CN104064040A - Traffic signal control machine with synergistic dispersion function - Google Patents
Traffic signal control machine with synergistic dispersion function Download PDFInfo
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- CN104064040A CN104064040A CN201310087209.1A CN201310087209A CN104064040A CN 104064040 A CN104064040 A CN 104064040A CN 201310087209 A CN201310087209 A CN 201310087209A CN 104064040 A CN104064040 A CN 104064040A
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Abstract
The invention provides a traffic signal control machine with a synergistic dispersion function. The traffic signal control machine is characterized in that a signal machine is arranged at each intersection; each signal machine is provided with a microprocessor and a peripheral circuit of the microprocessor; a wireless communication interface of each signal machine is connected with a public wireless network; a detector signal input interface is connected with a traffic flow detector arranged at an intersection; a signal light control signal output interface is connected with a signal light arranged at an intersection; and the signal machines of multiple intersections are in communication connection through the connection of the wireless communication interfaces and the public wireless network. According to the invention, in sub regions with high association in a city road network, when traffic congestion occurs at an important intersection, the surrounding signal machines can carry out synergistic control on the display state of traffic lights of the intersection to realize traffic dispersion.
Description
Technical field
The invention belongs to traffic signals opertaing device, relate in particular to a kind of equipment of controlling multiple crossroad traffic signal lamps.
Background technology
In the intelligent control system of road traffic, crossing traffic signal controlling machine is crucial equipment.The traffic signals control in domestic each city at present is roughly divided into two types: the one, and crossing level signal controlling, the 2nd, centre grade is coordinated to control.The former is separately by the traffic signals at this crossing of each intersection annunciator control; Latter is realized the concentrated coordination control to each crossing traffic signal by control center.Existing intelligent signal machine itself does not possess the coordinated control function with periphery teleseme.Want the coordination control of feasible region to realize by the mode of setting up central control system.In city road network there is association in various degree in the traffic flow at each crossing, and independent crossing its limitation of level signal controlling is apparent.But, build control center realize concentrate coordinate control for many application, because initial investment, technical difficulty and daily O&M cost are higher, not only financial resources manpower is difficult to bear, and input-output efficiency also may not be worthwhile, this be because:
(1) traffic system be one random, time become, the complication system of restriction in many ways, be difficult to describe the different traffic behavior in various places with unified model.Conventionally mathematical analysis method is difficult to consider various influence factors comprehensively, and the parametric solution of obtaining may not necessarily ensure the actual coordination control effect obtaining, if deal with the failure that even can cause coordination to be controlled improperly;
(2) many optimization indexs, as delay, stop frequency and discharge etc. are difficult to directly record, be generally to calculate acquisition by analytic model, but error are larger in mixed traffic flow situation, have reduced the confidence level of prioritization scheme;
(3) a large amount of application practices shows, in the time that the distance between adjacent two crossings exceedes 800 meters, affect the stable of phase differential because wagon flow speed is difficult to determine, and usually have some immesurable branch road wagon flow impacts on the way, coordinate to control on the contrary not as controlling separately separately.
Summary of the invention
The invention provides a kind of collaborative traffic signal controlling machine of dredging function that has, its objective is and solve the shortcoming that prior art exists, make in the strong subarea of city road network relevance, in the time of key crossing generation traffic congestion, can make periphery teleseme Collaborative Control crossroads traffic light show state and relieve traffic congestion.
The technical solution adopted for the present invention to solve the technical problems is:
There is the collaborative traffic signal controlling machine of dredging function, it is characterized in that:
At each crossing signalization machine, teleseme has the peripheral circuit of microprocessor and microprocessor, and the set wireless communication interface of teleseme is connected with public wireless network, detector signal input interface is connected with the Detector for Traffic Data of Vehicles that crossing arranges, signal lamp control signal output interface is connected with the signal lamp that crossing arranges;
The teleseme at multiple crossings is by wireless communication interface communication connection each other with being connected of public wireless network.
Can also have middle control computer, middle control computer communicates to connect with the teleseme at each crossing with being connected of public wireless network by its wireless communication interface.
