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CN101635095B - Method for real-time and self-adaptive display and control during traffic signal countdown - Google Patents

Method for real-time and self-adaptive display and control during traffic signal countdown Download PDF

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CN101635095B
CN101635095B CN2009100659484A CN200910065948A CN101635095B CN 101635095 B CN101635095 B CN 101635095B CN 2009100659484 A CN2009100659484 A CN 2009100659484A CN 200910065948 A CN200910065948 A CN 200910065948A CN 101635095 B CN101635095 B CN 101635095B
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CN101635095A (en
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卢海
张同太
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Abstract

The invention relates to a method for real-time and self-adaptive display and control during traffic signal countdown. On a basis of real-time and self-adaptive traffic signal control, for purpose of adopting a traffic signal machine to control signal lights and a signal countdown timer at each road intersection, each green light phase displayed in the real time is divided into a green light adjustable phase and an auxiliary stationary green light phase, and each red light phase displayed in the real time is divided into a red light adjustable phase and an auxiliary stationary red light phase. The method can track the phase duration change of light colors within an operation period, has corresponding adjusting functions and can properly display the rest time for traffic signal waiting and for vehicle pass. The method can carry out upgrading and alteration on a basis of existing traffic signal countdown timers and satisfy the requirement for the use of a real-time and self-adaptive traffic signal control system under a real-time and self-adaptive traffic signal control mode and a fixed time distribution control mode after system degrading.

Description

Method for real-time and self-adaptive display and control during traffic signal countdown
One, technical field: the real-time display control method that the present invention relates to a kind of traffic signals count-down device, can under advanced person's real-time adaptive traffic signals control mode, the scientific and rational demonstration traffic signals of traffic signals count-down device be waited for and length excess time of passing through.
Two, background technology: at present, domestic city traffic signals count-down device is mainly used in decides timing traffic signals control mode.Because the line portals traffick is not how much decide the timing traffic signaling equipment, the signal light color duration of exporting in a stage is changeless, thereby count-down device can cooperate the omnidistance tracing display synchronously of corresponding signal lamp, for arriving the vehicle at crossing, the pedestrian provide concrete definite wait and current excess time length, be well received.
Along with the continuous increase of urban motor vehicle, traffic jam issue is serious day by day, and at the shortcoming of deciding timing traffic control mode timing underaction, induction control mode and adaptive control mode begin to come into the market.Wherein adaptive control mode is than the more senior a kind of control mode of induction control.Induction control is often for single intersection, and its principal character is: the green time of certain phase place changes according to the variation of vehicle flowrate.And adaptive control is regarded urban traffic network as a uncertain system usually, system can be by the state of this uncertain system of continuous coverage, as features such as vehicle flowrate, stop frequency, delay time at stop, queue lengths, understand and grasp object gradually, change the adjustable parameter or the replacing timing scheme of system on this basis or produce a new timing scheme, thereby guarantee no matter how environment changes, all can make the control effect reach optimum or suboptimum.
Self-adaptation control method generally includes two classes: the one, and Scheme Choice formula system, according to different traffic flows, the various timing schemes of configured in advance, be stored in the central computer, the traffic data of gathering is in real time pressed during operation by system, chooses the most suitable timing scheme, implements signal controlling.Because the timing scheme chosen is clear and definite and can predict, so the supporting with it use of communication-type count-down device can be selected by Scheme Choice formula system.
The 2nd, online production, it is the real-time adaptive control mode, promptly pass through wagon detector, gather in real time traffic data, line solver optimum signal timing scheme, and carry out optimizing and revising of suitable amplitude according to current demand signal timing scheme, calculate and generate the new signal time distributing conception in next cycle crossing in real time, but this new signal timing scheme only is the prediction scheme of using in the following cycle, when the phase carries out in next week, still can change in real time according to the real-time traffic rheologyization.Under real-time adaptive control system, several cycles of every mistake are just once adjusted the Cycle Length at all crossings in the zone according to the result of calculation of system, and promptly the cycle is adjusted; Each cycle is all distributed adjustment, i.e. split adjustment according to the result of calculation of system to the green time of the different lamp groups in each crossing; Each cycle is all adjusted i.e. phase differential adjustment according to the result of calculation of system to the start time in cycle at each crossing.Cycle, split and phase differential adjustment interact and restrict, concentrated reflection is in the adjustment of split, concentrated reflection can't be known the real clearance time in all green lights and the continuous adjustment of red light phase clearance time in the clearance cycle of each crossing traffic signal when causing green light or red light to open.
