CN115273506B - Traffic signal lamp control method and device and electronic equipment - Google Patents
Traffic signal lamp control method and device and electronic equipment Download PDFInfo
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- CN115273506B CN115273506B CN202210897652.4A CN202210897652A CN115273506B CN 115273506 B CN115273506 B CN 115273506B CN 202210897652 A CN202210897652 A CN 202210897652A CN 115273506 B CN115273506 B CN 115273506B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The application discloses a traffic signal lamp control method, a traffic signal lamp control device and electronic equipment, comprising the following steps: determining a first acquisition period and a second acquisition period which are associated with each other and used for acquiring traffic object flow data; acquiring a first time function of each phase in a first acquisition period and a second time function of each phase in a second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period; determining a candidate adjustment time period for each phase based on the first time function and the second time function; determining a target adjustment period of a target phase, which is a phase determined in each phase, based on the candidate adjustment period of the target phase and the candidate adjustment periods of other phases than the target phase; and controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period. The application can accurately control the green-signal ratio of the signal lamp and effectively prevent the occurrence of intersection congestion.
Description
Technical Field
The present application relates to the field of information processing technologies, and in particular, to a traffic signal lamp control method, a traffic signal lamp control device, and an electronic device.
Background
In the current traffic signal lamp control, the signal lamp control is usually carried out according to fixed time, and because the signal lamp period, the green-signal ratio and the like of many intersections are unreasonably arranged, road congestion is easily caused, and the problem of road congestion cannot be solved by carrying out the signal lamp control according to fixed time.
Disclosure of Invention
In view of this, the present application provides the following technical solutions:
a traffic signal control method comprising:
determining a collection period for collecting traffic object flow data, wherein the collection period at least comprises a first collection period and a second collection period with association relation;
acquiring a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period;
determining a candidate adjustment time period for each phase based on the first time function and the second time function;
determining a target adjustment period of a target phase, which is a phase determined in each of the phases, based on the candidate adjustment period of the target phase and the candidate adjustment periods of other phases than the target phase;
and controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period.
Optionally, the method further comprises:
determining flow data of passing objects corresponding to different time periods of each phase of each acquisition period;
determining a flow saturation parameter corresponding to each time period based on the flow data and a target flow threshold;
and determining a time function according to the flow saturation parameter and the corresponding time period.
Optionally, the determining a candidate adjustment time period for each phase based on the first time function and the second time function includes:
determining a first time period for each phase to meet a congestion condition in the first acquisition period based on the first time function;
determining a second time period for each phase to meet a congestion condition in the second acquisition period based on the second time function;
a candidate adjustment time period for each phase is determined based on the first time period and the second time period.
Optionally, the determining the target adjustment period of the target phase based on the candidate adjustment time of the target phase and the candidate adjustment periods of other phases than the target phase includes:
determining a first phase having a target relationship with the target phase;
a target adjustment period of the target phase is determined based on the candidate adjustment period of the target phase and the candidate adjustment period of the first phase.
Optionally, the controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period includes:
acquiring a signal period of a signal lamp corresponding to the target phase in the target adjustment time period;
determining a target color of the signal lamp to be adjusted in the signal period;
and controlling the display time length of the target lamp color corresponding to the signal lamp to be adjusted to the time length corresponding to the target green-to-signal ratio.
Optionally, the method further comprises:
determining an associated phase corresponding to the target phase;
determining a first adjustment mode of the green-signal ratio of the signal lamp corresponding to the target phase in the target adjustment time period;
determining a second adjustment pattern that matches the first adjustment pattern;
and adjusting the green-signal ratio of the signal lamp with the associated phase within the target adjustment time period based on the second adjustment mode.
Optionally, the method further comprises:
recording a target adjustment time period corresponding to each phase in each acquisition period;
an adjustment period of the phase at a target time is determined based on the target adjustment period, wherein the target time is a future time corresponding to the acquisition period.
