Test system based on concrete setting

Abstract

This invention relates to the field of concrete testing technology, and more particularly to a testing system based on concrete setting, comprising: an image acquisition module for acquiring images of the interior of concrete during the setting stage; an image processing module for extracting images of internal air bubbles and internal cracks; an air bubble analysis module for determining whether the distribution of air bubbles inside the concrete is acceptable based on air bubble characterization parameters, and determining whether the air bubble escape trend is stable; a scanning cycle adjustment module for reducing the preset scanning cycle with a preset scanning cycle adjustment coefficient; a crack analysis module for determining whether the degree of crack formation inside the concrete is within a reasonable range based on a crack comprehensive index, and determining whether the crack propagation direction trend is stable; and a joint analysis module for determining whether crack formation and air bubble aggregation are correlated based on an overlap index, and determining whether air bubble escape guides crack propagation. This invention improves the accuracy of concrete setting testing.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, and more particularly to a testing system based on concrete setting. Background Technology

[0002] Concrete setting is a crucial process in which concrete gradually hardens from its plastic state, directly affecting its workability and final mechanical properties. The setting process is divided into two stages: initial setting and final setting. During initial setting, concrete begins to lose its plasticity but can still be molded; during final setting, it is completely hardened. Air bubbles and cracks are important microstructural features during this process. The presence of air bubbles can improve the freeze-thaw resistance and durability of concrete, but excessive air bubbles can reduce density and strength. Cracks, usually caused by shrinkage, temperature stress, or external loads, can become channels for moisture and harmful substances to penetrate, affecting durability.

[0003] Chinese Patent Application Publication No. CN114136839A discloses a testing device and method for concrete setting state. The testing device includes a tension / compression force gauge, a test probe, and a positioning test plate. The positioning test plate has several test holes. One end of the test probe is fixedly connected to the tension / compression force gauge, and the other end contacts the concrete component being tested through one of the test holes in the positioning test plate. The testing method is as follows: the positioning test plate is placed at the center of the component, the test probe is installed on the tension / compression force gauge, passes through the positioning test plate, and contacts the concrete surface to be tested, ensuring that the test probe is always perpendicular to the concrete surface. Pressure is applied evenly until the test probe is fully embedded in the concrete, the maximum value is read, the average value is calculated, and a representative value is obtained. However, the prior art has the following problems: the existing technology for testing the concrete setting stage mainly relies on simple physical testing methods, such as the penetration resistance method or ultrasonic testing. These methods cannot comprehensively assess the microstructural characteristics inside the concrete, resulting in low accuracy in concrete setting tests. Summary of the Invention

[0004] To address this issue, the present invention provides a concrete setting test system to overcome the problem that existing technologies cannot fully assess the microstructural characteristics of concrete, resulting in low accuracy in concrete setting tests.

[0005] To achieve the above objectives, the present invention provides a testing system based on concrete setting, comprising:

[0006] Image acquisition module, which is used to acquire images of the interior of concrete during the concrete setting stage;

[0007] An image processing module, connected to the image acquisition module, is used to extract internal bubble images of the bubble aggregation region and internal crack images of the crack generation region;

[0008] A bubble analysis module, connected to the image processing module, is used to determine whether the distribution of bubbles inside the concrete is qualified based on the bubble characterization parameters of the internal bubble image. Under the condition that the bubble distribution is qualified, it determines whether the bubble escape trend is stable based on the bubble escape vector of several consecutive frames of internal bubble images and forms the bubble escape path.

[0009] A scanning cycle adjustment module, which is connected to the bubble analysis module, is used to reduce the preset scanning cycle by a first preset scanning cycle adjustment coefficient or a second preset scanning cycle adjustment coefficient based on the condition that the bubble escape trend is unstable.

[0010] The crack analysis module, which is connected to the image processing module, is used to determine whether the degree of internal crack formation in concrete is within a reasonable range based on the crack comprehensive index of the internal crack image. Under the condition that the degree of crack formation is within a reasonable range, it determines whether the crack propagation direction trend is stable based on the crack directionality coefficient of several consecutive frames of internal crack images, and determines the crack propagation direction.

