CN116721548B - Signal control method for safety switching of cross-period scheme - Google Patents
Signal control method for safety switching of cross-period scheme Download PDFInfo
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- CN116721548B CN116721548B CN202310980119.9A CN202310980119A CN116721548B CN 116721548 B CN116721548 B CN 116721548B CN 202310980119 A CN202310980119 A CN 202310980119A CN 116721548 B CN116721548 B CN 116721548B
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- 230000007704 transition Effects 0.000 claims abstract description 11
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- 238000004590 computer program Methods 0.000 claims description 13
- 239000003086 colorant Substances 0.000 claims description 5
- 238000000819 phase cycle Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 description 4
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- 125000004122 cyclic group Chemical group 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides a signal control method for safety switching of a cross-period scheme, and belongs to the technical field of signal control. The method comprises the following steps: s1, judging the period duration of a current scheme, calculating the period of ending the period, and obtaining the next period scheme; s2, judging whether the current scheme is the same as the next period scheme, if not, executing S3, and if so, executing S5; s3, judging whether the first stage of the scheme a is the same as the first stage of the scheme b, if not, executing S4, and if so, executing S5; s4, carrying out scheme safety transition switching pretreatment, and updating the lamp color duration of the period; s5, performing signal control according to a set stage and a lamp color sequence; s6, when the current period operation is finished, sending a report, and after the configuration operation is updated, jumping to the next period head and switching the scheme. The problem of the signal control scheme switching lamp color jump is solved. The traffic safety of the crossing is ensured, the potential safety hazard is reduced, and the maintenance cost of time-sharing personnel is reduced.
Description
Technical Field
The application relates to a signal control method, in particular to a signal control method for safety switching of a cross-period scheme, and belongs to the technical field of signal control.
Background
With the rapid development of urban traffic, the holding quantity of motor vehicles in the city continuously increases, and the traffic flow of the crossing is rapidly increased in the peak time of going to work, so that the road is congested, and the signal control strategy of the crossing is to ensure the traffic rate of the crossing in all directions as much as possible; in other daytime, the traffic flow is stable, and the signal control strategy of the intersection mainly ensures the smoothness of the main road and reduces delay; in late night time, people and vehicles on roads are fewer, the traffic flow is sparse, and the control strategy of the intersection is mainly to ensure driving safety and reduce noise. In addition to workdays, there are different traffic demands on special days such as holidays, large meetings, exhibitions, activities, etc., and according to these different demands, different signal control schemes are required to be designed according to specific time periods.
The signal control scheme of the existing crossing is mostly fixed-period multi-period control, each period sequentially releases all directions or opposite vehicles, each release combination is solidified into one release phase (light color sequence and duration), each scheme period is a combination of a plurality of release phases, and the crossing annunciators control and output signal light colors according to the fixedly designed phase sequence in one period.
Under normal conditions, under a preset scheme, the intersection can normally display signal lamps in all directions; however, when the scheme is switched in the cross period, the tail stage of the previous scheme and the first stage of the next scheme are not effectively connected, so that signal light color jump (the green light suddenly changes to the red light or the motor vehicle immediately changes to the green light from the yellow light to the red light) occurs at the intersection, and the motor vehicle and the pedestrian can be overwhelmed in the process, thereby causing traffic accidents and affecting traffic safety. This situation is not bad in some of the well-known brands of annunciators, and because it does not take into account the safety switching of the scheme across time periods, only the redesign and modification of the scheme can be performed after the problem occurs, but at the moment when the problem occurs, there is a great potential safety hazard.
Referring to fig. 3-4, a handover scheme is illustrated; FIG. 3 is a plan before switching of plan 1, sequentially performing east-west left, east-west right, north-south left, south-north right release of the motor vehicle, and pedestrian following release; fig. 4 shows a scheme after the scheme 2 is switched, and the motor vehicle is sequentially released in the south direction, the east direction, the north direction and the west direction anticlockwise direction, and pedestrians are released along with the motor vehicle. When the scheme is switched without the cross-period scheme, the scheme 1 finishes continuously operating the scheme 1, and the motor vehicle in the north-south direction directly goes through the green light and the yellow light to be changed into the red light for a period of time; the pedestrians in the eastern direction cross the street once and the western direction cross the street once, turn into red lights after green flashing and last for a period of time; the pedestrians in the east direction cross the street twice and the pedestrians in the west direction cross the street twice, so that the green light is kept unchanged. However, if the scheme 1 is switched to the scheme 2, no safety transition is made to the direction of the south vehicle, the vehicle goes straight through the green flashing and yellow light to become red light, and the vehicle turns to green light again after 2 seconds; the pedestrians cross the street once in the eastern direction and the western direction, and the pedestrians cross the street once, so that the pedestrians turn into green light after a few seconds; the pedestrians in the western direction can jump from green light to red light directly after crossing the street for the second time, so that certain potential safety hazards exist.
