CN111648206A - Real-time paving auxiliary monitoring system for asphalt pavement - Google Patents

Real-time paving auxiliary monitoring system for asphalt pavement Download PDF

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Publication number
CN111648206A
CN111648206A CN202010318909.7A CN202010318909A CN111648206A CN 111648206 A CN111648206 A CN 111648206A CN 202010318909 A CN202010318909 A CN 202010318909A CN 111648206 A CN111648206 A CN 111648206A
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echo signal
radar
thickness
module
paving
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CN111648206B (en
Inventor
张开宇
王彦炜
宋超
陈永长
张锐敏
郝明锋
兰珊
吴晓俊
周轶群
杨维彬
曲凯元
张帅
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CSCEC Road and Bridge Group Co Ltd
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CSCEC Road and Bridge Group Co Ltd
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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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
    • 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention discloses an auxiliary monitoring system for real-time paving of an asphalt pavement, which relates to the field of municipal traffic and comprises the following components: the real-time monitoring module is used for acquiring videos of asphalt paving operation in real time and uploading the videos to the background server; the pre-laying module is used for pre-laying asphalt on the road surface; the laying thickness of the pre-laying operation is an engineering design value; the thickness detection module is used for carrying out thickness inspection on the asphalt pavement which is subjected to real-time pre-paving operation to obtain the pre-paving actual thickness of the asphalt pavement; the paving correction module is used for comparing the difference between the pre-paving actual thickness detected by the thickness detection module and the engineering design value and thinning or thickening the asphalt pavement subjected to real-time pre-paving operation; the invention can effectively measure the thickness of the asphalt pavement in real time, realize the auxiliary monitoring and real-time paving of the asphalt and has high thickness solving accuracy.

Description

Real-time paving auxiliary monitoring system for asphalt pavement
Technical Field
The invention relates to the field of municipal traffic, in particular to an auxiliary monitoring system for real-time paving of an asphalt pavement.
Background
In the early days, the thickness of the road pavement was generally detected by a core drilling and sampling method, which is more conventional. The core drilling and sampling on the road surface not only has certain danger during sampling, but also easily damages the road surface structure after sampling, easily damages the integrity and the aesthetic property of the road surface structure layer, and has great limitation.
The ground penetrating radar is a novel detection device, is gradually valued by people in the actual application of road engineering, and is widely applied. The ground penetrating radar has the working principle that high-frequency electromagnetic waves are transmitted downwards through a road surface, the receiving antenna receives the electromagnetic waves returned to the road surface, the electromagnetic waves penetrate through different medium layers underground, the characteristics of waveform, amplitude change conditions and the like of the electromagnetic waves are received through an electrical property difference to infer the space state and the structural form of the medium, and finally detected data of the thickness of the road surface and the deflection of the road surface are obtained. The ground penetrating radar detects the detected road surface by utilizing the functions of high resolution and high detection speed, such as modern electronic technology, information technology, high-end advanced technology of electromagnetic technology and the like, and is widely applied to many practical projects and achieves good results. The method has the advantages of representing high standards of rapidness, effectiveness and no damage in the detection process of the expressway, and being very suitable for detecting pavement parameters and related track diseases during the construction period and the operation management period of the asphalt expressway.
The reflection coefficient method is a common method for detecting the thickness of a road surface, but in the prior art, the method is often inaccurate in measurement accuracy and needs to be corrected.
In addition, in the prior art, the thickness of the asphalt on the road surface is detected after the construction is completed, so that rework is required again when the laying thickness is not accurate.
Disclosure of Invention
In view of some defects of the prior art, namely, on one hand, the thickness of the asphalt in the prior art is detected after the construction is finished, so that reworking is needed again when the laying thickness is not accurate; on the other hand, when the refraction and reflection of radar emission signals are considered in the process of detecting the road thickness by using the traditional reflection coefficient method, the fact that secondary echo signals which are reflected for multiple times in a road and cause multiple reflections are taken as primary echo signals and substituted into the solution of the reflectivity of a dielectric layer and the measurement of the road surface thickness is not considered, and therefore the overall measurement data are inaccurate; the invention aims to solve the technical problem of providing a device for detecting the paving thickness of an asphalt pavement, and aims to analyze whether a radar echo signal is a primary echo signal or a secondary echo signal, eliminate the secondary echo signal, solve the reflectivity of each medium interface through the primary echo signal and further solve the reflectivity to obtain the accurate pavement thickness.
