CN101763728A - Traffic jam rapid alarm system for road section without control of signal lamp and running method thereof - Google Patents
Traffic jam rapid alarm system for road section without control of signal lamp and running method thereof Download PDFInfo
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- CN101763728A CN101763728A CN200910188053A CN200910188053A CN101763728A CN 101763728 A CN101763728 A CN 101763728A CN 200910188053 A CN200910188053 A CN 200910188053A CN 200910188053 A CN200910188053 A CN 200910188053A CN 101763728 A CN101763728 A CN 101763728A
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Abstract
The invention relates to a traffic jam rapid alarm system for a road section without the control of a signal lamp and a running method thereof. The system comprises a vehicle detector and a detection signal analyzing and processing unit connected with the vehicle detector; wherein the vehicle detector is arranged in the road section in the detected traffic direction, the analyzing and processing unit is provided with a detection signal input interface for the vehicle detector and a traffic jam alarm signal output interface, an alarm threshold value Ta and an alarm clearing threshold value Tb are preset for the analyzing and processing unit, monitoring is executed from the time when the vehicle detector is occupied, and if the vehicle detector is continuously occupied for a period longer than or equal to Ta, a traffic jam alarm signal is launched and a photo of the site is taken; from the time when the vehicle continuously occupying the vehicle detector for a period longer than or equal to Ta leaves the vehicle detector, if the case that the vehicle detector is continuously occupied for a period longer than or equal to Ta does not occur again, the idle time of the vehicle detector is accumulated to the alarm clearing threshold value Tb, and then an alarm clearing signal is launched.
Description
Technical field
The present invention relates in a kind of urban traffic control traffic congestion rapid alarm system and operation method thereof be carried out in no signal lamp control highway section.
Background technology
Along with expanding economy, motor vehicle quantity increases severely, and urban highway traffic has been in state of saturation, particularly in rush hour morning and evening.When traffic accident such as traffic hazard, vehicle trouble, traffic offence driving behavior takes place, if can not get handling timely, will cause road traffic and stop up and spread to periphery rapidly, when serious even can cause the local traffic paralysis.
Traffic congestion at urban road, widespread use at present both at home and abroad all be that the detection information of the wagon detector by traffic signal control system is carried out analytical calculation, and can only calculate the road degree of crowding from the traffic overall trend, for best state---traffic congestion, then can not find fast, Rapid Alarm by the road traffic congestion that various accident caused.
At the crossing that signal lamp and wagon detector are arranged, even the highway section is like this, for the highway section that does not have signal lamp control such as city expressway, loop, viaduct etc., then is difficult to realize the Rapid Alarm of traffic congestion more.
Summary of the invention
Purpose of the present invention is intended to develop a kind of traffic congestion rapid alarm system that is free on outside the whistle control system, particularly is applicable to the highway section of no signal lamp control.This system can be packaged together wagon detector and detection signal analysis and processing unit and be arranged on the highway section of no signal lamp control, can analyze the vehicle pass-through situation in this track in real time, send warning message by the alerting signal output interface immediately after finding to block up.Traffic congestion rapid alarm system provided by the invention is achieved in that
Be applied to the traffic congestion rapid alarm system in no signal lamp control highway section, can report to the police according to detecting the situation whether wagon detector occur being taken continuously, it comprises a wagon detector and the detection signal analysis and processing unit on the highway section that is arranged on detected traffic direction.Default jam alarming threshold values Ta has also preset an alarm release threshold values Tb in the detection signal analysis and processing unit, has a wagon detector detection signal input interface and a traffic jam warning signal output interface simultaneously.The alert data of traffic jam warning signal output interface can be sent to control center by various communication modes (such as GPRS, telephone wire, broadband etc.), or is used to start other traffic control equipment or measure.
The traffic congestion routine analyzer that moves on the analysis and processing unit, system power on and initialization after bring into operation per second 4 times.Why per second moves 4 times, is in order to shorten real-time detection sampling interval, the raising accuracy of detection to the wagon detector seizure condition.
