CN102509461B - Traffic signal coordinated control smooth transition and deviation correction method - Google Patents
Traffic signal coordinated control smooth transition and deviation correction method Download PDFInfo
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Abstract
The invention relates to a traffic signal coordinated control smooth transition and deviation correction method, which sequentially comprises the following steps of: (1) calculating the difference value P between the current time A and the coordinated control starting time T before entering the coordinated control, adding the transition period phase change value on the current phase green lamp value during the transition period entering if the difference value P is greater than zero, and otherwise, executing the current period phase; and (2) calculating the difference value Q between the current time A and the coordinated control starting time T after entering the coordinated control, executing the current period phase when the difference value Q is zero, subtracting Q from the current phase green lamp value when the difference value Q is in the set value range, and otherwise, adding the transition period phase change value on the current phase green lamp value during the transition period entering. The method has the advantages that the lamp color sudden change phenomenon caused by direct switching can be avoided, the recovery problem after the coordinated control interruption is solved, and the time deviation generated in the coordinated control operation can be automatically corrected.
Description
Technical field
The present invention relates to traffic signals control field, especially a kind of traffic signal coordinated control smooth transition and deviation correction method.
Background technology
Traditional traffic signal control system is when the coordination control moving based on clock, each coherent signal system enters in order to realize from control models such as multi-period, inductions the accurate transformation of coordinating control model, conventionally all take to put at one time the direct handoff technique of simultaneously carrying out Coordinated Control Scheme, this way is easy to cause the sudden change of signal system, causes the confusion of intersection traffic flow.
In having carried out each coherent signal system of coordinating to control, if run into the situation that power-off, manual control, traffic control etc. have interrupted coordinating to control sequential, whole signal system often cannot continue temporal accurate coordination control.In addition, each signal system is when carry out to coordinate controlling, and because of the accumulated time deviation that software execution time and hardware electronics individual difference produce, the accuracy that also can cause whole signal system to coordinate to control declines.
Summary of the invention
The object of the present invention is to provide and a kind ofly can guarantee that whistle control system seamlessly transits traffic signal coordinated control smooth transition and the deviation correction method that enters coordinated control mode and can automatically proofread and correct time deviation after entering coordinated control mode.
For achieving the above object, the present invention has adopted following technical scheme: a kind of traffic signal coordinated control smooth transition and deviation correction method, and the method comprises the step of following order:
(1) before entering coordination control, calculate current time A and the difference P that coordinates control start time T, zero if difference P is greater than, calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value; Otherwise, carry out current periodic phase;
(2) after entering coordination control, calculate current time A and the difference Q that coordinates control start time T, if difference Q equals zero, carry out current periodic phase; If difference Q in range of set value, makes current phase place green light value reduce Q; Otherwise calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value;
Before whistle control system enters coordination control, teleseme master chip calculates current time A and the difference P that coordinates control start time T, and computing formula is as follows:
P?=?T-（A?+?t?*?n）
Wherein, T is for coordinating control time initial time; A is the current real time; T is current demand signal periodic quantity; N is transient period number;
After whistle control system enters coordination control, teleseme master chip calculates current time A and the difference Q that coordinates control start time T, and computing formula is as follows:
Q?=?（A?–?T）?mod?t
Wherein, T is for coordinating control time initial time; A is the current real time; T is signal period value.
As shown from the above technical solution, the present invention is before whistle control system enters coordination control, utilize the change that the transient period seamlessly transits phase place green light, can avoid directly switching the light color sudden change problem causing and coordinate to control the coordinated recovery problem after being interrupted.In addition, the present invention, after whistle control system enters coordination control, utilizes the transient period to change phase place green light, can carry out automatic calibration to the time deviation of coordinating control of traffic signals generation in service, realizes the accurate coordination of traffic signals and controls.
Accompanying drawing explanation
Fig. 1 is that the present invention is at the workflow diagram entering before coordinating control;
Fig. 2 is that the present invention is at the workflow diagram entering after coordinating control.
Embodiment
A kind of traffic signal coordinated control smooth transition and deviation correction method, the method comprises the step of following order: (1) is before entering coordination control, calculate current time A and the difference P that coordinates to control start time T, if difference P is greater than zero, calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value; Otherwise, carry out current periodic phase; (2) after entering coordination control, calculate current time A and the difference Q that coordinates control start time T, if difference Q equals zero, carry out current periodic phase; If difference Q in range of set value, makes current phase place green light value reduce Q; Otherwise calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value.As shown in Figure 1, 2.
