CN107119543B - A kind of contactless through street deflection testing system - Google Patents
A kind of contactless through street deflection testing system Download PDFInfo
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- CN107119543B CN107119543B CN201710148105.5A CN201710148105A CN107119543B CN 107119543 B CN107119543 B CN 107119543B CN 201710148105 A CN201710148105 A CN 201710148105A CN 107119543 B CN107119543 B CN 107119543B
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- area array
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
Abstract
The invention proposes a kind of contactless through street deflection testing systems, comprising: step 1, prepares deflection testing method used unit: load vehicle, the first detection beam, the second detection beam, support wheel, hinge, rear load wheels, line laser transmitter, CCD area array cameras；Step 2, load vehicle is supported on road by preceding load wheels and rear load wheels, and one end of the first detection beam is connected with rear load wheels, and one end of the other end and the second detection beam is connected by a hinge, and the other end of the second detection beam is connected with support wheel；Interval is equipped with 14 groups of displacement sensors on first detection beam and the second detection beam, and every group of displacement sensor includes a line laser transmitter and a CCD area array cameras；Step 3, the maximum flexure amount that beam measures road surface rebound front and back respectively is detected using two, to calculate rebound deflection amount；Step 4, deflection basin curve is fitted using cubic spline interpolation, is finally reached measurement purpose.
Description
Technical field
The present invention is based on road traffic environment detection technique field more particularly to a kind of contactless through street flexure inspections
Examining system.
Background technique
Nearly ten years, highway in China communication is quickly grown, and is a spotlight of economic development.On the one hand, traffic base
Infrastructure constantly improve, and mileage open to traffic is growing day by day, is greatly promoted the connection and development of regional economy；On the other hand, it hands over
Logical transport capacity greatly improves, and safety assurance ability is remarkably reinforced, and provides great convenience and feels at ease for people's trip.
There is also many problems while quick step is advanced for highway construction.Firstly, China's highway, which exists, uses the longevity
The not long problem of life, road surface will appear some breaking-up road conditions, such as cement pavement joint failure, faulting of slab ends, collapse, bituminous pavement
Crack, pit slot, cracking, track etc..Secondly, highway by natural cause and vehicular load because being influenced for a long time and being built
Quality problems that may be present in the process, can all lead to highway premature breakdown in service life, and pavement damage will cause driving
Safety problem and the comfort level for influencing trip.Therefore, the operational management of highway and road while fast-developing highway construction
Face maintenance also becomes the most important thing.Guarantee its higher service level in the highway service time limit, improves its persistence
And bearing capacity, it is the basic demand of Highway Maintenance.Accomplish high efficiency, the high quality of highway maintenance, it is necessary to real-time, objective
Grasp highway specific situation, this is just needed using advanced quick pavement detection technology to the quality index of highway pavement such as
Road surface breakage, track, flexure etc. are detected and are evaluated.
Currently, flexure is that characterization highway subgrade pavement is whole among highway construction, final acceptance of construction and pavement maintenance management
The important indicator of intensity evaluation.Deflection test from the automatic detection of computer control is developed to based on artificial detection, from damage
The detection of bad pavement structure develops to non-destructive testing.Different testing principles, the working method and applicable elements of testing equipment are not yet
Together.Benkleman beam deflectometer, nineteen fifty-three occur, and as initial deflection testing instrument, it is according to simple lever principle benefit
It is measured with backman beam, dial gauge etc., needs a large amount of staff.In order to reduce the personnel to operate, raising detection efficiency,
Increase data reliability, twentieth century the seventies and eighties English, Fa Dengguo has developed can automatically continuously detect pavement deflection
Autodeflectometer, it is to reduce manual operation using computer controlled measurement system.By research discovery backman beam and certainly
There is limitation in the static flexure of dynamic deflection instrument measurement, cannot evaluate the performance of subgrade and pavement well in practical applications.Beauty
The states such as state, Denmark, Sweden have developed hammer-falling deflectometer, and dynamic deflection is tested using displacement sensor, and dynamic deflection more accords with
Close the structure and material technical characteristic of practical subgrade and pavement.In order to not influence traffic, the countries such as European Sweden in the detection process
Research institution have investigated laser-Doppler benkelman beams deflectometer, be detected during high speed driving using laser doppler technique it is dynamic
State flexure, at present also in research test phase.
