Concrete defect detection system and method

Abstract

The invention discloses a concrete defect detection system and method, relates to the technical field of defect detection, and establishes a foundation for subsequent secondary defect detection by performing preliminary screening and primary defect detection on concrete buildings in a target area to obtain each target building and a detection sequence of each target building. Analyzing each target building to obtain each concrete building influenced by the secondary defect, and analyzing the secondary defect characteristic value of each concrete building influenced by the secondary defect to determine the maintenance grade of each concrete building influenced by the secondary defect; the possibility that the internal damage degree of the concrete is accelerated and safety accidents are aggravated due to mutual influence of the secondary defect and the primary defect is avoided, and a targeted maintenance scheme is formulated according to the maintenance level to maintain the concrete, so that resource waste caused by excessive maintenance is avoided while the maintenance effect is ensured; and the completeness and rationality of the system are improved to a great extent.

Description

Technical Field

[0001] The present application relates to the technical field of defect detection, and in particular to a concrete defect detection system and method. Background Art

[0002] Structural defects in concrete can weaken its bearing capacity and affect the stability of the building structure. In severe cases, they may lead to accidents, thereby threatening the lives and property of users. At this time, it is particularly important to detect defects in concrete. Therefore, this application proposes a concrete defect detection system and method.

[0003] Prior art, such as the invention application patent with announcement number: CN118150692A, discloses a concrete defect detection method and system, which includes dividing the concrete surface into several areas, performing ultrasonic testing on each area, calculating the ultrasonic signal stability characterization value, dividing the signal feedback category, and selecting a detection method for concrete defects based on the signal feedback category, including tapping the concrete surface to obtain an audio signal, and judging whether the concrete has defects based on the audio signal, or performing a hardness test on each area of ​​the concrete surface, calculating the image similarity of each area in the concrete surface image before and after the hardness test, tapping each area of ​​the concrete surface to obtain a vibration signal, calculating the defect intensity characterization value, and identifying the defective area. The present invention improves the reliability of concrete detection by dividing the signal feedback category and adopting different methods for concrete defect detection.

[0004] The above solution has the following technical problems: 1. The current technology mainly obtains audio signals by knocking on the concrete surface, and judges whether there are defects in the concrete based on the audio signals. It does not take into account the deep-seated causes of concrete defects. The growth of plant roots and the presence of pests will interact with the defects of the concrete and may even aggravate the degree and speed of defects in the concrete. Ignoring this aspect will lead to a lack of accuracy in the defect detection results and will not provide a basis for subsequent maintenance and reinforcement of the concrete.

[0005] 2. Current technology lacks analysis of maintenance plans for concrete defects. The lack of analysis of the causes of concrete defects makes it impossible to analyze maintenance plans for concrete, which in turn makes it impossible to carry out maintenance work on related concrete. The current lack of this level will lead to the failure to repair concrete damage in a timely manner, which will lead to safety accidents and even threaten the safety of life and property. Summary of the Invention

[0006] The purpose of this application is to provide a concrete defect detection system and method to solve the problems existing in the background technology.

[0007] In order to solve the above technical problems, the present application adopts the following technical solutions: In the first aspect, the present application provides a concrete defect detection system, including: a detection sequence analysis module: used to analyze each concrete building in the target area, and then obtain the detection sequence of each target building.

[0008] Detection and analysis module: used to obtain the secondary defects of each level of inspection buildings based on the images of each level of inspection buildings, and then classify the inspection buildings at each level to obtain the secondary defect feature values ​​of each concrete building affected by the secondary defects, and determine the maintenance level of each concrete building affected by the secondary defects.

[0009] Maintenance plan analysis module: used to formulate maintenance plans based on the maintenance level of each concrete building affected by secondary defects and determine whether the maintenance plan is effective.

[0010] Preferably, the detection sequence analysis module includes: a target building acquisition unit: configured to screen concrete buildings in a target area and thereby acquire target buildings.

