CN100337257C - Distribution-type four-stage structure traffic signal control system - Google Patents
Distribution-type four-stage structure traffic signal control system Download PDFInfo
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- CN100337257C CN100337257C CNB2005100406209A CN200510040620A CN100337257C CN 100337257 C CN100337257 C CN 100337257C CN B2005100406209 A CNB2005100406209 A CN B2005100406209A CN 200510040620 A CN200510040620 A CN 200510040620A CN 100337257 C CN100337257 C CN 100337257C
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Abstract
The present invention discloses a distribution-type four-stage structure traffic signal control system, which relates to a distribution-type four-stage structure traffic signal control system and a method applied in regional road networks. According to a design scheme provided by the present invention, the distribution-type four-stage structure traffic signal control system comprises a central control stage, a regional control stage and a key crossing control stage. The present invention is characterized in that the lower side of the critical crossing control stage is provided with a crossing control stage and a virtual crossing control stage, wherein the central control stage adopts first-stage control; a main device is a central control machine; the regional control stage adopts second-stage control; the main device is a regional control machine in charge of coordinating and controlling control machines at critical crossings; the critical crossing control stage adopts third-stage control; the main device is a critical crossing control machine in charge of coordinating the crossing control machine or the virtual crossing control machine; the crossing control stage or the virtual crossing control stage adopts fourth-stage control, and the main device is a crossing control machine in charge of controlling the on-off stage of the crossing traffic signal lamps. In addition, the virtual crossing control machine only logically exists on software and does not physically exist.
Description
Technical field
Patent of the present invention relates to a kind of distribution-type four-stage structure traffic signal control system and the method that is applied in the area road road network.
Background technology
At present, the coordinating control of traffic signals of area road road network generally adopts the traffic signal control system of centralized secondary structure or semi tertiary structure.Wherein, the typical case of centralized secondary structure traffic signal control system representative is the SCOOT system of Britain, and control structure as shown in Figure 1.System is divided into central authorities' control and the control of crossing control secondary.The major equipment of central authorities' controlled stage is central controller, and the major equipment of crossing controlled stage is the crossing controller, and the crossing controller is directly connected to center control machine by optical fiber or cable communication channel.The vehicle that center control machine is uploaded according to each crossing controller arrives information, employing data model and optimized Algorithm, final optimization pass obtains a new controlling schemes (ratio and the green light starting time difference when comprising signal period length, green light) and generates each belisha beacon light on and off time, deliver to corresponding crossing controller respectively down, control the light on and off of crossing traffic signal lamp by the crossing controller.The center control machine of this system need be handled a large amount of vehicles and arrive information, and carries out the heavy calculating of traffic control scheme optimization, Control on Communication and operation setting work, and center control machine is the core cell of total system, the task arduousness of bearing.
When being applied in large-and-medium size cities traffic signals control, centralized control structure system often needs to coordinate simultaneously to control up to a hundred even thousands of crossing controllers, the center control machine of system will be born very heavy evaluation work, certainly will require center control machine not only will possess very high computing velocity but also will possess very big memory capacity, and the communication channel that requires numerous connection center control machines and crossing controller not only needs higher communication frequency but also the higher communication quality of needs, only in this way could guarantee the normal operation of system.In case center control machine breaks down, total system will shine by paralysis.The system of this structure is all very high to the requirement of hardware environment and communication channel, and the equipment input of requirement and communications cost are all very high.
The typical case of semi tertiary structure traffic signal control system representative is an Australian SCATS system, and control structure as shown in Figure 2.System is divided into central control, Region control and three grades of controls of crossing control.Central authorities' controlled stage is highest controlled stage, and the crossing controlled stage is the lowermost level controlled stage.The major equipment of central authorities' controlled stage is central controller, and the major equipment of Region control level is the Region control machine, and the major equipment of crossing controlled stage is the crossing controller.The Region control machine both can be located at same place with central controller, also can divide to be located at different places, had certain distributivity geographically.
