Quantification method and device for degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection

Abstract

The present invention discloses a quantization method and device for the degree of heterogeneous interference of an asphalt pavement in ground penetrating radar detection. By respectively obtaining the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement; respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factors of the asphalt surface layer; respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the water stable base layer according to the heterogeneous interference waves of the water stable base layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the water stable base layer according to the heterogeneous interference factors of the water stable base layer, the degree of interference of the material heterogeneous characteristics of the asphalt surface layer and the water stable base layer on the detection result in ground penetrating radar detection is quantified.

Description

Technical Field

[0001] This application relates to the technical field of road detection and processing, and specifically relates to a method and device for quantifying the degree of heterogeneous interference in asphalt pavements during ground penetrating radar detection. Background Art

[0002] Asphalt pavements are an important part of modern road traffic networks, and their structures usually consist of two key structural layers: the upper asphalt surface layer and the lower cement stabilized base layer. Asphalt mixtures and cement stabilized macadam, as the main materials for these two layers, are both composed of a variety of components such as aggregates, voids, and asphalt mortar (or cement mortar). This complex composition structure makes both layers of materials heterogeneous materials that are non-uniform.

[0003] When using ground penetrating radar to detect asphalt pavements, electromagnetic waves will reflect at the interfaces between different components in heterogeneous materials to form interference waves. These interference waves are superimposed on the reflection waves from potential diseases inside the pavement (such as cracks, cavities, etc.) or at the interfaces between structural layers, thus interfering with the reflection wave detection signals. This may lead to a decrease in the evaluation accuracy when assessing the pavement condition based on the detection signals. During the actual detection process, the frequency range of the electromagnetic waves emitted by the ground penetrating radar antenna is usually between 400 MHz and 2000 MHz. This frequency band selection aims to balance the requirements of detection depth and resolution. However, in related technologies, there is still a lack of a unified and effective measurement index for the propagation characteristics and interference degree of electromagnetic waves in heterogeneous materials at different frequencies, which in turn affects the accuracy and reliability of the detection results of ground penetrating radar for asphalt pavements.

[0004] Therefore, how to measure the degree of heterogeneous interference in pavement structural layers while paying attention to multiple ground penetrating radar electromagnetic wave frequencies is a technical problem to be solved. Summary of the Invention

[0005] This application provides a method and device for quantifying the degree of heterogeneous interference in asphalt pavements during ground penetrating radar detection, which can solve the technical problem in the prior art that the interference degree of electromagnetic waves in heterogeneous materials cannot be quantified, affecting the accuracy and reliability of the detection results of ground penetrating radar for asphalt pavements.

[0006] In a first aspect, an embodiment of this application provides a method for quantifying the degree of heterogeneous interference in an asphalt pavement during ground penetrating radar detection. The method for quantifying the degree of heterogeneous interference in an asphalt pavement during ground penetrating radar detection includes:

[0007] Obtain the reflection waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the cement stabilized base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement respectively;

[0008] According to the heterogeneous interference waves of the asphalt surface layer in the reflected waves of each frequency respectively, determine the heterogeneous interference factors of the reflected waves of each frequency in the asphalt surface layer, and calculate the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factors of the asphalt surface layer;

[0009] According to the heterogeneous interference waves of the cement stabilized base course in the reflected waves of each frequency respectively, determine the heterogeneous interference factors of the reflected waves of each frequency in the cement stabilized base course, and calculate the broadband heterogeneous interference coefficient of the cement stabilized base course according to the heterogeneous interference factors of the cement stabilized base course.

[0010] Combined with the first aspect, in one embodiment, when respectively obtaining the reflected waves of corresponding frequencies between the top of the asphalt surface layer and the bottom of the cement stabilized base course of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement, it includes:

[0011] Respectively obtain the reflected waves of corresponding frequencies between the top of the asphalt surface layer and the bottom of the cement stabilized base course when the ground penetrating radar sends electromagnetic waves of frequencies 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz to the target asphalt pavement;

[0012] Respectively use the electric field strength of the reflected waves of each frequency as the ordinate and the travel time as the abscissa to generate the electric field strength - travel time curves of the reflected waves of each frequency.