Under real-time adaptive traffic signals control mode, its foundation that adjust to change is from two aspects: the one, and change according to the variation of vehicle flowrate: the direction traffick in crossing is more for a long time, the clearance green time can strengthen automatically, a direction traffick more after a little while, the clearance green time can automatically shorten; The 2nd, the adjustment of cycle and phase differential also can cause the variation of light color stage duration, this mainly is because the control of real-time adaptive traffic signals is generally Region control, the Region control overall efficiency is greater than single crossing, and this also is the main part of adaptive control mode than induction control mode advanced person.
In view of the foregoing, decide timing traffic signals count-down device and do not possess self-adaptation adjustment function, can't follow the tracks of the real-time adaptive traffic signal control system just carrying out the variation of time in light color stage.Therefore, the timing count-down device of deciding originally all is deactivated after urban traffic control system upgrades to real-time adaptive traffic signals control technology.Generally adopt the method for signal lamp " 3 seconds+amber light of blue flash 3 seconds " that the conversion of traffic signals light color is pointed out.
Be to solve the supporting demonstration problem of count-down device and real-time adaptive traffic signal control system, domesticly some have also occurred and be correlated with approachingly, have the method and the technology of own characteristic.Chinese invention patent ZL 200610039226.8 (Granted publication CN 100385474C) has proposed the control method that a kind of traffic signals countdown shows, set in advance a time period in the later stage of traffic signaling equipment phase time, when phase time is carried out starting point to this time period, traffic signaling equipment begins to calculate vehicle flow information, if the wagon flow of having detected, then traffic signaling equipment increases a period of time in the above-mentioned time period, if the wagon flow of not detecting, then traffic signaling equipment reduces a period of time in the above-mentioned time period, then, traffic signaling equipment changes the frequency of carrying video data information to count-down screen by calculating, thereby change the length that countdown screen per second shows the time, it is consistent with the signal lamp demonstration time to have realized that count-down device shows.Be characterized in: 1, set in advance a time period in the later stage of traffic signaling equipment phase time, time period length is variable; 2, the frequency of data presentation is variable.Its weak point is: 1, under the display digit same case, be uncertain the actual time of expressing to the passenger; 2, this programme changes powerless for count-down device under the induction control mode shows the method for control at the light color stage duration that the cycle under the real-time adaptive traffic signals control mode is adjusted and the phase differential adjustment causes.Chinese invention patent ZL 200710020780.6 (Granted publication CN 100504956C) has proposed the control method that a kind of traffic lights countdown shows, utilize wagon detector to detect vehicle flow, after teleseme stops vehicle Flow Detection, determine passenger or taboo passerby's terminating point, default a period of time is the countdown time before terminating point, uses the composite signal lamp that is combined into one with amber light to come video data.Its weak point is: count-down device only can show the part clearance time in later stage in a kind of light color stage, can not display lamp color range section from being opened to the overall process of end.
Existing traffic signal control system countdown display packing, all there are limitation and defective in tracking rationally and expression real-time adaptive traffic signal control system on the feature to signal lamp control, do not possess the self-adaptation regulatory function, up till now, also do not have the supporting method of a kind of count-down device and real-time adaptive traffic signal control system generally to be admitted, extensively adopt.
Three, summary of the invention:
The present invention is directed to the prior art deficiency, a kind of method for real-time and self-adaptive display and control during traffic signal countdown is proposed, can make the count-down device science, reasonably show that traffic signals are waited for and length excess time of passing through, can follow the tracks of cycle of operation light color operation duration and change, and possess corresponding regulatory function.