[0011] The joint analysis module, which is connected to the bubble analysis module and the crack analysis module, is used to determine whether crack generation and bubble accumulation are related based on the overlap index between the bubble accumulation region and the crack generation region, and to determine whether bubble escape has a guiding effect on crack propagation based on the path angle between the bubble escape path and the crack propagation direction.

[0012] Furthermore, the bubble analysis module determines that the distribution of bubbles inside the concrete is qualified based on the comparison results of the bubble characterization parameters of the internal bubble image being less than or equal to the bubble characterization parameter threshold.

[0013] Furthermore, the bubble analysis module determines that the bubble escape trend inside the concrete is unstable based on the comparison results of the bubble escape vectors of several consecutive frames of internal bubble images being greater than the preset bubble escape vector.

[0014] Furthermore, the scanning cycle adjustment module determines to reduce the preset scanning cycle by a first preset scanning cycle adjustment coefficient based on the comparison result that the difference between the bubble escape vector and the preset bubble escape vector is less than or equal to the preset difference.

[0015] Furthermore, the scanning cycle adjustment module determines to reduce the preset scanning cycle by a second preset scanning cycle adjustment coefficient based on the comparison result of the difference between the bubble escape vector and the preset bubble escape vector being greater than the preset difference.

[0016] Furthermore, the crack analysis module determines that the degree of internal crack formation in the concrete is within a reasonable range based on the comparison results of the crack comprehensive index of the internal crack image being less than or equal to the preset crack comprehensive index.

[0017] Furthermore, the crack analysis module determines that the crack propagation direction trend is unstable based on the comparison results of crack direction coefficients in several consecutive frames of internal crack images being greater than preset crack direction coefficients.

[0018] Furthermore, the joint analysis module determines that crack generation and bubble aggregation are correlated based on the comparison results of the overlap index between the bubble aggregation region and the crack generation region being greater than a preset overlap index.

[0019] Furthermore, the joint analysis module determines that bubble escape has a guiding effect on crack propagation based on the comparison results of the path angle between the bubble escape path and the crack propagation direction being less than or equal to a path angle threshold.

[0020] Furthermore, the joint analysis module determines that bubble escape does not guide crack propagation based on the comparison results of the path angle between the bubble escape path and the crack propagation direction being greater than a path angle threshold.

[0021] Compared with the prior art, the beneficial effects of the present invention are that it integrates multiple modules such as image acquisition, image processing, bubble analysis, crack analysis, scanning cycle adjustment and joint analysis into a complete automated testing system. This system can efficiently complete a comprehensive evaluation of the concrete setting process, improve the efficiency and reliability of concrete setting tests, flexibly meet different testing needs, reduce human error, improve the repeatability and accuracy of test results, and thus improve the precision of concrete setting tests.

[0022] Furthermore, this invention acquires internal images of concrete during the setting stage to reflect the characteristics of air bubbles and cracks within the concrete. The image processing module performs noise reduction, contrast enhancement, and image segmentation on the acquired images, extracting internal air bubble images from areas of air bubble aggregation and internal crack images from areas of crack formation. This ensures image purity and feature prominence, providing a data foundation for subsequent analysis. Real-time monitoring of microstructural changes during concrete setting improves image clarity and feature recognition accuracy, while also reducing misjudgments caused by image quality issues. This provides more reliable data support for concrete setting tests, thereby improving the accuracy of concrete setting tests.

[0023] Furthermore, this invention evaluates the quality of the internal bubble distribution in concrete by using bubble characterization parameters from internal bubble images, and further analyzes whether the bubble escape trend is stable. By analyzing the bubble escape vector of multiple consecutive frames, the bubble escape path is formed to evaluate the dynamic behavior of the bubbles. The presence of bubbles has a significant impact on the freeze-thaw resistance and durability of concrete. Excessive bubbles will reduce the density and strength of concrete. Accurate analysis of bubble distribution and escape trend can promptly detect abnormalities in the bubble generation and escape process, thereby improving the performance of concrete.