[0013] In one embodiment, after generating the electric field strength - travel time curves of the reflected waves of each frequency, and before respectively determining the heterogeneous interference factors of the reflected waves of each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves of each frequency, it further includes:

[0014] According to the electric field strength - travel time curves of the reflected waves of each frequency, determine the sub - waves at the top of the asphalt surface layer, the sub - waves at the interface between the asphalt surface layer and the cement stabilized base course, and the sub - waves at the bottom of the cement stabilized base course in the reflected waves of each frequency;

[0015] Determine the reflected wave between the sub - wave at the top of the asphalt surface layer and the sub - wave at the interface between the asphalt surface layer and the cement stabilized base course as the heterogeneous interference wave of the asphalt surface layer;

[0016] Determine the reflected wave between the sub - wave at the interface between the asphalt surface layer and the cement stabilized base course and the sub - wave at the bottom of the cement stabilized base course as the heterogeneous interference wave of the cement stabilized base course.

[0017] In one embodiment, the step of respectively determining the heterogeneous interference factors of the reflected waves of each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves of each frequency includes:

[0018] Calculate the heterogeneous interference factor of the reflected wave at each frequency in the asphalt surface layer according to the peak time and wavelength of the sub-wave at the top of the asphalt surface layer, and the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stabilized base layer:

[0019]

[0020] where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at MHz, is the peak time of the sub-wave at the top of the asphalt surface layer, is the peak time of the sub-wave at the interface between the asphalt surface layer and the water-stabilized base layer, is the wavelength of the sub-wave at the top of the asphalt surface layer, is the wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stabilized base layer, is the sub-wave at the interface between the asphalt surface layer and the water-stabilized base layer, is the heterogeneous interference wave of the asphalt surface layer.

[0021] In one embodiment, calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factor of the asphalt surface layer includes:

[0022] Establish a broadband heterogeneous interference continuous function of the asphalt surface layer respectively according to the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer:

[0023]

[0024] where, is the broadband heterogeneous interference continuous function of the asphalt surface layer, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at MHz, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at MHz, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at MHz, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at MHz;

[0025] Calculate the broadband heterogeneous interference coefficient of the asphalt surface layer according to the broadband heterogeneous interference continuous function of the asphalt surface layer:

[0026]

[0027] where SC is the broadband heterogeneous interference coefficient of the asphalt surface layer.

[0028] In one embodiment, determining the heterogeneous interference factor of the reflected waves at each frequency in the water-stable base layer according to the heterogeneous interference waves of the water-stable base layer in the reflected waves at each frequency includes

[0029] Calculating the heterogeneous interference factor of the reflected waves at each frequency in the water-stable base layer according to the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer and the peak time and wavelength of the sub-wave at the bottom of the water-stable base layer in the reflected waves at each frequency:

[0030]

[0031] where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the peak time of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the peak time of the sub-wave at the bottom of the water-stable base layer, is the wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the wavelength of the sub-wave at the bottom of the water-stable base layer, is the sub-wave at the bottom of the water-stable base layer, is the heterogeneous interference wave of the water-stable base layer.

[0032] In one embodiment, calculating the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factor of the water-stable base layer includes:

[0033] Establishing a broadband heterogeneous interference continuous function of the water-stable base layer respectively according to the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer:

[0034]

[0035] where, is the broadband heterogeneous interference continuous function of the water-stable base layer, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz;

[0036] Calculate the broadband heterogeneous interference coefficient of the water-stabilized base course according to the broadband heterogeneous interference continuous function of the water-stabilized base course:

[0037]

[0038] Wherein, is the broadband heterogeneous interference coefficient of the water-stabilized base course.

[0039] In one embodiment, the method further includes:

[0040] If the broadband heterogeneous interference coefficient of the asphalt surface course is larger, it is determined that the heterogeneous characteristics of the asphalt surface course interfere more with the reflected wave in the ground penetrating radar detection;

[0041] If the broadband heterogeneous interference coefficient of the water-stabilized base course is larger, it is determined that the heterogeneous characteristics of the water-stabilized base course interfere more with the reflected wave in the ground penetrating radar detection.

