CN111951561B

CN111951561B - Method and device for determining adjustment strategy of signal control scheme

Info

Publication number: CN111951561B
Application number: CN202010898932.8A
Authority: CN
Inventors: 毛炳华; 燕丽敬; 叶赛敏; 郝勇刚; 姜伟浩
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-10-04
Anticipated expiration: 2040-08-31
Also published as: CN111951561A

Abstract

The embodiment of the invention provides a method and a device for determining an adjustment strategy of a signal control scheme, and relates to the technical field of intelligent traffic. The method comprises the following steps: when entering each preset adjusting period, acquiring vehicle passing data of a plurality of signal periods before the current moment of the appointed intersection; calculating the green light utilization rate of each phase of the appointed intersection by using the vehicle passing data; if a target utilization rate smaller than a preset utilization rate exists in the calculated green light utilization rate, determining a phase to be adjusted; and determining the phase time length to be set of the phase to be adjusted in the current adjustment period based on the current phase time length of the first phase to obtain an adjustment strategy of the signal control scheme of the specified intersection. Compared with the prior art, the scheme provided by the embodiment of the invention can provide effective adjustment basis for the phase duration for improving the matching degree of the phase duration of each phase of the intersection and the traffic flow of the intersection.

Description

Method and device for determining adjustment strategy of signal control scheme

Technical Field

The invention relates to the technical field of intelligent traffic, in particular to a method and a device for determining an adjustment strategy of a signal control scheme.

Background

In order to ensure the safety of vehicles and pedestrians on roads and to maintain road traffic order, traffic control signals, such as traffic lights, may be provided at each road intersection.

Therefore, after the traffic control signal is set for the road intersection, the signal control scheme of the road intersection can be further set, and then after the signal control scheme of the road intersection is set, all phases of the road intersection can obtain the right of way according to the change condition of the traffic control signal indicated by the signal control scheme, so that the road traffic is smooth, and the traffic jam and disorder are reduced.

Here, the phase means: the sequence group of one or more traffic flows which can simultaneously acquire right of way set according to the road traffic requirement in the signal cycle time can also be called signal phase. The signal period is: and each phase of the road intersection acquires the time duration of one-time right of passage in sequence. The time length of each phase having the right of way in each signal period can be referred to as the phase time length of the phase.

In the related art, in a signal control scheme of a road intersection, phase duration of each phase is determined by a traffic management department according to an empirical value by using data such as historical traffic flow of the road intersection.

The inventor discovers that in the process of implementing the invention: since the change of the traffic flow at the intersection is irregular, there may be a problem that the phase duration of each phase at the intersection is not matched with the traffic flow at the intersection.

Based on this, there is a need for a method for determining an adjustment strategy of a signal control scheme, so as to provide an effective adjustment basis for phase duration for improving the matching degree between the phase duration of each phase at a road intersection and the traffic flow at the road intersection.

Disclosure of Invention

The embodiment of the invention aims to provide a method and a device for determining an adjustment strategy of a signal control scheme, which are used for providing an effective adjustment basis for phase duration in order to improve the matching degree between the phase duration of each phase of a road intersection and the traffic flow of the road intersection. The specific technical scheme is as follows:

in a first aspect, an embodiment of the present invention provides a method for determining an adjustment policy for a signal control scheme, where the method includes:

when entering each preset adjusting period, acquiring vehicle passing data of a plurality of signal periods before the current moment of the appointed intersection; in the plurality of signal periods, the signal control scheme of the traffic control signal of the specified intersection is the same as the signal control scheme of the traffic control signal of the specified intersection at the current moment;

calculating the green light utilization rate of each phase of the appointed intersection by using the vehicle passing data;

if the calculated green light utilization rate has a target utilization rate smaller than a preset utilization rate, determining a phase to be adjusted; wherein, the lane that the phase place corresponds of treating to adjust includes at least: the lane corresponding to the first phase with the target utilization rate;

and determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase to obtain an adjustment strategy of the signal control scheme of the specified intersection.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection or a T-shaped intersection, the step of determining the phase to be adjusted includes:

determining the first phase as a phase to be adjusted;

correspondingly, the step of determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase includes:

and determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light.

Optionally, in a specific implementation manner, the step of determining, based on the current phase duration of the first phase and the utilization rate of the green light, a phase duration to be set of the phase to be adjusted in the current adjustment period includes:

determining the phase duration to be set of the phase to be adjusted in the current adjustment period by using a preset formula; wherein the preset formula is:

T＝t-(1-α)*T _G

wherein T is to be set for the phase to be adjusted in the current adjustment periodThe phase duration, T is the current phase duration of the first phase, alpha is the calculated green light utilization rate of the first phase, and T _G Comprises the following steps: and in the current phase time length of the first phase, the time length of the green light control signal corresponding to the first phase.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection, the step of determining the phase to be adjusted includes:

if the total number of the phases of the specified intersection and the number of the first phases are both 1, determining the phase of the specified intersection as a phase to be adjusted;

otherwise, combining the phases of the specified intersection, and determining the combined phase as the phase to be adjusted.

Optionally, in a specific implementation manner, the step of determining, based on the current phase duration of the first phase, a phase duration to be set of the phase to be adjusted in the current adjustment period includes:

if the total number of the phases at the appointed intersection and the number of the first phases are both judged to be 1, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of green light;

if the total number of the phases at the specified intersection is judged to be 2 and the number of the first phases is judged to be 1, determining the maximum value in the current phase duration of each phase at the specified intersection as the phase duration of the phase to be adjusted;

and if the total number of the phases at the appointed intersection and the number of the first phases are both judged to be 2, determining the phase duration of the phase to be adjusted based on the current phase duration and the green light utilization rate of any phase in each phase at the appointed intersection.

Optionally, in a specific implementation manner, when the designated intersection is a T-shaped intersection, the step of determining the phase to be adjusted includes:

for each of the first phases, determining a second phase in the designated intersection based on a type of the first phase; wherein the second phase is: a phase that can be combined with the first phase among candidate phases, the candidate phases being: in each phase of the appointed intersection, other phases except all the first phases are selected;

determining phases to be adjusted based on the number of the first phases and a second phase determination result of each first phase; wherein the second phase determination result for each first phase is: for characterizing the result of whether the second phase is determined in the candidate phases.

Optionally, in a specific implementation manner, the step of determining the phase to be adjusted based on the number of the first phases and the second phase determination result of each first phase includes:

when the number of the first phases is 1, if the second phase is determined, combining the first phases and the second phase, and determining the combined phase as a phase to be adjusted; if the second phase is not determined, determining the first phase as a phase to be adjusted;

when the number of the first phases is multiple, at least one first phase is selected from the first phases; for each selected first phase, if the second phase is determined, combining the first phase and the second phase, and determining the combined phase as a phase to be adjusted; and if the second phase is not determined, determining the first phase as the phase to be adjusted.

Optionally, in a specific implementation manner, the step of determining the second phase at the designated intersection based on the type of the first phase includes:

if the first phase is the right-turn phase of the T-shaped intersection, determining the same-direction phase of the right-turn phase in the T-shaped intersection as a second phase; the passing direction of the same-direction phase of the right-turn phase entering the T-shaped intersection is the same as the passing direction of the right-turn phase entering the T-shaped intersection;

and if the first phase is a non-right-turn phase at the T-shaped intersection, determining a second phase from the candidate phases based on a preset priority combination rule.

Optionally, in a specific implementation manner, the T-shaped intersection includes 4 standard phases, where the 4 standard phases include: two straight going phases and two left-turn phases of a transverse road of the T-shaped intersection, wherein the two left-turn phases are as follows: a phase of a longitudinal road turning left from the transverse road to the T-shaped intersection and a phase of a longitudinal road turning left from the longitudinal road to the transverse road;

the step of determining a second phase from the candidate phases based on a preset priority combination rule includes:

determining phase combination information of each phase of the specified intersection; the phase combination information of each phase is used for representing whether the phase is obtained by combining a plurality of standard phases or not, and when the phase is obtained by combining a plurality of standard phases, a plurality of standard phases of the phase are obtained by combining;

and determining a second phase of the first phase from the candidate phases based on the determined phase combination information of each phase and a preset priority combination rule.

Optionally, in a specific implementation manner, the preset priority merging rule is:

the corresponding lanes respectively comprise lanes corresponding to different phases in the symmetrical phases, and the combination priority of the two phases of the lanes corresponding to the different phases in the strong conflict phases is not the highest;

the corresponding lanes respectively comprise lanes corresponding to different phases in the same entrance phase and do not comprise the second combined priority of the two behaviors of the lanes corresponding to different phases in the strong conflict phase;

the corresponding lanes respectively comprise two behaviors of lanes corresponding to different phases in the strong conflict phases, and the two behaviors are not combined;

wherein the two straight-going phases are symmetrical phases; any left-turn phase and the target same-direction passing phase are the same entrance phase, and the target same-direction passing phase is as follows: the passing direction in the cross lane or the longitudinal lane is the same phase as the passing direction in the cross lane or the longitudinal lane of the left turn phase; the two left-hand phases are strong collision phases.

if the second phase is determined, determining the phase duration to be set of the phase to be adjusted in the current adjustment period from the current phase durations of the first phase and the second phase;

and if the second phase is not determined, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light.

Optionally, in a specific implementation manner, the step of determining, from current phase durations of the first phase and the second phase, a phase duration to be set of the phase to be adjusted in a current adjustment period includes:

if the first phase is the right-turn phase of the T-shaped intersection, determining the current phase duration of the second phase as the phase duration to be set of the phase to be adjusted in the current adjustment period;

and if the first phase is the non-right-turn phase of the T-shaped intersection, determining the maximum value of the current phase time length of the first phase and the current phase time length of the second phase as the phase time length to be set of the phase to be adjusted in the current adjustment period.

Optionally, in a specific implementation manner, the method further includes:

judging whether the signal period is within a preset period range interval or not;

if not, adjusting the current phase duration of each phase of the appointed intersection according to the ratio of the maximum value of the preset period range interval to the signal period.

Optionally, in a specific implementation manner, the method further includes:

and adjusting the duration of the green light control signal corresponding to the phase to be adjusted by using the obtained adjustment strategy of the signal control scheme.

