CN117191696A - Concrete structure health monitoring method and system based on distributed piezoelectric ceramic sensor - Google Patents

Abstract

The invention provides a concrete structure health monitoring method and system based on a distributed piezoelectric ceramic sensor, which utilizes the distributed piezoelectric ceramic sensor to detect pressure data received by a concrete structure, so as to obtain pressure field distribution information corresponding to the concrete structure, and vectorize and calibrate the stress condition of the concrete structure; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

Description

Concrete structure health monitoring method and system based on distributed piezoelectric ceramic sensor

Technical Field

The invention relates to the field of civil construction monitoring, in particular to a concrete structure health monitoring method and system based on a distributed piezoelectric ceramic sensor.

Background

The building structures such as bridge piers or tunnel arch surfaces are formed by pouring concrete, the corresponding concrete structure can be deformed under the action of external force, and when the deformation is positioned in a self-bearable range of the concrete structure, the hidden danger of the structure cannot be brought to the concrete structure. However, the concrete structure is affected by vibration pressure or weathering and other effects generated by running of the automobile in the long-term use process, so that structural defects such as cracks and the like can be inevitably generated, and the structural defects of the concrete structure can be continuously deteriorated along with the daily accumulation of the structural defects, so that the concrete structure has great potential safety hazard. In order to ensure the structural safety of the concrete structure, the concrete structure needs to be subjected to health monitoring, and at present, the concrete structure can be subjected to periodic manual investigation, but the structural defects of the concrete structure in a long time cannot be continuously and comprehensively monitored in the mode, so that the health monitoring timeliness and reliability of the concrete structure are reduced.

Disclosure of Invention

The invention aims to provide a concrete structure health monitoring method and system based on a distributed piezoelectric ceramic sensor, which utilize the distributed piezoelectric ceramic sensor to detect pressure data received by a concrete structure so as to obtain pressure field distribution information corresponding to the concrete structure, and vectorize and calibrate the stress condition of the concrete structure; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

The invention is realized by the following technical scheme:

a concrete structure health monitoring method based on a distributed piezoelectric ceramic sensor comprises the following steps:

Collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on a concrete structure, and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

determining a compression abnormal region existing in the concrete structure based on the pressure deformation trend;

acquiring an image of the pressed abnormal region, and analyzing the image to obtain structural defect existence information of the pressed abnormal region;

judging whether the pressed abnormal region has a structural defect deterioration trend or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out alarm notification operation.

Optionally, collecting pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure, analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, including:

Collecting pressure data generated by all piezoelectric ceramic sensing units contained in the distributed piezoelectric ceramic sensor arranged on the concrete structure;

based on the installation position and the installation posture of the pressure ceramic sensing unit on the concrete structure, converting the pressure data into corresponding pressure vectors;

generating pressure field distribution information formed by the whole concrete structure under the action of external force based on pressure vectors corresponding to all the pressure ceramic sensing units;

based on the pressure field distribution information, determining the pressure deformation trend of all areas under the concrete structure, including:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

Optionally, determining the abnormal compression area of the concrete structure based on the pressure deformation trend includes:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

Collecting the image of the pressed abnormal region, analyzing the image to obtain the structural defect existence information of the pressed abnormal region, and comprising the following steps:

acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

Optionally, based on the structural defect existence information and the environmental information corresponding to the position of the pressed abnormal region, determining whether the pressed abnormal region has a structural defect degradation trend includes:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, so as to perform corresponding alarm notification operation, and the method comprises the following steps:

Obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.

