Concrete erosion non-uniformity detection method and device, electronic equipment and storage medium

Abstract

The invention relates to a concrete erosion non-uniformity detection method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring at least one concrete sample; performing sound velocity testing on the concrete sample, and determining a first sound velocity before erosion and a second sound velocity after erosion; determining the damage degree of each area in the concrete sample based on the first sound velocity and the second sound velocity; wherein the injury degrees comprise mild injury, moderate injury and severe injury; and carrying out erosion performance detection on the target area with the severe damage degree, and determining an erosion non-uniformity result of the target area. Therefore, the change of the internal structure of the concrete can be intuitively and qualitatively reflected by utilizing the sound velocity change, and the damage conditions of different areas of the concrete can be accurately positioned; moreover, the erosion performance of the target area with the severe damage degree is detected, an erosion non-uniformity result is determined, the non-uniform distribution condition of internal erosion can be found, and a reliable basis is provided for engineering maintenance and repair decision making.

Description

Technical Field

[0001] The present application relates to the technical field of engineering material detection, and in particular to a method, device, electronic equipment and storage medium for detecting uneven concrete erosion. Background Art

[0002] Sulfate ion attack on concrete in sulfate environments is a key factor affecting structural durability. Because concrete's internal structural characteristics, such as porosity and aggregate distribution, significantly influence sulfate attack, the damage exhibits strong regional variations. This non-uniform distribution of damage can easily lead to stress concentration in serving structures, accelerating structural degradation and significantly increasing the risk of failure.

[0003] Currently, detection and evaluation methods for sulfate damage in concrete primarily focus on macroscopic descriptions of overall structural degradation, generally employing averaged indicators for damage assessment. This approach significantly neglects the spatial heterogeneity of concrete degradation. This approach struggles to accurately reflect the true state of structural damage, leading to significant deviations in the assessment of actual structural damage and degradation risk. This approach, in turn, fails to provide a reliable basis for decision-making regarding maintenance and repair projects, and has become a bottleneck restricting the development of concrete structure durability assessment technology.

[0004] Therefore, how to achieve rapid and precise analysis and evaluation of the unevenness of internal erosion damage in concrete is an urgent problem that needs to be solved. Summary of the Invention

[0005] Based on this, it is necessary to provide a method, device, electronic equipment and storage medium for detecting uneven concrete erosion in order to address the above technical problems.

[0006] In a first aspect, the present application provides a method for detecting uneven concrete erosion, the method comprising: obtaining at least one concrete specimen; Performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; Determining the degree of damage of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage, and severe damage; An erosion performance test is performed on the target area with the severe damage degree to determine the erosion heterogeneity result of the target area.

[0007] In one embodiment, the performing of a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion includes: Dividing the concrete sample into a plurality of acoustic testing surfaces; Performing an initial sound velocity test on each of the sound testing surfaces in the concrete sample to obtain the first sound velocity; Performing a sulfate dry-wet cycle corrosion test on the concrete sample to obtain an experimental sample; A damage sound velocity test is performed on each of the acoustic testing surfaces in the experimental sample to obtain the second sound velocity.

[0008] In one embodiment, the acoustic testing surface includes N equally spaced test lines; N is a positive integer; and determining the damage degree of each area in the concrete sample based on the first sound velocity and the second sound velocity includes: Determining the jth initial dynamic elastic modulus before erosion according to the first sound velocity corresponding to the jth test line; wherein j is a positive integer and is less than or equal to N; determining a j-th damage dynamic elastic modulus after erosion according to the second sound velocity corresponding to the test line; Determining the damage range of the acoustic testing surface according to the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli; Determining a damage parameter interval according to the damage range; Matching the first to Nth erosion damage indicators with the damage parameter interval to determine the damage degree of each area in the acoustic testing surface; The damage degree of each area in the concrete sample is determined according to the damage degree of each area in each acoustic testing surface.

[0009] In one embodiment, determining the damage range of the acoustic testing surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli includes: According to the jth initial dynamic elastic modulus and the jth damage dynamic elastic modulus, the jth erosion damage index is determined; The damage range is determined based on the maximum and minimum values ​​of the 1st to Nth erosion damage indicators of the acoustic testing surface.

[0010] In one embodiment, the performing of erosion performance testing on the target area with the severe damage to determine the erosion heterogeneity result of the target area includes: Obtaining an initial structural image of the concrete sample before corrosion, a damaged structural image after corrosion, a diffusion coefficient of the concrete, a critical sulfate concentration, and sulfate ion content in the external environment; wherein the critical sulfate concentration represents the maximum sulfate ion content consumed per unit concrete support; determining a current corrosion depth of the concrete sample according to the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; determining an erosion range in the concrete sample according to the current erosion depth; Extracting the target initial structure image before erosion and the target damaged structure image after erosion corresponding to the erosion range; Calculating an average pore damage index and a target pore damage index of the target area according to the target initial structure image and the target damaged structure image; The erosion heterogeneity result is determined according to the average pore damage index and the target pore damage index.

