A method and system for monitoring the health of a concrete structure based on distributed piezoelectric ceramic sensors

Abstract

The application provides a concrete structure health monitoring method and system based on a distributed piezoelectric ceramic sensor, which detects pressure data of a concrete structure by using a distributed piezoelectric ceramic sensor, obtains corresponding pressure field distribution information of the concrete structure, and performs vectorization calibration on stress conditions of the concrete structure; based on the pressure field distribution information, obtains pressure deformation trends of all regions of the concrete structure, identifies abnormal pressure regions, performs regional calibration on the concrete structure, visually identifies the abnormal pressure regions, obtains structure defect information, combines with environmental information, judges whether there is a structure defect deterioration trend, and effectively predicts structure defect changes of the concrete structure; based on internal stress information of the concrete structure, accurately judges whether the concrete structure collapses, and performs alarm notification operation, so that long-time continuous and comprehensive monitoring of the concrete structure is realized, and real-time performance and reliability of the concrete structure health monitoring are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil construction monitoring, and in particular to a concrete structure health monitoring method and system based on distributed piezoelectric ceramic sensors. BACKGROUND

[0002] Building structures such as bridge piers or tunnel arch surfaces are formed by pouring concrete, and the corresponding concrete structures will deform under external forces, which will not pose a structural safety hazard to the concrete structures. However, in the long-term use of concrete structures, they will inevitably be affected by vibration pressure generated by vehicle driving or weathering, and will inevitably produce structural defects such as cracks, and with the accumulation of structural defects over time, the structural defects of the concrete structures will continue to worsen, resulting in a large safety hazard of the concrete structures. In order to ensure the structural safety of the concrete structures, health monitoring of the concrete structures is required, and currently, periodic manual surveying of the concrete structures is performed, but this method cannot continuously and comprehensively monitor the structural defects of the concrete structures over a long period of time, reducing the timeliness and reliability of the health monitoring of the concrete structures. SUMMARY

[0003] The present application aims to provide a concrete structure health monitoring method and system based on distributed piezoelectric ceramic sensors, which detects the pressure data received by the concrete structures using distributed piezoelectric ceramic sensors, thereby obtaining the corresponding pressure field distribution information of the concrete structures, and vectorizing the calibration of the stress conditions of the concrete structures; based on the pressure field distribution information, the pressure deformation trend of all regions subordinate to the concrete structures is obtained, thereby identifying the abnormal compression regions therein, implementing regional calibration of the concrete structures, visually identifying the abnormal compression regions, obtaining information on structural defects, and combining environmental information to determine whether there is a structural defect deterioration trend, thereby effectively predicting changes in structural defects of the concrete structures; based on the internal stress information of the concrete structures, accurate judgment of whether to collapse is performed, and alarm notification operations are performed, thereby realizing long-term continuous and comprehensive monitoring of the concrete structures, and improving the real-time performance and reliability of the health monitoring of the concrete structures.

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

[0005] A concrete structure health monitoring method based on distributed piezoelectric ceramic sensors, comprising:

[0006] Collecting pressure data generated by the distributed piezoelectric ceramic sensors installed on the concrete structures, analyzing the pressure data, and obtaining the pressure field distribution information of the entire concrete structure under the action of external forces;

[0007] determine a pressure deformation trend of all regions under the concrete structure based on the pressure field distribution information;

[0008] determine an abnormal pressure region existing in the concrete structure based on the pressure deformation trend;

[0009] collect an image of the abnormal pressure region, analyze the image, and obtain structure defect existing information of the abnormal pressure region;

[0010] judge whether the abnormal pressure region has a structure defect deterioration trend based on the structure defect existing information and environmental information corresponding to a position of the abnormal pressure region;

[0011] judge whether the concrete structure as a whole will have a collapse event based on internal stress information of the abnormal pressure region having the structure defect deterioration trend, and perform corresponding alarm notification operations.

[0012] Optionally, pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure is collected, and the pressure data is analyzed to obtain pressure field distribution information of the concrete structure as a whole formed under external force, including:

[0013] collect pressure data generated by all piezoelectric ceramic sensing units included in the distributed piezoelectric ceramic sensor installed on the concrete structure;

[0014] convert the pressure data into corresponding pressure vectors based on installation positions and installation postures of the piezoelectric ceramic sensing units on the concrete structure;

[0015] generate the pressure field distribution information of the concrete structure as a whole formed under external force based on the pressure vectors corresponding to all piezoelectric ceramic sensing units;

[0016] determine a pressure deformation trend of all regions under the concrete structure based on the pressure field distribution information, including:

[0017] extract surface pressure distribution information of each region under the concrete structure from the pressure field distribution information; determine a pressure deformation trend of the region based on the surface pressure distribution information and a shape and size of a pressure-acting surface of the region; wherein the pressure deformation trend includes a deformation direction and a deformation amplitude of the pressure-acting surface of the region under surface pressure.

[0018] Optionally, the abnormal pressure region existing in the concrete structure is determined based on the pressure deformation trend, including:

[0019] determine whether the deformation of the pressure-acting surface of the region currently occurring is torsional deformation and whether the torsional deformation exceeds the maximum tolerable deformation of the region based on the pressure deformation trend including the deformation direction and deformation amplitude of the pressure-acting surface of the region under surface pressure;

[0020] collect an image of the pressure-abnormal region, analyze the image, and obtain structure defect existence information of the pressure-abnormal region, including:

[0021] collect binocular images of the surface of the pressure-abnormal region to generate a three-dimensional image of the surface of the pressure-abnormal region; analyze the three-dimensional image to obtain the number, distribution area, distribution density, and average depth of structure cracks on the surface of the pressure-abnormal region, which are used as the structure defect existence information.

