Concrete structure health monitoring system and method based on piezoelectric intelligent aggregate

Abstract

The present invention provides a concrete structure health monitoring system and method based on a piezoelectric intelligent aggregate. The method comprises: analyzing piezoelectric detection signals generated by a distributed piezoelectric intelligent aggregate array pre-buried in a concrete structure, and determining all non-uniform pressure distribution regions in the concrete structure, thereby screening for respective piezoelectric detection signals of the non-uniform pressure distribution regions and all adjacent regions thereof; analyzing the respective piezoelectric detection signals of the non-uniform pressure distribution regions and all the adjacent regions thereof to obtain overall pressure extension distribution information of the corresponding regions, thereby determining defect regions where stress distortion has occurred in the concrete structure, and accurately positioning stress distortion anomaly regions in the defect regions; and on the basis of stress distortion degree information of all the defect regions in the concrete structure, determining whether an irreversible deformation event has occurred in the concrete structure, and providing an early warning and alert regarding the health of the concrete structure. Dynamic and continuous health monitoring is performed on the concrete structure, thus improving the continuity and accuracy of structural health monitoring of concrete.

Description

A concrete structure health monitoring system and method based on piezoelectric intelligent aggregate TECHNICAL FIELD

[0001] The present application relates to the field of concrete structure monitoring, and in particular to a concrete structure health monitoring system and method based on piezoelectric intelligent aggregate. BACKGROUND

[0002] As an important building material, concrete is affected by natural factors such as temperature and humidity of the external environment during pouring and solidification. Rapid changes in external temperature and humidity can cause uneven solidification of concrete, resulting in anisotropy of the material interaction force of the internal structure of the concrete after solidification. This anisotropy can lead to uneven stress distribution or even stress distortion in the concrete. When the internal structure of the concrete is in a state of uneven stress distribution or stress distortion for a long time, irreversible deformation such as tearing can occur in the concrete structure, causing the concrete structure to gradually crack and reducing the strength and toughness of the concrete structure. Although existing technologies can detect the internal structure of the concrete through X-ray scanning and other methods, this method cannot continuously and directionally detect the concrete structure for a long time, cannot dynamically identify the health status of the concrete structure, and reduces the continuity and accuracy of the structural health monitoring of the concrete. SUMMARY

[0003] The present application aims to provide a concrete structure health monitoring system and method based on piezoelectric intelligent aggregate, which analyzes the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the internal structure of the concrete structure, determines all uneven stress distribution areas in the internal structure of the concrete structure, and screens the piezoelectric detection signals of all adjacent areas of the uneven stress distribution areas to monitor the internal structure of the concrete structure by region; then analyzes the piezoelectric detection signals of all adjacent areas of the uneven stress distribution areas to obtain the overall stress extension distribution information of the corresponding area, determines the defect area where stress distortion occurs in the internal structure of the concrete structure, accurately locates the stress distortion abnormal area, and defines a reliable area range for subsequent identification of irreversible deformation in the internal structure of the concrete structure; further based on the stress distortion degree information of all defect areas in the internal structure of the concrete structure, judges whether irreversible deformation occurs in the internal structure, and based on the spatial distribution state of the irreversible deformation event, performs health warning and reminder of the concrete structure, dynamically and continuously monitors the health of the concrete structure, and improves the continuity and accuracy of the structural health monitoring of the concrete.

[0004] The present application is achieved by the following technical solutions:

[0005] A concrete structure health monitoring system based on piezoelectric intelligent aggregate, comprising:

[0006] An internal pressure distribution detection module is configured to acquire piezoelectric detection signals generated by a distributed piezoelectric intelligent aggregate array embedded in a concrete structure, analyze the piezoelectric detection signals, and determine all pressure distribution uneven areas in the concrete structure.

[0007] A piezoelectric detection signal screening module is configured to screen piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof based on position information of the pressure distribution uneven areas.

[0008] An internal pressure extension distribution determination module is configured to analyze the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof, and determine pressure extension distribution information of the pressure distribution uneven areas and all adjacent areas thereof.

[0009] A defect area identification module is configured to determine defect areas in which stress distortion occurs in the concrete structure based on the corresponding pressure extension distribution information of all pressure distribution uneven areas.

[0010] A structure distortion irreversible identification module is configured to determine whether irreversible deformation events occur in the concrete structure based on stress distortion degree information of all defect areas in the concrete structure.

[0011] A warning reminding module is configured to perform a concrete structure health warning reminding based on a spatial distribution state of the irreversible deformation events in the concrete structure.

[0012] Optionally, the internal pressure distribution detection module is configured to acquire piezoelectric detection signals generated by a distributed piezoelectric intelligent aggregate array embedded in a concrete structure, analyze the piezoelectric detection signals, and determine all pressure distribution uneven areas in the concrete structure, including:

[0013] Performing time variation analysis on signal intensity of piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates under a distributed piezoelectric intelligent aggregate array embedded in a concrete structure to obtain intensity variation information of the piezoelectric detection signals generated by each barium calcium titanate intelligent aggregate; determining whether the piezoelectric detection signals present a continuous variation state based on the intensity variation information of the piezoelectric detection signals; if yes, regarding an effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signals in the concrete structure as a pressure distribution uniform area; if no, regarding the effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signals in the concrete structure as a pressure distribution uneven area.

[0014] The piezoelectric detection signal screening module is configured to screen piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof based on position information of the pressure distribution uneven area, and includes the following steps:

[0015] Based on the boundary position information of each pressure distribution uneven area in the concrete structure, all barium calcium titanate zirconate smart aggregates located in each pressure distribution uneven area and adjacent areas thereof are screened out. Based on the interface positions corresponding to the screened barium calcium titanate zirconate smart aggregates, piezoelectric detection signals generated by all barium calcium titanate zirconate smart aggregates in each pressure distribution uneven area and adjacent areas thereof are extracted, and all the extracted piezoelectric detection signals are labeled according to their detection positions in the concrete structure.

[0016] Optionally, the internal pressure extension distribution determination module is configured to analyze the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof to determine pressure extension distribution information of the pressure distribution uneven area and all adjacent areas thereof, including the following steps: performing conversion processing on the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof to obtain pressure size information of the pressure distribution uneven area and all adjacent areas thereof; performing vector fitting processing on all the pressure size information based on the detection position information of the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof in the concrete structure to obtain the pressure extension distribution information of the pressure distribution uneven area and all adjacent areas thereof; and wherein the pressure extension distribution information includes pressure size distribution information and pressure direction distribution information.

