CN109946658A - A kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation - Google Patents
A kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation Download PDFInfo
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- CN109946658A CN109946658A CN201711391806.8A CN201711391806A CN109946658A CN 109946658 A CN109946658 A CN 109946658A CN 201711391806 A CN201711391806 A CN 201711391806A CN 109946658 A CN109946658 A CN 109946658A
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Abstract
The present invention provides a kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation, its technical characteristic is that bracket is horizontal positioned on the ground by lower margin, heelpiece is placed on the ground of the centre of bracket, metal plate is lain in a horizontal plane on heelpiece, thickness sample is horizontal positioned on a metal plate by stacked system, height-adjusting knob and height regulating frame are fixed on the crossbeam of bracket, antenna hanging beam is fixed on the lower beam of height regulating frame, ground exploring radar antenna is fixed in antenna hanging beam, height is adjusted according to the size of ground exploring radar antenna size and thickness sample group difference.Its advantage is that structure is simple, the chemistry and stable physical property of thickness sample group, uniformity is good and dielectric constant is stablized, convenient for storing, being unlikely to deform, each thickness needed for Ground Penetrating Radar calibration can be covered.Height adjusting function meets the calibration requirements of different type Ground Penetrating Radar, and simple, convenient, provides reliable basis for the data evaluation of Ground Penetrating Radar.
Description
Technical field
The present invention relates to a kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installations.
Background technique
In traffic transport industry, road surface thickness is construction of the highway, the pavement engineering quality in final acceptance of construction inspection is handed over to control
One of most important index.In the past, common detection methods (sand replacement method, core cutter method, the boring and coring of high grade highway pavement thickness
Method etc.) it is mainly bore extracting core process, not only low efficiency, representativeness are poor for this method, and cause destruction to highway.Highway section is visited
Laminate construction thickness Ground Penetrating Radar (hereinafter referred to as Ground Penetrating Radar) is injured with not damaged, high-efficient, high-resolution, anti-interference ability
The features such as strong, therefore answered extensively in road surface structare layer thickness measure and defect recognition (isolate, collapse, come to nothing, crack etc.)
With.
Ground Penetrating Radar is a kind of efficient GEOPHYSICS FOR SHALLOW LAYER Detection Techniques, it passes through transmitting high-frequency electromagnetic impulse wave, benefit
With the difference of underground medium electrical parameter, analyzed according to the kinematics such as the amplitude of echo, waveform and frequency and dynamic characteristic
With deduction dielectric structure and physical property characteristic.Since nineteen ninety-two, the Ground Penetrating Radar of external more companies is introduced in China.Foreign countries draw
Into Ground Penetrating Radar company include the U.S. GSSI and Penetradar, Sweden MALA, Canada S&S and Italy RIS etc., it is domestic
Qingdao electric wave institute, 22 institute, the Ministry of Electronics Industry, Chinese Academy of Sciences etc..The structure of typical Ground Penetrating Radar is generally divided into three parts: electromagnetism arteries and veins
Rush generator, antenna system and acquisition system.Different antennas is selected for different detection objective bodies.The major parameter of antenna
By the centre frequency and antenna of radar emission and the coupled modes of survey objective body, the ground exploring radar antenna frequency model generally used
It encloses are as follows: 25MHz ~ 2.5MHz.The frequency of antenna is higher, and resolution ratio is higher, then penetration depth is more shallow.Antenna includes the ground coupling
(ground-coupled) and Air Coupling (air-launched) two ways.
As equipment uses the growth of time, equipment occur, image bad such as interface contact discontinuously, it is fuzzy ask
Topic, not can guarantee the accurate and reliable of measurement data.But in industry and Ground Penetrating Radar calibrating installation is not set up, it cannot achieve this
The magnitude tracing of equipment.And the equipment do not measured carries out actual road surface thickness detection, the accuracy of testing result without
Method guarantees, then can not carry out effective evaluation to construction quality.For this purpose, according to JJG (traffic) 112-2015 " highway section flaw detection
And Laminate construction thickness Ground Penetrating Radar ", to Ground Penetrating Radar (the center of antenna frequency > for measuring road surface thickness in traffic transport industry
Magnitude tracing research 800MHz) is carried out, the calibrating installation based on thickness sample group is had developed.
