A method and device for detecting the size of road diseases based on ground penetrating radar

Abstract

The present invention discloses a method and device for detecting the size of road diseases based on ground penetrating radar. The method includes respectively obtaining the relative dielectric constants of the surface layer, base layer and subgrade material of the target road; calculating the dielectric influence factor of the disease based on the position, relative dielectric constant, operating parameters and structural parameters of the ground penetrating radar of the disease detected in the target road; calculating the first critical size and the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar; and determining the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the change relationship of the reflected wave electric field intensity of the electromagnetic wave of the ground penetrating radar with the horizontal size of the disease. It realizes the inverse deduction of the road disease size based on the electric field intensity of the reflected wave of the ground penetrating radar electromagnetic wave, provides data support for formulating reasonable and effective road maintenance and repair plans, thereby improving the repair efficiency of road diseases and ensuring the safety and smoothness of road traffic.

Description

Technical Field

[0001] The present application relates to the technical field of road disease detection, and specifically relates to a method and device for detecting the size of road diseases based on ground penetrating radar. Background Art

[0002] As the infrastructure of the transportation system, the road structure mainly includes three structural layers from top to bottom: the surface layer, the base layer, and the subgrade. Among them, the surface layer and the base layer together constitute the road surface structure. Under the combined influence of long-term traffic loads and complex and changeable environmental factors, various types of diseases such as cracks, looseness, and voids often occur inside the roadbed and pavement. The existence of these diseases not only seriously damages the durability and driving safety of the road, but also poses a potential threat to the smooth operation of road traffic.

[0003] To address these problems, it is particularly important to timely and accurately obtain the size information of road diseases. By accurately measuring the size of diseases, the severity of diseases and their impact on the structural safety of the road can be more scientifically evaluated, so as to formulate more reasonable and effective maintenance and repair plans.

[0004] Therefore, how to quickly detect the size of road diseases is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The present application provides a method and device for detecting the size of road diseases based on ground penetrating radar, which can quickly detect the size of road diseases based on ground penetrating radar and provide data support for formulating reasonable and effective road maintenance and repair plans.

[0006] In a first aspect, an embodiment of the present application provides a method for detecting the size of road diseases based on ground penetrating radar. The method for detecting the size of road diseases based on ground penetrating radar includes:

[0007] Obtain the relative dielectric constants of the surface layer, the base layer, and the subgrade materials of the target road respectively;

[0008] Based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and the structural parameters of the ground penetrating radar, calculate the dielectric influence factor of the disease;

[0009] According to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar, calculate the first critical size and the second critical size of the disease;

[0010] According to the relationship between the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave and the horizontal size of the disease, determine the size relationship between the horizontal size of the disease and the first critical size and the second critical size.

[0011] In combination with the first aspect, in one embodiment, the operating parameters of the ground penetrating radar include the center frequency of the electromagnetic wave of the ground penetrating radar, and the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar. Calculating the dielectric influence factor of the disease in the target road based on the position of the disease detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and the structural parameters of the ground penetrating radar includes:

[0012] If the disease is in the surface layer, calculate the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0013]

[0014] Wherein, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

[0015] In one embodiment, calculating the dielectric influence factor of the disease based on the position of the disease detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and the structural parameters of the ground penetrating radar further includes:

[0016] If the disease is in the base layer, calculate the dielectric influence factor of the base layer disease according to the thickness of the surface layer, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0017]

[0018] Wherein, is the dielectric influence factor of the base layer disease, is the thickness of the surface layer, is the relative dielectric constant of the base layer material.

[0019] In one embodiment, calculating the dielectric influence factor of the disease based on the position of the disease detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and the structural parameters of the ground penetrating radar further includes:

[0020] If the disease is in the subgrade, calculate the dielectric influence factor of the subgrade disease according to the thickness of the base course, the thickness of the surface course, the relative dielectric constant of the subgrade material, the relative dielectric constant of the base course material, the relative dielectric constant of the surface course material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface course, and the speed of light in vacuum:

[0021]

[0022] Wherein, is the dielectric influence factor of the subgrade disease, is the thickness of the base course, is the relative dielectric constant of the subgrade material.