[0017] The defect area identification module is configured to determine defect areas in which stress distortion occurs in the concrete structure based on the pressure extension distribution information corresponding to all pressure distribution uneven areas, and includes the following steps:

[0018] The pressure size and pressure direction change of the pressure extension distribution information corresponding to all pressure distribution uneven areas are identified to determine stress distortion azimuth angle distribution information in the concrete structure. Based on the stress distortion azimuth angle distribution information, an area in which a stress distortion average azimuth angle is greater than a preset azimuth angle threshold is determined as a defect area in which stress distortion occurs in the concrete structure.

[0019] Optionally, the structure distortion irreversible identification module is configured to determine whether irreversible deformation events occur in the concrete structure based on stress distortion degree information of all defect areas in the concrete structure, and includes the following steps:

[0020] determine whether the stress distortion diffusion trend occurs in the concrete structure based on the stress size of all defect regions inside the concrete structure and the change information of the stress twist azimuth angle; if the stress distortion diffusion trend occurs, it is determined that irreversible deformation events occur inside the concrete structure; if the stress distortion diffusion trend does not occur, it is determined that irreversible deformation events do not occur inside the concrete structure;

[0021] The early warning reminding module is used to perform concrete structure health early warning reminding based on the spatial distribution state of the irreversible deformation events inside the concrete structure, including:

[0022] Based on the spatial distribution state of the irreversible deformation events inside the concrete structure, the structure damage space proportion information inside the concrete structure is determined; and based on the structure damage space proportion information, the concrete structure health early warning reminding is performed.

[0023] A concrete structure health monitoring method based on piezoelectric intelligent aggregate, including:

[0024] The piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are acquired, the piezoelectric detection signals are analyzed, and all pressure distribution uneven regions inside the concrete structure are determined; based on the position information of the pressure distribution uneven regions, the piezoelectric detection signals of the pressure distribution uneven regions and all adjacent regions thereof are screened;

[0025] The piezoelectric detection signals of the pressure distribution uneven regions and all adjacent regions thereof are analyzed, the pressure extension distribution information of the pressure distribution uneven regions and all adjacent regions thereof is determined, the defect regions with stress distortion inside the concrete structure are determined based on the pressure extension distribution information corresponding to all pressure distribution uneven regions respectively.

[0026] Based on the stress distortion degree information of all defect regions inside the concrete structure, it is determined whether irreversible deformation events occur inside the concrete structure; and based on the spatial distribution state of the irreversible deformation events inside the concrete structure, the concrete structure health early warning reminding is performed.

[0027] Optionally, the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are acquired, the piezoelectric detection signals are analyzed, and all pressure distribution uneven regions inside the concrete structure are determined; based on the position information of the pressure distribution uneven regions, the piezoelectric detection signals of the pressure distribution uneven regions and all adjacent regions thereof are screened, including:

[0028] The piezoelectric detection signals generated by all the barium calcium titanate intelligent aggregates affiliated to the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are acquired, and time variation analysis on the signal strength is performed to obtain the strength variation information of the piezoelectric detection signal generated by each barium calcium titanate intelligent aggregate; based on the strength variation information of the piezoelectric detection signal, it is judged whether the piezoelectric detection signal presents a continuous variation state; if yes, the effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signal in the concrete structure belongs to a uniform pressure distribution area; if not, the effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signal in the concrete structure belongs to a non-uniform pressure distribution area;

[0029] Based on the boundary position information of each non-uniform pressure distribution area in the concrete structure, all barium calcium titanate intelligent aggregates located in each non-uniform pressure distribution area and its adjacent area are screened; based on the interface position corresponding to all screened barium calcium titanate intelligent aggregates, the piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates in each non-uniform pressure distribution area and its adjacent area are extracted, and all extracted piezoelectric detection signals are subjected to identification processing on their detection positions in the concrete structure.

[0030] Optionally, the piezoelectric detection signals of each non-uniform pressure distribution area and all adjacent areas thereof are analyzed to determine the pressure extension distribution information of the whole non-uniform pressure distribution area and all adjacent areas thereof; based on the pressure extension distribution information corresponding to each non-uniform pressure distribution area, a defect area in which stress distortion occurs in the concrete structure is determined, including:

[0031] The piezoelectric detection signals of each non-uniform pressure distribution area and its adjacent area are subjected to conversion processing to obtain the pressure magnitude information of the non-uniform pressure distribution area and its adjacent area; based on the detection position information of the piezoelectric detection signals corresponding to each non-uniform pressure distribution area and its adjacent area in the concrete structure, all pressure magnitude information is subjected to vector fitting processing to obtain the pressure extension distribution information of the whole non-uniform pressure distribution area and all adjacent areas thereof; wherein the pressure extension distribution information includes pressure magnitude distribution information and pressure direction distribution information;

[0032] The pressure extension distribution information corresponding to each non-uniform pressure distribution area is subjected to pressure magnitude and pressure direction variation identification to determine the stress distortion azimuth angle distribution information in the concrete structure; based on the stress distortion azimuth angle distribution information, the area corresponding to the average stress distortion azimuth angle greater than a preset azimuth angle threshold is taken as a defect area in which stress distortion occurs in the concrete structure.

[0033] Optionally, based on the stress distortion degree information of all defect areas inside the concrete structure, it is judged whether irreversible deformation event occurs inside the concrete structure; and based on the spatial distribution state of the irreversible deformation event inside the concrete structure, concrete structure health early warning is reminded, including:

[0034] Based on the stress size change information of all defect areas inside the concrete structure with stress distortion azimuth angle, it is judged whether stress distortion diffusion trend occurs inside the concrete structure; if stress distortion diffusion trend occurs, it is determined that irreversible deformation event occurs inside the concrete structure; if stress distortion diffusion trend does not occur, it is determined that irreversible deformation event does not occur inside the concrete structure;

[0035] Based on the spatial distribution state of the irreversible deformation event inside the concrete structure, the structure damage space proportion information inside the concrete structure is determined; and based on the structure damage space proportion information, concrete structure health early warning is reminded.

