CN103093630B - Speed measuring method for vehicles on expressway - Google Patents
Speed measuring method for vehicles on expressway Download PDFInfo
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- CN103093630B CN103093630B CN201310003853.6A CN201310003853A CN103093630B CN 103093630 B CN103093630 B CN 103093630B CN 201310003853 A CN201310003853 A CN 201310003853A CN 103093630 B CN103093630 B CN 103093630B
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Abstract
The invention discloses a speed measuring method for vehicles on an expressway and belongs to the field of mobile communication. The speed measuring method includes the steps of recognizing users of the expressway through signaling at an A intersection of a global system for mobile communication (GSM) network covering the expressway, building a changing-over strip of the expressway according to call records of the users of the expressway, and carrying out speed measurement according to the position of the changing-over strip of the expressway and the changing-over time of the users of the expressway. Through real-time data acquisition and processing, the speed measuring method improves real-time processing capacity and accuracy. Moreover, due to the fact that the speed measuring method carries out analysis based on signaling of signals of mobile phones, the speed measuring method does not need novel equipment. Just people using the mobile phones all can carry out locating, so investment of the equipment is reduced. The mobile phones of the users just can maintain a starting state, and then the speed measuring method can carry out speed measurement through the signaling at the A intersection. Calculation of speed measurement process is carried out through a system according to the signaling at the A intersection, but not through mobile phone terminals of the users. Therefore, the speed measuring method for the vehicles on the expressway has measuring stability.
Description
Technical field
The present invention relates to moving communicating field, particularly a kind of speed-measuring method of super expressway vehicle.
Background technology
Along with the fast development of expressway construction, and the implementation that in the recent period highway red-letter day is free, vehicle on expressway increases day by day, also the difficulty directly causing super expressway user velocity to detect continues to increase, only just regulatory requirements cannot be met with manpower limited at present, in the urgent need to efficient automatically-monitored means.
Existing vehicle speed measuring technological means is mainly as follows:
1, coil type tests the speed: under road surface, be embedded with two groups of inductive coils, and when vehicle passes through, the distance of user's two groups of coils, divided by the mistiming detected, just obtains the speed of a motor vehicle.
2, radar velocity measurement (microwave type tests the speed): the speed being measured moving object by microwave, its work theory is based on Doppler's principle, namely when microwave irradiation to motion object on time, can produce one becomes one of ratio to change with moving object speed, and its change size is proportional to the speed of object of which movement.
3, based on the vehicle speed measuring system of video: passing through set up road surface coordinate system can compare accurate location to the position of vehicle in each two field picture, and the frame frequency in conjunction with video image just can obtain the speed of a motor vehicle.
But there is following shortcoming in above-mentioned vehicle speed measuring means:
1, equipment and input aspect: need to be equipped with the equipment such as special GPS terminal, transmission network and monitor supervision platform, its service time of battery is short, and not plug-in source uses continuously generally only has 40 minutes to 1.5 hours; Location is inaccurate, and GPS normal plane positioning error is in 10-30 rice; The impact being subject to the factors such as weather is comparatively large, causes can not searching star or search star very slow.Further, highway circuit is very long, if realize covering comprehensively, the equipment investment of needs is very huge.
2, accuracy aspect: radar normally will play speed measuring function, it must path same as tested vehicle, if there is certain angle in the position that radar is put and vehicle running path, causing can not keeping parallelism always with vehicle route, the speed that then radar detects will be slower than actual speed, and the speed measured is the actual speed projection in the X direction of vehicle; Radar velocity measurement is vulnerable to the restriction of physical environment aspect, and some larger objects on road, as buildings, billboard etc., all can have influence on the accuracy of radar velocity measurement; Based on the metering system of sampling, owing to being subject to hits quantitative limitation, accuracy is also difficult to improve; There is shadow effect, when using way of patrol to measure, if cruiser and target carriage are apart from very near, the microwave reflection intensity of the target vehicle travelled in the same way can replace the microwave of ground return, and make radar be difficult to accurately identify the patrol speed of a motor vehicle, now, the patrol speed of a motor vehicle is likely lost, and causes measuring error.