In order to achieve the above object, the present invention provides an auxiliary monitoring system for real-time paving of an asphalt pavement, the system comprising:
the real-time monitoring module is used for acquiring videos of asphalt paving operation in real time and uploading the videos to the background server;
the pre-laying module is used for pre-laying asphalt on the road surface; the laying thickness of the pre-laying operation is an engineering design value;
the thickness detection module is used for carrying out thickness inspection on the asphalt pavement which is subjected to real-time pre-paving operation to obtain the pre-paving actual thickness of the asphalt pavement;
the paving correction module is used for comparing the difference between the pre-paving actual thickness detected by the thickness detection module and the engineering design value and thinning or thickening the asphalt pavement subjected to real-time pre-paving operation;
thickness detects module includes: the device comprises a radar transmitting and receiving module, an interface reflectivity solving module, a dielectric constant solving module, a dielectric layer thickness solving module and a primary echo signal determining module;
the radar transmitting and receiving module is used for sending a first radar signal to a road surface and collecting each radar echo signal AiAnd respective radar echo signals AiA reception duration t relative to the first radar signali(ii) a The initial amplitude of the first radar signal is A0(ii) a The i is an echo number of the radar echo signal, and is 1, 2. The radar echo signal AiIncluding a primary echo signal BjAnd a secondary echo signal; the primary echo signal BjTransmitting the first radar signal on the asphalt pavement until the first radar signal is reflected on a jth medium interface and directly transmits the radar return signal A of the asphalt pavementi(ii) a Wherein the round-trip period of each of the dielectric layers is TjSaid
Figure BDA0002460588190000031
The j is 1, a., m, and m is the current maximum number of the primary echo signal; the above-mentioned
Figure BDA0002460588190000032
For the primary echo signal BjA receive duration relative to the first radar signal; wherein, B0＝A1，B1＝A2，T1＝t2-t1；
The interface reflectivity solving module is used for solving the interface reflectivity according to the determined primary echo signal BjSolving the reflectivity R of the jth medium interfacej(ii) a Wherein the reflectivity
Figure BDA0002460588190000041
RjIs the reflectivity of the medium interface between the air layer and the road surface
Figure BDA0002460588190000042
The dielectric constant solving module is used for solving the dielectric constant according to the reflectivity RjAnd the dielectric constant of the j-th dielectric layerjAnd solving the dielectric constant of the j +1 th dielectric layerj+1(ii) a Wherein, the
Figure BDA0002460588190000043
0Is the dielectric constant of the air layer;
the medium layer thickness solving module is used for solving the problem that the round-trip period of the medium layer is TjThe dielectric constant of the j dielectric layerjAnd solving the layer thickness H of the j-th dielectric layerj(ii) a Wherein the layer is thick
Figure BDA0002460588190000044
C is the speed of light;
the primary echo signal determining module is used for acquiring the radar echo signal A which is not determined to be the primary echo signaliJudging the radar echo signal AiWhether or not to match each of the determined primary echo signals BjIf the two-time echo signals are matched, solving the estimated value of the two-time echo, and obtaining the radar echo signal AiThe difference value of the secondary echo estimated value is used as a new primary echo signal Bj+1。
According to the technical scheme, asphalt is pre-paved, then the thickness of the asphalt is detected, and the asphalt pavement is thinned and thickened according to the thickness condition of the asphalt, so that the real-time paving of the asphalt pavement is realized, and the accuracy of the asphalt paving thickness is improved; in the technical scheme, the thickness of the road surface is solved by adopting an improved reflection coefficient method, and the accuracy is higher compared with the prior art; judging whether the radar echo signal is a secondary echo signal formed by the known round-trip reflection of a primary echo signal in the medium layer or not in time according to the round-trip period of each medium layer, further estimating whether the numerical values of the secondary echo signal are matched or not, and deducting the estimated numerical value of the secondary echo signal from the radar signal to obtain a corresponding primary echo signal when the radar echo signal is not matched; on the whole, the influence of the secondary echo signal on the pavement thickness detection can be eliminated by adopting an improved reflection coefficient method, and the pavement detection precision is improved.