In a second aspect, an embodiment of the present invention provides an apparatus for determining an adjustment policy for a signal control scheme, where the apparatus includes:

the data acquisition module is used for acquiring vehicle passing data of a plurality of signal periods before the current moment of the appointed intersection when entering each preset adjustment period; the signal control scheme of the traffic control signal of the specified intersection in the plurality of signal periods is the same as the signal control scheme of the traffic control signal of the specified intersection at the current moment;

the utilization rate calculation module is used for calculating the green light utilization rate of each phase of the specified intersection by using the vehicle passing data;

the phase determining module is used for determining the phase to be adjusted if a target utilization rate smaller than a preset utilization rate exists in the calculated green light utilization rate; wherein, the lane that the phase place corresponds to waiting to adjust includes at least: the lane corresponding to the first phase with the target utilization rate;

and the time length setting module is used for determining the time length of the phase to be adjusted in the current adjustment period based on the current phase time length of the first phase, so as to obtain the adjustment strategy of the signal control scheme of the specified intersection.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection or a T-shaped intersection, the phase determining module is specifically configured to:

determining the first phase as a phase to be adjusted;

correspondingly, the duration setting module is specifically configured to:

and determining the phase time length to be set of the phase to be adjusted in the current adjustment period as a target time length based on the current phase time length of the first phase and the utilization rate of the green light.

Optionally, in a specific implementation manner, the duration setting module is specifically configured to:

determining the phase duration to be set of the phase to be adjusted in the current adjustment period by using a preset formula; wherein the preset formula is as follows:

T＝t-(1-α)*T _G

wherein T is the phase duration to be set of the phase to be adjusted in the current adjustment period, T is the current phase duration of the first phase, α is the calculated utilization rate of the green light of the first phase, and T _G Comprises the following steps: and in the current phase time length of the first phase, the time length of the green light control signal corresponding to the first phase.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection, the phase determining module is specifically configured to:

otherwise, combining all phases of the specified intersection, and determining the combined phases as phases to be adjusted.

Optionally, in a specific implementation manner, when the designated intersection is a T-shaped intersection, the phase determining module includes:

a first determining submodule, configured to determine, for each of the first phases, a second phase at the designated intersection based on a type of the first phase; wherein the second phase is: a phase that can be combined with the first phase among candidate phases, the candidate phases being: in each phase of the specified intersection, other phases except all the first phases;

the second determining submodule is used for determining the phase to be adjusted based on the number of the first phases and a second phase determining result of each first phase; wherein the second phase determination result for each first phase is: for characterizing the result of whether the second phase is determined in the candidate phases.

Optionally, in a specific implementation manner, the second determining submodule is specifically configured to:

when the number of the first phases is multiple, at least one first phase is selected from the first phases; aiming at each selected first phase, if the second phase is determined, combining the first phase and the second phase, and determining the combined phase as a phase to be adjusted; and if the second phase is not determined, determining the first phase as the phase to be adjusted.

Optionally, in a specific implementation manner, the first determining sub-module includes:

the first determining unit is used for determining a same-direction phase of the right-turn phase at the T-shaped intersection as a second phase if the first phase is the right-turn phase at the T-shaped intersection; the passing direction of the same-direction phase of the right-turn phase entering the T-shaped intersection is the same as the passing direction of the right-turn phase entering the T-shaped intersection;

and the second determining unit is used for determining a second phase from the candidate phases based on a preset priority combination rule if the first phase is a non-right-turn phase at the T-shaped intersection.

Optionally, in a specific implementation manner, the T-shaped intersection has 4 standard phases, where the 4 standard phases include: the two straight-going phases and the two left-turn phases are: a phase of a longitudinal road turning left from the transverse road to the T-shaped intersection and a phase of a longitudinal road turning left from the longitudinal road to the transverse road; the second determining unit is specifically configured to:

determining standard phase combination information of each phase of the specified intersection; the standard phase combination information of each phase is used for representing whether the phase is obtained by combining a plurality of standard phases or not, and when the phase is obtained by combining a plurality of standard phases, a plurality of standard phases of the phase are obtained by combining;

and determining a second phase of the first phase from the candidate phases based on the determined standard phase combination information of each phase and a preset priority combination rule.

wherein the two straight-going phases are symmetrical phases; any left-turn phase and the target same-direction passing phase are the same entrance phase, and the target same-direction passing phase is as follows: the passing direction in the cross lane or the longitudinal lane is the same phase as the passing direction in the cross lane or the longitudinal lane of the left turn phase; the two left-turn phases are strong collision phases.

Optionally, in a specific implementation manner, the duration setting module includes:

the first setting subunit is configured to determine, if the second phase is determined, a phase duration to be set of the phase to be adjusted in a current adjustment period from current phase durations of the first phase and the second phase;

and the second setting subunit is configured to determine, if the second phase is not determined, a to-be-set phase duration of the to-be-adjusted phase in the current adjustment period based on the current phase duration of the first phase and the green light utilization rate.

Optionally, in a specific implementation manner, the first setting subunit is specifically configured to:

if the first phase is the right turn phase of the T-shaped intersection, determining the current phase duration of the second phase as the phase duration to be set of the phase to be adjusted in the current adjustment period;

Optionally, in a specific implementation manner, the apparatus further includes:

the time length judging module is used for judging whether the signal period is within a preset period range interval or not; if not, triggering a time length adjusting module;

and the time length adjusting module is used for adjusting the current phase time length of each phase of the appointed intersection according to the ratio of the maximum value of the preset period range interval to the signal period.

and the phase adjusting module is used for adjusting the duration of the green light control signal corresponding to the phase to be adjusted by utilizing the obtained adjusting strategy of the signal control scheme.

In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus;

a memory for storing a computer program;

a processor, configured to implement the steps of any method for determining an adjustment strategy for a signal control scheme provided in the first aspect when executing a program stored in a memory.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program, when executed by a processor, implements the steps of any method for determining an adjustment policy for a signal control scheme provided in the first aspect.

In a fifth aspect, an embodiment of the present invention provides a computer program product containing instructions, which when run on a computer, causes the computer to perform any of the steps of the method for determining an adjustment strategy for a signaling control scheme provided in the first aspect.

The embodiment of the invention has the following beneficial effects:

by applying the scheme provided by the embodiment of the invention, when a specified intersection enters each preset adjusting period, the green light utilization rate of each phase of the intersection can be calculated by using the vehicle passing data of a plurality of signal periods of the intersection between the current time, wherein the control mode of the traffic control signal of the specified intersection is the same as the control mode of the traffic control signal of the specified intersection at the current time in the plurality of signal periods. Therefore, when a first phase with the green light utilization rate smaller than the preset utilization rate exists, the phase to be adjusted of the intersection can be determined, the phase duration to be set in the determined phase to be adjusted in the current adjustment period which is about to enter is determined according to the current phase duration of the first phase, and therefore the adjustment strategy of the signal control scheme of the specified intersection can be obtained.

Based on the scheme provided by the embodiment of the invention, the calculated green light utilization rate can reflect the matching degree of the phase duration of each phase of the specified intersection and the vehicle quantity of the intersection. And when the first phase exists, determining the phase to be adjusted in each phase at the appointed intersection, and determining the phase duration to be set of the phase to be adjusted in the current adjustment period to be entered, so as to obtain the adjustment strategy of the signal control scheme at the appointed intersection. Furthermore, when the phase duration of the phase to be adjusted at the specified intersection is adjusted according to the adjustment strategy of the determined signal control scheme, the matching degree of the phase duration of each phase adjusted at the specified intersection and the traffic flow of the specified intersection can be improved. Therefore, by applying the scheme provided by the embodiment of the invention, effective adjustment basis on the phase duration can be provided for improving the matching degree of the phase duration of each phase of the intersection and the traffic flow of the intersection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an L-shaped intersection;

FIG. 2 is a schematic view of a T-junction;

fig. 3 is a flowchart illustrating a method for determining an adjustment strategy of a signal control scheme according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for determining an adjustment strategy of a signal control scheme according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In order to solve the above technical problem, an embodiment of the present invention provides a method for determining an adjustment strategy of a signal control scheme.

The method for determining the adjustment strategy of the signal control scheme can be applied to a scene of adjusting the phase duration of any road intersection provided with the traffic control signal. For example, an L-shaped intersection, a T-shaped intersection, etc.

The method for determining the adjustment strategy of the signal control scheme may be applied to any electronic device, for example, the electronic device may be a control device for a traffic control signal at a road intersection, so that after the scheme provided by the embodiment of the present invention is executed, the control device may directly adjust the duration of the green light control signal corresponding to the phase to be adjusted by using the adjustment strategy of the determined signal control scheme, and control the traffic control signal at the road intersection by using the adjusted signal control scheme, and for example, the electronic device is another electronic device except the control device, and after the scheme provided by the embodiment of the present invention is executed, the electronic device may send the adjustment strategy of the determined signal control scheme to the control device, so that after the control device receives the adjustment strategy of the signal control scheme, the duration of the green light control signal corresponding to the phase to be adjusted is adjusted by using the adjustment strategy of the signal control scheme, and further control the traffic control signal at the road intersection by using the adjusted signal control scheme.

Based on this, the embodiment of the present invention does not specifically limit an application scenario of the method for determining an adjustment strategy related to a signal control scheme and an electronic device applying the method for determining an adjustment strategy related to a signal control scheme. For the sake of clarity, the execution subjects that execute the determination method regarding the adjustment strategy of the signal control scheme will be collectively referred to as electronic devices in the following.

The method for determining an adjustment strategy for a signal control scheme according to the embodiments of the present invention may include the following steps:

if a target utilization rate smaller than a preset utilization rate exists in the calculated green light utilization rate, determining a phase to be adjusted; wherein, the lane that the phase place corresponds of treating to adjust includes at least: the lane corresponding to the first phase with the target utilization rate;

Therefore, by applying the scheme provided by the embodiment of the invention, the calculated green light utilization rate can reflect the matching degree of the phase duration of each phase of the specified intersection and the vehicle quantity of the intersection. And when the first phase exists, the phase to be adjusted in each phase at the appointed intersection can be determined, and the phase duration to be set of the phase to be adjusted in the current adjustment period to be entered is determined, so that the adjustment strategy of the signal control scheme at the appointed intersection is obtained. Furthermore, when the phase duration of the phase to be adjusted at the designated intersection is adjusted according to the adjustment strategy of the determined signal control scheme, the matching degree between the phase duration of each adjusted phase at the designated intersection and the traffic flow at the designated intersection can be improved. Therefore, by applying the scheme provided by the embodiment of the invention, effective adjustment basis on the phase duration can be provided for improving the matching degree of the phase duration of each phase of the intersection and the traffic flow of the intersection.

In order to better understand the phase of the intersection involved in the embodiment of the present invention, first, the phase of the L-shaped intersection and the phase of the T-shaped intersection are described below by taking the L-shaped intersection and the T-shaped intersection as examples.

Fig. 1 is a schematic diagram of an L-shaped intersection. The L-shaped intersection may have two entrance ports, so that two lines, namely, line 1 and line 2, may be provided, and the vehicle may pass through the L-shaped intersection through the line 1 or the line 2, and each of the line 1 and the line 2 may correspond to at least one lane.

