above embodiment 1 for step S70.
If the duration of no vehicle or pedestrian passing in the intersection is greater than the second threshold value and vehicles or pedestrians wait outside the stop line of the target intersection, the signal lamp control effect analysis module 40 is further used for analyzing the signal lamp control effect of the target intersection according to the number of the waiting vehicles and pedestrians; if the duration of no vehicle or pedestrian passing in the intersection is greater than the second threshold and no vehicle or pedestrian waiting outside the stop line of the target intersection, or the duration of no vehicle or pedestrian passing in the intersection is less than or equal to the second threshold, the vehicle counting module 50 is triggered.
In an optional embodiment, as shown in fig. 9, the system for analyzing control effect of intersection signal lamps according to the embodiment of the present invention further includes: the time judgment module 80 is configured to judge whether there is a control effect analysis result in a signal lamp switching period at the current time; if the current time is within the signal lamp switching period, the tracking detection device 20 is triggered, and the detailed description is described in the above embodiment 1 for the step S80.
In an optional embodiment, as shown in fig. 10, the system for analyzing control effect of intersection signal lamps according to the embodiment of the present invention further includes: if the control signal in the first direction at the present time is a red light, the parking information storage module 90 is configured to obtain and store vehicle information of all vehicles waiting outside the stop line in the first direction, and the detailed description is given in the above embodiment 1 for step S90 and step S100.
The system for analyzing the control effect of the signal lamp at the intersection provided by the embodiment of the invention also comprises a time judgment module for judging whether the control effect analysis result exists in the signal lamp switching period of the current time, if so, the maximum parking times in the previous signal lamp switching period are known, the recalculation is not needed, the control effect of the signal lamp at the current time can be analyzed directly according to the traffic condition that the control signal of the target intersection is in the green light direction and the control signal is in the red light direction, and the analysis speed of the control effect of the signal lamp is accelerated.
The system for analyzing the control effect of the intersection signal lamp further comprises a parking information storage module, and if the control signal in the first direction at the current moment is the red light, the parking information storage module is used for acquiring and storing the vehicle information of all vehicles waiting outside the stopping line in the first direction, so that the maximum parking times in the first direction can be conveniently calculated subsequently.
Example 3
The present invention provides a computer device, as shown in fig. 11, the computer device mainly includes one or more processors 101 and a memory 102, and fig. 11 takes one processor 101 as an example.
The computer device may further include: an input device 103 and an output device 104.
The processor 101, the memory 102, the input device 103, and the output device 104 may be connected by a bus or other means, and fig. 11 illustrates an example of connection by a bus.
The processor 101 may be a Central Processing Unit (CPU). The Processor 101 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created from use of the intersection signal light control effect analysis device, and the like. Further, the memory 102 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 102 optionally includes a memory remotely located from the processor 101, and these remote memories may be connected to the intersection signal light control effect analysis device via a network. The input device 103 may receive a calculation request (or other numerical or character information) input by a user and generate a key signal input related to the intersection signal light control effect analysis device. The output device 104 may include a display device such as a display screen for outputting the calculation result.
Example 4
The embodiment of the invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions can execute the intersection signal lamp control effect analysis method in any method embodiment. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides an intersection signal lamp control effect analytic system which characterized in that includes:
the parking time calculation module is used for calculating the maximum parking time of the vehicle in the first direction of the target intersection in the previous signal lamp switching period at the current moment;
the tracking detection device is used for detecting the passing states of vehicles and pedestrians in and outside the intersection of the target intersection at the current moment;
the signal lamp detection module is used for detecting control signals of signal lamps in all directions of the target intersection;
the signal lamp control effect analysis module is used for judging whether the maximum parking times is smaller than or equal to a first threshold value or not, and if the maximum parking times is smaller than or equal to the first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic conditions that the control signal of the target intersection is in the green light direction and the control signal is in the red light direction at the current moment;
the intersection signal lamp control effect analysis system further comprises: the vehicle counting module is used for counting the number of passing vehicles in the direction that the control signals are green lights and the number of waiting vehicles in the direction that the control signals are red lights within a preset time period if the maximum number of times of stopping the vehicles in the first direction of the target intersection in the previous signal lamp switching period is greater than the first threshold value and when the vehicles or pedestrians pass through the intersection at the current moment;
the signal lamp control effect analysis module is also used for analyzing the signal lamp control effect of the target intersection according to the number of the vehicles passing through in the direction that the control signal is green and the number of the vehicles waiting in the direction that the control signal is red;
the intersection signal lamp control effect analysis system further comprises: an idle time length calculating module and a waiting target detecting module,
if the maximum number of times of stopping the vehicle at the first direction of the target intersection in the previous signal lamp switching period is greater than the first threshold value and no vehicle or pedestrian passes through the intersection at the current moment, the idle time length calculation module is used for calculating the duration time length of no vehicle or pedestrian passing through the intersection;
if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold, the waiting target detection module is used for detecting whether a vehicle or a pedestrian waits outside the stopping line of the target intersection;
and if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold value and vehicles or pedestrians wait outside the stop line of the target intersection, the signal lamp control effect analysis module is further used for analyzing the signal lamp control effect of the target intersection according to the number of the waiting vehicles and pedestrians.