A traffic signal control apparatus comprising:
the system comprises a first determining unit, a second determining unit and a first judging unit, wherein the first determining unit is used for determining the acquisition period for acquiring traffic object flow data, and the acquisition period at least comprises a first acquisition period and a second acquisition period with association relation;
the acquisition unit is used for acquiring a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period;
a second determining unit configured to determine a candidate adjustment period of each phase based on the first time function and the second time function;
a third determination unit configured to determine a target adjustment period of a target phase, which is a phase determined in each of the phases, based on the candidate adjustment period of the target phase and the candidate adjustment periods of phases other than the target phase;
and the control unit is used for controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period.
A storage medium having stored thereon a computer program which, when executed by a processor, implements the traffic light control method according to any one of the preceding claims.
An electronic device, the electronic device comprising:
a memory for storing an application program and data generated by the operation of the application program;
a processor for executing the application program to implement the traffic light control method as set forth in any one of the above.
As can be seen from the above technical solution, the present application discloses a traffic signal lamp control method, a device and an electronic device, including: determining a collection period for collecting traffic object flow data, wherein the collection period at least comprises a first collection period and a second collection period with association relation; acquiring a first time function of each phase in a first acquisition period and a second time function of each phase in a second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period; determining a candidate adjustment time period for each phase based on the first time function and the second time function; determining a target adjustment period of a target phase, which is a phase determined in each phase, based on the candidate adjustment period of the target phase and the candidate adjustment periods of other phases than the target phase; and controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period. The application can accurately control the green-signal ratio of the signal lamp and effectively prevent the occurrence of intersection congestion.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic phase diagram according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a traffic signal lamp control method according to an embodiment of the present application;
fig. 3 is a schematic diagram of determining an a-phase congestion period according to an embodiment of the present application;
fig. 4 is a schematic diagram of a congestion period in which an a phase coincides with a B phase according to an embodiment of the present application;
FIG. 5 is a schematic diagram showing the results of the operations after the A phase and the B phase according to the embodiment of the present application;
fig. 6 is a schematic structural diagram of a traffic signal lamp control device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a traffic signal lamp control method which can be applied to a timing adjustment scene of a traffic signal lamp, and can effectively determine the adjustment control information of the green-to-signal ratio of a target phase in a target adjustment time period based on the corresponding relation between the flow saturation of each phase and the time period, thereby realizing stable and self-adaptive prevention of the occurrence of intersection congestion, avoiding the occurrence of the intersection congestion when the intersection has occurred or is about to occur, and improving the accuracy and the effectiveness of the adjustment control information.
For convenience in describing embodiments of the present application, related terms of traffic signals to which the embodiments of the present application are applied will now be described.
At the signal control intersection, each control state (a right of way), that is, a combination of different light colors displayed for different directions of various entrances, is called a traffic signal phase, referring to fig. 1, a phase diagram provided for an embodiment of the present application may include 12 phases in fig. 1, which may be specifically described as north left, north right, south left, south right, east left, east right, west left, west right.
Lamp color: the signal lamp only has three colors of red, green and yellow, and the three lights can alternately appear according to a certain sequence, generally the sequence of green lights, yellow lights and red lights.
Signal period of traffic light: the time it takes for the signal lamp of each phase to go through one green, yellow, red lamp color cycle is one cycle, i.e. the cycle of each phase is typically the same.
And (3) timing: the time length occupied by each lamp color of the signal lamp is indicated, and the time of three lamp colors is added together to form a signal period.
Referring to fig. 2, a flow chart of a traffic light control method according to an embodiment of the present application may include the following steps:
s201, determining a collection period for collecting traffic object flow data.