When the right of way 1 and the right of way 2 can be obtained at the same time, that is, vehicles running in different directions can exist in the L-shaped intersection at the same time, then the way 1 and the way 2 can be considered to jointly form a phase of the L-shaped intersection, and at this time, the L-shaped intersection has a phase;

when the right to pass cannot be simultaneously obtained by the line 1 and the line 2, that is, when only vehicles traveling in the same direction can exist at the same time, the line 1 and the line 2 are considered to respectively constitute one phase of the L-shaped intersection, and the L-shaped intersection has two phases.

Further, it is understood that when the lane in the L-intersection is a one-way road, then the L-intersection can only have the line 1 or the line 2 shown in fig. 1, and then the L-intersection where the lane is a one-way road has one phase, and the one-way road can be the line 1 or the line 2 shown in fig. 1.

Fig. 2 is a schematic diagram of a T-shaped intersection. The T-shaped intersection can be provided with three entrance ports, so that six routes a-f can be provided, vehicles can pass through the T-shaped intersection through any one of the routes a-f, and each of the routes a-f can correspond to at least one lane.

When the lines a-f cannot simultaneously obtain the right of way, the lines a-f can be considered to respectively form a phase of the T-shaped intersection, and the T-shaped intersection can have 6 phases.

Wherein, phase a and phase b are respectively: two straight-going phases of a transverse road at the T-shaped intersection are as follows, wherein the phases c and d are respectively as follows: the phase e and the phase f of the transverse road turning left from the longitudinal road of the T-shaped intersection to the T-shaped intersection and the phase of the longitudinal road turning left from the transverse road of the T-shaped intersection to the T-shaped intersection are respectively as follows: the phase of the transverse road turning right from the longitudinal road of the T-shaped intersection to the T-shaped intersection and the phase of the longitudinal road turning right from the transverse road of the T-shaped intersection to the T-shaped intersection.

Obviously, the phase a and the phase b can be called as a straight-going phase of the T-shaped intersection, the phase c and the phase d can be called as two left-turning phases of the T-shaped intersection, and the phase e and the phase f can be called as two right-turning phases of the T-shaped intersection.

In addition, for convenience of the following description of a method for determining an adjustment strategy of a signal control scheme provided in the embodiment of the present invention, the phases a-d may be referred to as 4 standard phases of a T-shaped intersection.

Wherein, the phase B generates weak conflict with the phase c and the phase d respectively, as shown in fig. 2, the dot a and the dot B are weak conflict points generated by the phase B and the phase d and the phase c respectively; the phase C and the phase d generate strong conflict, and as shown in fig. 2, the dot C is a strong conflict point generated by the phase C and the phase d.

Optionally, in an embodiment, the strength conflict generated between the phases is divided according to an included angle between driving tracks formed when the vehicle drives in lanes included in each phase. When the included angle is close to 90 degrees, the strength conflict generated between the phases is a strength conflict, otherwise, the strength conflict generated between the phases is a strength conflict.

Further, alternatively, in one embodiment, phase a and phase b may be referred to as symmetric phases; the phase a and the phase c, the phase a and the phase d, the phase b and the phase f, and the phase c and the phase e can be called as the same entrance phase; phase c and phase d may be referred to as strong collision phases.

In addition, in this embodiment, the passing directions of the phase b and the phase f into the T-shaped intersection are the same, and the phase f is a right-turn phase, so the straight phase b may also be referred to as a homodromous phase of the right-turn phase f; in addition, the passing directions of the phase c and the phase e entering the T-shaped intersection are the same, so the left-turn phase c can also be called the same-direction phase of the right-turn phase e.

Furthermore, it is understood that in an actual road scene, there may be lines that simultaneously take right of way in the lines a-f, and then the lines that simultaneously take right of way may be considered to collectively constitute a phase of the T-junction, in which case the T-junction may have a number of phases that is less than 6.

For example, line a and line b may take right of way simultaneously, and then line a and line b together constitute a phase of the T-junction, which may be identified as phase ab; for another example, line a and line c may both gain right of way, and then line a and line c together constitute a phase at the T-junction, which may be identified as phase ac; as another example, line a, line b, and line c may all take right of way at the same time, and then line a, line b, and line c together form a phase at the T-junction, which may be identified as phase abc.

It should be noted that, for a T-shaped intersection, the lateral channels of the T-shaped intersection are: when the vehicle passes through the T-shaped intersection in a straight-through manner, the lane is located.

For example, as shown in FIG. 2, the path in which line a and line b are located may be referred to as a lateral path of a T-junction. That is, although in fig. 2, the straight passage where the line a and the line b are located is drawn longitudinally, the passage is a lateral passage of a T-junction;

correspondingly, the longitudinal channel of the T-shaped intersection is as follows: and in the two channels of the T-shaped intersection, the other channel except the transverse channel is arranged. A vehicle located in a longitudinal aisle, which cannot travel straight through a T-junction, needs to be diverted from the longitudinal aisle into a lateral aisle, and then driven away from the T-junction from the lateral aisle, e.g., as shown in fig. 2, route c and route e; alternatively, it may be necessary to divert from a lateral aisle into a longitudinal aisle and then drive from the longitudinal aisle away from the T-junction, for example, as shown in fig. 2, route d and route f. That is, in fig. 2, the longitudinal lanes of the T-intersection are drawn laterally.

The following describes a method for determining an adjustment strategy of a signal control scheme according to an embodiment of the present invention in detail

Fig. 3 is a flowchart illustrating a method for determining an adjustment strategy of a signal control scheme according to an embodiment of the present invention. As shown in fig. 3, the method for determining the adjustment strategy of the signal control scheme may include the following steps:

s301: when entering each preset adjusting period, acquiring vehicle passing data of a plurality of signal periods before the current moment of the appointed intersection;

in the multiple signal periods, the signal control scheme of the traffic control signal of the appointed intersection is the same as the signal control scheme of the traffic control signal of the appointed intersection at the current moment;

when one preset adjusting period is finished, namely the next preset adjusting period is about to enter, the electronic equipment can acquire the vehicle passing data of a plurality of signal periods before the current time of the appointed intersection.

It should be noted that, in order to ensure the accuracy of determining the phase duration, when the vehicle traffic data of the multiple signal periods is acquired, in the multiple signal periods, the signal control scheme of the traffic control signal at the designated intersection needs to be the same as the signal control scheme of the traffic control signal at the designated intersection at the current time. That is, the signal control scheme of the traffic control signal at the specified intersection corresponding to the acquired plurality of pieces of vehicle traffic data is the same as the signal control scheme of the traffic control signal at the specified intersection at the current time.

The electronic equipment can acquire vehicle passing data of all signal periods in an adjusting period taking the current time as an end time; for example, if 24 hours is used as an adjustment period and the current time is 20/5/2020, the electronic device may obtain vehicle traffic data for all signal periods between 19/2020 and 24/24.

The electronic device may also randomly acquire vehicle passage data of a plurality of signal periods in all signal periods of one adjustment period with the current time as an end time; for example, if 24 hours is used as an adjustment period and the current time is 20/5/2020, the electronic device may randomly determine a plurality of signal periods from all signal periods between 19/2020 and 24, and further acquire vehicle passage data of the determined plurality of signal periods.

The electronic device may further divide one adjustment cycle having the current time as an end time into a plurality of time segments, thereby acquiring vehicle communication data of a plurality of signal cycles within a specified time period of each time segment. For example, with a week as an adjustment period and each signal period divided into 7 time slices by day, if the current time is 20 am of 5/2020, the electronic device may obtain vehicle passage data of a plurality of signal periods between 13 am of 5/2020 to 19 am of 5/2020 and nine am of every day.

Of course, on the premise of ensuring that the signal control scheme of the traffic control signal at the designated intersection is the same as the signal control scheme of the traffic control signal at the designated intersection at the current time, the vehicle traffic data of the plurality of signal periods acquired by the electronic device may also be the vehicle traffic data of the signal period in a plurality of adjustment periods before the current time, which is not specifically limited in the embodiment of the present invention.

In addition, the vehicle traffic data acquired by the electronic device may include data for calculating the green light utilization rate of each phase at the designated intersection. For example, the lane flow of each lane, the duration of the green light control signal of each lane, the saturated headway of each lane, and the like. In this regard, the embodiments of the present invention are not limited to the specific embodiments.

S302: calculating the green light utilization rate of each phase of the appointed intersection by using the vehicle passing data;

after the vehicle passing data of the multiple signal periods are obtained, the electronic equipment can calculate the green light utilization rate of each phase of the specified intersection by using the vehicle passing data.

Optionally, in a specific implementation manner, for each phase of the designated intersection, the electronic device may first calculate a green light utilization rate of the phase in each signal period by using the acquired vehicle traffic data, and further calculate an average value of the green light utilization rate in each signal period. Thus, the calculated average can be determined as the green light utilization for that phase.

Optionally, in an embodiment, the electronic device may calculate the green light utilization rate of each phase in each signal period by using the following formula:

α _ij ＝s _ij ×w _ij /T _Gij

wherein alpha is _ij For the green light utilization, s, of phase i in signal period j _ij For the saturated headway, w, of the lane corresponding to phase i in signal cycle j _ij The lane flow, T, of the lane corresponding to the phase i in the signal cycle j _Gij The duration of the green light control signal in the phase duration of the phase i in the signal period j.

S303: if the calculated green light utilization rate has a target utilization rate smaller than a preset utilization rate, determining a phase to be adjusted;

wherein, wait to include at least in the lane that the phase place corresponds: a lane corresponding to a first phase having a target utilization rate;

after the green light utilization rate of each phase of the specified intersection is obtained through calculation, the electronic equipment can judge the size relation between each green light utilization rate obtained through calculation and the preset utilization rate.

Obviously, if the calculated green light utilization rate of a certain phase is less than the preset utilization rate, it indicates that, in each signal cycle, when the phase takes the right to pass, the proportion of the time required by the vehicle to pass through the intersection from the phase to the time of the green light control signal in the time duration of the phase is small.

That is, in the duration of the green light control signal, only a few vehicles pass through the intersection, and more green light durations are left unused and not utilized. Even, an empty situation may occur. Thus, it can be determined that the phase duration of the phase does not match the traffic flow at the intersection.

Wherein, the free space means: when the phase acquires the right of way, no vehicle passes through the intersection from the phase.

Therefore, if the calculated green light utilization rate has a target utilization rate smaller than the preset utilization rate, the electronic equipment can determine that the phase duration of the first phase with the target utilization rate is not matched with the traffic flow of the road intersection in each phase of the specified intersection at the current moment.

