CN101958052B - GPS (Global Position System) based traffic flow and road jamming detection system - Google Patents
GPS (Global Position System) based traffic flow and road jamming detection system Download PDFInfo
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- CN101958052B CN101958052B CN2010102904089A CN201010290408A CN101958052B CN 101958052 B CN101958052 B CN 101958052B CN 2010102904089 A CN2010102904089 A CN 2010102904089A CN 201010290408 A CN201010290408 A CN 201010290408A CN 101958052 B CN101958052 B CN 101958052B
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Abstract
The invention relates to a GPS (Global Position System) based traffic flow and road jamming detection system, comprising vehicle-mounted terminals arranged on monitoring vehicles, a server used for receiving information of the vehicle-mounted terminals and carrying out congestion calculation, wherein the vehicle-mounted terminals are in communication connection with the server through a wireless communication network, and each vehicle-mounted terminal comprises a GPS module, a first communication module, a display module and an information processing module; the server comprise a congestion state calculation module and is used for acquiring real-time traffic information through a congestion function according to coordinate information sent back by different vehicle-mounted terminals, and the congestion function is adopted for calculating congestion degrees of different rod sections, if the congestion degree is larger than a preset congestion degree threshold, a congestion state is judged to be, and otherwise, a smooth state is judged to be; and a second communication module is used for sending traffic states of different road sections to the vehicle-mounted terminals. The invention has the advantages of low cost, strong practicability and easy popularization.
Description
Technical field
The invention belongs to magnitude of traffic flow supervisory system field, especially a kind of Forecast of Urban Traffic Flow supervisory system.
Background technology
Along with the increasing of city and freeway traffic flow amount, the traffic jam phenomenon happens occasionally.The convenience of people in order to go on a journey, often hope can be understood the magnitude of traffic flow situation in trip each highway section of passing through, so that the traffic route of adjustment oneself is avoided the highway section that traffic is relatively blocked up, thereby guarantees to arrive at the destination in the short period of time.At present in order to satisfy the people's that go on a journey this demand; The method that adopts has been placed the camera that is used to monitor traffic and vehicle peccancy situation often in each highway section; This camera can be sent to monitoring center with the image information of gathering; Monitoring center discerns the image information that receives automatically, thereby obtains the traffic in each highway section.The cost that causes this kind technical scheme to be implemented for the special circuit that is provided with of images information is very high; Simultaneously because the technology that image is discerned automatically and immature; Be difficult to obtain flow information exactly, this scheme is feasible in theory, in reality, is difficult at present use.
A kind of in addition comparatively common detection magnitude of traffic flow method is buried inductive coil in addition at the parting of the ways, is used for responding to the vehicle through the inductive coil top, thereby obtains the vehicle flowrate at each crossing.The benefit of this method is that data are accurate, relatively is not easy to produce error, and is with respect to last a kind of method, more accurate to the detection of the magnitude of traffic flow.Its shortcoming mainly contains some: the laying that 1. is coil bothers very much, need excavate road when laying coil, and the maintenance in the use is also very difficult; 2. only be to judge that according to the vehicle through coil top the magnitude of traffic flow is not rigorous, because do not have vehicle to pass through during red light, the traffic on the road is but also obstructed; 3. this scheme is only added up the flow at crossing, rather than entire road is monitored, and can not reflect the vehicle pass-through situation comprehensively.
Summary of the invention
Relatively poor for the cost accuracy high, flow information that overcomes existing traffic flow detection system, as can not to obtain congestion information, poor practicability, be not easy to promote deficiency, the present invention provides a kind of low cost, practical, the magnitude of traffic flow and the road congestion detection system based on the GPS that are easy to promote.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of magnitude of traffic flow and road congestion detection system based on GPS, comprise in order to be installed on the monitor vehicle car-mounted terminal and in order to information that receives car-mounted terminal and the server that crowd calculating; Said car-mounted terminal comprises:
The GPS module is in order to receive gps satellite signal and to calculate the coordinate information of current monitor vehicle;
First communication module sends to server in order to the coordinate information with current monitor vehicle, and the data message of reception server;
Display module in order to showing the electronic communication map, and according to latitude and longitude information, on said electronic communication map, and shows the congestion status of different roads with the position display of current monitor vehicle;
Message processing module in order to the coordinate information data layout is reorganized, and adds the communication module address in the information of sending and control is sent;
Said server comprises:
The congestion status computing module in order to the coordinate information according to different car-mounted terminal passbacks, obtains Real-time Traffic Information through the function that blocks up, and is specific as follows:
The time interval of GPS sampling is t; With 4t is an analystal section;
is initial time; At
4 GPS sampling instants are arranged afterwards, be respectively
constantly;
From t
0To t
4Analystal section among, the set M that is arranged in the vehicle between monitoring section is calculated in each GPS sampling instant, be designated as M respectively
0, M
1, M
2, M
3, M
4
With following method set of computations A
0, A
1, A
2,A
3, A
4:
The formula of crowded function is following:
Wherein, C representes crowding, and N representes number of track-lines, and card (Ai) representes set A
iThe number of middle element;
Adopt the crowding in crowded each different highway sections of function calculation, if crowding is judged to be congestion state greater than preset crowding threshold value; Otherwise, be judged to be unobstructed state;
As preferred a kind of scheme: said preset crowding threshold value comprises crowded threshold value and occlusion threshold, and said occlusion threshold is greater than said crowded threshold value, if crowding is judged to be unobstructed state smaller or equal to said crowded threshold value; If crowding is judged to be congestion state greater than said crowded threshold value and smaller or equal to said occlusion threshold; If crowding is judged to be blocked state greater than said occlusion threshold.