[0011] In one embodiment, the calculating, based on the target initial structure image and the target damaged structure image, the average pore damage index and the target pore damage index of the target area respectively, comprises: determining a first porosity within the erosion range before erosion and a second porosity of the target area according to the target initial structure image; determining a third porosity within the eroded range and a fourth porosity of the target area after erosion according to the target damaged structure image; determining the average pore damage index according to the first porosity and the third porosity; The target pore damage index is determined according to the first porosity, the second porosity, and the fourth porosity.

[0012] In one embodiment, the method further comprises: In response to a request to display an erosion detection interface, display the erosion detection interface; wherein the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be detected; When a selection operation of a target concrete sample is received through the sample selection control, the damage degree of each area in the target concrete sample and / or the erosion unevenness result of the target area are displayed according to the selection operation.

[0013] In a second aspect, the present application further provides a device for detecting uneven concrete erosion, the device comprising: An acquisition module, configured to acquire at least one concrete sample; an ultrasonic detection module, configured to perform a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; a determination module, configured to determine the degree of damage of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage, and severe damage; The performance detection module is used to perform erosion performance detection on the target area with the severe damage degree to determine the erosion unevenness result of the target area.

[0014] In a third aspect, the present application also provides an electronic device comprising a processor and a memory for storing a computer program for the processor; wherein the processor is configured to: when executing the computer program, implement the steps of the method execution described in any embodiment of the present application.

[0015] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method execution described in any embodiment of the present application.

[0016] The aforementioned method for detecting uneven concrete erosion, on the one hand, utilizes changes in sound velocity by obtaining concrete specimens and performing sound velocity tests before and after erosion, enabling a direct and qualitative reflection of changes in the concrete's internal structure. Classifying the degree of damage into mild, moderate, and severe allows for more precise localization of damage in different areas of the concrete compared to vague, general assessment methods. Furthermore, severely damaged areas are often the most vulnerable parts of the structure and most prone to safety issues. By performing erosion performance tests on target areas with severe damage and determining their uneven erosion results, the uneven distribution of erosion within the structure can be identified, providing a reliable basis for decision-making regarding maintenance and repair projects. Furthermore, quantitative analysis of all damaged areas within the concrete specimen is unnecessary, saving resources and improving detection efficiency. Furthermore, timely identification of severely damaged areas and uneven erosion within concrete structures allows for preventive measures to be taken, reducing safety incidents caused by increased structural damage and safeguarding life and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of a method for detecting uneven concrete corrosion according to an exemplary embodiment; Figure 2 is a schematic diagram showing the division of the acoustic testing surface in a concrete sample according to an exemplary embodiment; Figure 3 is a schematic diagram showing a test line on an acoustic testing surface according to an exemplary embodiment; Figure 4 is a schematic diagram showing the division of the acoustic testing surface area according to an exemplary embodiment; Figure 5 is a schematic diagram of an image of a damaged structure after erosion according to an exemplary embodiment; Figure 6 is a schematic diagram showing the partitioning of a severely damaged area of ​​a concrete specimen according to an exemplary embodiment; Figure 7 is a schematic diagram showing the damage degree of each area in each acoustic testing surface according to an exemplary embodiment; Figure 8 is a schematic diagram showing uneven corrosion of a concrete sample according to an exemplary embodiment; Figure 9 is a structural block diagram of a device for detecting uneven concrete erosion according to an exemplary embodiment; Figure 10 It is a diagram showing the internal structure of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The terms "first", "second" and "third" in the embodiments of the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, method, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0019] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] In some embodiments, the concrete erosion unevenness detection method provided in the embodiments of the present application can be applied to an electronic device or a cloud server. The electronic device can be any mobile terminal or fixed terminal. The terminal can be a device that provides voice and / or data connectivity to a user. For example, the terminal can be an Internet of Things terminal, such as a sensor device, a mobile phone or so-called "cellular" phone, and a computer with an Internet of Things terminal, for example, a fixed, portable, pocket-sized, handheld, or computer-built-in device. The cloud server can be any virtualized computing resource or physical server cluster. The server can be a platform that provides on-demand, scalable computing, storage, network, and application services to users.

[0021] In some embodiments, as Figure 1 As shown, a method for detecting uneven corrosion of concrete is provided, the method comprising the following steps: S101, obtaining at least one concrete sample.

[0022] In one embodiment, a concrete sample of a predetermined proportion is prepared according to a predetermined concrete mix ratio. The concrete sample of the predetermined proportion can be a cylindrical sample with a diameter of 5 centimeters (cm) and a height of 10 cm, or a cubic sample with a length, width, and height of 10 cm. Standard curing is performed in accordance with the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" GB / T 50081-2019. After curing for 28 days, the concrete sample is removed from the curing chamber and cleaned of residual moisture and dirt on the surface. The concrete sample is dried in an oven and then cooled to room temperature to ensure that the concrete sample is dry and clean.

[0023] S102: Perform a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion.