Therefore, in order to improve the utilization rate of the green light of the first phase and solve the problem that the duration of the existing phase is not matched with the traffic flow at the intersection, the electronic equipment can determine the phase to be adjusted.

Wherein, should wait to adjust the lane that the phase place corresponds in including at least: the lane corresponding to the first phase with the target utilization rate. That is to say, the phase to be adjusted may be the first phase or a phase formed by the first phase and other phases. This is all reasonable.

It should be noted that, for the designated intersections of different types and the designated intersections of the same type having different phases, the electronic device may determine the phase to be adjusted in multiple ways, which is not specifically limited in the embodiment of the present invention. For clarity, the specific manner in which the electronic device determines the phase to be adjusted in different situations will be illustrated later.

S304: determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase to obtain an adjustment strategy of a signal control scheme of the specified intersection;

after the phase to be adjusted is determined, the electronic device may determine the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase, and then, the electronic device may determine an adjustment strategy for the phase duration of each phase to be adjusted at the specified intersection in the current adjustment period to be entered, that is, the electronic device may obtain the adjustment strategy for the signal control scheme at the specified intersection.

It should be noted that, for different types of designated intersections and designated intersections of the same type having different phases, the phases to be adjusted determined by the electronic device may be different, and for different phases to be adjusted, the electronic device may execute the step S304 in multiple ways to obtain adjustment strategies of different signal control schemes. The embodiment of the present invention is not particularly limited. For clarity, the electronic device will hereinafter perform the step S304 in different cases.

After the adjustment strategy of the signal control scheme of the specified intersection is obtained, the electronic equipment can send the adjustment strategy of the signal control scheme to the control scheme adjustment system, so that an effective adjustment basis about phase duration is provided for the control scheme adjustment system, and the matching degree between the phase duration of each phase of the intersection and the traffic flow of the intersection is improved.

Therefore, by applying the scheme provided by the embodiment of the invention, the calculated green light utilization rate can reflect the matching degree of the phase duration of each phase of the specified intersection and the vehicle quantity of the intersection. And when the first phase exists, the phase to be adjusted in each phase at the appointed intersection can be determined, and the phase duration to be set of the phase to be adjusted in the current adjustment period to be entered is determined, so that the adjustment strategy of the signal control scheme at the appointed intersection is obtained. Furthermore, when the phase duration of the phase to be adjusted at the specified intersection is adjusted according to the adjustment strategy of the determined signal control scheme, the matching degree of the phase duration of each phase adjusted at the specified intersection and the traffic flow of the specified intersection can be improved. Therefore, by applying the scheme provided by the embodiment of the invention, effective adjustment basis on the phase duration can be provided for improving the matching degree of the phase duration of each phase of the intersection and the traffic flow of the intersection.

Optionally, in a specific implementation manner, the method for determining an adjustment policy for a signal control scheme provided in the embodiment of the present invention may further include the following steps:

After the adjustment strategy of the signal control scheme of the specified intersection is determined, the electronic device can directly adjust the duration of the green light control signal corresponding to the phase to be adjusted by using the duration of the phase to be set of the determined phase to be adjusted.

And then, after the duration of the green light control signal corresponding to the phase to be adjusted is adjusted, in the current adjustment period, when the green light control signal corresponding to the phase to be adjusted is controlled, the control can be performed according to the duration of the adjusted green light control signal, and further, in the current adjustment period, the green light control signal of the specified intersection is controlled according to the duration of the adjusted green light control signal.

Therefore, the periodic adjustment of the signal control scheme of the traffic control signal of the specified intersection can be realized, the adjustment is based on the calculated green light utilization rate of each phase of the specified intersection, and the green light utilization rate can reflect the matching degree of the phase duration of each phase of the specified intersection and the vehicle quantity of the intersection. Therefore, the matching degree of the phase duration of each phase of the designated intersection and the traffic flow of the intersection in the current adjustment period can be improved, and the problem that the phase duration of each phase of the intersection is not matched with the traffic flow of the intersection is solved.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection or a T-shaped intersection,

then, in step S303, determining the phase to be adjusted may include the following steps:

step 11: determining the first phase as a phase to be adjusted;

accordingly, in this specific implementation manner, in the step S304, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase may include the following steps:

step 12: and determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light.

In this specific implementation manner, when the electronic device determines that the calculated green light utilization rate is less than the preset utilization rate, the electronic device may directly determine the first phase having the target utilization rate as the phase to be adjusted. Furthermore, the electronic device may determine a phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light.

Optionally, in an embodiment, the step S12 may include the following steps:

determining the phase duration to be set of the phase to be adjusted in the current adjustment period by using a preset formula; wherein, the preset formula is as follows:

T＝t-(1-α)*T _G

wherein, T is the time length of the phase to be adjusted in the current adjustment period, T is the current phase time length of the first phase, α is the calculated utilization rate of the green light of the first phase, and T is the calculated utilization rate of the green light of the first phase _G Comprises the following steps: in the current phase time length of the first phase, the time length of the green light control signal corresponding to the first phase.

Obviously, in this embodiment, the duration of the green light control signal corresponding to the first phase may be shortened, thereby improving the utilization rate of the green light at the phase.

Optionally, in a specific implementation, when the designated intersection is an L-shaped intersection, the determining the phase to be adjusted in step S303 may include the following steps:

step 21: if the total number of the phases at the appointed intersection and the number of the first phases are both 1, determining the phase at the appointed intersection as a phase to be adjusted;

step 22: otherwise, combining all phases of the specified intersection, and determining the combined phases as the phases to be adjusted.

According to the above description of the L-shaped intersection shown in fig. 1, the L-shaped intersection may have one phase or two phases, so that the electronic device may determine the phases to be adjusted in different ways for L-shaped intersections having different numbers of phases.

When the target utilization rate smaller than the preset utilization rate exists in the calculated green light utilization rates, the electronic equipment can further determine the total number of the phases of the specified intersection and the number of the first phases of which the green light utilization rates are smaller than the preset utilization rate, so that the phases to be adjusted are determined in different modes according to the determined total number of the phases and the number of the first phases.

If the total number of the phases at the specified intersection and the number of the first phases are both 1, the electronic equipment can determine the first phases as the phases to be adjusted;

otherwise, the electronic device may combine the phases at the designated intersection, and determine the combined phase as the phase to be adjusted.

According to the characteristics of the L-shaped intersection, except for the condition that the total number of the phases and the number of the first phases are both 1, the total number of the phases and the number of the first phases at the specified intersection can also have other two conditions according to the L-shaped intersection.

Case 1: the total number of phases and the number of first phases at the appointed intersection are both 2;

case 2: the total number of phases at a given intersection is 2 and the number of first phases is 1.

In both cases, the electronic device may combine the two phases at the specified intersection to obtain a combined phase, and then the electronic device may determine the combined phase as the phase to be adjusted.

Further, on the basis of the present specific implementation manner, optionally, in a specific implementation manner, in the step S304, determining a phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase, may include the following steps:

step 23: if the total number of the phases of the specified intersection and the number of the first phases are both 1, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phases and the utilization rate of green lights;

under the condition that the total number of the phases at the specified intersection and the number of the first phases are both 1, the electronic equipment can directly determine the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration and the green light utilization rate of the first phases.

Optionally, in an embodiment, the electronic device may determine, by using a preset formula in the above description, a phase duration to be set of the phase to be adjusted in the current adjustment period.

Step 24: if the total number of the phases at the appointed intersection is judged to be 2 and the number of the first phases is judged to be 1, determining the maximum value in the current phase duration of each phase at the appointed intersection as the phase duration of the phase to be adjusted;

under the condition that the total number of phases at the specified intersection is 2 and the number of the first phases is 1, the electronic equipment can determine the magnitude relation of the current phase duration of each phase in the two phases at the specified intersection, so that the maximum value of the two current phase durations is determined as the phase duration of the phase to be adjusted.

Step 25: and if the total number of the phases and the number of the first phases at the appointed intersection are both 2, determining the phase duration of the phase to be adjusted based on the current phase duration and the green light utilization rate of any phase in each phase at the appointed intersection.

Under the condition that the total number of the phases and the number of the first phases at the appointed intersection are both 2, the electronic equipment can select any phase from the two phases at the appointed intersection, and accordingly, the phase duration of the phase to be adjusted is determined based on the current phase duration and the green light utilization rate of the selected phase.

Accordingly, in this embodiment, T in the above-mentioned preset formula is the current phase duration of the selected phase, α is the calculated utilization rate of green light of the selected phase, and T is _G And selecting the duration of the corresponding green light control signal from the current phase duration of the selected phase.

The electronic device may select a phase used for determining a phase duration of the phase to be adjusted from the two phases at the designated intersection in a plurality of ways. The embodiment of the present invention is not particularly limited.

For example, the electronic device may randomly select a phase from two phases at the designated intersection, and further determine the phase duration of the phase to be adjusted by using the current phase duration and the green light utilization rate of the randomly selected phase;

for another example, the electronic device may determine a size relationship between a current phase duration of each phase in two phases at the designated intersection, thereby determining a phase in which the current phase duration is a maximum value of the two phase durations, and further determining a phase duration of the phase to be adjusted by using the current phase duration of the determined phase and a green light utilization rate.

For another example, the electronic device may determine a magnitude relationship of a green light utilization rate of each phase in two phases of the specified intersection, thereby determining a phase in which the green light utilization rate is the maximum value of the two green light utilization rates, and further determining the phase duration of the phase to be adjusted by using the current phase duration and the green light utilization rate of the determined phase.

Optionally, in a specific implementation manner, when the designated intersection is a T-shaped intersection, in the step S303, determining the phase to be adjusted may include the following steps:

step 31: for each first phase in the first phases, determining a second phase in the designated intersection based on the type of the first phase;

wherein the second phase is: the phase which can be combined with the first phase in the candidate phases is as follows: appointing other phases except all the first phases in all the phases at the intersection;

it can be understood that for a T-shaped intersection, there may be a plurality of phases, and then, after the green light utilization rate of each phase is calculated, there may be a plurality of target utilization rates smaller than the preset utilization rate in the plurality of green light utilization rates, that is, for a T-shaped intersection, there may be a plurality of first phases.

Also, according to the above description of the T-junction shown in fig. 2, there is a standard phase that can be combined with other standard phases and/or right turn phases for the T-junction.

Based on this, for a T-shaped intersection, when it is determined that there is a target utilization rate smaller than a preset utilization rate in the calculated green light utilization rates, for each first phase, the electronic device may first determine a type of the first phase. Furthermore, the electronic device may determine whether there is a second phase that can be combined with the first phase among the phases at the specified intersection, that is, the candidate phases, among the phases other than all the first phases, based on the type of the first phase.