The ultimate principle of said system is: 1. work as the road traffic just often, the wagon detector that is arranged on the road should be taken by intermittence, and the fast more then vehicle of the speed of a motor vehicle is short more to the holding time of wagon detector, the slow more then holding time of the speed of a motor vehicle is long more.And, illustrate that promptly traffic abnormity has taken place at this moment in this highway section in case a certain the vehicle commander's time that has occurred originally should not occurring takies the situation of wagon detector continuously.According to this principle, at first in analysis and processing unit, preset a jam alarming threshold values Ta; The traffic congestion routine analyzer is monitored in real time to the situation that takies of wagon detector, taken the jam alarming threshold values Ta that meets or exceeds setting continuously in case wagon detector occurs, then sent the warning message that traffic congestion takes place in this highway section to the jam alarming signal output interface immediately.That is to say, set the purpose of jam alarming threshold values Ta, be to pick up counting, till this vehicle leaves wagon detector, stop timing, get congestion as long as timing length of appearance is promptly thought above the situation of Ta from there is vehicle to begin to take wagon detector at every turn.2. after this vehicle that takies wagon detector continuously sails out of wagon detector, the state of wagon detector becomes the free time from occupied, but should not remove crowded the warning this moment, with the non-steady state of avoiding reporting to the police, removing, report to the police again, remove again of frequently beating at once.Should be when leaving wagon detector from this vehicle that takies wagon detector continuously, after this in a certain setting-up time section, even wagon detector can be taken but not have vehicle to take wagon detector once more continuously again and when meeting or exceeding the situation of jam alarming threshold values Ta of setting by intermittent, the alarm release of just will crowding.According to this principle, at first in analysis and processing unit, preset an alarm release threshold values Tb; The traffic congestion routine analyzer is monitored in real time to the situation that takies of wagon detector, rise and pick up counting when the vehicle one that takies wagon detector continuously and meet or exceed the jam alarming threshold values Ta of setting leaves wagon detector, as long as do not occur the situation that vehicle takies wagon detector continuously and meets or exceeds the jam alarming threshold values Ta of setting again, with regard to the free time of accumulation calculating wagon detector, when accumulated value reaches the alarm release threshold values Tb of setting, remove and report to the police; And the situation that vehicle takies wagon detector continuously and meets or exceeds the jam alarming threshold values Ta of setting appears once more in a single day, it is output alarm signal, simultaneously with the accumulated value zero clearing, leave the new accumulation calculating once of wagon detector beginning from this vehicle next time.That is to say, leave wagon detector from a vehicle that takies wagon detector continuously and meet or exceed the jam alarming threshold values Ta of setting, begin the free time of wagon detector is carried out accumulation calculating, when reaching alarm release threshold values Tb, remove and report to the police, and the required time of this process is uncertain, the size of vehicle flowrate during depending on, just adds up what of vehicle gap.Wagon flow is more little, the gap is big more, and then this crowded releasing process is just short more; Wagon flow is intensive more, the gap is more little, and then this crowded releasing process is just long more.The free time of this wagon detector that adds up rather than add up except wagon detector is taken and is met or exceeded the jam alarming threshold values Ta of setting continuously the algorithm of free (being the time of wagon flow cruising), make crowded releasing to change, meet traffic stream characteristics, more accurate more according to stream characteristics.
Calculate with 3 meters of average vehicle commanders' wagon flow, the wagon flow on the no signal lamp control highway section, 60 kilometers of average speed per hours, 20 kilometers, 5 kilometers, 1 kilometer the time each car to the holding time of wagon detector be about 0.2 second respectively, 0.5 second, 2 seconds, 10 seconds.Therefore, reduce to how many times according to a certain road-section average speed of a motor vehicle and should regard as and taken place to block up, traffic engineer can be set corresponding jam alarming threshold values Ta for this wagon detector.Equally, alarm release threshold values Tb also can be set up on their own as the case may be by traffic engineer, generally be difficult for too small, in order to avoid cause thoroughly removing, when fleet loiters, reporting to the police, remove, report to the police again, the situation of frequently beating of releasing again blocking up as yet.Bigger alarm release threshold values Tb, the release confirmation process of blocking up that is equivalent to extend is though it is stronger to remove the long property confirmed of required time.
