CN102610098B - Method for setting road section traffic flow detector based on discrete model - Google Patents
Method for setting road section traffic flow detector based on discrete model Download PDFInfo
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- CN102610098B CN102610098B CN201210059784.6A CN201210059784A CN102610098B CN 102610098 B CN102610098 B CN 102610098B CN 201210059784 A CN201210059784 A CN 201210059784A CN 102610098 B CN102610098 B CN 102610098B
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Abstract
The invention provides a method for setting a road section traffic flow detector based on a discrete model in order to solve the problem that an existing traffic flow detector in manual layout cannot obtain needed traffic parameters by the aid of a small number of monitoring points. Road section condition observability discriminant is defined according to a macroscopic traffic flow discrete model, various traffic parameters including traffic flow, vehicle speed, traffic density, road occupancy rate and the like are detected in real time on a road by adjusting the setting scheme of the traffic flow detector, information is analyzed, judged and issued by a monitoring center, the basis of a control scheme is proposed, and integral running efficiency and management level are improved.
Description
Technical field
The present invention relates to road traffic current sensor method to set up, particularly a kind of road section traffic volume current sensor method to set up based on discrete model.
Background technology
Along with developing rapidly of highway transportation industry, highway administration department need to make regular check on road occupation situation, to damaged road surface is made to corresponding maintenance measure.The method of the artificial visual inspection of traditional use, paper notes record pavement behavior, is difficult to adapt to the requirement of high grade highway development; How in the situation that not affecting normal traffic transportation, to occurring on whole road section surface that damaged position makes detection and localization rapidly and accurately, become current urgent problem; In addition, the crossing of current many domestic city, Important Sections and expressway ramp mouth, responsive section (Frequent Accidents, bend many etc.) all set up fixed position checkout equipment.Can detect in real time traffic (as vehicle flowrate, the speed of a motor vehicle, density etc.) and accident generation information in fixed range; But, due to many-sided reason (being mainly funds reason), fixed test point can not be all set in each section; Like this, for the section that checkout equipment is not set, conventionally adopt following two kinds of modes to obtain relevant information: the one, to close on check point obtaining information, as basis, estimate this road section traffic volume situation, the 2nd, accident, congestion information circular telephone number are set, passive type is accepted the phone circular traffic that the human pilot of driving vehicle on this section is made, and namely in artificial mode, carrys out obtaining information; On the section that checkout equipment is not set, once there is sudden traffic hazard, in order to wait for that traffic police comes to process, need to retain the scene of the accident so that investigate and collect evidence and confirmation accident responsibility side, so just very easily cause blocking up of section.And traffic behavior perception is one of the basis of intelligent transportation system and gordian technique, accurately, obtain fast and reliably basic traffic data and comprehensive traffic information, for monitoring, management, maneuver traffic operation, improve transport services quality, guarantee traffic safety, alleviate traffic congestion significant.
Aspect transport information administration obtains, be mainly used in the management of the transportations such as toll on the road and bridge, long-distance transport or city bus both at home and abroad, can adopt administrative means acquisition unit separating vehicles and segment path information; But the most vehicles that travel in city, at present can be by the GPS information reporting of own vehicle to administrative authority, even in developed countries such as the U.S., because the human rights issues such as privacy also can not be executed in the recent period; On modern road, surveillance is a lot, but at least which monitor must detect in real time the various traffic parameters such as the magnitude of traffic flow, car speed, vehicle density and road occupancy on road, as Surveillance center, analyze, judge, release news and propose the basic foundation of control program, improve overall operation efficiency and management level; Traffic flow detecting device remains artificial layout at present.
Summary of the invention
In order to overcome the artificial layout of existing magnitude of traffic flow detecting device, can not obtain with a small amount of monitoring point the problem of required traffic parameter, the invention provides a kind of road section traffic volume current sensor method to set up based on discrete model, the method is according to Macro-traffic Flow discrete model definition section condition observability discriminant, by adjusting the plan of establishment of traffic flow detecting device, on road, detect in real time the magnitude of traffic flow, car speed, the various traffic parameters such as vehicle density and road occupancy, as Surveillance center, analyze, judgement, release news and propose the basic foundation of control program, improve overall operation efficiency and management level
The technical solution adopted for the present invention to solve the technical problems: a kind of road section traffic volume current sensor method to set up based on discrete model, is characterized in that comprising the following steps:
1, definition section condition observability discriminant is:
Wherein:
for observing matrix,
for the sampling period,
for specifying highway section label,
for the section sum of this appointment highway division,
be
individual section exists
the average density in moment,
be
individual section exists
the average velocity in moment,
for
moment enters from ring road entrance
the flow in individual section,
for
moment flows out the from ramp exit
the flow in individual section,
be
individual road section length,
for equivalent speed,
,
,
for free stream velocity,
be
there is the impact of information display board indication speed parity price speed in individual section,
for the maximum potential density in single track,
for weight coefficient,
be reflection special parameter and adjustable correction factor, make the more realistic traffic of whole model;
2, select observing matrix
, by twice observation, can express the estimated value of density, speed, if traffic flow detecting device is not installed in this section, the density in this section, speed must meet the substantially unimpeded condition of road for a long time:
Wherein:
,
for the given positive number that is less than 1, otherwise to install traffic flow detecting device additional.
