Method and system for testing grouting fullness of prefabricated concrete building component
Through ultrasonic phased array and SVD decomposition technology combined with impact echo detection, the radiation hazards and high cost problems in detecting the grouting fullness of precast concrete building components in the prior art are solved, and a high-precision and low-cost detection effect is achieved.
Patent Information
- Application Number
- CN202411829504.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-03-04
AI Technical Summary
In the prior art, the method of detecting grouting fullness of precast concrete building components has problems of radiation hazards and high testing costs.
The image reconstruction is carried out by using ultrasonic phased array combined with SVD decomposition technology, and the fullness information of grouted building components is obtained through the impact echo detection device, and the positioning information is determined through image enhancement processing to achieve high-precision detection of grouted building components.
High-precision detection of the fullness of grouted building components is achieved, testing costs are reduced, radiation hazards are avoided, and detection efficiency is improved through intelligent alarm and remediation mechanisms.
Smart Images
Figure CN119555807A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of engineering detection, and more particularly to a method and system for testing the grouting fullness of precast concrete building components. Background Art
[0002] With the continuous development of construction engineering technology, prefabricated buildings are being built in large numbers in China, among which various prefabricated building components are widely used. In the existing prefabricated building components, in order to enhance the strength and bearing capacity of the components, metal components such as sleeves are usually buried in the concrete. The preparation quality of such building components plays a key role in the final quality of the construction project.
[0003] Therefore, in order to judge the preparation quality of prefabricated building components, in the existing technology, according to the provisions of JGJ / T485-2019 "Technical Standards for Inspection of Prefabricated Residential Buildings", it is necessary to inspect the concrete fullness of prefabricated building components. There are two main existing test methods: one is to scan the prefabricated components with X-rays, and then directly compare the results obtained by the scan, but X-rays have radiation hazards to the human body, and corresponding protective equipment has to be added during the test, which increases the test cost; the second is to bury corresponding sensors in the prefabricated components for detection. This method requires more sensors to be buried to improve the test sensitivity, and the test cost is relatively high.
[0004] Therefore, it is an urgent problem for those skilled in the art to propose a method and system for testing the grouting fullness of precast concrete building components to solve the difficulties existing in the prior art. Summary of the invention
[0005] In view of this, the present invention provides a method and system for testing the grouting fullness of precast concrete building components, which are used to solve the technical problems existing in the prior art.
[0006] In order to achieve the above object, the present invention provides the following technical solutions:
[0007] A method for testing the grouting fullness of a precast concrete building component comprises the following steps:
[0008] Placing an ultrasonic phased array on the surface of a building component;
[0009] Determine the array element layout position of the ultrasonic phased array and receive the reflected echo data from the surface of the building component and the grouting body inside the building component;
[0010] Perform SVD decomposition on the reflected echo data to obtain a reconstructed image;
[0011] Performing image enhancement processing on the reconstructed image, and determining the positioning information of the grouting building component according to the enhanced reconstructed image;
[0012] According to the positioning information, impact echo detection is performed by an impact echo detection device to obtain fullness information;
[0013] A judgment is made based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to take timely remedial measures; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.
[0014] In the above method, optionally, the specific content of determining the layout position of the array elements of the ultrasonic phased array is:
[0015] Establish a loss function and determine the parameters to be optimized in the loss function;
[0016] Obtain the value of the loss function and determine the target parameter to be optimized that minimizes the value of the loss function;
[0017] The target parameters to be optimized are used to arrange the elements of the ultrasonic phased array.
[0018] In the above method, optionally, the parameters to be optimized in the loss function include position parameters of each array element in the ultrasonic phased array.
[0019] In the above method, optionally, the value of the loss function is obtained by fusing the sidelobe levels corresponding to multiple beam directions of the ultrasonic phased array.
[0020] In the above method, optionally, the specific content of performing SVD decomposition on the reflected echo data to obtain the reconstructed image is:
[0021] Convert the reflected echo data into a data matrix and perform SVD decomposition on the data matrix, that is, find an orthogonal matrix U, a diagonal matrix Σ, and another orthogonal matrix V T , so that:
[0022] A=UΣV T ;
[0023] Select the first k largest singular values and their corresponding column vectors in U and V, and use the selected singular values and corresponding vectors to obtain the reconstructed image. The reconstructed matrix is expressed as:
[0024]
[0025] Among them, U k and V k Contains the columns corresponding to the first k largest singular values in U and V, Σ k A diagonal matrix containing the first k largest singular values.
