CN101930672B - Traffic signal controlling machine for accurately alarming and photographing traffic jam and operation method thereof - Google Patents
Traffic signal controlling machine for accurately alarming and photographing traffic jam and operation method thereof Download PDFInfo
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- CN101930672B CN101930672B CN2009101880493A CN200910188049A CN101930672B CN 101930672 B CN101930672 B CN 101930672B CN 2009101880493 A CN2009101880493 A CN 2009101880493A CN 200910188049 A CN200910188049 A CN 200910188049A CN 101930672 B CN101930672 B CN 101930672B
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Abstract
The invention relates to a traffic signal controlling machine for accurately alarming and photographing the traffic jam and an operation method thereof. The traffic signal controlling machine comprises a vehicle detector, a detecting signal analyzing and processing unit, a signal lamp drive unit, image acquiring equipment, a communication unit and the like, wherein the detecting signal analyzing and processing unit is provided with a green light signal input interface, a detection signal input interface of the vehicle detector and a traffic jam alarm signal output interface; the green light signal input interface is used for releasing a detected traffic direction; and the detection signal analyzing and processing unit is preset with a queue clearing period alarm threshold Ta and a green light driving period alarm threshold Tb. By using the method, the occupied condition of the vehicle detector can be monitored to Ta since the green lamp is lightened, a traffic jam alarm signal is transmitted if the vehicle detector is always continuously occupied; and after the Ta, the occupied condition of the vehicle detector can be monitored to the extinguishment of the light, the traffic jam alarm signal is transmitted if the continuous occupation of the vehicle detector is not less than Tb. The image acquiring equipment is started to photograph the field once when the traffic jam alarm signal is transmitted.
Description
Technical field
The present invention relates to a kind of traffic lights controller and the operation method thereof that can report to the police, take pictures accurate traffic jam in the urban traffic control.
Background technology
Traffic lights play a part very important in the urban traffic management of changing in modern times.Traffic signal controlling machine at present both at home and abroad commonly used can be divided into the actuated controller that has wagon detector and not with the timing signal controlling machine of wagon detector.Actuated controller uses the wagon detector that is arranged on the urban road to detect the magnitude of traffic flow of road as the traffic detection means; Carry out after generating signal lamp timing scheme by the signal controlling computes then, or the detection data of wagon detector are sent to after the control center main frame by control center calculate and generate the signal controlling machine that sends the crossing after the signal lamp timing scheme again to and carry out.
The traffic signal control system of the control center of widespread use at present both at home and abroad generally all has through vehicle the situation of occupying of wagon detector is calculated the function of current road traffic degree of saturation, in view of the above and design generates the signal controlling preferred plan of following one-period or downstream road junction traffic flow.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 accidents such as occurrence of traffic accident, vehicle trouble, traffic offence driving behavior, 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.
Whistle control system can only calculate the road degree of crowding from the traffic overall trend in the prior art, for best state---the traffic congestion by the road traffic congestion that various accident caused, then can not find fast, quick accurate alarm.Normal traffic congestion can be foreseen, and also can only come to alleviate as possible through some conventional traffic engineering means (as using advanced traffic signals control); Traffic congestion by accident caused is then different; Since accident have multiple, spatial and temporal distributions is uncertain; And characteristics rapid to the current influence of normal traffic and that infringement property is big; Therefore require traffic-police must accomplish quick discovery, fast processing, thereby avoid forming large-area traffic paralysis.Realize this goal, just must accomplish to find fast the field point that road traffic blocks up takes place, have only quick discovery, could fast processing.
And present signal controlling machine does not possess the function of traffic congestion fast detecting and warning.For example domestic and international two big main traffic signal control systems; SCOOT whistle control system and SCAT whistle control system; The signal controlling machine of SCOOT whistle control system is that the state per second with wagon detector is uploaded to control center's main frame, receives and carries out by main frame and assign traffic signals timing scheme; And the whistle control system of SCAT whistle control system or other type; The information of perhaps gathering be not wagon detector seizure condition information but such as information such as traffic statistics; The information of perhaps being gathered is not to upload in real time but after at interval certain cycle (for example 5 minutes) packing data is uploaded, and therefore just can't realize the quick accurate alarm of traffic congestion yet.