Wherein when there are multiple first phases, the electronic device can determine, for each first phase in turn, a second phase of the first phase based on the type of the first phase.

The order of determining the second phase for each first phase by the electronic device may be random, or may be determined according to the order priority corresponding to the type of each preset first phase.

For example, the order priority may be: the corresponding lane comprises the lane corresponding to the right-turn phase, the priority of the phase of the lane corresponding to the right-turn phase is the highest, the corresponding lane does not comprise the lane corresponding to the right-turn phase, the priority of the phase of the lane corresponding to the straight-going phase is the second priority, and the priority of the left-turn phase is the lowest.

Of course, the electronic device may also determine the order of determining the second phase for each first phase in other ways; moreover, when the electronic device determines the order of determining the second phase for each first phase according to the order priority corresponding to the type of each preset first phase, multiple order priorities may also be adopted. In this regard, the embodiments of the present invention are not particularly limited.

Optionally, in an embodiment, in the step 31, determining the second phase of the first phase based on the type of the first phase may include the following steps:

step 311: if the first phase is the right turn phase of the T-shaped intersection, determining the homodromous phase of the right turn phase in the T-shaped intersection as the second phase of the first phase;

the passing direction of the same-direction phase of the right-turn phase entering the T-shaped intersection is the same as the passing direction of the right-turn phase entering the T-shaped intersection;

if the first phase is a right-turn phase, the electronic device may determine a phase in the same direction as the right-turn phase at the T-intersection as a second phase of the first phase, and the right-turn phase and the phase in the same direction may be combined.

For example, as shown in fig. 2, when the right-hand phase e is the first phase, the left-hand phase c can be determined to be the second phase of the right-hand phase e; accordingly, when the right-hand phase f is the first phase, the straight phase b can be determined as the second phase of the right-hand phase f.

Optionally, if the first phase is a right-turn phase at a T-shaped intersection, the lane corresponding to the first phase may only include the lane corresponding to the right-turn phase, and the lane corresponding to the standard phase and the other right-turn phase are not included. That is, in this case, if the first phase is a phase in which a right-turn phase and another phase are combined, the first phase may be determined as a non-right-turn phase.

Of course, optionally, if the first phase is a right turn phase of the T-shaped intersection, the lane corresponding to the first phase may at least include the lane corresponding to the right turn phase. That is, in this case, if the first phase is a phase in which a right-turn phase is combined with another phase, the first phase may be determined as the right-turn phase.

In addition, optionally, when the same-direction phase of the right-turn lane is combined with other standard phases into the same phase in each phase of the T-shaped intersection, the combined same phase may be determined as the second phase of the right-turn phase. That is, if the first phase is a right turn phase of the T-shaped intersection, a phase of a lane corresponding to a same-direction phase of the T-shaped intersection, which includes the right turn phase, may be determined as a second phase of the first phase.

Step 312: and if the first phase is a non-right-turn phase at the T-shaped intersection, determining a second phase of the first phase from the candidate phases based on a preset priority combination rule.

Accordingly, if the first phase is a non-right-turning phase, the electronic device may determine a second phase of the first phase from candidate phases based on a preset preferential combination rule, and the non-right-turning phase and the second phase may be combined.

For example, as shown in fig. 2, when the straight-line phase a is the first phase, based on a preset priority combination rule, the straight-line phase b may be determined to be the second phase of the straight-line phase a; for another example, when the straight phase a is the first phase, the left-turn phase c may be determined to be the second phase of the straight phase a based on a preset priority combination rule.

Optionally, in an embodiment, 4 standard phases exist at the T-shaped intersection, where the 4 standard phases include: two straight going phases and two left-turn phases of a transverse road at a T-shaped intersection, wherein the two left-turn phases are as follows: the phase of a longitudinal road turning from the transverse road to the T-shaped intersection from the left side and the phase of a longitudinal road turning from the longitudinal road to the transverse road from the left side;

accordingly, in this embodiment, in the step 312, determining the second phase of the first phase from the candidate phases based on the preset preferential combining rule may include the following steps:

step 1: determining standard phase combination information of each phase of the appointed intersection;

the standard phase combination information of each phase is used for representing whether the phase is obtained by combining a plurality of standard phases or not, and when the phase is obtained by combining a plurality of standard phases, a plurality of standard phases of the phase are obtained by combining;

and 2, step: and determining a second phase of the first phase from the candidate phases based on the determined standard phase combination information of each phase and a preset priority combination rule.

In this embodiment, if the first phase is a non-right-turn phase, the electronic device may determine standard phase combination information of each phase at the designated intersection.

Furthermore, since the standard phase combination information of each phase is used to indicate whether the phase is obtained by combining a plurality of standard phases, and when the phase is obtained by combining a plurality of standard phases, the plurality of standard phases of the phase are combined, the electronic device may determine the second phase of the first phase from the candidate phases according to the determined standard phase combination information of each phase and a preset preferential combination rule.

It should be noted that, in the embodiments of the present invention, specific contents of the priority merge rule are not limited.

Optionally, in an embodiment, the priority combining rule may be:

the corresponding lanes respectively comprise lanes corresponding to different phases in the same access port phase and do not comprise the combination priority of two behaviors of the lanes corresponding to different phases in the strong conflict phase;

the corresponding lanes respectively comprise two behaviors of the lanes corresponding to different phases in the strong conflict phases, and the two behaviors are not combined;

wherein, the two straight-line phases are symmetrical phases; any left-turn phase and the target same-direction passing phase are the same entrance phase, and the target same-direction passing phase is as follows: the passing direction in the cross lane or the longitudinal lane is the same phase as the passing direction in the cross lane or the longitudinal lane of the left-turn phase; the two left-turn phases are strong collision phases.

It should be noted that, when a plurality of standard phases are merged at a T-shaped intersection, and then when a relationship between the merged phases is determined, for each two merged phases, it is preferentially determined whether lanes corresponding to the two merged phases respectively include lanes corresponding to different phases in a strong collision phase, and further, when the determination result is no, it is continuously determined whether lanes corresponding to the two merged phases respectively include lanes corresponding to different phases in a symmetric phase, and then, when the determination result is no, it is continuously determined whether lanes corresponding to the two merged phases respectively include lanes corresponding to different phases in the same intersection phase.

For example, as shown in fig. 2, when there are six phases at a T-junction, the straight phase a and the straight phase b are symmetric phases, the straight phase a and the left-turn phase c are the same entrance phase, the straight phase a and the left-turn phase d are the same entrance phase, and the left-turn phase c and the left-turn phase d are strong collision phases.

For another example, when the straight phase a and the left-turn phase c at the T-intersection are combined into the same phase, the lane corresponding to the combined phase includes the lane corresponding to the straight phase a, and the straight phase a and the straight phase b are symmetric phases.

Step 32: determining phases to be adjusted based on the number of the first phases and a second phase determination result of each first phase;

wherein the second phase determination result for each first phase is: for characterizing the result of whether the second phase is determined among the candidate phases.

After obtaining the second phase determination result of each first phase, that is, for each first phase, determining whether the second phase of the first phase exists in the candidate phases, and when determining that the second phase exists, specifically which phase the second phase exists, the electronic device may determine the phase to be adjusted based on the number of the first phases and the second phase determination result of each first phase.

Optionally, in an embodiment, the step 32 of determining the phase to be adjusted based on the number of the first phases and the second phase determination result of each first phase may include the following steps:

step 321: when the number of the first phases is 1, if the second phase is determined, combining the first phases and the second phase, and determining the combined phase as the phase to be adjusted;

step 322: when the number of the first phases is 1, if the second phase is not determined, the first phase is determined as the phase to be adjusted.

Thus, if the number of the determined first phases is 1 and the second phase is determined based on the type of the first phase in step S303, the electronic device may combine the first phase and the second phase, and further, may determine the combined phase as the phase to be adjusted.

Accordingly, if the number of the determined first phases is 1 and the second phase is not determined based on the type of the first phase in step S303, the electronic device may determine that there is no second phase that can be combined with the first phase in the candidate phases at the designated intersection, and then the electronic device may directly determine the first phase as the phase to be adjusted.

In addition, optionally, in another embodiment, the step 32 of determining the phase to be adjusted based on the number of the first phases and the second phase determination result of each first phase may include the following steps:

step 323: when the number of the first phases is multiple, at least one first phase is selected from the first phases;

step 324: aiming at each selected first phase, if a second phase is determined, combining the first phase and the second phase, and determining the combined phase as a phase to be adjusted; and if the second phase is not determined, determining the first phase as the phase to be adjusted.

Thus, if the number of the determined first phases is plural in step S303, the electronic device may select at least one first phase from the plural determined first phases. Thus, the phase to be adjusted is determined based on the second phase determination result of the selected at least one first phase.

The electronic device may select only one first phase, or may select more than one first phases less than all of the first phases, or may select all of the first phases. This is all reasonable.

Furthermore, it is reasonable that the electronic device may randomly select the at least one first phase, or may select the at least one first phase according to a certain rule, for example, select each first phase that determines the second phase, for example, select each first phase that does not determine the second phase, and for example, select the same number of first phases that determine the second phase and first phases that do not determine the second phase.

Obviously, when the phase to be adjusted can be determined by combining a certain first phase and the second phase of the first phase, or directly determining a certain first phase as the phase to be adjusted, the electronic device may determine the phase to be adjusted only by means of phase combination, may determine the phase to be adjusted only by means of direct determination, or may determine the phase to be adjusted by means of both of the foregoing manners.

Further, on the basis of the specific implementation manner shown in the foregoing step 31 to step 32, optionally, in a specific implementation manner, in the foregoing step S304, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase, may include the following steps 41 to 42:

step 41: if the second phase is determined, determining the phase duration to be set of the phase to be adjusted in the current adjustment period from the current phase durations of the first phase and the second phase;

if in step S303, the number of the determined first phases is 1, and the second phase is determined based on the type of the first phase, the electronic device may combine the first phase and the second phase, and determine the combined phase as the phase to be adjusted, and further, the electronic device may determine the phase duration to be set of the phase to be adjusted in the current adjustment period from the current phase durations of the first phase and the determined second phase.

In addition, if in the step S303, the determined number of the first phases is multiple, and the second phase is determined based on the type of the first phase for the selected one first phase, the electronic device may combine the first phase and the second phase, and determine the combined phase as the phase to be adjusted, and further, the electronic device may determine the phase duration to be set of the phase to be adjusted in the current adjustment period from the current phase durations of the first phase and the determined second phase.

That is to say, for each selected first phase, the electronic device may select a current phase duration from the current phase durations of the first phase and the determined second phase, and determine the selected current phase duration as a phase duration to be set of the combined phase to be adjusted in the current adjustment period, that is, as a phase duration of the combined phase of the first phase and the second phase.

