CN109212523B - Method and equipment for nondestructive detection of pavement quality by radar - Google Patents
Method and equipment for nondestructive detection of pavement quality by radar Download PDFInfo
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- CN109212523B CN109212523B CN201811065592.XA CN201811065592A CN109212523B CN 109212523 B CN109212523 B CN 109212523B CN 201811065592 A CN201811065592 A CN 201811065592A CN 109212523 B CN109212523 B CN 109212523B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/411—Identification of targets based on measurements of radar reflectivity
- G01S7/412—Identification of targets based on measurements of radar reflectivity based on a comparison between measured values and known or stored values
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
The invention provides a method and equipment for nondestructive detection of pavement quality by a radar, which comprises the following steps of 1) determining the dielectric constant of a pavement layer by a total reflection method; 2) determining the value of the factor in the corresponding void fraction range; 3) establishing an FDTD model of a steel bridge pavement layer, and comparing and analyzing the FDTD model with an actual road surface radar reflected wave oscillogram; 4) detecting the slipping and void part of the steel bridge pavement layer; 5) and establishing quality problem control measures such as thickness, compactness, bottom slippage and void of a steel bridge pavement layer. The method realizes scientific measurement of the thickness of the steel bridge pavement layer based on the pavement radar; determining corresponding shape influence factors mu aiming at different porosity ranges, thereby improving the measuring accuracy of the compactness; the nondestructive detection of cracks of a steel bridge pavement layer and the slippage and void diseases of the bottom of the layer can be realized; the radar nondestructive pavement detection equipment is convenient for installation of the bottom detection radar and the operation table, and data detection is convenient.
Description
Technical Field
The invention relates to the field of steel bridge pavement detection, in particular to a method and equipment for nondestructive detection of pavement quality by a radar.
Background
The steel bridge deck pavement is different from the pavement on the asphalt concrete of a common highway, and is directly paved on an orthotropic steel bridge deck, because the orthotropic steel bridge deck has high flexibility, under the load action of a heavy vehicle, the deck has large local deformation and complex deformation, and obvious stress concentration appears at the joints of welding of stiffening ribs and steel bridge decks and connecting parts of transverse clapboards and the steel bridge decks, so that the stress of a pavement layer is complex and severe, various longitudinal and transverse cracks are caused, surface water enters the pavement layer after the cracks are penetrated, the bonding force between layers is failed, and the pavement layer is damaged by shearing (ruts, embrace, push and the like). The serious water causes the corrosion of the steel box girder to cause the structural damage of the bridge, which leads to serious safety accidents. Meanwhile, the steel bridge pavement layer cannot be fully rolled by a road roller like a common highway asphalt pavement, so that the thickness and the compactness of the pavement layer cannot be fully guaranteed, the pavement layer has insufficient compactness and low strength, and water damage, rutting and other diseases are very easy to occur under the high-temperature and rainy climate conditions in the Chongqing; therefore, the detection of physical indexes and diseases during operation in the construction process of the steel bridge pavement layer is very important; at the same time, the bottom-finding radar also plays a critical role in the measurement if it is better equipped.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method and equipment for nondestructive testing of road surface quality by using a radar, which are convenient for detecting the road surface by using the equipment and can better measure data.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for nondestructive detection of pavement quality by a radar comprises the following steps of 1, determining the dielectric constant of a pavement layer by a total reflection method, calculating the thickness of the pavement layer based on a time course method and verifying the thickness; 2, determining the numerical value of the factor in the corresponding porosity range according to the change rule of the shape influence factor mu in the Behari models with different porosities of the asphalt mixture; 3, establishing an FDTD model of a steel bridge pavement layer, and comparing and analyzing the FDTD model with an actual road surface radar reflected wave oscillogram to realize accurate positioning of the crack position; establishing an FDTD model under two conditions of the steel bridge pavement layer-by-layer bottom void and water immersion, analyzing and researching radar reflected wave oscillograms under the two conditions, comparing and analyzing the radar reflected wave oscillograms with a road surface radar reflected wave oscillogram under the actual condition, and detecting the sliding void part of the steel bridge pavement layer; and 5, establishing quality problem control measures such as thickness, compactness, layer bottom slippage and void of the steel bridge pavement layer.