And; Because the complicacy of road traffic; Any traffic congestion detecting alarm system all exists the mutual choice problem between sensitivity and the accuracy; Thereby high sensitivity requires the short detection affirmation cycle to cause accuracy rate to reduce, and then must need the long detection affirmation cycle to cause sensitivity to reduce thereby will improve accuracy.Which kind of traffic congestion fast detecting warning system that is to say, no matter can not reach 100% accuracy rate.Therefore, say, confirm to block up and check that the reason of blocking up is necessary through image capture device collection site image from the angle that traffic administration is actual.This affirmation work at present can only be to accomplish through the TV monitoring and controlling camera usually, quantity and limited coverage area, thus cause a lot of jam alarming information can't confirm and carry out cause investigation.
Summary of the invention
The object of the invention is intended to develop a kind of traffic lights controller that can report to the police, take pictures accurate traffic jam.This signal controlling machine is except the function that has actuated controller and have usually; Can also be according to being arranged on the information that the wagon detector on the road surface is gathered; Each green light in the phase vehicle pass-through situation to corresponding track analyze; Send warning message through the alerting signal output interface immediately after finding to crowd, and start image capture device collection site image simultaneously, be uploaded to control center simultaneously with warning message.It partly is made up of wagon detector and detection signal analysis and processing unit, timing computing unit, communication unit, signal lamp driver element, image capture device etc.
The traffic lights controller that can report to the police, take pictures accurate traffic jam provided by the invention is achieved in that
The traffic lights controller that can report to the police, take pictures accurate traffic jam; Its wagon detector partly is used to accomplish the collection to the road occupancy; The pairing detection signal analysis and processing unit of each wagon detector can be through to the analyzing and processing of wagon detector information and fast detecting traffic congestion and send warning message; Can the detection signal analysis and processing unit be arranged in the signal controlling machine; Also can detection signal analysis and processing unit and wagon detector are packaged together and be arranged on the road, it be more convenient to be arranged at teleseme control intraconnections usually; Its timing computing unit is used to accomplish calculate and generates the signal lamp timing scheme that signal lamp timing scheme or receiving system main frame assign and carry out; Its communication unit is used to the transmission and the reception of the information of accomplishing; Its signal lamp driver element is used for lighting or red light, amber light and the green light of black out signal lamp according to signal lamp timing scheme; Its image capture device is connected with analysis and processing unit; Analysis and processing unit detects and starts image capture device immediately after the traffic congestion and taken pictures in the scene, and the image scene that is collected can send back control center to confirm or to check the reason of blocking up and producing.Wherein the realization of functions such as vehicle detection, signal time distributing conception generation, communication is all prior art, no longer details here, and following emphasis is described in the warning of traffic congestion fast detecting, the photographic method in each green light phase.
The traffic lights controller that can report to the police, take pictures accurate traffic jam; Whether can open maximum queuing removing situation or maximum queuing after bright and remove the back wagon detector and occur again being taken continuously and report to the police and take pictures one of arbitrarily in the both of these case according to detecting green light, it comprises that one is arranged on the wagon detector on the signal lamp control crossroad traffic direction to be detected highway section, an image capture device and a traffic congestion routine analyzer that runs on the detection signal analysis and processing unit.Wagon detector can be arranged on apart from some meters of stop line (for example 0-100 rice) usually; Then preset a queuing removing phase alarming threshold value Ta apart from the distance of stop line in the detection signal analysis and processing unit according to wagon detector; Also preset the green light phase alarming threshold value Tb that goes; Signal lamp green modulating signal input interface and a wagon detector detection signal input interface of having the traffic direction to be detected of letting pass simultaneously, and a traffic jam warning signal output interface.The image scene that alert data and image capture device obtained of traffic jam warning signal output interface can be sent to control center through communication unit.