[0022] Optionally, determine whether the pressure-abnormal region has a structure defect deterioration trend based on the structure defect existence information and environmental information corresponding to the location of the pressure-abnormal region, including:

[0023] determine whether the number, area, distribution density, or average depth of structure cracks on the surface of the pressure-abnormal region has an increasing trend based on the structure defect existence information and wind speed / wind direction information corresponding to the location of the pressure-abnormal region; if so, it indicates that the pressure-abnormal region has a structure defect deterioration trend;

[0024] determine whether the entire concrete structure will have a collapse event based on internal stress information of the pressure-abnormal region having a structure defect deterioration trend, and perform corresponding alarm notification operations, including:

[0025] obtain internal stress information of the pressure-abnormal region having a structure defect deterioration trend based on pressure field distribution information corresponding to the pressure-abnormal region and structure defect morphology information of the pressure-abnormal region having a structure defect deterioration trend;

[0026] determine whether the pressure-abnormal region having a structure defect deterioration trend is in an internal stress overload state based on the internal stress information; if so, determine whether the entire concrete structure will have a collapse event, and perform corresponding alarm notification operations.

[0027] Optionally, determine whether the number, area, distribution density, or average depth of structure cracks on the surface of the pressure-abnormal region has an increasing trend based on the structure defect existence information and wind speed / wind direction information corresponding to the location of the pressure-abnormal region, including:

[0028] Step S1, using the following formula (1), according to the structural defect existence information, the wind speed / wind direction information corresponding to the position of the abnormal pressure area and the normal vector of the surface of the abnormal pressure area, the integrated vertical wind speed value on the surface of the abnormal pressure area is obtained,

[0029]

[0030] In the above formula (1), V represents the integrated vertical wind speed value on the surface of the abnormal pressure area; V(a) represents the wind speed value of the a-th wind direction on the surface of the abnormal pressure area; represents the direction vector of the a-th wind direction on the surface of the abnormal pressure area; represents the direction vector of the a-th wind direction on the surface of the abnormal pressure area; represents the normal vector of the surface of the abnormal pressure area; || represents the modulus; P represents the total number of wind directions on the surface of the abnormal pressure area;

[0031] Step S2, using the following formula (2), according to the structural defect existence information, the wind speed / wind direction information corresponding to the position of the abnormal pressure area and the normal vector of the surface of the abnormal pressure area, the weight value of each wind direction is obtained,

[0032]

[0033] In the above formula (2), G(a) represents the weight value of the a-th wind direction on the surface of the abnormal pressure area; F[] represents a positive number selection function, if the value in the brackets is positive, the function value of the positive number selection function is the value in its brackets, if the value in the brackets is not positive, the function value of the positive number selection function is 0;

[0034] Step S3, using the following formula (3), according to the weight value of each wind direction, the wind speed value of each wind direction and the integrated vertical wind speed value on the surface of the abnormal pressure area, it is judged whether the structural cracks on the surface of the abnormal pressure area have the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth,

[0035]

[0036] In the above formula (3), E represents the judgment value of judging whether the structural cracks on the surface of the abnormal pressure area have the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth;

[0037] If E=1, it indicates that the structural cracks on the surface of the abnormal pressure area have the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth;

[0038] If E=0, it indicates that the structural crack of the abnormal compression region surface does not have the trend of increasing in number, area, distribution density or average depth.

[0039] The application further provides a concrete structure health monitoring system based on a distributed piezoelectric ceramic sensor, comprising:

[0040] a pressure field determination module, configured to collect pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure, analyze the pressure data, and obtain pressure field distribution information of the whole concrete structure formed under external force;

[0041] a deformation trend determination module, configured to determine pressure deformation trends of all regions subordinate to the concrete structure based on the pressure field distribution information;

[0042] an abnormal region determination module, configured to determine an abnormal compression region existing in the concrete structure based on the pressure deformation trends;

[0043] a structural defect identification module, configured to collect images of the abnormal compression region, analyze the images, and obtain structural defect existing information of the abnormal compression region;

[0044] a structural defect deterioration trend identification module, configured to judge whether the abnormal compression region has a structural defect deterioration trend based on the structural defect existing information and environmental information corresponding to the position of the abnormal compression region;

[0045] an alarm notification module, configured to judge whether the whole concrete structure will have a collapse event based on internal stress information of the abnormal compression region having a structural defect deterioration trend, and perform corresponding alarm notification operation.

[0046] Optionally, the pressure field determination module collects pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure, analyzes the pressure data, and obtains pressure field distribution information of the whole concrete structure formed under external force, which comprises:

[0047] based on the pressure deformation trends including the deformation direction and deformation amplitude of the pressure action surface of the region under surface pressure, judging whether the current deformation of the pressure action surface of the region belongs to torsional deformation and whether the torsional deformation exceeds the maximum tolerable deformation of the region; if yes, the region is determined to be the abnormal compression region;

[0048] the deformation trend determination module determines the pressure deformation trends of all regions subordinate to the concrete structure based on the pressure field distribution information, which comprises:

[0049] extract surface pressure distribution information of each region under the concrete structure from the pressure field distribution information; determine a pressure deformation trend of the region based on the surface pressure distribution information and a shape and size of a pressure-acting surface of the region; wherein the pressure deformation trend comprises a deformation direction and a deformation amplitude of the pressure-acting surface of the region under surface pressure.

[0050] Optionally, the abnormal region determining module determines a compression abnormal region existing in the concrete structure based on the pressure deformation trend, comprising:

[0051] determines whether a deformation currently occurring on the pressure-acting surface of the region belongs to torsional deformation and whether the torsional deformation exceeds a maximum tolerable deformation of the region based on the fact that the pressure deformation trend comprises the deformation direction and the deformation amplitude of the pressure-acting surface of the region under surface pressure; if so, it is determined that the region belongs to the compression abnormal region;

[0052] The structure defect identifying module collects an image of the compression abnormal region, analyzes the image, and obtains structure defect existing information of the compression abnormal region, comprising:

[0053] collects binocular images of a surface of the compression abnormal region to generate a three-dimensional image of the surface of the compression abnormal region; analyzes the three-dimensional image to obtain a number of structural cracks, a distribution area of structural cracks, a distribution density of structural cracks, and an average depth of structural cracks on the surface of the compression abnormal region, which are used as the structure defect existing information.