[0011] Target building analysis unit: used to analyze and obtain the primary defect assessment coefficient of each target building, and then obtain the inspection order of each target building.

[0012] Preferably, all concrete buildings in the target area are screened to obtain each target concrete building. The specific process is as follows: S1. Environmental information of each concrete building in the target area is obtained from a data center, and environmental keywords of each concrete building are extracted based on the environmental information of each concrete building in the target area.

[0013] S2. Obtain environmental keywords suitable for plant growth and synonyms of the environmental keywords from the data center, record them as environmental keywords required for plant root growth, match the environmental keywords of a concrete building in the target area with the environmental keywords required for plant root growth, and if the match is successful, record the concrete building in the target area as a target building; otherwise, record the concrete building in the target area as a non-target building, and obtain the target buildings accordingly.

[0014] S3. Obtain environmental keywords and synonyms of each environmental keyword related to insect pest occurrence from the data center, record them as environmental keywords related to insect pest occurrence, match the environmental keywords of a concrete building in the target area with the environmental keywords related to insect pest occurrence, and if the match is successful, record the concrete building in the target area as a target building; otherwise, record the concrete building in the target area as a non-target building, and obtain the target buildings accordingly.

[0015] S4. Combining the above steps, obtain each target building.

[0016] Preferably, the classification of the detected buildings at each level to obtain the concrete buildings affected by the secondary defects is carried out as follows: based on the secondary defects of the detected buildings at each level, it is obtained whether there are plant roots or insect pests in the detected buildings at each level; when a building in a certain level of detected buildings has plant roots, the building in the detected buildings at that level is recorded as a concrete building affected by plant roots; when a building in a certain level of detected buildings has insect pests, the building in the detected buildings at that level is recorded as a concrete building affected by insect pests; when a building in a certain level of detected buildings has no plant roots and insect pests, the building in the detected buildings at that level is recorded as a concrete building with primary defects, thereby obtaining the concrete buildings affected by plant roots, the concrete buildings affected by insect pests and the concrete buildings with primary defects.

[0017] Preferably, the maintenance plan is formulated according to the maintenance level of each concrete building affected by the secondary defects, and the specific process is as follows: for each first-level maintenance concrete building among the concrete buildings affected by plant roots, the concrete area in each building is demolished and re-poured.

[0018] For each secondary maintenance concrete building among the concrete buildings affected by plant roots, it is necessary to use physical methods or chemical agents to remove the plant roots in the concrete area, and then repair and reinforce it after the removal is completed.

[0019] For each first-level maintenance concrete building among the concrete buildings affected by insect infestation, the concrete areas in each building were demolished and re-poured.

[0020] For each first-level maintenance concrete building among the concrete buildings affected by insect pests, the agent is injected into the concrete or sprayed on the concrete surface to eliminate the pests, and the concrete is repaired and reinforced after the pests are eliminated.

[0021] For each primary defective concrete building, gaps and holes are filled with patching materials and the outer surface is reinforced.

[0022] Preferably, the specific process of determining whether the maintenance plan is effective is as follows: after the maintenance of each concrete building affected by the secondary defects is completed, each concrete building affected by the secondary defects is subjected to a secondary inspection after a preset period, and characteristic values ​​of each concrete building affected by the secondary defects are obtained by analysis, and characteristic values ​​of each plant root influence and each insect pest influence are obtained, which are compared with the characteristic values ​​of each plant root influence and each insect pest influence of the corresponding concrete building affected by the secondary defects before maintenance, and each concrete building affected by the secondary defects whose characteristic values ​​of plant root influence and insect pest influence are less than the characteristic values ​​of plant root influence and insect pest influence before maintenance are obtained, and recorded as each effective maintenance building, and each concrete building affected by the secondary defects whose characteristic values ​​of plant root influence and insect pest influence are greater than or equal to the characteristic values ​​of plant root influence and insect pest influence before maintenance are obtained, and recorded as each invalid maintenance building, and the number of effective maintenance buildings is compared with the number of invalid maintenance buildings. When the number of effective maintenance buildings is greater than the number of invalid maintenance areas, it indicates that the maintenance plan is effective, otherwise it indicates that the maintenance plan is invalid.