Optionally, based on the structural defect existence information and wind speed/wind direction information corresponding to the position of the pressure abnormal region, judging whether the number of structural cracks on the surface of the pressure abnormal region increases, the area increases, the distribution density increases or the average depth increases trend, including:

step S1, obtaining a comprehensive vertical wind speed value on the surface of the pressure-bearing abnormal region according to the wind speed/wind direction information corresponding to the position of the pressure-bearing abnormal region and the normal vector of the surface of the pressure-bearing abnormal region by using the following formula (1),

In the above-mentioned formula (1),representing a composite vertical wind speed value over the surface of the stress anomaly region; v (a) represents a wind speed value of an a-th wind direction on the surface of the pressure-receiving abnormal region; />A direction vector representing an a-th wind direction on the surface of the pressure abnormal region; />A normal vector representing the surface of the pressure-receiving abnormal region; the || represents modulo; p represents the total number of wind directions received on the surface of the abnormal pressure area;

step S2, obtaining a weight value of each wind direction according to the wind speed/wind direction information corresponding to the position of the abnormal pressed region and the normal vector of the surface of the abnormal pressed region by using the following formula (2),

in the above formula (2), G (a) represents a weight value of an a-th wind direction on the surface of the pressure-receiving abnormal region; f </u > represents a positive number selection function, wherein if the value in the bracket is a positive number, the function value of the positive number selection function is the value in the bracket, and if the value in the bracket is a non-positive number, the function value of the positive number selection function is 0;

step S3, judging whether the number of structural cracks on the surface of the abnormal pressed area is increased, the distribution density is increased or the average depth is increased or not according to the weight value of each wind direction and the comprehensive vertical wind speed value on the surface of the abnormal pressed area by using the following formula (3),

In the above formula (3), E represents a determination value for determining whether or not there is a tendency of an increase in the number, an increase in the area, an increase in the distribution density, or an increase in the average depth of the structural cracks on the surface of the pressure-receiving abnormal region;

if e=1, the number of structural cracks on the surface of the abnormal pressed region tends to increase, the area increases, the distribution density increases, or the average depth increases;

if e=0, the structural cracks on the surface of the pressure-receiving abnormal region do not have a tendency to increase in number, area, distribution density, or average depth.

The invention also provides a concrete structure health monitoring system based on the distributed piezoelectric ceramic sensor, which comprises:

the pressure field determining module is used for collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on the concrete structure and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

the deformation trend determining module is used for determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

the abnormal region determining module is used for determining a pressed abnormal region of the concrete structure based on the pressure deformation trend;

The structural defect identification module is used for acquiring images of the pressed abnormal region and analyzing the images to obtain structural defect existence information of the pressed abnormal region;

the structural defect deterioration trend identification module is used for judging whether the structural defect deterioration trend exists in the pressed abnormal region or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

and the alarm notification module is used for judging whether the whole concrete structure is subjected to a collapse event or not based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation.

Optionally, the pressure field determining module collects pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure, analyzes the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, and includes:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

The deformation trend determining module determines the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information, and comprises the following steps:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

Optionally, the abnormal region determining module determines, based on the pressure deformation trend, a pressed abnormal region existing in the concrete structure, including:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

the structural defect identification module acquires the image of the pressed abnormal region, analyzes the image to obtain the structural defect existence information of the pressed abnormal region, and comprises the following steps:

Acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

Optionally, the structural defect degradation trend identifying module determines whether the structural defect degradation trend exists in the pressed abnormal area based on the structural defect existence information and the environmental information corresponding to the position of the pressed abnormal area, including:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

the alarm notification module judges whether the whole concrete structure can generate a collapse event based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation, and the alarm notification module comprises the following steps:

Obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.

Compared with the prior art, the application has the following beneficial effects:

the application provides a concrete structure health monitoring method and system based on a distributed piezoelectric ceramic sensor, which utilize the distributed piezoelectric ceramic sensor to detect pressure data received by a concrete structure, so as to obtain pressure field distribution information corresponding to the concrete structure, and vectorize and calibrate the stress condition of the concrete structure; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic flow chart of a concrete structure health monitoring method based on a distributed piezoelectric ceramic sensor.

Fig. 2 is a schematic structural diagram of a health monitoring system for a concrete structure according to the present application.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1, a method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor according to an embodiment of the present application includes:

collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on a concrete structure, and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

Determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

determining a compression abnormal region existing in the concrete structure based on the pressure deformation trend;

acquiring an image of the pressed abnormal region, and analyzing the image to obtain structural defect existence information of the pressed abnormal region;

judging whether the pressed abnormal region has a structural defect deterioration trend or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out alarm notification operation.