In a specific embodiment, the primary echo signal determination module includes:
a time matching judgment unit for obtaining the radar echo signal A which is not determined to be the primary echo signaliFrom each determined primary echo signal BjAnd said round trip period TjDetermine whether there is
Figure BDA0002460588190000051
Such that the radar echo signal AiIs received for a time period tiCan satisfy the following conditions:
Figure BDA0002460588190000052
wherein, the
Figure BDA0002460588190000053
Said K(x,j)Representing the radar echo signal AiThe number of round-trip reflections in the dielectric layer of the jth layer; the { K(x,1),...,K(x,j),...,K(x,m)Each item of the is a non-negative integer and at least one item is a positive integer;
a first determination unit for determining whether the first determination unit is a first determination unit
Figure BDA0002460588190000054
If not, increasing whether the undetermined value is the valueThe radar echo signal A of the primary echo signaliIs a primary echo signal Bj+1Determining said primary echo signal Bj+1A receive duration relative to the first radar signal
Figure BDA0002460588190000055
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure BDA0002460588190000056
A secondary echo estimation unit for estimating the echo of the echo signal
Figure BDA0002460588190000057
If so, acquiring the data satisfying the
Figure BDA0002460588190000061
Is/are as follows
Figure BDA0002460588190000062
Corresponding primary echo signal BxSolving the secondary echo estimation value
Figure BDA0002460588190000063
A second decision unit for responding to the radar echo signal AiAnd the above-mentioned
Figure BDA0002460588190000064
Matching, then the radar echo signal AiAdding a primary echo signal for the secondary echo signal, otherwise
Figure BDA0002460588190000065
Determining the primary echo signal Bj+1A receive duration relative to the first radar signal
Figure BDA0002460588190000066
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure BDA0002460588190000067
Wherein, the
Figure BDA0002460588190000068
The above-mentioned
Figure BDA0002460588190000069
In one embodiment, if there are multiple sets
Figure BDA00024605881900000610
So that t isiSatisfies the following conditions:
Figure BDA00024605881900000611
the secondary echo estimation value
Figure BDA00024605881900000612
Is a plurality of groups
Figure BDA00024605881900000613
Warp beam
Figure BDA00024605881900000614
And (4) summing the operations.
In one embodiment, the radar echo signal AiAnd the above-mentioned
Figure BDA00024605881900000615
The matching means that: the above-mentioned
Figure BDA00024605881900000616
The content of the organic solvent is not less than 1 and not more than α and not more than 1.05.
In one embodiment, the thickness detection module further includes:
a section thickness structure generation module for generating a section thickness structure according to the layer thickness H of each dielectric layerjAnd generating a section thickness structure of the asphalt pavement.
In a specific embodiment, the thickness detection module is further configured to detect a thickness H of each of the dielectric layers according to a thickness of the dielectric layerjA medium for storing a chemicalElectric constantjAnd the preset range of the asphalt pavement is obtained, and the thickness of the asphalt pavement is obtained.
The invention has the beneficial effects that: 1) firstly, pre-paving asphalt, then detecting the thickness of the asphalt, and thinning and thickening the asphalt pavement according to the thickness condition of the asphalt, so that the real-time paving of the asphalt pavement is realized, and the accuracy of the asphalt paving thickness is improved; 2) the thickness of the pavement is solved by adopting an improved reflection coefficient method, and the accuracy is higher compared with the prior art; judging whether the radar echo signal is a secondary echo signal formed by the known round-trip reflection of a primary echo signal in the medium layer or not in time according to the round-trip period of each medium layer, further estimating whether the numerical values of the secondary echo signal are matched or not, and deducting the estimated numerical value of the secondary echo signal from the radar signal to obtain a corresponding primary echo signal when the radar echo signal is not matched; on the whole, the influence of the secondary echo signal on the pavement thickness detection can be eliminated by adopting an improved reflection coefficient method, and the pavement detection precision is improved.
