CN104091450B - A kind of video frequency velometer and video frequency speed-measuring method - Google Patents
A kind of video frequency velometer and video frequency speed-measuring method Download PDFInfo
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- CN104091450B CN104091450B CN201410208606.4A CN201410208606A CN104091450B CN 104091450 B CN104091450 B CN 104091450B CN 201410208606 A CN201410208606 A CN 201410208606A CN 104091450 B CN104091450 B CN 104091450B
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Abstract
The present invention provides video frequency velometer and video frequency speed-measuring method.The video frequency velometer is installed on the support of road edge, and the video frequency velometer is separate combination type or integration-in-one in form.For the former, video camera connects the computer equipment that the view data for being used for gathering outside video camera according to it carries out speed calculating to target vehicle by data line；For the latter, video camera and computing module are embedded and integrated, and are directly realized by the output, storage, and/or upload of the result that tests the speed and test the speed.A protective cover is provided with the support; the protective cover is with least one opening; described video frequency velometer then includes at least one video camera; the video camera includes graphics processing unit and at least one camera lens, and at least one described camera lens can gather the image of the vehicle running state of both direction on the road.The present invention realizes that the travel speed of the vehicle to being run on road is detected by way of synchronously carrying out IMAQ to the different directions of road.
Description
Technical field
The present invention relates to electronic device field, and in particular to a kind of video frequency velometer and video frequency speed-measuring method.
Background technology
In field of traffic, in order to ensure road driving safety, it usually needs carry out traveling speed to the vehicle travelled on road
Degree detection.Generally there are detections of radar, coil-induced detection to the mode that the vehicle in traveling carries out velocity measuring in the prior art
And video image acquisition detection several ways.Wherein detections of radar is to encounter vehicle by launching radar wave and receiving radar wave
Back wave afterwards, afterwards by way of both time differences, calculates the travel speed of vehicle；Environment Coil Detector is to pass through
The pre-plugged ground induction coil on road, when vehicle is by the coil, inductance value caused by vehicle body cutting magnetic line
Change, afterwards, according to known coil spacing distance, the traveling speed of the time difference measurements vehicle of adjacent windings is rolled by vehicle
Degree.This kind of test mode may refer to Fig. 1.The third is common video frequency speed-measuring mode, is to be installed on road towards one
The video camera in direction, carries out IMAQ, afterwards by tracking vehicle shadow in video image by video camera to the vehicle of traveling
As the distance of the displacement time in video image in presumptive area, and presumptive area, with reference to video calibration technique, according to away from
From divided by the time be equal to speed principle carry out car speed calculating.
Existing video frequency speed-measuring is the traveling process that vehicle is analyzed by the analysis to haplopia domain continuous videos image, is led to
Cross analysis vehicle location and traveling time calculates speed.It has the disadvantage to the requirement of video camera setting height(from bottom), position and shooting angle
It is higher, also, because the visual range of single direction video camera is smaller therefore shorter to vehicle tracking judging distance, cause pair
There is larger error in the accurate discriminating of mobile vehicle particular location, and error can increase as speed is improved.
The content of the invention
It is an object of the invention to provide a kind of video frequency velometer and video frequency speed-measuring method, to pass through the different directions to road
The mode of IMAQ is carried out simultaneously, realizes that the travel speed of the vehicle to being run on road is detected.
In a first aspect, the invention provides a kind of video frequency velometer, being installed on the support of road edge, the video is surveyed
Fast instrument includes video camera and computer equipment, and the video camera and computer equipment are separate in physical state, described to take the photograph
Camera connects the computer equipment by data line, and the computer equipment is used for the figure according to the camera acquisition
Picture data carry out being provided with a protective cover on speed calculating, the support to target vehicle, and the protective cover is open with least one,
Characterized in that, described video frequency velometer includes at least one video camera, the video camera is including graphics processing unit and at least
One camera lens, at least one described camera lens can gather the image of the vehicle running state of both direction on the road.
It is noted that in the video measurement instrument of above-mentioned first aspect, " video camera and computer equipment are in physics shape
It is separate in state " implication refer to：Although the video camera and computer equipment belong to the video measurement instrument, but
It is outside apparently both be presented as two independent parts, only can be provided with communication link to carry out between both
Communication.Described communication link can be wireless or wired, be not specially limited herein.