[0023] In a second aspect, the present application provides a concrete defect detection method, including: Step 1, detection sequence analysis: used to analyze each concrete building in the target area, and then obtain the detection sequence of each target building.

[0024] Step 2: Detection and analysis: This is used to obtain secondary defects of each level of inspection building based on the images of the inspection buildings at each level, and then classify the inspection buildings at each level to obtain the secondary defect feature values ​​of each concrete building affected by the secondary defects, and determine the maintenance level of each concrete building affected by the secondary defects.

[0025] Step 3: Maintenance plan analysis: This is used to formulate a maintenance plan based on the maintenance level of each concrete building affected by secondary defects and to determine whether the maintenance plan is effective.

[0026] The beneficial effects of the present application are: 1. A concrete defect detection system and method provided by the present application obtains each target building and the detection order of each target building by preliminary screening and primary defect detection of concrete buildings in the target area, laying the foundation for subsequent secondary defect detection, and then analyzing each target building to obtain each concrete building affected by secondary defects, and analyzing the secondary defect characteristic values ​​of each concrete building affected by secondary defects to determine the maintenance level of each concrete building affected by secondary defects. The mutual influence between secondary defects and primary defects will cause the degree of internal damage of concrete to accelerate and thus increase the possibility of safety accidents. Targeted maintenance plans are formulated according to the maintenance level to maintain it, which ensures the maintenance effect while avoiding the waste of resources caused by excessive maintenance, and greatly improves the perfection and rationality of the system.

[0027] 2. This application lays the foundation for subsequent defect detection by conducting preliminary screening of each concrete building in the target area, and avoids the waste of resources caused by blind detection. The primary defect detection is then carried out on each target concrete building after screening. The detection order of the secondary detection is determined according to the detection results of the primary defect detection, thereby ensuring the rationality and continuity of the detection method.

[0028] 3. This application conducts secondary defect detection on each concrete building according to the detection order of secondary detection, and then obtains each building affected by plant roots and each building affected by insect pests. The presence of plant roots and insect pests will accelerate the damage rate of the internal structure of concrete. The defect detection and priority maintenance of this level of concrete avoids the problem of increased possibility of safety accidents caused by rapid damage to the internal structure of concrete buildings, thereby avoiding further property and life losses. At the same time, it also ensures the meticulousness of the defect detection system and provides effective data support for the subsequent repair of defective concrete.

[0029] 4. This application determines the maintenance plan for each concrete building affected by secondary defects through the inspection results of each concrete building affected by secondary defects, formulates different maintenance plans according to the degree of defects, and provides technical support for subsequent specific maintenance measures, thereby ensuring the maintenance effect while avoiding the waste of resources caused by excessive maintenance. At the same time, it can improve the durability of concrete buildings and extend their service life. Finally, after the maintenance is completed, it analyzes whether the maintenance plan is effective, ensuring the completeness and rationality of the defect detection system and method. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the system structure connection for this application.

[0032] Figure 2 This is a flowchart of the steps for implementing the application method. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] Reference Figure 1 As shown, the present application provides a concrete defect detection system in a first aspect, comprising the following modules: a detection sequence analysis module: used to analyze each concrete building in a target area, and then obtain a detection sequence for each target building.

[0035] It should be noted that the scope of the target area is set by the relevant staff. It can be a city or a factory. There is no specific restriction here.

[0036] It should be noted that concrete buildings include all buildings made of poured concrete, including foundations, roads, bridges and dams.

[0037] In a specific example, the detection sequence analysis module includes: a target building acquisition unit: configured to screen concrete buildings in a target area and then acquire target buildings.