[0024] Furthermore, this invention assesses whether the formation of internal cracks in concrete is within a reasonable range by using the crack comprehensive index of internal crack images, and further analyzes whether the trend of crack propagation direction is stable. By analyzing the crack directionality coefficient of continuous multi-frame images, the crack propagation direction is formed, the dynamic behavior of cracks is evaluated, the crack generation and propagation direction is analyzed, the potential risks of cracks are detected in a timely manner, the accuracy of concrete setting tests is improved, and the long-term stability of concrete structures is ensured.

[0025] Furthermore, by evaluating the correlation between the bubble accumulation area and the crack formation area, this invention analyzes whether crack formation is related to bubble accumulation and whether bubble escape guides crack propagation, comprehensively assessing the interaction between bubbles and cracks. This provides a more comprehensive perspective for the integrated assessment of the internal structure of concrete, improves the understanding of internal defects in concrete, and thus improves the accuracy of concrete setting tests. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the module connection of a concrete setting test system according to an embodiment of the present invention;

[0027] Figure 2 This is a flowchart for determining whether the distribution of air bubbles inside concrete is qualified according to an embodiment of the present invention;

[0028] Figure 3 A flowchart for determining whether the degree of internal crack formation in concrete is within a reasonable range, as described in this embodiment of the invention.

[0029] Figure 4 This is a flowchart illustrating whether crack generation and bubble aggregation are correlated in an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0031] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] It should be noted that the data in this embodiment are all derived from a comprehensive analysis and evaluation of historical test data and corresponding historical test results from the three months prior to this test. Those skilled in the art will understand that the determination of the above-mentioned parameters for any single item in this invention can be achieved by selecting the value with the highest percentage based on the data distribution as the preset standard parameter, using weighted summation to obtain the value as the preset standard parameter, substituting each historical data point into a specific formula and using the value obtained from that formula as the preset standard parameter, or other selection methods, as long as the invention can clearly define different specific situations in the single-item judgment process through the obtained values.

[0033] Please see Figure 1 The module connection diagram of the test system based on concrete setting is shown below:

[0034] This invention relates to a concrete setting testing system, comprising:

[0035] Image acquisition module, which is used to acquire images of the interior of concrete during the concrete setting stage;

[0036] An image processing module, connected to the image acquisition module, is used to extract internal bubble images of the bubble aggregation region and internal crack images of the crack generation region;

[0037] A bubble analysis module, connected to the image processing module, is used to determine whether the distribution of bubbles inside the concrete is qualified based on the bubble characterization parameters of the internal bubble image. Under the condition that the bubble distribution is qualified, it determines whether the bubble escape trend is stable based on the bubble escape vector of several consecutive frames of internal bubble images and forms the bubble escape path.

[0038] A scanning cycle adjustment module, which is connected to the bubble analysis module, is used to reduce the preset scanning cycle by a first preset scanning cycle adjustment coefficient or a second preset scanning cycle adjustment coefficient based on the condition that the bubble escape trend is unstable.

[0039] The crack analysis module, which is connected to the image processing module, is used to determine whether the degree of internal crack formation in concrete is within a reasonable range based on the crack comprehensive index of the internal crack image. Under the condition that the degree of crack formation is within a reasonable range, it determines whether the crack propagation direction trend is stable based on the crack directionality coefficient of several consecutive frames of internal crack images, and determines the crack propagation direction.

[0040] The joint analysis module, which is connected to the bubble analysis module and the crack analysis module, is used to determine whether crack generation and bubble accumulation are related based on the overlap index between the bubble accumulation region and the crack generation region, and to determine whether bubble escape has a guiding effect on crack propagation based on the path angle between the bubble escape path and the crack propagation direction.

[0041] In this embodiment of the invention, the setting stage is the process by which the concrete mixture goes from losing its plasticity to fully hardening.

[0042] In this embodiment of the invention, the internal image is a series of consecutive images obtained by scanning and imaging with equipment such as an industrial CT scanner capable of acquiring images of internal defects in concrete.

[0043] In this embodiment of the invention, the industrial CT scanner scans the concrete at a preset scanning cycle, which is once every 15 minutes.