The acquisition period at least comprises a first acquisition period and a second acquisition period which have an association relation. The association relationship between the first acquisition period and the second acquisition period may be an association relationship capable of representing a time feature, for example, the second acquisition period and the first acquisition period have the same time attribute, such as all working days or all holidays, so that the acquired traffic object flow data can more reflect the data of the actual application scene. For example, if it is necessary to predict the congestion condition of the intersection of Saturday and adjust the traffic signal according to the congestion condition, both the first acquisition period and the second acquisition period may be acquisition periods corresponding to the previous holidays. If the traffic congestion situation of the friday intersection needs to be predicted, the first acquisition period may be the friday preceding the friday, and the second acquisition period may include friday, and friday. It should be noted that, the first acquisition period and the second acquisition period may each include a plurality of time periods, the first acquisition period may be the acquisition period closest to the time to be adjusted, and the second acquisition period may be the acquisition time period before the first acquisition period. For example, if it is required to predict the road congestion condition of No. 9, the first acquisition period is No. 8, and the second acquisition period may include No. 6, no. 7, and No. 8. Correspondingly, each acquisition period can comprise a plurality of acquisition time periods, and if the first acquisition period is 24 hours in minutes, the corresponding acquisition time periods are 1440. The second acquisition period may include a plurality of sub-acquisition periods, each of which is also a duration that matches the first acquisition period, i.e., one day, and corresponding to 1440 acquisition periods of each sub-acquisition period. Specifically, if the second acquisition period includes at least one sub-acquisition period, the acquisition duration of the sub-acquisition period is the same as the acquisition duration of the first acquisition period, and the size of the acquisition time period is also the same, the number of the sub-acquisition periods in the second acquisition period and the size of the acquisition time period can be determined based on an actual application scene.
The collection of traffic object flow data through the collection period can avoid the deviation problem of estimating the congestion condition only by the current collection time. In the embodiment of the application, the passing objects comprise pedestrians and/or passing vehicles, and can be determined based on specific application scenes.
S202, acquiring a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period.
The time function characterizes the corresponding relation between the flow saturation of the passing object and the time periods, wherein the first acquisition period and the second acquisition period are divided by the same time length, so that a plurality of time periods can be obtained, for example, 1440 time periods can be included in units of minutes. Flow saturation refers to the ratio of the actual traffic flow to the saturated traffic capacity of the vehicle. The flow saturation is obtained by dividing the traffic flow of a road or intersection by the traffic capacity of the road or intersection.
The time function may be a function of 0 and 1 with respect to time, i.e. the flow saturation parameter corresponding to the flow saturation is 0 or 1. Whether the flow saturation parameter is 0 or 1 may be determined according to the set target flow threshold.
Correspondingly, in the embodiment of the application, a method for generating a time function is also provided, and the method can comprise the following steps: determining flow data of passing objects corresponding to different time periods of each phase of each acquisition period; determining a flow saturation parameter corresponding to each time period based on the flow data and a target flow threshold; and determining a time function according to the flow saturation parameter and the corresponding time period.
The phase is each phase of the current intersection, and the traffic data of the traffic objects may be a value corresponding to the traffic saturation, or may be the number of traffic objects in the current time period. The target flow threshold may be set according to the attribute of the selected flow data, and specifically, may be set according to the historical traffic flow data corresponding to the current phase. When the data value corresponding to the flow data of each time period is greater than or equal to the target flow threshold, determining that the flow saturation parameter corresponding to the time period is 1, otherwise, determining that the flow saturation parameter corresponding to the time period is 0, and finally generating 0 and 1 functions of the phase along with time according to the flow saturation parameter and the corresponding time period.
Based on the time function, flow saturation data corresponding to each phase in each time period can be obtained.
S203, determining a candidate adjustment time period of each phase based on the first time function and the second time function.
The corresponding time periods in the first time function and the second time function are the same, but the corresponding acquisition dates are different, for example, the first time function may be a time function generated according to the flow data acquired in the 4 month 9 for 0-24 hours, the second time function may be a time function generated according to the flow data acquired in the 4 month 8 for 0-24 hours, and the corresponding second time function may be multiple.
The time period during which each phase is relatively congested in each acquisition period may be determined from the first time function and the second time function, and the time period is determined as a candidate adjustment time period. Correspondingly, in one embodiment, the determining the candidate adjustment time period of each phase based on the first time function and the second time function includes: determining a first time period for each phase to meet a congestion condition in a first acquisition period based on a first time function; determining, based on a second time function, a second time period for each phase to meet a congestion condition in a second acquisition period; a candidate adjustment time period for each phase is determined based on the first time period and the second time period.
In this embodiment, the congestion condition may be determined based on a time function, and if the time function is a function of 0 and 1 obtained with respect to time, the period in which the congestion condition is satisfied is a period corresponding to 1. Further, the period of time in which the congestion condition is satisfied may also correspond to a period of time in which the duration of the period of time is greater than the duration threshold, e.g., a period of time corresponding to 1 indicates congestion, but the congestion period of time is only 0.5 minutes, and may not be within the range of the candidate adjustment period of time. Specifically, after the first period and the second period are obtained, the candidate adjustment period may be determined by and operation. For example, the first time period of phase A is 1-4 minutes and the second time period of phase A is 2-5 minutes, then the candidate adjustment time period of phase A is 2-4 minutes.
