CN105513355B - A kind of crossing key V/C than acquisition methods and system - Google Patents
A kind of crossing key V/C than acquisition methods and system Download PDFInfo
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- CN105513355B CN105513355B CN201511009268.2A CN201511009268A CN105513355B CN 105513355 B CN105513355 B CN 105513355B CN 201511009268 A CN201511009268 A CN 201511009268A CN 105513355 B CN105513355 B CN 105513355B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
Abstract
The present invention provide a kind of crossing key V/C than acquisition methods, consider the V/C of each track group than the V/C of the, potential route of phase and route than the critical path of, phase V/C than, critical path loss temporal summation, the crucial V/C ratios at crossing are calculated based on these factors, therefore a more reasonable, accurate crossing key V/C ratio is obtained, in favor of providing support for the science, reasonability and promptness of communications policy.The invention further relates to it is a kind of be used for calculate crossing key V/C than computer system.
Description
Technical field
The present invention relates to intelligent transportation field, in particular to a kind of crossing key V/C than acquisition methods and system.
Background technology
Carried out with the development of economy and society, the high accident rate that automobile is brought forces people to put into substantial amounts of manpower and materials
The research of traffic safety, wherein the analysis and prevention to accident are particularly subject to the concern and attention of people.Lot of domestic and international research
Person has carried out substantial amounts of analysis and research to the volume of traffic and the relation of traffic accident, and the model that returns that accidents happened.The volume of traffic is independent
In the absolute numerical value of road in itself, and the ratio V/C ratios of the traffic capacity of the volume of traffic and respective stretch are reaction roads
The relative quantity of the degree of crowding, it can more react the traffic of road than the volume of traffic, also more close with the relation of traffic accident.
V/C and the relation of traffic accident can not only provide an index for the prevention of traffic accident, and be also used as road travel
The evaluation of state, the safety evaluation of highway, planning of highways, a reference of reorganization and expansion.
Although the existing numerous researchers of foreign countries are studied than the relation between accident rate V/C, and are proposed similar
Relation curve, but these researchs basis it is mostly be the environment based on foreign countries, the posture of driver custom, accident statistics side
Calculating of method and the traffic capacity etc., these differences are more bigger than with the relationship affect of accident rate to V/C.At present, we are not yet
The V/C adapted under existing domestic communication environment is seen to disclose with calculating correlation technique than research.
The content of the invention
The first aspect of the present invention provide a kind of crossing key V/C than acquisition methods, including：
Step 1, Protocol Numbers and cycle duration C from the cycle time table of phase intersection during acquisition renewal time, side
Method is：All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, when
Front case refers to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, obtain current phase from phase-group and SCATS scheme relation tables
Group #；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the car occurred in two continuous phases
Road group, only calculate a v/s ratio；
Count the track number N that each track group includesi, initialize the saturation volume rate s in track0=1800/h；
Then, track group i saturation volume rate si=Ni*s0, unit is：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are asked
With obtain qi, then calculate the actual flow v in each trackj=qj×6；
Then, track group i actual flow rate vi=∑ vj, unit is：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group in continuous two or more phases
Middle appearance, and its lane number is identical, then exists and open early disconnected phase late, go to step 11；If any one track group
Do not repeated in continuous two phases, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Turn step
Rapid 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, it is bigger to retain v/s
, the crucial track group as phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e.,Each phase
Bit number gives a loss time t=3s, then loss time L=phases number * total in a cycle loss time t, then
The crucial v/c ratios at this crossing are：C is the cycle duration obtained in step 1.
