CN109946483A - Test the speed standard set-up for a kind of scene - Google Patents
Test the speed standard set-up for a kind of scene Download PDFInfo
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- CN109946483A CN109946483A CN201910298982.XA CN201910298982A CN109946483A CN 109946483 A CN109946483 A CN 109946483A CN 201910298982 A CN201910298982 A CN 201910298982A CN 109946483 A CN109946483 A CN 109946483A
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Abstract
It tests the speed standard set-up the invention discloses a kind of scene, comprising: image capture module, image capture module, which is used to control signal according to Image Acquisition, carries out Image Acquisition；Speed measuring module, speed of the speed measuring module for test the speed tested motor vehicle and live test the speed the distance between standard set-up and tested motor vehicle；Control module, control module are connect with image capture module and speed measuring module respectively, for the output Image Acquisition control signal when distance is equal to or less than pre-determined distance；Image output module, image output module are connect with image capture module and speed measuring module respectively, and for exporting integrated image, integrated image includes the acquisition time of the image for being tested motor vehicle, speed and image.The invention avoids standard set-up and the inconsistent bring measurement error of tested automobile velocimeter detection zone, measurement accuracy is improved, while based on examining and determine under true traffic flow status, improving the convenience of calibrating.
Description
Technical field
The invention belongs to automobile velocimeter measurement verification technical field, test the speed standard more particularly, to a kind of scene
Device.
Background technique
The biography that metrological service, the country uses always the measurement verification of motor vehicle standard tachymeter scene range rate error at present
Metrograph is mounted on instruction carriage in the monitoring region of tested automobile velocimeter by speed limit value by system method
100% and 120%, which at the uniform velocity carries out practical road by monitoring region, runs, and is tested automobile velocimeter and carries out tachometric survey to instruction carriage
And take pictures, the live range rate error inspection of completion is compared with the measured value of tested automobile velocimeter for the measured value of metrograph
It is fixed.There are two drawbacks for the detection method: firstly, harsh to detection environmental requirement, it is desirable that detects live blocked road sport car and needs
It sport car could complete to detect repeatedly, since the motor vehicle travelled on real road is more and fast speed so on-site test portion
Lease making will often be detected at dead of night and be needed traffic control department cooperation road closure, bring hidden danger with safety to having a good transport and communication network, practical
Many difficulties can be encountered in operation, seriously affected the convenient of the measurement verification of motor vehicle standard tachymeter scene range rate error
Property.Secondly, it is difficult to ensure that metrograph is consistent with the measured zone that tested automobile velocimeter tests the speed, to live range rate error
Very big uncertainty is brought, measurement verification precision is affected.
Therefore, the convenient and high-precision measuring calibrating of automobile velocimeter how is realized, the technology for becoming urgently to be resolved is asked
Topic.
Summary of the invention
It tests the speed standard set-up the purpose of the present invention is to propose to a kind of convenient and high measurement accuracy scene.
To achieve the goals above, it tests the speed standard set-up the present invention provides a kind of scene, the standard set-up packet that tests the speed
It includes:
Image capture module, described image acquisition module, which is used to control signal according to Image Acquisition, carries out Image Acquisition；
Speed measuring module, the speed measuring module for measure the distance between itself and tested motor vehicle and it is described be tested it is motor-driven
The speed of vehicle；
Control module, the control module are connect with described image acquisition module and speed measuring module respectively, for described
Distance exports described image acquisition control signal when being equal to pre-determined distance；
Image output module, described image output module connect with described image acquisition module and the speed measuring module respectively
It connects, for exporting integrated image, the integrated image includes the image of tested motor vehicle, the speed of tested motor vehicle, Yi Jisuo
State the image acquisition time of image.
Preferably, the integrated image further includes the lane information and location information of tested motor vehicle.
Preferably, the speed that the distance is equal to pre-determined distance and the tested motor vehicle be greater than pre-set velocity and
When the difference for the two neighboring speed that the speed measuring module measures is less than preset difference value, the control module output described image acquisition
Control signal.