The traffic congestion routine analyzer that moves on the detection signal analysis and processing unit opens at the green light that is connected to signal lamp green modulating signal input interface and to bring into operation when bright, per second 4 times, and green light stops after finishing.Why per second moves 4 times, is in order to shorten real-time detection SI, the raising accuracy of detection to the wagon detector seizure condition.
The ultimate principle of said system is: the parking queuing of 1. supposing a certain flow direction of a certain signal lamp control crossroad queues to or surpasses wagon detector from stop line; So under the normal condition clearance green light open bright after; These queuing vehicles will start in order and move ahead; Also begin to start until the vehicle of on wagon detector, waiting for and move ahead, from the clearance green light open the bright vehicle of waiting for to wagon detector leave wagon detector required be called maximum queuing checkout time during this period of time.If a certain flow direction opens bright beginning from the clearance green light; To through till maximum queuing checkout time and suitable redundancy time; Wagon detector is taken all the time continuously; The queuing vehicle that promptly is parked on the wagon detector is not moving all the time, explains that this flow direction necessarily accident has taken place and caused traffic abnormity.According to this principle, at first in the detection signal analysis and processing unit, preset a queuing removing phase alarming threshold value Ta (length adds a suitable redundancy time for the maximum queuing checkout time of this wagon detector); The traffic congestion routine analyzer opens to light from green light and brings into operation; The situation that takies continuously to wagon detector is monitored; Light the queuing of setting and remove in this alarm detection time window that phase alarming threshold value Ta ends if open from green light; Wagon detector is taken all the time continuously, then sends the warning message that traffic congestion takes place this flow direction immediately.Whether that is to say, set the purpose of queuing removing phase alarming threshold value Ta, be to detect to have certain chassis to take wagon detector all the time opening from green light to light in this time period of ending to Ta, if promptly think the generation traffic congestion.2. after having passed through queuing removing phase alarming threshold value Ta; The queuing of red interval is all emptied, and vehicle ' the place ahead or green light, and this flow direction was in green light and went in the phase this moment; Also should move ahead in order even that is to say that vehicle is more; Wagon detector also should be taken by intermittence, and in case a certain the vehicle commander's time that in green light goes the phase, has occurred originally should not occurring takies the situation of wagon detector continuously, i.e. traffic abnormity has taken place at this moment in explanation.It is thus clear that only the running state of the vehicle according to the queuing removing phase blocks up to judge and report to the police to be not enough, can't accomplish accurate alarm.Therefore, according to this principle, preset green light phase alarming threshold value Tb that goes in the detection signal analysis and processing unit at first; The traffic congestion routine analyzer is in the time period after queuing removing phase alarming threshold value Ta; The situation that takies to wagon detector is monitored; Taken the green light that the meets or exceeds setting phase alarming threshold value Tb that goes continuously in case wagon detector occurs, also sent the warning message that traffic congestion takes place this flow direction immediately.That is to say; Set the go purpose of phase alarming threshold value Tb of green light; Be to open bright Ta at green light to go out to green light after second in this time period; There is vehicle to begin to take wagon detector at every turn and rises and pick up counting, till this vehicle leaves wagon detector, stop timing, promptly think and get congestion as long as situation that timing length surpasses Tb occurs.
Usually, motor vehicles parking when queuing, vehicle length add and front truck between spacing on average be about about 4 meters; The clearance green light open bright after, the checkout time of average every queuing vehicle is about 2 seconds, therefore being arranged on apart from 20 meters of stop line with wagon detector is example; Fleet's length was 5 chassis when the row of fleet was full; Required queuing checkout time is about 10 seconds, adds suitable redundancy time, and the removing phase alarming threshold value Ta that then lines up can be set at 15 seconds.Bright back wagon detector is still taken continuously and above 15 seconds, explain that then this highway section accident takes place causes traffic abnormity if the clearance green light of this direction opens, and should send warning message immediately.The green light phase alarming threshold value Tb that goes then should set according to the road conditions (whether slope etc. is for example arranged) and the vehicle condition (whether long vehicle or slow train etc. are for example arranged) of this flow direction.Therefore, the pairing queuing of each wagon detector remove phase alarming threshold value Ta and green light go phase alarming threshold value Tb all should be by traffic engineer according to factors such as wagon detector position, condition of road surface through calculating or measuring and concrete setting.