Researchers have proposed:
the publication number is: the method for generating the timing scheme of the traffic signal, the generating device and the storage medium of the CN201911150392 are characterized in that the method for generating the timing scheme of multiple time periods is provided according to the simulation calculation of the traffic flow, but the safety of switching the scheme of the time periods is not considered, and the abnormal jump of the lamp color and potential safety hazard possibly occurring in the switching of the scheme are not illustrated and processed;
the system for switching and adjusting the control scheme has the publication number of CN201910219987, but integrates and files all the reference schemes and optimized schemes on the basis of configuring a traffic signal control reference scheme and realizing the coordination and optimization of intersections, trunk lines and areas, so as to realize the rapid change of the coordinated intersection signal control scheme during single-point central control; only the scheme switching is performed in the trunk line coordination scene, the scheme switching in the multi-period fixed-period scene of the annunciator is not considered, and the possible abnormal jump of the lamp color and potential safety hazard in the scene are not illustrated and processed.
Therefore, the problem of switching the color hopping of the lamp by the signal control scheme exists if the scheme switching across time periods is not considered or a plurality of timing personnel perform scheme designs of different time periods.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of this, in order to solve the technical problem of switching the color hopping of the lamp in the signal control scheme in the prior art, the invention provides a signal control method for switching the time-interval scheme safely. The multi-period fixed-period scheme of the annunciator mainly carries out design audit by timing and auditing personnel, but has a certain auditing dead zone in a scene of switching the cross-period scheme, and is easy to cause the problem of lamp color jump at the intersection; after the method is adopted by the annunciator, timing and auditing personnel only pay attention to the scheme design, do not pay attention to the scheme switching of the time span, and can automatically switch in a transition manner according to the method, so that the color of the lamp is ensured to have no abnormal jump, the potential safety hazard is reduced, the maintenance cost of timing personnel is reduced, and the working efficiency is improved.
The first scheme is a signal control method for safety switching of a cross-period scheme, which comprises the following steps:
s1, judging the period duration of a current scheme a, calculating the period of ending the period, and obtaining a next period scheme b;
s2, judging whether the current scheme a is the same as the next periodic scheme b, if not, executing S3, and if so, executing S5;
s3, judging whether the first stage of the scheme b is the same as that of the scheme a, if not, executing S4, and if so, executing S5;
s4, scheme safety transition switching pretreatment, and updating the lamp color duration of the current period;
s41, calculating the period sum of the current scheme a and the next period scheme b, and recalculating each phase time of the current scheme according to the next period scheme;
s42, updating the phase release time length of the current scheme;
s5, performing signal control according to a set stage and a lamp color sequence;
s6, when the current period operation is finished, sending a report, jumping to the next period head after updating configuration operation, and switching the scheme b.
Preferably, the method for calculating the period sum of the current scheme a and the next period scheme b and recalculating each phase time of the current scheme according to the next period scheme specifically comprises the following steps:
s411, circularly traversing the next period scheme by taking the current moment as a starting point, sequentially calculating the lamp colors of all phases according to the current phase sequence, and accumulating the lamp color duration until the lamp color of the phase in the tail stage of the current scheme becomes red;
s412, traversing all phases again in the loop;
s413, setting a lamp color according to the traversing result;
s414, judging the sum of accumulated time lengths of the phases in the current stage and the stages existing later, and setting the lamp color according to the judging result.
Preferably, all phases are traversed again in a loop, the traversing results comprising:
result one: the phase is not in the current scheme;
and a second result: the phase is in the current scheme but not in the current phase;
and (3) a result III: the phase is in the current phase of the current scheme.
Preferably, the method for setting the lamp color according to the traversing result is as follows:
setting the lamp color as off when the traversing result is the result one;
setting the lamp color as red and accumulating the red lamp duration when the traversing result is a second result;
judging whether the phase continuously appears in the subsequent stage when the traversing result is the result III; if the phase appears continuously in the following multiple phases, accumulating the residual duration of the current phase and the duration of the following phases.