[0024] In some embodiments, ultrasonic testing, a core technology in the field of non-destructive testing, is based on the theory of sound wave propagation. A signal generator within a testing instrument (such as a non-metallic ultrasonic tester) generates an electrical signal of a specific frequency and waveform. This electrical signal is transmitted to an ultrasonic transducer connected to the instrument. Using the piezoelectric effect, it is converted into ultrasonic waves, which are then transmitted toward the concrete component being tested. After propagating through the concrete medium, the ultrasonic waves are captured by a receiving probe. By accurately analyzing ultrasonic test parameters such as velocity, amplitude, and frequency, the strength grade and internal integrity of the concrete material can be effectively inferred. When concrete is attacked by sulfates, the propagation of internal cracks changes its internal structure, which in turn alters the medium sound velocity test parameter during ultrasonic testing. By comparing the initial sound velocity before attack with the second sound velocity after attack, qualitative damage detection can be achieved to characterize the corresponding concrete properties.

[0025] In some embodiments, performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion includes: Dividing the concrete sample into a plurality of acoustic testing surfaces; Performing an initial sound velocity test on each of the sound testing surfaces in the concrete sample to obtain the first sound velocity; Performing a sulfate dry-wet cycle corrosion test on the concrete sample to obtain an experimental sample; A damage sound velocity test is performed on each of the acoustic testing surfaces in the experimental sample to obtain the second sound velocity.

[0026] In one embodiment, Figure 2 As shown, the concrete sample is a cylinder with a height of 10 cm. Acoustic testing surfaces are arranged along the axis of the cylinder, for example, four acoustic testing surfaces H1, H2, H3 and H4 are arranged at equal intervals of 2 cm. Before the acoustic testing, butter or vaseline is used as a coupling agent to evenly coat each acoustic testing surface. Each acoustic testing surface in the concrete sample is tested layer by layer in sequence using a non-metallic ultrasonic instrument to obtain multiple first sound velocities. After the initial test is completed, the coupling agent remaining on the surface of the concrete sample is cleaned, and a sulfate dry-wet cyclic corrosion test is performed according to the concrete sulfate corrosion resistance test method specified in the "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete" GB / T 50082-2024 to obtain an experimental sample. After the corrosion test, a damage sound velocity test is performed on each acoustic testing surface in the experimental sample to obtain multiple second sound velocities.

[0027] S103: Determine the damage degree of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the damage degree includes mild damage, moderate damage, and severe damage.

[0028] In some embodiments, the acoustic testing surface includes N equally spaced test lines; N is a positive integer; and determining the degree of damage in each area of ​​the concrete sample based on the first sound velocity and the second sound velocity includes: Determining the jth initial dynamic elastic modulus before erosion according to the first sound velocity corresponding to the jth test line; wherein j is a positive integer and is less than or equal to N; determining a j-th damage dynamic elastic modulus after erosion according to the second sound velocity corresponding to the test line; Determining the damage range of the acoustic testing surface according to the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli; Determining a damage parameter interval according to the damage range; Matching the first to Nth erosion damage indicators with the damage parameter interval to determine the damage degree of each area in the acoustic testing surface; The damage degree of each area in the concrete sample is determined according to the damage degree of each area in each acoustic testing surface.

[0029] In one embodiment, Figure 3 As shown, Figure 3 Schematic diagram of the test line on the acoustic test surface. Select any position as the measurement starting point M1 on the first acoustic test surface 1 , set the measurement points M1 on the acoustic test surface in a clockwise direction and at equal intervals according to the preset number 2 , M1 3 ,…,M1 18 The preset number of measurement points can be changed, for example, it can also be 24, 30, etc. Based on two measurement points spaced 180° apart, 9 test lines L1, L2, ..., L9 are formed passing through the center of the first acoustic testing surface. For other acoustic testing surfaces, the measurement points and test lines are marked according to the circumferential positions corresponding to the measurement points on the first acoustic testing surface. With the test line as the center line, the acoustic testing surface is divided into multiple areas at equal intervals based on the predetermined number of measurement points, for example, Figure 4 As shown, Figure 4 This is a schematic diagram of the acoustic testing area division, with a predetermined number of 18.

[0030] In one embodiment, during the sound velocity test, the center of the transducer is aligned with the measurement points at both ends of the test line, and initial sound testing is performed on each test line in turn to obtain first sound velocities corresponding to the multiple test lines.

[0031] In the embodiment of the present application, when ultrasonic waves propagate in solid materials such as concrete samples, the propagation speed of the longitudinal wave (compression wave) is closely related to the dynamic elastic modulus, density and Poisson's ratio of the material; the dynamic elastic modulus can be determined by inversely deducing the dynamic elastic modulus through the longitudinal wave velocity of the concrete.

[0032] In some embodiments, determining the damage range of the acoustic testing surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli includes: According to the jth initial dynamic elastic modulus and the jth damage dynamic elastic modulus, the jth erosion damage index is determined; The damage range is determined based on the maximum and minimum values ​​of the 1st to Nth erosion damage indicators of the acoustic testing surface.