[0023] In one embodiment, calculate the first critical dimension of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar, including:

[0024] Calculate the first critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0025]

[0026] Wherein, is the first critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface course.

[0027] In one embodiment, calculate the second critical dimension of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar, including:

[0028] Calculate the second critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0029]

[0030] Wherein, is the second critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface course.

[0031] In one embodiment, according to the relationship between the electric field strength of the reflected wave of the ground penetrating radar electromagnetic wave and the horizontal dimension of the disease level, determining the size relationship between the horizontal dimension of the disease and the first critical dimension and the second critical dimension includes:

[0032] If the horizontal dimension of the disease increases synchronously with the electric field strength of the reflected wave, it is determined that the horizontal dimension of the disease is smaller than the first critical dimension;

[0033] If the electric field strength of the reflected wave decreases synchronously as the horizontal dimension of the disease increases, it is determined that the horizontal dimension of the disease is greater than or equal to the first critical dimension and less than or equal to the second critical dimension;

[0034] If the electric field strength of the reflected wave remains unchanged as the horizontal dimension of the disease increases, it is determined that the horizontal dimension of the disease is greater than the second critical dimension.

[0035] In one embodiment, the obtaining the relative dielectric constants of the surface layer, the base layer, and the subgrade material of the target road respectively includes:

[0036] Using the surface layer material to prepare a plurality of first-type specimens, calculating the average value of the relative dielectric constants of the plurality of first-type specimens, and obtaining the relative dielectric constant of the surface layer material;

[0037] Using the base layer material to prepare a plurality of second-type specimens, calculating the average value of the relative dielectric constants of the plurality of second-type specimens, and obtaining the relative dielectric constant of the base layer material;

[0038] Using the subgrade material to prepare a plurality of third-type specimens, calculating the average value of the relative dielectric constants of the plurality of third-type specimens, and obtaining the relative dielectric constant of the subgrade material.

[0039] In a second aspect, an embodiment of the present application provides a device for detecting the size of road diseases based on ground penetrating radar. The device for detecting the size of road diseases based on ground penetrating radar includes:

[0040] An acquisition module, which is used to respectively obtain the relative dielectric constants of the surface layer, the base layer, and the subgrade material of the target road;

[0041] A first calculation module, which is used to calculate the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and the structural parameters of the ground penetrating radar;

[0042] A second calculation module, which is used to calculate the first critical dimension and the second critical dimension of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar;

[0043] A determination module, which is configured to determine the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the variation relationship between the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave and the disease horizontal size.

[0044] Combined with the second aspect, in an implementation manner, the operating parameters of the ground penetrating radar include the center frequency of the ground penetrating radar electromagnetic wave, the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar, and the first calculation module is further configured to:

[0045] If the disease is in the surface layer, calculate the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0046]

[0047] Wherein, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

[0048] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include:

[0049] By respectively obtaining the relative dielectric constants of the surface layer, base layer and subgrade materials of the target road; calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar; calculating the first critical size and the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar; and determining the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the variation relationship between the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave and the disease horizontal size. It realizes the inversion of the road disease size based on the electric field intensity of the reflected wave of the ground penetrating radar electromagnetic wave, provides data support for formulating reasonable and effective road maintenance and repair plans, thereby improving the repair efficiency of road diseases and ensuring the safety and smoothness of road traffic. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic flowchart of an embodiment of the method for detecting the size of road diseases based on a ground penetrating radar in the present application;

[0051] Figure 2 is a top view of the internal diseases of the subgrade and pavement in the present application;

[0052] Figure 3 This is a schematic diagram of the functional modules of an embodiment of the device for detecting the size of road diseases based on ground penetrating radar in this application. Specific implementation manners

[0053] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0054] To make the purpose, technical solution and advantages of this application clearer, the embodiments of this application will be further described in detail below in conjunction with the drawings.

[0055] In a first aspect, the embodiments of this application provide a method for detecting the size of road diseases based on ground penetrating radar.

[0056] In one embodiment, refer to Figure 1 , Figure 1 This is a schematic flowchart of the first embodiment of the method for detecting the size of road diseases based on ground penetrating radar in this application. As Figure 1 shown, the method for detecting the size of road diseases based on ground penetrating radar includes:

[0057] Step S101: Obtain the relative dielectric constants of the surface layer, base layer, and subgrade material of the target road respectively.