The method for monitoring the health of the concrete structure based on the distributed piezoelectric ceramic sensor has the beneficial effects that the distributed piezoelectric ceramic sensor is utilized to detect pressure data received by the concrete structure, so that pressure field distribution information corresponding to the concrete structure is obtained, and the stress condition of the concrete structure is vectorized and calibrated; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

In another embodiment, collecting pressure data generated by a distributed piezoelectric ceramic sensor mounted on a concrete structure, and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, including:

collecting pressure data generated by all piezoelectric ceramic sensing units contained in the distributed piezoelectric ceramic sensor arranged on the concrete structure;

based on the installation position and the installation posture of the pressure ceramic sensing unit on the concrete structure, converting the pressure data into corresponding pressure vectors;

generating pressure field distribution information formed by the whole concrete structure under the action of external force based on pressure vectors corresponding to all the pressure ceramic sensing units;

based on the pressure field distribution information, determining the pressure deformation trend of all areas under the concrete structure, including:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

The beneficial effects of the embodiment are that the piezoelectric ceramic sensing units are respectively arranged at a plurality of different positions on the outer surface and the inner surface of the concrete structure such as the bridge pier or the tunnel arch surface, so that the piezoelectric ceramic sensing units form a distributed piezoelectric ceramic sensor together, each piezoelectric ceramic sensing unit can independently detect the pressure data of the position where the piezoelectric ceramic sensing unit is located, and the distributed piezoelectric ceramic sensor can perform multi-point synchronous pressure detection on the concrete structure, and obtain the pressure data of the 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 azimuth direction, pressure data obtained by detection of the piezoelectric ceramic sensing units are subjected to vector conversion according to installation position coordinates and installation postures (such as installation pitch angle, installation deflection angle and the like) of the piezoelectric ceramic sensing units in the concrete structure to obtain corresponding pressure vectors, and then the pressure vectors corresponding to all the piezoelectric ceramic sensing units are combined to construct pressure field distribution information which is formed under the action of external force and related to the whole concrete structure, so that vectorization characterization is carried out on the pressure stress condition of the whole concrete structure. In addition, the concrete structure can be divided into a plurality of three-dimensional areas, and the boundary of each three-dimensional area is taken as a reference to extract the surface pressure distribution information of each three-dimensional area from the pressure field distribution information, wherein the surface pressure distribution information can be, but is not limited to, the pressure magnitude and the pressure direction of the pressure acting surface of each three-dimensional area correspondingly received in the pressure field distribution information. And determining the deformation direction and deformation trend of the three-dimensional region under the action of pressure according to the surface pressure distribution information and the shape and the area of the pressure acting surface of the three-dimensional region, thereby carrying out regional determination on the deformation condition of the concrete structure caused by the pressure.

In another embodiment, determining the existence of a stress anomaly area of the concrete structure based on the pressure deformation trend includes:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

collecting the image of the pressed abnormal region, analyzing the image to obtain the structural defect existence information of the pressed abnormal region, and comprising the following steps:

acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

The beneficial effects of the embodiment are that, with the deformation direction and deformation amplitude of the pressure acting surface of the three-dimensional area as references, whether the deformation of the three-dimensional area currently belongs to distortion deformation (namely, whether the distortion angle of the deformation exceeds a preset angle threshold value in three-dimensional space) is judged, whether the deformation amplitude of the distortion deformation exceeds the maximum bearable deformation amplitude of the three-dimensional area per se is further judged, and if the two conditions are met, the three-dimensional area is determined to belong to a pressed abnormal area. At the moment, corresponding binocular shooting is carried out on the compression abnormal region of the concrete structure to obtain a three-dimensional image related to the compression abnormal region, and then the three-dimensional image is subjected to recognition of structural cracks to obtain the number of the structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth existing on the surface of the compression abnormal region, so that the existence state of the structural cracks of the compression abnormal region is quantitatively calibrated.