[0033] For example, the electronic device may determine the erosion damage index based on the jth initial dynamic elastic modulus and the jth damage dynamic elastic modulus; wherein j is a positive integer; a calculation method for determining the erosion damage index is as follows: ; in, Indicates the jth initial dynamic elastic modulus in the i-th acoustic testing surface; Indicates the dynamic elastic modulus of the jth damage in the i-th acoustic testing surface; Indicates the first sound velocity corresponding to the jth test line in the i-th sound testing surface; Indicates the second sound velocity corresponding to the j-th test line in the i-th sound testing surface.

[0034] In one embodiment, the damage range is determined based on the maximum and minimum values ​​of the 1st to Nth erosion damage indicators in the i-th acoustic testing surface. For example, a method for calculating the damage range is as follows: ; in, Indicates the maximum value in the set of erosion damage indicators; Indicates the minimum value in the set of erosion damage indicators.

[0035] In one embodiment, the electronic device compares the damage range with a preset range to determine the measurement surface type of each acoustic measurement surface; sorts the 1st to Nth (all) erosion damage indicators in the same measurement surface in a predetermined order (e.g., from small to large), and divides the damage parameter interval proportionally according to the measurement surface type; matches the jth erosion damage indicator with the damage parameter interval to determine the damage level of the area corresponding to the jth erosion damage indicator; and so on, determines the damage level of each area in the acoustic measurement surface.

[0036] For example, as shown in Table 1 below, which illustrates damage area classification, if the damage range of the first acoustic measurement surface is between 0.5 and 1, the first acoustic measurement surface can be determined as a bipartite measurement surface, with the damage areas within the first acoustic measurement surface comprising a mildly damaged area and a moderately damaged area. The electronic device can match the jth erosion damage indicator with the damage parameter range representing each damaged area, and determine the damage level of the successfully matched damaged area as the damage level of the area corresponding to the jth erosion damage indicator.

[0037] Table 1

[0038] In one embodiment, the electronic device can evaluate the overall heterogeneity of the concrete sample according to the superposition method, as shown in Table 2 below, which is a schematic table of damage area assignments; the damage assignments of the test lines corresponding to the same position (with the same numbering principle) in multiple acoustic testing surfaces are sequentially superimposed to obtain target assignments; the target damage area is divided according to the multiple target assignments included in the concrete sample, as shown in Table 3 below, which is a schematic table of target damage area division; the electronic device can determine the degree of damage of the three-dimensional area corresponding to the test line at the same position in multiple acoustic testing surfaces of the concrete sample based on the target assignments and the target damage area.

[0039] Table 2

[0040] Table 3

[0041] By dividing the concrete specimen into multiple acoustic measurement surfaces, the previous method of testing the entire specimen has been changed, enabling acquisition of sound velocity data from different angles and regions. In large concrete components, different parts are subject to varying stresses and environmental influences. By dividing the acoustic measurement surfaces, the spatial variations in sound velocity within the concrete can be captured in greater detail, thus comprehensively and accurately reflecting the performance status of each area of ​​the concrete specimen and avoiding the omission of local defects due to overall testing.

[0042] S104: performing an erosion performance test on the target area with the severe damage degree to determine an erosion heterogeneity result of the target area.

[0043] In one embodiment, the electronic device can screen out the target area with severe damage (i.e., the key erosion damage area) through multi-point ultrasonic testing, and perform erosion performance testing on the target area with severe damage, so as to determine the structural characteristic indicators, damage characteristic indicators, and protection characteristic indicators of the target area; based on at least one of the structural characteristic indicators, damage characteristic indicators, and protection characteristic indicators, determine the erosion unevenness results of the target area.

[0044] In one embodiment, the electronic device can screen out target areas with severe damage through multi-point ultrasonic testing, and use X-CT to precisely measure the erosion damage in the target areas with severe damage, for example, by precisely analyzing the pore contents of the target areas with severe damage. In this way, by combining ultrasonic testing and X-CT scanning, a rapid and precise analysis and evaluation of the heterogeneity of erosion damage inside concrete can be achieved.

[0045] The aforementioned method for detecting uneven concrete erosion, on the one hand, utilizes changes in sound velocity by obtaining concrete specimens and performing sound velocity tests before and after erosion, enabling a direct and qualitative reflection of changes in the concrete's internal structure. Classifying the degree of damage into mild, moderate, and severe allows for more precise localization of damage in different areas of the concrete compared to vague, general assessment methods. Furthermore, severely damaged areas are often the most vulnerable parts of the structure and most prone to safety issues. By performing erosion performance tests on target areas with severe damage and determining their uneven erosion results, the uneven distribution of erosion within the structure can be identified, providing a reliable basis for decision-making regarding maintenance and repair projects. Furthermore, quantitative analysis of all damaged areas within the concrete specimen is unnecessary, saving resources and improving detection efficiency. Furthermore, timely identification of severely damaged areas and uneven erosion within concrete structures allows for preventive measures to be taken, reducing safety incidents caused by increased structural damage and safeguarding life and property.