[0036] Optionally, based on the structure damage space proportion information, the concrete structure health early warning is reminded, and further includes:

[0037] Step S1, according to the structure damage space proportion information, the level of concrete structure health early warning is determined by using the following formula (1),

[0038] In the above formula (1), E represents the control level of concrete structure health early warning; K(a) represents the structure damage space proportion threshold value corresponding to the a-th level; μ represents the structure damage space proportion; F[] represents a non-negative detection function, if the value in the bracket is non-negative, the function value of the non-negative detection function is 1, otherwise, the function value of the non-negative detection function is 0; n represents the total number of levels;

[0039] Step S2, according to the level of concrete structure health early warning and the structure damage space proportion information, the concrete structure health early warning information is generated by using the following formula (2),

[0040] In the above formula (2), g 10 represents the generated concrete structure health early warning information, and the warning information is in the form of decimal form; len(n) represents the number of digits of the value n; << represents left shift;

[0041] Step S3, according to the level of concrete structure health early warning, the sending frequency of the concrete structure health early warning information is controlled by using the following formula (3),

[0042] In the above formula (3), f represents the sending frequency of the concrete structure health early warning information; T0 represents a unit time length.

[0043] Compared with the prior art, the present application has the following beneficial effects:

[0044] The concrete structure health monitoring system and method based on piezoelectric intelligent aggregate provided by the present application analyze the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure, determine all uneven pressure distribution regions in the concrete structure, screen the piezoelectric detection signals of the uneven pressure distribution regions and all adjacent regions thereof, and perform regional monitoring on the concrete structure; then the piezoelectric detection signals of the uneven pressure distribution regions and all adjacent regions thereof are analyzed to obtain the overall pressure extension distribution information of the corresponding regions, so as to determine the defect regions in which stress distortion occurs in the concrete structure, accurately locate the stress distortion abnormal regions, and demarcate a reliable regional range for subsequent identification of irreversible deformation of the concrete structure; based on the stress distortion degree information of all defect regions in the concrete structure, it is judged whether irreversible deformation event occurs in the concrete structure, and based on the spatial distribution state of the irreversible deformation event, the concrete structure health early warning is performed, the concrete structure is dynamically and continuously monitored, and the continuity and accuracy of the concrete structure health monitoring are improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0046] Fig. 1 is a structural schematic diagram of a concrete structure health monitoring system based on piezoelectric intelligent aggregate provided by the present application.

[0047] Fig. 2 is a flowchart of a concrete structure health monitoring method based on piezoelectric intelligent aggregate provided by the present application. DETAILED DESCRIPTION

[0048] In order to make the above objectives, characteristics and advantages of the present application more apparent, more comprehensible, the specific embodiments of the present application are described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0050] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment independent of or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0051] Please refer to Fig. 1, an embodiment of the present application provides a concrete structure health monitoring system based on piezoelectric intelligent aggregate. The concrete structure health monitoring system based on piezoelectric intelligent aggregate comprises:

[0052] The internal pressure distribution detection module is used to obtain the piezoelectric detection signal generated by the distributed piezoelectric intelligent aggregate array embedded in the internal concrete structure, analyze the piezoelectric detection signal, and determine all the internal pressure distribution uneven areas of the concrete structure;

[0053] The piezoelectric detection signal screening module is used to screen the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas based on the position information of the pressure distribution uneven area;

[0054] The internal pressure extension distribution determination module is used to analyze the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas, and determine the pressure extension distribution information of the pressure distribution uneven area and all adjacent areas as a whole;

[0055] The defect area identification module is used to determine the defect area of stress distortion occurring in the internal concrete structure based on the corresponding pressure extension distribution information of all the pressure distribution uneven areas.

[0056] a structure distortion irreversible identification module, configured to determine whether an irreversible deformation event occurs inside the concrete structure based on stress distortion degree information of all defect areas inside the concrete structure;

[0057] a warning reminding module, configured to perform a concrete structure health warning reminding based on a spatial distribution state of the irreversible deformation event inside the concrete structure.

[0058] The concrete structure health monitoring system based on the piezoelectric intelligent aggregate analyzes the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array pre-embedded inside the concrete structure, determines all pressure distribution uneven areas inside the concrete structure, screens the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof, and performs regional monitoring inside the concrete structure; then analyzes the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof, obtains the pressure extension distribution information of the corresponding areas as a whole, determines the defect areas with stress distortion inside the concrete structure, accurately locates the stress distortion abnormal areas, and delimits a reliable area range for subsequent identification of the irreversible deformation inside the concrete structure; further determines whether an irreversible deformation event occurs inside the concrete structure based on the stress distortion degree information of all defect areas inside the concrete structure, and performs a concrete structure health warning reminding based on the spatial distribution state of the irreversible deformation event, to perform dynamic and continuous health monitoring of the concrete structure, and improve the continuity and accuracy of the concrete structure health monitoring.

[0059] In another embodiment, the internal pressure distribution detection module is configured to obtain the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array pre-embedded inside the concrete structure, analyze the piezoelectric detection signals, and determine all pressure distribution uneven areas inside the concrete structure, including:

[0060] performing time variation analysis on the signal intensity of the piezoelectric detection signals generated by all barium calcium zirconate titanate intelligent aggregates under the distributed piezoelectric intelligent aggregate array pre-embedded inside the concrete structure, to obtain the intensity variation information of the piezoelectric detection signals generated by each barium calcium zirconate titanate intelligent aggregate; based on the intensity variation information of the piezoelectric detection signals, determine whether the piezoelectric detection signals present a continuous variation state; if yes, the effective detection area of the barium calcium zirconate titanate intelligent aggregate corresponding to the piezoelectric detection signals inside the concrete structure belongs to a pressure distribution uniform area; if not, the effective detection area of the barium calcium zirconate titanate intelligent aggregate corresponding to the piezoelectric detection signals inside the concrete structure belongs to a pressure distribution uneven area;

[0061] The piezoelectric detection signal screening module is used for screening the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof based on the position information of the pressure distribution uneven area, comprising:

[0062] Based on the boundary position information of all pressure distribution uneven areas in the concrete structure, all barium calcium titanate zirconate intelligent aggregates located in each pressure distribution uneven area and its adjacent area are screened; based on the interface positions corresponding to all screened barium calcium titanate zirconate intelligent aggregates, the piezoelectric detection signals generated by all barium calcium titanate zirconate intelligent aggregates in each pressure distribution uneven area and its adjacent area are extracted, and all extracted piezoelectric detection signals are subjected to identification processing about their detection positions in the concrete structure.