[0054] Optionally, the structure defect deterioration trend identifying module determines whether the compression abnormal region has a structure defect deterioration trend based on the structure defect existing information and environmental information corresponding to a location of the compression abnormal region, comprising:

[0055] determines whether the number of structural cracks, the distribution area of structural cracks, the distribution density of structural cracks, or the average depth of structural cracks on the surface of the compression abnormal region has a trend of increasing based on the structure defect existing information and wind speed / wind direction information corresponding to the location of the compression abnormal region; if so, it indicates that the compression abnormal region has a structure defect deterioration trend;

[0056] The alarm notification module determines whether the whole concrete structure will have a collapse event based on internal stress information of the compression abnormal region having a structure defect deterioration trend, and performs corresponding alarm notification operations, comprising:

[0057] obtains the internal stress information of the compression abnormal region having a structure defect deterioration trend based on pressure field distribution information corresponding to the compression abnormal region having a structure defect deterioration trend and structure defect morphology information of the compression abnormal region having a structure defect deterioration trend.

[0058] Based on the internal stress information, it is determined whether the pressure abnormal area with the structural defect deterioration trend is in an internal stress overload state, and if yes, it is determined whether the whole concrete structure will have a collapse event, so as to perform corresponding alarm notification operation.

[0059] Compared with the prior art, the present application has the following beneficial effects:

[0060] The method and system for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor provided by the present application utilize the distributed piezoelectric ceramic sensor to detect the pressure data received by the concrete structure, so as to obtain the corresponding pressure field distribution information of the concrete structure, and vectorize the stress condition of the concrete structure; based on the pressure field distribution information, the pressure deformation trend of all regions subordinate to the concrete structure is obtained, so as to identify the pressure abnormal area, realize the regional calibration of the concrete structure, visually identify the pressure abnormal area, obtain the information about the existence of structural defects, and judge whether there is a structural defect deterioration trend in combination with the environmental information, so as to effectively predict the change of structural defects of the concrete structure; based on the internal stress information of the concrete structure, it is accurately determined whether the concrete structure will collapse, and alarm notification operation is performed, so as to realize long-time continuous and comprehensive monitoring of the concrete structure, and improve the real-time performance and reliability of the health monitoring of the concrete structure. BRIEF DESCRIPTION OF DRAWINGS

[0061] 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 as follows. 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:

[0062] Figure 1 The flowchart of the method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor provided by the present application is shown.

[0063] Figure 2 The structural diagram of the health monitoring system for a concrete structure provided by the present application is shown. DETAILED DESCRIPTION

[0064] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, 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 purpose of description, only the parts related to the present application are shown in the drawings, rather than 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 the present application.

[0065] 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.

[0066] In this paper, the term "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 mutually exclusive 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.

[0067] Please refer to Figure 1 An embodiment of the present application provides a concrete structure health monitoring method based on distributed piezoelectric ceramic sensor, which comprises the following steps of:

[0068] Collecting pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure, analyzing the pressure data, and obtaining pressure field distribution information of the whole concrete structure under external force;

[0069] Based on the pressure field distribution information, determining the pressure deformation trend of all regions of the concrete structure;

[0070] Based on the pressure deformation trend, determining the abnormal compression region existing in the concrete structure;

[0071] Collecting the image of the abnormal compression region, analyzing the image, and obtaining the structure defect existing information of the abnormal compression region;

[0072] Based on the structure defect existing information and the environmental information corresponding to the position of the abnormal compression region, judging whether the abnormal compression region has a structure defect deterioration trend;

[0073] Based on the internal stress information of the pressure abnormal area with the structure defect deterioration trend, it is judged whether the whole concrete structure will collapse, and corresponding alarm notification operation is performed.

[0074] The embodiment has the following beneficial effects. The method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor detects pressure data of the concrete structure by using a distributed piezoelectric ceramic sensor, so as to obtain corresponding pressure field distribution information of the concrete structure, and vectorizes the stress state of the concrete structure. Based on the pressure field distribution information, the pressure deformation trend of all regions of the concrete structure is obtained, so as to identify a pressure abnormal region, realize regional calibration of the concrete structure, visually identify the pressure abnormal region, obtain structure defect information, and judge whether there is a structure defect deterioration trend in combination with environmental information, so as to effectively predict the change of the structure defect of the concrete structure. Based on the internal stress information of the concrete structure, it is accurately judged whether the concrete structure will collapse, and alarm notification operation is performed, so as to realize long-time continuous and comprehensive monitoring of the concrete structure, and improve the real-time performance and reliability of the health monitoring of the concrete structure.

[0075] In another embodiment, pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure is collected, and the pressure data is analyzed to obtain pressure field distribution information of the whole concrete structure under external force, including:

[0076] The pressure data generated by all piezoelectric ceramic sensor units included in the distributed piezoelectric ceramic sensor installed on the concrete structure is collected;

[0077] Based on the installation position and installation posture of the piezoelectric ceramic sensor unit on the concrete structure, the pressure data is converted into corresponding pressure vectors;

[0078] Based on the pressure vectors corresponding to all piezoelectric ceramic sensor units, the pressure field distribution information of the whole concrete structure under external force is generated;

[0079] Based on the pressure field distribution information, the pressure deformation trend of all regions of the concrete structure is determined, including:

[0080] The surface pressure distribution information of each region of the concrete structure is extracted from the pressure field distribution information. Based on the surface pressure distribution information and the shape and size of the pressure-acting surface of the region, the pressure deformation trend of the region is determined. The pressure deformation trend includes the deformation direction and deformation amplitude of the pressure-acting surface of the region under surface pressure.