As shown in Figure 1, before whistle control system enters coordination control, teleseme master chip calculates current time A and the difference P that coordinates control start time T, and computing formula is as follows:
P?=?T-（A?+?t?*?n）
Wherein, T is for coordinating control time initial time; A is the current real time; T is current demand signal periodic quantity; N is transient period number, and the transient period counts the value of n and gets 3, and this value is convenient to the level and smooth coordination state of a control that is transitioned into.
If difference P is greater than zero, calculate respectively remaining quantity D of transient period recruitment C and transient period, computing formula is as follows:
C?=?P?÷?n
D?=?P?mod?n
Enter the transient period, transient period phase place green light value is that current phase place green light value adds C; The phase place green light value of last transient period is that current phase place green light value adds C and adds D.C is the business who obtains after dividing exactly, and D is the remainder obtaining after dividing exactly, and described transient period recruitment C and transient period, remaining quantity D was integer.
After the transient period executes, start to enter coordination control cycle.
By above-mentioned calculating, adjust, n the cycle of whistle control system before entering coordination control, its periodic quantity was that dynamic calculation goes out in order to seamlessly transit the cycle, obviously, n value larger (C and D value are less), its transient period value is more approaching with predetermined period value, crosses and gets over smoothly.
As shown in Figure 2, after whistle control system enters coordination control, teleseme master chip calculates current time A and the difference Q that coordinates control start time T, and computing formula is as follows:
Q?=?（A?–?T）?mod?t
Wherein, T is for coordinating control time initial time; A is the current real time; T is signal period value.
Described range of set value refers to the time range that is less than or equal to 3 seconds, if difference Q is less than or equal to 3 seconds, makes a current coordination periodic phase green light value reduce Q; If difference Q is greater than 3 seconds, calculate the difference of current demand signal periodic quantity t and difference Q, and transient period recruitment C and remaining quantity D of transient period, computing formula is as follows:
W?=?t?–?Q
C?=?W?÷?n
D?=?W?mod?n
Enter the transient period, transient period phase place green light value is that current phase place green light value adds C; The phase place green light value of last transient period is that current phase place green light value adds C and adds D.C is the business who obtains after dividing exactly, and D is the remainder obtaining after dividing exactly, and described transient period recruitment C and transient period, remaining quantity D was integer.
For example, the morning, 8:40:10 entered green wave band coordination state of a control, 9:00:00 power-off; 9:05:20 restores electricity, and the cycle is 120 seconds.Through the reaction time in a cycle, 9:07:20 enters adjustment cycle; According to 8:40:10, calculate, the normal control time should be at 9:08:10, and many 50 seconds of time, in mean allocation to three cycle, namely the cycle of three weeks adds respectively 16,16,18 seconds, is adjusted into 136,136,138 seconds cycle length, and the period 4 can recover normal.
By above-mentioned calculating, adjust, no matter whistle control system is after the interruption situations such as power-off are recovered, to reenter to coordinate to control, or after coordinating to control, long-play produced accumulated time deviation, it all can be by the detection of each cycle, deviation is eliminated after 1 to n transient period seamlessly transits, and then re-started accurate coordination control.
In a word, demand execution time in accurate Calculation coordination control of the present invention and the deviate of actual execution time, and this deviate is divided equally to elimination by increase or the minimizing of phase place green light execution time transient period, thereby reach signal system, coordinate the accurate execution of controlling.The present invention has on the basis of unified clock source and realizes based on whistle control system, while conventionally adopting GPS or networking clock server to carry out systematic unity school in practical application.
Claims (6)
1. traffic signal coordinated control smooth transition and a deviation correction method, the method comprises the step of following order:
(1) before entering coordination control, calculate current time A and the difference P that coordinates control start time T, zero if difference P is greater than, calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value; Otherwise, carry out current periodic phase;
(2) after entering coordination control, calculate current time A and the difference Q that coordinates control start time T, if difference Q equals zero, carry out current periodic phase; If difference Q in range of set value, makes current phase place green light value reduce Q; Otherwise calculate transient period phase change value, when entering the transient period, in current phase place green light value, increase this phase change value;
Before whistle control system enters coordination control, teleseme master chip calculates current time A and the difference P that coordinates control start time T, and computing formula is as follows:
P?=?T-（A?+?t?*?n）
Wherein, T is for coordinating control time initial time; A is the current real time; T is current demand signal periodic quantity; N is transient period number;
After whistle control system enters coordination control, teleseme master chip calculates current time A and the difference Q that coordinates control start time T, and computing formula is as follows:
Q?=?（A?–?T）?mod?t
Wherein, T is for coordinating control time initial time; A is the current real time; T is signal period value.