Usefulness of the present invention is:
The present invention is between crossing level and centre grade signal controlling signal controlling between the two.What realize this control is to have the collaborative shunting in subarea to dredge the teleseme of function.They are deployed in the subarea that crossing relevance is strong, under normal traffic situation, move with crossing level teleseme separately, but in subarea when key crossing generation traffic congestion, by automatic detection or manually send instruction, the teleseme at this crossing can occur by trigger event, link each intersection annunciator in subarea according to the shunting prediction scheme operation of original setting by wireless link, the collaborative control parameter (cycle, split or phase differential) of changing relevant crossing, nationality is to dredge wagon flow, until relieve congestion recovers former running status.The teleseme of this patent has traditional single intersection from main control and the function of accepting the unified control of control center.Significantly different from classical signal machine, the teleseme of this patent possesses under the condition that there is no control center, in the time that traffic congestion occurs at crossing, can communicate and the function of coordinating to control with periphery teleseme voluntarily.
Use and thisly itself there is the collaborative benefit of dredging function signal machine in subarea and be:
1, this system has crossing level signal optimizing and the collaborative function of dredging of region class concurrently, when traffic congestion, detect or manual intervention by automatic, carry out fast prediction schemeization scheduling, can adapt to many small cities, or the actual needs of the outskirts of a town in big or middle city and new district traffic signals control engineering.Investment and technical sophistication degree that its very big reduction initial stage builds;
2, sort signal machine possesses the interface of networking with center control machine equally, coordinates once needs and condition maturity can be used as centre grade equally the FEP of controlling, and has adapted to preferably the transition demand of urban traffic signal control system Minute stage construction.It also provides a solution for realizing distributed control in addition;
3, between teleseme in loose coupling state, adopt each other public wireless network communication, do not need the corresponding in real time of Millisecond, the traffic is few, daily communications cost and maintenance difficulties are very low.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the embodiment of the present invention 1 structural drawing;
Fig. 2 is the embodiment of the present invention 2 structural drawing.
Embodiment
As shown in Figure 1, be embodiments of the invention 1, the present invention has the collaborative traffic signal controlling machine of dredging function, and the existing intelligent signal machine of hardware configuration of its individual signals machine is basically identical, mainly by embedded-type ARM microprocessor, peripheral circuit, and external unit composition.Microprocessor is the core of system hardware; Peripheral circuit is mainly by power management module, clock module, flash memory FLASH, random access memory ram, and read only memory ROM composition.These are the necessary equipment of the normal work of a microprocessor; External unit is configuration as required, as communication interface (communication interface comprises 2.5G or 3G wireless communication interface (GPRS, CDMA, TD-SCDMA, WCDMA, CDMA2000) is optional).In addition, the peripheral topworks of teleseme need to receive the each lane flow detector data in crossing, control the state of crossing all directions signal lamp, thereby external unit also comprises, and corresponding detector signal input interface is connected with the Detector for Traffic Data of Vehicles that crossing arranges, signal lamp control signal output interface is connected with the signal lamp that crossing arranges.The each module of system adopts single chip computer architecture, and operating system adopts built-in Linux.
The present invention is different from prior art individual signals lamp hardware: communication interface at least will comprise wave point (2.5G or 3G) here.
In teleseme function of the present invention, except possessing the working methods such as the Huang sudden strain of a muscle, pedestrian's request, fixed cycle, multi-period timing of current intelligent signal machine, online, induction, increase collaborative this working method of dredging in subarea.
The technology path of its realization is:
In the stronger (subarea, road network subarea of relevance, it is exactly a region, in this region, wagon flow relevance is strong, and subarea comprises multiple crossings) each crossing deployment sort signal machine, the teleseme at multiple crossings is by communication interface communication connection each other with being connected of public wireless network.