[0038] Target building analysis unit: used to analyze and obtain the primary defect assessment coefficient of each target building, and then obtain the inspection order of each target building.

[0039] In a specific example, all concrete buildings in the target area are screened to obtain each target concrete building. The specific process is as follows: S1. The environmental information of each concrete building in the target area is obtained from the data center, and the environmental keywords of each concrete building are extracted based on the environmental information of each concrete building in the target area.

[0040] S2. Obtain environmental keywords suitable for plant growth and synonyms of the environmental keywords from the data center, record them as environmental keywords required for plant root growth, match the environmental keywords of a concrete building in the target area with the environmental keywords required for plant root growth, and if the match is successful, record the concrete building in the target area as a target building; otherwise, record the concrete building in the target area as a non-target building, and obtain the target buildings accordingly.

[0041] S3. Obtain environmental keywords and synonyms of each environmental keyword related to insect pest occurrence from the data center, record them as environmental keywords related to insect pest occurrence, match the environmental keywords of a concrete building in the target area with the environmental keywords related to insect pest occurrence, and if the match is successful, record the concrete building in the target area as a target building; otherwise, record the concrete building in the target area as a non-target building, and obtain the target buildings accordingly.

[0042] S4. Combining the above steps, obtain each target building.

[0043] It should be noted that primary defects are holes and gaps inside and on the surface of concrete that are suitable for plant root growth or insect pests.

[0044] In a specific example, the analysis obtains the primary defect assessment coefficient of each target building, and the specific process is as follows: constructing the internal image of each target building based on the ultrasonic imaging technology, and obtaining the defect number and defect area of ​​the primary defects inside each target building based on the internal image of each target building, and recording them as L i and S i , where i represents the number of each target building, i=1,2...I, I is any integer greater than 2, according to the calculation formula:

[0045] The primary defect assessment coefficient χ of the i-th target building is obtained by analysis i , where L′ and S′ represent the defect quantity threshold and defect area threshold of primary defects in the building, respectively.

[0046] It should be noted that the defect area is the total defect area.

[0047] It should be noted that using ultrasound technology to construct an internal image of an object is a widely used existing technical method, so it will not be described in detail.

[0048] It should be noted that the defect number threshold for primary defects in buildings is set by relevant staff. For example, the defect number of primary defects of each target building is normally distributed and the median value is taken, and the median value is recorded as the defect number threshold. The method for setting the defect area is the same as the defect number threshold, so it will not be repeated here.

[0049] In a specific example, the analysis obtains the inspection buildings at each level, and then obtains the inspection order of the inspection buildings at each level. The specific process is as follows: when the primary defect assessment coefficient χ of a target building i =1, the target building is recorded as a first-level priority detection building.

[0050] When the primary defect assessment coefficient χ of a target building i =0, the target building is recorded as a secondary priority detection building.

[0051] When the primary defect assessment coefficient χ of a target building i =-1, the target building is recorded as a third-level priority detection building.

[0052] Based on this, the first-level priority inspection buildings, the second-level priority inspection buildings and the third-level priority inspection buildings are obtained.

[0053] Randomly obtain a certain level of priority detection area for detection. After the detection is completed, obtain the first-level priority detection area closest to the first-level priority detection area for detection. Repeat the above steps until the detection of all first-level priority detection areas is completed. Similarly, after the detection of each first-level priority detection area is completed, each second-level detection building is detected. For each third-level priority detection building, no detection is required.

[0054] Building inspection module: used to obtain the secondary defects of each level of inspection buildings based on the images of the inspection buildings at each level, and then classify the inspection buildings at each level to obtain the concrete buildings affected by the secondary defects, so as to analyze and obtain the secondary defect characteristic values ​​of each concrete building affected by the secondary defects, and determine the maintenance level of each concrete building affected by the secondary defects.

[0055] It should be noted that images are divided into internal images and external images.