In another embodiment, based on the structural defect existence information and the environmental information corresponding to the location of the pressed abnormal region, determining whether the pressed abnormal region has a structural defect deterioration trend includes:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, so as to perform corresponding alarm notification operation, and the method comprises the following steps:

obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.

The beneficial effects of the embodiment are that the corresponding weathering condition of the concrete structure can occur under the action of wind force, when the concrete structure has more structural cracks, the more densely distributed and the greater the crack depth, the weathering progress can be further aggravated, the structural cracks are continuously expanded, and even the situation that the surface layer of the concrete structure is peeled occurs. Therefore, the weathering simulation is carried out on the pressure-bearing abnormal region by combining the number of structural cracks, the structural crack distribution area, the structural crack distribution density, the structural crack average depth and the wind speed/wind direction information corresponding to the position of the pressure-bearing abnormal region, and whether the number, the area, the distribution density or the average depth of the structural cracks on the surface of the pressure-bearing abnormal region are increased is judged, so that the structural defect deterioration trend of the pressure-bearing abnormal region is accurately identified in real time. And carrying out internal stress simulation on the pressed abnormal region with the structural defect deterioration trend based on the pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and the structural defect form information of the pressed abnormal region with the structural defect deterioration trend, so as to obtain corresponding internal stress information (namely the internal stress magnitude and the distribution direction). And comparing the internal stress information with the internal stress load limit of the pressed abnormal region with the structural defect deterioration trend, judging whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state, and carrying out alarm notification operation of a corresponding message broadcasting transmission mode under the internal stress overload state.

In another embodiment, based on the structural defect existence information and wind speed/direction information corresponding to the position of the pressed abnormal region, determining whether there is a trend of increasing the number, the area, the distribution density or the average depth of the structural cracks on the surface of the pressed abnormal region includes:

step S1, obtaining the comprehensive vertical wind speed value on the surface of the pressed abnormal region according to the wind speed/wind direction information corresponding to the position of the pressed abnormal region and the normal vector of the surface of the pressed abnormal region by using the following formula (1) according to the existence information of the structural defect,

in the above-mentioned formula (1),representing the integrated vertical wind speed value on the surface of the stress anomaly region; v (a) represents a wind speed value of an a-th wind direction on the surface of the pressure-receiving abnormal region; />A direction vector indicating an a-th wind direction on the surface of the pressure abnormal region; />A normal vector representing the surface of the pressed abnormal region; the || represents modulo; p represents the total number of wind directions received on the surface of the abnormal pressure area;

step S2, obtaining the weight value of each wind direction according to the wind speed/wind direction information corresponding to the position of the pressed abnormal region and the normal vector of the surface of the pressed abnormal region by using the following formula (2) according to the existence information of the structural defect,

In the above formula (2), G (a) represents a weight value of the a-th wind direction on the surface of the pressure-receiving abnormal region; f </u > represents a positive number selection function, wherein if the value in the bracket is a positive number, the function value of the positive number selection function is the value in the bracket, and if the value in the bracket is a non-positive number, the function value of the positive number selection function is 0;

step S3, judging whether the number of structural cracks on the surface of the abnormal pressed area is increased, the distribution density is increased or the average depth is increased according to the weight value of each wind direction and the comprehensive vertical wind speed value on the surface of the abnormal pressed area by using the following formula (3),

in the above formula (3), E represents a determination value for determining whether or not there is a tendency of an increase in the number, an increase in the area, an increase in the distribution density, or an increase in the average depth of the structural cracks on the surface of the pressure-receiving abnormal region;

if e=1, the number of structural cracks on the surface of the pressure-receiving abnormal region tends to increase, the area increases, the distribution density increases, or the average depth increases;

if e=0, the number of structural cracks on the surface of the pressure-receiving abnormal region tends not to increase, the area increases, the distribution density increases, or the average depth increases.

