CN104732776A

CN104732776A - Urban intelligent traffic signal control system

Info

Publication number: CN104732776A
Application number: CN201310716779.2A
Authority: CN
Inventors: 王飞稳
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2015-06-24

Abstract

The invention relates to an urban intelligent traffic signal control system. The system takes a signal controller as a signal control module which is centralized in a system control center, intersection signal lamps are directly controlled by the system control center through a wire mode or a wireless mode, and a traditional mode of location installation of the signal controller is changed, so that the system cost is greatly reduced, the high efficiency of maintenance is improved, the urban environment is beautified, and the social benefit and the economic benefit are well achieved. Please refer to Figure 1 for the center control system.

Description

A kind of city intelligent traffic signal control system

Technical field

The invention belongs to intelligent transportation field, relate to city intelligent traffic signal control system.

Background technology

City intelligent traffic signal control system progressively realizes networking control mode, namely to arrange an intelligent transportation command centre (abbreviation central control system) interconnected by the controller (abbreviation teleseme) of a wired or wireless networking mode and urban road crossing platform signal lamp in city, relevant crossing traffic information can be obtained by teleseme central control system, simultaneously also can by central control system instruction issuing to teleseme, control belisha beacon by teleseme, thus realize the orderly control of traffic.

Summary of the invention

For current city intelligent traffic signal control system, present invention achieves a kind of new city intelligent traffic signal control system, this system using each for city intersection annunciator as a signal control module, all be integrated into central control system, corresponding one group, the crossing signal lamp of each signal control module, connected by wired or wireless mode, real-time detection and control signal lamp.Realize urban transportation to pass through in order and efficiently.

This invention greatly reduces cost and the city occupation of land of original system, and maintenance and repair is efficiently convenient, has beautified city.

Accompanying drawing explanation

Fig. 1 is a kind of city intelligent traffic signal control system central control system of the present invention block schematic illustration;

Fig. 2 is a kind of city intelligent traffic signal control system belisha beacon of the present invention group safeguards system block schematic illustration;

embodiment

Teleseme corresponding for urban road crossing signal lamp is all integrated into down town control system as signal control module, center software and each intersection signal control module interconnected, obtain and detect crossing traffic information, issue signal instruction.Signal control module is connected by wired or wireless mode with corresponding belisha beacon group, issues signal instruction and detection signal lamp group information.Realize the control of crossing traffic signal, see Fig. 1.

Central control system forms by center-controlling software with corresponding to the signal control module at each crossing, center-controlling software realizes integrated management and the control of whole city road network, and it comprises a series of functions such as GIS map, crossing registration, arterial control, Region control, special duty's circuit, traffic flow monitoring, traffic flow data analysis, crossing condition monitoring, failure monitoring; A signal control module is responsible for the control of an all signal lamp group in crossing, is connected with belisha beacon group by network, and to its sending controling instruction, the detected state of Received signal strength lamp group and the access connection traffic flow of collection detect data.

Each crossing is made up of some signal lamp groups, the signal lamp component in general each direction joins a fixing network address, unified management and distribution is carried out by center-controlling software, carry out network address setting according to the lamp group of address to each direction, each crossing of distributing during installation, ensure the uniqueness of its address.Center-controlling software provides a signal control module for each crossing, and this control module comprises control algolithm unit, communication unit, breakdown judge and processing unit, detection data analysis and process unit etc.

The control algolithm unit of signal control module is responsible for selecting suitable algorithm to calculate the traffic light system time of each lamp group in crossing according to configuration and actual traffic stream situation, it contains traditional control model such as multi-period timing, induction, line coordination, Scheme Choice, also contains in center set simultaneously and coordinate and online adaptive control model, adaptive control scheme can take again the optimized algorithm such as fuzzy logic, neural network, self-adaptation dynamic programming, give full play to the advantage of various algorithm, reach better control effects.