S204, determining the target adjustment time period of the target phase based on the candidate adjustment time period of the target phase and the candidate adjustment time periods of other phases except the target phase.
The target phase is a phase determined in each phase, that is, one of the phases belonging to the current intersection. For example, a certain phase to be adjusted may be designated, or a phase with the largest number of congestion occurrences may be determined according to a time function.
The mutual influence at the time of each phase adjustment is eliminated by comparing the candidate adjustment period according to the target phase and the candidate adjustment periods of other phases than the target phase. The other phases may be each phase except the target phase, or may be selected to influence the partial phase of the target phase adjustment, so as to improve the processing efficiency. In one embodiment, the determining the target adjustment period of the target phase based on the candidate adjustment time of the target phase and the candidate adjustment periods of other phases than the target phase includes: determining a first phase having a target relationship with the target phase; the target adjustment period of the target phase is determined based on the candidate adjustment period of the target phase and the candidate adjustment period of the first phase.
In this embodiment, the target relationship may be a relationship of phases in the related directions of traffic, or may be a relationship corresponding to the order of phase changes, for example, the target phase is north straight in fig. 1, and the corresponding south straight phase should have the same phase adjustment time as north straight phase, so that it does not belong to the range of the first phase. If the north straight phase is adjusted, the transit time of the signal lamp of the east straight and the west straight is affected, and therefore, the first phase can be determined as the phase corresponding to the east straight and the west straight. Thus, the first phase with the relation is determined first and then the subsequent processing is carried out, and compared with the candidate adjustment time period of the target phase and the candidate time periods of all other phases, the processing efficiency is higher, and the computational resource is less utilized.
Specifically, when the target adjustment period is determined by processing the candidate period of the target phase and the candidate period of the first phase, an exclusive or operation may be used to exclude the congested conflicting phases. Assuming that the candidate adjustment period of the a phase is 2 to 4 minutes and the candidate adjustment period of the B phase is 3 to 5 minutes, the target adjustment period of the a phase is 2 to 3 minutes and the target adjustment period of the B phase is 4 to 5 minutes.
S205, controlling a signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period.
The green-to-signal ratio refers to the proportion of time that a signal lamp is available for vehicle traffic in one signal period, i.e., the ratio of the effective green time of a phase to the duration of the signal period.
Specifically, the green light duration may be prolonged in the signal period corresponding to the target adjustment period, or the red light duration may be shortened. In one embodiment, the signal lamp corresponding to the control target phase performs adjustment of the green-to-signal ratio in a target adjustment period, including: acquiring a signal period of a signal lamp corresponding to a target phase in a target adjustment time period; determining a target color of the signal lamp to be adjusted in a signal period; and controlling the display time length of the target lamp color corresponding to the signal lamp to be adjusted to the time length corresponding to the target green-to-signal ratio. The target green-signal ratio comprises the minimum duration of the green light corresponding to the condition of the target phase congestion in the current target adjustment time period. The target light color can be red light or green light, if the target light color is red light, the time length of the current red light can be shortened according to the target green signal ratio, and if the target light color is green light, the time length of the current green light can be prolonged according to the target green signal ratio. It should be noted that the total duration of the signal period is unchanged.
According to the traffic signal lamp control method provided by the embodiment of the application, the target adjustment time period of the target phase to be adjusted can be determined by recording the time function of each phase in each acquisition period, and then the signal lamp corresponding to the target phase is controlled to adjust the green-to-signal ratio in the target adjustment time period. The method and the system can stably and adaptively predict the occurrence of the congestion condition of the intersection based on the existing acquired data corresponding to each acquisition period, and the related data of the signal lamp does not need to be adjusted when the intersection is already or is about to be congested, so that the convenience of prediction and the accuracy of control are improved.