[0042] In a second aspect, an embodiment of the present application provides a quantization device for the heterogeneous interference degree of an asphalt pavement in ground penetrating radar detection. The quantization device for the heterogeneous interference degree of the asphalt pavement in ground penetrating radar detection includes:

[0043] An acquisition module, which is used to respectively acquire the reflected waves corresponding to different frequencies between the top of the asphalt surface course and the bottom of the water-stabilized base course of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves with different frequencies to the target asphalt pavement;

[0044] A first calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface course according to the heterogeneous interference waves of the asphalt surface course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the asphalt surface course according to the heterogeneous interference factors of the asphalt surface course;

[0045] A second calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the water-stabilized base course according to the heterogeneous interference waves of the water-stabilized base course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the water-stabilized base course according to the heterogeneous interference factors of the water-stabilized base course.

[0046] Combined with the second aspect, in one embodiment, the acquisition module is further used for:

[0047] Respectively acquire the reflected waves corresponding to different frequencies between the top of the asphalt surface course and the bottom of the water-stabilized base course of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves with frequencies of 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz to the target asphalt pavement;

[0048] Respectively generate the electric field strength-travel time curves of the reflected waves at each frequency with the electric field strength of the reflected waves at each frequency as the ordinate and the travel time as the abscissa.

[0049] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include:

[0050] By respectively obtaining the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water-stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement; respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factors of the asphalt surface layer; respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer according to the heterogeneous interference waves of the water-stable base layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factors of the water-stable base layer, the interference degree of the material heterogeneous characteristics of the asphalt surface layer and the water-stable base layer on the detection result in the ground penetrating radar detection is quantified, filling the gap in the method for measuring the heterogeneous interference degree of the asphalt pavement structure layer when simultaneously paying attention to multiple ground penetrating radar electromagnetic wave frequencies, and the broadband heterogeneous interference coefficient can also be used to compare the effectiveness of various heterogeneous interference wave filtering algorithms. The smaller the value of the broadband heterogeneous interference coefficient of the filtered signal, the better the filtering algorithm effect. Description of the Drawings

[0051] Figure 1 It is a schematic flowchart of an embodiment of the method for quantifying the heterogeneous interference degree of an asphalt pavement in the ground penetrating radar detection of the present application;

[0052] Figure 2 It is a schematic diagram of each waveform segment and the corresponding moment in the ground penetrating radar reflected wave signal;

[0053] Figure 3 It is a schematic diagram of the functional modules of an embodiment of the device for quantifying the heterogeneous interference degree of an asphalt pavement in the ground penetrating radar detection. Detailed Embodiments

[0054] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0055] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0056] In a first aspect, the embodiments of the present application provide a method for quantifying the heterogeneous interference degree of an asphalt pavement in the ground penetrating radar detection.

[0057] In one embodiment, referring to Figure 1 , Figure 1 is a schematic flowchart of the first embodiment of the quantization method for the degree of heterogeneous interference of asphalt pavement in the ground penetrating radar detection of this application. As Figure 1 shown, the quantization method for the degree of heterogeneous interference of asphalt pavement in the ground penetrating radar detection includes:

[0058] Step S101: Respectively obtain the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water-stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement.

[0059] Specifically, successively select ground penetrating radar antennas with four frequencies of 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz for testing respectively, and respectively obtain the reflected waves corresponding to the frequencies of 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz of the electromagnetic waves emitted when the ground penetrating radar sends electromagnetic waves to the target asphalt pavement. The reflected wave frequency of the electromagnetic wave corresponds to the electromagnetic wave frequency, so reflected waves of 4 frequencies can be obtained.

[0060] Then, taking the electric field intensity of the reflected waves of each frequency as the ordinate and the travel time of the reflected waves as the abscissa, generate the electric field intensity - travel time curves of the reflected waves of each frequency. The electric field intensity - travel time curves of the reflected waves are as Figure 2 shown. A electric field intensity - travel time curve is generated for the reflected wave of each frequency. In this embodiment, a total of 4 electric field intensity - travel time curves are generated for the reflected waves of 4 frequencies.

[0061] Furthermore, after generating the electric field intensity - travel time curves of the reflected waves of each frequency, it further includes: determining the sub - wave at the top of the asphalt surface layer, the sub - wave at the interface between the asphalt surface layer and the water - stable base layer, and the sub - wave at the bottom of the water - stable base layer in the reflected waves of each frequency; determining the reflected wave between the sub - wave at the top of the asphalt surface layer and the sub - wave at the interface between the asphalt surface layer and the water - stable base layer as the heterogeneous interference wave of the asphalt surface layer; determining the reflected wave between the sub - wave at the interface between the asphalt surface layer and the water - stable base layer and the sub - wave at the bottom of the water - stable base layer as the heterogeneous interference wave of the water - stable base layer.