[0044] Specifically, this invention integrates multiple modules such as image acquisition, image processing, bubble analysis, crack analysis, scanning cycle adjustment, and joint analysis into a complete automated testing system. This system can efficiently complete a comprehensive evaluation of the concrete setting process, improving the efficiency and reliability of concrete setting tests. It can flexibly respond to different testing needs, while reducing human error and improving the repeatability and accuracy of test results, thereby enhancing the precision of concrete setting tests.

[0045] Specifically, the image processing module first performs denoising on the internal image, then enhances the contrast of the denoised internal image, and then uses image segmentation technology to extract the bubble aggregation region and crack generation region in the internal image to obtain the internal bubble image and the internal crack image. The above image processing process is a conventional process and will not be described in detail here.

[0046] It is understood that the dimensions of the internal bubble image and the internal crack image are consistent with the dimensions of the internal image, ensuring an accurate correspondence between feature position and shape. Only bubble features are retained, while other non-bubble features have been removed, ensuring image purity and feature prominence. The bubble features are consistent with those in the internal crack image, and the processing of the internal crack image is also consistent with that of the internal bubble image. Furthermore, the bubble features in the internal bubble image and the crack features in the internal crack image should be located in the same spatial position. Since they highlight different features, in practical applications, these two images can be analyzed independently or overlaid for comparison to meet different analytical needs. In addition, during feature extraction, it is ensured that key attributes such as feature position, shape, and size are preserved in the feature image without introducing any deformation or positional shift.

[0047] In this embodiment of the invention, the denoising process employs either Gaussian filtering or median filtering, the contrast enhancement employs either histogram equalization or contrast stretching, and the image segmentation technique employs either threshold segmentation or edge detection.

[0048] Specifically, this invention acquires internal images of concrete during the setting stage to reflect the characteristics of air bubbles and cracks within the concrete. The image processing module performs noise reduction, contrast enhancement, and image segmentation on the acquired images, extracting internal air bubble images from areas of air bubble aggregation and internal crack images from areas of crack formation. This ensures image purity and feature prominence, providing a data foundation for subsequent analysis. It also monitors the microstructural changes during the concrete setting process in real time, improving image clarity and the accuracy of feature recognition. Furthermore, it reduces misjudgments caused by image quality issues, providing more reliable data support for concrete setting tests and thus improving the accuracy of concrete setting tests.

[0049] Specifically, after obtaining the internal bubble image, the bubble analysis module calculates the bubble distribution density and the area ratio of the clustered region in the internal bubble image to characterize the bubble generation during the concrete setting stage, setting:

[0050]

[0051] in, Indicates the bubble distribution density. This represents the average number of non-identical bubbles in the internal bubble image. The area of ​​the internal bubble image. This represents the average percentage of the area of ​​the clustered region. This represents the average area of ​​the bubble aggregation region.

[0052] Please see Figure 2 The flowchart for determining whether the distribution of air bubbles inside concrete is acceptable is shown below:

[0053] Specifically, the bubble analysis module determines whether the distribution of bubbles inside the concrete is qualified based on the comparison result between the bubble characterization parameters of the internal bubble image and the bubble characterization parameter threshold of 0.15.

[0054] If the bubble characterization parameter is less than or equal to the bubble characterization parameter threshold, then the bubble distribution inside the concrete is determined to be qualified.

[0055] If the bubble characterization parameter is greater than the bubble characterization parameter threshold, then the bubble distribution inside the concrete is determined to be unqualified.

[0056] In this embodiment of the invention, the threshold value of the bubble characterization parameter is 0.15, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0057] Specifically, the bubble analysis module calculates the bubble characterization parameters according to the following formula, and sets them as follows:

[0058]

[0059] in, This indicates that the bubble represents a parameter. Bubble distribution density, This represents the maximum bubble distribution density. This represents the minimum bubble distribution density. This represents the percentage of the area within the cluster. This represents the maximum percentage of the area that is clustered together. This represents the minimum percentage of the area that is clustered together.

[0060] Specifically, the bubble analysis module determines whether the bubble escape trend inside the concrete is stable based on the comparison between the bubble escape vector of several consecutive frames of internal bubble images and the preset bubble escape vector, provided that the bubble distribution inside the concrete is qualified.

[0061] If the bubble escape vector is less than or equal to the preset bubble escape vector, then the bubble escape trend inside the concrete is determined to be stable.

