CN103500505B - A kind of automobile that obtains waits for the method for traffic light time at road junction - Google Patents
A kind of automobile that obtains waits for the method for traffic light time at road junction Download PDFInfo
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- CN103500505B CN103500505B CN201310471573.8A CN201310471573A CN103500505B CN 103500505 B CN103500505 B CN 103500505B CN 201310471573 A CN201310471573 A CN 201310471573A CN 103500505 B CN103500505 B CN 103500505B
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Abstract
A kind of automobile that obtains waits for the method for traffic light time at road junction, the current busy extent that vehicle flowrate reflects urban road junction is substituted with the road junction traffic lights stand-by period, its technique effect is identical, but, need to install additional that to feel equipment, Car license recognition equipment or radio frequency identification equipment on a large scale different from acquisition vehicle flowrate, the present invention drops into very few, can implement on a large scale.
Description
Technical field
The present invention relates to urban road access control technology, especially urban road junction traffic light time control technology.
Background technology
The controlling system of traffic light of urban road junction generally adopts fixing current and waiting time, automatic dynamic to adjust the current of traffic lights and waiting time, the vehicle flowrate of necessary Real-time Collection road junction.At present, the method for Real-time Collection road junction vehicle flowrate feel with mainly containing, Car license recognition, radio-frequency (RF) identification etc.
Summary of the invention
The present invention obtains geographical location information by mobile device and automatically gathers and calculate the stand-by period of automobile by road junction, its benefit drops into without the need to feeling equipment, Car license recognition equipment or radio frequency identification equipment on a large scale, play the index that quantizes that can reflect road junction heavy traffic degree that same vehicle flowrate meaning is identical, the intellectuality of urban transportation, Automated condtrol can be further used for.
Obtain traffic light time waited for by an automobile method at road junction, comprise mobile device, feature is: waiting area, sails out of region, waits for traffic lights initial time, waits for the traffic lights end time,
Described mobile device energy and vehicle intelligent apparatus bound have geographical location information acquisition capability by vehicle intelligent equipment;
Described waiting area refers to that automobile waits for the region of traffic light signal at road junction, and have only ID attribute, its border can be described by geographical location information;
Described region of sailing out of refers to that automobile enters the region behind next section by road junction, there is only ID attribute, its border can be described by geographical location information, according to vehicle traveling direction sail out of region can be further divided into craspedodrome sail out of region, turn left sail out of region, turn right sail out of region;
Describedly sail out of region and waiting area has incidence relation, namely there is the waiting area being positioned at same road junction associated therewith in arbitrary region of sailing out of;
Described wait traffic lights initial time refers to that automobile enters waiting area and obtained by mobile device and the system time stored;
The described wait traffic lights end time refers to that automobile enters and sails out of region and obtained by mobile device and the system time stored;
Regulation: when mobile device program starts, the initial ID of current waiting area is empty;
Step is:
(1) mobile device obtains current geographic position information;
(2) current geographic position obtained is positioned at and sails out of region and then continue this step: if current waiting area ID is for empty or sail out of region and current waiting area does not exist incidence relation, go to step (4), otherwise, if wait for that traffic lights initial time is 0, go to step (4), again otherwise, make the current time in system of mobile device for waiting for the traffic lights end time, using the wait traffic lights end time with wait for that the difference of traffic lights initial times is as the traffic lights stand-by period together with waiting area ID with sail out of region ID upload server, afterwards, order waits for that traffic lights initial time is 0, go to step (4),
(3) current geographic position obtained is positioned at waiting area and then continues this step: if the existing ID of waiting area is identical with the current waiting area ID that mobile device stores, go to step (4), otherwise, the current waiting area ID of mobile device storage is upgraded with the existing ID of waiting area, and order waits for that traffic lights initial time equals the current time in system of mobile device, continues step (4) afterwards;
(4) above-mentioned steps is repeated through certain hour interval.
The above-mentioned time interval through certain hour interval indication can be 5 seconds, and this depends on that obtaining the busy balance of geographical location information computing to urban road passage rate and mobile device considers.Generally speaking, speed per hour 36 kilometers/hour, represent that automobile operating range per second is 10 meters, the distance of automobile 5 seconds wheeleds is 50 meters.In like manner, speed per hour 72 kilometers/hour, represent that automobile operating range per second is 20 meters, the distance of automobile 5 seconds wheeleds is 100 meters.Therefore, the waiting area of corresponding 5 seconds and sail out of region, its zone length at 50 meters or more than 100, so just should can guarantee that automobile can obtain geographical location information at least one times in region.