The technical solution adopted in the present invention:
A kind of method for real-time and self-adaptive display and control during traffic signal countdown, on real-time adaptive traffic signal control system basis, by traffic signaling equipment the demonstration of signal lamp and count-down device is controlled, one is divided into a green light adjustable section (Ga) and a complementary fixedly green light section (Gf) with each green light stage (G) that shows in real time; Each red light phase (R) that shows in real time is divided into a red light adjustable section (Ra) and a complementary fixedly red light section (Rf);
Its two, to green light stage or the red light phase carried out, count-down device at first shows the predicted value of light color clearance duration, and the demonstration of successively decreasing on this basis;
They are three years old, count-down device is in procedure for displaying, according to the signal (Gs or Rs) that the traffic signaling equipment that receives sends video data is regulated: (1) if current light color clearance duration greater than predicted value, then count-down device show fixedly green light section (Gf) or fixedly the preceding data of will suspending of red light section (Rf) successively decrease, wait for a period of time and lack duration to supply, show fixedly green light section (Gf) or fixing red light section (Rf) duration and be decremented to zero then, (2) if current light color clearance duration equals predicted value, then count-down device directly shows the predicted value duration and is decremented to zero, (3) if current light color clearance duration less than predicted value, count-down device then show fixedly green light section (Gf) or fixedly red light section (Rf) deduct the unnecessary duration of predicted value before, show complementary fixedly green light section (Gf) or fixing red light section (Rf) duration and be decremented to zero then.
Described method for real-time and self-adaptive display and control during traffic signal countdown, count-down device divides three phases to finish to the green light carried out or the procedure for displaying of red light phase:
Phase one at first shows the predicted value duration when light color is opened, and successively decreases on this basis;
Subordinate phase is regulated video data according to receiving the switching signal that traffic signaling equipment sends;
Phase III is to enter complementary fixedly green light section (Gf) or fixedly red light section (Rf) demonstration.
Described method for real-time and self-adaptive display and control during traffic signal countdown, wherein complementary fixedly green light section (Gf) and fixedly red light section (Rf) be a changeless normal value, its numerical value is according to the crossing traffic requirements set.
Described method for real-time and self-adaptive display and control during traffic signal countdown, the predicted value that this shows light color clearance duration is the mean value of nearly 2~5 this light color stage in cycle durations.
Described method for real-time and self-adaptive display and control during traffic signal countdown, this shows the predicted value of light color clearance duration, is actual green light stage (G) or red light phase (R) duration of letting pass of last one-period.
Beneficial effect of the present invention:
1, method for real-time and self-adaptive display and control during traffic signal countdown of the present invention, can satisfy advanced real-time adaptive traffic signal control system, can make the traffic signals count-down device show the traffic signals wait and length excess time of passing through scientifically and rationally, meet the traffic cognitive psychological of traffic participant.
2, method for real-time and self-adaptive display and control during traffic signal countdown of the present invention, can with the supporting use of real-time adaptive traffic signal control system.Fixedly red light or green light section Gf and Rf be arranged on transition period between green light and the red light (or red light and green light), fixedly the setting in green light (red light) stage can not influence the function of real-time adaptive traffic control without prejudice to self-adaptation traffic control relative theory.Make the count-down device of operation according to the present invention and can follow the tracks of performance period light color duration variation, possess corresponding adjustment function.
3, method for real-time and self-adaptive display and control during traffic signal countdown of the present invention can carry out upgrading on the basis of existing traffic signals countdown time system, implement easily to promote; And can be behind real-time adaptive control system degradation decide use under the timing state of a control, to real-time adaptive traffic signals control technology at home and abroad use and development provides effective technical support and guarantee.
Four, description of drawings:
Fig. 1: method for real-time and self-adaptive display and control during traffic signal countdown workflow synoptic diagram of the present invention;
Fig. 2: method for real-time and self-adaptive display and control during traffic signal countdown green light section of the present invention is formed synoptic diagram;
Fig. 3: method for real-time and self-adaptive display and control during traffic signal countdown red light section of the present invention is formed synoptic diagram;
Fig. 4: the synoptic diagram that self-adapting traffic signal countdown display docks with the real-time adaptive traffic signal control system.
Five, embodiment:
Embodiment one: referring to Fig. 1~Fig. 4.Method for real-time and self-adaptive display and control during traffic signal countdown of the present invention, comprise two level content, the one, crossing real-time adaptive traffic signaling equipment is to the control of signal lamp and supporting count-down device, and the 2nd, supporting on this basis count-down device is to the control of video data.Wherein to be one be core with the microcomputer to count-down device, is subjected to the intelligent digital display device of traffic signaling equipment control, its unitary construction and profile and generally the timing traffic signals count-down device of deciding of employing do not have difference.