The crossing controller is the specialized equipment that is installed on outdoor crossing, and it is controlled the light on and off of all signal lamps of crossing all directions, and the vehicle of each inlet of acquisition process crossing arrives information simultaneously.Region control machine and central controller are indoor equipmenies, and they all are the top-end computers that system controlling software has been installed.The Region control machine can connect nearly 250 crossing controllers, the Region control machine is mainly finished the traffic control function, the traffic control scheme (ratio and the green light starting time difference when comprising Cycle Length, green light) that the vehicle arrival information optimization that it is uploaded based on each crossing controller that it connected obtains each crossing generates each crossing traffic signal lamp light on and off time, be issued to corresponding crossing controller respectively, control the light on and off of crossing traffic signal lamp by the crossing controller.
Central authorities' controller is a computing machine of carrying out management role, can connect nearly 64 Region control machines, the database of its maintenance system, write down operation configuration, running status, the vehicle that each Region control machine and crossing controller upload and reach various information such as information, for traffic administration man analysis decision-making.On the communication ways of connecting, can adopt serial ports, network according to practical situations between Region control machine and crossing controller, transmission medium can be telephone wire, optical fiber.Central authorities' controller adopts network to link to each other with the Region control machine, and communication speed is faster, and data volume is also bigger.
Though the center control machine and the Region control machine of this semi control structure system are shared on task to some extent, but the Region control machine still needs to coordinate simultaneously to control dozens of even up to a hundred crossing controllers, the Region control machine not only needs collective analysis and handles a large amount of vehicles to arrive information, dynamically determine Cycle Length but also need carry out a large amount of computation optimization work, ratio and green light starting these controlled variable of time difference during green light, real-time processing speed and job requirement to the Region control machine are still bigger, to having relatively high expectations of hardware environment and communication line, equipment investment and communications cost are still higher.
Summary of the invention
The objective of the invention is to seek a kind of distribution-type four-stage structure traffic signal control system, not only can reduce the construction and the maintenance cost of traffic signal control system, but also can realize the more efficiently coordinating control of traffic signals of road network.
According to design proposal provided by the present invention, distribution-type four-stage structure traffic signal control system comprises that central controlled stage, Region control level, key crossing controlled stage is characterized in that: the crossing controlled stage is set below the key crossing controlled stage or sets up the virtual crossing controlled stage; Wherein, central controlled stage is one-level control, and major equipment is central controller, is arranged on the urban traffic control center, is responsible for coordinating the control area controller; The Region control level is second level control, and major equipment is the Region control machine, is arranged on urban traffic control center or branch center, is responsible for coordinating control key crossing controller; The key crossing controlled stage is third level control, and major equipment is the key crossing controller, is arranged on the road junction of predetermined key, is responsible for coordinating crossing controller or virtual crossing controller; Crossing controlled stage or virtual crossing controlled stage are fourth stage control, and major equipment is the crossing controller, is arranged on road junction, be responsible for controlling the bright of crossing traffic signal lamp or going out, and the virtual crossing controller only exists on software logic, is non-existent physically.
Central authorities' controller connects nearly 48 Region control machines by optical fiber or cable communication channel, each Region control machine connects nearly 48 key crossing controllers by optical fiber or cable communication channel, each key crossing controller connects by the cable communication channel and is positioned at the key crossing periphery or is positioned at nearly 10 crossing controllers or virtual crossing controller on same the turnpike road, and each crossing controller or virtual crossing controller are responsible for lighting or are extinguished connected a plurality of traffic lights.Select nearly 48 Region control machines of a central controller control, each Region control machine control reaches the equilibrium consideration that 48 key crossing controllers mainly are based on computing ability, memory capacity and the cost of investment of controller, only need to select CPU for use be that P4 or above PC server just can be competent at a job for central controller or Region control machine under this requirement, can reduce equipment investment cost greatly.Select the control of key crossing controller nearly 10 crossing controllers or virtual crossing controller be mainly based on following 2 considerations: 1, the control core cell of key crossing teleseme is an industrial control computer, just energy is competent at a job need to select at present inexpensive PC/104 industrial control computer for use following of this requirement, not only controlled cost, and very strong operational reliability has been arranged; When 2, the control of key crossing teleseme is more than 10 above crossing controllers or virtual crossing teleseme, not only coordinate the control effect and be difficult to ensure, and the communication channel construction cost is higher.