The operation method that accurate traffic jam provided by the present invention is reported to the police is:
(1) a preset queuing removing phase alarming threshold value Ta and the green light phase alarming threshold value Tb that goes in the detection signal analysis and processing unit,
(2) when detecting the signal lamp green light, signal lamp green modulating signal input interface changes Qi Liangshi into from extinguishing; Initialize routine starts; With reference to flow process shown in Fig. 1; With alarm detection time window timer tq, the wagon detector of traffic congestion routine analyzer take timer tc, current jam alarming state ca continuously, the sign ra that takes pictures is initialized as 0, the traffic congestion that brings into operation then analysis module, per second 4 times; Until signal lamp green modulating signal input interface detect the signal lamp green light from open bright change into extinguish till
(3) with reference to flow process shown in Fig. 2; The traffic congestion routine analyzer that the per second operation is 4 times; At first alarm detection time window timer tq is added 1, the wagon detector seizure condition of the detecting device detection signal input interface that checks vehicles then is if wagon detector occupiedly then took timer tc continuously with wagon detector and added 1 this moment; If wagon detector free time this moment then takies timer tc continuously with wagon detector and is changed to 0
(4) judge that alarm detection time window timer tq whether less than 4* queuing removing phase alarming threshold value Ta, is then to forward (8) to directly to withdraw from this traffic congestion routine analyzer; Otherwise judge whether alarm detection time window timer tq equals 4* queuing removing phase alarming threshold value Ta; Be then to explain to arrive queuing removing phase alarm detection decision-making constantly, forward (5) to, otherwise explanation has been spent the queuing removing phase and is in green light and goes the phase; Forward (6) to
(5) whether inspection tc equals tq; Be to explain that then wagon detector is taken continuously in the alarm detection time window; Current jam alarming state ca is changed to 1, otherwise is that explanation wagon detector in the alarm detection time window is not taken continuously, current jam alarming state ca is changed to 0; Then with tc be changed to 0 in order to follow-up green light go phase accumulative total wagon detector take continuously situation with and forward (7) to and send current jam alarming state ca to the traffic jam warning signal output interface
(6) judge tc whether more than or equal to the 4* green light phase alarming threshold value Tb that goes, do not taken continuously above the go situation of phase alarming threshold value of green light, forward (9) to and directly withdraw from this traffic congestion and analyze journey otherwise wagon detector appears at present in explanation as yet; Be to explain that then wagon detector in green light goes the phase, having occurred is taken above the go situation of phase alarming threshold value of green light continuously, is changed to 1 with current jam alarming state ca, then
(7) send current jam alarming state ca to the traffic jam warning signal output interface, then
(8) judge whether current jam alarming state ca be 1 and taken pictures the sign ra be 0; Otherwise directly forward (9) to; Be then to start image capture device to be taken pictures in the scene, and will take pictures the sign ra be changed to 1, thereby only to the first time jam alarming scene take pictures once;, same green light takes pictures repeatedly when in the cycle traffic congestion taking place avoiding, then
(9) 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 20 meters are provided with wagon detector behind the stop line of a certain flow direction of a certain signal lamp control crossroad, and preset the queuing removing phase alarming threshold value Ta=15 second, green light goes phase alarming threshold value Tb=9 second.
When detecting the signal lamp green light, signal lamp green modulating signal input interface changes Qi Liangshi into from extinguishing; With alarm detection time window timer tq, the wagon detector of traffic congestion routine analyzer take timer tc continuously, current jam alarming state ca is initialized as 0; The traffic congestion that brings into operation then routine analyzer, per second 4 times.