[0058] Specifically, use the surface layer material to prepare multiple first-type specimens, calculate the average value of the relative dielectric constants of the multiple first-type specimens to obtain the relative dielectric constant of the surface layer material; use the base layer material to prepare multiple second-type specimens, calculate the average value of the relative dielectric constants of the multiple second-type specimens to obtain the relative dielectric constant of the base layer material; use the subgrade material to prepare multiple third-type specimens, calculate the average value of the relative dielectric constants of the multiple third-type specimens to obtain the relative dielectric constant of the subgrade material.

[0059] Exemplarily, use the asphalt mixture used in the surface layer to prepare multiple first-type specimens, use the cement stabilized macadam material used in the base layer to prepare multiple second-type specimens, and use the subgrade filler to prepare multiple third-type specimens. The number of the first-type specimens, the second-type specimens, and the third-type specimens is not less than 15. Then use a network analyzer to test the relative dielectric constants of each specimen, and calculate the average value of the relative dielectric constants of the specimens of the same type, so as to obtain the relative dielectric constant of the surface layer material , the relative dielectric constant of the base layer material 。

[0060] Step S102: Calculate the dielectric influence factor of the disease based on the location of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar.

[0061] It should be noted that in this embodiment, the operating parameters of the ground penetrating radar include the center frequency of the electromagnetic wave of the ground penetrating radar, and the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar. The location of the disease in the target road detected by the ground penetrating radar includes: the disease is in the surface layer of the target road, the disease is in the base layer of the target road, and the disease is in the subgrade of the disease road.

[0062] Among them, the ground penetrating radar emits electromagnetic waves to the target road through the antenna. These electromagnetic waves propagate in the road medium. When the electromagnetic waves encounter the interface of different underground media, part of the electromagnetic waves will be reflected back. The receiving antenna of the ground penetrating radar captures these reflected signals, and the received reflected signals can be processed to generate a road structure image. Through image analysis, the location of the disease in the road can be determined.

[0063] In one embodiment, if the disease is in the surface layer, calculate the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0064]

[0065] Among them, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

[0066] In one embodiment, if the disease is in the base layer, calculate the dielectric influence factor of the base layer disease according to the thickness of the surface layer, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0067]

[0068] Among them, is the dielectric influence factor of the base layer disease, is the thickness of the surface layer, is the relative permittivity of the base material.

[0069] In one embodiment, if the disease is in the roadbed, according to the thickness of the base course, the thickness of the surface course, the relative permittivity of the roadbed material, the relative permittivity of the base course material, the relative permittivity of the surface course material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface course, and the speed of light in vacuum, calculate the dielectric influence factor of the roadbed disease:

[0070]

[0071] where, is the dielectric influence factor of the roadbed disease, is the thickness of the base course, is the relative permittivity of the roadbed material.

[0072] Step S103: Calculate the first critical dimension and the second critical dimension of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar.

[0073] In one embodiment, calculate the first critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0074]

[0075] where, is the first critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface course. That is, when calculating the first critical dimension of the disease in the surface course, is , when calculating the first critical dimension of the disease in the base course, is , when calculating the first critical dimension of the disease in the roadbed, is .

[0076] In one embodiment, calculate the second critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0077]

[0078] where, is the second critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface layer. That is, when calculating the first critical dimension of the disease in the surface layer, it is , when calculating the first critical dimension of the disease in the base course, it is , when calculating the first critical dimension of the disease in the subgrade, it is .

[0079] Step S104: Determine the size relationship between the horizontal dimension of the disease, the first critical dimension, and the second critical dimension according to the change relationship between the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave and the horizontal dimension of the disease.

[0080] Specifically, if the horizontal dimension of the disease increases synchronously with the reflected wave electric field intensity, it is determined that the horizontal dimension of the disease is less than the first critical dimension; if the reflected wave electric field intensity decreases synchronously as the horizontal dimension of the disease increases, it is determined that the horizontal dimension of the disease is greater than or equal to the first critical dimension and less than or equal to the second critical dimension; if the reflected wave electric field intensity remains unchanged as the horizontal dimension of the disease increases, it is determined that the horizontal dimension of the disease is greater than the second critical dimension.