The beneficial effects of the embodiment are that by utilizing the formula (1), according to the existence information of the structural defect, the wind speed/wind direction information corresponding to the position of the abnormal pressed region and the normal vector of the surface of the abnormal pressed region, the comprehensive vertical wind speed value on the surface of the abnormal pressed region is obtained, so that the overall windward condition is known, and the subsequent overall analysis of the surface of the abnormal pressed region is facilitated; according to the structural defect existence information, the wind speed/wind direction information corresponding to the position of the pressed abnormal region and the normal vector of the surface of the pressed abnormal region are utilized to obtain the weight value of each wind direction, so that independent analysis of each wind direction is carried out, and the aim of targeted research and calculation of each wind direction is achieved, and the accuracy of system judgment is ensured; and finally, judging whether the number of structural cracks on the surface of the pressed abnormal area is increased, the distribution density is increased or the average depth is increased 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 pressed abnormal area by utilizing the formula (3), and further, carrying out accurate judgment through comprehensive analysis on the state of the whole wind direction and the state of the independent wind direction, thereby ensuring the reliability of the system.

Referring to fig. 2, a health monitoring system for a concrete structure according to an embodiment of the application includes:

the pressure field determining module is used for collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on the concrete structure and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

the deformation trend determining module is used for determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

the abnormal region determining module is used for determining a pressed abnormal region of the concrete structure based on the pressure deformation trend;

the structural defect identification module is used for acquiring images of the pressed abnormal region and analyzing the images to obtain structural defect existence information of the pressed abnormal region;

the structural defect deterioration trend identification module is used for judging whether the structural defect deterioration trend exists in the pressed abnormal region or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

and the alarm notification module is used for judging whether the whole concrete structure is subjected to a collapse event or not based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation.

The health monitoring system for the concrete structure has the beneficial effects that the distributed piezoelectric ceramic sensor is utilized to detect pressure data received by the concrete structure, so that pressure field distribution information corresponding to the concrete structure is obtained, and vectorization calibration is carried out on the stress condition of the concrete structure; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

In another embodiment, the pressure field determining module collects pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure, analyzes the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, and includes:

Judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

the deformation trend determining module determines the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information, and comprises the following steps:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

The beneficial effects of the embodiment are that the piezoelectric ceramic sensing units are respectively arranged at a plurality of different positions on the outer surface and the inner surface of the concrete structure such as the bridge pier or the tunnel arch surface, so that the piezoelectric ceramic sensing units form a distributed piezoelectric ceramic sensor together, each piezoelectric ceramic sensing unit can independently detect the pressure data of the position where the piezoelectric ceramic sensing unit is located, and the distributed piezoelectric ceramic sensor can perform multi-point synchronous pressure detection on the concrete structure, and obtain the pressure data of the 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 azimuth direction, pressure data obtained by detection of the piezoelectric ceramic sensing units are subjected to vector conversion according to installation position coordinates and installation postures (such as installation pitch angle, installation deflection angle and the like) of the piezoelectric ceramic sensing units in the concrete structure to obtain corresponding pressure vectors, and then the pressure vectors corresponding to all the piezoelectric ceramic sensing units are combined to construct pressure field distribution information which is formed under the action of external force and related to the whole concrete structure, so that vectorization characterization is carried out on the pressure stress condition of the whole concrete structure. In addition, the concrete structure can be divided into a plurality of three-dimensional areas, and the boundary of each three-dimensional area is taken as a reference to extract the surface pressure distribution information of each three-dimensional area from the pressure field distribution information, wherein the surface pressure distribution information can be, but is not limited to, the pressure magnitude and the pressure direction of the pressure acting surface of each three-dimensional area correspondingly received in the pressure field distribution information. And determining the deformation direction and deformation trend of the three-dimensional region under the action of pressure according to the surface pressure distribution information and the shape and the area of the pressure acting surface of the three-dimensional region, thereby carrying out regional determination on the deformation condition of the concrete structure caused by the pressure.