2. traffic signal coordinated control smooth transition according to claim 1 and deviation correction method, is characterized in that: if difference P is greater than zero, calculate respectively remaining quantity D of transient period recruitment C and transient period, computing formula is as follows:
C?=?P?÷?n
D?=?P?mod?n
Enter the transient period, transient period phase place green light value is that current phase place green light value adds C; The phase place green light value of last transient period is that current phase place green light value adds C and adds D.
3. traffic signal coordinated control smooth transition according to claim 1 and deviation correction method, is characterized in that: the described transient period counts the value of n and gets 3.
4. traffic signal coordinated control smooth transition according to claim 1 and deviation correction method, it is characterized in that: described range of set value refers to the time range that is less than or equal to 3 seconds, if difference Q is less than or equal to 3 seconds, make a current coordination periodic phase green light value reduce Q; If difference Q is greater than 3 seconds, calculate the difference of current demand signal periodic quantity t and difference Q, and transient period recruitment C and remaining quantity D of transient period, computing formula is as follows:
W?=?t?–?Q
C?=?W?÷?n
D?=?W?mod?n
Enter the transient period, transient period phase place green light value is that current phase place green light value adds C; The phase place green light value of last transient period is that current phase place green light value adds C and adds D.
5. traffic signal coordinated control smooth transition according to claim 2 and deviation correction method, is characterized in that: described transient period recruitment C and transient period, remaining quantity D was integer.
6. traffic signal coordinated control smooth transition according to claim 4 and deviation correction method, is characterized in that: described transient period recruitment C and transient period, remaining quantity D was integer.
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| CN102915645B (en) * | 2012-09-29 | 2014-12-24 | 大连理工大学 | Transition method for active phase-oriented arterial road coordinate signal control scheme |
| CN104050821B (en) * | 2014-06-24 | 2016-05-04 | 清华大学 | There is intersection signal control system and method that the cycle seamlessly transits algorithm function |
| CN104091451B (en) * | 2014-07-08 | 2016-06-29 | 公安部交通管理科学研究所 | The transition method of adjustment of main line of communication signal coordinated control |
| CN109236806B (en) * | 2018-11-26 | 2020-08-21 | 中联重科股份有限公司 | Control system and method for telescopic oil cylinder and engineering machinery |
| CN109534240B (en) * | 2018-11-26 | 2020-01-31 | 中联重科股份有限公司 | Telescopic oil cylinder, control system for telescopic oil cylinder and engineering machinery |
| CN109903570B (en) * | 2019-04-22 | 2020-10-13 | 吉林大学 | Intersection signal timing scheme smooth transition method under multi-period timing control |
| CN112216121B (en) * | 2020-09-23 | 2021-10-01 | 公安部交通管理科学研究所 | Traffic trunk line signal coordination control rapid transition adjustment method and system |
| CN115116243B (en) * | 2022-06-22 | 2023-11-03 | 连云港杰瑞电子有限公司 | Coordination control phase difference transition decision and distribution method |
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| JP特开2011-65556A 2011.03.31 |
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Denomination of invention: Traffic signal coordinated control smooth transition and deviation correction method Effective date of registration: 20141126 Granted publication date: 20140319 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI KELI INFORMATION INDUSTRY Co.,Ltd. Registration number: 2014990000991 |
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Denomination of invention: Traffic signal coordinated control smooth transition and deviation correction method Effective date of registration: 20151225 Granted publication date: 20140319 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI KELI INFORMATION INDUSTRY Co.,Ltd. Registration number: 2015990001169 |
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Denomination of invention: Smooth transition and deviation correction method of traffic signal coordination control Effective date of registration: 20220726 Granted publication date: 20140319 Pledgee: China Construction Bank Hefei Zhonglou sub branch Pledgor: ANHUI KELI INFORMATION INDUSTRY Co.,Ltd. Registration number: Y2022980011222 |