The invention also provides radar nondestructive pavement detection equipment which comprises a trolley shell and a bottom penetrating radar mounting shell, wherein an inclined plate is fixedly connected on the trolley shell, the upper end of the inclined plate is connected with an operation table mounting shell, the trolley shell is provided with a mounting groove, a pair of slide bars are connected on the inner wall of the mounting groove in parallel, the lower end of the bottom penetrating radar mounting shell is provided with a pair of convex blocks, the convex blocks are provided with slide holes capable of penetrating the slide bars, the slide bars are slidably connected with the slide holes to enable the bottom penetrating radar mounting shell to slide left and right on the slide bars, the right end of the bottom penetrating radar mounting shell is connected with a round bar, the right wall of the mounting groove is provided with a chute, a first spring is arranged in the chute, two ends of the first spring are respectively connected with the round bar and the inner side wall of the chute, the round bar extends into the chute and is matched with the chute, and a second spring is, the utility model discloses a radar installation shell, including the installation groove, the installation groove is equipped with the swash plate, the first spring of the installation groove is equipped with the swash plate, the second spring both ends are connected respectively visit on the outer wall on end radar installation shell right side with installation groove right side wall, first spring with when the second spring is in natural state visit end radar installation shell is located the installation groove intermediate position, be equipped with the operation panel mounting groove on the operation panel installation shell, be equipped with the pushing hands on the swash plate, the circuit passageway is followed the mounting groove passes through the swash plate reachs the operation panel mounting groove, visit end radar of.
Furthermore, a first connecting end is arranged in the line channel, a circular opening with an opening facing right is formed in the right end of the first connecting end, a circular convex rod is arranged in the circular opening, a second connecting end is arranged at the left end of the bottom penetrating radar mounting shell, an elastic telescopic line is wound on the circular convex rod, two ends of the elastic telescopic line are respectively connected with the first connecting end and the second connecting end, the first connecting end is connected with a connecting line located in the line channel, the connecting line is connected with an operating platform mounted in the operating platform mounting groove, the second connecting end is connected with a bottom penetrating radar, and a bottom penetrating radar mounting groove for mounting the bottom penetrating radar is formed in the bottom penetrating radar mounting shell.
Further, be equipped with first through-hole on exploring end radar installation shell, be equipped with the second through-hole on the shallow casing, work as first spring with when the second spring is in natural state first through-hole with the second through-hole corresponds from top to bottom, first through-hole corresponds visit end radar's probe position.
Further, be equipped with the circular spout of round in the shallow casing, circular spout with tangent and the level intercommunication of second through-hole, a pair of walking wheel is installed through the horizontal axis to the shallow casing, be equipped with a circle of tooth on the horizontal axis, the tooth passes through gear drive group and makes with vertical gear drive the gear is rotatory, the montant is connected perpendicularly to the gear, montant horizontally connect connecting rod, connecting rod link block, the slider with circular spout looks adaptation, second through-hole inner wall is equipped with the blind groove, the blind groove with circular spout level corresponds.
Compared with the prior art, the invention has the following beneficial effects: the method realizes scientific measurement of the thickness of the steel bridge pavement layer based on the pavement radar; determining corresponding shape influence factors mu aiming at different porosity ranges, thereby improving the measuring accuracy of the compactness; the nondestructive detection of cracks of a steel bridge pavement layer and the slippage and void diseases of the bottom of the layer can be realized; the method has the advantages that the detection efficiency and the detection precision are improved, the detection cost is reduced, the personal safety of detection personnel is facilitated, a large amount of funds and resources are saved for the country, the popularization and application values are high, and the social benefit and the environmental benefit are also obvious; use simultaneously a radar nondestructive pavement detection equipment to conveniently install the end detection radar visit on the end detection radar installation shell, install the connecting wire in the line passageway, end detection radar and operation panel are visited in the connecting wire connection, utilize the elasticity of first spring and second spring makes equipment play the better protection of cushioning effect and visit end equipment when meetting the collision or accelerating and decelerating suddenly.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a radar nondestructive pavement detection device of the present invention.