It is noted that the computer equipment, refers to that those have the equipment of calculating, storage and/or upload function,
Computing device, computing element, computing module, or other titles are properly termed as, are not specially limited herein.
According to the video frequency velometer described in present pre-ferred embodiments, wherein, the protective cover has the first opening and the
Two openings, first opening and the second opening are respectively facing road both direction.
According to the video frequency velometer described in present pre-ferred embodiments, wherein, the protective cover is vertically arranged, the protective cover
Inside it is provided between two speculums, two speculums in setting angle, two speculums are open and described respectively for described first
Second opening, the position for video camera is in the bottom of the protective cover, and the video camera includes a camera lens, and the camera lens is towards upper
Side, the projection of two speculum covers the camera lens, to enable the camera lens while gathering two speculums
Interior image.
According to the video frequency velometer described in present pre-ferred embodiments, wherein, the video camera includes a camera lens, described
Protective cover is obliquely installed, and first opening and the second opening are located at two adjacent sides of the protective cover respectively, described
First opening positioned at the protective cover left surface, the left surface towards a direction of the road, the camera lens towards
First opening；
It is described second opening positioned at the protective cover downside, the downside towards the road other direction,
It is provided with a speculum in the protective cover, the speculum is located at the camera lens towards on the direction of the described first opening,
Towards the camera lens, with the described second opening in setting angle, to enable the camera lens while gathering first opening
With the image in the described second opening visual field.
According to the video frequency velometer described in present pre-ferred embodiments, wherein, the video camera includes two synchronous mirrors
Head, described two camera lenses are respectively for the described first opening and the described second opening.
According to the video frequency velometer described in present pre-ferred embodiments, wherein, two shootings are provided with the protective cover
Machine, described two video cameras are respectively comprising a camera lens, and the camera lens of each video camera is open and described respectively for described first
Second opening.
It is noted that the video frequency velometer is a kind of product, it is referred to as video frequency speed-measuring device, video frequency speed-measuring and sets
Standby, video frequency speed-measuring system etc., will not be described here.
In second aspect, the present invention provides another video frequency velometer, is installed on the support of road edge, the support
On be provided with a protective cover, the protective cover with least one opening, described video frequency velometer include at least one video camera and
Computing module, is integrated in together between the video camera and the computing module, the video camera and the computing module
Between there is built-in communication link, the video camera includes graphics processing unit and at least one camera lens, it is described at least one
Camera lens can gather the image of the vehicle running state of both direction on the road；The computing module is used to take the photograph according to
The view data of camera collection carries out speed calculating to target vehicle.
It is noted that the computing module, refers to that those have the equipment of calculating, storage and/or upload function, also may be used
To be referred to as computing device, computing element, computer equipment, or other titles, it is not specially limited herein.
Preferably, the protective cover has the first opening and the second opening, first opening and the second opening court respectively
To road both direction.
Preferably, wherein, the protective cover is vertically arranged, and is provided with two speculums in the protective cover, two speculums it
Between in setting angle, two speculums respectively for described first opening and described second opening, the position for video camera in it is described protect
The bottom of shield, the video camera includes camera lens, and upward, the projection of two speculum is by the mirror for the camera lens
Head covering, to enable the camera lens while gathering the image in two speculums.
Preferably, wherein, the video camera includes camera lens, and the protective cover is obliquely installed, described, and described first opens
Mouth and the second opening are located at two adjacent sides of the protective cover respectively, and first opening is located at a left side for the protective cover
Sideways, the left surface is towards a direction of the road, and the camera lens is open towards described first；The second opening position
In the downside of the protective cover, the downside is provided with one in the protective cover towards the other direction of the road
Speculum, the speculum be located at the camera lens towards described first opening direction on, towards the camera lens, with described second
Opening is in setting angle, to enable the camera lens while gathering the figure in first opening and the described second opening visual field
Picture.
Preferably, the video camera includes two synchronous camera lenses, and described two camera lenses are respectively for the described first opening
With the described second opening.
Preferably, two video cameras are provided with the protective cover, described two video cameras include a camera lens respectively, often
The camera lens of individual video camera is respectively for the described first opening and the described second opening.
The third aspect, the present invention provides a kind of video frequency speed-measuring method, and methods described includes：With such as first aspect or second
The image of the driving state of target vehicle of both direction, is surveyed according to the video on video frequency velometer collection road described in aspect
The view data of fast instrument collection carries out speed calculating to target vehicle, and the calculating is the position and row by the target vehicle
Enter the time to carry out.