[0056] It should be noted that secondary defects include plant roots and insect pests, so being affected by secondary defects includes being affected by plant roots and being affected by insect pests, and secondary defect characteristic values ​​include characteristic values ​​affected by plant roots and characteristic values ​​affected by insect pests.

[0057] In a specific example, the classification of the inspection buildings at each level to obtain the concrete buildings affected by secondary defects is as follows: based on the secondary defects of the inspection buildings at each level, it is obtained whether there are plant roots or insect pests in the inspection buildings at each level. When a building in a certain level of inspection buildings has plant roots, the building in the inspection buildings at that level is recorded as a concrete building affected by plant roots; when a building in a certain level of inspection buildings has insect pests, the building in the inspection buildings at that level is recorded as a concrete building affected by insect pests; when a building in a certain level of inspection buildings has no plant roots and insect pests, the building in the inspection buildings at that level is recorded as a primary defective concrete building, thereby obtaining the concrete buildings affected by plant roots, the concrete buildings affected by insect pests and the primary defective concrete buildings.

[0058] It should be noted that when a building in a certain level of inspection has both plant roots and insect pests, then the building in that level of inspection is both a concrete building affected by plant roots and a concrete building affected by insect pests.

[0059] In a specific example, the analysis obtains the secondary defect characteristic value of each concrete building affected by the secondary defect and determines the maintenance level of each concrete building affected by the secondary defect. The specific process is as follows: the type and number of each plant root are obtained from each image of each concrete building affected by the plant root through image recognition technology, and recorded as Q mj , m represents the number of each concrete building affected by plant roots, m = 1, 2 ... M, M is an arbitrary integer greater than 2, j represents the type number of each plant root, j = 1, 2 ... J, J is an arbitrary integer greater than 2, according to the calculation formula: The analysis results show that the characteristic value α of the mth concrete building affected by plant roots is affected by plant roots. m , where S m is the area of ​​the mth concrete building affected by plant roots, J is the total number of plant root types, and similarly, the pest-affected characteristic values ​​of each concrete building affected by insect pests can be obtained by analysis.

[0060] Substitute the plant root-affected characteristic values ​​of each concrete building affected by plant roots into the maintenance level evaluation model, and use the maintenance level evaluation expression: Output the maintenance level σ of the mth concrete building affected by plant roots m , where α′ is the threshold of the characteristic value affected by plant roots. Similarly, the maintenance level of each concrete building affected by insect pests can be analyzed and obtained.

[0061] It should be noted that the threshold value of the characteristic value affected by plant roots is set by the relevant staff. For example, the average value of the characteristic value affected by plant roots of each concrete building affected by plant roots is used as the threshold value of the characteristic value affected by plant roots. No specific restrictions are made here.

[0062] Maintenance plan analysis module: used to formulate maintenance plans based on the maintenance level of each concrete building affected by secondary defects and determine whether the maintenance plan is effective.

[0063] In a specific example, the maintenance plan is formulated according to the maintenance level of each concrete building affected by the secondary defects. The specific process is as follows: for each first-level maintenance concrete building among the concrete buildings affected by plant roots, the concrete area in each building is demolished and re-poured.

[0064] For each secondary maintenance concrete building among the concrete buildings affected by plant roots, it is necessary to use physical methods or chemical agents to remove the plant roots in the concrete area, and then repair and reinforce it after the removal is completed.

[0065] For each first-level maintenance concrete building among the concrete buildings affected by insect infestation, the concrete areas in each building were demolished and re-poured.

[0066] For each first-level maintenance concrete building among the concrete buildings affected by insect pests, the agent is injected into the concrete or sprayed on the concrete surface to eliminate the pests, and the concrete is repaired and reinforced after the pests are eliminated.

[0067] For each primary defective concrete building, gaps and holes are filled with patching materials and the outer surface is reinforced.

[0068] It should be noted that for each first-level maintenance concrete building, protective measures should be taken on the concrete surface after re-pouring, such as applying anti-penetration materials to prevent plant seeds from entering the concrete, and adding insect repellents during the concrete pouring process.