[0081] The beneficial effects of the above embodiments are that the outer surface and the interior of the concrete structure such as the pier or the tunnel arch are respectively provided with piezoelectric ceramic sensing units at multiple different positions, thereby jointly forming a distributed piezoelectric ceramic sensor. Each piezoelectric ceramic sensing unit can independently detect the pressure data at the position thereof. The distributed piezoelectric ceramic sensor can perform multi-point synchronous pressure detection on the concrete structure and obtain pressure data about different positions of the concrete structure. Each piezoelectric ceramic sensing unit is installed at the corresponding position of the concrete structure in the corresponding orientation. According to the installation position coordinates and the installation attitude (such as the installation pitch angle and the installation deviation angle) of the piezoelectric ceramic sensing unit on the concrete structure, the pressure data detected by the piezoelectric ceramic sensing unit is vector-converted to obtain a corresponding pressure vector. Then, the pressure vectors corresponding to all piezoelectric ceramic sensing units are combined to construct pressure field distribution information about the entire concrete structure formed under the action of external force, thereby vectorizing the pressure stress condition of the entire concrete structure. In addition, the concrete structure can be divided into a plurality of three-dimensional regions. Then, the surface pressure distribution information of each three-dimensional region is extracted from the pressure field distribution information based on the boundary of each three-dimensional region. The surface pressure distribution information can be, but is not limited to, the pressure size and the pressure direction corresponding to the pressure-acting surface of each three-dimensional region in the pressure field distribution information. Then, according to the surface pressure distribution information and the shape and area of the pressure-acting surface of the three-dimensional region, the deformation direction and the deformation trend of the three-dimensional region under the action of pressure are determined, thereby determining the deformation condition of the concrete structure caused by pressure in a region-by-region manner.

[0082] In another embodiment, based on the pressure deformation trend, a pressure-abnormal region existing in the concrete structure is determined, including:

[0083] Based on the pressure deformation trend, it is determined whether the deformation currently occurring on the pressure-acting surface of the region belongs to torsional deformation and whether the torsional deformation exceeds the maximum tolerable deformation of the region; if so, it is determined that the region belongs to the pressure-abnormal region;

[0084] An image of the pressure-abnormal region is collected, and the image is analyzed to obtain structure defect existence information of the pressure-abnormal region, including:

[0085] A binocular image of the surface of the pressure-abnormal region is collected to generate a three-dimensional image of the surface of the pressure-abnormal region. The three-dimensional image is analyzed to obtain the number, the distribution area, the distribution density, and the average depth of the structure cracks on the surface of the pressure-abnormal region, which are used as the structure defect existence information.

[0086] The beneficial effects of the above embodiments are that, based on the deformation direction and deformation amplitude of the pressure-acting surface of the stereoscopic area, it is determined whether the current deformation of the stereoscopic area belongs to a distortion deformation (i.e., whether the distortion angle of the deformation exceeds a preset angle threshold in three-dimensional space), and it is further determined whether the deformation amplitude of the distortion deformation exceeds the maximum tolerable deformation amplitude of the stereoscopic area itself. If both conditions are met, it is determined that the stereoscopic area belongs to a compression abnormal area. At this time, the compression abnormal area of the concrete structure is photographed by corresponding binoculars to obtain a three-dimensional image of the compression abnormal area, and the three-dimensional image is subjected to structural crack identification to obtain the number, distribution area, distribution density, and average depth of the structural cracks existing on the surface of the compression abnormal area, thereby quantitatively calibrating the existence state of the structural cracks in the compression abnormal area.

[0087] In another embodiment, based on the structural defect existence information and the environmental information corresponding to the location of the compression abnormal area, it is determined whether the compression abnormal area has a structural defect deterioration trend, including:

[0088] Based on the structural defect existence information and the wind speed / wind direction information corresponding to the location of the compression abnormal area, it is determined whether the structural cracks on the surface of the compression abnormal area have a trend of increasing in number, area, distribution density, or average depth. If so, it indicates that the compression abnormal area has a structural defect deterioration trend;

[0089] Based on the internal stress information of the compression abnormal area with a structural defect deterioration trend, it is determined whether the entire concrete structure will have a collapse event, and corresponding alarm notification operations are performed, including:

[0090] Based on the pressure field distribution information corresponding to the compression abnormal area with a structural defect deterioration trend and the structural defect morphology information of the compression abnormal area with a structural defect deterioration trend, the internal stress information of the compression abnormal area with a structural defect deterioration trend is obtained;

[0091] Based on the internal stress information, it is determined whether the compression abnormal area with a structural defect deterioration trend is in an internal stress overload state. If so, it is determined whether the entire concrete structure will have a collapse event, and corresponding alarm notification operations are performed.

[0092] The beneficial effects of the above embodiments are that the concrete structure will undergo corresponding weathering under the action of wind. When the concrete structure has more structural cracks, the cracks are more densely distributed and the crack depth is greater, the weathering progress will be further aggravated, the structural cracks will continue to expand, and even the surface layer of the concrete structure will peel off. Therefore, by combining the number of structural cracks on the surface of the abnormal compression area, the distribution area of the structural cracks, the distribution density of the structural cracks, the average depth of the structural cracks, and the wind speed / wind direction information corresponding to the position of the abnormal compression area, the weathering effect of the abnormal compression area is simulated and simulated to determine whether the structural cracks on the surface of the abnormal compression area have a trend of increasing in number, increasing in area, increasing in distribution density, or increasing in average depth, thereby accurately identifying the deterioration trend of the structural defects in the abnormal compression area in real time. In addition, based on the pressure field distribution information of the abnormal compression area with a deterioration trend of structural defects and the structural defect morphology information of the abnormal compression area with a deterioration trend of structural defects, the internal stress of the abnormal compression area with a deterioration trend of structural defects is simulated to obtain the corresponding internal stress information (i.e. internal stress size and distribution direction). Then, the internal stress information is compared with the internal stress load limit of the abnormal compression area with a deterioration trend of structural defects to determine whether the abnormal compression area with a deterioration trend of structural defects is in an internal stress overload state, and an alarm notification operation in the form of corresponding message broadcast sending is performed when the abnormal compression area with a deterioration trend of structural defects is in an internal stress overload state.