[0062] Exemplarily, as Figure 2 shown, in the electric field intensity - travel time curve of the reflected wave with a frequency of [[ID=3i]]MHz, the sub - wave corresponding to the reflected wave at the top of the asphalt surface layer is denoted as , and the peak time of the sub - wave is , and the wavelength is ; The wavelet at the interface between the bituminous surface course and the cement stabilized base course is denoted as , the wavelet has a peak time of , and a wavelength of ; The wavelet at the bottom of the cement stabilized base course is denoted as , the wavelet has a peak time of , and a wavelength of .

[0063] In the electric field strength - travel time curve of the reflected wave, the reflected wave between the wavelet at the top of the bituminous surface course and the wavelet at the interface between the bituminous surface course and the cement stabilized base course is the heterogeneous interference wave in the bituminous surface course, which is uniformly denoted as ; The reflected wave between the wavelet at the interface between the bituminous surface course and the cement stabilized base course and the wavelet at the bottom of the cement stabilized base course is the heterogeneous interference wave of the said cement stabilized base course, which is uniformly denoted as .

[0064] Step S102: Respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the bituminous surface course according to the heterogeneous interference waves of the bituminous surface course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the bituminous surface course according to the heterogeneous interference factors of the bituminous surface course.

[0065] Specifically, the step of respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the bituminous surface course according to the heterogeneous interference waves of the bituminous surface course in the reflected waves at each frequency includes:

[0066] Calculate the heterogeneous interference factors of the reflected waves at each frequency in the bituminous surface course according to the peak time and wavelength of the wavelet at the top of the bituminous surface course and the peak time and wavelength of the wavelet at the interface between the bituminous surface course and the cement stabilized base course in the reflected waves at each frequency:

[0067]

[0068] where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the bituminous surface course at a frequency of MHz, is the peak time of the wavelet at the top of the bituminous surface course, is the peak time of the wavelet at the interface between the bituminous surface course and the cement stabilized base course, is the wavelength of the wavelet at the top of the bituminous surface course, is the wavelength of the wavelet at the interface between the bituminous surface course and the cement stabilized base course, is the wavelet at the interface between the bituminous surface course and the cement stabilized base course, is the heterogeneous interference wave of the asphalt surface layer.

[0069] Further, calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factor of the asphalt surface layer includes:

[0070] Establishing a broadband heterogeneous interference continuous function of the asphalt surface layer respectively according to the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer:

[0071]

[0072] Wherein, is the broadband heterogeneous interference continuous function of the asphalt surface layer, is the heterogeneous interference factor of the reflected wave at frequency in the asphalt surface layer, is the heterogeneous interference factor of the reflected wave at frequency in the asphalt surface layer, is the heterogeneous interference factor of the reflected wave at frequency in the asphalt surface layer, is the heterogeneous interference factor of the reflected wave at frequency in the asphalt surface layer.

[0073] Calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the broadband heterogeneous interference continuous function of the asphalt surface layer:

[0074]

[0075] Wherein, SC is the broadband heterogeneous interference coefficient of the asphalt surface layer.

[0076] It should be noted that if the broadband heterogeneous interference coefficient SC of the asphalt surface layer is larger, it is determined that the heterogeneous characteristics of the asphalt surface layer have a greater and more significant interference on the reflected wave in the ground penetrating radar detection.

[0077] Step S103: Respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the cement stabilized base according to the heterogeneous interference waves of the cement stabilized base in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the cement stabilized base according to the heterogeneous interference factors of the cement stabilized base.

[0078] Specifically, the step of respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the cement stabilized base according to the heterogeneous interference waves of the cement stabilized base in the reflected waves at each frequency includes

[0079] Calculate the heterogeneous interference factor of the reflected wave at each frequency in the water-stable base layer according to the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, and the peak time and wavelength of the sub-wave at the bottom of the water-stable base layer:

[0080]

[0081] Among them, k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the peak time of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the peak time of the sub-wave at the bottom of the water-stable base layer, is the wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the wavelength of the sub-wave at the bottom of the water-stable base layer, is the sub-wave at the bottom of the water-stable base layer, is the heterogeneous interference wave of the water-stable base layer.