Drawings
Fig. 1 is a system block diagram of an auxiliary monitoring system for real-time paving of an asphalt pavement according to an embodiment of the present invention;
fig. 2 is a block diagram of a primary echo signal determining module of an asphalt pavement real-time paving auxiliary monitoring system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a real-time paving auxiliary monitoring system for an asphalt pavement according to an embodiment of the present invention;
fig. 4 is a flowchart of asphalt thickness detection of an asphalt pavement real-time paving auxiliary monitoring system according to an embodiment of the present invention;
fig. 5 is a radar propagation path diagram of an asphalt pavement real-time paving auxiliary monitoring system according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an exemplary multi-modal listing of homogeneous secondary echo signals in accordance with one embodiment of the present invention;
fig. 7 is another radar propagation path diagram of a real-time paving auxiliary monitoring system for an asphalt pavement according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in the actual asphalt pavement thickness detection process, a reflection coefficient method is often adopted to solve the emissivity, the dielectric constant and the pavement thickness of the pavement layer by layer; however, in this process, the reflection and refraction of different layers have a superposition effect, and an invisible reflection signal may be reflected multiple times in one medium layer, so that multiple secondary echoes are doped in the radar echo, and in the solving process, the secondary echo signals are solved as primary echo signals, so that the number of layers of the road surface is increased intangibly in the actual solving process, and the solving result has errors or errors.
It is worth mentioning that, in the present invention, the radar signal is reflected once at the bottom layer, and enters and exits twice at each layer, and the signal received as radar echo is called a primary echo signal; and the radar echo which is reflected for many times in the medium layer of the road surface is a secondary echo signal.
Therefore, in the invention, the primary echo signal with higher purity is obtained by removing and deducting the secondary echo signal, so that the obtained road surface thickness information is more accurate.
As shown in fig. 1 to 7, in a first embodiment of the present invention, an auxiliary monitoring system for real-time paving of an asphalt pavement is provided, including:
the real-time monitoring module 100 is used for acquiring videos of asphalt paving operation in real time and uploading the videos to the background server;
the pre-paving module 200 is used for pre-paving asphalt on a road surface; the laying thickness of the pre-laying operation is an engineering design value;
the thickness detection module 300 is used for performing thickness inspection on the asphalt pavement subjected to real-time pre-paving operation to obtain the pre-paving actual thickness of the asphalt pavement;
the paving correction module 400 is used for comparing the difference between the pre-paving actual thickness detected by the thickness detection module 300 and the engineering design value, and thinning or thickening the asphalt pavement which is subjected to real-time pre-paving operation;
the thickness detection module 300 includes: the system comprises a radar transmitting and receiving module 310, an interface reflectivity solving module 320, a dielectric constant solving module 330, a dielectric layer thickness solving module 340 and a primary echo signal determining module 350;
the radar transmitting and receiving module 310 is configured to send a first radar signal to a road surface and collect each radar echo signal aiAnd respective radar echo signals AiA reception duration t relative to the first radar signali(ii) a The initial amplitude of the first radar signal is A0(ii) a The i is an echo number of the radar echo signal, and is 1, 2. The radar echo signal AiIncluding a primary echo signal BjAnd a secondary echo signal; the primary echo signal BjTransmitting the first radar signal on the asphalt pavement until the first radar signal is reflected on a jth medium interface and directly transmits the radar return signal A of the asphalt pavementi(ii) a Wherein the round-trip period of each of the dielectric layers is TjSaid
Figure BDA0002460588190000091
The j is 1, a., m, and m is the current maximum number of the primary echo signal; the above-mentioned
Figure BDA0002460588190000101
For the primary echo signal BjA receive duration relative to the first radar signal; wherein, B0＝A1，B1＝A2，T1＝t2-t1；
The interface reflectivity solving module 320 is used for solving the primary echo signal B according to the determined primary echo signal BjSolving the reflectivity R of the jth medium interfacej(ii) a Wherein the reflectivity
Figure BDA0002460588190000102
RjIs the reflectivity of the medium interface between the air layer and the road surface
Figure BDA0002460588190000103
The dielectric constant solving module 330 is used for solving the reflectivity R according to the reflectivityjAnd the dielectric constant of the j-th dielectric layerjAnd solving the dielectric constant of the j +1 th dielectric layerj+1(ii) a Wherein, the