[0093] In another embodiment, based on the structural defect existence information and the wind speed / wind direction information corresponding to the position of the abnormal compression area, it is determined whether the structural cracks on the surface of the abnormal compression area have a trend of increasing in number, increasing in area, increasing in distribution density, or increasing in average depth, comprising:

[0094] Step S1, using the following formula (1), according to the structural defect existence information, the wind speed / wind direction information corresponding to the position of the abnormal compression area, and the normal vector on the surface of the abnormal compression area, the integrated vertical wind speed value on the surface of the abnormal compression area is obtained,

[0095]

[0096] In the above formula (1), V represents the integrated vertical wind speed value on the surface of the abnormal compression area; V(a) represents the wind speed value of the a-th wind direction on the surface of the abnormal compression area; represents the direction vector of the a-th wind direction on the surface of the abnormal compression area; represents the normal vector on the surface of the abnormal compression area; || represents the modulus; P represents the total number of wind directions on the surface of the abnormal compression area;

[0097] Step S2, using the following formula (2), according to the structure defect existence information, the wind speed / wind direction information corresponding to the position of the abnormal pressure area and the normal vector of the surface of the abnormal pressure area, the weight value of each wind direction is obtained,

[0098]

[0099] In the above formula (2), G(a) represents the weight value of the a-th wind direction on the surface of the abnormal pressure area; F[] represents a positive number selection function, if the value in the brackets is positive, the function value of the positive number selection function is the value in the brackets, if the value in the brackets is not positive, the function value of the positive number selection function is 0;

[0100] Step S3, using the following formula (3), according to the weight value of each wind direction, the wind speed value of each wind direction and the comprehensive vertical wind speed value on the surface of the abnormal pressure area, it is judged whether the structure crack on the surface of the abnormal pressure area has the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth,

[0101]

[0102] In the above formula (3), E represents the judgment value of judging whether the structure crack on the surface of the abnormal pressure area has the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth;

[0103] If E=1, it indicates that the structure crack on the surface of the abnormal pressure area has the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth;

[0104] If E=0, it indicates that the structure crack on the surface of the abnormal pressure area does not have the trend of increasing in number, increasing in area, increasing in distribution density or increasing in average depth.

[0105] The beneficial effects of the above embodiments are as follows: using the above formula (1), based on the information of the existence of the structural defect, the wind speed / direction information corresponding to the location of the pressure anomaly area, and the normal vector of the surface of the pressure anomaly area, the comprehensive vertical wind speed value on the surface of the pressure anomaly area is obtained, thereby knowing the overall wind conditions, which facilitates the subsequent overall analysis of the surface of the pressure anomaly area; then using the above formula (2), based on the information of the existence of the structural defect, the wind speed / direction information corresponding to the location of the pressure anomaly area, and the normal vector of the surface of the pressure anomaly area, the weight value of each wind direction is obtained, thereby performing independent analysis of each wind direction, with the aim of targeted research and calculation for each wind direction to ensure the accuracy of the system judgment; finally using the above formula (3), based on the weight value of each wind direction, the wind speed value of each wind direction, and the comprehensive vertical wind speed value on the surface of the pressure anomaly area, it is determined whether there is a trend of increasing number, increasing area, increasing distribution density, or increasing average depth of structural cracks on the surface of the pressure anomaly area, and then through the comprehensive analysis of the overall wind direction state and the state of independent wind directions, a precise judgment is made to ensure the reliability of the system.

[0106] Please see Figure 2 As shown, an embodiment of this application provides a health monitoring system for concrete structures, comprising:

[0107] The pressure field determination module collects pressure data generated by distributed piezoelectric ceramic sensors installed on the concrete structure, analyzes the pressure data, and obtains the pressure field distribution information formed by the entire concrete structure under the action of external forces.

[0108] The deformation trend determination module determines the pressure deformation trend of all regions under the concrete structure based on the pressure field distribution information.

[0109] The abnormal area determination module determines the abnormal pressure areas in the concrete structure based on the pressure deformation trend.

[0110] The structural defect identification module acquires images of the pressure-abnormal area, analyzes the images, and obtains information on the existence of structural defects in the pressure-abnormal area.

[0111] The structural defect deterioration trend identification module determines whether there is a structural defect deterioration trend in the pressure anomaly area based on the structural defect existence information and the environmental information corresponding to the location of the pressure anomaly area.

[0112] The alarm notification module determines whether the overall concrete structure will collapse based on the internal stress information of the abnormal pressure area where structural defects are showing a worsening trend, and then performs corresponding alarm notification operations.

[0113] The health monitoring system for the concrete structure has the beneficial effects that the health monitoring system for the concrete structure detects pressure data of the concrete structure by using the distributed piezoelectric ceramic sensor, obtains corresponding pressure field distribution information of the concrete structure, and vectorizes calibration of stress conditions of the concrete structure; based on the pressure field distribution information, obtains pressure deformation trends of all regions of the concrete structure, identifies abnormal compression regions, realizes regional calibration of the concrete structure, visually identifies the abnormal compression regions, obtains information of structural defects, judges whether there is a structural defect deterioration trend in combination with environmental information, effectively predicts changes of the structural defects of the concrete structure; based on internal stress information of the concrete structure, accurately judges whether the concrete structure collapses, and performs alarm notification operation, thereby realizing long-time continuous and comprehensive monitoring of the concrete structure, and improving real-time performance and reliability of health monitoring of the concrete structure.

[0114] In another embodiment, the pressure field determination module collects pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure, analyzes the pressure data, and obtains pressure field distribution information of the whole concrete structure under external force, including:

[0115] Based on the pressure deformation trend including the deformation direction and deformation amplitude of the pressure action surface of the region under surface pressure, it is judged whether the current deformation of the pressure action surface of the region belongs to torsional deformation, and whether the torsional deformation exceeds the maximum tolerable deformation of the region; if so, it is determined that the region belongs to the abnormal compression region;

[0116] The deformation trend determination module determines the pressure deformation trend of all regions of the concrete structure based on the pressure field distribution information, including:

[0117] The surface pressure distribution information of each region of the concrete structure is extracted from the pressure field distribution information; based on the surface pressure distribution information and the shape and size of the pressure action surface of the region, the pressure deformation trend of the region is determined; wherein the pressure deformation trend includes the deformation direction and deformation amplitude of the pressure action surface of the region under surface pressure.