[0082] Furthermore, calculate the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factor of the water-stable base layer, including:

[0083] Establish a broadband heterogeneous interference continuous function of the water-stable base layer respectively according to the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer:

[0084]

[0085] Among them, is the broadband heterogeneous interference continuous function of the water-stable base layer, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at MHz.

[0086] Calculate the broadband heterogeneous interference coefficient of the water-stable base layer according to the broadband heterogeneous interference continuous function of the water-stable base layer:

[0087]

[0088] Among them, is the broadband heterogeneous interference coefficient of the water-stable base layer.

[0089] It is worth noting that, if the broadband heterogeneous interference coefficient of the water-stable base layer is larger, it is determined that the heterogeneous characteristics of the water-stable base layer will cause greater interference to the reflected wave in the ground penetrating radar detection.

[0090] The invention provides a method for quantifying the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection, which calculates the broadband heterogeneous interference coefficient of electromagnetic wave reflection wave in asphalt pavement. , and broadband heterogeneous interference coefficient in water-stable base , quantifying the degree of interference of the material heterogeneity characteristics of the asphalt surface layer and the water-stable base layer on the detection results during ground penetrating radar detection, filling the gap in the method of measuring the degree of heterogeneous interference of the pavement structure layer when considering multiple ground penetrating radar electromagnetic wave frequencies at the same time. It can be understood that the broadband heterogeneous interference coefficient is related to the properties of the asphalt pavement, so the broadband heterogeneous interference coefficient can be used to correct the ground penetrating radar detection results of the asphalt surface layer and the water-stable base layer, thereby improving the accuracy of the detection. It can also be used to compare the effectiveness of various heterogeneous interference wave filtering algorithms, and the signal obtained after filtering is and The smaller the value, the better the algorithm effect.

[0091] In specific embodiment 1, the heterogeneous interference factors in the asphalt surface layer and the water-stable base layer of the first asphalt pavement are calculated according to the above method as shown in Table 1. According to the calculated heterogeneous interference factors, the broadband heterogeneous interference coefficient of the electromagnetic wave reflection wave in the asphalt surface layer and the water-stable base layer can be calculated. and They are 13.35 and 16.05 respectively.

[0092] Table 1 Heterogeneous interference factors in the asphalt surface layer and water-stable base layer of the first asphalt pavement

[0093]

[0094] In specific embodiment 2, the heterogeneous interference factors in the asphalt surface layer and the water-stable base layer of the second asphalt pavement are calculated according to the above method as shown in Table 2. Based on the calculated heterogeneous interference factors, the broadband heterogeneous interference coefficient of the electromagnetic wave reflection wave in the asphalt surface layer and the water-stable base layer can be calculated. and They are 16.40 and 19.65 respectively.

[0095] Table 2 Heterogeneous interference factors in the asphalt surface layer and water-stable base layer of the second asphalt pavement

[0096]

[0097] In the specific Embodiment 3, according to the above method, the heterogeneous interference factors in the asphalt surface course and the water-stable base course of the third asphalt pavement are shown in Table 3. Based on the calculated heterogeneous interference factors, the broadband heterogeneous interference coefficients of the electromagnetic wave reflected waves in the asphalt surface course and the water-stable base course can be calculated. and are 16.35 and 20.85 respectively.

[0098] Table 3 Heterogeneous interference factor table in the asphalt surface course and the water-stable base course of the third asphalt pavement

[0099]

[0100] It can be seen that among the first asphalt pavement, the second asphalt pavement and the third asphalt pavement, the asphalt surface course and the water-stable base course of the first asphalt pavement have the least interference on the ground penetrating radar electromagnetic waves, and have the best effect on the first heterogeneous interference wave filtering algorithm.

[0101] In a second aspect, the embodiments of the present application further provide a quantization device for the heterogeneous interference degree of asphalt pavements in ground penetrating radar detection.

[0102] In one embodiment, referring to Figure 3 , Figure 3 is a schematic diagram of the functional modules of an embodiment of the quantization device for the heterogeneous interference degree of asphalt pavements in ground penetrating radar detection of the present application. As Figure 3 shown, the quantization device for the heterogeneous interference degree of asphalt pavements in ground penetrating radar detection includes:

[0103] An acquisition module, which is used to respectively acquire the reflected waves corresponding to different frequencies between the top of the asphalt surface course and the bottom of the water-stable base course of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement;

[0104] A first calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface course according to the heterogeneous interference waves of the asphalt surface course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the asphalt surface course according to the heterogeneous interference factors of the asphalt surface course;

[0105] A second calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base course according to the heterogeneous interference waves of the water-stable base course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the water-stable base course according to the heterogeneous interference factors of the water-stable base course.