According to the present invention improvement, it is also proposed that it is a kind of be used for determine crossing key V/C than computer system, including：
Display, be arranged for show crossing key V/C than result of calculation；
One or more processors；
Memory, program module and data that storage is used by one or more of processors are arranged for, these
Program module is configured to realize crossing key V/C than calculating in the following manner when being executed by one or more processors：
Step 1, Protocol Numbers and cycle duration C from the cycle time table of phase intersection during acquisition renewal time, side
Method is：All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, when
Front case refers to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, obtain current phase from phase-group and SCATS scheme relation tables
Group #；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the car occurred in two continuous phases
Road group, only calculate a v/s ratio；
Count the track number N that each track group includesi, initialize the saturation volume rate s in track0=1800/h；
Then, track group i saturation volume rate si=Ni*s0, unit is：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are asked
With obtain qi, then calculate the actual flow v in each trackj=qj×6；
Then, track group i actual flow rate vj=∑ vj, unit is：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group in continuous two or more phases
Middle appearance, and its lane number is identical, then exists and open early disconnected phase late, go to step 11；If any one track group
Do not repeated in continuous two phases, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Turn step
Rapid 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, it is bigger to retain v/s
, the crucial track group as phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e.,Each phase
Bit number gives a loss time t=3s, then loss time L=phases number * total in a cycle loss time t, then
The crucial v/c ratios at this crossing are：C is the cycle duration obtained in step 1.
In further embodiment, the computer system also includes：
Network transceiving module, for by crossing key V/C than result of calculation send to traffic control center.
It should be appreciated that as long as all combinations of aforementioned concepts and the extra design described in greater detail below are at this
Sample design it is not conflicting in the case of can be viewed as the disclosure subject matter a part.In addition, required guarantor
All combinations of the theme of shield are considered as a part for the subject matter of the disclosure.
Can be more fully appreciated from the following description with reference to accompanying drawing present invention teach that foregoing and other aspect, reality
Apply example and feature.The feature and/or beneficial effect of other additional aspects such as illustrative embodiments of the present invention will be below
Description in it is obvious, or by according to present invention teach that embodiment practice in learn.
Brief description of the drawings
Accompanying drawing is not intended to drawn to scale.In the accompanying drawings, each identical or approximately uniform group shown in each figure
It can be indicated by the same numeral into part.For clarity, in each figure, not each part is labeled.
Now, by example and the embodiment of various aspects of the invention will be described in reference to the drawings, wherein：
Fig. 1 be according to the crossing key V/C of certain embodiments of the invention than acquisition methods flow chart.
Embodiment
In order to know more about the technology contents of the present invention, especially exemplified by specific embodiment and institute's accompanying drawings are coordinated to be described as follows.
Each side with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.
It is not intended to cover all aspects of the invention for embodiment of the disclosure.It should be appreciated that a variety of designs presented hereinbefore and reality
Apply example, and those designs described in more detail below and embodiment can in many ways in any one come it is real
Apply, because design disclosed in this invention and embodiment are not limited to any embodiment.In addition, disclosed by the invention one
A little aspects can be used alone, or otherwise any appropriately combined be used with disclosed by the invention.
With reference to shown in Fig. 1, according to an embodiment of the invention, a kind of crossing key V/C than acquisition methods, including：
Step 1, Protocol Numbers and cycle duration C from the cycle time table of phase intersection during acquisition renewal time, side
Method is：All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, when
Front case refers to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, obtain current phase from phase-group and SCATS scheme relation tables
Group #；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the car occurred in two continuous phases
Road group, only calculate a v/s ratio；
Count the track number N that each track group includesi, initialize the saturation volume rate s in track0=1800/h；
Then, track group i saturation volume rate si=Ni*s0, unit is：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are asked
With obtain qi, then calculate the actual flow v in each trackj=qj×6；
Then, track group i actual flow rate vi=∑ vj, unit is：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group in continuous two or more phases
Middle appearance, and its lane number is identical, then exists and open early disconnected phase late, go to step 11；If any one track group
Do not repeated in continuous two phases, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Turn step
Rapid 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, it is bigger to retain v/s
, the crucial track group as phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e.,Each phase
Bit number gives a loss time t=3s, then loss time L=phases number * total in a cycle loss time t, then
The crucial v/c ratios at this crossing are：C is the cycle duration obtained in step 1.