[0026] In the above method, optionally, the image enhancement processing method is: histogram equalization or smoothing filtering.
[0027] In the above method, optionally, the specific content of performing impact echo detection by an impact echo detection device according to the positioning information to obtain the fullness information is:
[0028] According to the determined positioning information of the grouted building components, the impact echo detection device is used to detect the grouted building components to generate low-frequency stress waves. The low-frequency stress waves propagate into the interior of the grouted building components and are reflected back by the bottom surface of the grouted building components. The sensor receives the reflected echo signal and transmits the echo signal to the processing system of the impact echo detection device to obtain the fullness information through spectrum analysis.
[0029] The above method optionally repeats the above steps during the slurry replenishment process when the detected fullness information is unqualified; after the fullness information is qualified through replenishment, the processing terminal sends the fullness qualified information to the server and cancels the alarm information at the same time.
[0030] A precast concrete building component grouting fullness test system, using any of the above precast concrete building component grouting fullness test methods, comprising a placement module, a data receiving module, an image reconstruction module, an image enhancement module, an information acquisition module, and a determination module connected in sequence; wherein,
[0031] Placement module: Place the ultrasonic phased array on the surface of the building component;
[0032] Data receiving module: determines the layout position of the ultrasonic phased array elements and receives the reflected echo data from the surface of the building component and the grouting body inside the building component;
[0033] Image reconstruction module: Perform SVD decomposition on the reflected echo data to obtain the reconstructed image;
[0034] Image enhancement module: performs image enhancement processing on the reconstructed image, and determines the positioning information of the grouting building components according to the enhanced reconstructed image;
[0035] Information acquisition module: performs impact echo detection through an impact echo detection device according to the positioning information to obtain fullness information;
[0036] Judgment module: Make a judgment based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to remedy the situation in time; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.
[0037] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a method and system for testing the grouting fullness of precast concrete building components, which has the following beneficial effects:
[0038] 1) The array element layout optimized based on the loss function can make the ultrasonic phased array have good detection accuracy in multiple beam directions;
[0039] 2) The ultrasonic phased array combined with SVD decomposition technology is used for image reconstruction, and then image enhancement processing is performed to obtain a high-precision reconstructed image of the air defects inside the grouted building component structure, which can realize the detection of the fullness of the grouted building component and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0041] Figure 1 A flow chart of a method for testing the grouting fullness of a precast concrete building component provided by the present invention;
[0042] Figure 2 A structural diagram of a precast concrete building component grouting fullness testing system provided by the present invention. DETAILED DESCRIPTION
[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0044] See also Figure 1 As shown, the present invention discloses a method for testing the grouting fullness of precast concrete building components, comprising the following steps:
[0045] Placing an ultrasonic phased array on the surface of a building component;
[0046] Determine the array element layout position of the ultrasonic phased array and receive the reflected echo data from the surface of the building component and the grouting body inside the building component;
[0047] Perform SVD decomposition on the reflected echo data to obtain a reconstructed image;
[0048] Performing image enhancement processing on the reconstructed image, and determining the positioning information of the grouting building component according to the enhanced reconstructed image;
[0049] According to the positioning information, impact echo detection is performed by an impact echo detection device to obtain fullness information;
[0050] A judgment is made based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to take timely remedial measures; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.
[0051] Furthermore, the specific contents of determining the layout positions of the array elements of the ultrasonic phased array are as follows:
[0052] Establish a loss function and determine the parameters to be optimized in the loss function;
[0053] Obtain the value of the loss function and determine the target parameter to be optimized that minimizes the value of the loss function;
[0054] The target parameters to be optimized are used to arrange the elements of the ultrasonic phased array.
[0055] Specifically, after establishing the function, the constraint conditions corresponding to the loss function can also be established. For example, the aperture range corresponding to the ultrasonic phased array can be determined according to the detection environment, and the constraint conditions corresponding to the aperture range can be established; the number range of array elements can also be determined according to cost control requirements, and the constraint conditions corresponding to the number range can be established; the size of the array element can also be determined according to the process level, and the minimum spacing between the array elements can be determined according to the size, and the constraint conditions corresponding to the minimum spacing can be established.