[0118] The beneficial effects of the above embodiments are that the outer surface and the interior of the concrete structure such as the pier or the tunnel arch are respectively provided with piezoelectric ceramic sensing units at multiple different positions, thereby jointly forming a distributed piezoelectric ceramic sensor. Each piezoelectric ceramic sensing unit can independently detect the pressure data at the position thereof. The distributed piezoelectric ceramic sensor can perform multi-point synchronous pressure detection on the concrete structure and obtain pressure data about different positions of the concrete structure. Each piezoelectric ceramic sensing unit is installed at a corresponding position point of the concrete structure in a corresponding orientation. According to the installation position coordinates and installation posture (such as installation pitch angle and installation deviation angle) of the piezoelectric ceramic sensing unit on the concrete structure, the pressure data detected by the piezoelectric ceramic sensing unit is vector-converted to obtain a corresponding pressure vector. Then, the pressure vectors corresponding to all piezoelectric ceramic sensing units are combined to construct pressure field distribution information about the entire concrete structure formed under the action of external force, thereby vectorizing the pressure stress condition of the entire concrete structure. In addition, the concrete structure can be divided into a plurality of three-dimensional regions. Then, the surface pressure distribution information of each three-dimensional region is extracted from the pressure field distribution information based on the boundary of each three-dimensional region. The surface pressure distribution information can be, but is not limited to, the pressure size and pressure direction corresponding to the pressure action surface of each three-dimensional region in the pressure field distribution information. Then, according to the surface pressure distribution information and the shape and area of the pressure action surface of the three-dimensional region, the deformation direction and deformation trend of the three-dimensional region under the action of pressure are determined, thereby determining the deformation condition of the concrete structure caused by pressure in a region-by-region manner.

[0119] In another embodiment, the abnormal region determination module determines a pressure abnormal region existing in the concrete structure based on the pressure deformation trend, including:

[0120] Based on the pressure deformation trend including the deformation direction and deformation amplitude of the pressure action surface of the region under the surface pressure, it is judged whether the current deformation of the pressure action surface of the region belongs to torsional deformation and whether the torsional deformation exceeds the maximum tolerable deformation of the region. If so, it is determined that the region belongs to the pressure abnormal region.

[0121] The structural defect identification module collects an image of the pressure abnormal region, analyzes the image, and obtains structural defect existence information of the pressure abnormal region, including:

[0122] A binocular image of the surface of the pressure abnormal region is collected to generate a three-dimensional image of the surface of the pressure abnormal region. The three-dimensional image is analyzed to obtain the number, distribution area, distribution density, and average depth of structural cracks on the surface of the pressure abnormal region, which are used as the structural defect existence information.

[0123] The beneficial effects of the above embodiments are that, based on the deformation direction and deformation amplitude of the pressure-acting surface of the stereoscopic area, it is determined whether the current deformation of the stereoscopic area belongs to a distortion deformation (i.e., whether the distortion angle of the deformation exceeds a preset angle threshold in the three-dimensional space), and it is further determined whether the deformation amplitude of the distortion deformation exceeds the maximum tolerable deformation amplitude of the stereoscopic area itself. If both of the above two conditions are met, it is determined that the stereoscopic area belongs to the compression abnormal area. At this time, the compression abnormal area of the concrete structure is photographed by corresponding binoculars to obtain a three-dimensional image of the compression abnormal area, and the three-dimensional image is subjected to structural crack identification to obtain the number, distribution area, distribution density, and average depth of the structural cracks existing on the surface of the compression abnormal area, so as to quantitatively calibrate the existence state of the structural cracks in the compression abnormal area.

[0124] In another embodiment, the structural defect deterioration trend identification module determines whether the compression abnormal area has a structural defect deterioration trend based on the structural defect existence information and environmental information corresponding to the location of the compression abnormal area, including:

[0125] Based on the structural defect existence information and wind speed / wind direction information corresponding to the location of the compression abnormal area, it is determined whether the structural cracks on the surface of the compression abnormal area have a trend of increasing in number, area, distribution density, or average depth. If so, it indicates that the compression abnormal area has a structural defect deterioration trend;

[0126] The alarm notification module determines whether the entire concrete structure will have a collapse event based on the internal stress information of the compression abnormal area having a structural defect deterioration trend, and performs corresponding alarm notification operations, including:

[0127] Based on the pressure field distribution information corresponding to the compression abnormal area having a structural defect deterioration trend and the structural defect morphology information of the compression abnormal area having a structural defect deterioration trend, the internal stress information of the compression abnormal area having a structural defect deterioration trend is obtained;

[0128] Based on the internal stress information, it is determined whether the compression abnormal area having a structural defect deterioration trend is in an internal stress overload state. If so, it is determined whether the entire concrete structure will have a collapse event, and corresponding alarm notification operations are performed.

[0129] The beneficial effects of the above embodiment are that the concrete structure will have corresponding weathering under the action of wind, and the more structural cracks the concrete structure has, the more intensive the distribution and the greater the crack depth, the further the weathering progress will be aggravated, so that the structural cracks will continuously expand, and even the surface layer of the concrete structure will peel off. Therefore, the weathering effect simulation of the abnormal pressure area is performed in combination with the number of structural cracks on the surface of the abnormal pressure area, the structural crack distribution area, the structural crack distribution density, the average depth of the structural cracks, and the wind speed / wind direction information corresponding to the position of the abnormal pressure area, to determine whether the structural cracks on the surface of the abnormal pressure area have a trend of increasing in number, area, distribution density, or average depth, so as to accurately identify the deterioration trend of the structural defects of the abnormal pressure area in real time. In addition, based on the pressure field distribution information of the abnormal pressure area with a deterioration trend of structural defects and the structural defect morphology information of the abnormal pressure area with a deterioration trend of structural defects, internal stress simulation is performed on the abnormal pressure area with a deterioration trend of structural defects to obtain corresponding internal stress information (i.e., internal stress size and distribution direction). Then, the internal stress information is compared with the internal stress load limit of the abnormal pressure area with a deterioration trend of structural defects to determine whether the abnormal pressure area with a deterioration trend of structural defects is in an internal stress overload state, and an alarm notification operation in the form of corresponding message broadcast sending is performed when the abnormal pressure area with a deterioration trend of structural defects is in an internal stress overload state.