Figure BDA0002460588190000104
0Is the dielectric constant of the air layer;
the dielectric layer thickness solving module 340 is configured to solve the round trip period of the dielectric layer as TjThe dielectric constant of the j dielectric layerjAnd solving the layer thickness H of the j-th dielectric layerj(ii) a Wherein the layer is thick
Figure BDA0002460588190000105
C is the speed of light;
the primary echo signal determining module 350 is configured to obtain the radar echo signal a that is not determined to be the primary echo signaliJudging the radar echo signal AiWhether or not to match each of the determined primary echo signals BjIf the two-time echo signals are matched, solving the estimated value of the two-time echo, and obtaining the radar echo signal AiThe difference value of the secondary echo estimated value is used as a new primary echo signal Bj+1。
In this embodiment, the primary echo signal determining module 350 includes:
a time matching judgment unit 351 for acquiring the radar echo signal A that is not determined to be the primary echo signaliFrom each determined primary echo signal BjAnd said round trip period TjIs judged to beAbsence or presence of
Figure BDA0002460588190000111
Such that the radar echo signal AiIs received for a time period tiCan satisfy the following conditions:
Figure BDA0002460588190000112
wherein, the
Figure BDA0002460588190000113
Said K(x,j)Representing the radar echo signal AiThe number of round-trip reflections in the dielectric layer of the jth layer; the { K(x,1),...,K(x,j),...,K(x,m)Each item of the is a non-negative integer and at least one item is a positive integer;
a first decision unit 352 for deciding whether the above
Figure BDA0002460588190000114
If not, increasing the radar echo signal A which is not determined to be the primary echo signaliIs a primary echo signal Bj+1Determining said primary echo signal Bj+1A receive duration relative to the first radar signal
Figure BDA0002460588190000115
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure BDA0002460588190000116
A secondary echo estimation unit 353 for estimating the secondary echo
Figure BDA0002460588190000117
If so, acquiring the data satisfying the
Figure BDA0002460588190000118
Is/are as follows
Figure BDA0002460588190000119
Corresponding primary echo signal BxSolving the secondary echo estimation value
Figure BDA00024605881900001110
A second decision unit 354 for responding to the radar echo signal AiAnd the above-mentioned
Figure BDA00024605881900001111
Matching, then the radar echo signal AiAdding a primary echo signal for the secondary echo signal, otherwise
Figure BDA0002460588190000121
Determining the primary echo signal Bj+1A receive duration relative to the first radar signal
Figure BDA0002460588190000122
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure BDA0002460588190000123
Wherein, the
Figure BDA0002460588190000124
The above-mentioned
Figure BDA0002460588190000125
In this embodiment, if there are multiple sets
Figure BDA0002460588190000126
So that t isiSatisfies the following conditions:
Figure BDA0002460588190000127
the secondary echo estimation value
Figure BDA0002460588190000128
Is a plurality of groups
Figure BDA0002460588190000129
Warp beam
Figure BDA00024605881900001210
And (4) summing the operations.
In the present embodiment, the radar echo signal aiAnd the above-mentioned
Figure BDA00024605881900001211
The matching means that: the above-mentioned
Figure BDA00024605881900001212
The content of the organic solvent is not less than 1 and not more than α and not more than 1.05.
In this embodiment, the thickness detection module 300 further includes:
a profile thickness structure generating module 360 for generating a profile thickness structure according to the layer thickness H of each of the dielectric layersjAnd generating a section thickness structure of the asphalt pavement.
In this embodiment, the thickness detection module 300 is further configured to detect the thickness H of each dielectric layerjDielectric constant ofjAnd the preset range of the asphalt pavement is obtained, and the thickness of the asphalt pavement is obtained.
In the present embodiment, the thickness H of each dielectric layer is determined according to the thickness of the dielectric layerjDielectric constant ofjAnd the preset range of the asphalt pavement is obtained, and the thickness of the asphalt pavement is obtained.
It should be noted that, in the figure, for the sake of simplicity, the lines are avoided from being disordered, the angle relationship between the incident angle and the refraction angle is not considered, and the line segment where the incident angle and the refraction angle are located is directly represented by a straight line; in practical application, the detection radar is approximately vertical incidence, and the angle difference between the incident angle and the refraction angle is small and can be approximately ignored; in addition, if the incident ray is directly perpendicular to the road surface, the reflected ray and the incident ray are directly overlapped, so that the explanation of the application is inconvenient, and the explanation is made by oblique incidence.