Summary of the invention
The purpose of the present invention is deficiency present in view of the above technology, a kind of highway section flaw detection and structure thickness are provided
Spend Ground Penetrating Radar calibrating installation.It is the Ground Penetrating Radar calibrating installation using laser tracker as Main Regulator；Propose a kind of stabilization,
Uniform thickness sample group material is as Ground Penetrating Radar thickness sample group；Devise the Ground Penetrating Radar school for having height adjusting function
Standard apparatus.
The object of the present invention is achieved like this, including height-adjusting knob, height regulating frame, antenna hanging beam, bracket, day
Line, thickness sample, metal plate, heelpiece and lower margin.It is characterized in that bracket is horizontal positioned on the ground by lower margin, heelpiece is placed on
On the ground of the centre of bracket.Metal plate is lain in a horizontal plane on heelpiece, and thickness sample lies in a horizontal plane in metal by stacked system
On plate.Height-adjusting knob and height regulating frame are fixed on the crossbeam of bracket, and antenna hanging beam is threadedly secured to height and adjusts
On the lower beam for saving frame.Ground exploring radar antenna is threadedly secured in antenna hanging beam, according to ground exploring radar antenna size and
The size of thickness sample group is different and adjusts height.
Beneficial effects of the present invention
The composed structure of this calibrating installation is simple, and the chemistry and stable physical property of thickness sample group, uniformity is good and dielectric is normal
Number is stablized, convenient for storing, being unlikely to deform, each thickness needed for Ground Penetrating Radar calibration can be covered.Height adjusting function is met
The calibration requirements of different type Ground Penetrating Radar, and it is simple, convenient, by experimental verification, calibrating installation can be spy land mine
The data evaluation reached provides reliable basis.
Calibrating installation is according to the flaw detection of JJG (traffic) 124-2015 highway section and Laminate construction thickness Ground Penetrating Radar calibrating rule
Cheng Yanfa can effectively solve the problems, such as Ground Penetrating Radar magnitude tracing, provide reliable technical basis for the technology evaluation of Ground Penetrating Radar,
It finds out and needs adjustment or discarded instrument, to guarantee the reliable of Ground Penetrating Radar measurement data, filling up Ground Penetrating Radar can not be counted
The blank of amount, the transmission of quantity value for enterprise and institution's Ground Penetrating Radar in the whole country provide service.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of height regulating frame of the present invention.
Fig. 3 is the structural schematic diagram of thickness style (specification 1) of the present invention.
Fig. 4 is the structural schematic diagram of thickness sample (specification 2) of the present invention.
Specific embodiment
The present embodiment is described further with reference to the accompanying drawing
As shown in Figure 1, calibrating installation includes height adjustment device 1, bracket 2 ,-ground exploring radar antenna 3, thickness sample 4, metal plate
5, heelpiece 6, lower margin 7 and controller 8 etc..Its connection type: four angle mounting foots 7 of bracket 2 are simultaneously horizontally arranged on the ground.
Heelpiece 6 is lain in a horizontal plane on the ground of the centre of bracket 2.Metal plate 5 is lain in a horizontal plane on heelpiece 6, and thickness sample 4 passes through superposition
Mode is lain in a horizontal plane on metal plate 5.Height adjustment device 1 is mounted on the upper beam of bracket 2, and ground exploring radar antenna 3 is fixed on
On the lower beam of height adjustment device 1.Controller 8 controls the height of the ground exploring radar antenna 3 on height adjustment device 1.
As shown in Figure 2, height adjustment device 1 include fixing bolt 9, upper fixed beam 10, conducting wire 11, antenna fixed beam 12 and
Lower fixed beam 13.Upper fixed beam 10 is fixed on bracket 2 by fixing bolt 9.Conducting wire 12 is gone here and there on the upper beam of bracket 2, is led
Line lower end connects antenna fixed beam 12.Antenna is fixed on lower fixed frame 13.
