CN114550546A - Intersection signal timing method for teaching - Google Patents
Intersection signal timing method for teaching Download PDFInfo
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- CN114550546A CN114550546A CN202210180132.1A CN202210180132A CN114550546A CN 114550546 A CN114550546 A CN 114550546A CN 202210180132 A CN202210180132 A CN 202210180132A CN 114550546 A CN114550546 A CN 114550546A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000006870 function Effects 0.000 claims abstract description 21
- 238000013461 design Methods 0.000 claims abstract description 20
- 238000000819 phase cycle Methods 0.000 claims description 6
- MFYSUUPKMDJYPF-UHFFFAOYSA-N 2-[(4-methyl-2-nitrophenyl)diazenyl]-3-oxo-n-phenylbutanamide Chemical compound C=1C=CC=CC=1NC(=O)C(C(=O)C)N=NC1=CC=C(C)C=C1[N+]([O-])=O MFYSUUPKMDJYPF-UHFFFAOYSA-N 0.000 claims description 3
- 108010076504 Protein Sorting Signals Proteins 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 claims 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
- G09B19/0007—Signalling
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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Abstract
A signal timing method for an intersection for teaching comprises the following steps: determining relevant parameters and circuit design of a teaching aid by surveying an actual intersection; the students autonomously calculate related parameters through survey data and determine values through setting functions; thirdly, independently assembling an intersection signal control system by students through electronic circuit related knowledge; and fourthly, after the relevant parameters are input into the controller, the controller displays the specific intersection workflow according to the set workflow work. The invention can enable a user in teaching to directly operate the three parts of the traffic signal phase, the controller circuit and the signal control program, the signal operation is more transparent, the signal display effect is more vivid, and the invention is more suitable for classroom teaching and convenient for the practical operation of students.
Description
Technical Field
The application relates to the technical field of teaching, in particular to an intersection signal timing method in intelligent traffic teaching.
Background
The rapid and comprehensive development of the traffic engineering system needs a new learning method to cultivate a new generation of traffic engineering professional talents and improve the professional technical ability, technical insight and system integration ability of students. The invention is based on the traffic engineering major, focuses on the actual traffic engineering problem, takes the design of an intersection phase timing scheme as a main purpose, takes the design of an intersection signal timing simulation model as a carrier, expands the knowledge width of students from two aspects of professional knowledge and practical practice, and trains the capability of the students for solving the practical problem and developing engineering design and product design around the specific engineering problem. The innovative thinking of the students is stimulated and the innovative ability of the students is enhanced by combining the guidance of the instructor and the independent learning of the students.
The existing teaching aid and method for intersection signal timing used in teaching have complex integrated system, higher cost, are not suitable for classroom teaching, and are not beneficial to students to participate in design and improvement in a centralized way. The timing method design adopting the new design is more suitable for classroom teaching and is convenient for practical operation of students. In order to obtain creativity, evaluate and analyze higher-level thinking skills and train the abilities of students, the invention is based on open cross-subject engineering design problems to enable the students to actively participate in scientific and technological innovation activities, arouse innovative thinking, enhance innovation ability and combine cross-subject basic concepts including traffic engineering knowledge with engineering principles. Green band signaling based on coordinated communication between controllers will also place higher demands on the students' basic professional literacy and innovation capabilities.
The invention combines practical engineering problems in classical independent intersection signal timing teaching contents, and closely combines signal timing design and signal lamp control design together, and the design can more effectively help students master basic concepts in the traffic field and effectively improve the practical ability.
Disclosure of Invention
The invention aims to avoid the defects in the prior art, and provides a newly designed timing method which is more suitable for classroom teaching and is convenient for students to actually operate, so that the defects in the existing teaching process are effectively overcome.
In order to achieve the purpose, the invention adopts the technical scheme that:
determining relevant parameters of a teaching aid by surveying an actual intersection, such as the structure composition, phase sequence, signal duration, traffic flow and the like of a signalized intersection;
independently calculating related parameters by students through survey data, determining the working sequence and the duration of each module according to the input phase sequence and the duration, and determining a numerical value through a set function;
step two, 1, determining the composition of a signal lamp of each entrance of the intersection through the structural composition of the intersection, wherein the sequence of each phase is full red-green light-yellow light-full red of the previous stage;
step two, 2, determining the signal timing of the intersection by a Webster method according to the traffic flow, wherein the sequence of different phases can be freely switched, and the whole intersection conforms to the safety principle and the minimum delay principle;
and step three, independently assembling the intersection signal control system by students through the related knowledge of the electronic circuit.