The deficiencies such as that there are detection efficiencies is low for the existing deflection testing equipment and technology in China, precision is low.Therefore, China is badly in need of grinding
Study carefully advanced quick, high-precision, the quick deflection testing equipment for meeting the relevant pavement detection standard criterion in the country out, simplifies flexure
Testing process reduces the manpower and expense of maintenance of highway pavement, and reduces the degree of dependence to external deflection test product.To
Independent development goes out advanced deflection test technology, and then improves deficiency existing for current deflection test technology, and final research and development are provided
There is the deflection test instrument and equipment of independent intellectual property right, it would be desirable to rely on new theoretical result and technology.Therefore the present invention mentions
Contactless through street deflection testing equipment and detection method out, to meet the theory demands of novel device research and development.
Summary of the invention
Technical problem solved by the invention is to provide a kind of contactless through street deflection testing method, to solve
The problems in above-mentioned background technique.
A kind of contactless through street deflection testing system, comprising the following steps:
Step 1, prepare deflection testing method used unit, comprising: load vehicle (1), the first detection beam (2), the second detection
Beam (3), support wheel (4), hinge (5), preceding load wheels (7), rear load wheels (6), line laser transmitter, CCD area array cameras；
Step 2, the load vehicle (1) is supported on road by preceding load wheels (7) and rear load wheels (6), and described first
One end of detection beam (2) is connected with rear load wheels (6), and one end of the other end and the second detection beam (3) is connected by hinge (5)
It connects, the other end of the second detection beam (3) is connected with support wheel (4)；
Interval is equipped with 14 groups of displacement sensors in first detection beam (2), and every group of displacement sensor includes a line laser
Transmitter and a CCD area array cameras；
Interval is equipped with 14 groups of displacement sensors in second detection beam (3), and every group of displacement sensor includes a line laser
Transmitter and a CCD area array cameras；
The position that the displacement sensor on displacement sensor and the second detection beam (3) in first detection beam (2) is arranged
It is symmetrical about hinge (5)；
Step 3, the rear load wheels (6) of load vehicle travel when on pavement of road, appoint some conducts taken on pavement of road
Test point A；
Step 31, when rear load wheels (6) drive at test point A, if position at this time is position 1, all line lasers
Transmitter emits line laser to pavement of road, the line laser on all CCD area array cameras acquisition pavement of road；
Step 32, appoint and take one group of displacement sensor on the first detection beam (2) as current displacement sensor i, it is described to work as
Preceding displacement sensor i includes line laser reflector i and CCD area array cameras i, most by i-th point on the tested road surface of formula (1) calculating
Big flexure amount l1i:
In formula (1), i=1,2 ..., 14；xiTest point A is applied to for no load and when load is applied to test point A
The moving distance of CCD area array cameras i picture point；L2iThe object distance of CCD area array cameras i, L when being applied to test point A for load1iTo carry
The image distance of CCD area array cameras i, α when lotus is applied to test point AiInclination for CCD area array cameras i relative to line laser reflector i
Angle, βiFor the image planes drift angle of CCD area array cameras i；
Step 33, step 32 is repeated, until 14 displacement sensors in the first detection beam (2) all measure road respectively
The maximum flexure amount of 14 points on road surface executes step 34；
Step 34, when load vehicle after load wheels (6) travel and leave test point A, and the second detection beam (3) is into position 1
When position where the first detection beam (2), if position at this time is position 2, all line laser transmitters emit to pavement of road
Line laser, all CCD area array cameras acquire the line laser on pavement of road；
Step 35, appoint and take one group of displacement sensor on the second detection beam (3) as current displacement sensor j, it is described to work as
Preceding displacement sensor j includes line laser reflector j and CCD area array cameras j, calculates unloading for jth point on tested road surface by formula (2)
Maximum flexure amount l after load0j:
In formula (1), j=1,2 ..., 14；xjCCD area array cameras j picture when being applied to A point for load and when load leaves A point
The moving distance of point；L2jThe object distance of CCD area array cameras j, L when leaving A point for load1jBattle array phase in the face CCD when leaving A point for load
The image distance of machine j, αjTilt angle for CCD area array cameras j relative to line laser reflector j, βjFor the image planes of CCD area array cameras j
Drift angle；
Step 36, step 35 is repeated, until 14 displacement sensors in the second detection beam (3) all measure road respectively
Maximum flexure amount after the unloading of 14 points, executes step 4 on road surface；
Step 4, the rebound deflection amount l of the nth point on tested road surface is obtained by formula (3)n:
In formula (3), i=1,2 ..., 14；J=1,2 ..., 14；N=1,2 ..., 14；
The rebound deflection amount of 14 points: l can be obtained1,l2,...,l14；
Step 5, it is carried out curve fitting using rebound deflection amount of the cubic Bézier curves method to 14 points that step 4 obtains,
Obtain deflection basin curve.