Fig. 2 is a schematic structural diagram of the first connection end of the present invention.
Fig. 3 is a schematic view of the transmission inside the shell of the cart according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained by combining the drawings and the detailed implementation mode:
the upper, lower, left and right sides referred to in the present invention are the upper, lower, left and right sides shown in fig. 1.
The invention provides a method for nondestructive detection of pavement quality by a radar, which comprises the following steps,
1, determining the dielectric constant of a pavement layer by a total reflection method, calculating the thickness of the pavement layer based on a time course method, and verifying; the method comprises the steps that a ground penetrating radar antenna is adopted and comprises a transmitting antenna and a receiving antenna, a pavement layer is used for transmitting signals through the transmitting antenna, weak reflection signals are captured and amplified through the receiving antenna, then the weak reflection signals are transmitted to a signal processor, the signals transmitted by the transmitting antenna are sent to be radar waves, the radar waves touch an interface to generate reflection signals, the reflection signals are composed of a series of wave crests, and then the dielectric constant is obtained through reverse deduction according to a simplified formula of a dielectric constant;
2, determining the numerical value of the factor in the corresponding porosity range according to the change rule of the shape influence factor mu in the Behari models with different porosities of the asphalt mixture; according to the gradation, the void ratio, the asphalt viscosity and the loading frequency of the asphalt mixture, calculating each parameter so as to estimate the used factor;
3, establishing an FDTD model of a steel bridge pavement layer, and comparing and analyzing the FDTD model with an actual road surface radar reflected wave oscillogram to realize accurate positioning of the crack position; establishing a three-dimensional model of a target by adopting AutoCAD, calling a VBA program to perform target grid discrete processing adaptive to FDTD calculation, generating a corresponding geometric-waveform parameter description file, and establishing a calculation program interface combining the file and an FDTD solving program, thereby realizing effective, rapid and accurate modeling means and realizing the purpose from target modeling to reflected wave oscillogram;
establishing an FDTD model under two conditions of the steel bridge pavement layer-by-layer bottom void and water immersion, analyzing and researching radar reflected wave oscillograms under the two conditions, comparing and analyzing the radar reflected wave oscillograms with a road surface radar reflected wave oscillogram under the actual condition, and detecting the sliding void part of the steel bridge pavement layer;
and 5, establishing quality problem control measures such as thickness, compactness, layer bottom slippage and void of the steel bridge pavement layer.
As a specific embodiment, forward modeling is carried out on geological radar electromagnetic waves, and a roadbed defect map is preliminarily established; analyzing the characteristic rules of simulated defect maps in various types of geological radar images according to the subgrade defect map to form a typical defect map characteristic library of the railway subgrade simulated geological radar; setting a typical roadbed defect test area, carrying out field test by using geological radar nondestructive testing equipment, and respectively and correspondingly generating a section gray level graph or a waveform graph of the compaction area and the roadbed typical defect test area; according to the typical defect map feature library of the simulated railway roadbed geological radar, carrying out comparative analysis on the section gray level maps or the wave patterns of the generated compaction area and the roadbed defect test area to respectively form a typical defect map feature library of the railway roadbed actual measurement geological radar; and performing rapid nondestructive detection and defect judgment on the actual railway subgrade through the typical defect map feature library of the geological radar.