It is required according to vertification regulation, in conjunction with antenna frequencies, antenna height, ground exploring radar antenna 3 is adjusted by controller 8
Highly, the driving of height adjustment includes electrical, hydraulic etc., can be controlled by remote control, key and manual mode.Metal plate is aluminium conjunction
Golden material, thickness 10.00mm, top surface plane degree ± 0.2mm are horizontally arranged on the ground.Antenna fixed beam 11 is with good grounds not
With the serial mounting hole of brand ground exploring radar antenna structure design.
From the figure 3, it may be seen that thickness sample group is simulation concrete/bituminous pavement design, plastic macromolecule material has been selected
Acrylic (PMMA or organic glass) is made.Acrylic material has preferable chemical stability (dielectric properties stablize) and weather-proof
Property, surface hardness is higher, wear-resistant；Good processing performance, can be used thermoforming or machining mode, and thickness processing is accurate
Degree is high, and convenient for storage.
According to the corresponding relationship of dielectric constant and thickness, the road surface thickness of corresponding (40-500) mm can be covered according to formula (1)
Determination thickness sample group with a thickness of (0-710) mm.
(1)
In formula:
For nominal thickness/mm of thickness sample；
For corresponding road surface thickness/mm(within the scope of (40-500) mm uniform value；
For ground surface material relative dielectric constant, 5 are generally taken；
For the relative dielectric constant of thickness sample.
Thickness sample group includes a series of thickness samples, forms different-thickness using stacked system, specifications parameter is shown in Table
1, the thickness uncertainty of each thickness sample is 0.2mm.
The specifications parameter of 1 thickness sample group of table
| Specification | Quantity | Length/m | Width/m | Height/mm |
| 1 | 7 | 2.0 | 1.0 | 50 |
| 2 | 7 | 1.0 | 1.0 | 50 |
1- height adjustment device；2- bracket；3- ground exploring radar antenna；4- thickness sample；5- metal plate；
6- heelpiece；7- lower margin；8- controller；
The structure diagram of Fig. 1 calibrating installation
9- fixing bolt；The upper fixed beam of 10-；11- conducting wire；12- antenna fixed beam；Fixed beam under 13-；
The structure diagram of Fig. 2 height adjustment device
Unit: mm
A) thickness sample (specification 1)
B) thickness sample (specification 2)
The structure diagram of Fig. 3 thickness sample
Calibrating installation design and test method:
Calibrating installation is department's highest measurement criteria of transportation industry Ground Penetrating Radar, and measuring parameter is thickness.Ground Penetrating Radar pulse
In communication process, when encountering different conductive medium interfaces, the energy of part radar wave can reflect, and encounter metal material
When the overwhelming majority can reflect, therefore the present invention is all made of nonmetallic materials in addition to reflecting plate, and bracket has selected light and hard
Fiber glass epoxy.Thickness sample monolithic quality is about 120kg, and flatness is about ± 0.2mm, and stacking up can guarantee by being self-possessed
Thickness sample group surface is fitted closely with metal plate, then the strong reflection of metal plate is considered as thickness sample group bottom surface.
To horn antenna, ground exploring radar antenna is fixed in antenna hanging beam by when work, is controlled with controller high
Ground exploring radar antenna in degree regulating device moves up and down, and measures distance between antenna and thickness sample group with straight steel ruler, guarantees
Antenna is in optimum measurement distance (generally 300mm-500mm).For the ground coupling antenna, antenna is placed on thickness sample
Calibration is proceeded as described above in group.It when calibration, opens Ground Penetrating Radar and preheats 10 minutes, radar wave is demarcated with the thickness of interior thickness block
Then speed successively measures the thickness sample group thickness from 1-7 block, by the standard for comparing itself and the error judgment radar of standard thickness
Exactness.
Claims (3)
1. a kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation, including height-adjusting knob, height regulating frame,
Antenna hanging beam, bracket, antenna, thickness sample, metal plate, heelpiece and lower margin, it is characterized in that bracket is horizontal positioned by lower margin
On the ground, heelpiece is placed on the ground of the centre of bracket, and metal plate is lain in a horizontal plane on heelpiece, and thickness sample passes through superposition
Mode is horizontal positioned, and height-adjusting knob and height regulating frame are fixed on the crossbeam of bracket on a metal plate, and antenna hanging beam is logical
It crosses and is threadedly secured on the lower beam of height regulating frame, ground exploring radar antenna is threadedly secured in antenna hanging beam, according to
The size of ground exploring radar antenna size and thickness sample group is different and adjusts height.