Suppose and open from green light that to light the 0th second to the 15th second wagon detector occupied all the time: this moment, the traffic congestion routine analyzer moved 4*15=60 time, and then tq equals 60, and tc also is 60; When judge alarm detection time window timer tq (=60) whether equal 4* queuing removing phase alarming threshold value Ta (=4*15=60) time; Be, explain to arrive the alarm detection decision-making constantly whether inspection tc (=60) equals tq (=60); Be; Explanation wagon detector in the alarm detection time window is taken continuously, and current jam alarming state ca is changed to 1, tc is changed to 0 takies situation continuously and use in order to the follow-up green light phase accumulative total wagon detector that goes; 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.The current jam alarming state ca (=1) that the traffic jam warning signal output interface sends can be sent to control center by the local communication circuit.
Suppose again to open to light the 0th second to the 15th second wagon detector accumulative total and have 6 SIs (1/4 second) unoccupied that have 54 SIs occupied: this moment, the traffic congestion routine analyzer moved 4*15=60 time, and then tq equals 60, and tc is 54 from green light; When judge alarm detection time window timer tq (=60) whether equal 4* queuing removing phase alarming threshold value Ta (=4*15=60) time; Be; Explain to arrive the alarm detection decision-making constantly, whether inspection tc (=54) equals tq (=60), not; Explanation wagon detector in the alarm detection time window is not taken continuously; Current jam alarming state ca is changed to 0, sends current jam alarming state ca (=0) to the traffic jam warning signal output interface then, withdraw from the operation of this traffic congestion routine analyzer then.
Suppose that more present green light opened bright 38 seconds; And wagon detector was taken continuously during these 9 seconds from the 30th second to the 38th second: this moment, the traffic congestion routine analyzer moved 4*38=152 time; Then tq equals 152, and wagon detector has been taken 9 seconds then tc=4*9=36 continuously; Tq greater than 4*Ta (=4*15=60); Explain that being in green light now went in the phase, judged that then tc (=36) whether more than or equal to 4*Tb=4*9=36, is; Explanation wagon detector occurred and has been taken the go situation of phase alarming threshold value Tb of green light that meets or exceeds continuously in green light goes the phase; Current jam alarming state ca is changed to 1, and sends current jam alarming state ca (=1), withdraw from the operation of this traffic congestion routine analyzer then to the traffic jam warning signal output interface.
Claims (6)
1. the traffic lights controller that can report to the police, take pictures accurate traffic jam is characterized in that:
(1) by wagon detector and be attached thereto detection signal analysis and processing unit, timing computing unit, communication unit, signal lamp driver element and an image capture device that is connected with analysis and processing unit of connecing and constitute,
(2) wagon detector is arranged on the traffic direction to be detected highway section of signal lamp control crossroad,
(3) the detection signal analysis and processing unit has signal lamp green modulating signal input interface, a wagon detector detection signal input interface and traffic jam warning signal output interface of the traffic direction to be detected of letting pass; Detection signal analysis and processing unit preset queuing removing phase alarming threshold value Ta and the green light phase alarming threshold value Tb that goes
A, open the occupied condition monitoring that lights wagon detector to Ta from green light, if during this section at interval in wagon detector taken continuously all the time, promptly send the traffic jam warning signal,
B, occupied condition monitoring to the green light to wagon detector after Ta go out, and at interval interior wagon detector occurs promptly being sent the traffic jam warning signal by duration of occupancy >=Tb during as if this section,
(4) analysis and processing unit detects and starts image capture device immediately after the traffic congestion and taken pictures in the scene.
2. the traffic lights controller that can report to the police, take pictures accurate traffic jam according to claim 1 is characterized in that: the traffic congestion routine analyzer per second operation on the detection signal analysis and processing unit four times.
3. the traffic lights controller that can report to the police, take pictures accurate traffic jam according to claim 1 and 2 is characterized in that: wagon detector is arranged on some meters behind the stop line.
4. the traffic lights controller that can report to the police, take pictures accurate traffic jam according to claim 1 and 2; It is characterized in that: can the detection signal analysis and processing unit be arranged in the signal controlling machine, also can detection signal analysis and processing unit and wagon detector be packaged together and be arranged on the road.