For a large amount of traffic lights stand-by period upload server,
Server can be set up with waiting area ID and sail out of the set of variables that region ID is associated: waits for T.T. and vehicle number, and object is the calculating road junction traffic lights average latency,
Server also can set up tables of data, is called uplink time table last time, and the item of tables of data can comprise: waiting area ID, sail out of region ID, last registration uplink time, wherein waiting area ID, to sail out of region ID be key word,
Server also can set up tables of data, is called the road junction traffic lights cycle, and the item of tables of data can comprise: waiting area ID, sail out of region ID, traffic lights cycle, wherein waiting area ID, to sail out of region ID be key word, further, the traffic lights cycle refers to the time interval that traffic lights circulation occurs
Accordingly, server carry out the road junction traffic lights average latency calculate step be:
(1) server often obtains a traffic lights stand-by period and uploads, even the current time in system of server is uplink time, is called this uplink time;
(2) according to the waiting area ID that uploads with sail out of region ID and searched uplink time last time in last time in uplink time table, if uplink time last time found out exceedes with waiting area ID with the mistiming of this uplink time and sails out of traffic lights cycle corresponding to region ID, then empty set of variables, even wait for that T.T. and vehicle number are 0, continue step (3), otherwise directly go to step (3);
(3) according to the waiting area ID that uploads with sail out of region ID and upgrade last time uplink time with this uplink time in last time in uplink time table;
(4) with the traffic lights stand-by period of uploading cumulative wait T.T., vehicle number adds 1;
(5) the road junction traffic lights average latency is calculated according to wait T.T. and vehicle number.
Easy for calculating, the above-mentioned road junction traffic lights cycle can be unified by 30 seconds.Because, generally speaking, at road junction, all directions green light summation, namely all directions clearance temporal summation is not less than 30 seconds, be equivalent to every direction let pass the time be not less than 7.50 seconds.
The invention has the beneficial effects as follows:
One, the present invention's road junction traffic lights stand-by period substitutes vehicle flowrate to reflect the current busy extent of urban road junction, its technique effect is identical, but, need to install additional that to feel equipment, Car license recognition equipment or radio frequency identification equipment on a large scale different from acquisition vehicle flowrate, the present invention drops into very few, can implement on a large scale.
Two, can traffic light time be regulated and controled according to the vehicle flowrate of road junction, reach the object of urban traffic control.But plan in conjunction with the urban road driving path of urban road passage rate, the vehicle flowrate of road junction is not just the numerical value that can be converted into transit time, and the road junction traffic lights stand-by period that the present invention provides is exactly transit time, therefore, in Modern City Traffic, the road junction traffic lights stand-by period of the present invention is more reasonable than vehicle flowrate, has more technical meaning.
Accompanying drawing explanation
Fig. 1 is signal of the present invention.
Embodiment
The invention described above scheme essence obtains geographical location information by vehicle intelligent equipment.In other words, the driving trace of geographic position track inherently automobile that obtains of the present invention program.In the present invention program, mobile device role is wireless telecommunications effects.
Broadly, mobile device self, as smart mobile phone, also has geographic position acquisition capability.With mobile device, do not bind vehicle intelligent equipment, realize the present invention, needing to judge further is that pedestrian passes through road junction by road junction or automobile.Otherwise pedestrian and automobile are different by the time required for road junction, be all used for without distinction calculating the road junction traffic lights average latency, error can be out of control.To this, pedestrian and automobile can be distinguished by the method for technology, the situation of pedestrian is rejected.This and the present invention there is no the different of essence, form and encroach right to the present invention.