Step three, 1, installing a circuit according to the designed signal lamp composition;
the 54 interfaces are all available as inputs and outputs and use pinMode (), digitalWrite () and digitalRead () functions, 5v voltage operation, 40mA maximum current per interface and the interface has a built-in 200 ohm pull-up resistance.
Step three, 2, inputting the calculated timing into a program;
after inputting the relevant parameters to the controller, the controller displays the specific intersection workflow according to the set workflow work;
step four, 1, detecting the lighting of each intersection through an interlocking program to prevent phase conflict;
step four, 2, emptying all vehicles at the intersection after the full red stage is finished every time one cycle is finished;
step four, 3, no conflict between the motor vehicle phase and the pedestrian phase is required when the pedestrian phase is initiated;
the technical scheme of the invention has the following beneficial effects:
the intersection signal timing method in the intelligent traffic teaching combines the actual engineering problem in the classical intersection signal timing content, and solves the actual problem by using various engineering and scientific technical means, such as electronic circuits, controller communication, object-oriented programming and the like; in the design task of the intersection signal timing method in intelligent traffic teaching, signal timing design and signal lamp control design are closely combined together, intersection signal equipment with high cost is reduced and constructed through electronic equipment such as Arduino and the like, the actual traffic engineering problem is focused on, the intersection phase timing scheme design is taken as a main purpose, an intersection signal timing simulation model is taken as a carrier, depth knowledge is mined from two aspects of professional knowledge and manual practice to expand the knowledge width of students, and the capacities of the students in solving practical problems and developing engineering design and product design around specific problems of production and life are exercised.
Drawings
Fig. 1 is a signal function control program design structure diagram of an intersection signal timing method in intelligent traffic teaching according to an embodiment of the present invention;
fig. 2 is a four-phase signal timing sequence diagram constructed at an intersection in the intersection signal timing method in the intelligent traffic teaching according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In order to achieve the purpose, the invention adopts the technical scheme that:
determining relevant parameters of a teaching aid by surveying an actual intersection, such as the structure composition, phase sequence, signal duration, traffic flow and the like of a signalized intersection;
independently calculating related parameters by students through survey data, determining the working sequence and duration of each module according to the input phase sequence and duration, and expressing through functions;
function one: t _ YE (), two yellow lamps are controlled such that the interfaces of the two yellow lamps are first at high level for 3000 ms and then go to low level.
Function two: t RED (), two RED lamps are controlled so that the two RED lamp interfaces are at a high level or a low level.
Function three: AT RED (), three RED light interfaces are controlled to be AT high level or low level.
Function four: f _ RED (), four pedestrian RED light in a certain direction are controlled, and the four pedestrian RED light interfaces are at high level or low level.
Function five: and O _ MOVE (), controlling the traffic flow to turn to the green lamp at the left, enabling the interface of the green lamp needing to pass to be at a high level, simultaneously checking whether traffic flow line conflict exists, flashing the green lamp three times after the green lamp time is over, then turning off the green lamp and flashing the yellow lamp three times, and enabling all the lamps lighted in the stage to be in a low-level turning-off state, and ending the phase.
Function six: and T _ MOVE (), controlling the vehicle to MOVE straight to turn to the right to turn to the green lamp, enabling the interface of the green lamp needing to pass to be at a high level, simultaneously checking whether traffic flow line conflict exists, flashing the green lamp three times after the green lamp time is finished, then turning off the green lamp and flashing the yellow lamp three times after the green lamp is turned off, and enabling all the lamps turned on at the stage to be in a low-level off state, and ending the phase.
Function seven: PIN _ MODE for initializing all Pin PINs and states and defining the connection position of each signal lamp on the control board
The function eight: all RED, the interfaces for All RED lamps are first brought high for 3000 milliseconds, and then go low.