Crossing configuration Detector for Traffic Data of Vehicles in subarea, nationality is automatically to find the generation of traffic congestion.According to usual observation and experience accumulation, dredge prediction scheme (persistence in teleseme, but at any time can manual amendment) toward the various quick shuntings of each teleseme input respectively by manual type in advance.When these these crossings of prediction scheme separate provision certain direction generation traffic congestions, the control parameter (cycle, split or phase differential etc.) that itself and adjacent intersection need to change.When teleseme moves usually, carry out crossing level signal controlling, to each other without coupling.Only in the time that key crossing detects congested generation, or while manually giving an order, trigger corresponding prediction scheme and carry out.At this moment, there is congested intersection annunciator and send and control parameter modification instruction by wireless communication link road direction coherent signal machine, make it collaborative and dredge wagon flow, until no longer congested, the connection between ring off signal machine, operation returns to normal.If same time signal machine is received two or more collaborative instructions of dredging, according to the priority selection execution of regulation in advance.
In the time of the signal lamp control prediction scheme of working out in teleseme, should note comprising following components:
1, work in coordination with and dredge the control parameter that prediction scheme is adjusted:
Realize in subarea congested collaborative dredging, key is not affect traffic safety, considers under the prerequisite of driver and pedestrian's psychological bearing capability simultaneously, improves the discharge of congested direction wagon flow, reduces influx.Following control parameter is adjusted in the effect that teleseme can be brought into play in this process exactly:
Cycle: refer to that signal light color changes, show required time of circulation, also the title cycle long, i.e. red, yellow, and green lamp time sum.When congested, conventionally can extend the signal period in subarea, to reduce the lost time of phase transition, improve crossing percent of pass.
Phase place: i.e. signal phase, the basic mode of intersection signal control is that the transit time in one-period is divided into two or more time periods, each time period forms a signal phase.Within the time period of a phase place, only allow the wagon flow of specific one or more flow directions to pass through, the now combination of the shown different light colors of each entrance driveway different directions is called a signal phase.
Split: the ratio that refers to each phase place green time in long in the cycle and cycle length.
Phase differential: have the relevant crossing that same period is long, the start-up time of two dependent phases on equidirectional is poor, is called phase differential.
In shunting prediction scheme, be manually rule of thumb to set in advance with mathematical model to these adjustment of controlling parameter of each crossing.Proved wise selection by many traffic control engineerings in conjunction with expert intelligence.
2, set the teleseme communication protocol of dredging for collaborative:
When congested generation, between teleseme, transmit the control parameter of adjusting.Communication protocol is therebetween deferred to " data communication protocol between traffic signal controlling machine and host computer " standard GB/T/T20999-2007.
3, adopt public wireless network to carry out data communication:
Because teleseme works in loose couplings state, the netted communication of the pattern of wants each other, connect once in a while the traffic few, do not need the real-time response of Millisecond yet, for reducing investment, reduce O&M cost, collaborative dredging adopts public wireless network communication, and communication interface comprises 2.5G or 3G wireless communication interface (GPRS, CDMA, TD-SCDMA, WCDMA, CDMA2000 optional).From now on, perfect along with Internet of Things agreement, communications platform can framework on Internet of Things.
4, set the algorithm of a set of judgement traffic congestion:
Because collaborative dredging system is not operation under control center's monitoring in real time, mainly carry out prediction scheme shunting dredging by automatic detection, interlock mode voluntarily, thereby in the teleseme of key crossing, need to realize the algorithm of judging traffic congestion.Judge according to being mainly to carry out synthetic determination according to the detected value of following parameters:
Queue length: continuous some cycle detections, to waiting for that current vehicle queue length surmounts a certain threshold value, can be used as the congested important evidence of judgement;
Coefficient of flow: the ratio of road actual flow and saturation volume, it is the important parameter that calculates signal timing dial, is again a yardstick weighing crossing degree of congestion;
Incur loss through delay: refer to the loss of time that the restriction of traffic conflict or signal controlling facility brings to vehicle.It is an important parameter that calculates signal timing dial and weigh the current effect in crossing.
As shown in Figure 2, embodiments of the invention 2, embodiment 2 has added some equipment as different from Example 1, on teleseme, configure as required external unit, as thering is middle control computer, middle control computer communicates to connect with the teleseme at each crossing with being connected of public wireless network by its wireless communication interface.Middle control computer can be smart mobile phone or computing machine, can be also the combination of smart mobile phone and computing machine.In Fig. 2, smart mobile phone and computing machine are combined into middle control computer and play the effect of middle control computer.Can on-the-spot connect PC by network interface and utilize display and keyboard operation teleseme.
