System for monitoring and analyzing backfill of civil air defense project

Abstract

The invention relates to the technical field of monitoring analysis, and discloses a monitoring analysis system for civil air defense engineering backfill. The monitoring analysis subsystem comprises a monitoring module and an analysis decision module and is used for collecting engineering health data of the civil air defense engineering at a monitoring analysis point and judging whether to execute health restoration operation, the engineering monitoring subsystem comprises a three-dimensional modeling module and a backfilling monitoring module and is used for constructing a civil air defense three-dimensional model, and the tracking monitoring subsystem comprises a sampling analysis module and an analysis decision module. Generating a backfill level of the civil air defense project; according to the civil air defense three-dimensional model construction method, the civil air defense three-dimensional model is constructed by collecting the three-dimensional modeling data, and the settlement and crack areas in the civil air defense three-dimensional model are identified, so that the actual form and structure of the civil air defense project can be accurately simulated; therefore, the defect area of the civil air defense project can be automatically, accurately and quickly identified and calculated in the civil air defense three-dimensional model, so that the high-quality monitoring and analysis effect of the civil air defense project is achieved.

Description

Technical Field

[0001] The present invention relates to the field of monitoring and analysis technology, and more specifically, to a backfill monitoring and analysis system for civil air defense projects. Background Art

[0002] Civil air defense projects refer to facilities and equipment used to defend against air raids, nuclear attacks and other war disasters. Especially for civil air defense projects built underground, as the construction years continue to increase, they will be increasingly affected by factors such as geological activities, surrounding construction disturbances and material aging, which will lead to safety hazards such as uneven settlement and crack expansion in civil air defense projects. In order to timely and accurately understand the settlement and crack information of civil air defense projects, and meet the subsequent material backfill needs for settlement and cracks, it is necessary to conduct regular monitoring and analysis of civil air defense projects.

[0003] The patent application with reference publication number CN115169982A discloses an intelligent monitoring, evaluation and analysis system for surrounding rock stability of highway engineering tunnels, including a surrounding rock moisture monitoring module, a surrounding rock moisture analysis module, a surrounding rock concrete monitoring module, a surrounding rock concrete analysis module, a surrounding rock deformation monitoring module, a surrounding rock deformation analysis module, a surrounding rock comprehensive analysis module, an early warning display terminal and a database; it strengthens the inspection of tunnel surrounding rock stability hazards by analyzing four dimensions of tunnel surrounding rock concrete thickness, moisture, number of cracks and crack depth corresponding to each surrounding rock concrete crack, improves the use safety of the tunnel, and has a high level of intelligence and automation; The existing backfill monitoring and analysis system collects massive amounts of multi-dimensional data from civil air defense projects, and manually analyzes and calculates the collected data one by one, thereby identifying defects such as settlement and cracks in the civil air defense projects. For example, in the above-mentioned patent application, it analyzes data in four dimensions to achieve the monitoring and analysis effect of underground structures. Since the data dimensions involved in the monitoring and analysis of civil air defense projects are relatively wide and large in number, relying on manual analysis and calculation of multi-dimensional data one by one will cause the problem of slow monitoring and analysis speed. At the same time, there is a lack of simulation operations for civil air defense projects, which makes it impossible to automatically, accurately and quickly identify potential settlement and crack defects in civil air defense projects in all aspects, which in turn leads to low accuracy of the monitoring and analysis results of civil air defense projects.

[0004] In view of this, the present invention proposes a backfill monitoring and analysis system for civil air defense projects to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art and to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a monitoring and analysis system for backfilling of civil air defense projects, comprising a monitoring and analysis subsystem, an engineering monitoring subsystem and a tracking monitoring subsystem; The monitoring and analysis subsystem includes a monitoring module and an analysis and decision-making module; The monitoring module is used to determine the monitoring period of the civil air defense project, take the first moment after the corresponding length of a monitoring period as the monitoring and analysis point, and collect the engineering health data of the civil air defense project at the monitoring and analysis point; The analysis and decision-making module is used to perform health analysis on the project health data, identify the health status of the civil air defense project at the monitoring and analysis point, and determine whether to perform health repair operations; The engineering monitoring subsystem includes a 3D modeling module and a backfill monitoring module; The three-dimensional modeling module is used to mark the modeling collection points that are spaced and bidirectionally distributed in the civil air defense project, collect the point cloud data set and image data of the civil air defense project at the modeling collection points, and construct a three-dimensional model of the civil air defense; A backfill monitoring module is used to identify the backfill area in the civil air defense three-dimensional model based on the area identification criteria and calculate the effective backfill volume of the backfill area; The tracking and monitoring subsystem includes a sampling and analysis module; The sampling and analysis module is used to formulate the sampling priority of the backfill area, sample and analyze the backfill area according to the sampling priority, and generate the backfill level of the civil air defense project.