Claims (2)
1. obtain traffic light time waited for by an automobile method at road junction, step is:
(1) mobile device obtains current geographic position information;
(2) current geographic position obtained is positioned at and sails out of region and then continue this step: if current waiting area ID is for empty or sail out of region and current waiting area does not exist incidence relation, go to step (4), otherwise, if wait for that traffic lights initial time is 0, go to step (4), again otherwise, make the current time in system of mobile device for waiting for the traffic lights end time, using the wait traffic lights end time with wait for that the difference of traffic lights initial times is as the traffic lights stand-by period together with waiting area ID with sail out of region ID upload server, afterwards, order waits for that traffic lights initial time is 0, go to step (4),
(3) current geographic position obtained is positioned at waiting area and then continues this step: if the existing ID of waiting area is identical with the current waiting area ID that mobile device stores, go to step (4), otherwise, the current waiting area ID of mobile device storage is upgraded with the existing ID of waiting area, and order waits for that traffic lights initial time equals the current time in system of mobile device, continues step (4) afterwards;
(4) above-mentioned steps is repeated through certain hour interval;
Wherein,
Described mobile device energy and vehicle intelligent apparatus bound have geographical location information acquisition capability by vehicle intelligent equipment;
Described waiting area refers to that automobile waits for the region of traffic light signal at road junction, and have only ID attribute, its border is described by geographical location information;
Described region of sailing out of refers to that automobile enters the region behind next section by road junction, there is only ID attribute, its border is described by geographical location information, sails out of region be further divided into that region is sailed out of in craspedodrome, region is sailed out of in left-hand rotation or region is sailed out of in right-hand rotation according to vehicle traveling direction;
Describedly sail out of region and waiting area has incidence relation, namely there is the waiting area being positioned at same road junction associated therewith in arbitrary region of sailing out of;
Described wait traffic lights initial time refers to that automobile enters waiting area and obtained by mobile device and the system time stored;
The described wait traffic lights end time refers to that automobile enters and sails out of region and obtained by mobile device and the system time stored;
Regulation: when mobile device program starts, the initial ID of current waiting area is empty.
2. a kind of automobile that obtains waits for the method for traffic light time at road junction according to claim 1, the traffic lights stand-by period is together with waiting area ID and sail out of region ID upload server, for a large amount of traffic lights stand-by period upload server, the step that server carries out the calculating of road junction traffic lights average latency is:
(1) server often obtains a traffic lights stand-by period and uploads, even the current time in system of server is uplink time, is called this uplink time;
(2) according to the waiting area ID that uploads with sail out of region ID and searched uplink time last time in last time in uplink time table, if uplink time last time found out exceedes with waiting area ID with the mistiming of this uplink time and sails out of traffic lights cycle corresponding to region ID, then empty set of variables, even wait for that T.T. and vehicle number are 0, continue step (3), otherwise directly go to step (3);
(3) according to the waiting area ID that uploads with sail out of region ID and upgrade last time uplink time with this uplink time in last time in uplink time table;
(4) with the traffic lights stand-by period of uploading cumulative wait T.T., vehicle number adds 1;
(5) the road junction traffic lights average latency is calculated according to wait T.T. and vehicle number;
Wherein,
Server is set up with waiting area ID and is sailed out of the set of variables that region ID is associated: wait for T.T. and vehicle number, and object is the calculating road junction traffic lights average latency,
Server sets up tables of data, and be called uplink time table last time, the item of tables of data comprises: waiting area ID, sail out of region ID and last registration uplink time, wherein waiting area ID, to sail out of region ID be key word,
Server sets up tables of data, be called the road junction traffic lights cycle, the item of tables of data comprises: waiting area ID, sail out of region ID and traffic lights cycle, wherein waiting area ID, to sail out of region ID be key word, further, the traffic lights cycle refers to the time interval that traffic lights circulation occurs.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4156143A1 (en) * | 2021-09-24 | 2023-03-29 | Autonomous A2Z | Method for predicting traffic light information by using lidar and server using the same |
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| CN108961803A (en) * | 2017-05-18 | 2018-12-07 | 中兴通讯股份有限公司 | Vehicle drive assisting method, device, system and terminal device |
| CN110444012A (en) * | 2019-06-26 | 2019-11-12 | 南京慧尔视智能科技有限公司 | The calculation method and device of intersection vehicles delay time at stop and stop frequency |
| CN115171405B (en) * | 2022-06-28 | 2023-09-22 | 亿咖通(湖北)技术有限公司 | Traffic light intersection passing time determining method and device, electronic equipment and medium |
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| CN101477747A (en) * | 2009-01-05 | 2009-07-08 | 东南大学 | Signal control method for high density road grid in traffic rush hour |
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