3, real-time aspect: the result that tests the speed of the existing means that test the speed informs car owner by the mode of penalty note after speeding, cause car owner just can know afterwards, can not car owner be reminded at that time to exceed the speed limit, thus adjust the speed of a motor vehicle in time, good effect was not had for overspeed warning, accident prevention.
4, stability aspect: based on the vehicle speed measuring system of video, although can in most of the cases effectively identify and follow the tracks of vehicle, but vehicle is more or when having a traffic congestion phenomenon, the vehicle target large area in foreground image is sticked together, for monitoring adds difficulty on road; Meanwhile, on real road, situation is complicated, the acute variation etc. that such as strong wind causes camera mechanical shaking, lightning causes light, has situation about much cannot estimate to occur, and may cause system within a certain period of time cannot steady operation.
Summary of the invention
For the defect existed in prior art, the object of this invention is to provide a kind of speed-measuring method of super expressway vehicle, for realizing efficient measurement and the early warning of the super expressway speed of a motor vehicle.
For reaching above object, the technical solution used in the present invention is:
A speed-measuring method for super expressway vehicle, comprises the following steps:
By the user of the GSM network A message identification super expressway to covering super expressway, message registration based on super expressway user is set up super expressway and is switched band, tests the speed according to the time that position and the super expressway user of described super expressway switching band switch.
The invention provides a kind of speed measurement method of the super expressway vehicle based on A message data, by real-time, parsing association is carried out to the signaling of the GSM network covering super expressway, form the record for each user's communication; By the identification of user's communication recording feature, find out the user advanced on super expressway, thus utilize the judgement of these users realization to this user's travel speed on super expressway.Owing to being timely collection data, improve processing capability in real time and accuracy; In addition, because the method is the signalling analysis based on mobile phone signal, thus not need to introduce new equipment, as long as use the people of mobile phone to position, reduce equipment investment; As long as user is in open state, just can be undertaken testing the speed to it by A message, measuring process is calculated according to A message by system, instead of carries out the calculating of user's speed of a motor vehicle at mobile phone terminal, thus has the stability of measurement.
Accompanying drawing explanation
The speed-measuring method process flow diagram of the super expressway vehicle that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 be in the embodiment of the present invention user at the switch instances schematic diagram of different districts.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiments provide a kind of speed measurement method of the super expressway vehicle based on A message data, by real-time, parsing association is carried out to the signaling of the GSM network covering super expressway, form the record for each user's communication; By the identification of user's communication recording feature, find out the user advanced on super expressway, thus utilize the judgement of these users realization to this user's travel speed on super expressway.Owing to being timely collection data, improve processing capability in real time and accuracy; In addition, because the method is the signalling analysis based on mobile phone signal, thus not need to introduce new equipment, as long as use the people of mobile phone to position, reduce equipment investment; As long as user is in open state, just can be undertaken testing the speed to it by A message, measuring process is calculated according to A message by system, instead of carries out the calculating of user's speed of a motor vehicle at mobile phone terminal, thus has the stability of measurement.
As shown in Figure 1, present embodiments provide a kind of speed-measuring method of super expressway vehicle, comprising:
The user of step 101, identification super expressway.By associating with parsing the collection of the GSM network A message covering highway, form the CDR(message registration of recording user call); Judge according to take cell list, switching times and transfer sequence in user's communication process, find out the user advanced at highway, determination methods is: switch more than 3 times and converse and take community more than 70% for covering super expressway community, and switching the sequence taking community needs according to direct of travel.According to which, the call of super expressway user can be identified from the CDR of all calls, and cell list and switching time (switching time is the information comprised in the measurement report obtained from A message, directly can analyze from signaling information and obtain) that super expressway user's communication takies can be found out.