Compared with prior art, the present invention has following technical effect that
The present invention is based on independent developments to go out advanced quick deflection test technology, exists improving current deflection test technology
Deficiency on the basis of, propose new road bend detection thinking, be deflection test instrument and equipment with independent intellectual property rights
Research and development provide fundamental basis.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of detection device in the present invention.
Fig. 2 is the key step flow chart of contactless through street deflection testing method in the present invention.
Fig. 3 is that the basic detection of the displacement sensor constituted in the present invention based on laser emitter and CCD area array cameras is former
Reason.
Fig. 4 is the image that typical line laser is mirrored by road bend in the present invention.
Fig. 5 is road surface in the present invention by the linear deformation curve shape after tyre load.
Fig. 6 (a) is maximum flexure l in the present invention0Schematic diagram；It (b) is the road surface maximum flexure l after rebound1Signal
Figure.
Fig. 7 is the quick testing principle of pavement deflection based on line laser and image in the present invention.
Fig. 8 is the corresponding deflection basin of different modulus and its intersection point in the present invention.
Fig. 9 is the distribution map of road surface deflection testing point in the present invention.
Figure 10 is the deflection basin curve shape after fitting.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Embodiment 1
Present embodiments provide a kind of contactless through street deflection testing system, comprising the following steps:
Step 1, prepare deflection testing method used unit, as shown in Figure 1, comprising: load vehicle (1), the first detection beam
(2), the second detection beam (3), support wheel (4), hinge (5), rear load wheels (6), line laser transmitter, CCD area array cameras；
Step 2, the load vehicle (1) is supported on road by preceding load wheels (7) and rear load wheels (6), and described first
One end of detection beam (2) is connected with rear load wheels (6), and one end of the other end and the second detection beam (3) is connected by hinge (5)
It connects, the other end of the second detection beam (3) is connected with support wheel (4)；
In the present embodiment, the drive axle of the first detection beam (2) and rear load wheels (6) is rigidly connected, and jumps up and down with load wheels
It is dynamic.
Interval is equipped with 14 groups of displacement sensors in first detection beam (2), and every group of displacement sensor includes a line laser
Transmitter and a CCD area array cameras；
Interval is equipped with 14 groups of displacement sensors in second detection beam (3), and every group of displacement sensor includes a line laser
Transmitter and a CCD area array cameras；
The position that the displacement sensor on displacement sensor and the second detection beam (3) in first detection beam (2) is arranged
Symmetrically about hinge (5), for the road surface road deformation of acquisition road.
Step 3, the rear load wheels (6) of load vehicle travel when on pavement of road, appoint some conducts taken on pavement of road
Test point A；
Step 31, when rear load wheels (6) drive at test point A, if position at this time is position 1, all line lasers
Transmitter emits line laser to pavement of road, the line laser on all CCD area array cameras acquisition pavement of road；
For the rebound deflection of measurement road, it is necessary first to which road pavement applies certain load, brings it about deformation, road surface
By the linear deformation curve shape after tyre load as shown in figure 5, road surface will appear such as figure under the load effect of load wheels
Deflection basin curve shown in 5, under normal circumstances, longitudinal radius L of the deflection basin is about 3 meters, therefore be arranged in the present embodiment
Every detection beam length is 3600mm, to guarantee accuracy when measurement.