Preferably, the calculating uses below equation：When displacement/generation displacement of speed=target vehicle is corresponding
Between.That is, speed can be obtained with the displacement divided by the corresponding traveling time of the generation displacement of target vehicle.
Preferably, the identification of the target vehicle is carried out according to car plate.
Technical characteristic as a result of more than so that the present invention has the following advantages and accumulated compared to prior art
Pole effect：
The present invention, which is provided with, to gather the video camera of the image of vehicle running state in road both direction simultaneously, and is led to
Cross cable transmission and give computer (or embedded computing module), marked by computer (or embedded computing module) according to car plate etc.
The traveling image of same vehicle is recognized, time difference and operating range of the same vehicle on road between appearance twice is judged, and
The travel speed of vehicle is judged accordingly, so as to calculate the accurate travel speed of vehicle.
Brief description of the drawings
Fig. 1 is the video frequency speed-measuring schematic diagram of prior art；
A kind of a kind of structural representation of the embodiment for video frequency velometer that Fig. 2 provides for the present invention；
Fig. 3 is the installment state figure of embodiment illustrated in fig. 2；
A kind of structural representation of another embodiment for video frequency velometer that Fig. 4 provides for the present invention；
A kind of structural representation of another embodiment of video frequency velometer that Fig. 5 provides for the present invention；
A kind of structural representation of the another embodiment for video frequency velometer that Fig. 6 provides for the present invention；
Fig. 7 is the video measurement method schematic diagram of the embodiment of the present invention.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
The invention provides a kind of video frequency velometer, this kind of video frequency velometer can be installed in the support of road edge
On, camera/high-definition camera in the video frequency velometer transmits line by external data and connected in the video measurement instrument
Computer equipment, the computer equipment is used for the view data gathered according to the camera/high-definition camera to target
The calculating of vehicle progress speed (or a kind of video camera and the embedded integral intelligent video camera of computing module are used, it is directly real
The result that now tests the speed and test the speed output, storage, upload), a protective cover is provided with the support, and video frequency velometer is placed in protective cover
Interior, the protective cover has at least one opening, and the video frequency velometer includes at least one video camera, and the video camera includes figure
As processing unit and at least one camera lens, at least one described camera lens can gather the vehicle traveling of both direction on the road
The image of state.
It is preferred that, the protective cover has the first opening and the second opening, first opening and the second opening court respectively
To road both direction.
Fig. 2 is a kind of structural representation of the embodiment for the video frequency velometer that the present invention is provided, as shown in Fig. 2 in this hair
In bright, protective cover 10 can be the structure of tubular, and its material can be made of timber, plastics or metal, for protecting shooting
Cable can be set in machine 20, protective cover 10, think that video camera 10 is powered and/or the image transmitting that gathers video camera 10 is to control
The computer at center processed.Video camera 20 is placed in the bottom of protective cover 10 in the embodiment, and its camera lens 21 is towards the top of protective cover 10
Portion.First opening 11 and the second opening 12 are located at two relative sides of protective cover 10 respectively, when mounted, can court respectively
To road both direction.
In this embodiment, the protective cover 10 is vertically arranged, and the He of the first speculum 13 is provided with the protective cover 10
In setting angle between second speculum 14 the two speculums, two described speculums, angle can be set according to the actual requirements
Put.First speculum 13 and the second speculum 14 are respectively for the described first opening 11 and second opening 12, two speculums
Projection the camera lens 21 is covered, to enable the camera lens 21 while gathering the image in two speculums.
Fig. 3 is the installment state schematic diagram of embodiment illustrated in fig. 2, as seen from Figure 3, and during installation, video frequency velometer can position
Top in the edge of road, the first opening 11 and the second opening 12 are respectively facing the both direction of road.In the embodiment, lead to
Two mirror surfaces crossed before camera lens are so that a video camera is i.e. it can be seen that the video image of both direction.
For example, when vehicle goes to B from A points, can be referring initially to positioned at A point vehicles in video, it is assumed that the time is T1, works as car
When going to B points, can occur the vehicle again in video, it is assumed that the time is T2, the computer of video frequency velometer connection can lead to
Cross vehicle detection or number plate of vehicle is accurately positioned vehicle.Now the speed of vehicle can be by vehicle from A points passing through to B points
Time and obtained apart from calculating.