[0062] If the bubble escape vector is greater than the preset bubble escape vector, then the bubble escape trend inside the concrete is determined to be unstable.

[0063] In this embodiment of the invention, the preset bubble escape vector value is 0.89, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0064] In this embodiment of the invention, a stable trend of air bubbles escaping from the concrete means that the air bubbles escape at a relatively constant speed, while an unstable trend means that the air bubbles escape with sudden acceleration or deceleration.

[0065] Specifically, the bubble analysis module selects the frame with the most bubbles as the starting frame and the last frame of the scanned internal bubble image as the ending frame. It matches the position of each bubble in the consecutive frames, extracts its motion trajectory, and forms the bubble escape path.

[0066] Specifically, the bubble analysis module calculates the bubble escape vector according to the following formula, and sets it as follows:

[0067]

[0068] in, This represents the bubble escape vector. This refers to the number of bubbles that are identical in the start and end frames. For the first A bubble in velocity components in the direction, For the first A bubble in The velocity component in the direction.

[0069] Specifically, the scanning cycle adjustment module determines to adjust the preset scanning cycle based on the comparison result of the difference between the bubble escape vector and the preset bubble escape vector and the preset difference, under the condition that the trend of bubble escape inside the concrete is unstable.

[0070] If the difference is less than or equal to the preset difference, then the preset scan cycle is determined to be reduced by the first preset scan cycle adjustment coefficient of 0.96;

[0071] If the difference is greater than the preset difference, then the preset scan cycle is reduced by the second preset scan cycle adjustment coefficient of 0.87.

[0072] The difference is the difference between the bubble escape vector and the preset bubble escape vector, that is, the bubble escape vector minus the preset bubble escape vector.

[0073] In this embodiment of the invention, the preset difference value is 0.35, but the above value is not limited to this, and those skilled in the art can also adjust the value according to actual needs.

[0074] In this embodiment of the invention, the reduced preset scan period is the product of the preset scan period and the l-th preset scan period adjustment coefficient, where l takes the value of 1 or 2, Z1 is the first preset scan period adjustment coefficient of 0.96, and Z2 is the second preset scan period adjustment coefficient of 0.87.

[0075] Specifically, this invention assesses the quality of the internal bubble distribution in concrete by using bubble characterization parameters from internal bubble images, and further analyzes whether the bubble escape trend is stable. Through bubble escape vector analysis of multiple consecutive frames of images, the bubble escape path is formed to evaluate the dynamic behavior of the bubbles. The presence of bubbles has a significant impact on the freeze-thaw resistance and durability of concrete. Excessive bubbles will reduce the density and strength of concrete. Accurate analysis of bubble distribution and escape trend can promptly detect abnormalities in the bubble generation and escape process, thereby improving the performance of concrete.

[0076] Specifically, after obtaining the internal crack image, the crack analysis module extracts the crack skeleton using a skeletonization algorithm to characterize the crack formation during the concrete setting stage, thereby obtaining the crack length. The crack contour is extracted using an edge detection algorithm to obtain the crack width. The above processing procedure is a routine process and will not be described in detail here.

[0077] Please see Figure 3 The flowchart for determining whether the formation of internal cracks in concrete is within a reasonable range is shown below:

[0078] Specifically, the crack analysis module determines whether the degree of internal crack formation in the concrete is within a reasonable range based on the crack comprehensive index of the internal crack image and the preset crack comprehensive index of 0.12.

[0079] If the comprehensive crack index is less than or equal to the preset comprehensive crack index, then the degree of internal crack formation in the concrete is determined to be within a reasonable range.

[0080] If the comprehensive crack index is greater than the preset comprehensive crack index, it is determined that the degree of internal crack formation in the concrete is not within a reasonable range.

[0081] In this embodiment of the invention, the preset crack comprehensive index is 0.12, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0082] Specifically, the crack analysis module calculates the comprehensive crack index according to the following formula, and sets it as follows:

[0083]

[0084] in, Indicates the comprehensive crack index, The average crack length of the internal crack image. This represents the maximum crack length in the internal crack image. The minimum crack length in the internal crack image. The average crack length of the internal crack image. This represents the maximum crack length in the internal crack image. This is the minimum crack length in the internal crack image.