In order to reduce the congestion situation more effectively, the phase associated with the target phase can be synchronously adjusted after the adjustment mode corresponding to the target phase is determined. In one implementation manner of the embodiment of the application, the method further comprises the following steps:
determining an associated phase corresponding to the target phase;
determining a first adjustment mode of a green-signal ratio of a signal lamp corresponding to a target phase in a target adjustment time period;
determining a second adjustment pattern that matches the first adjustment pattern;
and adjusting the green-signal ratio of the signal lamp with the associated phase in the target adjustment time period based on the second adjustment mode.
The associated phase may be a phase opposite to a communication line controlled by the target phase, for example, the target phase controls the passing object to pass from north to south, the associated phase may control the passing object to pass from north to south, if the signal periods of the target phase and the associated phase and the start time of the green light are the same, the second adjustment mode is the same as the first adjustment mode, and if the start time of the green light is different, the second adjustment mode may be obtained after adaptively adjusting according to the first adjustment mode. For another example, at some traffic intersections, the traffic lights of the pedestrians are controlled by separate traffic lights in the same direction, and if the traffic lights corresponding to the vehicles are adjusted, the traffic lights of the pedestrians can be correspondingly adjusted according to the adjustment modes of the traffic lights corresponding to the vehicles, so that calculation does not need to be reproduced.
In one implementation manner of the embodiment of the present application, the method further includes:
recording a target adjustment time period corresponding to each phase in each acquisition period;
an adjustment period of the phase of the target time is determined based on the target adjustment period.
Wherein the target time is a future time corresponding to the acquisition period. Therefore, the method and the device can be applied to a scene of predicting the intersection congestion and adjusting the control information of the signal lamp based on the historical data acquired in the acquisition period. The control information of the signal lamp in a future time period can be generated in advance, and the occurrence of intersection congestion is effectively prevented.
The traffic signal lamp control method provided by the embodiment of the application is described below in an actual application scene.
The data acquisition can be carried out through road side equipment of the intersection in a corresponding acquisition period, if the acquired data are related data of the traffic saturation, the road side equipment can sense the saturation of each phase of the intersection, on the basis of calculating the saturation, the saturation corresponding to each phase of each acquisition period (such as each day) in different time periods is stored, the traffic saturation data in 24 hours can be traversed in the early morning of each day, statistics and a preset threshold value are compared, a function of 0 and 1 about time is obtained, iterative calculation is adopted to obtain a time period needing to be adjusted, the time period needing to be adjusted is obtained, exclusive OR operation is carried out with time functions of other phases, and the time period needing to be adjusted without phase conflict can be obtained by carrying out exclusive OR operation. Then, the green light time can be prolonged in the time period, the rest time periods do not need to be adjusted, and finally, an adjustment strategy corresponding to the adjustment process is sent to a traffic signal controlling signal lamp, and the signal is used for controlling the adjustment of the traffic signal lamp periodically.
Specifically, assuming that the phase sequence is a, B, C, and D, i.e., the next phase of the a phase is the B phase, the acquisition period is daily, there are 1440 minutes a day, the horizontal axis is the minutes per day, the vertical axis is the traffic saturation parameter (may also be referred to as congestion parameter), the parameter has two values, i.e., 0 and 1, indicating congestion, 0 indicates no congestion, a specific intersection congestion value exceeding a certain threshold is considered to be a congestion state and is recorded as 1, otherwise, as 0, and a 0,1 function of the phase over time can be obtained at this time for a certain phase, expressed in g (t), g (t) ε [0,1], where t represents time, tpe [0, 1440].
If the acquisition period includes a first day and a second day, 1-4 minutes of the first day is a period of a-phase congestion, 2-5 minutes of the second day is also a period of a-phase congestion, and the two days (or the results of multiple iterations) are subjected to AND operation, so that a congestion period in which the maximum probability of the a-phase needs to be adjusted to a green-signal ratio, namely, a target adjustment period is 2-4 minutes. Referring to fig. 3, in fig. 3, a vertical axis V represents a flow saturation parameter (may also be referred to as a congestion degree parameter), a horizontal axis T represents time, fig. 3 shows only a part of a time period, and a subsequent time function is similar.