[0056] When determining the target parameter to be optimized that minimizes the value of the loss function, the target parameter to be optimized can be obtained by optimizing the specified optimization algorithm. Here, the specified optimization algorithm can include but is not limited to any of the following: genetic algorithm, particle swarm algorithm, ant colony algorithm, simulated annealing algorithm.
[0057] Furthermore, the parameters to be optimized in the loss function include position parameters of each array element in the ultrasonic phased array.
[0058] Furthermore, the value of the loss function is obtained by fusing the sidelobe levels corresponding to multiple beam directions of the ultrasonic phased array.
[0059] Furthermore, the specific content of the reconstructed image obtained by performing SVD decomposition on the reflected echo data is:
[0060] Convert the reflected echo data into a data matrix and perform SVD decomposition on the data matrix, that is, find an orthogonal matrix U, a diagonal matrix Σ, and another orthogonal matrix V T , so that:
[0061] A=UΣV T ;
[0062] Select the first k largest singular values and their corresponding column vectors in U and V, and use the selected singular values and corresponding vectors to obtain the reconstructed image. The reconstructed matrix is expressed as:
[0063]
[0064] Among them, U k and V k Contains the columns corresponding to the first k largest singular values in U and V, Σ k A diagonal matrix containing the first k largest singular values.
[0065] Furthermore, the image enhancement processing method is: histogram equalization or smoothing filtering.
[0066] Specifically, histogram equalization: by adjusting the grayscale histogram of the image, the grayscale distribution of the image is made more uniform, thereby improving the contrast of the image.
[0067] Smoothing filter: Reduce image noise by averaging the grayscale values of adjacent pixels. Common smoothing filters include mean filter and median filter.
[0068] Furthermore, according to the positioning information, the impact echo detection is performed by the impact echo detection device, and the specific content of the fullness information is obtained as follows:
[0069] According to the determined positioning information of the grouted building components, the impact echo detection device is used to detect the grouted building components to generate low-frequency stress waves. The low-frequency stress waves propagate into the interior of the grouted building components and are reflected back by the bottom surface of the grouted building components. The sensor receives the reflected echo signal and transmits the echo signal to the processing system of the impact echo detection device to obtain the fullness information through spectrum analysis.
[0070] Specifically, the impact echo detection device can accurately detect the fullness, and the cooperation of the processing terminal can analyze and process the fullness information, so as to intelligently and quickly realize the analysis and judgment of the fullness information and realize the judgment of the fullness of the grouting building components, with high operation accuracy and convenience.
[0071] Furthermore, when the detected fullness information is unqualified, the above operation steps are repeated during the slurry replenishment process; after the fullness information is qualified through replenishment, the processing terminal sends the fullness qualified information to the server and cancels the alarm information at the same time.
[0072] Specifically, the processing terminal can be a microprocessor, or any conventional processor, controller, microcontroller or state machine, or a combination of computing components, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration; the combined circuits, elements and / or components can be implemented or executed with the aid of a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic components, discrete gate or transistor logic, discrete hardware components, or any combination designed to perform the functions described in this application.
[0073] and Figure 1 Corresponding to the method described above, the present invention also provides a precast concrete building component grouting fullness test system for testing Figure 1 The specific implementation of the method in the above example is shown in the schematic diagram of its structure. Figure 2 As shown, it includes a placement module, a data receiving module, an image reconstruction module, an image enhancement module, an information acquisition module, and a determination module connected in sequence; wherein,
[0074] Placement module: Place the ultrasonic phased array on the surface of the building component;
[0075] Data receiving module: determines the layout position of the ultrasonic phased array elements and receives the reflected echo data from the surface of the building component and the grouting body inside the building component;
[0076] Image reconstruction module: Perform SVD decomposition on the reflected echo data to obtain the reconstructed image;
[0077] Image enhancement module: performs image enhancement processing on the reconstructed image, and determines the positioning information of the grouting building components according to the enhanced reconstructed image;
[0078] Information acquisition module: performs impact echo detection through an impact echo detection device according to the positioning information to obtain fullness information;
[0079] Judgment module: Make a judgment based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to remedy the situation in time; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.
[0080] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.