When the junction perimeter that will control when the key crossing controller and the spacing of key crossing are no more than 100 meters, do not establish the crossing controller at these crossings, the signal lamp that is installed in these crossings is directly connected to the key crossing controller by umbilical cable, when not establishing the crossing controller, the embedded software system of key crossing controller logically still sets up the virtual crossing controller for these crossings, and the key crossing controller does not exist physically by these but the signal lamp at these crossings is lighted or extinguished to the virtual crossing controller that exists on software logic.
The signal period that crossing controller or virtual crossing controller issue based on key crossing, the green light starting time difference, when obtaining the green light at this crossing by its built-in Control Software optimization than after, generate the light on and off time of belisha beacon, the light on and off of all signal lamps of control all directions, the vehicle of these crossing all directions of acquisition process arrives information simultaneously, forms elementary information uploading and gives the key crossing controller.
The elementary information that Cycle Length variation range that the key crossing controller issues based on the Region control machine and crossing controller or virtual crossing controller are uploaded, obtain the Cycle Length and the green light starting time difference at each crossing that this key crossing controller connected by its built-in Control Software optimization, the elementary information that each crossing controller or virtual crossing controller are uploaded carries out being uploaded to the Region control machine after aggregation process forms intermediate information simultaneously.
Region control machine and central controller are indoor equipmenies, the built-in Control Software of Region control machine, mainly finish and coordinate control and data processing function, the intermediate information that it is uploaded based on each key crossing controller that it connected to determine on a macro scale the variation range of the Cycle Length of each key crossing controller, and the intermediate information that each key crossing controller is uploaded is carried out aggregation process and formed high-level information simultaneously.
Central authorities' controller is a computing machine of carrying out management role, the database of its maintenance system, the high-level information that operation configuration, running status and each Region control machine of record and each Region control machine of storage administration and each key crossing controller uploaded is for traffic administration man analysis decision-making.
Disclosed by the invention is a kind of traffic signal control system of full distributed level Four control structure, at first it disperses on physical arrangement, central authorities' controlled stage is located at indoor same place or different places with the Region control level, and the key crossing controlled stage is located at outdoor different place with the crossing controlled stage; Secondly in function, also distribute, central authorities' controller is finished the execution management role, the Region control machine is finished the task of macro coordination control key crossing controller, the key crossing controller is finished the computation optimization work of the traffic control parameter Cycle Length and the green light starting time difference, the crossing controller is finished the computation optimization work of traffic control parameter green light time ratio, and the overall work amount of system has more balancedly been distributed to central controller, Region control machine, key crossing controller and crossing controller.
Compared with the prior art the present invention has, 1, system adopts that distributed control and distributed information are handled, computation optimization, computing power and calculated capacity requirement to central controller, Region control machine, key crossing controller and crossing controller are all lower, can obviously save the equipment input cost.2, the crossing controller communicates with the key crossing controller nearby and is connected, and need not long distance and inserts traffic control center or branch center, and is less to taking of communication line resource, can save the investment construction cost of communication line in a large number.3, system is relatively low to the transfer rate and the reliability requirement of communication line and equipment, in case the interior trunk communication line with outdoor equipment of junction chamber breaks down, key crossing controller and crossing controller or virtual crossing controller be operate as normal still.4, control is flexible, reliability is high, and Installation and Debugging are convenient.