A radar nondestructive pavement detection device comprises a cart shell 1 and a bottom detection radar mounting shell 2, wherein an inclined plate 3 is fixedly connected to the cart shell 1, an operation table mounting shell 4 is connected to the upper end of the inclined plate 3, a mounting groove 5 is formed in the cart shell 1, a pair of sliding rods 6 are connected to the inner wall of the mounting groove 5 in parallel, a pair of convex blocks 7 are arranged at the lower end of the bottom detection radar mounting shell 2, sliding holes capable of penetrating the sliding rods 6 are formed in the convex blocks 7, the sliding rods 6 are in sliding connection with the sliding holes to enable the bottom detection radar mounting shell 2 to slide left and right on the sliding rods 6, when the bottom detection radar mounting shell 2 is positioned in the middle of the mounting groove 5, the distance between the left end and the right end of the bottom detection radar mounting shell 2 and the left side wall of the mounting groove 5 is 2 cm-5 cm, a round rod 8 is connected to the right end of the bottom detection radar mounting shell, the device is characterized in that a first spring 10 is arranged in the chute 9, two ends of the first spring 10 are respectively connected with the right end of the round rod 8 and the inner side wall of the chute 9, the round rod 8 extends into the chute 9 and is matched with the chute 9, a second spring 11 is wound on the round rod 8, two ends of the second spring 11 are respectively connected with the outer wall on the right side of the bottom-detecting radar mounting shell 2 and the right wall of the mounting groove 5, the bottom-detecting radar mounting shell 2 is positioned in the middle of the mounting groove 5 when the first spring 10 and the second spring 11 are in a natural state, when the device receives collision, the first spring 10 and the second spring 11 are both compressed when the bottom-detecting radar mounting shell 2 slides rightwards, the first spring 10 and the second spring 11 are both stretched when the bottom-detecting radar mounting shell 2 slides leftwards, when the bottom-detecting radar mounting shell 2 is positioned in the middle of the mounting groove 5, first spring 10 and second spring 11 are in natural state, perhaps when equipment receives the collision, when visiting end radar mounting shell 2 and sliding right first spring 10 pulling force reduces second spring 11 pressure increases, visit end radar mounting shell 2 slides left first spring 10 pressure reduces second spring 11 pulling force increases, works as visit end radar mounting hole 2 and is in when mounting groove 5 is middle, the pulling force of first spring 10 equals the pressure of second spring 11, be equipped with operation panel mounting groove 12 on the operation panel mounting shell 4, be equipped with pushing hands 13 on the swash plate 3, through pushing hands 13 pushing equipment, line passageway 14 follows mounting groove 5 passes through swash plate 3 reachs operation panel mounting groove 12, visit end radar installation shell 2 and go up the installation and visit end radar.
As a specific embodiment, an operation button for controlling the bottom-finding radar and a display screen for displaying the bottom-finding radar are provided on the operation table mounted in the operation table mounting groove 12.
As a specific embodiment, in order to avoid winding of a connecting line for connecting an operation table and a bottom-detecting radar, a first connecting end 15 is arranged in the line channel 14, a circular opening with a rightward opening is arranged at the right end of the first connecting end 15, a circular protruding rod 16 is arranged in the circular opening, a second connecting end 18 is arranged at the left end of the bottom-detecting radar installation shell 2, an elastic telescopic line 17 is wound on the circular protruding rod 16, two ends of the elastic telescopic line 17 are respectively connected with the first connecting end 15 and the second connecting end 18, the first connecting end 15 is connected with the connecting line positioned in the line channel 14, the connecting line is connected with the operation table installed in the operation table installation groove 12, the second connecting end 18 is connected with the bottom-detecting radar, a bottom-detecting radar installation groove 19 for installing the bottom-detecting radar is arranged on the bottom-detecting radar installation shell 2, when the bottom-detecting radar installation shell 2 moves leftward, the elastic telescopic wire 17 surrounds the circular convex rod 16, when the bottom penetrating radar mounting shell 2 moves rightwards, the elastic telescopic wire 17 is pulled out from the circular convex rod 16, and the second connecting end 18 corresponds to the middle of the circular convex rod 16.
As a specific embodiment, the console is adapted to the console mounting groove 12, the bottom penetrating radar is adapted to the bottom penetrating radar mounting groove 19, the console is clamped in the console mounting groove 12 for convenient installation and uninstallation, and the bottom penetrating radar is clamped in the bottom penetrating radar mounting groove 19 for convenient installation and uninstallation.