[0063] The beneficial effects of the above embodiments are that the piezoelectric intelligent aggregates are embedded in different positions in the concrete in an array form in advance during the pouring of the concrete, which can be, but are not limited to, barium calcium titanate intelligent aggregates, which utilize the piezoelectric properties of barium calcium titanate materials to detect the pressure inside the concrete. Each barium calcium titanate intelligent aggregate acts as an independent piezoelectric sensor and can detect the piezoelectricity of the position where it is located and the surrounding area. When the concrete is set, the piezoelectric intelligent aggregates inside the concrete will generate corresponding electrical signals under the pressure inside the concrete and transmit them to the outside through the signal lines provided by the piezoelectric intelligent aggregates. In this way, the distributed piezoelectric intelligent aggregate array can detect the overall pressure inside the concrete. The more the number of piezoelectric intelligent aggregates inside the concrete and the smaller the distance between two adjacent piezoelectric intelligent aggregates, the more accurate the piezoelectric detection signals collected can reflect the pressure state inside the concrete. Generally speaking, the piezoelectric detection signals generated by the piezoelectric intelligent aggregates are positively correlated with the pressure applied to the piezoelectric intelligent aggregates from the inside of the concrete. When the pressure distribution in a certain area inside the concrete structure is uneven, the strength of the piezoelectric detection signals generated by the corresponding barium calcium titanate intelligent aggregates will change unstably. In order to identify the uneven pressure distribution area inside the concrete structure, the time variation of the signal strength of the piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates is analyzed to obtain the strength variation information of the piezoelectric detection signals generated by each barium calcium titanate intelligent aggregate, and then it is judged whether the piezoelectric detection signals present a continuous variation state (i.e., the strength variation curve of the piezoelectric detection signals presents a continuous and smooth variation state), so as to accurately determine the uneven pressure distribution area inside the concrete structure, thereby delimiting the corresponding range for further refining analysis of the uneven pressure distribution area inside the concrete structure. In addition, based on the boundary position information of all uneven pressure distribution areas inside the concrete structure, all barium calcium titanate intelligent aggregates located in each uneven pressure distribution area and its adjacent area are screened, and the piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates in each uneven pressure distribution area and its adjacent area are extracted based on the interface positions (i.e., the piezoelectric detection signal output interface positions) corresponding to the screened barium calcium titanate intelligent aggregates. In this way, the piezoelectric detection signals formed in the uneven pressure distribution area and its adjacent area can be distinguished and identified, providing a data basis for subsequent analysis of the pressure extension distribution state inside the concrete structure.

[0064] In another embodiment, the internal pressure extension distribution determination module is configured to analyze the piezoelectric detection signals of the uneven pressure distribution area and all adjacent areas thereof to determine the pressure extension distribution information of the uneven pressure distribution area and all adjacent areas thereof as a whole, including:

[0065] The piezoelectric detection signals of the pressure uneven distribution area and the adjacent areas thereof are converted to obtain the pressure information of the pressure uneven distribution area and the adjacent areas thereof; the piezoelectric detection signals of the pressure uneven distribution area and the adjacent areas thereof are corresponded to the detection position information inside the concrete structure, and all the pressure information is vector fitting processed to obtain the pressure extension distribution information of the pressure uneven distribution area and all the adjacent areas thereof; wherein the pressure extension distribution information includes pressure size distribution information and pressure direction distribution information.

[0066] The defect area identification module is used to determine the defect area inside the concrete structure based on the stress distortion degree information of all the defect areas, and includes:

[0067] The stress distortion azimuth angle distribution information inside the concrete structure is determined by identifying the pressure size and pressure direction changes of the pressure extension distribution information of all the defect areas; and the area with an average stress distortion azimuth angle greater than a preset azimuth angle threshold is determined as the defect area inside the concrete structure.

[0068] The above embodiments have the beneficial effects that the piezoelectric detection signals of the pressure uneven distribution area and the adjacent areas thereof are converted to obtain the pressure information of the pressure uneven distribution area and the adjacent areas thereof, and the piezoelectric detection signals of the pressure uneven distribution area and the adjacent areas thereof are corresponded to the detection position information inside the concrete structure, and all the pressure information is vector fitting processed to obtain the pressure extension distribution information of the pressure uneven distribution area and all the adjacent areas thereof, so that the pressure distribution of the pressure uneven distribution area inside the concrete structure is fitted in size and direction. In addition, the stress distortion azimuth angle distribution information inside the concrete structure is determined by identifying the pressure size and pressure direction changes of the pressure extension distribution information of all the defect areas, and the area with an average stress distortion azimuth angle greater than a preset azimuth angle threshold is determined as the defect area inside the concrete structure, so that the area with excessive stress distortion inside the concrete structure is accurately positioned.

[0069] In another embodiment, the structure distortion irreversible identification module is used to determine whether an irreversible deformation event occurs inside the concrete structure based on the stress distortion degree information of all the defect areas inside the concrete structure, and includes:

[0070] determine whether the stress in the concrete structure inside has a stress distortion diffusion trend based on the information about the change of the stress in all defect areas inside the concrete structure with the stress distortion azimuth angle; if the stress distortion diffusion trend occurs, it is determined that irreversible deformation events occur inside the concrete structure; if the stress distortion diffusion trend does not occur, it is determined that irreversible deformation events do not occur inside the concrete structure;

[0071] The early warning reminding module is configured to perform concrete structure health early warning reminding based on the spatial distribution state of the irreversible deformation events inside the concrete structure, including:

[0072] Based on the spatial distribution state of the irreversible deformation events inside the concrete structure, the structural damage space proportion information inside the concrete structure is determined; and based on the structural damage space proportion information, the concrete structure health early warning reminding is performed.

[0073] The above-mentioned embodiments have the beneficial effects that whether the stress in the defect area increases with the increase of the stress distortion azimuth angle is determined based on the information about the change of the stress in all defect areas inside the concrete structure with the stress distortion azimuth angle; if yes, it is determined that the stress distortion diffusion trend occurs inside the concrete structure; if no, it is determined that the stress distortion diffusion trend does not occur inside the concrete structure. If the stress distortion diffusion trend occurs, it is determined that irreversible deformation events occur inside the concrete structure; if the stress distortion diffusion trend does not occur, it is determined that irreversible deformation events do not occur inside the concrete structure, so that the structural damage occurrence inside the concrete structure can be accurately determined. Furthermore, based on the spatial distribution state of the irreversible deformation events inside the concrete structure, the structural damage space proportion information inside the concrete structure is determined; when the structural damage space proportion information indicates that the structural damage space proportion inside the concrete structure exceeds a preset proportion threshold, the concrete structure health early warning reminding is performed (such as sending an early warning reminding notification message to a corresponding terminal platform); otherwise, the concrete structure health early warning reminding is not performed.