Preferably, the pre-determined distance is equal to the maximum detecting distance of tested automobile velocimeter.
Preferably, the speed measuring module includes transmitting radar antenna, multiple radar receiving antennas and the control panel that tests the speed, described
Transmitting radar antenna respectively with each radar receiving antenna communicate to connect, it is described test the speed control panel respectively with the radar emission day
Line and the communication connection of multiple radar receiving antennas.
Preferably, the control panel that tests the speed calculates the speed of the tested motor vehicle based on Doppler effect principle, passes through
FMCW CW with frequency modulation method calculates the distance.
Preferably, the speed measuring module is tested the speed the distance between standard set-up and tested by tested motor vehicle and scene
The angle between line and track direction between motor vehicle and the live standard set-up that tests the speed determines that the position of tested motor vehicle is believed
Breath.
Preferably, standard set-up central point O point is tested the speed as origin, with the direction by origin O perpendicular to lane using scene
Coordinate system is established to be parallel to track direction as Y-axis by origin for X-axis；The speed measuring module than phase angle measuring principle by surveying
The line between tested motor vehicle and the live standard set-up that tests the speed and the angle theta between Y-axis are measured, i.e., tested motor vehicle and scene are surveyed
The angle between line and track direction between fast standard set-up.
Preferably, the angle theta is calculated by following formula (4):
Wherein, λ is the wavelength for receiving signal,Signal and the second radar receiving antenna are received for the first radar receiving antenna
The phase difference of signal is received, d is the distance between the first radar receiving antenna and the second radar receiving antenna.
Preferably, the speed measuring module calculates the lane of tested motor vehicle by following formula (5):
Wherein, u is integer, indicates number of track-lines, w is lane width, d1It tests the speed standard set-up for tested motor vehicle and scene
Between distance along the x axis, Δ d is that scene is tested the speed standard set-up and nearest the distance between lane sideline, and [] expression takes
Integer.
The beneficial effects of the present invention are: standard set-up is tested the speed under true traffic flow status in scene of the invention, with
The vehicle of normally travel is measured target, measures, passes through to tested motor vehicle speed simultaneously with tested automobile velocimeter
The speed of the distance between speed measuring module measurement and tested motor vehicle and tested motor vehicle, setting and tested automobile velocimeter pair
The pre-determined distance answered, and different pre-determined distances can be set in every lane, when the tested motor vehicle of speed measuring module measurement and existing
When the distance between standard set-up is tested the speed equal to pre-determined distance in field, control image capture module acquires image, and speed is integrated
It is exported on the image of acquisition.To staff can by scene test the speed standard set-up acquisition information be tested it is motor-driven
The information of vehicle tachymeter acquisition compares, and completes the live range rate error calibrating of tested automobile velocimeter.Pass through pre-determined distance
Triggering, ensure that the scene standard set-up that tests the speed is consistent with the detection zone of tested automobile velocimeter, avoid standard and
Equipment under test measured zone difference bring measurement error improves measurement accuracy, while based under true traffic flow status
Calibrating, thoroughly solves the problems, such as that domestic demands road closure, sport car conventional method encounter, improves the convenience of calibrating, meet the world
The field testing procedure recommended in legality measurement tissue (OIML) international recommendation R91.
System of the invention has other characteristics and advantages, these characteristics and advantages from the attached drawing being incorporated herein and with
Will be apparent in specific embodiment afterwards, or by the attached drawing and subsequent specific embodiment being incorporated herein into
Row statement, these the drawings and specific embodiments in detail are used together to explain specific principle of the invention.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent.Wherein, in exemplary embodiment of the invention, identical appended drawing reference
Typically represent same parts.
Fig. 1 shows scene according to an embodiment of the invention and tests the speed the general structure schematic diagram of standard set-up.
It tests the speed the ratio phase angle measurement schematic diagram of standard set-up Fig. 2 shows scene according to an embodiment of the invention.