[0130] In general, the method and system for concrete structure health monitoring based on a distributed piezoelectric ceramic sensor utilize the distributed piezoelectric ceramic sensor to detect the pressure data received by the concrete structure, to obtain the corresponding pressure field distribution information of the concrete structure, and to vectorize the stress condition of the concrete structure; based on the pressure field distribution information, the pressure deformation trend of all regions subordinate to the concrete structure is obtained to identify the abnormal pressure area, to realize the regional calibration of the concrete structure, to visually identify the abnormal pressure area to obtain the structural defect information, and to determine whether there is a deterioration trend of structural defects in combination with the environmental information, to effectively predict the change of structural defects of the concrete structure; based on the internal stress information of the concrete structure, accurate judgment of whether the concrete structure collapses is performed, and an alarm notification operation is performed, so as to realize long-time continuous and comprehensive monitoring of the concrete structure, and to improve the real-time performance and reliability of the concrete structure health monitoring.

[0131] 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 method for monitoring the health of a concrete structure based on distributed piezoelectric ceramic sensors, characterized in that, The method comprises the following steps: Step S1, collecting pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure, and analyzing the pressure data to obtain pressure field distribution information of the concrete structure as a whole under external force; Step S2, determining the pressure deformation trend of all regions of the concrete structure based on the pressure field distribution information; Step S3, determining the existence of an abnormal pressure region of the concrete structure based on the pressure deformation trend; Step S4, collecting images of the abnormal pressure region, and analyzing the images to obtain information on the existence of structural defects in the abnormal pressure region; Step S5, determining whether the abnormal pressure region has a structural defect deterioration trend based on the information on the existence of structural defects and environmental information corresponding to the location of the abnormal pressure region, specifically comprising: Step S51, using the following formula (1) to obtain the integrated vertical wind speed value on the surface of the abnormal pressure region according to the information on the existence of structural defects, wind speed / wind direction information corresponding to the location of the abnormal pressure region, and the normal vector of the surface of the abnormal pressure region, （1） In the above formula (1), represents the integrated vertical wind speed value on the surface of the abnormal pressure region; represents the wind speed value of the first wind direction on the surface of the abnormal pressure region; represents the direction vector of the first wind direction on the surface of the abnormal pressure region; represents the normal vector of the abnormal pressure region surface; represents the modulo operation; represents the total number of wind directions on the surface of the abnormal pressure region; Step S52, using the following formula (2) to obtain the weight value of each wind direction according to the information on the existence of structural defects, wind speed / wind direction information corresponding to the location of the abnormal pressure region, and the normal vector of the surface of the abnormal pressure region, （2） In the above equation (2), represents the weight value of the wind direction of the abnormal pressure region surface; represents a positive number selection function, and if the value in the parentheses is a positive number, the function value of the positive number selection function is the value in the parentheses, and if the value in the parentheses is a non-positive number, the function value of the positive number selection function is 0.​ Step S53, using the following formula (3) to determine whether the structural cracks on the surface of the abnormal pressure region have a trend of increasing in number, area, distribution density, or average depth according to the weight value of each wind direction, the wind speed value of each wind direction, and the integrated vertical wind speed value on the surface of the abnormal pressure region, （3） In the above formula (3), represents a determination value indicating whether the number of the structural cracks present in the abnormal compression region surface increases, the area of the structural cracks present in the abnormal compression region surface increases, the distribution density of the structural cracks present in the abnormal compression region surface increases, or the average depth of the structural cracks present in the abnormal compression region surface increases. If , it indicates that the number of structural cracks on the surface of the abnormal compression region increases, the area increases, the distribution density increases, or the average depth increases. If indicates that the structural cracks on the surface of the abnormal compression region do not have a tendency of increasing in number, area, distribution density, or average depth. Step S6, determining whether the concrete structure as a whole will have a collapse event based on the internal stress information of the abnormal pressure region with a structural defect deterioration trend, and performing corresponding alarm notification operations.

2. The concrete structure health monitoring method based on a distributed piezoelectric ceramic sensor according to claim 1, wherein: Step S1 comprises: Collecting pressure data generated by all piezoelectric ceramic sensor units included in the distributed piezoelectric ceramic sensor installed on the concrete structure; Converting the pressure data into corresponding pressure vectors based on the installation position and installation posture of the pressure ceramic sensor units on the concrete structure; Generating pressure field distribution information of the concrete structure as a whole under external force based on the pressure vectors corresponding to all pressure ceramic sensor units; Step S2 comprises: Extracting surface pressure distribution information of each region of the concrete structure from the pressure field distribution information; determining the pressure deformation trend of the region based on the surface pressure distribution information and the shape and size of the pressure-acting surface of the region; wherein the pressure deformation trend includes the deformation direction and deformation amplitude of the pressure-acting surface of the region under surface pressure.

3. The concrete structure health monitoring method based on a distributed piezoelectric ceramic sensor according to claim 1, wherein: Step S3 comprises: determining whether the deformation of the pressure-acting surface of the region currently occurring is torsional deformation and whether the torsional deformation exceeds the maximum tolerable deformation of the region based on the pressure deformation trend including the deformation direction and deformation amplitude of the pressure-acting surface of the region under surface pressure; Step 4 comprises: collecting binocular images of the surface of the pressure-abnormal region to generate a three-dimensional image of the surface of the pressure-abnormal region; and analyzing the three-dimensional image to obtain the number, distribution area, distribution density and average depth of structural cracks on the surface of the pressure-abnormal region as the structural defect existence information.

4. The concrete structure health monitoring method based on the distributed piezoelectric ceramic sensor according to claim 1, characterized in that: Step S5 comprises: determining whether the number, distribution area, distribution density or average depth of structural cracks on the surface of the pressure-abnormal region has a trend of increasing based on the structural defect existence information and the wind speed / wind direction information corresponding to the location of the pressure-abnormal region; and if so, indicating that the pressure-abnormal region has a structural defect deterioration trend; Step S6 comprises: obtaining internal stress information of the pressure-abnormal region having the structural defect deterioration trend based on the pressure field distribution information corresponding to the pressure-abnormal region having the structural defect deterioration trend and the structural defect morphology information of the pressure-abnormal region having the structural defect deterioration trend; determining whether the pressure-abnormal region having the structural defect deterioration trend is in an internal stress overload state based on the internal stress information; and if so, determining whether the whole concrete structure will have a collapse event, and accordingly performing an alarm notification operation.