As a specific embodiment, a first through hole 20 is formed in the bottom penetrating radar mounting shell 2, a second through hole 21 is formed in the cart housing 1, when the first spring 10 and the second spring 11 are in a natural state, the first through hole 20 corresponds to the second through hole 21 up and down, the first through hole 20 corresponds to the position of a probe of the bottom penetrating radar, and the probe corresponds to the ground through the first through hole 20 and the second through hole 21.
As a specific embodiment, in order to prevent dust from entering the first through hole 20 from the second through hole 21 and then adhering to the probe, a circle of circular sliding groove 22 is arranged in the cart housing 1, the circular sliding groove 22 is tangent to and horizontally communicated with the second through hole 21, the cart housing 1 is provided with a pair of traveling wheels 23 through a horizontal shaft 24, the horizontal shaft 24 is provided with a circle of teeth, the teeth are driven by a gear transmission set 25 and a vertical gear 26 to rotate the gear 26, the gear 26 is vertically connected with a vertical rod, the vertical rod is horizontally connected with a connecting rod 27, the connecting rod 27 is connected with a sliding block 28, the sliding block 28 is adapted to the circular sliding groove 22, a blind groove 29 is arranged on the inner wall of the second through hole 21, the blind groove 29 horizontally corresponds to the circular sliding groove 22, and when the pushing device is pushed to travel, the horizontal shaft 24 rotates along with, through the transmission of gear drive group 25 makes the montant rotates, drives when the montant rotates slider 28 is in on the horizontal plane circular spout 22 internal rotation, circular spout 22 the center with the montant coincidence, circular spout 22's radius equals connecting rod 27, works as slider 28 is in slide in circular spout 22 drive the circulation of air in the circular spout 22 to adsorb the dust and get into in circular spout 22 or blow in blind groove 29, slider 28 slides away from the second through-hole 21 inner wall just and takes horizontal circulation of air, gear drive group 25 adopts the bevel gear transmission, bevel gear with the tooth interlock is combined and is transmitted power and make the montant set up on the montant finally along the pole footpath level rotation, be equipped with in shallow casing 1 and supply gear drive group 25, horizontal axis 24, A connecting rod 27 and a movable inner cavity of the vertical rod.
As a specific embodiment, roadbed defect test area field test is carried out through geological radar nondestructive testing equipment, detection is carried out along the line direction and the vertical direction and through the centers of various abnormal areas, roadbed radar data are collected for multiple times, and data with the best effect are selected in later-stage radar image processing and are edited.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. An apparatus for use in a method for radar non-destructive testing of pavement quality, characterized by: the device comprises a trolley shell (1) and a bottom detection radar mounting shell (2), wherein an inclined plate (3) is fixedly connected to the trolley shell (1), an operation table mounting shell (4) is connected to the upper end of the inclined plate (3), a mounting groove (5) is formed in the trolley shell (1), a pair of sliding rods (6) is connected to the inner wall of the mounting groove (5) in parallel, a pair of convex blocks (7) is arranged at the lower end of the bottom detection radar mounting shell (2), sliding holes capable of penetrating through the sliding rods (6) are formed in the convex blocks (7), the sliding rods (6) are in sliding connection with the sliding holes to enable the bottom detection radar mounting shell (2) to slide left and right on the sliding rods (6), the right end of the bottom detection radar mounting shell (2) is connected with a round rod (8), a sliding groove (9) is formed in the right wall of the mounting groove (5), a first spring (10) is arranged in the, the utility model discloses a radar detection device, including a first spring (10), a round bar (8), a chute (9), a second spring (11), a first spring (10), a second spring (11), a third spring (10), a third spring (11), a fourth spring (11), a third spring (11), a fourth spring (12), a push handle (13), a line channel (14), a fourth spring (3), a fifth spring (12), a fourth spring (11), a fifth spring (12), a sixth spring (3), a fifth spring (11), a sixth spring (11), a fifth spring (2), a sixth spring, a bottom penetrating radar is arranged on the bottom penetrating radar mounting shell (2);
wherein, the method for the nondestructive detection of the road surface quality by the radar comprises the following steps,
1) determining the dielectric constant of the pavement layer by a total reflection method, calculating the thickness of the pavement layer based on a time course method, and verifying;
2) determining the numerical value of the factor in the corresponding porosity range according to the change rule of the shape influence factor mu in the Behari models with different porosities of the asphalt mixture;
3) establishing an FDTD model of a steel bridge pavement layer, and comparing and analyzing the FDTD model with an actual road surface radar reflected wave oscillogram to realize accurate positioning of the crack position;
4) establishing an FDTD model under two conditions of the steel bridge pavement layer bottom void and water immersion, analyzing and researching radar reflected wave oscillograms under the two conditions, comparing and analyzing the radar reflected wave oscillograms with a road surface radar reflected wave oscillogram under the actual condition, and detecting the sliding void part of the steel bridge pavement layer;
5) and establishing quality problem control measures of the thickness and the compactness of the steel bridge pavement layer and the slippage and the void of the bottom of the layer.