Technical scheme more than, thus step obtain crossing key V/C ratios, data needed for it are accurate, reality
When, the complexity of calculating process is low, speed is fast, it is possible to achieve crossing key V/C than timely acquisition, and keep higher standard
Exactness and real-time.
In the solution of the present invention, the V/C of each track group is considered than, the potential route of phase and the V/C of route
Than, phase critical path V/C than the loss temporal summation of, critical path, the key at crossing is calculated based on these factors
V/C ratios, therefore and obtain a more reasonable, accurate crossing key V/C ratio, in favor of the science for communications policy, close
Rationality and promptness provide support.
In the aforementioned embodiment, we are based on the resources such as electronic police data, digital road net data, the input that can be obtained
Title, the type cases of data will be further explained below.
1) phase-group and SCATS scheme relation tables MD_PHASE_GROUP_SCATS_REL
2) SCATS and crossing relation table MD_INTERSECTION_SCATS_REL
3) phase-group table MD_PHASE_GROUP
3) phase meter MD_PHASE
4) the track MD_LANES_OF_PHASE that phase includes
5) track group MD_LANE_GROUP
6) phase intersection cycle time Table A Y_RESULT_CROSS_CYCLE_TIME
| Crossing ID | Current protocols are numbered | Time started | Cycle time |
| CROSS_ID | PLAN_ID | BEGIN_TIME | CYCLE_TIME |
| Varchar | NUMBER | LONG(13) | NUMBER |
The phase intersection cycle time table is obtained by reading SCATS signal timing dials system.
7) track flowmeter AY_RESULT_LANE_VOLUMN
With reference to shown in Fig. 1, according to the present invention improvement, it is also proposed that it is a kind of be used for determine crossing key V/C than computer
System, including：
Display, be arranged for show crossing key V/C than result of calculation；
One or more processors；
Memory, storage is arranged for by one or more of.The program module and data that reason device uses, these
Program module is configured to by one or more processors, realizes crossing key V/C than calculating in the following manner during execution：
Step 1, Protocol Numbers and cycle duration C from the cycle time table of phase intersection during acquisition renewal time, side
Method is：All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, when
Front case refers to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, obtain current phase from phase-group and SCATS scheme relation tables
Group #；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the car occurred in two continuous phases
Road group, only calculate a v/s ratio；
Count the track number N that each track group includesi, initialize the saturation volume rate s in track0=1800/h；
Then, track group i saturation volume rate si=Ni*s0, unit is：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are asked
With obtain qi, then calculate the actual flow v in each trackj=qj×6；
Then, track group i actual flow rate vi=∑ vj, unit is：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group in continuous two or more phases
Middle appearance, and its lane number is identical, then exists and open early disconnected phase late, go to step 11；If any one track group
Do not repeated in continuous two phases, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Turn step
Rapid 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, it is bigger to retain v/s
, the crucial track group as phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e.,Each phase
Bit number gives a loss time t=3s, then loss time L=phases number * total in a cycle loss time t, then
The crucial v/c ratios at this crossing are：C is the cycle duration obtained in step 1.
In further embodiment, the computer system also includes：
Network transceiving module, for by crossing key V/C than result of calculation send to traffic control center.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (4)
1. a kind of crossing key V/C than acquisition methods, it is characterised in that comprise the following steps：
Step 1, the Protocol Numbers from the cycle time table of phase intersection during acquisition renewal time and cycle duration C, method are：
All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, Current protocols
Refer to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, current phase-group is obtained from phase-group and SCATS scheme relation tables and is compiled
Number；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the track group occurred in two continuous phases,
Only calculate a v/s ratio；
The track number Ni that each track group includes is counted, initializes the saturation volume rate s0=1800/h in track；
Then, track group i saturation volume rate si=Ni*s0, unit are：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are summed,
Qj is obtained, then calculates actual flow vj=qj × 6 in each track；
Then, track group i actual flow rate vi=∑ vj, unit are：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group to go out in continuous two or more phases
It is existing, and its lane number is identical, then exists and open early disconnected phase late；If any one track group is in continuous two phases
Do not repeated in position, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Go to step 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, reservation v/s is bigger, makees
For the crucial track group of phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e., each phase bit number gives
One is lost time t=3s, then loss time L=phases number * total in a cycle loss time t, then this crossing pass
Key v/c ratios areC is the cycle duration obtained in step 1.