Second communication module sends to car-mounted terminal in order to the traffic behavior with each different highway sections.
Further; Said server also comprises: the optimal path planning module; Be used for reference position and destination locations according to vehicle; Distance and crowding to the highway section on the path are carried out weighted calculation; Note
is the length in certain i highway section of paths;
is i highway section crowding of certain paths; Note P is the weighted sum of all n road section length and crowding on the path, and computing formula is following:
Utilize above-mentioned formula that each paths between reference position and the destination locations is calculated, getting the minimum path of weighted sum is optimal path, and on said electronic communication map, shows said optimal path.
Beneficial effect of the present invention mainly shows: low-cost, practical, be easy to promote.
Description of drawings
Fig. 1 is based on the fundamental diagram of the magnitude of traffic flow and the road congestion detection system of GPS.
Fig. 2 is based on the process flow diagram of the magnitude of traffic flow and the road congestion detection system of GPS.
Fig. 3 is the exchanges data process flow diagram of car-mounted terminal and server.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1～Fig. 3, a kind of magnitude of traffic flow and road congestion detection system based on GPS, comprise in order to be installed on the monitor vehicle car-mounted terminal 3 and in order to information that receives car-mounted terminal and the server 1 that crowd calculating; Said car-mounted terminal 3 is connected with server 1 communication through cordless communication network 2, and said car-mounted terminal 3 comprises: the GPS module, in order to the reception gps satellite signal and calculate the coordinate information of current monitor vehicle; First communication module sends to server in order to the coordinate information with current monitor vehicle, and the data message of reception server; Display module in order to showing the electronic communication map, and according to latitude and longitude information, on said electronic communication map, and shows the congestion status of different roads with the position display of current monitor vehicle; Message processing module in order to the coordinate information data layout is reorganized, and adds the communication module address in the information of sending and control is sent;
Said server 1 comprises: the congestion status computing module, in order to coordinate information, obtain Real-time Traffic Information through the function that blocks up according to different car-mounted terminal passbacks, specific as follows:
The time interval of GPS sampling is t; With 4t is an analystal section;
is initial time; At
4 GPS sampling instants are arranged afterwards, be respectively
constantly;
From t
0To t
4Analystal section among, the set M that is arranged in the vehicle between monitoring section is calculated in each GPS sampling instant, be designated as M respectively
0, M
1, M
2, M
3, M
4
With following method set of computations A
0, A
1, A
2,A
3, A
4:
The formula of crowded function is following:
Wherein, C representes crowding, and N representes number of track-lines, card (A
i) the expression set A
iThe number of middle element;
Adopt the crowding in crowded each different highway sections of function calculation, if crowding is judged to be congestion state greater than preset crowding threshold value; Otherwise, be judged to be unobstructed state;
Said preset crowding threshold value comprises crowded threshold value and occlusion threshold, and said occlusion threshold is greater than said crowded threshold value, if crowding is judged to be unobstructed state smaller or equal to said crowded threshold value; If crowding is judged to be congestion state greater than said crowded threshold value and smaller or equal to said occlusion threshold; If crowding is judged to be blocked state greater than said occlusion threshold.
Second communication module sends to car-mounted terminal in order to the traffic behavior with each different highway sections.
Said server also comprises: the optimal path planning module; Be used for reference position and destination locations according to vehicle; Distance and crowding to the highway section on the path are carried out weighted calculation; Note
is the length in certain i highway section of paths;
is i highway section crowding of certain paths; Note P is the weighted sum of all n road section length and crowding on the path, and computing formula is following:
Utilize above-mentioned formula that each paths between reference position and the destination locations is calculated, getting the minimum path of weighted sum is optimal path, and on said electronic communication map, shows said optimal path.