Step 102, to set up super expressway based on the message registration of super expressway user and switch band.In the GSM network covering super expressway, because the overlapping coverage of network is low, on super expressway, the call of any one position takies specific one community substantially, and user super expressway enterprising work words time, (switching refers to that mobile phone is transformed into another one Serving cell from a Serving cell to the level intensity of another one community to take the signal dropout of community when generally can be and advance a position, so the signal dropout of current service cell to a certain extent time, the requirement of communication cannot be met, or when adjacent cell can provide better serve time, then will switch, mobile phone is switched to the better adjacent cell of service quality), thus meet switching condition.User can carry out the switching of community to community in specific position, will form the switching band of community to community so on a highway.The present embodiment forms switching band according to community on highway to cell merge relation (comprising this handoff relation information in measurement report), and can measure the distance switched between band.Switch the boundary be with and referred in Liang Ge community, mobile phone can carry out the region switched.In the present embodiment, only need calculating user that the distance of passing by between twice switching occurs.And temporal information comprised in measurement report, the distance between different districts, also can be obtained by the distributed intelligence of base station.
The time that step 103, the position switching band according to super expressway and super expressway user switch tests the speed.Switching from the handover Performed(GSM network A message) signaling extracts switching time, and to find out on identical driving path the different user of (two switch between band), according to their switching time, just can judge travel speed.
Concrete grammar comprises:
Step 1031, from GSM network A message, extract the time point that super expressway user switches;
Step 1032, calculate the Shi Jian Cha ⊿ t of adjacent twice switching;
Step 1033, to obtain described adjacent twice switching cover distance L on super expressway according to the distributed intelligence of base station, then the travel speed of user is
Step 1034, set the speed of user 1 as v
1, adjacent twice switching difference be Δ t
1, the speed of user 2 is v
2, adjacent twice switching mistiming be Δ t
2, the distance that they run over is identical, then have
Calculated the running time of super expressway user by above-mentioned steps, and calculate the proportionate relationship of speed between different user.Passing ratio calculates the proportionate relationship of the speed of different user, with the speed v 1 of user 1 for benchmark, just can extrapolate the speed of other users.
In sum, this gives a kind of highspeed user's of utilization A message to judge the method for user velocity.As long as due to user's start, just have the propagation of signaling between mobile phone and base station, thus just can judge user velocity according to signaling, do not need extra increase hardware burden; Simultaneously because switching time is accurate, this invention more accurately and easily can judge the speed of user.
In a concrete application example, the concrete switching time of 8 users is as shown in the table:
Table 1
User in table 1 is shown at the switch instances image of different districts, the switch law of highspeed user can be found out more intuitively.As shown in Figure 2, lines different in figure represent different users, and circle represents different communities, ellipse represents the distance between different districts, numeral inside arrow, represent a certain user from cell merge time used to next community, chronomere is second.
As can be seen from Figure 2, the travel speed comparatively rule of user 1 and user 4, four segment distances from community 39031 to community 29584, the time scale of user 1 on every segment distance is close with user 4, and user 2 and user 3 are significantly less than other users switching time, the speed of user 2 and user 3 thus can be thought.In figure, user 8 is 4s switching time first time when just entering community, far below other users, temporarily think that his Shi Cong community is middle or the place's of keeping to the side switching, thus the time is very short, when calculating user's travel speed, because this time is too short, not regular event, thus do not use the switching time data of user 3 from 39031 to 30242 this section of distances.
Detailed analysis is carried out to above data below, if:
T
1, t
2, t
3..., t
8be respectively user 1-user 8 and carry out the cell merge time used, unit is second (s);
V
1, v
2, v
3..., v
8be respectively the speed that each user travels on expressway.