The operation method of traffic congestion Rapid Alarm provided by the present invention is:
(1) a default jam alarming threshold values Ta and alarm release threshold values Tb in analysis and processing unit,
(2) when system powers on, initialize routine starts, with reference to flow process shown in Fig. 1, with the wagon detector of traffic congestion routine analyzer take timer tu continuously, the idle totalizer te of wagon detector, current jam alarming state ca are initialized as 0, the traffic congestion that brings into operation then routine analyzer, per second 4 times
(3) with reference to flow process shown in Fig. 2, the traffic congestion routine analyzer that per second operation is 4 times, the detecting device seizure condition that at first checks vehicles then forwards (4) to if this moment, wagon detector was occupied, if wagon detector free time this moment then forward (5) to,
(4) wagon detector is taken timer tu continuously and add 1, judge that then whether tu is more than or equal to 4* queuing removing phase alarming threshold value Ta, be then to have represented to occur the situation that vehicle takies wagon detector continuously and meets or exceeds the jam alarming threshold values Ta of setting, current jam alarming state ca is changed to 1, the idle totalizer te of wagon detector is changed to 0, forward (6) then to
(5) wagon detector is taken timer tu continuously and be changed to 0, check then whether current jam alarming state ca equals 1, otherwise current no jam alarming and wagon detector free time are described, need not handle, directly forward (6) to; Be to illustrate that then current is to have occurred the wagon detector free time under the jam alarming state, idle totalizer te adds 1 with wagon detector, judge that then whether te is more than or equal to 4*Tb, otherwise reaching to block up as yet, the wagon detector free time that accumulative total this moment is described do not remove alarming threshold value Tb, directly forwarding (6) to, is the wagon detector free time that accumulative total this moment then is described to have reached the releasing alarming threshold value Tb that blocks up, and current jam alarming state ca is changed to 0, forward (6) then to
(6) send current jam alarming state ca to the traffic jam warning signal output interface, then
(7) withdraw from the operation of this traffic congestion routine analyzer.
Description of drawings
Fig. 1 is the initialize routine process flow diagram
Fig. 2 is a traffic congestion routine analyzer process flow diagram
Embodiment
Suppose that the somewhere is provided with wagon detector on certain viaduct, and default jam alarming threshold values Ta=8 second, alarm release threshold values Tb=30 second.
When system powers on, with the wagon detector of traffic congestion routine analyzer take timer tu continuously, the idle totalizer te of wagon detector, current jam alarming state ca are initialized as 0, the traffic congestion that brings into operation then analysis module, per second 4 times.
Suppose the current jam alarming (current jam alarming state ca=0) that do not have, certain car has taken wagon detector 3 seconds (wagon detector takies timer tu=4*3=12 continuously) continuously, and still taking this moment: at first the check vehicles wagon detector seizure condition of detecting device detection signal input interface of traffic congestion routine analyzer, occupied, then wagon detector is taken continuously timer tu and add 1 (tu=12+1=13), judge then tu (=13) whether more than or equal to 4*Ta (=4*8=32), not, then do not change ca, forward to the traffic jam warning signal output interface and send current jam alarming state ca (=0), withdraw from this operation of this traffic congestion routine analyzer then.
Suppose the current jam alarming (current jam alarming state ca=0) that do not have, certain car has taken wagon detector 7.75 seconds (wagon detector takies timer tu=4*7.75=31 continuously) continuously, and still taking this moment: at first the check vehicles wagon detector seizure condition of detecting device detection signal input interface of traffic congestion routine analyzer, occupied, then wagon detector is taken continuously timer tu and add 1 (tu=31+1=32), judge then tu (=32) whether more than or equal to 4*Ta (=4*8=32), be, then traffic congestion has taken place in explanation, ca is changed to 1, and with the idle totalizer te of wagon detector be changed to 0 also be about to before institute's wagon detector free time accumulated value clear 0 that may add up, send current jam alarming state ca (=1) to the traffic jam warning signal output interface then, withdraw from this operation of this traffic congestion routine analyzer then.