2. The system for analyzing control effect of intersection signal lamps as claimed in claim 1, wherein the parking number calculating module comprises:
the parking information judgment submodule is used for judging whether a vehicle is parked and waits outside a stopping line in the first direction of the target intersection in the previous signal lamp switching period;
and if a vehicle waits to stop outside the stop line, the stop number determining submodule is used for determining the stop number of the first vehicle outside the stop line in the first direction as the maximum stop number of the vehicle at the first direction of the target intersection.
3. The intersection signal light control effect analysis system of claim 1,
and if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold value and no vehicle or pedestrian waits outside the stop line of the target intersection, or the duration of no vehicle or pedestrian passing in the intersection is less than or equal to the second threshold value, triggering the vehicle counting module.
4. The intersection signal lamp control effect analysis system according to any one of claims 1 to 3, characterized by further comprising:
the time judgment module is used for judging whether a control effect analysis result exists in a signal lamp switching period of the current time or not; and if the signal lamp switching period at the current moment has a control effect analysis result, triggering the tracking detection device.
5. The intersection signal lamp control effect analysis system according to claim 1, further comprising:
and the parking information storage module is used for acquiring and storing the vehicle information of all vehicles waiting outside the stopping line in the first direction if the control signal in the first direction is a red light at the current moment.
6. A method for analyzing the control effect of a crossing signal lamp is characterized by comprising the following steps:
calculating the maximum parking times of the vehicle in the first direction of the target intersection in the previous signal lamp switching period at the current moment;
detecting the traffic states of vehicles and pedestrians in and outside the intersection of the target intersection at the current moment;
detecting control signals of signal lamps in all directions of the target intersection;
if the maximum parking times of the vehicles in the first direction of the target intersection are smaller than or equal to a first threshold value, analyzing the control effect of the signal lamp at the current moment according to the traffic condition that the control signal of the target intersection is the direction of a green light and the control signal is the direction of a red light at the current moment;
if the maximum number of times of parking of the vehicle in the first direction of the target intersection in the previous signal lamp switching period is larger than the first threshold value, detecting whether the vehicle or the pedestrian passes through the intersection of the target intersection at the current moment;
if vehicles or pedestrians pass through the road at the current moment, calculating the number of vehicles passing through in the direction that the control signal is green light and the number of vehicles waiting in the direction that the control signal is red light within a preset time period;
analyzing the signal lamp control effect of the target intersection according to the number of the vehicles passing in the direction that the control signal is green and the number of the vehicles waiting in the direction that the control signal is red;
if no vehicle or pedestrian passes through the intersection at the current moment, judging whether the duration of the passing of the vehicle or the pedestrian in the intersection is greater than a second threshold value or not;
if the duration of no vehicle or pedestrian passing in the intersection is greater than a second threshold value, detecting whether a vehicle or a pedestrian waits outside a stopping line of the target intersection;
and if vehicles or pedestrians wait outside the stop line, analyzing the signal lamp control effect of the target intersection according to the number of the waiting vehicles and pedestrians.
7. The method for analyzing the control effect of intersection signal lamps according to claim 6, wherein the step of calculating the maximum number of stops of the vehicle in the first direction at the target intersection in the previous signal lamp switching period at the current time comprises:
judging whether a vehicle is parked and waits outside a stopping line in the first direction of the target intersection in the previous signal lamp switching period;
and if a vehicle is parked and waited outside the stopping line, determining the number of times of parking of the first vehicle outside the stopping line in the first direction as the maximum number of times of parking of the vehicle in the first direction of the target intersection.
8. The intersection signal lamp control effect analysis method according to claim 6,
and if the duration of no vehicle or pedestrian passing in the intersection is less than or equal to the second threshold, or no vehicle or pedestrian waiting outside the stop line, executing the step of calculating the number of the vehicles passing in the direction of the green light of the control signal and the number of the vehicles waiting in the direction of the red light of the control signal in the preset time period.
9. The intersection signal lamp control effect analysis method according to any one of claims 6 to 8, characterized by further comprising:
judging whether a control effect analysis result exists in a signal lamp switching period of the current moment;
and if the signal lamp switching period at the current moment has a control effect analysis result, executing the step of detecting the passing states of the vehicles and the pedestrians in and outside the intersection of the target intersection at the current moment.