Referring to Fig. 1: method for real-time and self-adaptive display and control during traffic signal countdown workflow synoptic diagram of the present invention.Method for real-time and self-adaptive display and control during traffic signal countdown of the present invention at first is divided into adjustable section Ga of a green light and a complementary fixedly green light section Gf with each green light stage G that shows in real time; Each red light phase R that shows in real time is divided into adjustable section Ra of a red light and a complementary fixedly red light section Rf; Its two, to green light or the red light phase carried out, count-down device at first shows the predicted value of light color clearance duration, and the demonstration of successively decreasing on this basis; They are three years old, count-down device is in procedure for displaying, the signal Gs or the Rs that send according to the traffic signaling equipment that receives regulate video data: (1) if current light color clearance duration greater than predicted value, then count-down device is showing fixedly green light section Gf or fixedly will suspend data before the red light section Rf and successively decrease, wait for a period of time and lack duration to supply, show fixedly green light section Gf or fixing red light section Rf duration and be decremented to zero then, (2) if current light color clearance duration equals predicted value, then count-down device directly shows the predicted value duration and is decremented to zero, (3) if current light color clearance duration less than predicted value, count-down device then showing fixedly green light section Gf or fixedly deducting the unnecessary duration of predicted value before the red light section Rf, shows complementary fixedly green light section Gf or fixing red light section Rf duration and be decremented to zero then.
Among Fig. 2, Fig. 3, Ga represents adjustable section of real-time adaptive control green light down, and Gf represents complementary fixedly green light section, and Gs is the changeover control signal between Ga and the Gf; Ra represents adjustable section of real-time adaptive control red light down, and Rf represents complementary fixedly red light section, and Rs is the changeover control signal between Ra and the Rf.
Wherein Ga and Ra are green light section and the red light section under the real-time adaptive control, along with the adjustment variation increase or the minimizing of real-time adaptive traffic signal control system; Gf and Rf are the artificial auxiliary canned paragraph that is provided with, and the big I of its value is decided according to the crossing traffic demand, and numerical value is changeless after determining.Gs is the switching signal between Ga and the Gf, and Rs is the switching signal between Ra and the Rf.Fixedly stage Gf and Rf the transition period setting that utilizes between green light and the red light (red light and green light) is set, can not run counter to self-adaptation traffic control relative theory, can not influence the function of real-time adaptive traffic control.
Countdown display control method of the present invention, divide three phases to finish to the green light carried out or the procedure for displaying of red light phase traffic signals count-down device: count-down device showed that at first this cycle green light or red light light color show the predicted value of duration when the phase one opened at light color, and successively decreased on this basis; Subordinate phase, count-down device is regulated video data before and after receiving signal Gs that the crossing traffic teleseme sends or Rs: if this light color clearance duration is greater than predicted value, then count-down device will suspend numeral and successively decreases before showing complementary canned paragraph, waiting for a period of time to supply lacks duration, shows fixedly green light section Gf or fixing red light section Rf duration and be decremented to zero then; If this light color clearance duration equals predicted value, then count-down device directly shows predicted value and is decremented to zero; If this light color clearance duration is less than predicted value, count-down device then showing fixedly green light section Gf or fixedly deducting the unnecessary duration of predicted value before the red light section Rf, shows complementary fixedly green light section Gf or fixing red light section Rf duration and be decremented to zero then.Adjust because the real-time adaptive traffic control is a small step length, do not have significantly and beat, and this moment is far away apart from count-down device " 0 field " demonstration, can not impact the crossing passenger, also can not cause passenger's excessive concern; Phase III is after entering fixedly stage demonstration, because length is changeless during this period of time, count-down device successively decreases and shows residue clearance duration, can be synchronized to zero with the operation of this light color, pay close attention to most the light color conversion excess time definite in the moment the passenger, can reach the purpose of efficient and safe passing for the passenger shows.It is an organic whole that above-mentioned three phases shows.
In Fig. 2, both common complete green light stages of composition of Ga+Gf=G.When opening in the green light stage, what count-down device showed is G of last cycle value, adjusts in view of the real-time adaptive traffic control is that small step is long, and present embodiment will be gone up the predicted value of cycle G value as this phase of the cycles duration.Ga is adjustable section of a real-time adaptive control green light down, increases or minimizing along with the adjustment of real-time adaptive traffic control system changes; The complementary fixedly green light section of Gf for setting; Gs is the switching signal between Ga and the Gf, issues count-down device by traffic signaling equipment before Gf opens.