In another embodiment, the abnormal region determining module determines a pressed abnormal region existing in the concrete structure based on the pressure deformation trend, including:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

the structural defect identification module acquires the image of the pressed abnormal region, analyzes the image to obtain the structural defect existence information of the pressed abnormal region, and comprises the following steps:

acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

The beneficial effects of the embodiment are that, with the deformation direction and deformation amplitude of the pressure acting surface of the three-dimensional area as references, whether the deformation of the three-dimensional area currently belongs to distortion deformation (namely, whether the distortion angle of the deformation exceeds a preset angle threshold value in three-dimensional space) is judged, whether the deformation amplitude of the distortion deformation exceeds the maximum bearable deformation amplitude of the three-dimensional area per se is further judged, and if the two conditions are met, the three-dimensional area is determined to belong to a pressed abnormal area. At the moment, corresponding binocular shooting is carried out on the compression abnormal region of the concrete structure to obtain a three-dimensional image related to the compression abnormal region, and then the three-dimensional image is subjected to recognition of structural cracks to obtain the number of the structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth existing on the surface of the compression abnormal region, so that the existence state of the structural cracks of the compression abnormal region is quantitatively calibrated.

In another embodiment, the structural defect degradation trend identifying module determines whether the structural defect degradation trend exists in the pressed abnormal region based on the structural defect existence information and the environmental information corresponding to the position of the pressed abnormal region, including:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

the alarm notification module judges whether the whole concrete structure can generate a collapse event based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation, and the alarm notification module comprises the following steps:

obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

Based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.

The beneficial effects of the embodiment are that the corresponding weathering condition of the concrete structure can occur under the action of wind force, when the concrete structure has more structural cracks, the more densely distributed and the greater the crack depth, the weathering progress can be further aggravated, the structural cracks are continuously expanded, and even the situation that the surface layer of the concrete structure is peeled occurs. Therefore, the weathering simulation is carried out on the pressure-bearing abnormal region by combining the number of structural cracks, the structural crack distribution area, the structural crack distribution density, the structural crack average depth and the wind speed/wind direction information corresponding to the position of the pressure-bearing abnormal region, and whether the number, the area, the distribution density or the average depth of the structural cracks on the surface of the pressure-bearing abnormal region are increased is judged, so that the structural defect deterioration trend of the pressure-bearing abnormal region is accurately identified in real time. And carrying out internal stress simulation on the pressed abnormal region with the structural defect deterioration trend based on the pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and the structural defect form information of the pressed abnormal region with the structural defect deterioration trend, so as to obtain corresponding internal stress information (namely the internal stress magnitude and the distribution direction). And comparing the internal stress information with the internal stress load limit of the pressed abnormal region with the structural defect deterioration trend, judging whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state, and carrying out alarm notification operation of a corresponding message broadcasting transmission mode under the internal stress overload state.

In general, the method and the system for monitoring the health of the concrete structure based on the distributed piezoelectric ceramic sensor utilize the distributed piezoelectric ceramic sensor to detect the pressure data received by the concrete structure, so as to obtain the pressure field distribution information corresponding to the concrete structure, and vectorize and calibrate the stress condition of the concrete structure; based on the pressure field distribution information, obtaining the pressure deformation trend of all areas under the concrete structure, identifying the pressed abnormal areas in the pressure deformation trend, realizing the regional calibration of the concrete structure, visually identifying the pressed abnormal areas to obtain structural defect existence information, judging whether structural defect deterioration trend exists or not by combining the environmental information, and effectively predicting the structural defect change of the concrete structure; based on the internal stress information of the concrete structure, the collapse is accurately judged, and alarm notification operation is carried out, so that the concrete structure is continuously and comprehensively monitored for a long time, and the real-time performance and the reliability of the concrete structure health monitoring are improved.

The foregoing is merely one specific embodiment of the invention, and any modifications made in light of the above teachings are intended to fall within the scope of the invention.

Claims (9)

1. A concrete structure health monitoring method based on a distributed piezoelectric ceramic sensor is characterized by comprising the following steps:

collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on a concrete structure, and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

determining a compression abnormal region existing in the concrete structure based on the pressure deformation trend; acquiring an image of the pressed abnormal region, and analyzing the image to obtain structural defect existence information of the pressed abnormal region;

judging whether the pressed abnormal region has a structural defect deterioration trend or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out alarm notification operation.