5. A distributed piezoelectric ceramic sensor based concrete structure health monitoring system, characterized by, comprises: a pressure field determination module configured to collect pressure data generated by the distributed piezoelectric ceramic sensor installed on the concrete structure, analyze the pressure data, and obtain pressure field distribution information of the whole concrete structure under external force; a deformation trend determination module configured to determine pressure deformation trends of all regions of the concrete structure based on the pressure field distribution information; an abnormal region determination module configured to determine a pressure-abnormal region of the concrete structure based on the pressure deformation trends; a structural defect identification module configured to collect images of the pressure-abnormal region, analyze the images, and obtain structural defect existence information of the pressure-abnormal region; a structural defect deterioration trend identification module configured to determine whether the pressure-abnormal region has a structural defect deterioration trend based on the structural defect existence information and environmental information corresponding to the location of the pressure-abnormal region, and specifically comprising: Step S51, obtaining a comprehensive vertical wind speed value on the surface of the pressure-abnormal region by using the following formula (1) based on the structural defect existence information, the wind speed / wind direction information corresponding to the location of the pressure-abnormal region and the normal vector of the surface of the pressure-abnormal region, （1） In the above formula (1), represents the integrated vertical wind speed value on the surface of the abnormal pressure region; represents the wind speed value of the first wind direction on the surface of the abnormal pressure region; represents the direction vector of the first wind direction on the surface of the abnormal pressure region; represents the normal vector of the abnormal pressure region surface; represents the modulo operation; represents the total number of wind directions on the surface of the abnormal pressure region; Step S52, using the following formula (2), according to the structural defect existence information, the wind speed / wind direction information corresponding to the position of the abnormal pressure area, and the normal vector of the surface of the abnormal pressure area, the weight value of each wind direction is obtained, （2） In the above equation (2), represents the weight value of the first wind direction on the surface of the abnormal pressure region; represents a positive number selection function, and if the value in the parentheses is a positive number, the function value of the positive number selection function is the value in the parentheses, and if the value in the parentheses is a non-positive number, the function value of the positive number selection function is 0.​ Step S53, using the following formula (3), according to the weight value of each wind direction, the wind speed value of each wind direction, and the comprehensive vertical wind speed value on the surface of the abnormal pressure area, it is judged whether the structural crack of the surface of the abnormal pressure area has the trend of increasing in number, increasing in area, increasing in distribution density, or increasing in average depth, （3） In the above formula (3), represents a determination value indicating whether the structural cracks of the abnormal compression region surface have a tendency of increasing in number, area, distribution density, or average depth. If , it indicates that the number of structural cracks on the surface of the abnormal compression region increases, the area increases, the distribution density increases, or the average depth increases. If indicates that the structural cracks on the surface of the abnormal compression region do not have a tendency to increase in number, area, distribution density, or average depth. The alarm notification module judges whether the whole concrete structure will collapse based on the internal stress information of the abnormal pressure area with the deterioration trend of the structural defect, and performs corresponding alarm notification operation.

6. The concrete structure health monitoring system based on distributed piezoelectric ceramic sensors according to claim 5, characterized in that: The stress field determination module collects the stress data generated by the distributed piezoelectric ceramic sensors installed on the concrete structure, analyzes the stress data, and obtains the stress field distribution information of the whole concrete structure under external force, including: Based on the stress deformation trend including the deformation direction and deformation amplitude of the stress action surface of the region under surface stress, it is judged whether the current deformation of the stress action surface of the region belongs to torsional deformation, and whether the torsional deformation exceeds the maximum tolerable deformation of the region; if so, it is determined that the region belongs to an abnormal pressure area; The deformation trend determination module determines the stress deformation trend of all regions subordinate to the concrete structure based on the stress field distribution information, including: The surface stress distribution information of each region subordinate to the concrete structure is extracted from the stress field distribution information; based on the surface stress distribution information and the shape and size of the stress action surface of the region, the stress deformation trend of the region is determined; wherein the stress deformation trend includes the deformation direction and deformation amplitude of the stress action surface of the region under surface stress.

7. The concrete structure health monitoring system based on distributed piezoelectric ceramic sensors according to claim 5, characterized in that: The abnormal area determination module determines the abnormal pressure area existing in the concrete structure based on the stress deformation trend, including: Based on the stress deformation trend including the deformation direction and deformation amplitude of the stress action surface of the region under surface stress, it is judged whether the current deformation of the stress action surface of the region belongs to torsional deformation, and whether the torsional deformation exceeds the maximum tolerable deformation of the region; if so, it is determined that the region belongs to an abnormal pressure area; The structural defect identification module collects the image of the abnormal pressure area, analyzes the image, and obtains the structural defect existence information of the abnormal pressure area, including: The binocular image of the surface of the abnormal compression area is collected to generate a three-dimensional image of the surface of the abnormal compression area; the three-dimensional image is analyzed to obtain the number of structural cracks, the distribution area of structural cracks, the distribution density of structural cracks, and the average depth of structural cracks on the surface of the abnormal compression area, which are used as the structural defect existence information.

8. The concrete structure health monitoring system based on distributed piezoelectric ceramic sensors according to claim 5, characterized in that: The structural defect deterioration trend identification module determines whether the abnormal compression area has a structural defect deterioration trend based on the structural defect existence information and environmental information corresponding to the location of the abnormal compression area, including: Based on the structural defect existence information and wind speed / wind direction information corresponding to the location of the abnormal compression area, it is determined whether the structural cracks on the surface of the abnormal compression area have a trend of increasing in number, area, distribution density, or average depth; if so, it indicates that the abnormal compression area has a structural defect deterioration trend; The alarm notification module determines whether the entire concrete structure will have a collapse event based on the internal stress information of the abnormal compression area with a structural defect deterioration trend, and performs corresponding alarm notification operations, including: Based on the pressure field distribution information corresponding to the abnormal compression area with a structural defect deterioration trend and the structural defect morphology information of the abnormal compression area with a structural defect deterioration trend, the internal stress information of the abnormal compression area with a structural defect deterioration trend is obtained; Based on the internal stress information, it is determined whether the abnormal compression area with a structural defect deterioration trend is in an internal stress overload state; if so, it is determined whether the entire concrete structure will have a collapse event, and corresponding alarm notification operations are performed.

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