The technology path of its realization is:
In the stronger (subarea, road network subarea of relevance, it is exactly a region, in this region, wagon flow relevance is strong, subarea comprises multiple crossings) each crossing deployment sort signal machine, the teleseme at multiple crossings is by communication interface communication connection each other with being connected of public wireless network, and teleseme and middle control computer (middle control computer can be smart mobile phone or computing machine, also can be the combination of smart mobile phone and computing machine, middle control computer communicates to connect with the teleseme at each crossing with being connected of public wireless network by its wireless communication interface) be connected, to can cut if desired manual intervention.
Crossing configuration Detector for Traffic Data of Vehicles in subarea, nationality is automatically to find the generation of traffic congestion.According to usual observation and experience accumulation, dredge prediction scheme (persistence in teleseme, but at any time can manual amendment) toward the various quick shuntings of each teleseme input respectively by manual type in advance.When these these crossings of prediction scheme separate provision certain direction generation traffic congestions, the control parameter (cycle, split or phase differential etc.) that itself and adjacent intersection need to change.When teleseme moves usually, carry out crossing level signal controlling, to each other without coupling.Only in the time that key crossing detects congested generation, or while manually giving an order by middle control computer, trigger corresponding prediction scheme and carry out.At this moment, there is congested intersection annunciator and send and control parameter modification instruction by wireless communication link road direction coherent signal machine, make it collaborative and dredge wagon flow, until no longer congested, the connection between ring off signal machine, operation returns to normal.If same time signal machine is received two or more collaborative instructions of dredging, according to the priority selection execution of regulation in advance.
When congested generation, between teleseme, or need to be connected communication between smart mobile phone and computing machine and teleseme, transmit the control parameter of adjusting.Communication protocol is therebetween deferred to " data communication protocol between traffic signal controlling machine and host computer " standard GB/T/T20999-2007.
Because teleseme works in loose couplings state, the netted communication of the pattern of wants each other, connect once in a while the traffic few, do not need the real-time response of Millisecond yet, for reducing investment, reduce O&M cost, collaborative dredging adopts public wireless network communication, and communication interface comprises 2.5G or 3G wireless communication interface (GPRS, CDMA, TD-SCDMA, WCDMA, CDMA2000 optional).The collaborative dredging system in subarea needs manual intervention (by smart mobile phone or computing machine), carries out prediction scheme setting and amendment, manually excites if desired prediction scheme to carry out.Smart mobile phone or computing machine and the public wireless network of the same employing of communication between teleseme.From now on, perfect along with Internet of Things agreement, communications platform can framework on Internet of Things.
Claims (2)
1. there is a collaborative traffic signal controlling machine of dredging function, it is characterized in that:
At each crossing signalization machine, teleseme has the peripheral circuit of microprocessor and microprocessor, and the set wireless communication interface of teleseme is connected with public wireless network, detector signal input interface is connected with the Detector for Traffic Data of Vehicles that crossing arranges, signal lamp control signal output interface is connected with the signal lamp that crossing arranges;
The teleseme at multiple crossings is by wireless communication interface communication connection each other with being connected of public wireless network.
2. as claimed in claim 1 have a collaborative traffic signal controlling machine of dredging function, it is characterized in that: have middle control computer, middle control computer communicates to connect with the teleseme at each crossing with being connected of public wireless network by its wireless communication interface.
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| CN201310087209.1A CN104064040A (en) | 2013-03-19 | 2013-03-19 | Traffic signal control machine with synergistic dispersion function |
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| CN105810049A (en) * | 2016-05-06 | 2016-07-27 | 吉林大学 | Traffic signal control electronic experiment teaching device |
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| CN109767630A (en) * | 2019-04-12 | 2019-05-17 | 江苏广宇科技产业发展有限公司 | A kind of traffic signal control system based on bus or train route collaboration |
| CN110610615A (en) * | 2018-06-14 | 2019-12-24 | 华为技术有限公司 | Traffic control method and device |
| CN115424459A (en) * | 2022-08-29 | 2022-12-02 | 北京东土正创科技有限公司 | Trunk line coordination method and storage medium |
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