[0046] In some embodiments, performing erosion performance testing on the target area with the severe damage degree to determine the erosion heterogeneity result of the target area includes: Obtaining an initial structural image of the concrete sample before corrosion, a damaged structural image after corrosion, a diffusion coefficient of the concrete, a critical sulfate concentration, and sulfate ion content in the external environment; wherein the critical sulfate concentration represents the maximum sulfate ion content consumed per unit concrete support; determining a current corrosion depth of the concrete sample according to the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; determining an erosion range in the concrete sample according to the current erosion depth; Extracting the target initial structure image before erosion and the target damaged structure image after erosion corresponding to the erosion range; Calculating an average pore damage index and a target pore damage index of the target area according to the target initial structure image and the target damaged structure image; The erosion heterogeneity result is determined according to the average pore damage index and the target pore damage index.

[0047] In one embodiment, the electronic device can use X-CT scanning testing technology to obtain an initial structural image of the concrete sample before erosion; use X-CT scanning testing technology to obtain a damaged structural image of the experimental sample after erosion; estimate the diffusion range of the erosion source during the erosion process based on Fick's second law and delineate the erosion damage image area; determine the current erosion depth of the concrete sample after erosion time t based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; the erosion range in the concrete sample can be determined based on the current erosion depth; extract a target initial structural image within the erosion range before erosion from the initial structural image, and extract a target damaged structural image within the erosion range after erosion from the damaged structural image; determine the porosity of the concrete sample based on the target initial structural image and the target damaged structural image; calculate the average pore damage index and the target pore damage index of the target area with severe damage based on the porosity, and determine the heterogeneity result of the target area based on the average pore damage index and the target pore damage index.

[0048] For example, Figure 5 As shown, Figure 5 A schematic diagram of a damaged structure image after erosion. A method for calculating the current erosion depth of a concrete sample after erosion for time t is: ;in, Indicates the diffusion coefficient of concrete; Indicates critical sulfate concentration; Indicates the sulfate ion content in the external environment.

[0049] In one embodiment, the electronic device may determine a first ratio based on a ratio of a target pore damage index to an average pore damage index; and compare the first ratio with a reference threshold to determine an erosion heterogeneity result.

[0050] Exemplarily, a method for determining the first ratio is: ;in, Indicates target pore damage indicators; Indicates the average porosity damage index.

[0051] For example, when the first ratio is greater than or equal to 2, the erosion unevenness result can be considered to be extremely severe damage unevenness; when the first ratio is greater than or equal to 1.5 and less than 2, the erosion unevenness result can be considered to be severe damage unevenness; when the first ratio is greater than or equal to 1 and less than 1.5, the erosion unevenness result can be considered to be relatively severe damage unevenness.

[0052] In the embodiments of this application, the degree of damage to the specimen is quantified by extracting structural images before and after erosion and calculating the pore characteristics before and after damage. Based on the diffusion law of concrete erosion, the erosion range is delineated based on the current erosion depth. Combined with the damage evaluation analysis formed by ultrasonic testing, a targeted and precise analysis of the pore characteristics of the local high-damage area is achieved. By comparing the pore damage of the local high-damage area with the overall pore damage of the specimen, an accurate quantitative characterization of the damage heterogeneity is achieved, which is conducive to the subsequent accurate early warning of structural risks.

[0053] In some embodiments, respectively calculating the average pore damage index and the target pore damage index of the target area based on the target initial structure image and the target damaged structure image includes: determining a first porosity within the erosion range before erosion and a second porosity of the target area according to the target initial structure image; determining a third porosity within the eroded range and a fourth porosity of the target area after erosion according to the target damaged structure image; determining the average pore damage index according to the first porosity and the third porosity; The target pore damage index is determined according to the first porosity, the second porosity, and the fourth porosity.

[0054] For example, a method for determining the average pore damage index is: ;in, indicating a first porosity; Indicates the third porosity.

[0055] In one embodiment, the electronic device can divide the target area into two centrally symmetrical sub-areas and calculate the target pore damage index corresponding to the two sub-areas respectively. One method for determining the target pore damage index is: ;in, indicating a first porosity; indicating a second porosity; Indicates the fourth porosity

[0056] For example, Figure 6 As shown, Figure 6 The target area (severely damaged area) L8 is divided into two centrally symmetrical sub-areas L 81 and L 82 .

[0057] In the embodiment of the present application, the average pore damage index can be used to characterize the average damage situation in the entire erosion range, and the target pore damage index can be used to focus on the target area with severe damage, which makes it easier to discover the degree of local degradation and unevenness, achieves accurate measurement of erosion unevenness, and traces back to the cause of the unevenness.

[0058] In some embodiments, the method further comprises: In response to a request to display an erosion detection interface, display the erosion detection interface; wherein the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be detected; When a selection operation of a target concrete sample is received through the sample selection control, the damage degree of each area in the target concrete sample and / or the erosion unevenness result of the target area are displayed according to the selection operation.

[0059] In one embodiment, the damage degree of each region in the target concrete sample and / or the erosion unevenness result of the target region may be displayed in text form, graphic form, curve form and / or list form.