Description of drawings
Fig. 1 is the control structure figure of SCOOT system.
Fig. 2 is the control structure figure of SCATS system.
Fig. 3 is the distributed level Four control structure figure of system.
Fig. 4 is the road network synoptic diagram.
Fig. 5 is the opertaing device schematic layout pattern.
Embodiment
Distribution-type four-stage structure traffic signal control system comprises central controlled stage, Region control level, key crossing controlled stage and crossing controlled stage or virtual crossing controlled stage; Wherein, central controlled stage is one-level control, and major equipment is central controller, is arranged on the urban traffic control center, is responsible for coordinating the control area controller; The Region control level is second level control, and major equipment is the Region control machine, is arranged on urban traffic control center or branch center, is responsible for coordinating control key crossing controller; The key crossing controlled stage is third level control, and major equipment is the key crossing controller, is arranged on the road junction of predetermined key, is responsible for coordinating crossing controller or virtual crossing controller; Crossing controlled stage or virtual crossing controlled stage are fourth stage control, and major equipment is the crossing controller, is arranged on road junction, be responsible for controlling the bright of crossing traffic signal lamp or going out, and the virtual crossing controller only exists on software logic, is non-existent physically.
Central authorities' controller connects nearly 48 Region control machines by optical fiber or cable communication channel, each Region control machine connects nearly 48 key crossing controllers by optical fiber or cable communication channel, each key crossing controller connects by the cable communication channel and is positioned at the key crossing periphery or is positioned at nearly 10 crossing controllers or virtual crossing controller on same the turnpike road, and each crossing controller or virtual crossing controller are responsible for lighting or are extinguished connected a plurality of traffic lights.
When the junction perimeter that will control when the key crossing controller and the spacing of key crossing are no more than 150 meters, do not establish the crossing controller at these crossings, the signal lamp that is installed in these crossings is directly connected to the key crossing controller by umbilical cable, adopts when junction spacing is shorter than 150 meters directly to connect the equilibrium consideration that is based on traffic signals trade-off effect and crossing equipment, communication channel cost of investment.When not establishing the crossing controller, the embedded software system of key crossing controller logically still sets up the virtual crossing controller for these crossings, and the key crossing controller does not exist physically by these but the signal lamp at these crossings is lighted or extinguished to the virtual crossing controller that exists on software logic.
The signal period that crossing controller or virtual crossing controller issue based on key crossing, the green light starting time difference, when obtaining the green light at this crossing by its built-in Control Software optimization than after, generate the light on and off time of belisha beacon, the light on and off of all signal lamps of control all directions, the vehicle of these crossing all directions of acquisition process arrives information simultaneously, forms elementary information uploading and gives the key crossing controller.
The elementary information that Cycle Length variation range that the key crossing controller issues based on the Region control machine and crossing controller or virtual crossing controller are uploaded, obtain the Cycle Length and the green light starting time difference at each crossing that this key crossing controller connected by its built-in Control Software optimization, the elementary information that each crossing controller or virtual crossing controller are uploaded carries out being uploaded to the Region control machine after aggregation process forms intermediate information simultaneously.
Region control machine and central controller are indoor equipmenies, the built-in Control Software of Region control machine, mainly finish and coordinate control and data processing function, the intermediate information that it is uploaded based on each key crossing controller that it connected to determine on a macro scale the variation range of the Cycle Length of each key crossing controller, and the intermediate information that each key crossing controller is uploaded is carried out aggregation process and formed high-level information simultaneously.
Central authorities' controller is a computing machine of carrying out management role, the database of its maintenance system, the high-level information that operation configuration, running status and each Region control machine of record and each Region control machine of storage administration and each key crossing controller uploaded is for traffic administration man analysis decision-making.
Embodiment is as described below: the control area of supposing this traffic signal control system is the road network of being made up of 6 signal junctions as shown in Figure 4, and junction spacing is as shown in table 1.