[0081] Explanatorily, as Figure 2 shown, when the ground penetrating radar advances along the forward direction line, if there is a disease in the road, the horizontal dimension of the disease scanned will increase as the radar advances, and at the same time, the receiving antenna of the ground penetrating radar can obtain the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave. When the horizontal dimension of the disease is less than the first critical dimension, the disease is within the range where the electromagnetic wave can be effectively reflected. Within this range, as the horizontal dimension of the disease scanned increases, it will directly lead to an increase in the reflection area of the disease, thereby enhancing the electric field intensity of the reflected wave. When the horizontal dimension of the disease increases to the range between the first critical dimension and the second critical dimension, the increase in the disease size may cause an interference effect of the reflected wave, and part of the reflected waves cancel each other out, thereby weakening the electric field intensity of the total reflected wave, resulting in a synchronous decrease in the reflected wave electric field intensity as the horizontal dimension of the disease increases. When the horizontal dimension of the disease increases to be greater than the second critical dimension, the disease can form a stable reflection waveform, so the further increase in the disease size has a very weak impact on the reflected wave electric field intensity, and there will be a situation where the reflected wave electric field intensity remains unchanged as the horizontal dimension of the disease increases.

[0082] Therefore, based on the following principle, when the horizontal dimension of the internal disease in the surface layer, base course, or subgrade along the forward direction of the ground penetrating radar satisfies , as With the increase of when increases, the electric field strength of the reflected wave at the top of the disease increases; when is satisfied, as increases, the electric field strength of the reflected wave at the top of the disease decreases; when

[0083] is satisfied, as increases, the electric field strength of the reflected wave at the top of the disease remains unchanged. According to the relationship between the electric field strength of the reflected wave of the ground penetrating radar electromagnetic wave and the horizontal size of the disease, the size relationship between the horizontal size of the disease and the first critical size and the second critical size can be determined, so as to determine the size range of the horizontal size of the disease. In a specific embodiment 1, for a certain asphalt pavement structure, the surface layer is 18 cm thick, and the average dielectric constant , the base layer is 40 cm thick, and the average dielectric constant , the subgrade dielectric constant is 7.00 cm, and the second critical size is 20.01 cm. Therefore, when the horizontal size of the disease inside this surface layer along the advancing direction of the ground penetrating radar is less than 7.00 cm, as increases, the electric field strength of the reflected wave at the top of the disease increases; when is between 7.00 cm and 20.01 cm, as increases, the electric field strength of the reflected wave at the top of the disease decreases; when is greater than 20.01 cm, as increases, the electric field strength of the reflected wave at the top of the disease remains unchanged.

[0084] In a specific embodiment 2, for a certain asphalt pavement structure, the surface layer is 18 cm thick, and the average dielectric constant , the base layer is 40 cm thick, and the average dielectric constant , the subgrade dielectric constant , the depth of a certain disease in the surface layer is 7 cm, the distance between the transmitting and receiving antennas of the ground penetrating radar is 5 cm, and the frequency of the electromagnetic wave emitted by the ground penetrating radar is 500 MHz. Through the above method, it is calculated that the dielectric influence factor of the surface layer disease has no solution (the value inside the square root is negative), and the second critical size is 8.15 cm. Therefore, when the horizontal size of the disease inside this surface layer along the advancing direction of the ground penetrating radar is less than 8.15 cm, as increases, as As it increases, the electric field strength of the reflected wave at the top of the disease decreases; when is greater than 8.15 cm, as increases, the electric field strength of the reflected wave at the top of the disease remains unchanged.