Appended drawing reference
1, it is tested motor vehicle；S1, first lane；S2, second lane；S3, third lane；S4, Four-Lane Road.
Specific embodiment
The preferred embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although being shown in attached drawing of the invention
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without should be by embodiments set forth herein institute
Limitation.On the contrary, thesing embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention
Completely it is communicated to those skilled in the art.
Test the speed standard set-up at a kind of scene according to the present invention, comprising:
Image capture module, image capture module, which is used to control signal according to Image Acquisition, carries out Image Acquisition；
Speed measuring module, speed measuring module are used to measure the speed of the distance between itself and tested motor vehicle and tested motor vehicle
Degree；
Control module, control module are connect with image capture module and speed measuring module respectively, default for being equal in distance
Apart from when output Image Acquisition control signal；
Image output module, image output module are connect with image capture module and speed measuring module respectively, for exporting collection
At image, integrated image includes image, the speed of tested motor vehicle and the image acquisition time of image of tested motor vehicle.
Specifically, automobile velocimeter is mandatory administration measurement instrument in accordance with the law, by measurement Law requirement every year will by the period into
Row calibrating.Always conventional method of the metrological service, the country to the calibrating application of motor vehicle speed measuring scene range rate error at present, machine
Motor-car tachymeter scene needs blocked road, be mounted with the instruction carriage of vehicle-mounted live standard tachymeter given travel speed point with
Tested automobile velocimeter carries out site road and tests the speed Comparability test.
And standard set-up setting is tested the speed beside road in scene of the invention, with normal row under true traffic flow status
The vehicle sailed is measured target, measures simultaneously to tested motor vehicle speed with tested automobile velocimeter, is arranged and is tested
Test the speed the distance between standard set-up for the corresponding pre-determined distance of automobile velocimeter, the tested motor vehicle of speed measuring module measurement and scene
With the speed of tested motor vehicle and be sent to image output module, when the tested motor vehicle and live marks for measuring velocity of speed measuring module measurement
When the distance between standard apparatus is equal to pre-determined distance, i.e., tested motor vehicle enters the detection zone of the live standard set-up that tests the speed, control
Molding block exports Image Acquisition control signal to image capture module, and image capture module acquires the image of true traffic and will adopt
The image of collection is sent to image output module, and speed is integrated on the image of acquisition and exports integrated figure by image output module
Picture.To which staff can do the image that the live image that test the speed standard set-up acquisition is acquired with tested automobile velocimeter
Compare, compare the speed of two Image Acquisition, to complete the live range rate error calibrating of tested automobile velocimeter, the present invention
Scene test the speed standard set-up measurement range be (20~330) km/h, the limits of error (MPE) be ± 1.0%.
It is tested the speed triggering of the standard set-up by pre-determined distance according to the scene of illustrative embodiment, ensure that live survey
Fast standard set-up is consistent with the detection zone of tested automobile velocimeter, avoids the inconsistent bring measurement of detection zone and misses
Difference improves measurement accuracy, while based on examining and determine under true traffic flow status, thoroughly solving domestic demands road closure, sport car passes
The problem of system method encounters improves the convenience of calibrating, meets in International Legal Organization (OIML) international recommendation R91 and pushes away
The field testing procedure recommended solves.
Preferably, the scene standard set-up that tests the speed further includes shell, image capture module, speed measuring module, control mould
Block and image output module are set in the housing.
Preferably, integrated image include the image of tested motor vehicle, speed, lane information, location information with
And the image acquisition time of image.
Preferably, speed measuring module determines quilt by tested motor vehicle and scene the distance between the standard set-up that tests the speed
Survey lane information, the location information of motor vehicle.