[0006] Furthermore, the method for determining the monitoring period is: The completion time of the civil air defense project is found through the database, and the time between the completion time and the current time is recorded as the completion time, and the Time points of equal duration distribution; Through the database, all humidity sensors in the civil air defense project are queried one by one. The humidity value at each time point is recorded as the maximum humidity value as the effective humidity. effective humidity; Will The effective humidity is accumulated and averaged to obtain the mean humidity value, and the mean humidity value, the maximum effective humidity value and the minimum effective humidity value are added and averaged to obtain the soil humidity value; The earthquake resistance level of the civil air defense project can be queried through the construction drawings, and the earthquake resistance level, construction time and soil moisture value are assigned corresponding proportional coefficients and compared to calculate the monitoring period.

[0007] Furthermore, engineering health data include settlement concentration rate, crack morphology value and ground water intrusion value; The method for collecting the sedimentation concentration rate is: The indoor ground of the civil air defense project is photographed from above by distributed cameras to obtain B ground images, and the B ground images are stitched together in sequence into a bird's-eye view image according to the orientation of the indoor ground; Based on the preset segmentation length, the top view image is segmented into C subgrids of the same size, and the corner points of the subgrids are recorded as settlement monitoring points, thus obtaining D settlement monitoring points; The real-time settlement values ​​of D settlement monitoring points at the monitoring and analysis point are measured one by one by a vibrating-wire settlement meter, and the original settlement values ​​of D settlement monitoring points at the previous monitoring and analysis point are queried respectively; After subtracting the D real-time settlement values ​​from the corresponding D original settlement values ​​one by one, D settlement difference values ​​are obtained, and the settlement monitoring point whose settlement difference is greater than the calibrated settlement value is recorded as the target settlement point, and the settlement difference value is obtained. target settlement point; Measure the distance between any two target settlement points one by one, add the maximum distance value and the minimum distance value, and then calculate the average to obtain the target length; Respectively Take the target settlement point as the origin and draw a circle with the target length as the radius to obtain Settlement circles are counted one by one. The number of target settlement points within a settlement circle will be The number of target settlement points in each settlement circle is compared with the total number of target settlement points and the average is accumulated to obtain the settlement concentration rate.

[0008] Furthermore, the method for collecting crack morphology values ​​is: At the monitoring and analysis point, a video of the wall of the civil air defense project is shot by a camera, and the crack area in the wall video is identified by computer vision technology. The location of the crack area is marked on the wall of the civil air defense project to obtain F crack locations; Outside the F crack positions, the lengths, widths and depths of the F crack regions are measured one by one by distributed FBG sensors, and the lengths, widths and depths of the F crack regions are compared to obtain F sub-morphological values; The calculation formula of sub-pattern value is: ; In the formula, For the The sub-shape value of the crack area, =1,2,...,F, For the The width of the crack area, For the The length of the crack area, For the The depth of the fracture area; Eliminate the sub-morphological values ​​that are less than the calibrated morphological value, and The sub-morphological values ​​are accumulated and averaged to obtain the crack morphological value.

[0009] Furthermore, the health status includes unhealthy, sub-healthy and healthy. The method of identifying unhealthy, sub-healthy and healthy is: When the settlement concentration rate is greater than the settlement safety value, the settlement concentration rate is recorded as pathological data; When the crack morphology value is greater than the crack safety value, the crack morphology value is recorded as pathological data; When the ground water flooding value is greater than the water flooding safety value, the ground water flooding value is recorded as pathological data; Count the number of pathological data in the engineering health data and record it as the pathological value; When the sickness value is 0, the health state is recorded as positive health; When the pathological value is 1, the health status is recorded as sub-health; When the sickness value is 2 or 3, the health state is recorded as unhealthy.

[0010] Further, the method for determining whether to perform a health repair operation is: When the health status of the civil air defense project is positive, it is determined that the health repair operation will not be performed; When the health status of the civil air defense project is sub-healthy or unhealthy, it is determined to perform health repair operations.