As shown in FIG. 5, the current radar return signals have 10 groups of data (A)1-A10) Wherein A is1、A2、A4、A7Are primary echo signals, respectively denoted as B0、B1、B2、B3；A3、A5、A8、A9Is B1The secondary echo of (2); a. the6Is B1、B2A superimposed secondary echo; a. the10Is B2The secondary echo of (2).
The following is a derivation description of the correlation formula in the present invention.
As in fig. 5, from the optical properties:
Figure BDA0002460588190000131
i.e. B0＝A0R0；
In the same way, A0(1-R0)R1(1+R0)＝B1；
A0(1-R0)(1-R1)R2(1+R0)(1+R1)＝B2；
Recursion can give: reflectivity of light
Figure BDA0002460588190000132
For the formula
Figure BDA0002460588190000133
The physical meaning is: echo signal AiIs received at time tiWith the previous primary echo signal BxWhether the time difference between is the round trip period TjIntegral multiple of (A), if so, echo signal AiPossibly a secondary echo signal;
at the moment, it is necessary to pass
Figure BDA0002460588190000134
To judge the echo signal AiIf the amplitude is equal to the amplitude, the echo signal A is obtainediThe two signals are pure secondary echo signals, and when the two signals are not equal, the two signals only differ into primary echo signals.
Wherein the content of the first and second substances,
Figure BDA0002460588190000141
in the actual case, when satisfied in time:
Figure BDA0002460588190000142
then means AiTwice more in the first layer, once more in the second layer, and once more in the third layer;
Figure BDA0002460588190000143
as its 12 cases are given in fig. 6; at this time, the echo components in 12 are actually homologous (as in B)x) (ii) a While in other cases the echo signals may not be homologous, as in the case given in figure 7, a4Corresponding echo estimation value
Figure BDA0002460588190000144
The two component quantities need to be solved for superposition, i.e.,
Figure BDA0002460588190000145
the foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (6)

1. The utility model provides a real-time supplementary monitoring system that paves of bituminous paving which characterized in that, the system includes:
the real-time monitoring module is used for acquiring videos of asphalt paving operation in real time and uploading the videos to the background server;
the pre-laying module is used for pre-laying asphalt on the road surface; the laying thickness of the pre-laying operation is an engineering design value;
the thickness detection module is used for carrying out thickness inspection on the asphalt pavement which is subjected to real-time pre-paving operation to obtain the pre-paving actual thickness of the asphalt pavement;
the paving correction module is used for comparing the difference between the pre-paving actual thickness detected by the thickness detection module and the engineering design value and thinning or thickening the asphalt pavement subjected to real-time pre-paving operation;
thickness detects module includes: the device comprises a radar transmitting and receiving module, an interface reflectivity solving module, a dielectric constant solving module, a dielectric layer thickness solving module and a primary echo signal determining module;
the radar transmitting and receiving module is used for sending a first radar signal to a road surface and collecting each radar echo signal AiAnd respective radar echo signals AiA reception duration t relative to the first radar signali(ii) a The initial amplitude of the first radar signal is A0(ii) a The i is an echo number of the radar echo signal, and is 1, 2. The radar echo signal AiIncluding a primary echo signal BjAnd a secondary echo signal; the primary echo signal BjTransmitting the first radar signal on the asphalt pavement until the first radar signal is reflected on a jth medium interface and directly transmits the radar return signal A of the asphalt pavementi(ii) a Wherein the round-trip period of each of the dielectric layers is TjSaid
Figure FDA0002460588180000021
The j is 1, a., m, and m is the current maximum number of the primary echo signal; the above-mentioned
Figure FDA0002460588180000022
For the primary echo signal BjA receive duration relative to the first radar signal; wherein, B0＝A1，B1＝A2，T1＝t2-t1；
The interface reflectivity solving module is used for solving the interface reflectivity according to the determined interface reflectivityPrimary echo signal BjSolving the reflectivity R of the jth medium interfacej(ii) a Wherein the reflectivity
Figure FDA0002460588180000023
RjIs the reflectivity of the medium interface between the air layer and the road surface
Figure FDA0002460588180000024
The dielectric constant solving module is used for solving the dielectric constant according to the reflectivity RjAnd the dielectric constant of the j-th dielectric layerjAnd solving the dielectric constant of the j +1 th dielectric layerj+1(ii) a Wherein, the