Analyze the speed of each user of contrast below stage by stage:
For user 2, on path 39031 ~ 30242 ~ 19584:
t
2=11+5=16
And for user 1, be on 39031 ~ 30242 ~ 18937 ~ 19584 in path:
t
1=22+10+6=38
Thus have:
For user 1, on path 39031 ~ 30242 ~ 18937 ~ 19584 ~ 29584:
t
1=22+10+6+4=42
For user 4, on path 39031 ~ 30242 ~ 18937 ~ 19584 ~ 29584:
t
4=18+9+5+4=36
For user 3: on path 39031 ~ 20242 ~ 19584 ~ 29584:
t
3=7+7+5=19
Thus have:
Thus have:
For user 5: on path 39031 ~ 30242:
t
1=22
t
5=19
Thus have:
For user 6: on path 39031 ~ 18937 ~ 19584:
t
6=18+6=24
For user 1: on path 39031 ~ 30242 ~ 18937 ~ 19584:
t
1=22+10+6=38
Thus have:
For user 7, on path 19551 ~ 39031:
t
7=25
t
2=12
Thus have:
For user 8, on path 39031 ~ 30242 ~ 18937 ~ 19584 ~ 29584:
t
8=4+10+6+4=24
t
1=22+10+6+4=42
Thus have:
Due in each section of distance, user is not linear uniform motion strictly speaking, and thus the speed of each section of distance is also different.In order to simplify calculating, by the derivation of equation, can be similar to and draw the following conclusions:
V
1=v
1(suppose that v1 is a benchmark, speed and it of other users have certain proportionate relationship)
v
2=2.38v
1
v
3=2.21v
1
v
4=1.17v
1
v
5=1.16v
1
v
6=1.58v
1
v
7＝1.14v
1
v
8=1.75v
1
According to the above analysis, the velocity magnitude sequence of each highspeed user is as follows:
v
2>v
3>v
8>v
6>v
4>v
5>v
7>v
1
Method of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws and other embodiment belongs to technological innovation scope of the present invention equally.
Claims (3)
1. a speed-measuring method for super expressway vehicle, is characterized in that, comprises the following steps:
By the user of the GSM network A message identification super expressway to covering super expressway, message registration based on super expressway user is set up super expressway and is switched band, tests the speed according to the time that position and the super expressway user of described super expressway switching band switch;
Wherein, the method that the time switched according to position and the super expressway user of super expressway switching band tests the speed specifically comprises:
According to the Shi Jian Cha ⊿ t of adjacent twice switching of this user of Time Calculation that described super expressway user switches;
Described adjacent twice switching of distributed intelligence acquisition of the cell list taken according to described super expressway user's communication and base station covers the distance L on super expressway;
Then the travel speed of this user is:
Described method also comprises
If the travel speed of a user is v
1, adjacent twice switching mistiming be Δ t
1, the speed of another user is v
2, adjacent twice switching mistiming be Δ t
2, the distance that two users run over is identical, then have
Calculate the running time of super expressway user, and calculate the proportionate relationship of speed between different user.
2. the speed-measuring method of super expressway vehicle according to claim 1, is characterized in that, the method for the user of described identification super expressway specifically comprises:
More than three times, switching cell in communication process, and call takies community more than 70% for covering super expressway community, is the user advanced at super expressway; Wherein, the sequence of switching cell should according to direct of travel;
From the message registration of all calls, identify the call of super expressway user, and find out cell list and switching time that super expressway user's communication takies.
3. the speed-measuring method of super expressway vehicle according to claim 2, is characterized in that, the described method setting up super expressway switching band specifically comprises:
User super expressway enterprising work words time, advance a position time take the signal dropout of community to the level intensity of another one community, then this position for switch band.
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| JPH11127469A (en) * | 1997-10-22 | 1999-05-11 | Nec Corp | Mobile communication system and communication method for the same and storage medium for recording control program for the same |
| IL150894A0 (en) * | 2002-07-24 | 2003-04-10 | A method for measuring road traffic load based on analyzing cellular communications | |
| JP5176961B2 (en) * | 2006-09-25 | 2013-04-03 | 日本電気株式会社 | Mobile communication terminal and its moving speed detection method |
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Application publication date: 20130508 Assignee: Hubei Dongtu Taiyi Wisdom Technology Co., Ltd. Assignor: Beijing Tuoming Communication Technology Co., Ltd. Contract record no.: 2019990000262 Denomination of invention: Speed measuring method for vehicles on expressway Granted publication date: 20150107 License type: Common License Record date: 20190801 |