CN101727747A - Abnormal road jam alarming method based on flow detection - Google Patents

Abstract

The invention discloses an abnormal road jam (i.e. vehicle friction or accidents) alarming method based on flow detection, which utilizes a traffic flow sensor arranged on an intersection to detect the traffic flow of each traffic light alternation cycle to serve as the basis for judging whether vehicles can normally go through the section. When the traffic flow of the intersection has abrupt change, i.e. the intersection resource section is in abnormal jam, so that traffic flow can not normally advance. Parameters, such as section information, traffic flow and the like are sent to a control center to confirm the abnormal jam of the above section. After confirmation, an intelligent traffic control light module controls the timing of the traffic light of a relevant intersection to shunt vehicles on relevant roads. Meanwhile, the control center publishes the position information of the abnormal jam section, and a vehicle-mounted GPS navigator can quickly obtain the abnormal jam generating zone so as to avoid driving to the abnormal jam zone. The method has small data transmission quantity and can give an alarm for abnormal road jam within short time (alternation cycle of 3-4 traffic lights).

Description

Abnormal road jam alarming method based on flow detection

Technical field

Invention relates to the vehicle Flow Detection technology, wireless communication technology and traffic lights intelligent control technology, be triplicity be used for the improper alarm method that blocks up in main highway section, particularly a kind of abnormal road jam alarming method based on flow detection.

Background technology

Along with deepening continuously of economic globalization, the raising day by day of people's living standard, industrialization, Development of China's Urbanization are accelerated to impel auto age at hand, and the contradiction of contradiction, urban and rural transportation contradiction, traffic and the environment of economic demand contradictory, private car and public transport to traffic etc. are very outstanding.Particularly the level of urbanization improves rapidly, when the urban road service facility is greatly improved, the recoverable amount of vehicle increases severely, congested in traffic, increasing environmental pollution, traffic hazard takes place frequently, and city dweller's quality of life and satisfaction descend, and the sustainable development in city is restricted, traffic problems more and more become the hot issue of social concerns, press for the approach of systematically studying and proposing to solve.

Existing GPS navigation system can receive the data parameters of satellite transmission in 24 hours incessantly, and then obtained to receive the information such as position, direction, speed and time on ground.For the road real-time road condition information, but can't give traveler and point out timely and early warning.

Existing traffic information service platform as palm city science and technology, intercityly onlinely can understand road real-time traffic situation to a certain extent.On electronic chart road conditions are labeled as three grades, red expression is blocked up, and yellow expression has some setbacks, and green is then represented smooth and easy.Because existing electronic chart itself is colored, unclear on the contrary with red, yellow, green mark road conditions again.Even more serious is that data volume is big, can't upgrade in time, and lack specific aim.Whether general traveler unimpeded and be indifferent to for most roads, its care be whether to have improper blocking up in the trip way.Therefore the existing not current traveler of transport information based on the GPS navigation instrument need be understood, and because huge data volume makes the navigating instrument user be difficult to promptly recognize real-time road.In general, traveler is understood the traffic of this city traffic, and what be concerned about most in the trip is to avoid driving towards improper congestion regions or the highway section that grazing or accident have taken place.

Summary of the invention

Lack alarm method timely at burst traffic hazard highway section, the present invention utilizes Intelligent Measurement technology and wireless communication technology, realizes the burst traffic hazard is caused the processing and the warning in the improper highway section that blocks up.

The present invention adopts following technical scheme for achieving the above object:

The present invention is based on the abnormal road jam alarming method of flow detection, it is characterized in that comprising the steps:

The first step: go out the vehicle flowrate a of the traffic lights in current highway section in the cycle by the vehicle flowrate sensor, current vehicle flowrate a is deposited in the storer;

Second step: the described current vehicle flowrate a of the first step and the vehicle flowrate b in a last traffic lights cycle are compared:

When m 〉=2 and $\frac{a}{b}\≤(m-1)\×25\%$ The time; Or when m=1 and $\frac{a}{b}\≤25\%$ The time, then current road section information and information of vehicle flowrate are sent to control center by wireless communication module, wherein m is a current highway section number of track-lines;

The 3rd step: after control center receives the data that described wireless communication module of second step sends, confirm whether improper blocking up of described highway section:

After the improper affirmation of blocking up in described highway section, then, be presented on the car borne GPS navigation instrument with the form of glimmering, and be aided with audio alert the geography information issue of this congestion points, sketch improper situation of blocking up, prompting is about to passing vehicle and in time detours.In this simultaneously, regulate the traffic lights timing at relevant crossing, slow down the relevant road segments vehicle flowrate improper aggravation of blocking up by the intelligent transportation lamp control module;

When described highway section was normally current, control center was failure to actuate.