5. the operation method of the traffic lights controller that can report to the police, take pictures accurate traffic jam is characterized in that:
(1) a preset queuing removing phase alarming threshold value Ta and green light phase alarming threshold value Tb that goes,
(2) extinguish from green light and change Qi Liangshi into when signal lamp green modulating signal input interface detects signal lamp; Start initialize routine; With alarm detection time window timer tq, wagon detector take timer tc, current jam alarming state ca continuously, the sign ra that takes pictures all is initialized as 0; Begin the traffic congestion analysis then, only extinguish from opening bright becoming until detecting the signal lamp green light
(3) traffic congestion analysis: at first tq is added 1, the wagon detector seizure condition of the detecting device detection signal input interface that checks vehicles then then adds tc 1, then tc is changed to 0 as if at this moment unoccupied as if at this moment occupied,
(4) determine whether to arrive queuing removing phase alarm detection decision-making constantly: whether judging tq less than Ta, is then directly to withdraw from this routine analyzer, otherwise continuation judges whether tq equals Ta, be then to forward (5) to otherwise forward (6) to,
(5) whether inspection tc equals tq, is then ca to be changed to 1 otherwise ca is changed to 0, then tc is changed to 0 and forward (7) to,
(6) analyze and wagon detector whether to occur and taken continuously above the green light phase alarming threshold value situation of going: whether judging tc more than or equal to Tb, otherwise directly withdraw from this routine analyzer, is then ca to be changed to 1, then
(7) send current jam alarming state ca to the traffic jam warning signal output interface, then
(8) judge whether current jam alarming state ca be 1 and the sign ra that taken pictures be 0, otherwise directly forward (9) to, be then to start image capture device to be taken pictures in the scene, and the sign ra that will take pictures is changed to 1, then
(9) withdraw from this traffic congestion routine analyzer.
6. the operation method of traffic lights controller according to claim 5 is characterized in that:
(1) operation of traffic congestion routine analyzer per second is four times,
(2) determining whether to arrive queuing removing phase alarm detection decision-making constantly in the step, compare, judge with tq and 4*Ta,
(3) wagon detector whether occurs and taken continuously in the phase alarming threshold value situation step of going above green light analyzing, to compare, judge with tc and 4*Tb.
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| CN2009101880493A CN101930672B (en) | 2009-10-22 | 2009-10-22 | Traffic signal controlling machine for accurately alarming and photographing traffic jam and operation method thereof |
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| CN2009101880493A CN101930672B (en) | 2009-10-22 | 2009-10-22 | Traffic signal controlling machine for accurately alarming and photographing traffic jam and operation method thereof |
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| CN101930672B true CN101930672B (en) | 2012-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2513566A (en) * | 2013-04-29 | 2014-11-05 | Erh Holdings Ltd | Road traffic queue detection |
| CN105652217A (en) * | 2014-11-14 | 2016-06-08 | 上海伟世通汽车电子***有限公司 | Method and system for testing flickering of vehicle warning lamp |
| CN111275989B (en) * | 2019-12-31 | 2021-04-27 | 浙江浙大中控信息技术有限公司 | Single-point signal timing optimization method driven by congestion alarm |
| CN114299733B (en) * | 2021-09-14 | 2023-03-14 | 逸兴泰辰技术有限公司 | Crossing traffic light passing time adjusting system |
| CN116434544B (en) * | 2023-03-28 | 2024-04-19 | 合肥工业大学 | Flow direction conflict judging and timing optimizing method for four-phase signal intersection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928948A (en) * | 2006-07-18 | 2007-03-14 | 姜廷顺 | Urban road traffic congestion detecting alarm system and operation method thereof |
| CN201177875Y (en) * | 2007-10-23 | 2009-01-07 | 张孜纶 | Traffic light control apparatus capable of preventing crossroad junction |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928948A (en) * | 2006-07-18 | 2007-03-14 | 姜廷顺 | Urban road traffic congestion detecting alarm system and operation method thereof |
| CN201177875Y (en) * | 2007-10-23 | 2009-01-07 | 张孜纶 | Traffic light control apparatus capable of preventing crossroad junction |
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| Title |
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| JP特开平11-328574A 1999.11.30 |
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