The electronic device may select, in multiple ways, a current phase duration used for determining a to-be-set phase duration of the to-be-adjusted phase in the current adjustment period from the current phase durations of the first phase and the second phase. The embodiment of the present invention is not particularly limited.

Optionally, in an embodiment, the step 41 may include the following steps 411 to 412:

step 411: if the first phase is the right turn phase of the T-shaped intersection, determining the current phase duration of the second phase as the phase duration to be set of the phase to be adjusted in the current adjustment period;

step 412: and if the first phase is a non-right-turn phase of the T-shaped intersection, determining the maximum value of the current phase time length of the first phase and the current phase time length of the second phase as the phase time length to be set of the phase to be adjusted in the current adjustment period.

If the first phase is a right-turn phase, and the determined second phase is a same-direction phase of the right-turn phase at a T-shaped intersection, the electronic device may determine the current phase duration of the determined second phase as a to-be-set phase duration of the to-be-adjusted phase in the current adjustment period, that is, the current phase duration of the same-direction phase of the right-turn phase is determined as a to-be-set phase duration of the to-be-adjusted phase in the current adjustment period, that is, the phase duration of the phase in which the first phase and the second phase are combined is determined.

Correspondingly, if the first phase is a non-right-turn phase, the electronic device may first determine a magnitude relationship between a current phase duration of the first phase and a current phase duration of the second phase, and thereby determine a maximum value of the two current phase durations as a phase duration to be set of the phase to be adjusted in a current adjustment period, that is, a phase duration of a phase obtained by combining the first phase and the second phase.

Optionally, if the first phase is a right-turn phase of the T-shaped intersection, the lane corresponding to the first phase may only include a lane corresponding to the right-turn phase, and the lane corresponding to the standard phase and the other right-turn phase are not included. That is, in this case, if the first phase is a phase in which a right-turn phase and another phase are combined, the first phase is determined as a non-right-turn phase.

Step 42: and if the second phase is not determined, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light.

Correspondingly, if the second phase is not determined in the candidate phases of the designated intersection for the first phase, the electronic device may determine the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of green light.

Optionally, if the second phase is not determined in the candidate phases at the designated intersection for the first phase, the electronic device may determine the phase duration to be set of the phase to be adjusted in the current adjustment period by using a preset formula in the above description.

Further, optionally, for the case that the number of the determined first phases is multiple in the step S303, in the at least one selected first phase, there may be a third phase which forms a symmetric phase and the same entrance phase with the two first phases, respectively, that is, the electronic device may determine the same second phase for the two first phases at the same time.

Based on this, in one case: the electronic device may determine the second phase only as the second phase of any of the two first phases.

Alternatively, if there is no strong conflict phase in the two first phases and the determined second phase, the two first phases and the determined second phase may be combined together for three phases.

In the second case, the maximum value of the current phase durations of the three phases may be determined as the phase duration to be set of the phase to be adjusted in the current adjustment period, which is obtained by combining the three phases.

Optionally, on the basis of the preferential combining rule provided in the foregoing embodiment, in the case that the number of the determined first phases is multiple in the foregoing step S303, when, in the selected at least one first phase, there is a third phase that forms the same entrance phase as the two first phases, respectively, and the two first phases are strong collision phases, that is, the electronic device may determine the same second phase for the two first phases that form the strong collision phases at the same time, and the electronic device may combine the second phase with any one of the two first phases to obtain a phase to be adjusted, and determine the other first phase as the phase to be adjusted.

In the above situation, the maximum value of the determined second phase and the current phase duration of the first phase combined with the second phase may be determined as the duration of the phase to be adjusted in the current adjustment period obtained after combination, and the duration of the phase to be set in the current adjustment period of the other first phase is calculated by using the preset formula.

Optionally, on the basis of the priority combining rule provided in the foregoing embodiment, in the case that the number of the determined first phases in the step S303 is multiple, in the at least one selected first phase, when there is a third phase that forms the same entrance phase with the two first phases respectively and forms a symmetric phase with the other first phase, and the two first phases that form the same entrance with the third phase are strong collision phases. That is, the electronic device may determine the same second phase for the three first phases at the same time, and there is a strong conflicting phase that cannot be combined in the three first phases. The electronic device may combine the determined second phase with the first phase constituting the symmetric phase, determine the combined phase as the phase to be adjusted, and determine the other two first phases constituting the same entrance phase as the determined second phase as the phases to be adjusted, respectively.

In the above situation, the maximum value of the current phase durations of the determined second phase and the first phase constituting the symmetric phase may be determined as the phase duration to be set in the current adjustment period of the phase to be adjusted obtained after combination, and the phase durations to be set in the current adjustment period of the other two first phases respectively constituting the same entrance phase with the determined second phase may be respectively calculated by using the preset formula.

It should be noted that, after the phase duration determination method is executed at the starting time of the current adjustment cycle, when the current adjustment cycle ends and a next current adjustment cycle is entered, the electronic device may repeatedly execute the phase duration determination method, and when the next adjustment cycle is entered, designating each intersection in the intersections includes: and when entering the current adjustment period, the electronic equipment executes the phase to be adjusted determined by the phase duration determination method.

For example, taking the L-shaped intersection shown in fig. 1 as an example, when entering the current adjustment cycle, the line 1 and the line 2 in the L-shaped intersection respectively constitute one phase of the L-shaped intersection, that is, the L-shaped intersection has the phase 1 and the phase 2, and the two phases are total.

Furthermore, in the process of the phase duration determination method, the phase 1 and the phase 2 are combined, and the combined phase is used as the phase to be adjusted. And ending the current adjusting period, and when entering the next current adjusting period, the L-shaped intersection only has one phase, and the phase is obtained by combining the phase 1 and the phase 2.

For another example, taking the T-shaped intersection shown in fig. 2 as an example, when the current adjustment cycle is entered, the links a-f at the T-shaped intersection respectively form one phase of the T-shaped intersection, that is, the T-shaped intersection has phases a-f, and the total number of phases is six.

Furthermore, in the process of the phase duration determination method, the phase a and the phase b are combined, and the combined phase ab is taken as the phase to be adjusted. When the current adjusting period is finished and the next current adjusting period is entered, the T-shaped intersection includes a phase ab obtained by combining the phase a and the phase b, that is, the current adjusting period is finished, and when the next current adjusting period is entered, the L-shaped intersection has 5 phases, namely the phase ab and the phase c-f.

step 51: judging whether the signal period is within a preset period range interval or not; if not, executing step 12;

step 52: and adjusting the current phase duration of each phase of the appointed intersection according to the ratio of the maximum value of the preset period range interval to the signal period.

It can be understood that, in order to ensure the normal operation of the road traffic, the phenomena of overlong waiting time of vehicles, or more frequent switching of control signals and the like are avoided, the operation efficiency of the road traffic is reduced, and the signal period needs to be in a more reasonable range.

Based on this, in this specific implementation, the electronic device may determine whether the signal period in use is within a preset period range interval.

If the signal cycle in use is judged to be within the preset cycle range, it is indicated that the signal cycle in use is within a reasonable range, and at this time, the signal cycle in use does not need to be adjusted.

Correspondingly, if the signal cycle in use is judged not to be in the preset cycle range, the signal cycle in use is possibly unreasonable, so that the electronic equipment can firstly calculate the ratio of the maximum value of the preset cycle range to the signal cycle in use, and further calculate the product of the ratio and the current phase duration of each phase of the specified intersection in the signal cycle in use.

Therefore, the signal period in use can be adjusted by adjusting the current phase duration of each phase of the appointed intersection, so that the adjusted signal period can be in a reasonable range, and further, the running efficiency of road traffic is improved.

Optionally, the preset period range interval may be [30s,120s ]. Of course, the preset period range interval may also be other time range intervals, and the embodiment of the present invention does not limit the specific time range of the preset period range interval.

For example, if the predetermined period range interval is [30s,120s ]]If the signal period in use is 140s, the ratio of the maximum value of the preset period range interval to the signal period in use can be calculated first, and then the product of the ratio and the current phase duration of each phase of the specified intersection in the signal period in use is calculated, that is, the product of the ratio and the current phase duration of each phase of the specified intersection is calculated

And multiplying the current phase duration of each phase of the appointed intersection by the current phase duration of each phase of the appointed intersection in the signal cycle in use to obtain the adjusted current phase duration of each phase of the appointed intersection.

Of course, it should be noted that, in the step 12, the electronic device may also adjust the current phase duration of each phase at the designated intersection according to other ratios. The signal period after adjustment is within the preset period range as long as the adopted ratio can enable the signal period to be within the preset period range. The embodiment of the present invention is not particularly limited.

It should be noted that the solution of this embodiment and the solutions shown in the other embodiments described above may be processed in parallel, and the two solutions do not affect each other.

Furthermore, after the current phase duration of each phase at the designated intersection is adjusted by using the scheme in the specific implementation manner, when the scheme shown in each embodiment is adopted again to determine the phase to be adjusted and determine the phase duration to be set of the phase to be adjusted in the current adjustment period, the adjusted current phase duration of each phase at the designated intersection in the specific implementation manner can be used.

Optionally, the electronic device may execute the scheme provided by the embodiment of the present invention according to a preset determination cycle, and since the control manner of the traffic control signal at the designated intersection changes after the current phase duration of each phase at the designated intersection is adjusted according to the scheme of this specific implementation manner, in order to ensure that, in step S101, the control manner of the traffic control signal at the designated intersection is the same as the control manner of the traffic control signal at the designated intersection at the current time in multiple signal cycles, and the determination cycle may be an integral multiple of the adjustment cycle.

For convenience of understanding, when the designated intersection is a T-shaped intersection, the method for determining the relevant phase duration for the T-shaped intersection according to the embodiment of the present invention is described below with reference to a specific embodiment.

Taking the T-shaped intersection shown in fig. 2 as an example, it is assumed that the right-turn phase e, the right-turn phase f, and the straight-going phase b are combined to obtain the phase bef, that is, each phase of the T-shaped intersection includes: the phase a, the phase c, the phase d and the phase bef have four phases.

In the above description of the method for determining the adjustment strategy of the signal control scheme according to the embodiment of the present invention, for a T-shaped intersection, the right-turn phase does not affect the combination between the straight-going phase and the left-turn phase, so for convenience of description, the phase bef may be abbreviated as the phase b, and in the following description of the present embodiment, the effect of the right-turn phase may not be considered.

Based on this, according to the characteristics of the T-shaped intersection, the specific embodiment may include the following various scenarios:

the first scenario is:

when entering the current adjusting period, each phase of the T-shaped intersection comprises: phase a, phase b, phase c and phase d, four phases in total.