Specifically, speed measuring module calculates the lane of tested motor vehicle by being tested the distance between motor vehicle and standard set-up
Information, location information, and accurate lane information and location information are sent to image output module, image output module will be by
The image acquisition time for surveying the image of motor vehicle, the speed of tested motor vehicle, lane information, location information and image is integrated in
On the image of acquisition, and integrated image is exported, to be compared with the acquisition information of tested automobile velocimeter, standard of comparison dress
Set the location information of the tested motor vehicle of acquisition and when tested vehicle position information that tested automobile velocimeter acquires is consistent
The speed of measurement, to improve measurement accuracy.
Preferably, it is greater than pre-set velocity and survey in the speed that distance is equal to pre-determined distance and tested motor vehicle
When the difference for the two neighboring speed that fast module measures is less than preset difference value, control module exports Image Acquisition and controls signal.
Specifically, every 0.1 second of speed measuring module is by lane information, tested machine where tested motor vehicle speed, tested motor vehicle
The location information of motor-car passes to control module and image output module, and control module judges tested motor vehicle speed, if surveyed
The front and back obtained velocity amplitude fluctuation twice is greater than 0.2km/h and is then considered primary invalid measurement and carries out next velocity estimated automatically
In the period, when the adjacent velocity measurement twice of measurement module is less than 0.2km/h, then control module thinks the speed of this measurement
Value meets stability requirement.
When the distance between standard set-up is tested the speed equal to pre-determined distance, quilt in the tested motor vehicle of speed measuring module measurement and scene
When the difference for the two neighboring speed that the speed for surveying motor vehicle is greater than pre-set velocity and speed measuring module measures is less than 0.2km/h, control
Module exports Image Acquisition and controls signal, guarantees that the information of live standard set-up acquisition of testing the speed and tested automobile velocimeter acquire
Information it is identical, it is ensured that the consistency of comparison information improves measurement accuracy.
Preferably, pre-determined distance is equal to the maximum detecting distance of tested automobile velocimeter.
Specifically, the candid photograph detecting distance that the tested automobile velocimeter of different model is arranged all is different, i.e., maximum inspection
Ranging is different from all, according to the detecting distance of tested automobile velocimeter setting scene test the speed standard set-up it is default away from
From allowing the scene standard set-up that tests the speed to examine and determine a variety of different tested automobile velocimeters.
Preferably, the settable different pre-determined distance in different lanes.
Scene of the invention test the speed standard set-up using normally travel public vehicles be measurand without road closure, sport car, most
Triggering distance (i.e. pre-determined distance) can be respectively set in 8 lanes of more measurements, different lanes, have the ability for distinguishing lane, have
Adjustable trigger position keeps it consistent with equipment under test detection zone, have change speed limit value ability, battery power reservoir capacity compared with
It is long.
Preferably, test the speed standard set-up and tested automobile velocimeter of scene is arranged side by side.
Preferably, speed measuring module includes transmitting radar antenna, multiple radar receiving antennas and the control panel that tests the speed, thunder
Up to transmitting antenna respectively with each radar receiving antenna communicate to connect, test the speed control panel respectively with transmitting radar antenna and multiple thunders
It is communicated to connect up to receiving antenna.
Specifically, radar receiving antenna is at least two, the control panel that tests the speed triggering excitation transmitting radar antenna emits signal,
And multiple radar receiving antenna received signals are filtered enhanced processing, signal meter is received according to different radar receiving antennas
Calculate speed, the distance between tested motor vehicle and the live standard set-up that tests the speed.
Preferably, the control panel that tests the speed calculates the speed of tested motor vehicle based on Doppler effect principle, passes through
FMCW CW with frequency modulation method calculates distance.
Specifically, FMCW technology is existing mature technology in High Accuracy Radar ranging field, basic principle is that scene is surveyed
The transmitting radar antenna transmitting signal of fast standard set-up is high frequency continuous wave, and frequency changes according to triangular wave rule at any time,
The frequency of radar receiving antenna received signal is identical as the transmitting frequency changing rule of signal, is all triangular wave rule, only
There is a time difference, target range can be calculated using this small time difference, (1) calculating is tested motor-driven according to the following formula
Vehicle and the live standard set-up distance s that tests the speed:
Wherein, Fi2-Fi1Indicate that the first radar receiving antenna receives the phase that signal receives signal with the second radar receiving antenna
Potential difference, f2-f1Indicate that the difference on the frequency that the first radar receiving antenna receives signal and the second radar receiving antenna receives signal, c indicate
The spread speed of light in a vacuum.
