CN201498106U

CN201498106U - Intelligent traffic light

Info

Publication number: CN201498106U
Application number: CN200920227709XU
Authority: CN
Inventors: 吕稳; 陈锦; 魏树生
Original assignee: Individual
Current assignee: Zhou Zhen
Priority date: 2009-08-28
Filing date: 2009-08-28
Publication date: 2010-06-02
Anticipated expiration: 2019-08-28

Abstract

An intelligent traffic light comprises a plurality of the prior traffic lights (1). The intelligent traffic light is characterized in that the intelligent traffic light includes a plurality of geomagnetic sensors (2) and a controller (3); the plurality of geomagnetic sensors (2) are respectively arranged on the lower layer of each lane of a crossroad; the signal output terminals of the plurality of geomagnetic sensors are connected with I/O interfaces of a singlechip in the controller (3); and the I/O interfaces of the singlechip are also respectively connected with the plurality of traffic lights (1) of the crossroad. The intelligent traffic light has greatly improved traffic efficiency and intelligent level. Compared with the prior intelligent traffic light, the intelligent traffic light has the advantages of easy implement of software and low hardware cost, and can well exert the advantage under the condition of less vehicles and passengers.

Description

Intelligent traffic lamp

Technical field

The utility model belongs to the traffic technique field, particularly a kind of intelligent traffic lamp.

Background technology

Traffic lights are as the indispensable facility of urban traffic control, maintenance management traffic order greatly.Along with growth in the living standard, the domestic automobile owning amount is more and more, and the urban transportation blockage problem is more and more serious, and the congested in traffic problem that solves the city is more and more urgent.Traffic lights play an important role in this traffic environment.

According to statistics: the above annual direct and consequential damage because of traffic congestion in big city of China million people mouth is about 1,600 hundred million yuan, be equivalent to about 2% of gross domestic product (GDP), and the annual because economic loss of traffic problems of the U.S. also up to 2,370 hundred million dollars about.The obstruction that this shows traffic has brought enormous economic loss to people.

And existing traffic lights mostly is fixed routine control, adopts the working method of regularly switching, exactly change the state of traffic lights at interval in turn by certain hour, its time all configures, no matter be wagon flow peak or low ebb, the time of traffic lights all immobilizes.This mode efficient is very low.When wagon flow be unidirectional or night driving more after a little while, driver's green light such as have to stop, under the less situation of the stream of people in night, the time that traffic lights has still distributed the pedestrian to go across the road, make traffic efficiency become very low, the traffic lights control of impersonalityization that also seems simultaneously.Adopt timing controlled often to cause road effectively to use waste of time, it is less green light direction vehicle to occur, and red light direction vehicle overstocks.The actual conditions that it ignores vehicular traffic number on the current road change, and its maximum defective just is can not satisfy driver and passerby's actual needs when road conditions change, and the lighter causes temporal waste, and weight person directly causes traffic jam.

The method that a kind of use " fuzzy control " technology control traffic lights is arranged in addition.Can judge the traffic lights time interval automatically according to vehicle dynamic situation on the both direction of crossroad,, reduce the traffic jam at road junction to guarantee maximum vehicle flowrate.This method can improve traffic efficiency to a certain extent, but the cost height, the bad statistics of flow, wherein flow and time relation are also bad determines, and under the less situation of people's car, traffic efficiency is still not high.

More senior in addition is to handle with camera, and like that not only cost height, and data volume is big, and software complexity, price are also very expensive.

Summary of the invention

The purpose of this utility model provides a kind of current rate height of vehicle, can reduce the intelligent traffic lamp of waiting for green time.

Described intelligent traffic lamp, comprise a plurality of existing traffic lights, it is characterized in that: described intelligent traffic lamp is provided with a plurality of geomagnetic sensors and a controller, described a plurality of geomagnetic sensor is located at each track lower floor of crossroad respectively, the signal output part of a plurality of geomagnetic sensors is connected with the I/O interface of single-chip microcomputer in the controller by lead, and the I/O interface of single-chip microcomputer also is connected with a plurality of traffic lights in crossroad respectively in the controller.

Be provided with 8 single-chip microcomputers in the described controller, be provided with in the single-chip microcomputer: the Flash of 32K, the RAM of 1K, the UART of a 4 * 8+4=36 I/O interface and a full duplex.

Be respectively equipped with the pedestrian's street crossing request key on the lamp stand of a plurality of traffic lights, button all is connected with the I/O interface of single-chip microcomputer in the controller respectively by lead.

Described geomagnetic sensor adopts micro-nano earth magnetism twin shaft sensor MMC212 * M.

Single-chip microcomputer in the described controller has traffic lights general control pattern, Based Intelligent Control pattern by software setting, and the Based Intelligent Control pattern comprises: pedestrian's street crossing request key program, the current program of single intersection bicycle, part crossing have pass through program, 8 crossings of car that the car journey of passing through is arranged entirely.

The utility model can be provided with and be divided into general mode and intelligent mode, general mode and existing traffic be compatible.Intelligent mode is then understood the situation of road vehicle in real time by sensor, control the state of traffic.The host computer of the selection of pattern by the PC platform realize, also can be artificial set the time period switch mode automatically more earlier.