Among Fig. 3, complete red light phase of both common compositions of Ra+Rf=R.When red light phase was opened, what count-down device showed was R of last cycle value.Adjust in view of the real-time adaptive traffic control is that small step is long, present embodiment will be gone up the predicted value of cycle R value as this phase of the cycles duration.Ra is adjustable section of a real-time adaptive control red light down, along with the adjustment of real-time adaptive traffic control system changes and increases or minimizing; The complementary fixedly red light section of Rf for setting; Rs is the switching signal between Ra and the Rf, issues count-down device by traffic signaling equipment before Gf opens.
Fig. 4 is the traffic signal control system structural representation of display control method of the present invention so as to realizing, system comprises real-time adaptive traffic signals control center, trunking and intersection annunciator, intersection annunciator control linkage signal lamp and countdown display.As can be seen from Figure, the traffic signals count-down device that the present invention relates to does not need to use the private communication line with docking of crossing traffic teleseme, can utilize existing signal lamp control line to be transferred on the countdown display and realize.The countdown display can correspondingly show left-hand rotation green light, craspedodrome green light, right-hand rotation green light, the time in a plurality of stages such as Quan Hong.The color of a plurality of stage display digits can be identical, also can be different.
Embodiment two: referring to Fig. 1~Fig. 4.Real-time adaptive traffic signals count-down device display control method of the present invention, different with embodiment one is: when count-down device was opened at light color, at first the predicted value of Xian Shiing was the mean value of this light color stage duration of nearly several cycle.For example, can be the mean value of nearly this light color stage duration of two cycles, or be the mean value of nearly three, four or five these light color stage durations of cycle.

Claims (2)

1. method for real-time and self-adaptive display and control during traffic signal countdown, on real-time adaptive traffic signal control system basis, by traffic signaling equipment the demonstration of signal lamp and count-down device is controlled, it is characterized in that: one is divided into a green light adjustable section (Ga) and a complementary fixedly green light section (Gf) with each green light stage (G) that shows in real time; Each red light phase (R) that shows in real time is divided into a red light adjustable section (Ra) and a complementary fixedly red light section (Rf); Complementary fixedly green light section (Gf) and complementary fixedly red light section (Rf) are artificial normal values that is provided with, and its numerical values recited is according to the crossing traffic requirements set, and numerical value is changeless after determining;
Its two, to green light stage or the red light phase carried out, count-down device at first shows the predicted value of light color duration, and the demonstration of successively decreasing on this basis; This shows the predicted value of light color duration, is actual green light stage (G) or red light phase (R) duration of letting pass of last one-period, or is the mean value of nearly 2~5 green light stages in cycle (G) or red light phase (R) duration;
They are three years old, count-down device is in procedure for displaying, according to the signal (Gs or Rs) that traffic signaling equipment sends video data is regulated: (1) current light color duration is during greater than predicted value, count-down device is showing that complementary fixedly green light section (Gf) or the complementary preceding data of will suspending of fixedly red light section (Rf) successively decrease, wait for a period of time and lack duration to supply, show complementary fixedly green light section (Gf) or complementary fixedly red light section (Rf) duration then and be decremented to zero, when (2) current light color duration equals predicted value, count-down device directly shows the predicted value duration and is decremented to zero, when (3) current light color duration is less than predicted value, count-down device is then showing that complementary fixedly green light section (Gf) or complementary fixedly red light section (Rf) deduct the unnecessary duration of predicted value before, shows complementary fixedly green light section (Gf) or complementary fixedly red light section (Rf) duration then and is decremented to zero.
2. method for real-time and self-adaptive display and control during traffic signal countdown according to claim 1 is characterized in that: count-down device divides three phases to finish to the green light carried out or the procedure for displaying of red light phase:
Phase one at first shows the predicted value duration when light color is opened, and successively decreases on this basis;
Subordinate phase is the switching signal of sending according to traffic signaling equipment, and video data is regulated;
Phase III is to enter complementary fixedly green light section (Gf) or complementary fixedly red light section (Rf) demonstration.
CN2009100659484A 2009-08-27 2009-08-27 Method for real-time and self-adaptive display and control during traffic signal countdown Expired - Fee Related CN101635095B (en)

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