[0060] In one embodiment, the erosion detection interface includes multiple concrete samples. When a user wants to view the erosion unevenness results for a specific concrete sample, the user can select it by clicking on the sample selection control, thereby viewing the damage degree of each area in the selected target concrete sample on the erosion detection interface; when there is a target area with severe damage in the target concrete sample, the user can further choose whether to view the erosion unevenness results of the target area; it can also support the simultaneous selection of multiple samples to achieve horizontal comparison of erosion unevenness.

[0061] In the embodiment of the present application, a visual erosion detection interface is provided to allow the user to conveniently select the concrete sample to be tested and view the degree of damage in each area and the erosion unevenness results, thereby facilitating the user to intuitively analyze the erosion unevenness of the concrete sample.

[0062] In the embodiments of the present application, the following provides specific examples in combination with any of the above embodiments: Specific example 1: 1) Prepare concrete samples according to the predetermined mix ratio, as shown in Table 4 below. Table 4 is a schematic table of concrete mix ratios.

[0063] Table 4

[0064] The concrete sample was divided into four acoustic test surfaces, and the concrete sample was subjected to 180 strong dry-wet cycles of 10% mass fraction Na2SO4 solution. The specific cycle operation method was referred to the "Standard for Test Methods for Long-term Properties and Durability of Concrete" GB / T 50082-2024 to obtain the experimental sample.

[0065] 2) Based on the experimental samples, the erosion damage index of each test line in each acoustic test surface is determined, as shown in Table 5 below. Table 5 is a schematic table of the erosion damage index of the experimental samples.

[0066] Table 5

[0067] 3) Based on the erosion damage index of each test line in each acoustic testing surface, calculate the damage range of each acoustic testing surface and determine the testing surface type of each acoustic testing surface; as shown in Table 6 below, Table 6 is a schematic table of the erosion damage index and testing surface type of each acoustic testing surface.

[0068] Table 6

[0069] 4) Sort all erosion damage indicators on the same measurement surface in a predetermined order (e.g., from small to large), and divide the damage parameter intervals proportionally according to the measurement surface type, as shown in Table 7 below. Table 7 is a schematic table of damage parameter intervals for each acoustic measurement surface.

[0070] Table 7

[0071] 5) Match each erosion damage index with the damage parameter interval to determine the damage degree of the area corresponding to each erosion damage index, that is, determine the damage degree of each area in the acoustic testing surface; Figure 7 As shown, Figure 7 Schematic diagram of the damage degree of each area in each acoustic testing surface.

[0072] 6) Superimpose the damage values ​​of the test lines with the same number on each acoustic test surface according to the superposition method to determine the target value; as shown in Table 8 below, Table 8 is a schematic diagram of the target value calculation.

[0073] Table 8

[0074] 7) Divide the target damage area according to the multiple target values ​​included in the concrete specimen, and determine the damage degree of the three-dimensional area corresponding to the test line at the same position in multiple acoustic test surfaces of the concrete specimen based on the target values ​​and the target damage area, that is, the damage degree of each area in the concrete specimen; Figure 8 As shown, Figure 8 Schematic diagram of the uneven corrosion of concrete specimens.

[0075] 8) Obtain the initial structural image of the concrete sample before erosion and the damaged structural image after erosion, and calculate the concrete diffusion coefficient based on the water-cement ratio 6.42*10 -13 m 2 / s, critical sulfate concentration 339 mol / m 3 , sulfate ion content in the external environment 705 mol / m 3 and the erosion time t is 180d (6220800s).

[0076] 9) Determine the current corrosion depth X of the concrete sample based on the concrete diffusion coefficient, critical sulfate concentration, and sulfate ion content in the external environment. D =4.1mm.

[0077] 10) The total volume of the concrete specimen is 196350mm 3 ; As shown in Table 9 below, Table 9 is a schematic table of pore volume; According to the target assignment, it can be determined that there is a severely damaged area L8 in the concrete sample as the target area; Figure 6 As shown, the target area is divided into two centrally symmetrical sub-areas L 81 and L 82 .

[0078] Table 9

[0079] 11) Determine the average pore damage index of concrete specimens is 2.48, and the target pore damage indices of the two sub-areas in the target area are According to the target pore damage index and the average pore damage index, the first ratios of the two sub-areas can be determined as ; then the sub-region L in the target area can be determined81 The erosion unevenness results are severe damage unevenness, sub-area L 82 The result of erosion unevenness is that the damage unevenness is more serious.

[0080] In the embodiments of the present application, on the one hand, by obtaining concrete samples and conducting sound velocity tests before and after erosion, the change in sound velocity can be used to intuitively and qualitatively reflect the changes in the internal structure of the concrete. The degree of damage is divided into mild, moderate and severe, which can more accurately locate the damage in different areas of the concrete compared to vague and general evaluation methods. On the other hand, severely damaged areas are often the most fragile parts of the structure and the parts most prone to safety problems. By conducting erosion performance tests on target areas with severe damage and determining their erosion unevenness results, the uneven distribution of internal erosion can be discovered, providing a reliable basis for engineering maintenance and repair decisions. Moreover, there is no need to conduct quantitative analysis of all damaged areas in the concrete sample, which saves resource consumption and improves detection efficiency. In addition, timely discovery of severely damaged areas and erosion unevenness in concrete structures allows preventive measures to be taken in advance to reduce safety accidents caused by increased structural damage and protect life and property.