[0085] In a specific Embodiment 3, for a certain asphalt pavement structure, the surface layer is 18 cm thick, and the average dielectric constant , the base layer is 40 cm thick, and the average dielectric constant , the subgrade dielectric constant , the buried depth of a certain disease in the base layer is 25 cm, the distance between the transmitting and receiving antennas of the ground penetrating radar is 5 cm, and the frequency of the electromagnetic wave emitted by the ground penetrating radar is 200 MHz. Through the above method, it is calculated that the dielectric influence factor of the base layer disease , the first critical dimension 3.88 cm, the second critical dimension 12.82 cm. Therefore, when the horizontal dimension of the disease inside this surface layer along the advancing direction of the ground penetrating radar is less than 3.88 cm, as increases, the electric field strength of the reflected wave at the top of the disease increases accordingly; when is between 3.88 cm and 12.82 cm, as increases, the electric field strength of the reflected wave at the top of the disease decreases accordingly; when is greater than 12.82 cm, as increases, the electric field strength of the reflected wave at the top of the disease remains unchanged.

[0086] In a specific Embodiment 4, for a certain asphalt pavement structure, the surface layer is 18 cm thick, and the average dielectric constant , the base layer is 40 cm thick, and the average dielectric constant , the subgrade dielectric constant , the buried depth of a certain disease in the subgrade is 7 cm, the distance between the transmitting and receiving antennas of the ground penetrating radar is 5 cm, and the frequency of the electromagnetic wave emitted by the ground penetrating radar is 100 MHz. Through the above method, it is calculated that the dielectric influence factor of the subgrade disease , the first critical dimension has no solution (negative value inside the square root), the second critical dimension 13.98 cm. Therefore, when the horizontal dimension of the disease inside this surface layer along the advancing direction of the ground penetrating radar is less than 13.98 cm, as increases, the electric field strength of the reflected wave at the top of the disease decreases accordingly; when is greater than 13.98 cm, as increases, the electric field strength of the reflected wave at the top of the disease remains unchanged.

[0087] The method for detecting the size of road diseases based on ground penetrating radar provided by the present invention calculates the first critical size and the second critical size of internal diseases in the road surface layer, base layer, and subgrade, and accordingly gives the relationship between the electric field strength of the electromagnetic reflection wave at the top of the internal disease in the subgrade and road surface and the horizontal size of the disease along the advancing direction of the ground penetrating radar. This can provide a reference for inverting the size of diseases in the subgrade and road surface based on the electric field strength of the reflection wave of the ground penetrating radar, thereby realizing providing data support for formulating reasonable and effective road maintenance and repair plans, improving the repair efficiency of road diseases, and ensuring the safety and smoothness of road traffic.

[0088] In a second aspect, an embodiment of the present application further provides a device for detecting the size of road diseases based on ground penetrating radar.

[0089] In one embodiment, referring to Figure 3 , Figure 3 is a schematic diagram of the functional modules of an embodiment of the device for detecting the size of road diseases based on ground penetrating radar in the present application. As shown in Figure 3 , the device for detecting the size of road diseases based on ground penetrating radar includes:

[0090] An acquisition module, which is used to respectively acquire the relative dielectric constants of the surface layer, base layer, and subgrade materials of the target road;

[0091] A first calculation module, which is used to calculate the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar;

[0092] A second calculation module, which is used to calculate the first critical size and the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar;

[0093] A determination module, which is used to determine the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the change relationship between the electric field strength of the reflected wave of the ground penetrating radar electromagnetic wave and the horizontal size of the disease.

[0094] Further, in one embodiment, the operating parameters of the ground penetrating radar include the center frequency of the electromagnetic wave of the ground penetrating radar, the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar, and the first calculation module is further used for:

[0095] If the disease is in the surface layer, calculate the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum:

[0096]

[0097] Among them, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

[0098] Furthermore, in one embodiment, the first calculation module is further configured to:

[0099] If the disease is in the base layer, then according to the thickness of the surface layer, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum, calculate the dielectric influence factor of the base layer disease:

[0100]

[0101] Among them, is the dielectric influence factor of the base layer disease, is the thickness of the surface layer, is the relative dielectric constant of the base layer material.

[0102] Furthermore, in one embodiment, the first calculation module is further configured to:

[0103] If the disease is in the subgrade, then according to the thickness of the base layer, the thickness of the surface layer, the relative dielectric constant of the subgrade material, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum, calculate the dielectric influence factor of the subgrade disease:

[0104]

[0105] Among them, is the dielectric influence factor of the subgrade disease, is the thickness of the base layer, is the relative dielectric constant of the subgrade material.