In the first case, when the current adjustment period is entered, the determined green light utilization rate is smaller than the first phase with the preset utilization rate, so that multiple cases may exist, and further, for each different case, the electronic device may determine to obtain different phases to be adjusted, and determine to obtain the phase duration to be set of the phases to be adjusted in the current adjustment period in different manners. Specifically, the method comprises the following steps:

case 1: phase a is a first phase, and phases b-d are non-first phases; the electronic device may determine the phase b as the second phase, thereby determining the phase ab obtained by combining the phase a and the phase b as the phase to be adjusted, and determining the maximum value of the current phase durations of the phase a and the phase b as the phase duration to be set of the phase ab in the current adjustment period.

Further, in case 1, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase ab, phase c and phase d, for a total of three phases.

Case 2: phase b and phase d are the first phases; the electronic device may determine the phase a as a second phase of the phase b and the phase d, determine a phase abd obtained by combining the phase a, the phase b and the phase d as a phase to be adjusted, and determine a maximum value among current phase durations of the phase a, the phase b and the phase d as a phase duration to be set of the phase abd in a current adjustment period.

Further, in case 2, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase abd and phase c, for a total of two phases.

Case 3: phase b and phase c are first phases; the electronic device may determine the phase a as a second phase of the phase b and the phase c, determine a phase abc obtained by combining the phase a, the phase b and the phase c as a phase to be adjusted, and determine a maximum value among current phase durations of the phase a, the phase b and the phase c as a phase duration to be set of the phase abc in a current adjustment period.

Case 4: the phase c and the phase d are first phases; the electronic device may determine phase a as the second phase of phase c and phase d; however, since the phase c and the phase d are strong conflicting phases, the phase c and the phase d cannot be combined.

The electronic device may combine the phase a and the phase c to obtain a phase ac to be adjusted, and determine the phase d as another phase to be adjusted, so that the electronic device may determine a maximum value of current phase durations of the phase a and the phase c as a phase duration to be set of the phase ac in a current adjustment period, and calculate a phase duration to be set of the phase d in the current adjustment period by using the preset formula;

further, in case 4, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase ac, phase b and phase d, for a total of three phases.

Alternatively, the first and second electrodes may be,

the electronic device may combine the phase a and the phase d to obtain a phase ad to be adjusted, and determine the phase c as another phase to be adjusted, so that the electronic device may determine a maximum value of current phase durations of the phase a and the phase d as a phase duration to be set of the phase ad in a current adjustment period, and calculate a phase duration to be set of the phase c in the current adjustment period by using the preset formula.

Further, in case 4, when the current adjustment cycle is ended and the next adjustment cycle is entered, the phases of the T-intersection may include: phase ad, phase b, and phase c, for a total of three phases.

In addition, as for the case 4, in addition to the above manner, the electronic device may select any manner from combining the phase a and the phase c to obtain the phase ac to be adjusted and determining the phase d as the phase to be adjusted to obtain the phase to be adjusted; or, any mode is selected from combining the phase a and the phase d to obtain the phase ad to be adjusted and determining the phase c as the phase to be adjusted to obtain the phase to be adjusted. This is all reasonable.

Case 5: the phase b or the phase c or the phase d is a first phase; the electronic device may determine phase a as the second phase of phase b or phase c or phase d; therefore, the phase ab or the phase ac or the phase ad obtained by combining the phase a and the phase b or the phase c or the phase d is determined as the phase to be adjusted, and the maximum value of the current phase duration of the phase a and the phase b, or the maximum value of the current phase duration of the phase a and the phase c is determined as the phase duration to be set of the phase ab or the phase ac or the phase ad in the current adjustment period.

Further, in this case 5, when the current adjustment cycle is ended and the next adjustment cycle is entered, the respective phases of the T-intersection may include: three phases, namely a phase ab, a phase c and a phase d; or, may include: phase ac, phase b and phase d, three phases in total; or, three phases may be included, phase ad, phase b, and phase c.

Case 6: the phase b, the phase c and the phase d are first phases; the electronic device may determine phase a as a first phase of phase b, phase c, and phase d; thus, since the phase a and the phase b are symmetric phases, the merging priority is highest; the phase a and the phase c are the same entrance phase, the phase a and the phase d are the same entrance phase, and the merging priorities of the two cases are the same; the phase c and the phase d are strong conflict phases, and the strong conflict phases cannot be combined; therefore, the electronic device may determine the phase ab obtained by combining the phase a and the phase b as the phase to be adjusted, and determine the phase c and the phase d as the phase to be adjusted, respectively, thereby determining the maximum value of the current phase durations of the phase a and the phase b as the phase duration to be set of the phase ab in the current adjustment period, and calculating the phase durations to be set of the phase c and the phase d in the current adjustment period by using the preset formula;

further, in case 6, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may then include: phase ab, phase c and phase d, for a total of three phases.

In addition, for the above case 6, in addition to the above manner, the electronic device may further select one or two manners of combining the phase a and the phase b to obtain the phase ab to be adjusted, determining the phase c as the phase to be adjusted, and determining the phase d as the phase to be adjusted, to obtain one or two phases to be adjusted. This is all reasonable.

Case 7: in addition to the above 5 cases, the electronic device may determine at least one of the determined first phases as a phase to be adjusted, and calculate a phase duration to be set of the at least one first phase in the current adjustment period by using the preset formula.

Further, in this case 7, when the current adjustment cycle is ended and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase a, phase b, phase c and phase d, for a total of four phases.

The second scenario is as follows:

when entering the current adjusting period, each phase of the T-shaped intersection comprises the following steps: phase ab, phase c and phase d, for a total of three phases.

In this second case, when the current adjustment cycle is entered, the determined first phase in which the utilization rate of the green light is less than the preset utilization rate may be multiple cases, and then, for each different case, the electronic device may determine to obtain a different phase to be adjusted, and determine to obtain the phase duration to be set of the phase to be adjusted in the current adjustment cycle in different manners. Specifically, the method comprises the following steps:

case 1: the phase c or the phase d is a first phase; the electronic device may determine the phase a as the second phase, determine the phase abc or the phase abd obtained by combining the phase ab and the phase c or the phase d as the phase to be adjusted, and determine the maximum value of the current phase durations of the phase ab and the phase c, or determine the maximum value of the current phase durations of the phase ab and the phase d as the phase duration to be set of the phase abc or the phase abd in the current adjustment period.

Further, in case 1, when the current adjustment cycle is ended and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase abc and phase d, two phases in total, or comprising: the phase abd and the phase c have three phases.

Case 2: the phase c and the phase d are first phases; the electronic device may determine phase ab as the first of phase c and phase d; therefore, the phase ab and the phase c are the same phase of the channel entrance, the phase ab and the phase d are also the same phase of the channel entrance, and the merging priority of the two situations is the same; the phase c and the phase d are strong conflict phases which are different and combined;

the electronic device may combine the phase ab and the phase c to obtain a phase abc to be adjusted, and determine the phase d as another phase to be adjusted, so that the electronic device may determine a maximum value of current phase durations of the phase ab and the phase c as a phase duration to be set of the phase abc in a current adjustment period, and calculate a phase duration to be set of the phase d in the current adjustment period by using the preset formula;

further, in case 2, when the current adjustment cycle is ended and the next adjustment cycle is entered, the phases of the T-intersection may include: phase abc and phase d, for a total of three phases.

Alternatively, the first and second electrodes may be,

the electronic device may combine the phase ab and the phase d to obtain a phase abd to be adjusted, and determine the phase c as another phase to be adjusted, so that the electronic device may determine a maximum value of current phase durations of the phase ab and the phase d as a phase duration to be set of the phase abd in a current adjustment period, and calculate the phase duration to be set of the phase c in the current adjustment period by using the preset formula.

Further, in case 2, when the current adjustment cycle is ended and the next adjustment cycle is entered, the phases of the T-intersection may include: phase abd and phase c, for a total of three phases.

In addition, it should be noted that, in the foregoing case 2, in addition to the foregoing manners, the electronic device may select any manner from combining the phase ab and the phase c to obtain the phase abc to be adjusted, and determining the phase d as the phase to be adjusted to obtain the phase to be adjusted; or, any mode is selected from combining the phase ab and the phase d to obtain the phase abd to be adjusted and determining the phase c as the phase to be adjusted to obtain the phase to be adjusted. This is all reasonable.

The third scenario is:

when entering the current adjusting period, each phase of the T-shaped intersection comprises the following steps: phase ad, phase b, and phase c, for a total of three phases.

In this second case, when the current adjustment period is entered, the determined green light utilization rate is smaller than the first phase with the preset utilization rate, so that multiple situations may exist, and further, for each different situation, the electronic device may determine to obtain a different phase to be adjusted, and determine to obtain the phase duration to be set of the phase to be adjusted in the current adjustment period in different manners. Specifically, the method comprises the following steps:

case 1: phase b is a first phase and phase c is a non-first phase; the electronic device may determine the phase ad as the second phase, determine the phase abd obtained by combining the phase ad and the phase b as the phase to be adjusted, and determine the maximum value of the current phase durations of the phase ad and the phase b as the phase duration to be set of the phase abd in the current adjustment period.

Further, in case 2, when the current adjustment cycle is ended and the next adjustment cycle is entered, the phases of the T-intersection may include: phase abd and phase c, for a total of two phases.

Case 2: phase c is a first phase, and phase b is a non-first phase; the electronic equipment cannot determine the second phase, so that the phase c is determined as the phase to be adjusted, and the phase duration to be set of the phase c in the current adjustment period is calculated by using the preset formula;

further, in case 4, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase ad, phase b, and phase c, for a total of three phases.

Case 3: phase b and phase c are first phases; the electronic device may determine the phase ad as the second phase for the phase b, and the electronic device cannot determine the second phase for the phase c, so that the electronic device determines the phase abd obtained by combining the phase ad and the phase b as the phase to be adjusted, and determines the maximum value of the current phase durations of the phase ad and the phase b as the phase duration to be set of the phase abd in the current adjustment period, and further determines the phase c as the phase to be adjusted, and calculates the phase duration to be set of the phase c in the current adjustment period by using the preset formula.

Further, in case 4, when the current adjustment cycle ends and the next adjustment cycle is entered, the respective phases of the T-intersection may include: phase abd and phase c, for a total of two phases.

In addition, in case 4, in addition to the above manner, the electronic device may select any manner from the phase abd obtained by combining the phase ad and the phase b as the phase to be adjusted and the phase c as the phase to be adjusted to obtain the phase to be adjusted. This is all reasonable.