[0081] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0082] Based on the same inventive concept, embodiments of the present application also provide a device for detecting uneven concrete erosion, for implementing the aforementioned method for detecting uneven concrete erosion. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the device for detecting uneven concrete erosion provided below can be found in the aforementioned definition of the method for detecting uneven concrete erosion, and will not be further elaborated here.

[0083] In one embodiment, Figure 9 As shown, a device for detecting uneven concrete erosion is provided, the device comprising: An acquisition module 10, configured to acquire at least one concrete sample; an ultrasonic detection module 20 for performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; a determination module 30 for determining a damage degree of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the damage degree includes mild damage, moderate damage, and severe damage; The performance detection module 40 is configured to perform an erosion performance detection on the target area with the severe damage degree, and determine an erosion heterogeneity result of the target area.

[0084] In one embodiment, the ultrasonic detection module 20 includes: A dividing unit, used for dividing the concrete sample into a plurality of acoustic testing surfaces; a first acoustic testing unit, configured to perform an initial acoustic velocity test on each acoustic testing surface in the concrete sample to obtain the first acoustic velocity; an erosion test unit, used for performing a sulfate dry-wet cycle erosion test on the concrete sample to obtain an experimental sample; The second acoustic testing unit is used to perform a damage sound velocity test on each of the acoustic testing surfaces in the experimental sample to obtain the second sound velocity.

[0085] In one embodiment, the acoustic testing surface includes N equally spaced test lines; N is a positive integer; the determining module 30 includes: a first calculation unit, configured to determine a j-th initial dynamic elastic modulus before erosion based on the first sound velocity corresponding to the j-th test line; wherein j is a positive integer and is less than or equal to N; a second calculation unit, configured to determine a j-th damage dynamic elastic modulus after erosion based on the second sound velocity corresponding to the test line; a third calculating unit, configured to determine the damage range of the acoustic testing surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli; A fourth calculation unit, configured to determine a damage parameter interval according to the damage range; a first determining unit, configured to match the first to Nth erosion damage indicators with the damage parameter interval to determine the damage degree of each area in the acoustic testing surface; The second determining unit is configured to determine the damage degree of each area in the concrete sample according to the damage degree of each area in each acoustic testing surface.

[0086] In one embodiment, the first determining unit is configured to perform at least one of the following steps: According to the jth initial dynamic elastic modulus and the jth damage dynamic elastic modulus, the jth erosion damage index is determined; The damage range is determined based on the maximum and minimum values ​​of the 1st to Nth erosion damage indicators of the acoustic testing surface.

[0087] In one embodiment, the performance detection module 40 includes: an acquisition unit, configured to acquire an initial structural image of the concrete sample before corrosion, a damaged structural image after corrosion, a diffusion coefficient of the concrete, a critical sulfate concentration, and sulfate ion content in the external environment; wherein the critical sulfate concentration represents the maximum sulfate ion content consumed per unit concrete support; a depth determination unit, configured to determine a current corrosion depth of the concrete sample based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; a range determination unit, configured to determine a range of corrosion in the concrete sample based on the current corrosion depth; An extraction unit, configured to extract a target initial structure image before erosion and a target damaged structure image after erosion corresponding to the erosion range; an index calculation unit, configured to calculate an average pore damage index and a target pore damage index of the target area according to the target initial structure image and the target damaged structure image; The heterogeneity determination unit is configured to determine the erosion heterogeneity result according to the average pore damage index and the target pore damage index.

[0088] In one embodiment, the indicator calculation unit is configured to perform the following steps: determining a first porosity within the erosion range before erosion and a second porosity of the target area according to the target initial structure image; determining a third porosity within the eroded range and a fourth porosity of the target area after erosion according to the target damaged structure image; determining the average pore damage index according to the first porosity and the third porosity; The target pore damage index is determined according to the first porosity, the second porosity, and the fourth porosity.

[0089] In one embodiment, the apparatus further comprises: a display module, configured to display the erosion detection interface in response to a display request of the erosion detection interface; wherein the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be detected; The display module is configured to display the damage degree of each region in the target concrete sample and / or the erosion unevenness result of the target region according to the selection operation when a selection operation of the target concrete sample is received through the sample selection control.

[0090] Each module in the above-mentioned concrete erosion unevenness detection device can be implemented in whole or in part by software, hardware, or a combination thereof. The above-mentioned modules can be embedded in or independent of the processor of the electronic device in the form of hardware, or can be stored in the memory of the electronic device in the form of software, so that the processor can call and execute the corresponding operations of the above-mentioned modules.