2. The apparatus for use in a method for radar-based nondestructive testing of pavement quality of claim 1 wherein: and performing rapid nondestructive detection and defect judgment on the actual railway subgrade through a typical defect map feature library of the geological radar.
3. The apparatus for use in a method for radar-based nondestructive testing of pavement quality of claim 1 wherein: the method comprises the steps of carrying out site test on a roadbed defect test area through geological radar nondestructive testing equipment, detecting along the line direction and the vertical direction and through the centers of abnormal areas, collecting roadbed radar data for many times, and selecting data with the best effect in later-stage radar image processing for editing.
4. The apparatus for use in a method for radar-based nondestructive testing of pavement quality of claim 1 wherein: the circuit board is characterized in that a first connecting end (15) is arranged in the circuit channel (14), a circular opening with a rightward opening is formed in the right end of the first connecting end (15), a circular convex rod (16) is arranged in the circular opening, a second connecting end (18) is arranged at the left end of the bottom detection radar mounting shell (2), an elastic telescopic wire (17) is wound on the circular convex rod (16), two ends of the elastic telescopic wire (17) are respectively connected with the first connecting end (15) and the second connecting end (18), the first connecting end (15) is connected with a connecting wire located in the circuit channel (14), the connecting wire is connected with an operating table mounted in the operating table mounting groove (12), the second connecting end (18) is connected with a bottom detection radar, and a bottom detection radar mounting groove (19) for mounting the bottom detection radar is formed in the bottom detection radar mounting shell (2).
5. The apparatus for use in a method for radar-based nondestructive testing of pavement quality of claim 1 wherein: be equipped with first through-hole (20) on spy end radar installation shell (2), be equipped with second through-hole (21) on shallow casing (1), work as first spring (10) with when second spring (11) are in natural state first through-hole (20) with second through-hole (21) correspond from top to bottom, first through-hole (20) correspond the probe position of spying end radar.
6. The apparatus for use in a method for radar-based nondestructive testing of road surface quality of claim 5 wherein: be equipped with round circular spout (22) in shallow casing (1), circular spout (22) with second through-hole (21) is tangent and horizontal intercommunication, a pair of walking wheel (23) is installed through horizontal axis (24) in shallow casing (1), be equipped with a circle of tooth on horizontal axis (24), the tooth passes through gear drive group (25) and makes with vertical gear (26) transmission gear (26) are rotatory, the montant is connected perpendicularly in gear (26), montant horizontally connect connecting rod (27), connecting rod (27) link block (28), slider (28) with circular spout (22) looks adaptation, second through-hole (21) inner wall is equipped with blind groove (29), blind groove (29) with circular spout (22) level corresponds.
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| CN111025286B (en) * | 2019-11-01 | 2021-08-24 | 长安大学 | Ground penetrating radar map self-adaptive selection method for water damage detection |
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| 基于电磁波技术的沥青混凝土路面无损探测技术研究;杨冲;《万方学术期刊数据库》;20121225;第2章第2.2.4节，第2.2.5节，图2.12，2.13，第4章第4.6节，第6章第6.3.2.2节，图6.10-6.13，第7章第7.2.1节 * |
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