Native system comprises the terminal (can be the mobile phone that has the GPS module) that is installed on the automobile, server end, and a kind of method that traffic flow information dynamically is provided.Like Fig. 1, wherein the automobile terminal mainly comprises this several modules: GPS module, communication module, display module and message processing module.
Below be the function of each module:
The GPS module mainly is responsible for receiving resolving the signal that some gps satellites send, and calculates current coordinate information through certain rule, represent with longitude and latitude, and the subsidiary time.
Communication module mainly is responsible for the transmission with data, and to the reception of server info.Owing in system, can have a large amount of vehicles,, carry out information of vehicles through the mode that the hardware address of communication module is encoded and distinguish in order to distinguish the information of each vehicle.
Display module is responsible for showing the electronic communication map, and is responsible for according to latitude and longitude information the vehicle current location being presented in the electronic chart, also will demonstrate the congestion situation of different roads simultaneously with the method that makes things convenient for readability to the driver.
Message processing module mainly is responsible for the gps data form is reorganized, and the communication module address is added among the information that will send, again these information is mail to server through communication module.
Server end then stores highway traffic system information (comprising latitude and longitude information); The information such as coordinate that can utilize different automobile terminals to transmit; According to calculating someway; Thereby draw the congested conditions of each bar highway, and as required, send road crowded state information to specific and whole car-mounted terminals.Server also has the server end electronic chart in addition, can intuitively see the residing particular location of designated vehicle.
Because in the present invention, adopt wireless communication module and server communication, the hardware address of communication module or SIM card number can guarantee uniqueness.Receive that with this district office information belongs to different vehicles at server end.
The method that traffic flow information dynamically is provided then is a positional information of utilizing the automobile terminal to transmit, obtains required Real-time Traffic Information through following crowded function.
Crowded function: the highway speed limit is
(KM/h); The GPS sampling time interval is t (s), and number of track-lines is N.For the highway section of required analysis, obtain long L (s) between monitoring section in order to following method.
, unit are rice.
With 4t is an analystal section.
is initial time, at
4 GPS sampling instants arranged afterwards.Be respectively
constantly.
From t
0To t
4Analystal section among, the set M in that each GPS sampling instant system all will obtain being arranged in the vehicle between monitoring section is designated as M respectively
0, M
1, M
2, M
3, M
4
With following method set of computations A
0A
1A
2A
3A
4(because retrained by actual conditions, certain vehicle leaves after the sampling interval, just can not get into sampling interval again.）
The formula of crowded function C is following
Card (A
i) the expression set A
iThe number of middle element.
Key element mainly is set, and L is set at the speed of a motor vehicle under 80% speed limit condition, just leaves the monitored area through 3t at most.
The C value that calculates is when being tending towards increasing, and the vehicle degree of crowding improves, otherwise the degree of crowding reduces.
Arbitrary vehicle only possibly appear among the continuous set of following footnote of set M.For example vehicle belongs to M
1, M
2, M
3Be fine, but M can not occur belonging to respectively
1, M
2, M
4Such situation.
The main performing step of the detection system of present embodiment is following:
(1) preparation before the Traffic monitoring service;
(2) server obtains each terminal data, obtains traffic flow information after the processing;
(3) traffic flow information sent of terminal reception server, and show.
Step (1): mainly be to carry out the preceding preliminary work of two ends exchanges data, in this step, eventually
The information that end sends is inquiry message, comprises the hardware address information at terminal; The information that server sends is confirmation, wherein comprises the temporal information of server.
Like Fig. 2 and Fig. 3, after server is opened, be written into the highway traffic system information of being stored immediately, wait for that then each automobile terminal sends apply for information.After receiving apply for information, server replys confirmation for each terminal according to the terminal hardware address information that obtains.On the other hand, inquiry message is at first sent to server end in the terminal after startup, and the normal operation of server end just can be confirmed in the terminal after receiving the affirmation message of server.Time synchronized is carried out according to confirmation in the terminal.
Described step (2) comprising:
1. like Fig. 3, after time synchronized finished, vehicle termination was with designated time intervals, and with GPS information, the identifying information of temporal information and vehicle coding mails to server through wireless mode later.The traffic flow information that server is sent is not stopped to accept in the terminal simultaneously.If vehicle termination (as 5 seconds) is not within a certain period of time received the traffic flow information that server end is sent, inquire with regard to sending inquiry message to server end again, so do not stop circulation, until the affirmation information of receiving that server end is sent.