[0074] Please refer to FIG. 2, an embodiment of the present application provides a concrete structure health monitoring method based on piezoelectric intelligent aggregate. The concrete structure health monitoring method based on piezoelectric intelligent aggregate includes:

[0075] The piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are acquired, the piezoelectric detection signals are analyzed, and all pressure distribution uneven areas inside the concrete structure are determined; based on the position information of the pressure distribution uneven areas, the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof are screened;

[0076] analyzing the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof respectively to determine the pressure extension distribution information of the whole of the pressure distribution uneven area and all adjacent areas thereof; determining the defect area in which stress distortion occurs inside the concrete structure based on the corresponding pressure extension distribution information of all pressure distribution uneven areas respectively;

[0077] judging whether an irreversible deformation event occurs inside the concrete structure based on the stress distortion degree information of all defect areas inside the concrete structure; and performing a health warning of the concrete structure based on the spatial distribution state of the irreversible deformation event inside the concrete structure.

[0078] The piezoelectric intelligent aggregate-based concrete structure health monitoring method analyzes the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure, determines all pressure distribution uneven areas inside the concrete structure, screens the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof respectively, and performs regional monitoring on the concrete structure; then analyzes the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof respectively to obtain the pressure extension distribution information of the whole of the corresponding area, thereby determining the defect area in which stress distortion occurs inside the concrete structure, accurately locating the stress distortion abnormal area, and delineating a reliable area range for subsequent identification of irreversible deformation events inside the concrete structure; further judging whether an irreversible deformation event occurs inside the concrete structure based on the stress distortion degree information of all defect areas inside the concrete structure, and performing a health warning of the concrete structure based on the spatial distribution state of the irreversible deformation event, thereby continuously monitoring the health of the concrete structure, improving the continuity and accuracy of the health monitoring of the concrete structure.

[0079] In another embodiment, the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are obtained, the piezoelectric detection signals are analyzed, and all pressure distribution uneven areas inside the concrete structure are determined; based on the position information of the pressure distribution uneven area, the piezoelectric detection signals of the pressure distribution uneven area and all adjacent areas thereof are screened, including:

[0080] The piezoelectric detection signals generated by all the barium calcium titanate intelligent aggregates under the distributed piezoelectric intelligent aggregate array embedded in the concrete structure are acquired, time variation analysis on the signal strength is performed, and the strength variation information of the piezoelectric detection signal generated by each barium calcium titanate intelligent aggregate is obtained; based on the strength variation information of the piezoelectric detection signal, it is judged whether the piezoelectric detection signal presents a continuous variation state; if yes, the effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signal in the concrete structure belongs to a uniform pressure distribution area; if not, the effective detection area of the barium calcium titanate intelligent aggregate corresponding to the piezoelectric detection signal in the concrete structure belongs to a non-uniform pressure distribution area;

[0081] Based on the boundary position information of all the non-uniform pressure distribution areas in the concrete structure, all the barium calcium titanate intelligent aggregates located in each non-uniform pressure distribution area and its adjacent area are screened; based on the interface position corresponding to all the screened barium calcium titanate intelligent aggregates, the piezoelectric detection signals generated by all the barium calcium titanate intelligent aggregates in each non-uniform pressure distribution area and its adjacent area are extracted, and all the extracted piezoelectric detection signals are subjected to identification processing on their detection positions in the concrete structure.

[0082] The beneficial effects of the above embodiments are that the piezoelectric intelligent aggregates are embedded in different positions in the concrete in an array form in advance during the pouring of the concrete, which can be but are not limited to barium calcium titanate intelligent aggregates, which utilize the piezoelectric properties of barium calcium titanate materials to detect the pressure inside the concrete, and each barium calcium titanate intelligent aggregate acts as an independent piezoelectric sensor and can detect the piezoelectricity at its location and the surrounding area. When the concrete is set, the piezoelectric intelligent aggregates inside the concrete will generate corresponding electrical signals under the pressure inside the concrete and transmit them to the outside through the signal lines provided by the piezoelectric intelligent aggregates. In this way, the distributed piezoelectric intelligent aggregate array can detect the pressure inside the concrete globally. The more the number of piezoelectric intelligent aggregates inside the concrete and the smaller the distance between two adjacent piezoelectric intelligent aggregates, the more accurate the piezoelectric detection signals collected can reflect the pressure state inside the concrete. Generally speaking, the piezoelectric detection signals generated by the piezoelectric intelligent aggregates are positively correlated with the pressure applied to the piezoelectric intelligent aggregates from the inside of the concrete. When the pressure distribution in a certain area inside the concrete structure is uneven, the strength of the piezoelectric detection signals generated by the corresponding barium calcium titanate intelligent aggregates will change unstably. In order to identify the uneven pressure distribution area inside the concrete structure, the time variation of the signal strength of the piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates is analyzed to obtain the strength variation information of the piezoelectric detection signals generated by each barium calcium titanate intelligent aggregate, and then it is determined whether the piezoelectric detection signals present a continuous variation state (i.e., the strength variation curve of the piezoelectric detection signals presents a continuous and smooth variation state), so as to accurately determine the uneven pressure distribution area inside the concrete structure, thereby delimiting the corresponding range for further refining analysis of the uneven pressure distribution area inside the concrete structure. In addition, based on the boundary position information of all uneven pressure distribution areas inside the concrete structure, all barium calcium titanate intelligent aggregates located in each uneven pressure distribution area and its adjacent area are screened, and the piezoelectric detection signals generated by all barium calcium titanate intelligent aggregates in each uneven pressure distribution area and its adjacent area are extracted based on the interface positions (i.e., the piezoelectric detection signal output interface positions) corresponding to the screened barium calcium titanate intelligent aggregates, so as to distinguish and identify the piezoelectric detection signals formed in the uneven pressure distribution area and its adjacent area, thereby providing a data basis for subsequent analysis of the stress extension distribution state inside the concrete structure.

