CN203838882U

CN203838882U - Traffic lights intelligent control experimental simulation device

Info

Publication number: CN203838882U
Application number: CN201420169937.7U
Authority: CN
Inventors: 刘俊; 郑志杰; 吴桂芳; 邱黄亮; 卜令娟
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2014-04-09
Filing date: 2014-04-09
Publication date: 2014-09-17
Anticipated expiration: 2024-04-09

Abstract

The utility model relates to a traffic lights intelligent control experimental simulation device. The traffic lights intelligent control experimental simulation device of the utility model comprises a PLC, 24 photoelectric sensors, 36 signal lamps including 12 red signal lamps, 12 yellow signal lamps and 12 green signal lamps, a start switch and a stop switch. According to the utility model, the photoelectric sensors are arranged on lanes of the waiting area, two photoelectric sensors exist on each lane, one of the two photoelectric sensors is arranged at the front portion of the lane, the other one of the two photoelectric sensors is arranged at the rear portion of the lane, and the distance between the two photoelectric sensors is 100 meters. On the assumption that each stopped car occupies a space of 5 meters and the display state of the straight lane is the same as the display state of the right turn lane, the waiting car number in each lane can be obtained according to the counting difference of the two photoelectric sensors, the larger value of the waiting car numbers of two lanes is taken as the waiting car number at this time in this direction, and then query is performed according to a fuzzy control table which is pre-stored into a storage unit of the PLC. According to the utility model, the waiting car number in each direction can be detected on a real-time basis, and the display time of the green lamps can be changed on a real-time basis according to the fuzzy control table to make cars pass through the crossroad as much as possible.

Description

Traffic lights Based Intelligent Control experimental simulation device

Technical field

The utility model belongs to urban traffic control field, is specifically related to a kind of intelligent optimization experimental simulation device of traffic lights.

Background technology

It is that people are in the problem of generally studying and inquiring into that the signal lamp of city intersection is controlled always.Along with economic fast development, the people who has vehicle in city is more and more, and a large amount of vehicles pour in road, has brought huge pressure to the traffic in city.Traffic lights are as the Main Means of crossroad relief of traffic, and its control performance and evacuation effect become particularly outstanding.By traffic lights are effectively managed and controlled, be one of important measures of alleviating traffic pressure.

Traffic intersection signal lamp control mode mainly uses timing controlled and traffic responsive to control at present, and this method is that people is signal period and the long green light time that pre-determines traffic lights, then carrying out in this timing scheme input signal controller.This control mode has been improved the traffic of intersection to a certain extent, but it is applicable to the more balanced situation of vehicle amount on road, and with respect to randomness and the time variation of traffic current in actual cities, this control mode is just difficult to play a role well.Traffic responsive is controlled at has good control effect in the situation that intersection vehicle saturation degree is lower and all directions vehicle flowrate diversity ratio is larger, and when vehicle saturation degree is higher and all directions traffic is more balanced, it is unable to do what one wishes that this control mode also seems.

Summary of the invention

The utility model is exactly cannot well meet traffic now for existing control mode, and a kind of traffic lights Based Intelligent Control experimental simulation device is provided.

The utility model comprises a FX _2N-48MR, 24 photoelectric sensors are as pick-up unit, and 36 signal lamps are respectively green each 12 of reddish yellow, starting switch T ₁, shutdown switch T ₂.

Starting switch T ₁one end connects FX _2Nthe input end X of-48MR ₀, the other end connects common port ground connection, shutdown switch T ₂one end connects FX _2Nthe input end X of-48MR ₁, the other end connects common port ground connection, 22 photoelectric sensor S ₁-S ₂₂one end connect respectively FX _2N22 input end X that-48MR is remaining ₂-X ₂₇, the other end all connects common port; S ₂₃and S ₂₄one end connect FX _0Nthe input end X of-8EX ₃₀and X ₃₁, the other end all connects common port ground connection; 36 signal lamps are arranged in respectively 12 groups according to three one group of RGB, and their one end is connected to FX _2N24 output terminal Y of-48MR ₀-Y ₂₇and FX _0N12 output terminal Y of-8EYR ₃₀-Y ₄₃; Their other end is all connected with the alternating voltage of 220V.