Step 32, appoint and take one group of displacement sensor on the first detection beam (2) as current displacement sensor i, it is described to work as
Preceding displacement sensor i includes line laser reflector i and CCD area array cameras i, most by i-th point on the tested road surface of formula (1) calculating
Big flexure amount l1i:
In formula (1), i=1,2 ..., 14；xiTest point A is applied to for no load and when load is applied to test point A
The moving distance of CCD area array cameras i picture point；L2iThe object distance of CCD area array cameras i, L when being applied to test point A for load1iTo carry
The image distance of CCD area array cameras i, α when lotus is applied to test point AiInclination for CCD area array cameras i relative to line laser reflector i
Angle, βiFor the image planes drift angle of CCD area array cameras i；
The basic testing principle for the displacement sensor that laser emitter and CCD area array cameras are constituted is as shown in figure 3, line laser
When being radiated on datum level, some light is by road reflection and is mapped on the ccd sensor of area array cameras.Make in no load
The laser beam of used time, laser line generator transmitting are radiated at tested surface B point, and luminous point B ' is imaged in camera image planes, when standard load is made
For point B, vertical displacement can occur for tested surface to point A, then the luminous point in image planes is moved to A ', and moving distance x and tested surface are most
Big flexure is corresponding.
Step 33, step 32 is repeated, until 14 displacement sensors in the first detection beam (2) all measure road respectively
The maximum flexure amount of 14 points on road surface executes step 34；
Step 34, when load vehicle after load wheels (6) travel and leave test point A, and the second detection beam (3) is into position 1
When position where the first detection beam (2), if position at this time is position 2, all line laser transmitters emit to pavement of road
Line laser, all CCD area array cameras acquire the line laser on pavement of road；
Step 35, appoint and take one group of displacement sensor on the second detection beam (3) as current displacement sensor j, it is described to work as
Preceding displacement sensor j includes line laser reflector j and CCD area array cameras j, calculates unloading for jth point on tested road surface by formula (2)
Maximum flexure amount l after load0j:
In formula (1), j=1,2 ..., 14；xjCCD area array cameras j picture when being applied to A point for load and when load leaves A point
The moving distance of point；L2jThe object distance of CCD area array cameras j, L when leaving A point for load1jBattle array phase in the face CCD when leaving A point for load
The image distance of machine j, αjTilt angle for CCD area array cameras j relative to line laser reflector j, βjFor the image planes of CCD area array cameras j
Drift angle；
Step 36, step 35 is repeated, until 14 displacement sensors in the second detection beam (3) all measure road respectively
Maximum flexure amount after the unloading of 14 points, executes step 4 on road surface；
Step 4, the rebound deflection amount l of the nth point on tested road surface is obtained by formula (3)n:
In formula (3), i=1,2 ..., 14；J=1,2 ..., 14；N=1,2 ..., 14；
The rebound deflection amount of 14 points: l can be obtained1,l2,...,l14；
Step 5, it is carried out curve fitting using rebound deflection amount of the cubic Bézier curves method to 14 points that step 4 obtains,
It can be acquired according to " a kind of algorithm of subdivision of cubic nonratio- nal B-spline curve " of " computer engineering and application " 2008 Published in China Pharmacy curved
Heavy pelvic curvature line, curve shape are as shown in Figure 10.
Claims (1)
1. a kind of contactless through street deflection testing method, which comprises the following steps:
Step 1, prepare deflection testing method used unit, comprising: load vehicle (1), the first detection beam (2), the second detection beam
(3), support wheel (4), hinge (5), preceding load wheels (7), rear load wheels (6), line laser transmitter, CCD area array cameras；
Step 2, the load vehicle (1) is supported on road by preceding load wheels (7) and rear load wheels (6), first detection
One end of beam (2) is connected with rear load wheels (6), and one end of the other end and the second detection beam (3) is connected by hinge (5), the
The other end of two detections beam (3) is connected with support wheel (4)；
Interval is equipped with 14 groups of displacement sensors in first detection beam (2), and every group of displacement sensor includes a line laser transmitting
Device and a CCD area array cameras；
Interval is equipped with 14 groups of displacement sensors in second detection beam (3), and every group of displacement sensor includes a line laser transmitting
Device and a CCD area array cameras；
Displacement sensor in first detection beam (2) with second detect the position arranged of displacement sensor on beam (3) about
Hinge (5) is symmetrical；