2. after service end was received the information of sending at each terminal, the congestion status computing module divided into groups according to the difference in place street to each terminal, then each group was parsed the magnitude of traffic flow in each highway section according to crowded function mentioned above.Send to each terminal of vehicle after again each bar road traffic flow information being gathered coding.
Wherein to crowded can defining flexibly in various degree.If be divided into three kinds of different extent to traffic: unobstructed, crowded, obstruction can define two threshold value a and b so.If the c that is drawn by crowded function is less than a, it is unobstructed can defining the street so.In like manner, if c between a, b, defines the street for crowded; Greater than b, then for stopping up.
Described step (3) comprising:
1. the traffic flow information processing enter is obtained the traffic flow breath that transmits from server, and analyzes, and confirms the magnitude of traffic flow situation in each highway section;
2. the terminal is shown in the congestion situation in each highway section in the electronic communication distribution plan;
Demonstration to the magnitude of traffic flow situation in each highway section can have different modes.If each street
Traffic conditions be divided into unobstructed, crowded, stop up three kinds of different extent, can use the white representative unobstructed so, yellow representative is crowded, red representative is stopped up, and carries out painted to the street on the electronic communication figure.Like this, the driver has just had very the traffic conditions in each highway section and has got information about.
Further; Can also utilize magnitude of traffic flow situation and optimal path planning module at server end and vehicle termination; Reference position and destination locations according to vehicle plan that to the path optimal path for the driver finds driving lets the driver obtain the most comfortable driving and experiences.
Can find out by technique scheme; Application of the present invention can make vehicle supervision department can understand the traffic flow conditions in each highway section real-time and accurately; And can the magnitude of traffic flow situation in each highway section of being grasped be sent in real time to the user who needs, for user's trip brought greatly convenient.The present invention also can effectively regulate the vehicle flow in each highway section, makes the traffic in each highway section more smooth and easy.Simultaneously, the function of client of the present invention is simple, can solve the cost problem that detects the magnitude of traffic flow just based on the mobile phone that has the GPS module.
Claims (2)
1. one kind based on the magnitude of traffic flow of GPS and the crowded detection system of road; It is characterized in that: said detection system comprise in order to be installed on the monitor vehicle car-mounted terminal and in order to information that receives car-mounted terminal and the server that crowd and calculates, said car-mounted terminal passes through cordless communication network and is connected with server communication; Said car-mounted terminal comprises:
The GPS module is in order to receive gps satellite signal and to calculate the coordinate information of current monitor vehicle;
First communication module sends to server in order to the coordinate information with current monitor vehicle, and the data message of reception server;
Display module in order to showing the electronic communication map, and according to latitude and longitude information, on said electronic communication map, and shows the congestion state of different roads with the position display of current monitor vehicle; Message processing module in order to the coordinate information data layout is reorganized, and adds the communication module address in the information of sending and control is sent;
Said server comprises:
The congestion state computing module in order to the coordinate information according to different car-mounted terminal passbacks, obtains Real-time Traffic Information through crowded function, and is specific as follows:
The time interval of GPS sampling is t, is an analystal section with 4t, t
0Be initial time, at t
04 GPS sampling instants are arranged afterwards, be respectively t
1, t
2, t
3, t
4Constantly;
Among the analystal section from t0 to t4, the set M that is arranged in the vehicle between monitoring section is calculated in each GPS sampling instant, be designated as M0 respectively, M1, M2, M3, M4;
With following method set of computations A
1, A
2, A
3, A
4:
∪ in the above-mentioned formula, ∩ ,-all be the set operation operation, wherein ∪ is for getting the union operational symbol, and ∩ is for getting the intersection operation symbol ,-be to gather to subtract operational symbol;
The formula of crowded function is following:
Wherein, C representes crowding, and N representes number of track-lines, card (A
i) the expression set A
iThe number of middle element;
Adopt the crowding in crowded each different highway sections of function calculation, if crowding is judged to be congestion state greater than preset crowding threshold value; Otherwise, be judged to be unobstructed state; Second communication module is used for the traffic behavior in each different highway sections is sent to car-mounted terminal.
2. the magnitude of traffic flow and the crowded detection system of road based on GPS as claimed in claim 1, it is characterized in that: said server also comprises:
Best circuit planning module in order to reference position and the destination locations according to vehicle, is carried out weighted calculation to the length and the crowding in the highway section on the path, note L
iBe the length in certain i highway section of paths, C
iBe the crowding in certain i highway section of paths, note P is the weighted sum of all n road section length and crowding on the path, and computing formula is following:
Utilize above-mentioned formula that each paths between reference position and the destination locations is calculated, getting the minimum path of weighted sum is optimal path, and on said electronic communication map, shows said optimal path.