The utility model has designed a kind of device of Based Intelligent Control traffic lights, the wait vehicle number that detects all directions that it can be real-time, and according to the displaying time of the real-time change green light of fuzzy control table, the vehicle that allows of large degree passes through crossroad to the greatest extent.This device can effectively be alleviated traffic jam, improves the traffic capacity of crossroad.

Accompanying drawing explanation

Fig. 1 the utility model apparatus structure schematic diagram;

Fig. 2 photoelectric sensor is at the laying schematic diagram in track;

Fig. 3 phase sequence figure.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, this device comprises a FX _2N-48MR(FX _0N-8EX, FX _0N-8EYR is expansion module), 24 photoelectric sensors are as pick-up unit, and 36 signal lamps are respectively green each 12 of reddish yellow, starting switch T ₁, shutdown switch T ₂.

Starting switch T ₁one end connects FX _2Nthe input end X of-48MR ₀, the other end connects common port ground connection, shutdown switch T ₂one end connects FX _2Nthe input end X of-48MR ₁, the other end connects common port ground connection, 22 photoelectric sensor S ₁-S ₂₂one end connect respectively FX _2N22 input end X that-48MR is remaining ₂-X ₂₇, the other end all connects common port.S ₂₃and S ₂₄one end connect FX _0Nthe input end X of-8EX ₃₀and X ₃₁, the other end all connects common port ground connection.36 signal lamps are arranged in respectively 12 groups according to three one group of RGB, and their one end is connected to FX _2N24 output terminal Y of-48MR ₀-Y ₂₇and FX _0N12 output terminal Y of-8EYR ₃₀-Y ₄₃.Their other end is all connected with the alternating voltage of 220V.

After above-mentioned hardware has connected, the workflow of this device comprises following step:

The traffic lights at crossing are according to the demonstration of the phase sequence circulation of Fig. 3, after initialization, open starting switch, photoelectric sensor is measured the vehicle on road, and as Fig. 2, there are 2 photoelectric sensors in each track, one in front and one in back (sensor is above placed on before stop line, sensor is below placed on apart from the place of 100 meters, car), 24 photoelectric sensors are measured the vehicle number in 12 tracks, and photoelectric sensor imports input value into PLC main control computer.

PLC controller is integrated according to the input value of sensor, if each car stopping occupies the space of 5 meters, therefore the vehicle upper limit number of a track wait is 20, the quantity that front and back sensor detects is poor for waiting for the quantity of vehicle in this track, if the quantity that the sensor before certain direction detects is sometime 20, what sensor below detected is 30, this track wait vehicle is this moment 10, in such a way, draw the wait vehicle number in each track, general Through Lane is consistent with the show state of right-turn lane, two tracks are waited for to vehicle number higher value is as the wait vehicle number of this this direction of moment, according to the fuzzy control table that pre-deposits PLC storage unit, inquire about again, draw the displaying scheme of signal lamp.

Fuzzy control table

Shown in upper table, suppose in phase place 1 sometime, the wait vehicle of green light direction is 16, and the wait vehicle of phase place 2 green light directions is 8, the green light displaying time of this moment phase place 1 be 45s(due to the restriction of form length, wait for when vehicle is odd number the integer average that output green time is former and later two even numbers, when two inputs are all odd number, output green time is the integer average of tilted direction two numbers).

PLC controller is passed to result in the signal lamp of output terminal, and signal lamp shows and carries out according to output valve.

Claims

1. traffic lights Based Intelligent Control experimental simulation device, comprises a FX2N-48MR, and 24 photoelectric sensors are as pick-up unit, and 36 signal lamps are respectively green each 12 of reddish yellow, starting switch T1, and shutdown switch T2, is characterized in that:

Starting switch T1 one end connects the input end X0 of FX2N-48MR, the other end connects common port ground connection, shutdown switch T2 one end connects the input end X1 of FX2N-48MR, the other end connects common port ground connection, one end of 22 photoelectric sensor S1-S22 connects respectively 22 remaining input end X2-X27 of FX2N-48MR, and the other end all connects common port; One end of S23 and S24 is connected input end X30 and the X31 of FX0N-8EX, and the other end all connects common port ground connection; 36 signal lamps are arranged in respectively 12 groups according to three one group of RGB, and their one end is connected to 24 output terminal Y0-Y27 of FX2N-48MR and 12 output terminal Y30-Y43 of FX0N-8EYR; Their other end is all connected with the alternating voltage of 220V.