[0106] Furthermore, in one embodiment, the acquisition module is further used for:

[0107] Obtain the reflected waves corresponding to the frequencies of 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz respectively when the ground penetrating radar sends electromagnetic waves to the target asphalt pavement, between the top of the asphalt surface layer and the bottom of the water-stable base layer;

[0108] Generate the electric field strength - travel time curves of the reflected waves at each frequency, with the electric field strength of the reflected waves at each frequency as the ordinate and the travel time as the abscissa.

[0109] Furthermore, in an embodiment, the quantification device for the degree of heterogeneous interference in the asphalt pavement during the detection by the ground penetrating radar further includes:

[0110] A determination module, which is used to determine the sub-wave at the top of the asphalt surface layer, the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, and the sub-wave at the bottom of the water-stable base layer in the reflected waves at each frequency according to the electric field strength - travel time curves of the reflected waves at each frequency;

[0111] Determine that the reflected wave between the sub-wave at the top of the asphalt surface layer and the sub-wave at the interface between the asphalt surface layer and the water-stable base layer is the heterogeneous interference wave of the asphalt surface layer;

[0112] Determine that the reflected wave between the sub-wave at the interface between the asphalt surface layer and the water-stable base layer and the sub-wave at the bottom of the water-stable base layer is the heterogeneous interference wave of the water-stable base layer.

[0113] Furthermore, in an embodiment, the first calculation module is further used for:

[0114] Calculate the heterogeneous interference factor of the reflected waves at each frequency in the asphalt surface layer according to the peak time and wavelength of the sub-wave at the top of the asphalt surface layer in the reflected waves at each frequency, and the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer:

[0115]

[0116] where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer when the frequency is MHz, is the peak time of the sub-wave at the top of the asphalt surface layer, is the peak time of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the wavelength of the sub-wave at the top of the asphalt surface layer, is the wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the heterogeneous interference wave of the asphalt surface layer.

[0117] Furthermore, in an embodiment, the first calculation module is further used for:

[0118] Based on the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer, establish a broadband heterogeneous interference continuous function of the asphalt surface layer:

[0119]

[0120] wherein, is the broadband heterogeneous interference continuous function of the asphalt surface layer, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer when the frequency is ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer when the frequency is ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer when the frequency is ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer when the frequency is ;

[0121] Calculate the broadband heterogeneous interference coefficient of the asphalt surface layer according to the broadband heterogeneous interference continuous function of the asphalt surface layer:

[0122]

[0123] wherein, SC is the broadband heterogeneous interference coefficient of the asphalt surface layer.

[0124] Further, in one embodiment, the second calculation module is further configured to: calculate the heterogeneous interference factor of the reflected wave at each frequency in the water-stable base layer according to the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer in the reflected wave at each frequency, and the peak time and wavelength of the sub-wave at the bottom of the water-stable base layer:

[0125]

[0126] wherein, k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the water-stable base layer when the frequency is MHz, is the peak time of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the peak time of the sub-wave at the bottom of the water-stable base layer, is the wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, is the wavelength of the sub-wave at the bottom of the water-stable base layer, is the sub-wave at the bottom of the water-stable base layer, is the heterogeneous interference wave of the water-stable base layer.

[0127] Further, in one embodiment, the second calculation module is further configured to:

[0128] Establish a broadband heterogeneous interference continuous function of the water-stable base layer according to the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer:

[0129]

[0130] Wherein, is the broadband heterogeneous interference continuous function of the water-stable base layer, is the heterogeneous interference factor of the reflected wave in the water-stable base layer at frequency ; is the heterogeneous interference factor of the reflected wave in the water-stable base layer at frequency ; is the heterogeneous interference factor of the reflected wave in the water-stable base layer at frequency ; is the heterogeneous interference factor of the reflected wave in the water-stable base layer at frequency ;

[0131] Calculate the broadband heterogeneous interference coefficient of the water-stable base layer according to the broadband heterogeneous interference continuous function of the water-stable base layer:

[0132]

[0133] Wherein, is the broadband heterogeneous interference coefficient of the water-stable base layer.