The beneficial effects of the utility model are: 1. compare with the existing method that detects with telefault, having volume, little (the inductance pick-up unit is generally cylindric, the high 175mm of diameter 55x), advantage easy for installation, highly sensitive, and can also remedy the problem that inductance can not detect static car and be subjected to external environmental interference etc. easily.

2.MMC212xMG the sense vehicle that energy is sensitive by the processing of single-chip microcomputer, also can be monitored road traffic and congested conditions in real time, and feed back to relevant departments simultaneously, offers the driver again.

3. compare with existing traffic lights: its traffic efficiency and intelligent degree improve greatly.Compare with existing intelligent traffic light, its software realizes that hardware cost is also low, especially under the less situation of people's car, more can bring into play his advantage easily.

Description of drawings.

Fig. 1 is a theory diagram of the present utility model,

Fig. 2 is the utility model installation site synoptic diagram at the parting of the ways,

Fig. 3 is the geomagnetic sensor schematic diagram,

Fig. 4 is controller principle figure.

Among the figure: 1-traffic lights, 2-geomagnetic sensor, 3-controller, 4-single-chip microcomputer, 5-button.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing, among Fig. 1,2, described intelligent traffic lamp, comprise a plurality of existing traffic lights 1, it is characterized in that: described intelligent traffic lamp is provided with a plurality of geomagnetic sensors 2 and a controller 3, described a plurality of geomagnetic sensor 2 is located at each track lower floor of crossroad respectively, the signal output part of a plurality of geomagnetic sensors 2 is connected with the I/O interface of single-chip microcomputer in the controller 3 by lead, and the I/O interface of single-chip microcomputer also is connected with a plurality of traffic lights 1 in crossroad respectively in the controller 3.

Be provided with 8 single-chip microcomputers in the described controller 3, be provided with in the single-chip microcomputer: the Flash of 32K, the RAM of 1K, the UART of a 4 * 8+4=36 I/O interface and a full duplex.

Be respectively equipped with pedestrian's street crossing request key 4 on the lamp stand of a plurality of traffic lights 1, button 4 all is connected with the I/O interface of single-chip microcomputer in the controller 3 respectively by lead.

Described geomagnetic sensor 2 adopts micro-nano earth magnetism twin shaft sensor MMC212 * M.Single-chip microcomputers in the described controller 3 have traffic lights general control pattern, Based Intelligent Control pattern by software setting, and the Based Intelligent Control pattern comprises: pedestrian's street crossing request key program, the current program of single intersection bicycle, part crossing have pass through program, 8 crossings of car that the car program of passing through is arranged entirely.

Its course of work: geomagnetic sensor 2 every 0.5S run-down streets among the figure, with having or not of real-time detection crossing vehicle; Redness is button among the figure.Concrete effect is: at midnight, when perhaps the stream of people is few, start this button pattern.After the startup, traffic lights just can not distribute the time of crossing street to the pedestrian, always is that just vehicle is running.When the people wants to go across the road, press this key, traffic lights then can distribute people's line time of 20s (unfixing, as can be provided with) at once.And this button also can be invalid within ensuing 2 minutes (can set), removes after 2 minutes;

The bicycle situation: when B has car, and other tracks are not when there be car, no matter the lights state of this moment all switches to the current led state (specifically be B-C, B-E, B-G are green light) of this car at once.If next the B track does not have car within 10 seconds, then start general mode at once, if next detect other tracks car is arranged, then enter many cars situation;

8 road junctions do not have under the situation of car entirely: such as detecting B a moment and D has car, so detection signal the time, a sequencing is arranged certainly, establish B earlier, switch to the current state of B car so earlier, then at the state that detects the B mouth, if in 40s, do not have the time of car to surpass 10s (can set), then switch to the current state of D car, at once if car is arranged behind the B always, behind 40s (can set), switch to the current state of D car so.Other situations are analogized.

All there is the situation of car at 8 road junctions: then be open to traffic by general mode, up to 8 road junctions car do not arranged entirely, then be transferred to the situation of (5).

The model selection of traffic lights: traffic lights general mode, intelligent mode etc.

Claims

1. intelligent traffic lamp, comprise a plurality of existing traffic lights (1), it is characterized in that: described intelligent traffic lamp is provided with a plurality of geomagnetic sensors (2) and a controller (3), described a plurality of geomagnetic sensor (2) is located at each track lower floor of crossroad respectively, the signal output part of a plurality of geomagnetic sensors (2) is connected by the I/O interface of lead with the interior single-chip microcomputer of controller (3), and the I/O interface of the interior single-chip microcomputer of controller (3) also is connected with a plurality of traffic lights in crossroad (1) respectively.

2. intelligent traffic lamp according to claim 1 is characterized in that: be provided with 8 single-chip microcomputers in the described controller (3), be provided with in the single-chip microcomputer: the Flash of 32K, the RAM of 1K, the UART of a 4 * 8+4=36 I/O interface and a full duplex.

3. intelligent traffic lamp according to claim 1, it is characterized in that: be respectively equipped with pedestrian's street crossing request key (4) on the lamp stand of a plurality of traffic lights (1), button (4) all is connected with the I/O interface of the interior single-chip microcomputer of controller (3) respectively by lead.

4. intelligent traffic lamp according to claim 1 is characterized in that: described geomagnetic sensor (2) adopts micro-nano earth magnetism twin shaft sensor MMC212 * M.