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|---|---|---|---|
| CN2010102904089A CN101958052B (en) | 2010-09-25 | 2010-09-25 | GPS (Global Position System) based traffic flow and road jamming detection system |
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|---|---|---|---|
| CN2010102904089A CN101958052B (en) | 2010-09-25 | 2010-09-25 | GPS (Global Position System) based traffic flow and road jamming detection system |
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| CN101958052B true CN101958052B (en) | 2012-05-23 |
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| CN102176284B (en) * | 2011-01-27 | 2014-04-30 | 深圳市美赛达科技股份有限公司 | System and method for analyzing and determining real-time road condition information based on global positioning system (GPS) terminal |
| CN102800206A (en) * | 2011-05-22 | 2012-11-28 | 方文淋 | Road vehicle information long-distance perception system |
| TW201322200A (en) * | 2011-11-23 | 2013-06-01 | Chunghwa Telecom Co Ltd | System and method of using probe vehicle as vehicle detector |
| CN102663895A (en) * | 2012-05-28 | 2012-09-12 | 上海海事大学 | Container truck jamming prompting system and realizing method thereof for container terminals |
| CN102930738A (en) * | 2012-10-25 | 2013-02-13 | 北京交通大学 | Vehicle positioning and traffic flow detection system and method |
| CN103000039B (en) * | 2012-11-26 | 2014-12-03 | 余姚德诚科技咨询有限公司 | Road condition crowding suggesting device |
| CN103886738A (en) * | 2012-12-19 | 2014-06-25 | 黑龙江诠维地理信息有限公司 | Mobile interment-based road traffic real-time road condition information analyzing and determination method |
| CN104080041A (en) * | 2013-03-27 | 2014-10-01 | 百度在线网络技术（北京）有限公司 | Method for detecting area crowdedness degree and locating server |
| CN103646541B (en) * | 2013-12-16 | 2017-05-24 | 电子科技大学 | Vehicle congestion degree acquiring method based on Hadoop |
| CN105277202A (en) * | 2014-06-24 | 2016-01-27 | 上海市闵行第二中学 | Vehicle path planning method and system |
| CN104217602B (en) * | 2014-09-16 | 2016-03-09 | 安徽达尔智能控制系统有限公司 | A kind of taxi self-service query system exchanged based on small echo |
| WO2016202012A1 (en) * | 2015-06-17 | 2016-12-22 | 苏州大学张家港工业技术研究院 | Traffic information detection method, acquiring method and acquiring apparatus based on traffic monitoring video |
| CN105357715A (en) * | 2015-10-10 | 2016-02-24 | 河北工程大学 | Intelligent vehicular terminal for realizing congestion control of internet of vehicles |
| DE102016205434A1 (en) * | 2015-11-25 | 2017-06-01 | Volkswagen Aktiengesellschaft | Method and system for creating a lane-accurate occupancy map for lanes |
| CN106056908A (en) * | 2016-06-28 | 2016-10-26 | 联想(北京)有限公司 | Information processing method and server |
| CN106297277A (en) * | 2016-10-21 | 2017-01-04 | 合肥哦走信息技术有限公司 | A kind of based on intelligent terminal's positioning intelligent transportation system |
| CN106781507A (en) * | 2017-02-22 | 2017-05-31 | 百度在线网络技术（北京）有限公司 | Method and apparatus for generating traffic information and test road conditions identifying system |
| CN108417067B (en) * | 2018-05-11 | 2020-12-29 | 安徽新华学院 | Road water conservancy diversion push system based on thing networking |
| CN110659549B (en) * | 2018-06-29 | 2023-01-13 | 华为技术有限公司 | Method and device for notifying congestion degree of train |
| CN111815944B (en) * | 2019-04-11 | 2022-08-02 | 阿里巴巴集团控股有限公司 | Data validity detection method and device, electronic equipment and computer storage medium |
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| JP4270922B2 (en) * | 2003-03-28 | 2009-06-03 | 三菱電機株式会社 | Mobile communication device, traffic jam information generation device, mobile communication method of mobile communication device, traffic jam information generation transmission method of traffic jam information generation device, and |
| JP2007278766A (en) * | 2006-04-04 | 2007-10-25 | Xanavi Informatics Corp | On-board navigation device |
| JP4360419B2 (en) * | 2007-04-26 | 2009-11-11 | アイシン・エィ・ダブリュ株式会社 | Traffic situation judgment system |
| CN101727747A (en) * | 2009-12-16 | 2010-06-09 | 南京信息工程大学 | Abnormal road jam alarming method based on flow detection |
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