2. a kind of highway section flaw detection and Laminate construction thickness Ground Penetrating Radar calibrating installation, it is characterized in that material is acrylic, test block
Structure is cuboid, and the size of cuboid test block requires to determine according to actual measurement, and thickness measure uncertainty is ± 0.2mm,
Test block is combined into the thickness sample group of different-thickness by stacked system；It is 1- that thickness sample group, which selects cuboid test block quantity,
20 pieces, any number in 1-20 block is taken according to test thickness.
3. a kind of highway section flaw detection according to claim 1 and Laminate construction thickness Ground Penetrating Radar calibrating installation, feature
It is height regulating frame include that fixing bolt, upper holder, conducting wire, lower fixed frame and antenna fixing holder composition, fixed plate pass through solid
Determine bolt to be fixed on bracket, on fixed frame, antenna is fixed on lower fixed frame conducting wire string；The driving method packet of height adjustment
Include motor, hydraulic, manual；The height adjustment of regulating mechanism passes through automatic or infinite stages manual mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391806.8A CN109946658A (en) | 2017-12-21 | 2017-12-21 | A kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391806.8A CN109946658A (en) | 2017-12-21 | 2017-12-21 | A kind of flaw detection of highway section and Laminate construction thickness Ground Penetrating Radar calibrating installation |
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| CN109946658A true CN109946658A (en) | 2019-06-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878136A (en) * | 2021-03-24 | 2021-06-01 | 合肥工业大学 | Intersection rubber asphalt anti-rutting road surface detection and design method based on ground penetrating radar |
| CN116381821A (en) * | 2023-06-05 | 2023-07-04 | 中国科学院地质与地球物理研究所 | Device and method for indoor verification of detection resolution of ground penetrating radar on complex stratum |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110115666A1 (en) * | 2009-11-17 | 2011-05-19 | Geophysical Survey Systems, Inc. | Highway Speed Ground Penetrating Radar System Utilizing Air-Launched Antenna and Method of Use |
| CN204415467U (en) * | 2015-03-05 | 2015-06-24 | 安徽理工大学 | A kind of geologic radar detection go-cart |
| CN104931943A (en) * | 2015-05-26 | 2015-09-23 | 中公高科养护科技股份有限公司 | Metering method and metering device for ground penetrating radar |
| CN205944376U (en) * | 2016-06-22 | 2017-02-08 | 北京市勘察设计研究院有限公司 | Ground penetrating radar antenna boom elevating gear |
-
2017
- 2017-12-21 CN CN201711391806.8A patent/CN109946658A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110115666A1 (en) * | 2009-11-17 | 2011-05-19 | Geophysical Survey Systems, Inc. | Highway Speed Ground Penetrating Radar System Utilizing Air-Launched Antenna and Method of Use |
| CN204415467U (en) * | 2015-03-05 | 2015-06-24 | 安徽理工大学 | A kind of geologic radar detection go-cart |
| CN104931943A (en) * | 2015-05-26 | 2015-09-23 | 中公高科养护科技股份有限公司 | Metering method and metering device for ground penetrating radar |
| CN205944376U (en) * | 2016-06-22 | 2017-02-08 | 北京市勘察设计研究院有限公司 | Ground penetrating radar antenna boom elevating gear |
Non-Patent Citations (1)
| Title |
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| 郭铁拴 等: "地质雷达技术指标的标定研究", 《地球物理学进展》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878136A (en) * | 2021-03-24 | 2021-06-01 | 合肥工业大学 | Intersection rubber asphalt anti-rutting road surface detection and design method based on ground penetrating radar |
| CN116381821A (en) * | 2023-06-05 | 2023-07-04 | 中国科学院地质与地球物理研究所 | Device and method for indoor verification of detection resolution of ground penetrating radar on complex stratum |
| CN116381821B (en) * | 2023-06-05 | 2023-08-08 | 中国科学院地质与地球物理研究所 | Device and method for indoor verification of detection resolution of ground penetrating radar on complex stratum |
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Application publication date: 20190628 |