The invention has the beneficial effects as follows: according to the criterion of system condition observability, traffic flow detecting device is set scientifically and rationally, on road, detect in real time the various traffic parameters such as the magnitude of traffic flow, car speed, vehicle density and road occupancy, for Surveillance center analyzes, judges, releases news and control program is selected to provide basic foundation.
Below in conjunction with embodiment, the present invention is elaborated.
Embodiment
, definition section condition observability discriminant is:
Wherein:
for the sampling period,
for specifying highway section label,
for the section sum of this appointment highway division,
be
individual section exists
the average density in moment,
be
individual section exists
the average velocity in moment,
for
moment enters from ring road entrance
the flow in individual section,
for
moment flows out the from ramp exit
the flow in individual section,
be
individual road section length,
for equivalent speed,
,
,
for free stream velocity,
be
there is the impact of information display board indication speed parity price speed in individual section,
for the maximum potential density in single track,
for weight coefficient,
be reflection special parameter and adjustable correction factor, make the more realistic traffic of whole model;
Wherein:
Speed and the density Estimation value that can observe by measuring speed this section, if traffic flow detecting device is not installed in this section, the density in this section, speed must meet the substantially unimpeded condition of road for a long time: for example:
Meet the substantially unimpeded condition of road:
Otherwise install traffic flow detecting device additional.
Claims (1)
1. the road section traffic volume current sensor method to set up based on discrete model, is characterized in that comprising the following steps:
1) definition section condition observability discriminant is:
Wherein:
for observing matrix,
for the sampling period,
for specifying highway section label,
for the section sum of this appointment highway division,
be
individual section exists
the average density in moment,
be
individual section exists
the average velocity in moment,
for
moment enters from ring road entrance
the flow in individual section,
for
moment flows out the from ramp exit
the flow in individual section,
be
individual road section length,
for equivalent speed,
,
,
for free stream velocity,
be
there is the impact of information display board indication speed parity price speed in individual section,
for the maximum potential density in single track,
for weight coefficient,
be reflection special parameter and adjustable correction factor, make the more realistic traffic of whole model;
2) select observing matrix
, by the estimated value of twice observation expression density, speed, if traffic flow detecting device is not installed in this section, the density in this section, speed must meet the substantially unimpeded condition of road for a long time:
Wherein:
,
for the given positive number that is less than 1, otherwise to install traffic flow detecting device additional;
Wherein:
By measuring speed, observe speed and the density Estimation value in this section, if traffic flow detecting device is not installed in this section, the density in this section, speed must meet the substantially unimpeded condition of road for a long time:
Meeting the substantially unimpeded condition of road is:
Otherwise install traffic flow detecting device additional.
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CN201210059784.6A CN102610098B (en) | 2012-03-09 | 2012-03-09 | Method for setting road section traffic flow detector based on discrete model |
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CN201210059784.6A CN102610098B (en) | 2012-03-09 | 2012-03-09 | Method for setting road section traffic flow detector based on discrete model |
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CN103198672A (en) * | 2013-03-27 | 2013-07-10 | 大连海事大学 | Method for laying urban road network traffic flow detectors |
CN103489316B (en) * | 2013-09-10 | 2016-05-18 | 同济大学 | A kind of network traffic flow detector distribution method based on road network topology relation |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19729914A1 (en) * | 1997-07-04 | 1999-01-07 | Mannesmann Ag | Process for the analysis of a traffic network, traffic analysis, traffic forecast as well as creation of a historical traffic database and traffic analysis and forecasting center |
CN101025861A (en) * | 2007-02-12 | 2007-08-29 | 吉林大学 | Detector layout method for urban traffic signal control system |
CN102169630A (en) * | 2011-03-31 | 2011-08-31 | 上海电科智能系统股份有限公司 | Quality control method of road continuous traffic flow data |
CN102306450A (en) * | 2011-08-30 | 2012-01-04 | 同济大学 | Layout method for traffic detectors of sparse road network |
CN102360526A (en) * | 2011-09-28 | 2012-02-22 | 东南大学 | Real-time monitoring method for road section state of high road |
-
2012
- 2012-03-09 CN CN201210059784.6A patent/CN102610098B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19729914A1 (en) * | 1997-07-04 | 1999-01-07 | Mannesmann Ag | Process for the analysis of a traffic network, traffic analysis, traffic forecast as well as creation of a historical traffic database and traffic analysis and forecasting center |
CN101025861A (en) * | 2007-02-12 | 2007-08-29 | 吉林大学 | Detector layout method for urban traffic signal control system |
CN102169630A (en) * | 2011-03-31 | 2011-08-31 | 上海电科智能系统股份有限公司 | Quality control method of road continuous traffic flow data |
CN102306450A (en) * | 2011-08-30 | 2012-01-04 | 同济大学 | Layout method for traffic detectors of sparse road network |
CN102360526A (en) * | 2011-09-28 | 2012-02-22 | 东南大学 | Real-time monitoring method for road section state of high road |
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