[0083] In another embodiment, the piezoelectric detection signals of the uneven pressure distribution area and all adjacent areas thereof are analyzed to determine the stress extension distribution information of the whole uneven pressure distribution area and all adjacent areas thereof; and based on the stress extension distribution information corresponding to all uneven pressure distribution areas, a defect area inside the concrete structure where stress distortion occurs is determined, including:

[0084] The piezoelectric detection signals of the pressure distribution uneven area and its adjacent area are converted to obtain the pressure size information of the pressure distribution uneven area and its adjacent area; based on the detection position information corresponding to the piezoelectric detection signals of the pressure distribution uneven area and its adjacent area inside the concrete structure, all the pressure size information is vector fitting processed to obtain the pressure extension distribution information of the pressure distribution uneven area and all its adjacent areas; wherein the pressure extension distribution information includes pressure size distribution information and pressure direction distribution information;

[0085] The pressure size and pressure direction change of the pressure extension distribution information corresponding to all the pressure distribution uneven areas are identified to determine the stress distortion azimuth angle distribution information inside the concrete structure; based on the stress distortion azimuth angle distribution information, the area corresponding to the average stress distortion azimuth angle greater than the preset azimuth angle threshold is determined as the defect area inside the concrete structure where stress distortion occurs.

[0086] The piezoelectric detection signals of the pressure distribution uneven area and its adjacent area are converted to obtain the pressure size information of the pressure distribution uneven area and its adjacent area, and the pressure size information is vector fitting converted to obtain the pressure extension distribution information of the pressure distribution uneven area and all its adjacent areas, thereby fitting the size and direction of the pressure distribution of the pressure distribution uneven area inside the concrete structure. Also, the pressure size and pressure direction change of the pressure extension distribution information corresponding to all the pressure distribution uneven areas are identified to determine the stress distortion azimuth angle distribution information inside the concrete structure, so that the area corresponding to the average stress distortion azimuth angle greater than the preset azimuth angle threshold is determined as the defect area inside the concrete structure where stress distortion occurs, thereby accurately positioning the area inside the concrete structure where stress distortion is too large.

[0087] In another embodiment, based on the stress distortion degree information of all the defect areas inside the concrete structure, it is judged whether an irreversible deformation event occurs inside the concrete structure; and based on the spatial distribution state of the irreversible deformation event inside the concrete structure, a concrete structure health early warning is given, including:

[0088] Based on the stress size change information with stress distortion azimuth angle of all the defect areas inside the concrete structure, it is judged whether a stress distortion diffusion trend occurs inside the concrete structure; if a stress distortion diffusion trend occurs, it is determined that an irreversible deformation event occurs inside the concrete structure; if a stress distortion diffusion trend does not occur, it is determined that an irreversible deformation event does not occur inside the concrete structure;

[0089] Based on the spatial distribution state of the irreversible deformation event inside the concrete structure, the structural damage spatial proportion information inside the concrete structure is determined; and based on the structural damage spatial proportion information, the concrete structure health early warning is reminded.

[0090] The above-mentioned embodiments have the beneficial effects that, based on the information about the change of the stress size of all defect regions inside the concrete structure with the stress distortion azimuth angle, it is determined whether the stress size of the defect region increases with the increase of the stress distortion azimuth angle, if yes, it is judged that the stress distortion diffusion trend occurs inside the concrete structure; if not, it is judged that the stress distortion diffusion trend does not occur inside the concrete structure. If the stress distortion diffusion trend occurs, it is determined that the irreversible deformation event occurs inside the concrete structure; if the stress distortion diffusion trend does not occur, it is determined that the irreversible deformation event does not occur inside the concrete structure, so that the structural damage occurrence inside the concrete structure can be accurately determined. Based on the spatial distribution state of the irreversible deformation event inside the concrete structure, the structural damage spatial proportion information inside the concrete structure is determined, and when the structural damage spatial proportion information indicates that the structural damage spatial proportion inside the concrete structure exceeds a preset proportion threshold, the concrete structure health early warning is reminded (such as sending an early warning notification message to a corresponding terminal platform); otherwise, the concrete structure health early warning is not reminded.

[0091] In another embodiment, based on the structural damage spatial proportion information, the concrete structure health early warning is reminded, and further comprising:

[0092] Step S1, according to the structural damage spatial proportion information, the control level of the concrete structure health early warning is determined by using the following formula (1),

[0093] In the above formula (1), E represents the control level of the concrete structure health early warning; K(a) represents the structural damage spatial proportion threshold corresponding to the a-th level; μ represents the structural damage spatial proportion; F[] represents a non-negative detection function, if the value in the brackets is non-negative, the function value of the non-negative detection function is 1, otherwise, the function value of the non-negative detection function is 0; n represents the total number of levels of the levels;

[0094] Step S2, according to the level of the concrete structure health early warning and the structural damage spatial proportion information, the concrete structure health early warning information is generated by using the following formula (2),

[0095] In the above formula (2), g 10represents the generated concrete structure health early warning prompt information in the form of a decimal system; len(n) represents the number of digits of the value n; << represents left shift;

[0096] In step S3, the sending frequency of the concrete structure health early warning prompt information is controlled according to the level of the concrete structure health early warning prompt by using the following formula (3),

[0097] In the above formula (3), f represents the sending frequency of the concrete structure health early warning prompt information; and T0 represents a unit time length.

[0098] The above embodiment has the beneficial effects that the level of the concrete structure health early warning prompt is determined according to the structure damage space proportion information by using the above formula (1), so that the corresponding prompt is divided into levels; the concrete structure health early warning prompt information is generated according to the level of the concrete structure health early warning prompt and the structure damage space proportion information by using the above formula (2), so that the level information and the level priority are both contained in the prompt information to facilitate the personnel receiving the early warning prompt information to process; and the sending frequency of the concrete structure health early warning prompt information is controlled according to the level of the concrete structure health early warning prompt by using the above formula (3), so that the early warning prompt information with a higher level is sent at a high frequency to prevent the personnel from missing the early warning.