For example, V=(L1+L2)/(T2-T1)；
Wherein L1 be vehicle A points to the distance of B points, L2 is Vehicle length.
In actual use, general video camera setting height(from bottom) is 6-12 meters, and the distance of A points to B points is generally 50-100m,
Even now vehicle location has a small amount of error, such as 1-2 meters, range rate error is also no more than 4%；It can be good at meeting real
The demand of border application.Also, the multidirectional video of stringent synchronization is obtained in same camera lens, and same vehicle is all in multidirectional video
Occur, and it is spaced apart, and this distance is much larger than the error that Vehicle length or video frequency vehicle position are determined, such as 30 meters
More than.Then time interval of the vehicle by specified point in the two videos is calculated by video analysis, and combines actual range
Calculate the actual speed for obtaining vehicle.It is noted that the parameter such as distance, error of above-mentioned use of arguing all is exemplary,
The limitation applied to the present invention is not constituted.
Fig. 4 is the installment state schematic diagram of an alternative embodiment of the invention, as seen from Figure 4, described in this embodiment
Video camera 20 is identical with the embodiment shown in Fig. 2, only includes a camera lens 21, and the protective cover 10 is obliquely installed, and described first
The opening 12 of opening 11 and second is located at two adjacent sides of the protective cover 10 respectively, and first opening 11 is located at described
The left surface of protective cover 10, the left surface is open towards a direction of the road, the camera lens 21 towards described first
11；
Second opening 12 is located at the downside of the protective cover, the opposing party of the downside towards the road
To being provided with the 3rd speculum 45 in the protective cover 10, the 3rd speculum 45 is located at the camera lens 21 towards institute
On the direction for stating the first opening 11, towards the camera lens 21, with the described second opening 12 in setting angle, to cause the camera lens
21 can gather the image in first opening 11 and 12 visuals field of the second opening simultaneously.
The mode of testing the speed of the embodiment can be identical with the embodiment shown in Fig. 4, seldom repeats.
During Fig. 5 is the installment state schematic diagram of yet another embodiment of the present invention, the embodiment, the video camera 50 is (right
Answer video camera 20 above) comprising two synchronous camera lenses, respectively the first camera lens 51 and the second camera lens 52, the He of the first camera lens 51
Second camera lens 52, when mounted, can be respectively for the first opening and the second opening 12.The camera lens of first camera lens 51 and second
52 can be CCD (Charge-coupled Device, charge coupled cell) or CMOS camera lenses, and each camera lens is each towards one
Individual direction or visual field.
In addition, include one of the video frequency velometer in the present invention can realize the IMAQ of the multiple positions of both direction,
It can also pass through the camera of stringent synchronization control to realize by two.For example, in embodiment shown in Fig. 6, protective cover
10 are internally provided with two video cameras 20, each self-contained camera lens 21, two camera lenses respectively for protective cover an opening,
Seldom repeat.
In two embodiments shown in Fig. 5 and Fig. 6, by way of video acquisition is calculated car speed and Fig. 3
Shown embodiment is identical, therefore seldom repeats.
More intuitively to show embodiments of the invention, Fig. 7 is given, Fig. 7 is the video measurement of the embodiment of the present invention
Method schematic diagram.From fig.7, it can be seen that the video frequency speed-measuring method includes：Step 700, gathered with aforementioned video tachymeter on road
The image of the driving state of target vehicle of both direction；Step 702, the view data gathered according to the video frequency velometer is to mesh
Mark vehicle and carry out speed calculating, the calculating is carried out by the position and traveling time of the target vehicle.
Specifically, the calculating can use below equation：Displacement/generation displacement correspondence of speed=target vehicle
Time.That is, it can be obtained by speed with the displacement divided by the corresponding traveling time of the generation displacement of target vehicle.
Specifically, the identification of the target vehicle can be carried out according to car plate, or be entered according to other features of vehicle
OK.
The present invention, which is provided with, to gather the video camera of the image of vehicle running state in road both direction simultaneously, and is led to
Cable transmission is crossed to computer, by traveling of the computer according to the marker recognitions such as car plate same vehicle when image, judge same
Time difference and operating range of the vehicle on road between appearance twice, and the travel speed of vehicle is judged accordingly, so as to calculate
Go out the accurate travel speed of vehicle.