The sensor vehicle flowrate that the present invention utilizes the intersection to be provided with is as the foundation of judging whether this highway section blocks up.When this intersection vehicle flux produces sudden change, represent that promptly improper blocking up may appear in this highway section, source, crossing, such as having produced vehicle grazing, traffic accident etc., caused wagon flow normally not advance thus.By wireless communication module current road section information and information of vehicle flowrate are sent to control center.After control center receives above-mentioned information, improper the blocking up in described highway section confirmed.After the improper affirmation of blocking up in described highway section, then, be presented on the car borne GPS navigation instrument with the form of glimmering, and be aided with audio alert the geography information issue of this congestion points, sketch improper situation of blocking up, prompting is about to passing vehicle and in time detours.In this simultaneously, allocate the traffic lights timing at relevant crossing, slow down the relevant road segments vehicle flowrate improper aggravation of blocking up by the intelligent transportation lamp control module.

Description of drawings

Fig. 1 is the block diagram of system.

Fig. 2 is system works flow process figure.

Embodiment

Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:

The described composition that is based on the abnormal road jam alarming device of flow detection of Fig. 1.The vehicle Flow Detection module is used to detect the vehicle flowrate in each traffic lights alternate cycle, mainly is made up of three parts such as vehicle flowrate sensor, microcontroller, input and output.This module is connected with the intelligent transportation lamp control module is unidirectional, is connected with wireless communication module is two-way, and wireless communication module is connected with control center is two-way, and control center is connected with the GPS navigation instrument is unidirectional.When the detected vehicle flowrate and the vehicle flowrate generation significant change in current cycle of last traffic lights, this road section information and current information of vehicle flowrate are sent to control center by wireless communication module.Control center with the mode of place of alarm with flicker, is sent to the car borne GPS navigation instrument through after confirming, reminds traveler to detour as far as possible.By the intelligent transportation lamp control module, regulate the traffic lights timing at relevant crossing simultaneously, slow down of the influence of relevant road segments vehicle flowrate the warning highway section.

Fig. 2 has then provided concrete implementation process, at first be that flow detection module inspection vehicle flow information is also stored, the vehicle flowrate in current traffic lights cycle and the vehicle flowrate of a last current cycle car are compared, according to vehicle flowrate whether obvious minimizing taking place, and then judges whether this highway section improper blocking up taken place.If do not take place obviously to reduce, just continue to detect.If current vehicle flowrate takes place obviously to reduce, then this road section information and current vehicle flowrate are sent to control center by wireless communication module.Improper blocking up through after control center's affirmation then with the geography information issue of this congestion points, is presented on the car borne GPS navigation instrument with the form of glimmering, and is aided with audio alert, sketches improper present case of blocking up, and prompting is about to passing vehicle and in time detours.In order to slow down the relevant road segments vehicle flowrate, utilize the intelligent transportation lamp control module to allocate the traffic lights timing at relevant crossing to improper aggravation of blocking up.

Claims (1)

1. the abnormal road jam alarming method based on flow detection is characterized in that comprising the steps:

The first step: by the vehicle flowrate sensor that is arranged on crossing intersection part, detect the interior vehicle flowrate a of traffic lights cycle in current highway section, current vehicle flowrate a is deposited in the storer;

Second step: the described current vehicle flowrate a of the first step and the vehicle flowrate b in a last traffic lights cycle are compared:

When m 〉=2 and $\frac{a}{b}\≤(m-1)\×25\%$ The time; Or when m=1 and $\frac{a}{b}\≤25\%$ The time, then current road section information and information of vehicle flowrate are sent to control center by wireless communication module, wherein m is a current highway section number of track-lines;

The 3rd step: after control center receives the data that described wireless communication module of second step sends, confirm whether improper blocking up of described highway section:

After the improper affirmation of blocking up in described highway section, then, be presented on the car borne GPS navigation instrument with the form of glimmering, and be aided with audio alert the geography information issue of this congestion points, sketch improper situation of blocking up, prompting is about to passing vehicle and in time detours.In this simultaneously, allocate the traffic lights timing at relevant crossing, slow down the relevant road segments vehicle flowrate improper aggravation of blocking up by the intelligent transportation lamp control module;

When described highway section was normally current, control center was failure to actuate.

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