Nine functions: PHASE (int TIME, int Legs) PHASE function, defining the TIME and sequence required by each PHASE and the traffic flow lines allowed to be in the same line in each PHASE
The letter is tens: check () an interlock function that checks whether all conflicting traffic streamlines exist, e.g., a northeastern straight green light and a southeast straight green light may not exist simultaneously.
Step two, 1, determining the composition of a signal lamp of each entrance of the intersection through the structural composition of the intersection, wherein the sequence of each phase is full red-green light-yellow light-full red of the previous stage;
step two, 2, determining the signal timing of the intersection by a Webster method according to the traffic flow, wherein the sequence of different phases can be freely switched, and the whole intersection conforms to the safety principle and the minimum delay principle;
and step three, independently assembling the intersection signal control system by students through the related knowledge of the electronic circuit. Installing a circuit according to the designed signal lamp composition;
the 54-port interfaces are all available as inputs and outputs, and use pinMode (), digitalWrite () and digitalRead () functions. 5v voltage operation, 40mA maximum current per interface and interface with built-in 200 pull-up resistance.
And fourthly, after the relevant parameters are input into the controller, the controller displays the specific intersection workflow according to the set workflow work.
Step four, 1, detecting the lighting of each intersection through an interlocking program to prevent direct conflict of traffic flow lines in the same phase;
step four, 2, emptying all vehicles at the intersection after a full red stage is finished every time one cycle is finished;
and step four and 3, when the pedestrian phase is initiated, no collision between the motor vehicle phase and the pedestrian phase is required.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express one embodiment of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A signal timing method for an intersection for teaching is characterized by comprising the following steps:
determining relevant parameters of a teaching aid by surveying an actual intersection, such as the structure composition, phase sequence, signal duration, traffic flow and the like of a signalized intersection;
independently calculating related parameters by students through survey data, determining the working sequence and the duration of each module according to the input phase sequence and the duration, and determining a numerical value through a set function;
step two, 1, determining the composition of a signal lamp of each entrance of the intersection through the structural composition of the intersection, wherein the sequence of each phase is full red-green light-yellow light-full red of the previous stage;
step two, 2, determining signal timing of the intersection by a Webster method according to the traffic flow, wherein the whole intersection conforms to the safety principle and the minimum delay principle;
independently assembling an intersection signal control system by students through electronic circuit related knowledge, and installing a circuit according to the designed signal lamp composition;
the 54 interfaces can be used as input and output, and use pinMode (), digitalWrite () and digitalRead () functions, 5v voltage operation, the maximum current of each interface is 40mA, the interfaces have built-in pull-up resistors of 200 ohms, and in addition, some interfaces have special functions;
after inputting the relevant parameters to the controller, the controller displays the specific intersection workflow according to the set workflow work;
step four, 1, detecting the lighting of each intersection through an interlocking program to prevent phase conflict;
step four, 2, emptying all vehicles at the intersection after a full red stage is finished every time one cycle is finished;
and step four and 3, when the pedestrian phase is initiated, no motor vehicle phase conflicts with the pedestrian phase directly.
2. The method for signal timing at an intersection for teaching of claim 1, wherein the program of the control function for intersection signals for teaching is an object-oriented design structure to achieve signal cycle, phase design, signal lamp control.
3. The pedagogical intersection signal timing method of claim 1, wherein the interlock procedure-prohibits concurrent checking of traffic flow line conflicts for straight-ahead vehicle flow lines in different directions within the same phase.
4. The pedagogical intersection signal timing method of claim 1, wherein the phase program combines and sequences the different vehicle streamlines.
5. The method for implementing signal timing at an intersection for teaching according to claim 1, wherein the method for designing the signal control program at the intersection for teaching is characterized in that the controller is abstracted into classes by using the characteristics of object-oriented programming, so that the program is favorable for being used for other crossroads, the program design firstly emphasizes the packaging concept and defines the interface between a signal lamp and the controller; and secondly, applying a multi-state concept, wherein different numbers of vehicle streamline control functions can be called in the same phase, and main components comprise a motor vehicle lighting unit, a pedestrian lighting unit and a controller, wherein the motor vehicle lighting system is divided into a left-turn lighting system and a straight-going right-turn lighting system, and the lighting systems are sequentially connected through an input port and an output port (led-resistor-mcu interface).