It is existing mature technology using Doppler effect principle ranging, when tested motor vehicle is close to radar antenna, instead
Penetrating signal frequency will be above transmitter frequency；Conversely, reflection signal frequency will be less than when tested motor vehicle is gone far from antenna
Transmitter frequency.So by the change numerical value of frequency (motor vehicle can be tested and travelled in face of radar, Doppler frequency is positive；
When tested motor vehicle is travelled backwards to radar, Doppler frequency is negative), tested motor vehicle is calculated along quilt using following formula (2)
Survey the speed v in the line direction between motor vehicle and field speed measuring devicem:
Wherein, FdIndicate the frequency for the Doppler signal that radar receiving antenna receives.
It is calculated using following formula (3) and is tested the motor-driven speed v along track direction vehicle:
V=vm·cosθ (3)
Wherein, v indicates tested motor vehicle along the speed of track direction, and θ indicates that tested motor vehicle and scene test the speed standard dress
The angle between line and track direction between setting.
Preferably, speed measuring module by tested motor vehicle and scene test the speed the distance between standard set-up and by
The angle surveyed between line and track direction between motor vehicle and the live standard set-up that tests the speed determines the position of tested motor vehicle
Information.
Preferably, standard set-up central point O point is tested the speed as origin, to pass through origin O perpendicular to lane using scene
Direction be that X-axis to be parallel to track direction as Y-axis by origin establishes coordinate system.Speed measuring module passes through than phase angle measuring principle
The line between tested motor vehicle and the live standard set-up that tests the speed and the angle theta between Y-axis are measured, i.e., tested motor vehicle and scene
Test the speed the line between standard set-up and the angle between track direction.
Preferably, angle theta is calculated by following formula (4):
Wherein, λ is the wavelength for receiving signal,Signal and the second radar receiving antenna are received for the first radar receiving antenna
The phase difference of signal is received, d is the distance between the first radar receiving antenna and the second radar receiving antenna.
Specifically, explaining the origin of formula (4) by the following contents.Assuming that the first radar receiving antenna and the second radar connect
Receiving the distance between antenna is d, a signal from injecting the first radar receiving antenna and the second radar receiving antenna respectively at a distance,
The angle between line and Y-axis between tested motor vehicle and the first radar receiving antenna is θ1, it is tested motor vehicle and the second thunder
It is θ up to the line between receiving antenna and the angle between Y-axis2, R1For the lateral distance being tested between motor vehicle and Y-axis, R2For
Fore-and-aft distance between tested motor vehicle and the second radar receiving antenna position.It is available according to trigonometric function:
As R1 " d when, θ1=θ2, with θ unified representation θ1And θ2, between θ is tested motor vehicle and scene is tested the speed standard set-up
Line and Y-axis between angle, also cry direction of signal angle.
Signal injects radar receiving antenna along the direction that opposite radar receiving antenna has angle theta, and the first radar receives day
The time that line, the second radar receiving antenna receive signal respectively is certainly different, since time too short inconvenience goes to measure with t, leads to
Chang Huiyong phase replaces.