[0081] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for testing the grouting fullness of precast concrete building components, characterized in that: The following steps are involved: Placing an ultrasonic phased array on the surface of a building component; Determine the array element layout position of the ultrasonic phased array and receive the reflected echo data from the surface of the building component and the grouting body inside the building component; Perform SVD decomposition on the reflected echo data to obtain a reconstructed image; Performing image enhancement processing on the reconstructed image, and determining the positioning information of the grouting building component according to the enhanced reconstructed image; According to the positioning information, impact echo detection is performed by an impact echo detection device to obtain fullness information; A judgment is made based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to take timely remedial measures; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.
2. A method for testing grouting fullness of precast concrete building components according to claim 1, characterized in that: The specific contents of determining the layout position of the array elements of the ultrasonic phased array are as follows: Establish a loss function and determine the parameters to be optimized in the loss function; Obtain the value of the loss function and determine the target parameter to be optimized that minimizes the value of the loss function; The target parameters to be optimized are used to arrange the elements of the ultrasonic phased array.
3. A method for testing grouting fullness of precast concrete building components according to claim 2, characterized in that: The parameters to be optimized in the loss function include the position parameters of each array element in the ultrasonic phased array.
4. A method for testing grouting fullness of precast concrete building components according to claim 2, characterized in that: The value of the loss function is obtained by fusion of the sidelobe levels corresponding to multiple beam directions of the ultrasonic phased array.
5. A method for testing grouting fullness of precast concrete building components according to claim 1, characterized in that: The specific content of the reconstructed image obtained by SVD decomposition of the reflected echo data is: Convert the reflected echo data into a data matrix and perform SVD decomposition on the data matrix, that is, find an orthogonal matrix U, a diagonal matrix Σ, and another orthogonal matrix V T , so that: A=UΣV T ; Select the first k largest singular values and their corresponding column vectors in U and V, and use the selected singular values and corresponding vectors to obtain the reconstructed image. The reconstructed matrix is expressed as: A k =U k S k V k T ; Among them, U k and V k Contains the columns corresponding to the first k largest singular values in U and V, Σ k A diagonal matrix containing the first k largest singular values.
6. A method for testing grouting fullness of precast concrete building components according to claim 1, characterized in that: The image enhancement processing methods are: histogram equalization or smoothing filtering.
7. A method for testing grouting fullness of precast concrete building components according to claim 1, characterized in that: According to the positioning information, the impact echo detection is performed by the impact echo detection device, and the specific content of the fullness information is obtained as follows: According to the determined positioning information of the grouted building components, the impact echo detection device is used to detect the grouted building components to generate low-frequency stress waves. The low-frequency stress waves propagate into the interior of the grouted building components and are reflected back by the bottom surface of the grouted building components. The sensor receives the reflected echo signal and transmits the echo signal to the processing system of the impact echo detection device to obtain the fullness information through spectrum analysis.
8. A method for testing grouting fullness of precast concrete building components according to claim 1, characterized in that: When the detected fullness information is unqualified, the above steps are repeated during the slurry replenishment process; after the fullness information is qualified through replenishment, the processing terminal sends the fullness qualified information to the server and cancels the alarm information at the same time.
9. A grouting fullness test system for precast concrete building components, characterized in that A method for testing the grouting fullness of precast concrete building components according to any one of claims 1 to 8 is applied, comprising a placement module, a data receiving module, an image reconstruction module, an image enhancement module, an information acquisition module, and a determination module connected in sequence; wherein: Placement module: Place the ultrasonic phased array on the surface of the building component; Data receiving module: determines the layout position of the ultrasonic phased array elements and receives the reflected echo data from the surface of the building component and the grouting body inside the building component; Image reconstruction module: Perform SVD decomposition on the reflected echo data to obtain the reconstructed image; Image enhancement module: performs image enhancement processing on the reconstructed image, and determines the positioning information of the grouting building components according to the enhanced reconstructed image; Information acquisition module: performs impact echo detection through an impact echo detection device according to the positioning information to obtain fullness information; Judgment module: Make a judgment based on the fullness information obtained. If the fullness information is unqualified, an alarm message is sent to the processing terminal to prompt the workers to remedy the situation in time; if the fullness information is qualified, a qualified fullness detection information is sent to the processing terminal.