Step 3, the rear load wheels (6) of load vehicle travel when on pavement of road, appoint and being a little used as on pavement of road is taken to test
Point A；
Step 31, when rear load wheels (6) drive at test point A, if position at this time is position 1, all line laser transmittings
Device emits line laser to pavement of road, the line laser on all CCD area array cameras acquisition pavement of road；
Step 32, appoint and take one group of displacement sensor on the first detection beam (2) as current displacement sensor i, the present bit
Displacement sensor i includes line laser reflector i and CCD area array cameras i, and the maximum for calculating i-th point on tested road surface by formula (1) is curved
Heavy amount l1i:
In formula (1), i=1,2 ..., 14；xiTest point A is applied to for no load and the face CCD battle array when load is applied to test point A
The moving distance of camera i picture point；L2iThe object distance of CCD area array cameras i, L when being applied to test point A for load1iIt is applied to for load
The image distance of CCD area array cameras i, α when test point AiTilt angle for CCD area array cameras i relative to line laser reflector i, βiFor
The image planes drift angle of CCD area array cameras i；
Step 33, step 32 is repeated, until 14 displacement sensors in the first detection beam (2) all measure pavement of road respectively
The maximum flexure amount of upper 14 points executes step 34；
Step 34, when load vehicle after load wheels (6) travel and leave test point A, and the second detection beam (3) is into position 1 first
When detecting the position where beam (2), if position at this time is position 2, all line laser transmitters swash to pavement of road emission lines
Light, all CCD area array cameras acquire the line laser on pavement of road；
Step 35, appoint and take one group of displacement sensor on the second detection beam (3) as current displacement sensor j, the present bit
Displacement sensor j includes line laser reflector j and CCD area array cameras j, is calculated on tested road surface after the unloading of jth point by formula (2)
Maximum flexure amount l0j:
In formula (1), j=1,2 ..., 14；xjCCD area array cameras j picture point when being applied to A point for load and when load leaves A point
Moving distance；L2jThe object distance of CCD area array cameras j, L when leaving A point for load1jCCD area array cameras j when leaving A point for load
Image distance, αjTilt angle for CCD area array cameras j relative to line laser reflector j, βjFor the image planes drift angle of CCD area array cameras j；
Step 36, step 35 is repeated, until 14 displacement sensors in the second detection beam (3) all measure pavement of road respectively
Maximum flexure amount, executes step 4 after the unloading of upper 14 points；
Step 4, the rebound deflection amount l of the nth point on tested road surface is obtained by formula (3)n:
In formula (3), i=1,2 ..., 14；J=1,2 ..., 14；N=1,2 ..., 14；
The rebound deflection amount of 14 points: l can be obtained1,l2,...,l14；
Step 5, it is carried out curve fitting, is obtained using rebound deflection amount of the cubic Bézier curves method to 14 points that step 4 obtains
Deflection basin curve.
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| IT201900021270A1 (en) * | 2019-11-15 | 2021-05-15 | Pirelli | METHOD AND SYSTEM TO ESTIMATE A PARAMETER OF DISUNIFORMITY OF A ROAD SEGMENT |
| CN111172850B (en) * | 2020-03-18 | 2021-12-14 | 河南交院工程技术集团有限公司 | Dynamic measuring device for road deflection value and dynamic measuring deflection beam for deflection value |
| CN111188250B (en) * | 2020-03-18 | 2022-03-15 | 河南交院工程技术集团有限公司 | Dynamic measuring method and device for road deflection value |
| CN115217018A (en) * | 2022-07-11 | 2022-10-21 | 武汉光谷卓越科技股份有限公司 | Deflection basin detection method and device based on deformation speed under rolling load effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6459113A (en) * | 1987-08-31 | 1989-03-06 | Komatsu Mfg Co Ltd | Measurement of deflection for road surface |
| CN101831862B (en) * | 2009-03-11 | 2013-03-13 | 南京理工大学 | Laser high-speed detection system for road surface deflection |
| JP5923358B2 (en) * | 2012-03-26 | 2016-05-24 | ニチレキ株式会社 | Road surface deflection measuring device and measuring method |
| CN103643620B (en) * | 2013-12-18 | 2016-08-24 | 北京市路兴公路新技术有限公司 | A kind of laser beam depth of parallelism regulation system and method measured for pavement deflection |
| CN103643621B (en) * | 2013-12-19 | 2016-01-20 | 南京理工技术转移中心有限公司 | Pavement deflection whole audience laser detecting method and detection system |
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Effective date of registration: 20210521 Address after: Room 403, unit 1, building 11, miaojiazhai community, Denggao Road, Qujiang New District, Xi'an, Shaanxi 710000 Patentee after: Xi'an kundou Technology Co.,Ltd. Address before: 710064 No. 126 central section of South Ring Road, Yanta District, Xi'an, Shaanxi Patentee before: CHANG'AN University |
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