Preferably, the method for judging the summation of the accumulation time length of the phase in the current stage and the phase existing in the subsequent stage and setting the lamp color according to the judgment result is as follows:
judging whether the accumulated time length is less than or equal to the red light time of losing the road right of the phase, if so, setting the light color as red light, and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light and the yellow light time of the road right lost by the phase, if so, setting the light color as the yellow light and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light, the yellow light and the green flashing time of the phase loss road weight, if so, setting the lamp color as green flashing, and accumulating the time length; otherwise, setting the phase lamp color as green light.
The second scheme is an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the step of the signal control method for switching the scheme safety across time periods when executing the computer program.
A third aspect is a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements a signal control method for switching between time-interval scenarios.
The beneficial effects of the invention are as follows: the invention is suitable for the crossing under the multi-period fixed period control, and safely switches the scheme switching under the multi-period fixed period control, ensures that the signal lamp color transits according to the normal lamp color, and ensures that the lamp color does not jump abnormally, thereby ensuring the traffic safety of the crossing, reducing the potential safety hazard, reducing the maintenance cost of time-sharing personnel and improving the efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic flow diagram of a signal control method for secure switching across time slots;
FIG. 2 is a schematic diagram of a scheme safety transition switching preprocessing flow;
FIG. 3 is a schematic diagram of scheme 1 before switching;
fig. 4 is a schematic diagram of the scheme after scheme 2 switching.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is given with reference to the accompanying drawings, and it is apparent that the described embodiments are only some of the embodiments of the present application and not exhaustive of all the embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Embodiment 1, referring to fig. 1-4, a signal control method for switching safely between time periods is described in this embodiment, the signal control method is effective after a signal machine is started, when each scheme period starts, a time period where a next period scheme is located is calculated according to a period duration of this scheme, the next period scheme is obtained according to a time period table, if the next period scheme is the same as a current scheme, the signal control method operates according to an originally designed stage and a phase duration, if the next period scheme is different from the current scheme, the calculation for switching safely between the current scheme and the next period scheme updates a duration of a lamp color (without changing a lamp color sequence) in a last stage or multiple stages of this scheme, thereby achieving safe transition and reducing abnormal jump of the lamp color, and includes the following steps:
s1, judging the period duration of a current scheme a, calculating the period of ending the period, and obtaining a next period scheme b;
s2, judging whether the current scheme a is the same as the next periodic scheme b, if not, executing S3, and if so, executing S5;
s3, judging whether the first stage of the scheme b is the same as that of the scheme a, if not, executing S4, and if so, executing S5;
s4, scheme safety transition switching pretreatment, and updating the lamp color duration of the current period;
s41, calculating the period sum of the current scheme a and the next period scheme b, and recalculating each phase time of the current scheme according to the next period scheme, wherein the method specifically comprises the following steps:
s411, circularly traversing the next period scheme by taking the current moment as a starting point, sequentially calculating the lamp colors of all phases according to the current phase sequence, and accumulating the lamp color duration until the lamp color of the phase in the tail stage of the current scheme becomes red;
s412, traversing all phases again in the loop, wherein the traversing result comprises the following specific steps:
result one: the phase is not in the current scheme;
and a second result: the phase is in the current scheme but not in the current phase;
and (3) a result III: the phase is in the current phase of the current scheme.
S413, setting a lamp color according to the traversing result; specifically, the method for setting the lamp color according to the traversing result is as follows:
setting the lamp color as off when the traversing result is the result one;
setting the lamp color as red and accumulating the red lamp duration when the traversing result is a second result;
judging whether the phase continuously appears in the subsequent stage when the traversing result is the result III; if the phase appears continuously in the following multiple phases, accumulating the residual duration of the current phase and the duration of the following phases.
S414, judging the sum (left_phase_time) of accumulated time lengths of phases in the current phase and phases existing later, and setting the lamp color according to the judging result, wherein the method comprises the following steps:
judging whether the accumulated time length is less than or equal to the red light time of losing the road right of the phase, if so, setting the light color as red light, and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light and the yellow light time of the road right lost by the phase, if so, setting the light color as the yellow light and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light, the yellow light and the green flashing time of the phase loss road weight, if so, setting the lamp color as green flashing, and accumulating the time length; otherwise, setting the phase lamp color as green light.