Preestablish crossing 2 and be key crossing, 2 are provided with the key crossing teleseme at the crossing, 1,3,4,6 are provided with intersection annunciator respectively at the crossing, because crossing 5 is 100 meters with the spacing of key crossing 2, be shorter than 150 meters, therefore 5 do not establish intersection annunciator at the crossing, and on the software logic of key crossing teleseme 2, virtual crossing teleseme 5 is set for crossing 5.
As shown in Figure 5, crossing controller 1,3,4,6 and virtual crossing teleseme 5, key crossing teleseme 2 are connected separately signal lamp group and wagon detector group by power cable, umbilical cable respectively, and crossing controller 1,3,4,6 directly is connected to key crossing teleseme 2 by telecommunication cable.The wagon detector group is used for detecting the traffic behavior at crossing, place in real time and being uploaded to the crossing controller that directly links to each other with it, at first the crossing controller 1,3,4,6 and virtual crossing teleseme 5, the built-in separately traffic signal optimization module of key crossing teleseme 2 is asked for the built-in traffic signal optimization Coordination module that makes the total vehicle delay in this crossing reach the signal period of minimum value and send key crossing teleseme 2 to respectively based on the traffic behavior at crossing, place and is determined the common signal cycle and the green light starting time difference at these crossings by it, thereafter the crossing controller 1,3,4,6 and virtual crossing controller 5, key crossing teleseme 2 is based on the common signal cycle, the green light starting time difference is obtained the green light time ratio at this crossing again by its built-in traffic signal optimization module optimization, thereby generate the light on and off time of the signal lamp group at crossing separately, reach the purpose of the light on and off of control crossing all signal lamps of all directions.
At traffic control center setting area controller, the Region control machine directly connects key crossing teleseme 2 by optical cable or telecommunication cable.2 each signal period of key crossing teleseme send primary information to the Region control machine, content comprises the traffic state information at crossing 1,2,3,4,5,6 in common signal cycle and this signal period, the Region control machine is determined alternative variation range of common signal cycle of key crossing controller 2 based on these information and the traffic state information that key crossing controller 2 sends is carried out Macro or mass analysis handle, and obtains arriving transport information such as flow, occupation rate such as the vehicle at crossing in each signal period 1,2,3,4,5,6.
In present case owing to only establish a Region control machine, and the Region control machine only is responsible for coordinating key crossing controller 2 of control, to computing ability and memory capacity require relatively low, so central controller can be set separately, the function of central authorities' controller can be finished in the lump by the Region control machine, the Region control machine also need be responsible for the database of maintenance system simultaneously like this, is responsible for the information such as operation configuration of record and storage administration Region control machine and key crossing controller 2.
Table 1 junction spacing table
| The crossing is right | 2-1 | 2-3 | 2-4 | 2-5 | 2-6 |
| Junction spacing (rice) | 200 | 350 | 300 (100+200) | 100 | 450 (100+350) |
List of references:
1, traffic administration and control (second edition), Yang Peikun, Wu Bing write, and People's Transportation Press publishes
2, road traffic control technology, Yin Hongbin, Xu Jianmin write, and publishing house of South China Science ﹠ Engineering University publishes.
Claims (7)
1, distribution-type four-stage structure traffic signal control system comprises central controlled stage, Region control level, key crossing controlled stage, it is characterized in that: the subordinate in the key crossing controlled stage sets up a crossing controlled stage or virtual crossing controlled stage; Wherein, central controlled stage is one-level control, and major equipment is central controller, is arranged on the urban traffic control center, is responsible for coordinating the control area controller; The Region control level is second level control, and major equipment is the Region control machine, is arranged on urban traffic control center or branch center, is responsible for coordinating control key crossing controller; The key crossing controlled stage is third level control, and major equipment is the key crossing controller, is arranged on the road junction of predetermined key, is responsible for coordinating crossing controller or virtual crossing controller; Crossing controlled stage or virtual crossing controlled stage are fourth stage control, the major equipment of crossing controlled stage is the crossing controller, be arranged on road junction, be responsible for controlling the bright of crossing traffic signal lamp or going out, and, the virtual crossing controller only exists on software logic, is non-existent physically.
2, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: central controller connects nearly 48 Region control machines by optical fiber or cable communication channel, each Region control machine connects nearly 48 key crossing controllers by optical fiber or cable communication channel, each key crossing controller connects by the cable communication channel and is positioned at the key crossing periphery or is positioned at nearly 10 crossing controllers or virtual crossing controller on same the turnpike road, and each crossing controller or virtual crossing controller are responsible for lighting or are extinguished connected a plurality of traffic lights.
3, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: when the junction perimeter that will control when the key crossing controller and the spacing of key crossing are no more than 100 meters, do not establish the crossing controller at these crossings, the signal lamp that is installed in these crossings is directly connected to the key crossing controller by umbilical cable, when not establishing the crossing controller, the embedded software system of key crossing controller logically still sets up the virtual crossing controller for these crossings, and the key crossing controller does not exist physically by these but the signal lamp at these crossings is lighted or extinguished to the virtual crossing controller that exists on software logic.
4, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: the signal period that crossing controller or virtual crossing controller issue based on key crossing, the green light starting time difference, when obtaining the green light at this crossing by its built-in Control Software optimization than after, generate the light on and off time of belisha beacon, the light on and off of all signal lamps of control all directions, the vehicle of these crossing all directions of acquisition process arrives information simultaneously, forms elementary information uploading and gives the key crossing controller.
5, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: the elementary information that Cycle Length variation range that the key crossing controller issues based on the Region control machine and crossing controller or virtual crossing controller are uploaded, obtain the Cycle Length and the green light starting time difference at each crossing that this key crossing controller connected by its built-in Control Software optimization, the elementary information that each crossing controller or virtual crossing controller are uploaded carries out being uploaded to the Region control machine after aggregation process forms intermediate information simultaneously.
6, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: Region control machine and central controller are indoor equipmenies, the built-in Control Software of Region control machine, mainly finish and coordinate control and data processing function, the intermediate information that it is uploaded based on each key crossing controller that it connected to determine on a macro scale the variation range of the Cycle Length of each key crossing controller, and the intermediate information that each key crossing controller is uploaded is carried out aggregation process and formed high-level information simultaneously.
7, distribution-type four-stage structure traffic signal control system according to claim 1, it is characterized in that: central controller is a computing machine of carrying out management role, the database of its maintenance system, the high-level information that operation configuration, running status and each Region control machine of record and each Region control machine of storage administration and each key crossing controller uploaded is for traffic administration man analysis decision-making.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101217841B (en) * | 2008-01-08 | 2011-06-22 | 天津市英克瑞电子技术有限公司 | A distributed scene light control system |
| CN102289942A (en) * | 2011-06-22 | 2011-12-21 | 鞍山市权晟电子电力有限公司 | Road traffic signal control device, running way, method and network |
| CN102346968B (en) * | 2011-09-29 | 2016-02-10 | 福建中庚视通信息科技有限公司 | Traffic signal control system |
| CN102956111B (en) * | 2012-11-05 | 2014-12-31 | 华南理工大学 | Method for coordinating and controlling urban arterial road group |
| CN102938210B (en) * | 2012-11-12 | 2015-02-25 | 浙江大学 | Method for controlling demands of traffics entering city regions by using signal lamps |
| CN103473946B (en) * | 2013-06-25 | 2017-05-10 | 中国计量学院 | Coordinate-based crossing signal lamp state instant prompting method and coordinate-based crossing signal lamp state instant prompting |
| US10127811B2 (en) | 2017-03-29 | 2018-11-13 | Here Global B.V. | Method, apparatus and computer program product for comprehensive management of signal phase and timing of traffic lights |
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