Reception signal wavelength is λ, and the first radar receiving antenna and the second radar receiving antenna phase of received signal difference are
Therefore the range difference of the first radar receiving antenna received signal and the second radar receiving antenna received signal are as follows:
Wherein, l is that the first radar receiving antenna receives signal and the second radar receiving antenna receives the distance between signal
Difference, l and the distance between the first radar receiving antenna and the second radar receiving antenna d, tested motor vehicle and measuring device place
The angle theta of position ordinate has following relationship:
It therefore can be in the hope of the angle of tested motor vehicle and measuring device position ordinate, i.e. direction of signal angle
Are as follows:
For example, establishing tripod according to on-site proving method in trackside, being placed in road shoulder, apart from 0.5-1.5 meters of road
Place, while pallet height need to be placed in 1.6 meters or more, live standard speed measuring device is set on pallet, and pallet and road are protected
Hold basic horizontal.Test the speed standard set-up central point O point as origin using scene, using by origin perpendicular to lane direction as X-axis,
To be parallel to track direction as Y-axis by origin, coordinate system, the specific location letter of the live standard set-up central point O that tests the speed are established
It ceases available.
According to than phase angle measuring principle it is found that scene test the speed standard set-up can measure its between tested motor vehicle away from
From s and angle theta, therefore tested motor vehicle and scene can be calculated and tested the speed between standard set-up distance d along the x axis1And
Distance d along the y axis2.The more specific location information of standard set-up central point O is it is known that d1, d2It is known that i.e. can determine be tested it is motor-driven
The more specific location information of vehicle.
Preferably, lane width is set as w, calculates number of track-lines u by following formula (5):
Wherein, u is integer, indicates number of track-lines, w is lane width, d1It tests the speed standard set-up for tested motor vehicle and scene
Between distance along the x axis, Δ d is that scene is tested the speed standard set-up and nearest the distance between lane sideline, and [] expression takes
Integer.
For example, setting lane width (such as 3.5m), then according to d1Size may determine which lane motor vehicle is located at.It is false
If scene is tested the speed, standard set-up is set on the left of first lane at the 0.5m of sideline, i.e. Δ d=0.5 is calculatedIt obtains
The integer part of the result, that is, u are determined to be located at first lane, second lane and third lane, that is, are judged
(d1- 0.5m) 0m-3.5m, which range of 3.5m-7.0m, 7.0m-10.5m be in.
Preferably, radar receiving antenna is 4.
Specifically, optional two radar receiving antennas receive day respectively as the first radar receiving antenna and the second radar
Line.
Preferably, image capture module is CCD camera.
Preferably, image capture module further includes image denoising processing module.
Image capture module specifically, scene is tested the speed in standard set-up is responsible for the image letter that shooting measures tested motor vehicle
Breath, including image collecting function, visibility detection function, image store function, image denoising function.
Image capture module uses CCD camera, and maximum pixel 12,000,000 is able to detect visibility, according to visibility height
Select the CCD camera of suitable filming frequency；Image can also be adjusted according to the actual conditions of weather, such as fine day, dense fog, heavy rain
The filming frequency of acquisition module improves the force trapping of vehicle image.
Image denoising module also uses adaptive wiener filter method or morphology noise filtering method to the image of acquisition
Denoising is carried out, the clarity of camera motor vehicle image is improved.
Embodiment
Fig. 1 shows scene according to an embodiment of the invention and tests the speed the general structure schematic diagram of standard set-up.Fig. 2
Scene according to an embodiment of the invention is shown to test the speed the ratio phase angle measurement schematic diagram of standard set-up.
Referring to figs. 1 and 2, test the speed standard set-up at a kind of scene, comprising:
Image capture module 102, image capture module 102, which is used to control signal according to Image Acquisition, carries out Image Acquisition；
Speed measuring module 104, speed measuring module 104 is for measuring the distance between itself and tested motor vehicle and tested motor vehicle
Speed；
Control module 106, control module 106 are connect with image capture module 102 and speed measuring module 104 respectively, are used for
Output Image Acquisition controls signal when distance is equal to or less than pre-determined distance；
Image output module 108, image output module 108 connect with image capture module 102 and speed measuring module 104 respectively
It connects, for exporting integrated image, integrated image includes the speed and image of the image of tested motor vehicle, tested motor vehicle
Image acquisition time.
Wherein, integrated image further includes the lane information and location information of tested motor vehicle.