2. key V/C in crossing according to claim 1 than acquisition methods, it is characterised in that methods described more includes
Following steps：Crossing key V/C is sent to traffic control center than result of calculation.
3. it is a kind of be used for determine crossing key V/C than computer system, it is characterised in that the computer system includes：
Display, be arranged for show crossing key V/C than result of calculation；
One or more processors；
Memory, it is arranged for program module and data that storage is used by one or more of processors, these programs
Module is configured to realize crossing key V/C than calculating in the following manner when being executed by one or more processors：
Step 1, the Protocol Numbers from the cycle time table of phase intersection during acquisition renewal time and cycle duration C, method are：
All time starteds were less than in renewal time in table, took the Current protocols numbering PLAN_ID of newest a data, Current protocols
Refer to current intersection signal timing scheme；
Step 2, with SCATS phase-group ID=track ID, current phase-group is obtained from phase-group and SCATS scheme relation tables and is compiled
Number；
Step 3, all phase bit numbers are obtained with phase group # slave phase position table；
Step 4, the track group for taking from the group table of track phase to be included, the lane number that track group includes；
Step 5, determine to calculate the v/s of each track group than strategy, for the track group occurred in two continuous phases,
Only calculate a v/s ratio；
The track number Ni that each track group includes is counted, initializes the saturation volume rate s0=1800/h in track；
Then, track group i saturation volume rate si=Ni*s0, unit are：/ h；
Step 6, the track flows of 10 minutes before renewal time are obtained from track flowmeter, got 10 flows are summed,
Qj is obtained, then calculates actual flow vj=qj × 6 in each track；
Then, track group i actual flow rate vi=∑ vj, unit are：/ h；
Step 7, calculating track group i v/s ratios are：vi/si；
Step 8, determine whether to open early disconnected phase late, method is：If there is track group to go out in continuous two or more phases
It is existing, and its lane number is identical, then exists and open early disconnected phase late；If any one track group is in continuous two phases
Do not repeated in position, in addition to evergreen phase, then do not open early disconnected phase in this phasing scheme late；Go to step 9；
Step 9, the track group for belonging to same phase bit number, the v/s ratios of track group are contrasted, reservation v/s is bigger, makees
For the crucial track group of phase
Step 10, by this programme number in all phase bit numbers crucial track group v/s than summation, i.e., each phase bit number gives
One is lost time t=3s, then loss time L=phases number * total in a cycle loss time t, then this crossing pass
Key v/c ratios areC is the cycle duration obtained in step 1.
4. it is according to claim 3 be used for determine crossing key V/C than computer system, it is characterised in that the meter
Calculation machine system also includes：Network transceiving module, for by crossing key V/C than result of calculation send to traffic control center.
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| CN101739814B (en) * | 2009-11-06 | 2011-11-09 | 吉林大学 | SCATS coil data-based traffic state online quantitative evaluation and prediction method |
| CN101763735B (en) * | 2010-02-01 | 2015-02-25 | 王茜 | Method for controlling dynamic signal control system capable of having negative system loss time |
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Address after: 210012 room 627, Ning Shuang Road, Yuhuatai District, Nanjing, Jiangsu, 627 Patentee after: Ho whale cloud computing Polytron Technologies Inc Address before: 210012 No. 68 Bauhinia Road, Yuhuatai District, Jiangsu, Nanjing Patentee before: ZTEsoft Technology Co., Ltd. |