[0106] Furthermore, in one embodiment, the second calculation module is further configured to:

[0107] Calculate the first critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0108]

[0109] Among them, is the first critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface layer.

[0110] Further, in one embodiment, the second calculation module is further configured to:

[0111] Calculate the second critical dimension according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar:

[0112]

[0113] Wherein, is the second critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface layer.

[0114] Further, in one embodiment, the determination module is further configured to:

[0115] Determine the size relationship between the horizontal size of the disease and the first critical dimension and the second critical dimension according to the variation relationship between the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave and the horizontal size of the disease, including:

[0116] If the horizontal size of the disease increases synchronously with the reflected wave electric field intensity, it is determined that the horizontal size of the disease is less than the first critical dimension;

[0117] If the reflected wave electric field intensity decreases synchronously as the horizontal size of the disease increases, it is determined that the horizontal size of the disease is greater than or equal to the first critical dimension and less than or equal to the second critical dimension;

[0118] If the reflected wave electric field intensity remains unchanged as the horizontal size of the disease increases, it is determined that the horizontal size of the disease is greater than the second critical dimension.

[0119] Further, in one embodiment, the acquisition module is further configured to:

[0120] Prepare a plurality of first-type specimens using the surface layer material, calculate the average relative dielectric constant of the plurality of first-type specimens, and obtain the relative dielectric constant of the surface layer material;

[0121] Prepare a plurality of second-type specimens using the base material, calculate the average relative dielectric constant of the plurality of second-type specimens, and obtain the relative dielectric constant of the base material;

[0122] Prepare multiple third - type specimens using subgrade materials, calculate the average relative dielectric constant of the multiple third - type specimens, and obtain the relative dielectric constant of the subgrade materials.

[0123] Among them, the functional implementation of each module in the device for detecting the size of road diseases based on ground - penetrating radar corresponds to each step in the method embodiment for detecting the size of road diseases based on ground - penetrating radar. Their functions and implementation processes will not be elaborated here one by one.

[0124] It should be noted that the serial numbers of the embodiments of the present application are only for description and do not represent the superiority or inferiority of the embodiments.

[0125] The terms "including" and "having" and any variations thereof in the specification, claims and drawings of the present application are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices. The descriptions of terms such as "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit that "first", "second" and "third" are different types.

[0126] In the description of the embodiments of the present application, words such as "exemplary", "for example" or "for instance" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary", "for example" or "for instance" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary", "for example" or "for instance" is intended to present related concepts in a specific manner.

[0127] In the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B; "and / or" in the text is only a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0128] In some of the processes described in the embodiments of the present application, there are multiple operations or steps that appear in a specific order. However, it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or may be executed in parallel. The serial numbers of the operations are only used to distinguish different operations, and the serial numbers themselves do not represent any order of execution. Additionally, these processes may include more or fewer operations, and these operations or steps may be executed in order or in parallel, and these operations or steps may be combined.

[0129] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal device to execute the methods described in the various embodiments of the present application.

[0130] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A method for detecting the size of road diseases based on ground penetrating radar, characterized in that, The method for detecting the size of road diseases based on ground penetrating radar includes: Obtaining the relative dielectric constants of the surface layer, base layer, and subgrade material of the target road respectively; Calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar; Calculating the first critical size and the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar; Determining the magnitude relationship between the horizontal size of the disease and the first critical size and the second critical size according to the variation relationship of the reflected wave electric field intensity of the ground penetrating radar electromagnetic wave with the horizontal size of the disease.

2. The method for detecting the size of road diseases based on ground penetrating radar according to claim 1, wherein, The operating parameters of the ground penetrating radar include the center frequency of the electromagnetic wave of the ground penetrating radar, and the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar. Calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar includes: If the disease is in the surface layer, calculating the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum: Among them, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

3. The method for detecting the size of road diseases based on ground penetrating radar according to claim 2, wherein Calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar further includes: If the disease is in the base layer, calculating the dielectric influence factor of the base layer disease according to the thickness of the surface layer, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum: wherein, is the dielectric influence factor of the base course disease, is the thickness of the surface course, is the relative dielectric constant of the base course material.