[0085] Specifically, the crack analysis module, under the condition that the degree of internal crack formation in the concrete is within a reasonable range, determines whether the crack propagation direction trend is stable based on the comparison result of the crack direction coefficient of several consecutive frames of internal crack images with the preset crack direction coefficient:

[0086] If the crack directionality coefficient is less than or equal to the preset crack directionality coefficient, then the crack propagation direction trend is determined to be stable.

[0087] If the crack directionality coefficient is greater than the preset crack directionality coefficient, then the crack propagation direction trend is determined to be unstable.

[0088] In this embodiment of the invention, the preset crack directionality coefficient is 0.21, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0089] Understandably, a stable crack propagation direction trend indicates that the crack propagates along a relatively fixed direction without showing a sudden tendency to change direction; an unstable crack propagation direction trend indicates that the crack propagates along multiple directions or frequently changes its propagation direction.

[0090] Specifically, the crack analysis module selects the frame with the most cracks as the start frame and the last frame of internal cracks scanned as the end frame. It matches the position of each crack in consecutive frames, extracts its expansion trajectory, and determines the direction of crack expansion.

[0091] Specifically, the crack analysis module calculates the crack directionality coefficient according to the following formula, and sets it as follows:

[0092]

[0093] in, Indicates the crack directionality coefficient. Number of consecutive frames For the first The direction angle of crack propagation in the frame image. For the first The direction angle of crack propagation in the frame image.

[0094] Specifically, this invention assesses whether the formation of internal cracks in concrete is within a reasonable range by using the comprehensive crack index of internal crack images, and further analyzes whether the trend of crack propagation direction is stable. By analyzing the crack directionality coefficient of continuous multi-frame images, the crack propagation direction is formed, the dynamic behavior of cracks is evaluated, the crack generation and propagation direction is analyzed, the potential risks of cracks are detected in a timely manner, the accuracy of concrete setting tests is improved, and the long-term stability of concrete structures is ensured.

[0095] Please see Figure 4 The flowchart for determining whether there is a correlation between crack formation and bubble aggregation is shown below:

[0096] Specifically, the joint analysis module determines whether there is a correlation between crack generation and bubble aggregation based on the comparison result of the overlap index between the bubble aggregation region and the crack generation region and the preset overlap index.

[0097] If the overlap index is less than or equal to the preset overlap index, then it is determined that crack generation and bubble aggregation are not related.

[0098] If the overlap index is greater than the preset overlap index, then it is determined that crack generation and bubble aggregation are related.

[0099] In this embodiment of the invention, the preset overlap index is 0.55, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0100] Specifically, the joint analysis module calculates the overlap index according to the following formula, and sets it as follows:

[0101]

[0102] in, Indicates the overlap index. This represents the overlapping area of ​​the bubble aggregation region and the crack generation region in all frames. The total area of ​​the bubble cluster region across all frames. This represents the total area of ​​the crack-generating region across all frames.

[0103] Specifically, the joint analysis module, after determining that crack formation and bubble aggregation are correlated, determines whether bubble escape has a guiding effect on crack propagation based on the comparison between the path angle between the bubble escape path and the crack propagation direction and a path angle threshold.

[0104] If the path angle is less than or equal to the path angle threshold, then it is determined that the bubble escape has a guiding effect on crack propagation;

[0105] If the path angle is greater than the path angle threshold, it is determined that the bubble escape does not guide the crack propagation.

[0106] In this embodiment of the invention, the path angle threshold is 25°, but the above value is not limited to this, and those skilled in the art can adjust the value according to actual needs.

[0107] Specifically, the joint analysis module calculates the path angle according to the following formula, and sets it as follows:

[0108]

[0109] in, Indicates the angle between the paths. Let be the unit vector of the bubble's escape path. Let be the unit vector in the direction of crack propagation. Let the unit vector of the bubble escape path be the magnitude. Let be the unit vector magnitude in the direction of crack propagation.