Similarly, assuming that the maximum probability congestion time period of the B phase in the first two days is 3-5 minutes, referring to fig. 4, the congestion time period of the a phase and the B phase overlapping can be eliminated, that is, the adjacent a phase and B phase are subjected to exclusive or operation, and the congested conflict phase is eliminated, so as to obtain fig. 5. As can be seen from fig. 5, the congestion time period for the a phase to be adjusted is 2-3 minutes per day, and the green light time can be prolonged or the red light time of the phase can be shortened to relieve congestion.
Correspondingly, the same processing mode can be adopted for the B, C, D phase, a time period needing to be optimized can be obtained every day except for the first day, the time period needing to be optimized for each phase is stored every day, so that iterative computation can be carried out by using stored data every day later, the optimized strategy is issued to a annunciator, the stability of the optimized time period can be guaranteed to the maximum extent, and the function of predicting congestion in advance is achieved.
In another embodiment of the present application, there is also provided a traffic light control apparatus, referring to fig. 6, which may include:
a first determining unit 601, configured to determine an acquisition period for acquiring traffic object flow data, where the acquisition period includes at least a first acquisition period and a second acquisition period that have an association relationship;
an obtaining unit 602, configured to obtain a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period, where the time functions represent a correspondence between a traffic saturation of a traffic object and a time period;
a second determining unit 603 for determining a candidate adjustment time period for each phase based on the first time function and the second time function;
a third determining unit 604 configured to determine a target adjustment period of a target phase, which is a phase determined in each of the phases, based on the candidate adjustment period of the target phase and the candidate adjustment periods of phases other than the target phase;
and a control unit 605, configured to control the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment period.
The embodiment of the application discloses a traffic signal lamp control device, which comprises: the first determining unit determines a collection period for collecting traffic object flow data, wherein the collection period at least comprises a first collection period and a second collection period with association relation; the method comprises the steps that an acquisition unit acquires a first time function of each phase in a first acquisition period and a second time function of each phase in a second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of a passing object and a time period; the second determining unit determines a candidate adjustment time period of each phase based on the first time function and the second time function; the third determining unit determines a target adjustment period of the target phase, which is a phase determined in each phase, based on the candidate adjustment period of the target phase and the candidate adjustment periods of other phases than the target phase; the control unit controls the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period. The application can accurately control the green-signal ratio of the signal lamp and effectively prevent the occurrence of intersection congestion.
In an embodiment, the apparatus further comprises a time function generating unit for:
determining flow data of passing objects corresponding to different time periods of each phase of each acquisition period;
determining a flow saturation parameter corresponding to each time period based on the flow data and a target flow threshold;
and determining a time function according to the flow saturation parameter and the corresponding time period.
Optionally, the second determining unit 603 includes:
a first determining subunit, configured to determine, based on the first time function, a first period of time during which each phase satisfies a congestion condition in the first acquisition period;
a second determining subunit, configured to determine, based on the second time function, a second time period during which each phase satisfies a congestion condition in the second acquisition period;
and a third determining subunit configured to determine a candidate adjustment period for each phase based on the first period and the second period.
Optionally, the third determining unit 604 includes:
a fourth determination subunit configured to determine a first phase having a target relationship with the target phase;
and a fifth determining subunit configured to determine a target adjustment period of the target phase based on the candidate adjustment period of the target phase and the candidate adjustment period of the first phase.
In one embodiment, the control unit 605 is specifically configured to:
acquiring a signal period of a signal lamp corresponding to the target phase in the target adjustment time period;
determining a target color of the signal lamp to be adjusted in the signal period;
and controlling the display time length of the target lamp color corresponding to the signal lamp to be adjusted to the time length corresponding to the target green-to-signal ratio.
Optionally, the apparatus further comprises an association adjustment unit for:
determining an associated phase corresponding to the target phase;
determining a first adjustment mode of the green-signal ratio of the signal lamp corresponding to the target phase in the target adjustment time period;
determining a second adjustment pattern that matches the first adjustment pattern;
and adjusting the green-signal ratio of the signal lamp with the associated phase within the target adjustment time period based on the second adjustment mode.
Further, the device also comprises a fourth determining unit for
Recording a target adjustment time period corresponding to each phase in each acquisition period;
an adjustment period of the phase at a target time is determined based on the target adjustment period, wherein the target time is a future time corresponding to the acquisition period.