[0069] It should be noted that the repair materials include cement mortar and epoxy resin putty.

[0070] In a specific example, the specific process of determining whether the maintenance plan is effective is as follows: after the maintenance of each concrete building affected by the secondary defects is completed, each concrete building affected by the secondary defects is subjected to a secondary inspection after a preset period, and the characteristic values ​​of each concrete building affected by the secondary defects are analyzed to obtain the characteristic values ​​of each plant root system and each insect pest system, and compare them with the characteristic values ​​of each plant root system and each insect pest system before the maintenance of the corresponding concrete building affected by the secondary defects. The concrete buildings affected by the secondary defects whose characteristic values ​​of each plant root system and each insect pest system are less than the characteristic values ​​of each plant root system and each insect pest system before the maintenance are obtained, and recorded as effective maintenance buildings. The concrete buildings affected by the secondary defects whose characteristic values ​​of each plant root system and each insect pest system are greater than or equal to the characteristic values ​​of each plant root system and each insect pest system before the maintenance are obtained, and recorded as ineffective maintenance buildings. The number of effective maintenance buildings is compared with the number of ineffective maintenance buildings. When the number of effective maintenance buildings is greater than the number of ineffective maintenance areas, it indicates that the maintenance plan is effective. Otherwise, it indicates that the maintenance plan is invalid.

[0071] It should be noted that the length of the preset cycle is determined by the relevant staff, such as half a month, one month, etc., and there is no specific restriction here.

[0072] Reference Figure 2 As shown, the present application provides a concrete defect detection method in a second aspect, comprising the following steps: Step 1, detection sequence analysis: used to analyze each concrete building in the target area, and then obtain the detection sequence of each target building.

[0073] Step 2: Detection and analysis: This is used to obtain secondary defects of each level of inspection building based on the images of the inspection buildings at each level, and then classify the inspection buildings at each level to obtain the secondary defect feature values ​​of each concrete building affected by the secondary defects, and determine the maintenance level of each concrete building affected by the secondary defects.

[0074] Step 3: Maintenance plan analysis: This is used to formulate a maintenance plan based on the maintenance level of each concrete building affected by secondary defects and to determine whether the maintenance plan is effective.

[0075] The present application provides a concrete defect detection system and method, which obtains each target building and the detection order of each target building by performing preliminary screening and primary defect detection on concrete buildings in a target area, laying the foundation for subsequent secondary defect detection. Then, each target building is analyzed to obtain each concrete building affected by secondary defects, and the secondary defect characteristic values ​​of each concrete building affected by secondary defects are analyzed to determine the maintenance level of each concrete building affected by secondary defects. The mutual influence between secondary defects and primary defects will cause the degree of internal damage of concrete to accelerate and thus increase the possibility of safety accidents. Targeted maintenance plans are formulated according to the maintenance level to maintain the concrete, ensuring the maintenance effect while avoiding the waste of resources caused by excessive maintenance, thereby greatly improving the perfection and rationality of the system.

[0076] The above content is merely an example and explanation of the concept of the present application. Technicians in this technical field may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this application, they should all fall within the scope of protection of this application.

Claims

1. A concrete defect detection system, characterized in that: include: Detection sequence analysis module: used to analyze each concrete building in the target area and obtain the detection sequence of each target building; Detection and analysis module: used to obtain secondary defects of each level of inspection buildings based on images of each level of inspection buildings, and then classify the inspection buildings at each level to obtain the secondary defect feature values ​​of each concrete building affected by the secondary defects, and determine the maintenance level of each concrete building affected by the secondary defects; Maintenance plan analysis module: used to formulate maintenance plans based on the maintenance level of each concrete building affected by secondary defects and determine whether the maintenance plan is effective.

2. A concrete defect detection system according to claim 1, characterized in that: The detection sequence analysis module includes: Target building acquisition unit: used to screen various concrete buildings in the target area and then acquire each target building; Target building analysis unit: used to analyze and obtain the primary defect assessment coefficient of each target building, and then obtain the inspection order of each target building.