10. The intersection signal lamp control effect analysis method according to claim 6, further comprising:
judging whether the control signal in the first direction at the current moment is a red light or not;
and if the control signal in the first direction is a red light, acquiring and storing the vehicle information of all vehicles waiting outside the stop line in the first direction.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006251910A (en) * | 2005-03-08 | 2006-09-21 | Sumitomo Electric Ind Ltd | Method and device for detecting preceding jam, and preceding jam sensitive control system |
| CN102915636A (en) * | 2012-10-19 | 2013-02-06 | 北京工业大学 | Traffic signal instrument control strategy comprehensive performance validity test system and method |
| CN103337161A (en) * | 2013-07-11 | 2013-10-02 | 上海济安交通工程咨询有限公司 | Optimization method of intersection dynamic comprehensive evaluation and signal control system based on real-time simulation model |
| CN105844927A (en) * | 2016-04-06 | 2016-08-10 | 深圳榕亨实业集团有限公司 | Novel control system and novel control method for sensing and controlling road intersection group signals |
| CN106251651A (en) * | 2016-08-24 | 2016-12-21 | 安徽科力信息产业有限责任公司 | A kind of crossing traffic signal control method utilizing plane cognition technology and system |
| CN107331172A (en) * | 2017-08-25 | 2017-11-07 | 青岛海信网络科技股份有限公司 | A kind of traffic phase adjusting method and device based on road traffic state |
| CN107369320A (en) * | 2017-08-01 | 2017-11-21 | 中国联合网络通信集团有限公司 | Road conditions information gathering method and device, vehicle, bus dispatching method and system |
| CN108615376A (en) * | 2018-05-28 | 2018-10-02 | 安徽科力信息产业有限责任公司 | A kind of integrative design intersection schemes evaluation method based on video detection |
| CN111047882A (en) * | 2019-12-10 | 2020-04-21 | 阿里巴巴集团控股有限公司 | Traffic control signal adjusting method, device, system and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8279086B2 (en) * | 2008-09-26 | 2012-10-02 | Regents Of The University Of Minnesota | Traffic flow monitoring for intersections with signal controls |
| CN106228817B (en) * | 2016-08-09 | 2019-03-26 | 浙江大华技术股份有限公司 | A kind of method and apparatus controlling traffic lights |
| CN106128126B (en) * | 2016-08-24 | 2018-09-07 | 安徽科力信息产业有限责任公司 | The method and system of rush hour chance red light number are reduced using plane cognition technology |
| CN106448191B (en) * | 2016-08-30 | 2019-04-12 | 安徽科力信息产业有限责任公司 | A kind of plane perception crossing traffic signal control method and system that can take into account pedestrian |
| CN107085952B (en) * | 2017-06-28 | 2019-05-07 | 北京数行健科技有限公司 | A kind of method, apparatus and system of evaluation region traffic signal timing scheme |
| CN108665715B (en) * | 2018-05-09 | 2021-04-09 | 上海电科智能系统股份有限公司 | Intelligent traffic studying and judging and signal optimizing method for intersection |
| IT201800006619A1 (en) * | 2018-06-25 | 2019-12-25 | "MANAGEMENT DEVICE FOR A TRAFFIC REGULATING DEVICE" |
-
2020
- 2020-10-14 CN CN202011097485.2A patent/CN112330957B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006251910A (en) * | 2005-03-08 | 2006-09-21 | Sumitomo Electric Ind Ltd | Method and device for detecting preceding jam, and preceding jam sensitive control system |
| CN102915636A (en) * | 2012-10-19 | 2013-02-06 | 北京工业大学 | Traffic signal instrument control strategy comprehensive performance validity test system and method |
| CN103337161A (en) * | 2013-07-11 | 2013-10-02 | 上海济安交通工程咨询有限公司 | Optimization method of intersection dynamic comprehensive evaluation and signal control system based on real-time simulation model |
| CN105844927A (en) * | 2016-04-06 | 2016-08-10 | 深圳榕亨实业集团有限公司 | Novel control system and novel control method for sensing and controlling road intersection group signals |
| CN106251651A (en) * | 2016-08-24 | 2016-12-21 | 安徽科力信息产业有限责任公司 | A kind of crossing traffic signal control method utilizing plane cognition technology and system |
| CN107369320A (en) * | 2017-08-01 | 2017-11-21 | 中国联合网络通信集团有限公司 | Road conditions information gathering method and device, vehicle, bus dispatching method and system |
| CN107331172A (en) * | 2017-08-25 | 2017-11-07 | 青岛海信网络科技股份有限公司 | A kind of traffic phase adjusting method and device based on road traffic state |
| CN108615376A (en) * | 2018-05-28 | 2018-10-02 | 安徽科力信息产业有限责任公司 | A kind of integrative design intersection schemes evaluation method based on video detection |
| CN111047882A (en) * | 2019-12-10 | 2020-04-21 | 阿里巴巴集团控股有限公司 | Traffic control signal adjusting method, device, system and storage medium |
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|---|---|
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