[0099] Overall, the concrete structure health monitoring system and method based on piezoelectric intelligent aggregate analyzes the piezoelectric detection signals generated by the distributed piezoelectric intelligent aggregate array embedded in the concrete structure, determines all pressure distribution uneven areas in the concrete structure, screens the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof, and performs regional monitoring on the concrete structure; the piezoelectric detection signals of the pressure distribution uneven areas and all adjacent areas thereof are analyzed to obtain the overall pressure extension distribution information of the corresponding area, so as to determine the defect area of stress distortion occurring in the concrete structure, accurately locate the stress distortion abnormal area, and define a reliable area range for subsequent identification of irreversible deformation occurring in the concrete structure; based on the stress distortion degree information of all defect areas in the concrete structure, it is judged whether an irreversible deformation event occurs in the concrete structure, and based on the spatial distribution state of the irreversible deformation event, a concrete structure health early warning prompt is performed, so that the concrete structure is dynamically and continuously monitored, and the continuity and accuracy of the concrete structure health monitoring are improved.

[0100] The above is only one specific embodiment of the present application, and any improvement made on the basis of the concept of the present application is considered to be within the protection scope of the present application.

Claims

1. A health monitoring system for concrete structures based on piezoelectric smart aggregates, characterized in that, include: An internal pressure distributed detection module is used to acquire piezoelectric detection signals generated by a distributed piezoelectric smart aggregate array embedded in the concrete structure, analyze the piezoelectric detection signals, and determine all areas of uneven pressure distribution inside the concrete structure. The piezoelectric detection signal filtering module is used to filter the piezoelectric detection signals of the uneven pressure distribution region and all its adjacent regions based on the location information of the uneven pressure distribution region. The internal pressure extension distribution determination module is used to analyze the piezoelectric detection signals of the pressure uneven distribution region and all its adjacent regions to determine the overall pressure extension distribution information of the pressure uneven distribution region and all its adjacent regions. The defect area identification module is used to determine the defect area where stress distortion occurs inside the concrete structure based on the pressure extension distribution information corresponding to each of the uneven pressure distribution areas. The irreversible structural distortion identification module is used to determine whether an irreversible deformation event has occurred inside the concrete structure based on the stress distortion degree information of all defect areas inside the concrete structure. The early warning and reminder module is used to provide early warning and reminders about the health of the concrete structure based on the spatial distribution of the irreversible deformation events inside the concrete structure.

2. The concrete structure health monitoring system based on piezoelectric smart aggregate as described in claim 1, characterized in that: The internal pressure distributed detection module is used to acquire piezoelectric detection signals generated by the distributed piezoelectric smart aggregate array embedded in the concrete structure, analyze the piezoelectric detection signals, and determine all areas of uneven pressure distribution inside the concrete structure, including: The piezoelectric detection signals generated by each of the barium calcium zirconate titanate smart aggregates under the distributed piezoelectric smart aggregate array embedded in the concrete structure are acquired, and the temporal variation of the signal intensity is analyzed to obtain the intensity variation information of the piezoelectric detection signal generated by each barium calcium zirconate titanate smart aggregate. Based on the intensity variation information of the piezoelectric detection signal, it is determined whether the piezoelectric detection signal exhibits a continuous change state. If so, the effective detection area of ​​the barium calcium zirconate titanate smart aggregate corresponding to the piezoelectric detection signal inside the concrete structure belongs to a region with uniform pressure distribution; if not, the effective detection area of ​​the barium calcium zirconate titanate smart aggregate corresponding to the piezoelectric detection signal inside the concrete structure belongs to a region with uneven pressure distribution. The piezoelectric detection signal filtering module is used to filter the piezoelectric detection signals of the uneven pressure distribution region and all its adjacent regions based on the location information of the uneven pressure distribution region, including: Based on the boundary location information of each pressure uneven distribution region within the concrete structure, all barium calcium zirconate titanate smart aggregates located in each pressure uneven distribution region and its adjacent regions are screened. Based on the interface location corresponding to all screened barium calcium zirconate titanate smart aggregates, the piezoelectric detection signals generated by each barium calcium zirconate titanate smart aggregate in each pressure uneven distribution region and its adjacent regions are extracted, and all extracted piezoelectric detection signals are marked with their detection location within the concrete structure.

3. The concrete structure health monitoring system based on piezoelectric smart aggregate as described in claim 1, characterized in that: The internal pressure extension distribution determination module is used to analyze the piezoelectric detection signals of the pressure uneven distribution region and all its adjacent regions to determine the overall pressure extension distribution information of the pressure uneven distribution region and all its adjacent regions, including: The piezoelectric detection signals of the uneven pressure distribution region and its adjacent regions are converted and processed to obtain the pressure magnitude information of the uneven pressure distribution region and its adjacent regions. Based on the detection location information inside the concrete structure corresponding to the piezoelectric detection signals of the uneven pressure distribution region and its adjacent regions, all pressure magnitude information is vectorized and fitted to obtain the overall pressure extension distribution information of the uneven pressure distribution region and all its adjacent regions. The pressure extension distribution information includes pressure magnitude distribution information and pressure direction distribution information. The defect region identification module is used to determine the defect regions where stress distortion occurs inside the concrete structure based on the pressure extension distribution information corresponding to each of the uneven pressure distribution regions, including: The pressure magnitude and direction changes of the pressure extension distribution information corresponding to each of the uneven pressure distribution areas are identified to determine the stress torsion azimuth distribution information inside the concrete structure. Based on the stress torsion azimuth distribution information, the area corresponding to the average stress torsion azimuth angle being greater than the preset azimuth angle threshold is taken as the defect area where stress torsion occurs inside the concrete structure.

4. The concrete structure health monitoring system based on piezoelectric smart aggregate as described in claim 1, characterized in that: The irreversible structural distortion identification module is used to determine whether an irreversible deformation event has occurred inside the concrete structure based on the stress distortion degree information of all defect areas inside the concrete structure, including: Based on the information on the change of stress magnitude with stress torsion azimuth angle in all defect areas inside the concrete structure, it is determined whether a stress torsion diffusion trend occurs inside the concrete structure; if a stress torsion diffusion trend occurs, it is determined that an irreversible deformation event has occurred inside the concrete structure; if no stress torsion diffusion trend occurs, it is determined that no irreversible deformation event has occurred inside the concrete structure. The early warning module is used to provide early warnings about the health of the concrete structure based on the spatial distribution of the irreversible deformation events within the concrete structure, including: Based on the spatial distribution of the irreversible deformation events within the concrete structure, the spatial proportion of structural damage within the concrete structure is determined; then, based on the spatial proportion of structural damage, a health warning reminder for the concrete structure is issued.