Specifically, if the phase appears continuously in a plurality of subsequent phases, accumulating the current phase residual duration and the subsequent phase duration, and if the subsequent phase does not exist, only the residual time of the phase;
specifically, the red light time when the road right is lost is the red light emptying road mouth time;
according to the two-time cyclic calculation, the lamp colors and the time of all phases in the current scheme are recalculated to be updated by means of the next cyclic scheme, and the situation that the signal lamp color jumps can not occur when the scheme is finished; by the method, if the phase of the special application short time length exists, the corresponding lamp color time length can be updated as well, the situation that the phase time length is too short to meet the safety transition cannot occur, and the normal transition of the signal lamp color of the intersection is ensured. When the next scheme is entered, the same judgment and update processing is similarly performed.
S42, updating the phase release time length of the current scheme;
s5, performing signal control according to a set stage and a lamp color sequence;
s6, when the current period operation is finished, sending a report, jumping to the next period head after updating configuration operation, and switching the scheme b.
Specifically, the safety transition method for switching the traffic light schemes is applicable not only in a multi-period fixed-period scene, but also in other scenes of switching most control mode schemes.
In embodiment 2, the computer device of the present invention may be a device including a processor and a memory, for example, a single chip microcomputer including a central processing unit. And the processor is used for realizing the steps of the signal control method for switching the cross-period scheme security when executing the computer program stored in the memory.
The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
Embodiment 3, computer-readable storage Medium embodiment
The computer readable storage medium of the present invention may be any form of storage medium that is readable by a processor of a computer device, including but not limited to, nonvolatile memory, volatile memory, ferroelectric memory, etc., on which a computer program is stored, and when the processor of the computer device reads and executes the computer program stored in the memory, the steps of a signal control method for switching safely across time schemes described above can be implemented.
The computer program comprises computer program code which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of the above description, will appreciate that other embodiments are contemplated within the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is defined by the appended claims.
Claims (4)
1. The signal control method for the cross-period scheme safety switching is characterized by comprising the following steps of:
s1, judging the period duration of a current scheme a, calculating the period of ending the period, and obtaining a next period scheme b;
s2, judging whether the current scheme a is the same as the next periodic scheme b, if not, executing S3, and if so, executing S5;
s3, judging whether the first stage of the scheme b is the same as that of the scheme a, if not, executing S4, and if so, executing S5;
s4, scheme safety transition switching pretreatment, and updating the lamp color duration of the current period;
s41, calculating the period sum of a current scheme a and a next period scheme b, and recalculating each phase time of the current scheme according to the next period scheme, wherein the method comprises the following steps:
s411, circularly traversing the next period scheme by taking the current moment as a starting point, sequentially calculating the lamp colors of all phases according to the current phase sequence, and accumulating the lamp color duration until the lamp color of the phase in the tail stage of the current scheme becomes red;
s412, traversing all phases again in the loop;
s413, setting a lamp color according to a traversing result, wherein the traversing result comprises:
result one: the phase is not in the current scheme;
and a second result: the phase is in the current scheme but not in the current phase;
and (3) a result III: the phase is in the current stage of the current scheme;
the method for setting the lamp color according to the traversing result comprises the following steps:
setting the lamp color as off when the traversing result is the result one;
setting the lamp color as red and accumulating the red lamp duration when the traversing result is a second result;
judging whether the phase continuously appears in the subsequent stage when the traversing result is the result III; if the phase appears continuously in a plurality of subsequent stages, accumulating the residual duration of the current stage and the duration of the subsequent stages;
s414, judging the summation of accumulated time length of the phase in the current stage and the phase existing later, and setting the lamp color according to the judgment result;
s42, updating the phase release time length of the current scheme;
s5, performing signal control according to a set stage and a lamp color sequence;
s6, when the current period operation is finished, sending a report, jumping to the next period head after updating configuration operation, and switching the scheme b.
2. The signal control method for switching safety across time period scheme according to claim 1, wherein the method for judging the sum of accumulated time lengths of phases in a current phase and a phase existing later, and setting a lamp color according to a judgment result is as follows:
judging whether the accumulated time length is less than or equal to the red light time of losing the road right of the phase, if so, setting the light color as red light, and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light and the yellow light time of the road right lost by the phase, if so, setting the light color as the yellow light and accumulating the time length; if not, judging whether the accumulated time length is less than or equal to the sum of the red light, the yellow light and the green flashing time of the phase loss road weight, if so, setting the lamp color as green flashing, and accumulating the time length; otherwise, setting the phase lamp color as green light.
3. An electronic device comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of a signal control method for switching securely across time schemes of any one of claims 1 or 2 when executing the computer program.
4. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements a signal control method of a cross-period scheme security handover as claimed in any one of claims 1 or 2.
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