Wherein, it is greater than pre-set velocity and speed measuring module survey in the speed that distance is equal to pre-determined distance and tested motor vehicle
When the difference of the two neighboring speed obtained is less than preset difference value, control module exports Image Acquisition and controls signal.
Wherein, pre-determined distance is equal to the maximum detecting distance of tested automobile velocimeter.
Wherein, speed measuring module 104 includes transmitting radar antenna, multiple radar receiving antennas and the control panel that tests the speed, radar hair
It penetrates antenna to communicate to connect with each radar receiving antenna respectively, the control panel that tests the speed connects with transmitting radar antenna and multiple radars respectively
Receive antenna communication connection.
Wherein, the control panel that tests the speed calculates the speed of tested motor vehicle based on Doppler effect principle, is connected by FMCW frequency modulation
Continuous wave method calculates distance.
Wherein, speed measuring module is tested the speed the distance between standard set-up and tested motor vehicle by tested motor vehicle and scene
The angle between line and track direction between the live standard set-up that tests the speed determines the location information of tested motor vehicle.
Wherein, standard set-up central point O point is tested the speed as origin using scene, is X to pass through origin O perpendicular to the direction in lane
Axis establishes coordinate system to be parallel to track direction as Y-axis by origin.Speed measuring module is tested by measuring than phase angle measuring principle
Test the speed standard for the angle theta between line and Y-axis between motor vehicle and the live standard set-up that tests the speed, i.e., tested motor vehicle and scene
The angle between line and track direction between device.
Wherein, the angle theta is calculated by following formula (4):
Wherein, λ is the wavelength for receiving signal,Signal and the second radar receiving antenna are received for the first radar receiving antenna
The phase difference of signal is received, d is the distance between the first radar receiving antenna and the second radar receiving antenna.
Wherein, the speed measuring module calculates the lane of tested motor vehicle by following formula (5):
Wherein, u is integer, indicates number of track-lines, w is lane width, d1It tests the speed standard set-up for tested motor vehicle and scene
Between distance along the x axis, Δ d is that scene is tested the speed standard set-up and nearest the distance between lane sideline, and [] expression takes
Integer.
The scene test the speed standard set-up the course of work it is as follows: speed measuring module 104 measures tested motor vehicle and tests the speed with scene
The speed of the distance between standard set-up and tested motor vehicle, based on tested motor vehicle and scene test the speed between standard set-up away from
From and tested motor vehicle and scene test the speed the line between standard set-up and the angle between track direction determine be tested it is motor-driven
The location information of vehicle determines that the position of tested motor vehicle is believed based on tested motor vehicle and live the distance between the standard set-up that tests the speed
Breath, the tested motor vehicle and scene measured when speed measuring module 104 test the speed the distance between standard set-up equal to pre-determined distance, and every
Different pre-determined distances (trigger position) can be set in lane, and the speed for being tested motor vehicle is greater than pre-set velocity and measurement module is surveyed
When the difference of the two neighboring speed obtained is less than preset difference value, control module 106 exports Image Acquisition and controls signal to Image Acquisition
Module 102, image capture module 102 acquire the image of true traffic, and image output module 108 is by speed, lane information, position
Information integration is on the image of acquisition, and test the speed the image information and the acquisition of tested automobile velocimeter that standard set-up acquires at scene
Image information compares, to complete the live range rate error calibrating of tested automobile velocimeter.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of embodiment described, for the art
Those of ordinary skill for many modifications and changes are obvious.
Claims (10)
1. test the speed standard set-up at a kind of scene, which is characterized in that the standard set-up that tests the speed includes:
Image capture module, described image acquisition module, which is used to control signal according to Image Acquisition, carries out Image Acquisition；
Speed measuring module, the speed measuring module are used to measure the distance between itself and tested motor vehicle and the tested motor vehicle
Speed；
Control module, the control module are connect with described image acquisition module and speed measuring module respectively, in the distance
Described image acquisition control signal is exported when equal to pre-determined distance；
Image output module, described image output module are connect with described image acquisition module and the speed measuring module respectively, are used
In output integrated image, the integrated image includes the speed and described image of the image of tested motor vehicle, tested motor vehicle
Image acquisition time.