Figure FDA0002460588180000025
0Is the dielectric constant of the air layer;
the medium layer thickness solving module is used for solving the problem that the round-trip period of the medium layer is TjThe dielectric constant of the j dielectric layerjAnd solving the layer thickness H of the j-th dielectric layerj(ii) a Wherein the layer is thick
Figure FDA0002460588180000026
C is the speed of light;
the primary echo signal determining module is used for acquiring the radar echo signal A which is not determined to be the primary echo signaliJudging the radar echo signal AiWhether or not to match each of the determined primary echo signals BjIf the two-time echo signals are matched, solving the estimated value of the two-time echo, and obtaining the radar echo signal AiThe difference value of the secondary echo estimated value is used as a new primary echo signal Bj+1。
2. The system for auxiliary monitoring of real-time paving of asphalt pavement according to claim 1, wherein the primary echo signal determining module comprises:
a time matching judgment unit for obtaining the radar echo signal A which is not determined to be the primary echo signaliFrom each determined primary echo signal BjAnd said round trip period TjDetermine whether there is
Figure FDA0002460588180000031
Such that the radar echo signal AiIs received for a time period tiCan satisfy the following conditions:
Figure FDA0002460588180000032
wherein, the
Figure FDA0002460588180000033
Said K(x,j)Representing the radar echo signal AiThe number of round-trip reflections in the dielectric layer of the jth layer; the { K(x,1),...,K(x,j),...,K(x,m)Each item of the is a non-negative integer and at least one item is a positive integer;
a first determination unit for determining whether the first determination unit is a first determination unit
Figure FDA0002460588180000034
If not, increasing the radar echo signal A which is not determined to be the primary echo signaliIs a primary echo signal Bj+1Determining said primary echo signal Bj+1A receive duration relative to the first radar signal
Figure FDA0002460588180000035
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure FDA0002460588180000036
A secondary echo estimation unit for estimating the echo of the echo signal
Figure FDA0002460588180000037
The requirements are met,then the acquisition satisfies the
Figure FDA0002460588180000038
Is/are as follows
Figure FDA0002460588180000039
Corresponding primary echo signal BxSolving the secondary echo estimation value
Figure FDA0002460588180000041
A second decision unit for responding to the radar echo signal AiAnd the above-mentioned
Figure FDA0002460588180000042
Matching, then the radar echo signal AiAdding a primary echo signal for the secondary echo signal, otherwise
Figure FDA0002460588180000043
Determining the primary echo signal Bj+1A receive duration relative to the first radar signal
Figure FDA0002460588180000044
Determining a round trip period of the dielectric layer of the (j + 1) th layer
Figure FDA0002460588180000045
Wherein, the
Figure FDA0002460588180000046
The above-mentioned
Figure FDA0002460588180000047
3. The system as claimed in claim 2, wherein if there are multiple sets of said auxiliary monitoring system for real-time paving of asphalt pavement
Figure FDA0002460588180000048
So that t isiSatisfies the following conditions:
Figure FDA0002460588180000049
the secondary echo estimation value
Figure FDA00024605881800000410
Is a plurality of groups
Figure FDA00024605881800000411
Warp beam
Figure FDA00024605881800000412
And (4) summing the operations.
4. The system for auxiliary monitoring of real-time paving of asphalt pavement according to claim 1, wherein the radar echo signal aiAnd the above-mentioned
Figure FDA00024605881800000413
The matching means that: the above-mentioned
Figure FDA00024605881800000414
The content of the organic solvent is not less than 1 and not more than α and not more than 1.05.
5. The system as claimed in claim 1, wherein the thickness detection module further comprises:
a section thickness structure generation module for generating a section thickness structure according to the layer thickness H of each dielectric layerjAnd generating a section thickness structure of the asphalt pavement.
6. The system for auxiliary monitoring of real-time paving of asphalt pavement according to claim 1, wherein the thickness detection module is further configured to detect the thickness H of each of the media layersjDielectric constant ofjAnd a preset range of the asphalt pavementAnd obtaining the thickness of the asphalt pavement.
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