5. A method for monitoring the health of concrete structures based on piezoelectric smart aggregates, characterized in that, include: The piezoelectric detection signals generated by the distributed piezoelectric smart aggregate array embedded in the concrete structure are acquired, and the piezoelectric detection signals are analyzed to determine all regions with uneven pressure distribution inside the concrete structure. Based on the location information of the uneven pressure distribution regions, the piezoelectric detection signals of the uneven pressure distribution regions and all their adjacent regions are filtered. The piezoelectric detection signals of the uneven pressure distribution region and all its adjacent regions are analyzed to determine the overall pressure extension distribution information of the uneven pressure distribution region and all its adjacent regions; based on the pressure extension distribution information corresponding to each of the uneven pressure distribution regions, the defect regions in which stress distortion occurs inside the concrete structure are determined. Based on the stress distortion information of all defect areas inside the concrete structure, it is determined whether an irreversible deformation event has occurred inside the concrete structure. Based on the spatial distribution of the irreversible deformation events within the concrete structure, a health warning reminder for the concrete structure is issued.

6. The method for monitoring the health of concrete structures based on piezoelectric smart aggregates as described in claim 5, characterized in that: The piezoelectric detection signal generated by the distributed piezoelectric smart aggregate array embedded in the concrete structure is obtained, and the piezoelectric detection signal is analyzed to determine all areas of uneven pressure distribution inside the concrete structure. Based on the location information of the pressure uneven distribution region, the piezoelectric detection signals of the pressure uneven distribution region and all its neighboring regions are filtered, including: The piezoelectric detection signals generated by each of the barium calcium zirconate titanate smart aggregates under the distributed piezoelectric smart aggregate array embedded in the concrete structure are acquired, and the temporal variation of the signal intensity is analyzed to obtain the intensity variation information of the piezoelectric detection signal generated by each barium calcium zirconate titanate smart aggregate. Based on the intensity variation information of the piezoelectric detection signal, it is determined whether the piezoelectric detection signal exhibits a continuous change state. If so, the effective detection area of ​​the barium calcium zirconate titanate smart aggregate corresponding to the piezoelectric detection signal inside the concrete structure belongs to the area with uniform pressure distribution. If not, then the effective detection area of ​​the barium calcium zirconate titanate smart aggregate corresponding to the piezoelectric detection signal inside the concrete structure belongs to the area of ​​uneven pressure distribution. Based on the boundary location information of each pressure uneven distribution region within the concrete structure, all barium calcium zirconate titanate smart aggregates located in each pressure uneven distribution region and its adjacent regions are screened. Based on the interface location corresponding to all screened barium calcium zirconate titanate smart aggregates, the piezoelectric detection signals generated by each barium calcium zirconate titanate smart aggregate in each pressure uneven distribution region and its adjacent regions are extracted, and all extracted piezoelectric detection signals are marked with their detection location within the concrete structure.

7. The method for monitoring the health of concrete structures based on piezoelectric smart aggregates as described in claim 5, characterized in that: Analyze the piezoelectric detection signals of the uneven pressure distribution region and all its adjacent regions to determine the overall pressure extension distribution information of the uneven pressure distribution region and all its adjacent regions. Based on the pressure extension distribution information corresponding to each of the uneven pressure distribution regions, the defect regions where stress distortion occurs inside the concrete structure are determined, including: The piezoelectric detection signals of the uneven pressure distribution region and its adjacent regions are converted and processed to obtain the pressure magnitude information of the uneven pressure distribution region and its adjacent regions. Based on the detection location information inside the concrete structure corresponding to the piezoelectric detection signals of the uneven pressure distribution region and its adjacent regions, all pressure magnitude information is vectorized and fitted to obtain the overall pressure extension distribution information of the uneven pressure distribution region and all its adjacent regions. The pressure extension distribution information includes pressure magnitude distribution information and pressure direction distribution information. The pressure magnitude and direction changes of the pressure extension distribution information corresponding to each of the uneven pressure distribution areas are identified to determine the stress torsion azimuth distribution information inside the concrete structure. Based on the stress torsion azimuth distribution information, the area corresponding to the average stress torsion azimuth angle being greater than the preset azimuth angle threshold is taken as the defect area where stress torsion occurs inside the concrete structure.

8. The method for monitoring the health of concrete structures based on piezoelectric smart aggregates as described in claim 5, characterized in that: Based on the stress distortion information of all defect areas inside the concrete structure, it is determined whether an irreversible deformation event has occurred inside the concrete structure. Based on the spatial distribution of the irreversible deformation events within the concrete structure, a health warning alert for the concrete structure is issued, including: Based on the information on the change of stress magnitude with stress torsion azimuth angle in all defect areas inside the concrete structure, it is determined whether a stress torsion diffusion trend occurs inside the concrete structure; if a stress torsion diffusion trend occurs, it is determined that an irreversible deformation event has occurred inside the concrete structure; if no stress torsion diffusion trend occurs, it is determined that no irreversible deformation event has occurred inside the concrete structure. Based on the spatial distribution of the irreversible deformation events within the concrete structure, the spatial proportion of structural damage within the concrete structure is determined; then, based on the spatial proportion of structural damage, a health warning reminder for the concrete structure is issued.

9. The method for monitoring the health of concrete structures based on piezoelectric smart aggregates as described in claim 5, characterized in that: Based on the aforementioned spatial proportion information of structural damage, the early warning and reminder for the health of concrete structures also includes: Step S1: Using the formula (1) below, determine the level of concrete structure health early warning reminder based on the spatial proportion information of the structural damage. In the above formula (1), E represents the control level for issuing health warnings for concrete structures; K(a) represents the threshold for the proportion of structural damage space corresponding to the a-th level; μ represents the proportion of structural damage space; F[] represents the non-negative detection function. If the value in the parentheses is non-negative, the function value of the non-negative detection function is 1, otherwise the function value of the non-negative detection function is 0; n represents the total number of levels. Step S2: Using the formula (2) below, generate a concrete structure health early warning information based on the level of the concrete structure health early warning and the spatial proportion of structural damage. In the above formula (2), g 10 This represents the generated health warning message for the concrete structure, and the message is in decimal format; len(n) represents calculating the number of digits in the value n; << represents left shift; Step S3: Using the following formula (3), control the sending frequency of the concrete structure health early warning reminder information according to the level of the concrete structure health early warning reminder. In the above formula (3), f represents the frequency of sending the health warning reminder information of the concrete structure; T0 represents the unit duration.

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