The communication unit of signal control module is responsible for communicating with the signal lamp group of controlled crossing all directions, the network address of signal lamp group is managed by center-controlling software and is configured to each signal control module, signal control module by the network address with control crossing all directions signal lamp group establish a communications link.When the state of signal lamp group needs to change, signal control module sends lamp status data according to the communication protocol pre-established to signal lamp group, and signal lamp group is converted into actual light color output display after receiving these data.Signal lamp group, according to the acquisition interval time of setting, such as 5 minutes, sends the Traffic flow detecting data collected to signal control module.Signal control module sends signal lamp STATUS ENQUIRY message every 500ms to signal lamp group, signal lamp group returns current signal lamp detected state to it, signal control module judges the signal lamp ruuning situation at crossing according to the signal lamp detected state that each signal lamp group is replied, when occur red green with catastrophic failures such as bright, green conflict, the extinguishings of lamp group time, signal control module can send degradation instruction to each signal lamp group, notifies that it enters Huang Shanhuo and to turn off the light degraded running pattern.Every 500 milliseconds of signal lamp group sends heartbeat packet to signal control module, judge that whether the communication between signal control module is normal by the reply of heartbeat packet, do not receive heartbeat packet to reply when 3 seconds, signal lamp group is thought and to be disconnected with the communication of signal control module, certainly can be advanced into yellow sudden strain of a muscle state; Synchronous signal control module can receive the heartbeat packet of each signal lamp group in crossing and reply, if within 3 seconds, do not receive the heartbeat packet of any one or more signal lamp groups, signal control module is thought and to be disconnected with these signal lamp group communications, and send yellow sudden strain of a muscle steering order to other signal lamp group, make when there is communication failure, the signal lamp group of crossing all directions enters yellow sudden strain of a muscle state simultaneously, realizes degraded running during communication failure.Once communication recovery is normal, each signal lamp group Received signal strength control module sends again steering order can enter normal light color output display.

The breakdown judge of signal control module and processing unit are except above-mentioned communication failure judges, also comprise signal lamp condition adjudgement, by the detected state of every 500 milliseconds of each signal lamp groups of inquiry, and the passage configuration, conflict rule, detection configuration etc. that preset judge the state of signal lamp, red green with catastrophic failures such as bright, green conflict, the extinguishings of lamp group once occur, signal control module can send degradation instruction to each signal lamp group, notifies that it enters Huang Shanhuo and to turn off the light degraded running pattern.

The detection data analysis and process unit of signal control module carries out statistical study to the Traffic flow detecting data that signal lamp group is uploaded according to acquisition interval, mainly contain the data such as the magnitude of traffic flow, time occupancy, space occupancy and queue length, then by the form write central database preset.

For breaking down in transmittance process between anti-stop signal control module and signal lamp group, wired and radio communication is increased between local belisha beacon group, composition belisha beacon group safeguards system, when breaking down in transmittance process between signaling control unit and signal lamp group, safeguards system is judged and starts to ensure operating scheme in time, to guarantee crossing traffic normal pass, between signal control module and signal lamp group after Failure elimination, the automatic switchback of safeguards system.See Fig. 2.

Because the signal lamp group at crossing each in whistle control system is controlled in real time by signal control module corresponding in central control system, depend on the reliability of communication network, once communication network breaks down and interrupts, the normal display of belisha beacon must be ensured, so set up belisha beacon group safeguards system in this locality.

Each belisha beacon group, except except the signal control module at center is set up and communicated, is also communicated by wired or wireless network between them, wiredly can adopt Ethernet or RS485 mode, wirelessly can adopt ZigBee mode.Once the signal lamp group at crossing and the communication broke down of center signal control module, then start safeguards system, the king light group preset in each signal lamp group starts to control the signal lamp group at this crossing temporarily, the traffic signal timing scheme of complete set is stored in this signal lamp group, this lamp group sends light color data according to communication protocol to other lamp group, and the light color controlling self exports simultaneously, the signal lamp of crossing all directions is run according to the signal timing dial prestored and phase place.

After the communication recovery of the signal lamp group at crossing and center signal control module is normal, king light group stops sending light color data to other lamp group, and each lamp group starts the light color data of receiving center signal control module and output display.Do not undergo mutation in order to ensure light color state, can continue after communication recovery to have run current period, when next cycle starts, continued to control by center signal control module.

Claims

1. a city intelligent traffic signal control system, the invention belongs to intelligent transportation field, relates to city intelligent traffic signal control system.。

2. a kind of city intelligent traffic signal control system according to claim 1, is characterized in that teleseme all concentrates in central control system as the signal control module of central control system.

3. between system belisha beacon group, there is safeguards system according to claim 2.