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| CN202210180132.1A CN114550546A (en) | 2022-02-26 | 2022-02-26 | Intersection signal timing method for teaching |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB418070A (en) * | 1933-04-18 | 1934-10-18 | Automatic Electric Co Ltd | Improvements in or relating to traffic control systems |
| CN1050275A (en) * | 1990-10-22 | 1991-03-27 | 天津大学系统工程研究所 | Teach-yourself traffic controlling machine |
| CN201374128Y (en) * | 2008-12-27 | 2009-12-30 | 桂林电子科技大学 | Experimental teaching device with integrated traffic signal control |
| CN102005125A (en) * | 2010-12-10 | 2011-04-06 | 东南大学 | Discharging method of vehicles passing intersection and related design method and control system |
| CN105551271A (en) * | 2016-02-02 | 2016-05-04 | 浙江大学 | Traffic organization and signal control method facing left and right type staggered intersection |
| CN105810049A (en) * | 2016-05-06 | 2016-07-27 | 吉林大学 | Traffic signal control electronic experiment teaching device |
| CN206097595U (en) * | 2016-05-06 | 2017-04-12 | 吉林大学 | Traffic signals control electronic experiment teaching device |
| CN107221177A (en) * | 2017-07-11 | 2017-09-29 | 山东理工大学 | A kind of intersection signal timing method of the reverse changeable driveway of setting |
| CN109003443A (en) * | 2018-07-02 | 2018-12-14 | 北方工业大学 | Urban road intersection overflow control method based on geomagnetic detector |
| WO2021169353A1 (en) * | 2020-02-29 | 2021-09-02 | 华南理工大学 | Intersection traffic flow microcosmic control method under intelligent networking condition |
| WO2021232387A1 (en) * | 2020-05-22 | 2021-11-25 | 南京云创大数据科技股份有限公司 | Multifunctional intelligent signal control system |
| CN113963553A (en) * | 2021-10-20 | 2022-01-21 | 西安工业大学 | Road intersection signal lamp green signal ratio control method, device and equipment |
-
2022
- 2022-02-26 CN CN202210180132.1A patent/CN114550546A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB418070A (en) * | 1933-04-18 | 1934-10-18 | Automatic Electric Co Ltd | Improvements in or relating to traffic control systems |
| CN1050275A (en) * | 1990-10-22 | 1991-03-27 | 天津大学系统工程研究所 | Teach-yourself traffic controlling machine |
| CN201374128Y (en) * | 2008-12-27 | 2009-12-30 | 桂林电子科技大学 | Experimental teaching device with integrated traffic signal control |
| CN102005125A (en) * | 2010-12-10 | 2011-04-06 | 东南大学 | Discharging method of vehicles passing intersection and related design method and control system |
| CN105551271A (en) * | 2016-02-02 | 2016-05-04 | 浙江大学 | Traffic organization and signal control method facing left and right type staggered intersection |
| CN105810049A (en) * | 2016-05-06 | 2016-07-27 | 吉林大学 | Traffic signal control electronic experiment teaching device |
| CN206097595U (en) * | 2016-05-06 | 2017-04-12 | 吉林大学 | Traffic signals control electronic experiment teaching device |
| CN107221177A (en) * | 2017-07-11 | 2017-09-29 | 山东理工大学 | A kind of intersection signal timing method of the reverse changeable driveway of setting |
| CN109003443A (en) * | 2018-07-02 | 2018-12-14 | 北方工业大学 | Urban road intersection overflow control method based on geomagnetic detector |
| WO2021169353A1 (en) * | 2020-02-29 | 2021-09-02 | 华南理工大学 | Intersection traffic flow microcosmic control method under intelligent networking condition |
| WO2021232387A1 (en) * | 2020-05-22 | 2021-11-25 | 南京云创大数据科技股份有限公司 | Multifunctional intelligent signal control system |
| CN113963553A (en) * | 2021-10-20 | 2022-01-21 | 西安工业大学 | Road intersection signal lamp green signal ratio control method, device and equipment |
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