A fourth scenario:

in other scenarios besides the above three scenarios, the electronic device may determine at least one of the determined first phases as a phase to be adjusted, and calculate a phase duration to be set of the at least one first phase in the current adjustment period by using the preset formula.

It should be noted that the foregoing specific embodiment is only used as an example to describe the method for determining the time length of the relevant phase for a T-shaped intersection according to the foregoing embodiment of the present invention when the designated intersection is a T-shaped intersection, and is not limited to the method for determining the time length of the relevant phase for a T-shaped intersection according to the foregoing embodiment of the present invention when the designated intersection is a T-shaped intersection.

Corresponding to the method for determining the adjustment strategy of the signal control scheme provided by the embodiment of the invention, the embodiment of the invention provides a device for determining the adjustment strategy of the signal control scheme.

Fig. 4 is a schematic structural diagram of an apparatus for determining an adjustment strategy of a signal control scheme according to an embodiment of the present invention. As shown in fig. 4, the determining device for the adjustment strategy of the signal control scheme may include the following modules:

the data acquisition module 410 is used for acquiring vehicle passing data of a plurality of signal periods before the current time of the specified intersection when entering each preset adjustment period; in the plurality of signal periods, the signal control scheme of the traffic control signal of the specified intersection is the same as the signal control scheme of the traffic control signal of the specified intersection at the current moment;

a utilization rate calculation module 420, configured to calculate a green light utilization rate of each phase of the designated intersection by using the vehicle passing data;

the phase determining module 430 is configured to determine a phase to be adjusted if a target utilization rate smaller than a preset utilization rate exists in the calculated green light utilization rates; wherein, the lane that the phase place corresponds to waiting to adjust includes at least: the lane corresponding to the first phase with the target utilization rate;

and a duration setting module 440, configured to determine, based on the current phase duration of the first phase, a to-be-set phase duration of the to-be-adjusted phase in a current adjustment period, so as to obtain an adjustment policy of the signal control scheme at the designated intersection.

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection or a T-shaped intersection, the phase determining module 430 is specifically configured to:

determining the first phase as a phase to be adjusted;

correspondingly, the duration setting module 440 is specifically configured to:

Optionally, in a specific implementation manner, the duration setting module 440 is specifically configured to:

T＝t-(1-α)*T _G

Optionally, in a specific implementation manner, when the designated intersection is an L-shaped intersection, the phase determining module 430 is specifically configured to:

if the total number of the phases of the specified intersection and the number of the first phases are both 1, determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of green lights;

Optionally, in a specific implementation manner, when the designated intersection is a T-shaped intersection, the phase determining module 430 includes:

a first determining submodule, configured to determine, for each of the first phases, a second phase at the designated intersection based on a type of the first phase; wherein the second phase is: a phase that can be combined with the first phase among candidate phases, the candidate phases being: in each phase of the appointed intersection, other phases except all the first phases are selected;

and determining a second phase from the candidate phases based on the determined standard phase combination information of each phase and a preset priority combination rule.

wherein the two straight-line phases are symmetrical phases; any left-turn phase and the target same-direction passing phase are the same entrance phase, and the target same-direction passing phase is as follows: the passing direction in the cross lane or the longitudinal lane is the same phase as the passing direction in the cross lane or the longitudinal lane of the left turn phase; the two left-hand phases are strong collision phases.

Optionally, in a specific implementation manner, the duration setting module 440 includes:

Corresponding to the method for determining the adjustment policy of the signal control scheme provided by the above embodiment of the present invention, an embodiment of the present invention further provides an electronic device, as shown in fig. 5, including a processor 501, a communication interface 502, a memory 503 and a communication bus 504, where the processor 501, the communication interface 502 and the memory 503 complete mutual communication through the communication bus 504,

a memory 503 for storing a computer program;

the processor 501 is configured to implement the steps of any method for determining an adjustment strategy of a signal control scheme provided by the above embodiments of the present invention when executing the program stored in the memory 503.

The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the electronic equipment and other equipment.

The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also 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.

In another embodiment of the present invention, a computer-readable storage medium is further provided, in which a computer program is stored, and the computer program is executed by a processor to perform any of the steps of the method for determining an adjustment strategy of a signal control scheme according to the embodiments of the present invention.

In a further embodiment of the present invention, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of any of the methods for determining an adjustment strategy for a signaling scheme provided in the embodiments of the present invention described above.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, apparatus embodiments, electronic device embodiments, computer-readable storage medium embodiments, and computer program product embodiments are substantially similar to method embodiments and therefore are described with reference to the method embodiments for some portions of the description herein.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for determining an adjustment strategy for a signal control scheme, the method comprising:

calculating the green light utilization rate of each phase of the appointed intersection by using the vehicle passing data; wherein, the green light utilization ratio of each phase of the appointed intersection is as follows: in each signal period, when the phase acquires the right of way, the time of the vehicle passing through the specified intersection from the phase accounts for the proportion of the duration of the green light control signal in the duration of the phase;

if the calculated green light utilization rate has a target utilization rate smaller than a preset utilization rate, determining a phase to be adjusted; wherein, the lane that the phase place corresponds to waiting to adjust includes at least: the lane corresponding to the first phase with the target utilization rate;

determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase to obtain an adjustment strategy of the signal control scheme of the specified intersection;

when the designated intersection is an L-shaped intersection or a T-shaped intersection, the step of determining the phase to be adjusted comprises the following steps: determining the first phase as a phase to be adjusted; correspondingly, the step of determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase includes: determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light;

when the designated intersection is an L-shaped intersection, the step of determining the phase to be adjusted comprises the following steps: if the total number of the phases at the appointed intersection and the number of the first phases are both judged to be 1, determining the phase at the appointed intersection as a phase to be adjusted; otherwise, combining all phases of the specified intersection, and determining the combined phases as phases to be adjusted;

when the designated intersection is a T-shaped intersection, the step of determining the phase to be adjusted comprises the following steps: for each of the first phases, determining a second phase in the designated intersection based on the type of the first phase; wherein the second phase is: a phase that can be combined with the first phase among candidate phases, the candidate phases being: in each phase of the specified intersection, other phases except all the first phases; determining phases to be adjusted based on the number of the first phases and a second phase determination result of each first phase; wherein the second phase determination result for each first phase is: for characterizing the result of whether the second phase is determined in the candidate phases.

2. The method of claim 1, wherein the step of determining the phase duration to be set for the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of green light comprises:

wherein the content of the first and second substances,

for the phase duration to be set of the phase to be adjusted in the current adjustment period,

is the current phase duration of the first phase,

for the calculated green light utilization of said first phase,

comprises the following steps: and in the current phase time length of the first phase, the time length of the green light control signal corresponding to the first phase.

3. The method according to claim 1, wherein when the designated intersection is an L-shaped intersection, the step of determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase comprises:

if the total number of the phases at the appointed intersection is judged to be 2 and the number of the first phases is judged to be 1, determining the maximum value in the current phase duration of each phase at the appointed intersection as the phase duration of the phase to be adjusted;

4. The method of claim 1, wherein the step of determining the phase to be adjusted based on the number of first phases and the second phase determination result for each first phase comprises:

5. The method of claim 4, wherein the step of determining a second phase in the designated intersection based on the type of the first phase comprises:

and if the first phase is a non-right-turn phase in the T-shaped intersection, determining a second phase from the candidate phases based on a preset priority combination rule.

6. The method of claim 5, wherein the T-junction comprises 4 standard phases, wherein the 4 standard phases comprise: two straight going phases and two left-turn phases of the transverse road of the T-shaped intersection are as follows: a phase of a longitudinal road turning left from the transverse road to the T-shaped intersection and a phase of a longitudinal road turning left from the longitudinal road to the transverse road;

7. The method of claim 6, wherein the preset preferential merging rule is:

the corresponding lanes respectively comprise lanes corresponding to different phases in the same access port phase and do not comprise the combined priority of the two phases of the lanes corresponding to the different phases in the strong conflict phase;

the corresponding lanes respectively comprise two phases of the lanes corresponding to different phases in the strong conflict phases, and the two phases are not combined;

wherein the two straight-line phases are symmetrical phases; any left-turn phase and the target same-direction passing phase are the same entrance phase, and the target same-direction passing phase is as follows: the passing direction in the transverse road or the longitudinal road is the same phase as the passing direction of the left-turn phase in the transverse road or the longitudinal road; the two left-turn phases are strong collision phases.

8. The method according to any one of claims 4-7, wherein the step of determining the phase duration to be set for the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase comprises:

9. The method of claim 8, wherein the step of determining the phase duration to be set of the phase to be adjusted in the current adjustment period from the current phase durations of the first phase and the second phase comprises:

10. An apparatus for determining an adjustment strategy for a signal control scheme, the apparatus comprising:

the data acquisition module is used for acquiring vehicle passing data of a plurality of signal periods before the current moment of the appointed intersection when entering each preset adjustment period; in the plurality of signal periods, the signal control scheme of the traffic control signal of the specified intersection is the same as the signal control scheme of the traffic control signal of the specified intersection at the current moment;

the utilization rate calculation module is used for calculating the green light utilization rate of each phase of the specified intersection by using the vehicle passing data; wherein, the green light utilization ratio of each phase of the appointed intersection is as follows: in each signal period, when the phase acquires the right of way, the time of the vehicle passing through the specified intersection from the phase accounts for the proportion of the duration of the green light control signal in the duration of the phase;

the time length setting module is used for determining the time length of the phase to be adjusted in the current adjustment period based on the current phase time length of the first phase, so as to obtain an adjustment strategy of the signal control scheme of the specified intersection;

when the designated intersection is an L-shaped intersection or a T-shaped intersection, the phase determination module is specifically configured to: determining the first phase as a phase to be adjusted; correspondingly, the duration setting module is specifically configured to: determining the phase duration to be set of the phase to be adjusted in the current adjustment period based on the current phase duration of the first phase and the utilization rate of the green light;

when the designated intersection is an L-shaped intersection, the phase determination module is specifically configured to: if the total number of the phases at the appointed intersection and the number of the first phases are both judged to be 1, determining the phase at the appointed intersection as a phase to be adjusted; otherwise, combining all phases of the specified intersection, and determining the combined phases as phases to be adjusted;

when the designated intersection is a T-shaped intersection, the phase determination module is specifically configured to: for each of the first phases, determining a second phase in the designated intersection based on a type of the first phase; wherein the second phase is: a phase that can be combined with the first phase among candidate phases, the candidate phases being: in each phase of the appointed intersection, other phases except all the first phases are selected; determining phases to be adjusted based on the number of the first phases and a second phase determination result of each first phase; wherein the second phase determination result for each first phase is: for characterizing the result of whether the second phase is determined in the candidate phases.