[0134] Among them, the function implementation of each module in the quantification device for the heterogeneous interference degree of the asphalt pavement in the above ground-penetrating radar detection corresponds to each step in the embodiment of the method for quantifying the heterogeneous interference degree of the asphalt pavement in the above ground-penetrating radar detection, and its function and implementation process will not be elaborated here one by one.

[0135] It should be noted that the serial numbers of the above embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0136] The terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings 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 optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices. The descriptions of the terms "first", "second", and "third", etc. 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.

[0137] In the description of the embodiments of the present application, terms such as "exemplary", "for example", or "for instance" are used to denote 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 terms such as "exemplary", "for example", or "for instance" is intended to present relevant concepts in a specific manner.

[0138] In the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. The "and / or" in the text is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0139] In some 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 execution order. 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.

[0140] 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 method. 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.

[0141] 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 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 quantification method for the degree of heterogeneous interference in asphalt pavement during ground penetrating radar detection, characterized in that, The method for quantifying the degree of heterogeneous interference in the asphalt pavement during ground penetrating radar detection includes: Respectively obtaining the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water-stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement; Respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factors of the asphalt surface layer; Respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer according to the heterogeneous interference waves of the water-stable base layer in the reflected waves at each frequency, and calculating the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factors of the water-stable base layer.

2. The method for quantifying the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection according to claim 1, characterized in that, Respectively obtaining the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water-stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves of different frequencies to the target asphalt pavement, includes: Respectively obtaining the reflected waves corresponding to different frequencies between the top of the asphalt surface layer and the bottom of the water-stable base layer when the ground penetrating radar sends electromagnetic waves with frequencies of 400 MHz, 800 MHz, 1200 MHz, and 2000 MHz to the target asphalt pavement; Respectively taking the electric field intensity of the reflected waves at each frequency as the ordinate and the travel time as the abscissa to generate the electric field intensity-travel time curves of the reflected waves at each frequency.

3. The quantization method for the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection according to claim 2, characterized in that After generating the electric field intensity-travel time curves of the reflected waves at each frequency and before respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves at each frequency, further includes: Determining the sub-wave at the top of the asphalt surface layer, the sub-wave at the interface between the asphalt surface layer and the water-stable base layer, and the sub-wave at the bottom of the water-stable base layer in the reflected waves at each frequency according to the electric field intensity-travel time curves of the reflected waves at each frequency; Determining the reflected wave between the sub-wave at the top of the asphalt surface layer and the sub-wave at the interface between the asphalt surface layer and the water-stable base layer as the heterogeneous interference wave of the asphalt surface layer; Determining the reflected wave between the sub-wave at the interface between the asphalt surface layer and the water-stable base layer and the sub-wave at the bottom of the water-stable base layer as the heterogeneous interference wave of the water-stable base layer.

4. The method for quantifying the degree of heterogeneous interference in asphalt pavement in ground penetrating radar detection according to claim 3, characterized in that, The step of respectively determining the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the heterogeneous interference waves of the asphalt surface layer in the reflected waves at each frequency, includes: Calculating the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer according to the peak time and wavelength of the sub-wave at the top of the asphalt surface layer and the peak time and wavelength of the sub-wave at the interface between the asphalt surface layer and the water-stable base layer in the reflected waves at each frequency: where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at a frequency of MHz, is the peak time of the wavelet at the top of the asphalt surface layer, is the peak time of the wavelet at the interface between the asphalt surface layer and the water-stable base layer, is the wavelength of the wavelet at the top of the asphalt surface layer, is the wavelength of the wavelet at the interface between the asphalt surface layer and the water-stable base layer, is the wavelet at the interface between the asphalt surface layer and the water-stable base layer, is the heterogeneous interference wave of the asphalt surface layer.

5. The method for quantifying the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection according to claim 4, wherein Calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the heterogeneous interference factors of the asphalt surface layer, includes: Respectively establishing a broadband heterogeneous interference continuous function of the asphalt surface layer according to the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface layer; wherein, is the broadband heterogeneous interference continuous function of the asphalt surface layer, is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at a frequency of ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at a frequency of ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at a frequency of ; is the heterogeneous interference factor of the reflected wave in the asphalt surface layer at a frequency of ; Calculating the broadband heterogeneous interference coefficient of the asphalt surface layer according to the broadband heterogeneous interference continuous function of the asphalt surface layer; Wherein, SC is the broadband heterogeneous interference coefficient of the asphalt surface layer.