[0091] In one embodiment, an electronic device is provided, whose internal structure diagram can be as follows: Figure 10 As shown. The electronic device includes a processor, memory, a communication interface, a display unit, and an input device connected via a method bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating method and a computer program. The internal memory provides an environment for the operation of the operating method and computer program in the non-volatile storage medium. The communication interface of the electronic device is used to communicate with an external terminal via wired or wireless communication. The wireless communication method can be achieved through Wi-Fi, a mobile cellular network, NFC (near field communication), or other technologies. When executed by the processor, the computer program implements an image processing method. The display screen of the electronic device can be a liquid crystal display or an electronic ink display screen. The input device of the electronic device can be a touch layer covering the display screen, or keys, a trackball, or a touchpad provided on the electronic device housing, or an external keyboard, touchpad, or mouse.

[0092] Those skilled in the art will understand that Figure 10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0093] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0094] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps performed by a processor of an electronic device when the computer program is executed by a processor.

[0095] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0096] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), compilable logic units, data processing logic units based on quantum computing, and the like.

[0097] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for detecting uneven concrete erosion, characterized in that: The method comprises: obtaining at least one concrete specimen; Performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; Determining the degree of damage of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage, and severe damage; An erosion performance test is performed on the target area with the severe damage degree to determine the erosion heterogeneity result of the target area.

2. The method according to claim 1, characterized in that The performing of a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion includes: Dividing the concrete sample into a plurality of acoustic testing surfaces; Performing an initial sound velocity test on each of the sound testing surfaces in the concrete sample to obtain the first sound velocity; Performing a sulfate dry-wet cycle corrosion test on the concrete sample to obtain an experimental sample; A damage sound velocity test is performed on each of the acoustic testing surfaces in the experimental sample to obtain the second sound velocity.

3. The method according to claim 2, characterized in that The acoustic testing surface includes N equally spaced test lines; N is a positive integer; and determining the damage degree of each area in the concrete sample based on the first sound velocity and the second sound velocity includes: Determining the jth initial dynamic elastic modulus before erosion according to the first sound velocity corresponding to the jth test line; wherein j is a positive integer and is less than or equal to N; determining a j-th damage dynamic elastic modulus after erosion according to the second sound velocity corresponding to the test line; Determining the damage range of the acoustic testing surface according to the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli; Determining a damage parameter interval according to the damage range; Matching the first to Nth erosion damage indicators with the damage parameter interval to determine the damage degree of each area in the acoustic testing surface; The damage degree of each area in the concrete sample is determined according to the damage degree of each area in each acoustic testing surface.

4. The method according to claim 3, characterized in that Determining the damage range of the acoustic testing surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli includes: According to the jth initial dynamic elastic modulus and the jth damage dynamic elastic modulus, the jth erosion damage index is determined; The damage range is determined based on the maximum and minimum values ​​of the 1st to Nth erosion damage indicators of the acoustic testing surface.

5. The method according to claim 1, wherein The performing of erosion performance testing on the target area with the severe damage degree to determine the erosion heterogeneity result of the target area includes: Obtaining an initial structural image of the concrete sample before corrosion, a damaged structural image after corrosion, a diffusion coefficient of the concrete, a critical sulfate concentration, and sulfate ion content in the external environment; wherein the critical sulfate concentration represents the maximum sulfate ion content consumed per unit concrete support; determining a current corrosion depth of the concrete sample according to the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; determining an erosion range in the concrete sample according to the current erosion depth; Extracting the target initial structure image before erosion and the target damaged structure image after erosion corresponding to the erosion range; Calculating an average pore damage index and a target pore damage index of the target area according to the target initial structure image and the target damaged structure image; The erosion heterogeneity result is determined according to the average pore damage index and the target pore damage index.

6. The method according to claim 5, characterized in that Calculating the average pore damage index and the target pore damage index of the target area respectively based on the target initial structure image and the target damaged structure image includes: determining a first porosity within the erosion range before erosion and a second porosity of the target area according to the target initial structure image; determining a third porosity within the eroded range and a fourth porosity of the target area after erosion according to the target damaged structure image; determining the average pore damage index according to the first porosity and the third porosity; The target pore damage index is determined according to the first porosity, the second porosity, and the fourth porosity.

7. The method according to claim 1, characterized in that The method further comprises: In response to a request to display an erosion detection interface, display the erosion detection interface; wherein the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be detected; When a selection operation of a target concrete sample is received through the sample selection control, the damage degree of each area in the target concrete sample and / or the erosion unevenness result of the target area are displayed according to the selection operation.

8. A device for detecting uneven corrosion of concrete, characterized in that: The device comprises: An acquisition module, configured to acquire at least one concrete sample; an ultrasonic detection module, configured to perform a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; a determination module, configured to determine the degree of damage of each region in the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage, and severe damage; The performance detection module is used to perform erosion performance detection on the target area with the severe damage degree to determine the erosion unevenness result of the target area.

9. An electronic device, characterized in that: The method comprises a processor and a memory for storing a computer program of the processor; wherein the processor is configured to implement the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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