3. A concrete defect detection system according to claim 2, characterized in that: The specific process of screening all concrete buildings in the target area and obtaining each target concrete building is as follows: S1. Obtaining environmental information of each concrete building in the target area from the data center, and extracting environmental keywords of each concrete building based on the environmental information of each concrete building in the target area; S2. Obtaining environmental keywords suitable for plant growth and synonyms of each environmental keyword from the data center, recording them as environmental keywords required for plant root growth, and matching the environmental keywords of a concrete building in the target area with the environmental keywords required for plant root growth. If a match is successful, the concrete building in the target area is recorded as a target building; otherwise, the concrete building in the target area is recorded as a non-target building, and target buildings are obtained accordingly; S3. Obtaining environmental keywords related to pest occurrence and synonyms of each environmental keyword from the data center, recording them as environmental keywords related to pest occurrence, and matching the environmental keywords of a concrete building in the target area with the environmental keywords related to pest occurrence. If a match is successful, the concrete building in the target area is recorded as a target building; otherwise, the concrete building in the target area is recorded as a non-target building, and target buildings are obtained accordingly. S4. Combining the above steps, obtain each target building.

4. A concrete defect detection system according to claim 2, characterized in that: The analysis results in the primary defect assessment coefficient of each target building. The specific process is as follows: Based on the ultrasonic imaging technology, the internal image of each target building is constructed, and the defect number and defect area of ​​the primary defects inside each target building are obtained based on the internal image of each target building, and are recorded as L i and S i , where i represents the number of each target building, i=1,2...I, I is any integer greater than 2, according to the calculation formula: The primary defect assessment coefficient χ of the i-th target building is obtained by analysis i , where L′ and S′ represent the defect quantity threshold and defect area threshold of primary defects in the building, respectively.

5. A concrete defect detection system according to claim 4, characterized in that: The analysis obtains the inspection buildings at each level, and then obtains the inspection order of the inspection buildings at each level. The specific process is as follows: When the primary defect assessment coefficient χ of a target building i =1, the target building is recorded as a first-level priority detection building; When the primary defect assessment coefficient χ of a target building i =0, the target building is recorded as a secondary priority detection building; When the primary defect assessment coefficient χ of a target building i = -1, the target building is marked as a level 3 priority detection building; Based on this, we can obtain the first-level priority inspection buildings, the second-level priority inspection buildings and the third-level priority inspection buildings; Randomly obtain a certain level of priority detection area for detection. After the detection is completed, obtain the first-level priority detection area closest to the first-level priority detection area for detection. Repeat the above steps until the detection of all first-level priority detection areas is completed. Similarly, after the detection of each first-level priority detection area is completed, each second-level detection building is detected. For each third-level priority detection building, no detection is required.

6. A concrete defect detection system according to claim 5, characterized in that: The concrete buildings affected by secondary defects are classified into different levels. The specific process is as follows: Based on the secondary defects of the inspected buildings at each level, it is obtained whether there are plant roots or insect pests in the inspected buildings at each level. When a building in a certain level of inspected buildings has plant roots, the building in the inspected buildings at that level is recorded as a concrete building affected by plant roots; when a building in a certain level of inspected buildings has insect pests, the building in the inspected buildings at that level is recorded as a concrete building affected by insect pests; when a building in a certain level of inspected buildings has no plant roots and insect pests, the building in the inspected buildings at that level is recorded as a primary defective concrete building. Based on this, the concrete buildings affected by plant roots, the concrete buildings affected by insect pests and the primary defective concrete buildings are obtained.