6. The method for quantifying the degree of heterogeneous interference of asphalt pavement in ground-penetrating radar detection according to claim 3, characterized in that Determining the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer respectively, including: Calculating the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer according to the peak moments and wavelengths of the sub-waves at the interface between the asphalt surface course and the water-stable base layer in the reflected waves at each frequency, and the peak moments and wavelengths of the sub-waves at the bottom of the water-stable base layer: where k is the frequency of the reflected wave, is the heterogeneous interference factor of the reflected wave in the water-stabilized base course at a frequency of MHz, is the peak time of the wavelet at the interface between the asphalt surface course and the water-stabilized base course, is the peak time of the wavelet at the bottom of the water-stabilized base course, is the wavelength of the wavelet at the interface between the asphalt surface course and the water-stabilized base course, is the wavelength of the wavelet at the bottom of the water-stabilized base course, is the wavelet at the bottom of the water-stabilized base course, is the heterogeneous interference wave of the water-stabilized base course.

7. The method for quantifying the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection according to claim 6, characterized in that, Calculating the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factors of the water-stable base layer, including: Respectively establishing a broadband heterogeneous interference continuous function of the water-stable base layer according to the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer: Among them, is the broadband heterogeneous interference continuous function of the water-stable base course, is the heterogeneous interference factor of the reflected wave in the water-stable base course at the frequency of ; is the heterogeneous interference factor of the reflected wave in the water-stable base course at the frequency of ; is the heterogeneous interference factor of the reflected wave in the water-stable base course at the frequency of ; is the heterogeneous interference factor of the reflected wave in the water-stable base course at the frequency of ; Calculating the broadband heterogeneous interference coefficient of the water-stable base layer according to the broadband heterogeneous interference continuous function of the water-stable base layer: Among them, is the broadband heterogeneous interference coefficient of the water-stabilized base course.

8. The method for quantifying the heterogeneous interference degree of an asphalt pavement in ground penetrating radar detection according to claim 1, wherein: If the broadband heterogeneous interference coefficient of the asphalt surface course is larger, it is determined that the heterogeneous characteristics of the asphalt surface course interfere more with the reflected waves in ground penetrating radar detection; If the broadband heterogeneous interference coefficient of the water-stable base layer is larger, it is determined that the heterogeneous characteristics of the water-stable base layer interfere more with the reflected waves in ground penetrating radar detection.

9. A quantification device for the degree of heterogeneous interference of asphalt pavement in ground-penetrating radar detection, characterized in that, The device for quantifying the heterogeneous interference degree of an asphalt pavement in ground penetrating radar detection includes: An acquisition module, which is used to respectively acquire the reflected waves at corresponding frequencies between the top of the asphalt surface course and the bottom of the water-stable base layer of the target asphalt pavement when the ground penetrating radar sends electromagnetic waves with different frequencies to the target asphalt pavement; A first calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the asphalt surface course according to the heterogeneous interference waves of the asphalt surface course in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the asphalt surface course according to the heterogeneous interference factors of the asphalt surface course; A second calculation module, which is used to respectively determine the heterogeneous interference factors of the reflected waves at each frequency in the water-stable base layer according to the heterogeneous interference waves of the water-stable base layer in the reflected waves at each frequency, and calculate the broadband heterogeneous interference coefficient of the water-stable base layer according to the heterogeneous interference factors of the water-stable base layer.

10. The quantification device for the degree of heterogeneous interference of asphalt pavement in ground penetrating radar detection according to claim 9, characterized in that, The acquisition module is further used for: Respectively acquiring the reflected waves at corresponding frequencies between the top of the asphalt surface course and the bottom of the water-stable base layer when the ground penetrating radar sends electromagnetic waves with frequencies of 400 MHz, 800 MHz, 1200 MHz and 2000 MHz to the target asphalt pavement; Respectively taking the electric field strength of the reflected waves at each frequency as the ordinate and the travel time as the abscissa to generate the electric field strength - travel time curves of the reflected waves at each frequency.

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