The present invention is by vehicle in two visual fields of Complete Synchronization (time, frame per second, space) between the time of ad-hoc location
Every the correct velocity that vehicle is obtained with distance calculating.Also, the present invention is in the same camera video ken, dual area generation is supported
Boundary's coordinate demarcation, carries out vehicle location detection and track following.Based on same video camera CCD (Charge-coupled
Device, charge coupled cell), video output component and mirror-reflection principle is combined, while obtaining two correlations regarding by force
The frequency ken, it is synchronous to carry out vehicle tracking measurement, it is to avoid clock is synchronously impacted to vehicle speed measuring.
It should be noted last that, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention.
Claims (1)
1. a kind of video frequency velometer, is installed on the support of road edge, the video frequency velometer includes video camera and computer
Equipment, the video camera and computer equipment are separate in physical state, and the video camera is connected by data line
The computer equipment, the computer equipment is used to enter driving to target vehicle according to the view data of the camera acquisition
Speed is calculated, and a protective cover is provided with the support, it is characterised in that described video frequency velometer includes a video camera, should
Video camera includes graphics processing unit and a charge coupled cell CCD camera lens, and the camera lens can be gathered two on the road
The image of the vehicle running state in individual direction；
The protective cover has the first opening and the second opening, and first opening and the second opening are respectively facing two sides of road
To；
The protective cover is obliquely installed, and first opening and the second opening are located at two adjacent sides of the protective cover respectively
Face, first opening is positioned at the left surface of the protective cover, and the left surface is towards a direction of the road, the mirror
Head are open to described first；
It is described second opening positioned at the protective cover downside, the downside towards the road other direction, it is described
It is provided with a speculum in protective cover, the speculum is located at the camera lens towards on the direction of the described first opening, towards
The camera lens, with the described second opening in setting angle, to enable the camera lens while gathering first opening and institute
State the image in the second opening visual field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410208606.4A CN104091450B (en) | 2014-05-16 | 2014-05-16 | A kind of video frequency velometer and video frequency speed-measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410208606.4A CN104091450B (en) | 2014-05-16 | 2014-05-16 | A kind of video frequency velometer and video frequency speed-measuring method |
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| CN104091450A CN104091450A (en) | 2014-10-08 |
| CN104091450B true CN104091450B (en) | 2017-08-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487322A (en) * | 2016-01-26 | 2016-04-13 | 东莞市普密斯精密仪器有限公司 | Lens structure of double image capturing and velocity measuring method utilizing same |
| CN106340185B (en) * | 2016-09-08 | 2019-08-20 | 杭州数梦工场科技有限公司 | The detection method and device of fee evasion vehicle |
| CN106872722B (en) * | 2017-04-25 | 2019-08-06 | 北京精英智通科技股份有限公司 | A kind of measurement method and device of speed |
| CN113556452B (en) * | 2021-07-19 | 2022-06-17 | 柴勇 | Photographing device and photographing method |
| CN114267183A (en) * | 2021-12-22 | 2022-04-01 | 临沂鼎甲建筑科技有限公司 | Traffic control system with speed measuring function for town roads |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0918383A (en) * | 1995-06-28 | 1997-01-17 | Fuji Electric Co Ltd | Mobile object identification device |
| JP2001209885A (en) * | 2000-01-28 | 2001-08-03 | Nissin Electric Co Ltd | Number plate reader |
| CN101187671B (en) * | 2007-12-27 | 2010-06-02 | 北京中星微电子有限公司 | Method and device for determining automobile driving speed |
| CN101551585A (en) * | 2008-04-01 | 2009-10-07 | 晶宏半导体股份有限公司 | Image shooting device in panorama mode |
| CN101546111A (en) * | 2009-04-30 | 2009-09-30 | 浙江大学 | Method for twin-lens wide baseline catadioptric omnidirectional stereo imaging by using single camera and device thereof |
| CN101833863B (en) * | 2010-05-17 | 2013-09-11 | 瑞斯康达科技发展股份有限公司 | Method and device for detecting vehicle flow speed, as well as method and system for controlling traffic lights |
| CN203288083U (en) * | 2013-03-19 | 2013-11-13 | 北京万集科技股份有限公司 | Laser 3D vehicle scanning device |
| CN203849866U (en) * | 2014-05-16 | 2014-09-24 | 吴柯维 | Video velocimetry |
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