7. A concrete defect detection system according to claim 6, characterized in that: The analysis obtains the secondary defect characteristic value of each concrete building affected by the secondary defect and determines the maintenance level of each concrete building affected by the secondary defect. The specific process is as follows: The type and quantity of each plant root are obtained from each image of the concrete building affected by the plant root through image recognition technology, and recorded as Q mj , m represents the number of each concrete building affected by plant roots, m = 1, 2 ... M, M is an arbitrary integer greater than 2, j represents the type number of each plant root, j = 1, 2 ... J, J is an arbitrary integer greater than 2, according to the calculation formula: Analyze and obtain the characteristic value of the plant root system of the mth concrete building affected by the plant root system α m, where S m is the area of ​​the mth concrete building affected by plant roots, J is the total number of plant root species, and similarly, the pest-affected characteristic values ​​of each concrete building affected by pests can be obtained by analysis; Substitute the plant root-affected characteristic values ​​of each concrete building affected by plant roots into the maintenance level evaluation model, and use the maintenance level evaluation expression: Output the maintenance level σ of the mth concrete building affected by plant roots m , where α′ is the threshold of the characteristic value affected by plant roots. Similarly, the maintenance level of each concrete building affected by insect pests can be analyzed and obtained.

8. A concrete defect detection system according to claim 7, characterized in that: The maintenance plan is formulated according to the maintenance level of each concrete building affected by secondary defects. The specific process is as follows: For each first-level maintenance concrete building among the concrete buildings affected by plant roots, the concrete areas in each building will be demolished and re-poured; For each secondary maintenance concrete building in each concrete building affected by plant roots, it is necessary to use physical methods or chemical agents to remove the plant roots in the concrete area, and then repair and reinforce it after the removal is completed; For each first-level maintenance concrete building among the concrete buildings affected by the pest, the concrete areas in each building will be demolished and re-poured; For each first-level maintenance concrete building among the concrete buildings affected by insect pests, the agent is injected into the concrete or sprayed on the concrete surface to eliminate the pests, and the concrete is repaired and reinforced after the pests are eliminated; For each primary defective concrete building, gaps and holes are filled with patching materials and the outer surface is reinforced.

9. A concrete defect detection system according to claim 8, characterized in that: The specific process of judging whether the maintenance plan is effective is as follows: After the maintenance of each concrete building affected by the secondary defects is completed, each concrete building affected by the secondary defects is subjected to a secondary inspection after a preset period, and the characteristic values ​​of the plant root influence and the insect pest influence of each concrete building affected by the secondary defects are analyzed and compared with the characteristic values ​​of the plant root influence and the insect pest influence of the corresponding concrete building affected by the secondary defects before maintenance. The concrete buildings affected by the secondary defects whose characteristic values ​​of the plant root influence and the insect pest influence are less than the characteristic values ​​of the plant root influence and the insect pest influence before maintenance are obtained and recorded as effective maintenance buildings. The concrete buildings affected by the secondary defects whose characteristic values ​​of the plant root influence and the insect pest influence are greater than or equal to the characteristic values ​​of the plant root influence and the insect pest influence before maintenance are obtained and recorded as invalid maintenance buildings. The number of effective maintenance buildings is compared with the number of invalid maintenance buildings. When the number of effective maintenance buildings is greater than the number of invalid maintenance areas, it indicates that the maintenance plan is effective. Otherwise, it indicates that the maintenance plan is invalid.

10. A concrete defect detection method according to claim 1, used to implement a concrete defect detection system according to any one of claims 1 to 9, characterized in that: include: Step 1: Detection sequence analysis: used to analyze each concrete building in the target area and obtain the detection sequence of each target building; Step 2: Detection and Analysis: This is used to obtain secondary defects of each level of detected buildings based on images of each level of detected buildings, and then classify the detected buildings at each level to obtain the secondary defect-affected concrete buildings. The secondary defect characteristic values ​​of each concrete building affected by the secondary defects are then analyzed to determine the maintenance level of each concrete building affected by the secondary defects. Step 3: Maintenance plan analysis: This is used to formulate a maintenance plan based on the maintenance level of each concrete building affected by secondary defects and to determine whether the maintenance plan is effective.

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