[0110] Specifically, this invention assesses the correlation between bubble accumulation areas and crack formation areas, analyzes whether crack formation is related to bubble accumulation, and analyzes whether bubble escape guides crack propagation. It comprehensively evaluates the interaction between bubbles and cracks, providing a more comprehensive perspective for the integrated assessment of the internal structure of concrete, improving the understanding of internal defects in concrete, and thus improving the accuracy of concrete setting tests.

[0111] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0112] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A testing system based on concrete setting, characterized in that, include: Image acquisition module, which is used to acquire images of the interior of concrete during the concrete setting stage; An image processing module, connected to the image acquisition module, is used to extract internal bubble images of the bubble aggregation region and internal crack images of the crack generation region; A bubble analysis module, connected to the image processing module, is used to determine whether the distribution of bubbles inside the concrete is qualified based on the bubble characterization parameters of the internal bubble image. Under the condition that the bubble distribution is qualified, it determines whether the bubble escape trend is stable based on the bubble escape vector of several consecutive frames of internal bubble images and forms the bubble escape path. A scanning cycle adjustment module, which is connected to the bubble analysis module, is used to reduce the preset scanning cycle by a first preset scanning cycle adjustment coefficient or a second preset scanning cycle adjustment coefficient based on the condition that the bubble escape trend is unstable. The crack analysis module, which is connected to the image processing module, is used to determine whether the degree of internal crack formation in concrete is within a reasonable range based on the crack comprehensive index of the internal crack image. Under the condition that the degree of crack formation is within a reasonable range, it determines whether the crack propagation direction trend is stable based on the crack directionality coefficient of several consecutive frames of internal crack images, and determines the crack propagation direction. The joint analysis module, which is connected to the bubble analysis module and the crack analysis module, is used to determine whether crack generation and bubble accumulation are related based on the overlap index between the bubble accumulation region and the crack generation region, and to determine whether bubble escape has a guiding effect on crack propagation based on the path angle between the bubble escape path and the crack propagation direction.

2. The testing system based on concrete setting according to claim 1, characterized in that, The bubble analysis module determines that the distribution of bubbles inside the concrete is qualified based on the comparison results of the bubble characterization parameters of the internal bubble image being less than or equal to the bubble characterization parameter threshold.

3. The testing system based on concrete setting according to claim 2, characterized in that, The bubble analysis module determines that the bubble escape trend inside the concrete is unstable based on the comparison results of the bubble escape vector of several consecutive frames of internal bubble images being greater than the preset bubble escape vector.

4. The testing system based on concrete setting according to claim 3, characterized in that, The scanning cycle adjustment module determines to reduce the preset scanning cycle by a first preset scanning cycle adjustment coefficient based on the comparison result that the difference between the bubble escape vector and the preset bubble escape vector is less than or equal to the preset difference.

5. The concrete setting-based testing system according to claim 3, characterized in that, The scanning cycle adjustment module determines to reduce the preset scanning cycle by a second preset scanning cycle adjustment coefficient based on the comparison result that the difference between the bubble escape vector and the preset bubble escape vector is greater than the preset difference.

6. The testing system based on concrete setting according to claim 1, characterized in that, The crack analysis module determines that the degree of internal crack formation in the concrete is within a reasonable range based on the comparison result of the crack comprehensive index of the internal crack image being less than or equal to the preset crack comprehensive index.

7. The testing system based on concrete setting according to claim 6, characterized in that, The crack analysis module determines that the crack propagation direction trend is unstable based on the comparison results of crack direction coefficients in several consecutive frames of internal crack images that are greater than preset crack direction coefficients.

8. The testing system based on concrete setting according to claim 1, characterized in that, The joint analysis module determines that crack generation and bubble aggregation are correlated based on the comparison result that the overlap index between the bubble aggregation region and the crack generation region is greater than a preset overlap index.

9. The testing system based on concrete setting according to claim 8, characterized in that, The joint analysis module determines that bubble escape has a guiding effect on crack propagation based on the comparison results of the path angle between the bubble escape path and the crack propagation direction being less than or equal to a path angle threshold.

10. The testing system based on concrete setting according to claim 8, characterized in that, The joint analysis module determines that bubble escape does not guide crack propagation based on the comparison results of the path angle between the bubble escape path and the crack propagation direction being greater than a path angle threshold.

Images