2. The method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor according to claim 1, wherein the method comprises the following steps:

Pressure data generated by a distributed piezoelectric ceramic sensor arranged on a concrete structure is collected, the pressure data is analyzed to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, and the method comprises the following steps:

collecting pressure data generated by all piezoelectric ceramic sensing units contained in the distributed piezoelectric ceramic sensor arranged on the concrete structure;

based on the installation position and the installation posture of the pressure ceramic sensing unit on the concrete structure, converting the pressure data into corresponding pressure vectors;

generating pressure field distribution information formed by the whole concrete structure under the action of external force based on pressure vectors corresponding to all the pressure ceramic sensing units;

based on the pressure field distribution information, determining the pressure deformation trend of all areas under the concrete structure, including:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

3. The method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor according to claim 1, wherein:

based on the pressure deformation trend, determining a compression anomaly region existing in the concrete structure comprises the following steps:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

collecting the image of the pressed abnormal region, analyzing the image to obtain the structural defect existence information of the pressed abnormal region, and comprising the following steps:

acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

4. The method for monitoring the health of a concrete structure based on a distributed piezoelectric ceramic sensor according to claim 1, wherein:

based on the structural defect existence information and the environmental information corresponding to the position of the pressed abnormal region, judging whether the pressed abnormal region has a structural defect deterioration trend or not comprises the following steps:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, judging whether the whole concrete structure is subjected to a collapse event or not, so as to perform corresponding alarm notification operation, and the method comprises the following steps:

obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

Based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.

5. The method for monitoring the health of a concrete structure based on the distributed piezoelectric ceramic sensor as claimed in claim 4, wherein the method comprises the following steps:

based on the structural defect existence information and wind speed/wind direction information corresponding to the position of the pressure abnormal region, judging whether the trend of increasing the number, the area, the distribution density or the average depth of the structural cracks on the surface of the pressure abnormal region exists or not, wherein the trend comprises the following steps:

step S1, obtaining a comprehensive vertical wind speed value on the surface of the pressure-bearing abnormal region according to the wind speed/wind direction information corresponding to the position of the pressure-bearing abnormal region and the normal vector of the surface of the pressure-bearing abnormal region by using the following formula (1),

in the above-mentioned formula (1),representing a composite vertical wind speed value over the surface of the stress anomaly region; v (a) represents a wind speed value of an a-th wind direction on the surface of the pressure-receiving abnormal region; / >A direction vector representing an a-th wind direction on the surface of the pressure abnormal region; />A normal vector representing the surface of the pressure-receiving abnormal region; the || represents modulo; p represents the total number of wind directions received on the surface of the abnormal pressure area;

step S2, obtaining a weight value of each wind direction according to the wind speed/wind direction information corresponding to the position of the abnormal pressed region and the normal vector of the surface of the abnormal pressed region by using the following formula (2),

in the above formula (2), G (a) represents a weight value of an a-th wind direction on the surface of the pressure-receiving abnormal region; f </u > represents a positive number selection function, wherein if the value in the bracket is a positive number, the function value of the positive number selection function is the value in the bracket, and if the value in the bracket is a non-positive number, the function value of the positive number selection function is 0;

step S3, judging whether the number of structural cracks on the surface of the abnormal pressed area is increased, the distribution density is increased or the average depth is increased or not according to the weight value of each wind direction and the comprehensive vertical wind speed value on the surface of the abnormal pressed area by using the following formula (3),

In the above formula (3), E represents a determination value for determining whether or not there is a tendency of an increase in the number, an increase in the area, an increase in the distribution density, or an increase in the average depth of the structural cracks on the surface of the pressure-receiving abnormal region;

if e=1, the number of structural cracks on the surface of the abnormal pressed region tends to increase, the area increases, the distribution density increases, or the average depth increases;

if e=0, the structural cracks on the surface of the pressure-receiving abnormal region do not have a tendency to increase in number, area, distribution density, or average depth.