It should be noted that, the specific implementation of each unit and sub-unit in this embodiment may refer to the corresponding content in the foregoing, which is not described in detail herein.
In another embodiment of the present application, there is also provided a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the traffic light control method as set forth in any one of the above.
In another embodiment of the present application, there is also provided an electronic device, which may include:
a memory for storing an application program and data generated by the operation of the application program;
a processor for executing the application program to implement the traffic light control method as set forth in any one of the above.
It should be noted that, the specific implementation of the processor in this embodiment may refer to the corresponding content in the foregoing, which is not described in detail herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A traffic signal control method comprising:
determining a collection period for collecting traffic object flow data, wherein the collection period at least comprises a first collection period and a second collection period with association relation;
acquiring a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period;
determining a candidate adjustment time period for each phase based on the first time function and the second time function;
determining a target adjustment period of a target phase, which is a phase determined in each of the phases, based on the candidate adjustment period of the target phase and the candidate adjustment periods of other phases than the target phase;
and controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period.
2. The method of claim 1, the method further comprising:
determining flow data of passing objects corresponding to different time periods of each phase of each acquisition period;
determining a flow saturation parameter corresponding to each time period based on the flow data and a target flow threshold;
and determining a time function according to the flow saturation parameter and the corresponding time period.
3. The method of claim 1, the determining a candidate adjustment period for each phase based on the first time function and the second time function, comprising:
determining a first time period for each phase to meet a congestion condition in the first acquisition period based on the first time function;
determining a second time period for each phase to meet a congestion condition in the second acquisition period based on the second time function;
a candidate adjustment time period for each phase is determined based on the first time period and the second time period.
4. The method of claim 1, the determining the target adjustment period of the target phase based on the candidate adjustment time of the target phase and the candidate adjustment periods of other phases than the target phase, comprising:
determining a first phase having a target relationship with the target phase;
a target adjustment period of the target phase is determined based on the candidate adjustment period of the target phase and the candidate adjustment period of the first phase.
5. The method of claim 1, wherein the controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment period comprises:
acquiring a signal period of a signal lamp corresponding to the target phase in the target adjustment time period;
determining a target color of the signal lamp to be adjusted in the signal period;
and controlling the display time length of the target lamp color corresponding to the signal lamp to be adjusted to the time length corresponding to the target green-to-signal ratio.
6. The method of claim 1, the method further comprising:
determining an associated phase corresponding to the target phase;
determining a first adjustment mode of the green-signal ratio of the signal lamp corresponding to the target phase in the target adjustment time period;
determining a second adjustment pattern that matches the first adjustment pattern;
and adjusting the green-signal ratio of the signal lamp with the associated phase within the target adjustment time period based on the second adjustment mode.
7. The method of claim 1, the method further comprising:
recording a target adjustment time period corresponding to each phase in each acquisition period;
an adjustment period of the phase at a target time is determined based on the target adjustment period, wherein the target time is a future time corresponding to the acquisition period.
8. A traffic signal control apparatus comprising:
the system comprises a first determining unit, a second determining unit and a first judging unit, wherein the first determining unit is used for determining the acquisition period for acquiring traffic object flow data, and the acquisition period at least comprises a first acquisition period and a second acquisition period with association relation;
the acquisition unit is used for acquiring a first time function of each phase in the first acquisition period and a second time function of each phase in the second acquisition period, wherein the time functions represent the corresponding relation between the flow saturation of the passing object and the time period;
a second determining unit configured to determine a candidate adjustment period of each phase based on the first time function and the second time function;
a third determination unit configured to determine a target adjustment period of a target phase, which is a phase determined in each of the phases, based on the candidate adjustment period of the target phase and the candidate adjustment periods of phases other than the target phase;
and the control unit is used for controlling the signal lamp corresponding to the target phase to adjust the green-signal ratio in the target adjustment time period.
9. A storage medium having stored thereon a computer program which, when executed by a processor, implements the traffic light control method according to any one of claims 1-7.
10. An electronic device, the electronic device comprising:
a memory for storing an application program and data generated by the operation of the application program;
a processor for executing the application program to implement the traffic light control method according to any one of claims 1-7.
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