Suppose the current jam alarming (current jam alarming state ca=1) that has, wagon detector free time this moment, and added up 29.75 seconds wagon detector free time before this, it is the idle totalizer te=4*29.75=119 of wagon detector: at first the check vehicles wagon detector seizure condition of detecting device detection signal input interface of traffic congestion routine analyzer, idle, then at first wagon detector is taken continuously timer tu clear 0, judge then whether current jam alarming state ca equals 1, be, then the idle totalizer te of wagon detector is added 1 (te=119+1=120), judge then te (=120) whether more than or equal to 4*Tb (=4*30=120), be, then explanation is blocked up and is removed, ca is changed to 0, send current jam alarming state ca (=0) to the traffic jam warning signal output interface then, withdraw from this operation of this traffic congestion routine analyzer then.
Claims (5)
1. be applied to the traffic congestion rapid alarm system in no signal lamp control highway section, it is characterized in that:
(1) by wagon detector and be attached thereto the detection signal analysis and processing unit that connects and constitute,
(2) wagon detector is arranged on the detected traffic direction highway section,
(3) analysis and processing unit has a wagon detector detection signal input interface and a traffic jam warning signal output interface, default jam alarming threshold values Ta of analysis and processing unit and alarm release threshold values Tb,
A, from the occupied monitoring of wagon detector, if when 〉=Ta at interval in wagon detector taken continuously all the time, promptly send the traffic jam warning signal,
B, when leaving wagon detector, counts by the vehicle that takies wagon detector time period 〉=Ta continuously, if there is not wagon detector to be taken place again by duration of occupancy 〉=Ta situation, promptly add up free time of wagon detector to alarm release threshold values Tb, send the releasing alerting signal.
2. traffic congestion rapid alarm system according to claim 1 is characterized in that: traffic congestion routine analyzer per second operation four times.
3. traffic congestion rapid alarm system according to claim 1 and 2 is characterized in that: wagon detector is arranged on the track in detected traffic direction highway section.
4. traffic congestion rapid alarm system according to claim 1 and 2 is characterized in that: wagon detector and detection signal analysis and processing unit are packaged as a whole.
5. be applied to the traffic congestion rapid alarm system operation method in no signal lamp control highway section, it is characterized in that:
(1) a default jam alarming threshold values Ta and alarm release threshold values Tb,
(2) wagon detector with the traffic congestion routine analyzer takies timer tu continuously, the idle totalizer te of wagon detector, current jam alarming state ca are initialized as 0,
(3) the check vehicles wagon detector seizure condition of detecting device detection signal input interface then forwards (4) to if this moment, wagon detector was occupied, if wagon detector free time this moment then forward (5) to,
(4) wagon detector is taken timer tu continuously and add 1, judge that then whether tu is more than or equal to 4* queuing removing phase alarming threshold value Ta, be then to have represented to occur the situation that vehicle takies wagon detector continuously and meets or exceeds the jam alarming threshold values Ta of setting, current jam alarming state ca is changed to 1, the idle totalizer te of wagon detector is changed to 0, forward (6) then to
(5) wagon detector is taken timer tu continuously and be changed to 0, check then whether current jam alarming state Ca equals 1, otherwise directly forward (6) to, be then the idle totalizer te of wagon detector to be added 1, judge that then whether te is more than or equal to 4*Tb, otherwise directly forward (6) to, be then current jam alarming state ca to be changed to 0, forward (6) then to
(6) send current jam alarming state ca to the traffic jam warning signal output interface, then
(7) withdraw from this traffic congestion routine analyzer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910188053A CN101763728A (en) | 2009-10-22 | 2009-10-22 | Traffic jam rapid alarm system for road section without control of signal lamp and running method thereof |
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| CN200910188053A CN101763728A (en) | 2009-10-22 | 2009-10-22 | Traffic jam rapid alarm system for road section without control of signal lamp and running method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111161537A (en) * | 2019-12-25 | 2020-05-15 | 北京交通大学 | Road congestion situation prediction method considering congestion superposition effect |
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2009
- 2009-10-22 CN CN200910188053A patent/CN101763728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111161537A (en) * | 2019-12-25 | 2020-05-15 | 北京交通大学 | Road congestion situation prediction method considering congestion superposition effect |
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Open date: 20100630 |