6. A distributed piezoelectric ceramic sensor-based concrete structure health monitoring system, comprising:

the pressure field determining module is used for collecting pressure data generated by a distributed piezoelectric ceramic sensor arranged on the concrete structure and analyzing the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force;

the deformation trend determining module is used for determining the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information;

the abnormal region determining module is used for determining a pressed abnormal region of the concrete structure based on the pressure deformation trend;

The structural defect identification module is used for acquiring images of the pressed abnormal region and analyzing the images to obtain structural defect existence information of the pressed abnormal region;

the structural defect deterioration trend identification module is used for judging whether the structural defect deterioration trend exists in the pressed abnormal region or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region;

and the alarm notification module is used for judging whether the whole concrete structure is subjected to a collapse event or not based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation.

7. A distributed piezoceramic sensor-based concrete structure health monitoring system as recited in claim 5, wherein:

the pressure field determining module collects pressure data generated by a distributed piezoelectric ceramic sensor installed on a concrete structure, analyzes the pressure data to obtain pressure field distribution information formed by the whole concrete structure under the action of external force, and comprises the following steps:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

The deformation trend determining module determines the pressure deformation trend of all areas subordinate to the concrete structure based on the pressure field distribution information, and comprises the following steps:

extracting surface pressure distribution information of each area subordinate to the concrete structure from the pressure field distribution information; determining a 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 comprises the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure.

8. A distributed piezoceramic sensor-based concrete structure health monitoring system as recited in claim 5, wherein:

the abnormal region determining module determines a pressed abnormal region existing in the concrete structure based on the pressure deformation trend, and comprises the following steps:

judging whether the deformation of the pressure acting surface of the area currently belongs to torsional deformation or not and whether the torsional deformation exceeds the maximum bearable deformation of the area or not based on the pressure deformation trend including the deformation direction and the deformation amplitude of the pressure acting surface of the area under the surface pressure; if yes, determining that the area belongs to the abnormal compression area;

The structural defect identification module acquires the image of the pressed abnormal region, analyzes the image to obtain the structural defect existence information of the pressed abnormal region, and comprises the following steps:

acquiring binocular images of the surface of the pressed abnormal region, so as to generate a three-dimensional image of the surface of the pressed abnormal region; and analyzing the three-dimensional image to obtain the number of structural cracks, the structural crack distribution area, the structural crack distribution density and the structural crack average depth on the surface of the pressed abnormal region, and taking the number, the structural crack distribution area, the structural crack distribution density and the structural crack average depth as the structural defect existence information.

9. A distributed piezoceramic sensor-based concrete structure health monitoring system as recited in claim 5, wherein:

the structural defect degradation trend identification module judges whether the structural defect degradation trend exists in the pressed abnormal region or not based on the structural defect existence information and the environment information corresponding to the position of the pressed abnormal region, and comprises the following steps:

judging whether the number of the structural cracks on the surface of the pressure abnormal region is increased, the area is increased, the distribution density is increased or the average depth is increased or not according to the structural defect existence information and the wind speed/wind direction information corresponding to the position of the pressure abnormal region; if the structural defect exists, the abnormal pressed region is indicated to have a structural defect deterioration trend;

The alarm notification module judges whether the whole concrete structure can generate a collapse event based on the internal stress information of the pressed abnormal region with the structural defect deterioration trend, so as to perform corresponding alarm notification operation, and the alarm notification module comprises the following steps:

obtaining internal stress information of the pressed abnormal region with the structural defect deterioration trend based on pressure field distribution information corresponding to the pressed abnormal region with the structural defect deterioration trend and structural defect form information of the pressed abnormal region with the structural defect deterioration trend;

based on the internal stress information, determining whether the pressed abnormal region with the structural defect deterioration trend is in an internal stress overload state; if yes, determining whether the whole concrete structure is subjected to a collapse event or not, and accordingly carrying out corresponding alarm notification operation.