4. The method for detecting the size of road diseases based on ground penetrating radar according to claim 3, wherein, Calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar further includes: If the disease is in the subgrade, calculating the dielectric influence factor of the subgrade disease according to the thickness of the base layer, the thickness of the surface layer, the relative dielectric constant of the subgrade material, the relative dielectric constant of the base layer material, the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum: wherein, is the dielectric influence factor of the subgrade disease, is the thickness of the base course, is the relative dielectric constant of the subgrade material.

5. The method for detecting the size of road diseases based on ground penetrating radar according to any one of claims 4, wherein Calculating the first critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar includes: Calculating the first critical size according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar; Among them, is the first critical dimension, is the dielectric influence factor of the disease, where ∈ , is the distance from the top of the disease to the upper surface of the surface layer.

6. The method for detecting the size of road diseases based on ground penetrating radar according to any one of claims 4, characterized in that Calculating the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar includes: Calculating the second critical size according to the dielectric influence factor of the disease and the antenna distance of the ground penetrating radar: Among them, is the second critical dimension, is the dielectric influence factor of the said disease, where ∈ , is the distance from the top of the said disease to the upper surface of the surface layer.

7. The method for detecting the size of road diseases based on ground penetrating radar according to claim 1, wherein Determine the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the variation relationship between the electric field strength of the reflected wave of the ground penetrating radar electromagnetic wave and the horizontal size of the disease, including: If the horizontal size of the disease increases synchronously with the electric field strength of the reflected wave, it is determined that the horizontal size of the disease is smaller than the first critical size; If the electric field strength of the reflected wave decreases synchronously as the horizontal size of the disease increases, it is determined that the horizontal size of the disease is greater than or equal to the first critical size and less than or equal to the second critical size; If the electric field strength of the reflected wave remains unchanged as the horizontal size of the disease increases, it is determined that the horizontal size of the disease is greater than the second critical size.

8. The method for detecting the size of road diseases based on ground penetrating radar according to claim 1, wherein, The steps of respectively obtaining the relative dielectric constants of the surface layer, base layer and subgrade materials of the target road include: Prepare multiple first-class specimens using the surface layer material, calculate the average value of the relative dielectric constants of the multiple first-class specimens, and obtain the relative dielectric constant of the surface layer material; Prepare multiple second-class specimens using the base layer material, calculate the average value of the relative dielectric constants of the multiple second-class specimens, and obtain the relative dielectric constant of the base layer material; Prepare multiple third-class specimens using the subgrade material, calculate the average value of the relative dielectric constants of the multiple third-class specimens, and obtain the relative dielectric constant of the subgrade material.

9. A device for detecting the size of road diseases based on ground penetrating radar, characterized in that, The device for detecting the size of road diseases based on ground penetrating radar includes: An acquisition module for respectively obtaining the relative dielectric constants of the surface layer, base layer and subgrade materials of the target road; A first calculation module for calculating the dielectric influence factor of the disease based on the position of the disease in the target road detected by the ground penetrating radar, the relative dielectric constant, the operating parameters and structural parameters of the ground penetrating radar; A second calculation module for calculating the first critical size and the second critical size of the disease according to the dielectric influence factor of the disease and the structural parameters of the ground penetrating radar; A determination module for determining the size relationship between the horizontal size of the disease and the first critical size and the second critical size according to the variation relationship between the electric field strength of the reflected wave of the ground penetrating radar electromagnetic wave and the horizontal size of the disease.

10. The method for detecting the size of road diseases based on ground penetrating radar according to claim 9, characterized in that The operating parameters of the ground penetrating radar include the center frequency of the ground penetrating radar electromagnetic wave, and the structural parameters of the ground penetrating radar include the antenna distance between the transmitting antenna and the receiving antenna of the ground penetrating radar. The first calculation module is further used for: If the disease is in the surface layer, calculate the dielectric influence factor of the surface layer disease according to the relative dielectric constant of the surface layer material, the center frequency, the antenna distance, the distance from the top of the disease to the upper surface of the surface layer, and the speed of light in vacuum: wherein, is the dielectric influence factor of the surface layer disease, is the relative dielectric constant of the surface layer material, is the center frequency, d is the antenna distance, is the distance from the top of the disease to the upper surface of the surface layer, is the speed of light in vacuum.

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