2. test the speed standard set-up at scene according to claim 1, which is characterized in that the integrated image further includes tested machine
The lane information and location information of motor-car.
3. test the speed standard set-up at scene according to claim 1, which is characterized in that
It is greater than pre-set velocity and the speed measuring module in the speed that the distance is equal to pre-determined distance and the tested motor vehicle
When the difference of the two neighboring speed measured is less than preset difference value, the control module exports described image acquisition control signal.
4. test the speed standard set-up at scene according to claim 1, which is characterized in that the pre-determined distance is motor-driven equal to being tested
The maximum detecting distance of vehicle tachymeter.
5. test the speed standard set-up at scene according to claim 1, which is characterized in that
The speed measuring module includes transmitting radar antenna, multiple radar receiving antennas and the control panel that tests the speed, the radar emission day
Line respectively with each radar receiving antenna communicate to connect, it is described test the speed control panel respectively with the transmitting radar antenna and multiple thunders
It is communicated to connect up to receiving antenna.
6. test the speed standard set-up at scene according to claim 5, which is characterized in that the control panel that tests the speed is based on Doppler
Effect principle calculates the speed of the tested motor vehicle, calculates the distance by FMCW CW with frequency modulation method.
7. test the speed standard set-up at scene according to claim 2, which is characterized in that the speed measuring module is motor-driven by being tested
The line and vehicle that vehicle and scene are tested the speed between the distance between standard set-up and tested motor vehicle and the live standard set-up that tests the speed
Angle between road direction determines the location information of tested motor vehicle.
8. test the speed standard set-up at scene according to claim 7, which is characterized in that
Test the speed standard set-up central point O point as origin using scene, using by origin O perpendicular to lane direction as X-axis, to pass through
It is Y-axis that origin, which is parallel to track direction, establishes coordinate system；
The speed measuring module is by measuring line and Y between tested motor vehicle and the live standard set-up that tests the speed than phase angle measuring principle
Angle theta between axis, i.e., the angle between line and track direction between tested motor vehicle and the live standard set-up that tests the speed.
9. test the speed standard set-up at scene according to claim 8, which is characterized in that
The angle theta is calculated by following formula (4):
Wherein, λ is the wavelength for receiving signal,Signal is received for the first radar receiving antenna and the second radar receiving antenna receives
The phase difference of signal, d are the distance between the first radar receiving antenna and the second radar receiving antenna.
10. test the speed standard set-up at scene according to claim 7, which is characterized in that the speed measuring module passes through following public affairs
Formula (5) calculates the lane of tested motor vehicle:
Wherein, u is integer, indicates number of track-lines, w is lane width, d1It tests the speed edge between standard set-up for tested motor vehicle and scene
The distance of X-direction, Δ d are live test the speed standard set-up and nearest the distance between lane sideline, and [] indicates round numbers.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111783905A (en) * | 2020-09-07 | 2020-10-16 | 成都安智杰科技有限公司 | Target fusion method and device, storage medium and electronic equipment |
| CN112394198A (en) * | 2020-12-01 | 2021-02-23 | 中国计量科学研究院 | Single-side passive three-beam light shielding online speed and distance measuring standard device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111783905A (en) * | 2020-09-07 | 2020-10-16 | 成都安智杰科技有限公司 | Target fusion method and device, storage medium and electronic equipment |
| CN111783905B (en) * | 2020-09-07 | 2021-01-08 | 成都安智杰科技有限公司 | Target fusion method and device, storage medium and electronic equipment |
| CN112394198A (en) * | 2020-12-01 | 2021-02-23 | 中国计量科学研究院 | Single-side passive three-beam light shielding online speed and distance measuring standard device |
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