[0011] Furthermore, the method of marking the modeling collection points is: A1: Query the overhead construction drawing of the civil air defense project through the database, draw a line along the location of the outer boundary of the civil air defense project, and draw the project boundary line; A2: Draw a center line that bisects the project boundary line along the entry and exit direction of the civil air defense project, and record the project boundary lines on both sides of the center line as the first boundary and the second boundary respectively; A3: Taking the intersection of the center line and the engineering boundary line as the starting point, mark G sub-collection points and K main collection points at intervals on the first boundary and the second boundary respectively, and arrange 3D laser scanners with opposite scanning directions on the G sub-collection points and the K main collection points respectively; A4: Collect the scanned image of the 3D laser scanner at the first sub-collection point, adjust the position of the first sub-collection point on the first boundary until the scanned image of the first sub-collection point covers the starting point, and record the adjusted first sub-collection point as the first modeling point; A5: Collect the scanned image of the 3D laser scanner at the first mother acquisition point, adjust the position of the first mother acquisition point on the second boundary until the overlapping area of ​​the scanned image of the first mother acquisition point and the scanned image of the first child acquisition point is greater than 35% of the scanned image area of ​​the first child acquisition point, and record the adjusted first mother acquisition point as the second modeling point; A6: Eliminate the first modeling point and the second modeling point respectively, and repeat steps A4-A5 for the remaining sub-collection points and parent collection points until all engineering boundary lines are covered by the scanned image, and obtain T first modeling points and W second modeling points; A7: After summarizing T first modeling points and W second modeling points, S modeling points are obtained, and the S modeling points are marked one by one at the corresponding positions of the civil air defense project to obtain S modeling collection points.

[0012] Furthermore, the method of constructing a three-dimensional model of civil air defense is as follows: The indoor space of the civil air defense project is scanned by a 3D laser scanner at S modeling collection points to obtain S point cloud data sets and S image data; Import the S point cloud data sets into the point cloud processing tool for denoising and filtering, and align all the point clouds in the S point cloud data sets to the same coordinate system using the ICP algorithm; Convert all point clouds in the coordinate system into triangular mesh models, smooth the triangular mesh models, and construct a basic three-dimensional model; The original three-dimensional coordinates of all point clouds in the basic three-dimensional model are queried, the image three-dimensional coordinates that are consistent with the original three-dimensional coordinates are marked in the S image data, and the image features corresponding to the image three-dimensional coordinates are imported into the basic three-dimensional model to construct a civil air defense three-dimensional model.

[0013] Furthermore, the region identification criterion is: the corresponding region where the actual length value of the point-to-point connecting line is greater than the calibrated length value is recorded as the backfill region; The method for calculating the effective backfill volume is: Mark all the point clouds in the civil air defense three-dimensional model one by one, and connect any two point clouds in adjacent positions in sequence to obtain L point-to-point connecting lines; Measure the actual lengths of L point-to-point connecting lines one by one, record the point-to-point connecting lines whose actual lengths are greater than the calibrated lengths as regional lines, and record the point clouds at both ends of all regional lines as regional point clouds, and record the remaining point clouds as non-regional point clouds; All non-regional point clouds in the civil air defense three-dimensional model are eliminated, and the regional point clouds in the outer layer and adjacent positions are connected two by two to generate backfill area; Mark them one by one The 3D coordinates of all regional point clouds in the backfill area are obtained, and the 3D coordinates are imported into the volume calculation tool to calculate the volume of the backfill area and record it as the sub-backfill volume; Find out the loss rate of backfill materials and After the backfill volumes of each item are accumulated one by one and combined with the loss rate of the backfill material, the effective backfill volume is calculated; The calculation formula for effective backfill volume is: ; In the formula, is the effective backfill volume, For the The amount of sub-backfill in the backfill area, is the loss rate of backfill material.

[0014] Furthermore, the sampling priority is: the larger the priority value of the backfill area, the earlier the sampling order of the backfill area; The sampling and analysis methods for the backfill area are: Mark the point cloud of the entrance and exit positions of the civil air defense project in the civil air defense three-dimensional model, and record the point cloud in the middle as the entrance and exit point cloud, and measure them one by one. The distance from the backfill area to the import and export point cloud is obtained Sampling distance value; Will The sampling distance values ​​and After assigning different proportional coefficients to each sub-backfill amount and adding them together, we get priority value; According to the priority value from large to small, The backfill area was sampled and the Backfill samples; Backfill grades include qualified grades and unqualified grades.

[0015] The technical effects and advantages of the present invention for a backfill monitoring and analysis system for civil air defense projects are as follows: The present invention collects engineering health data of civil air defense projects at monitoring and analysis points, and evaluates and analyzes the health status of civil air defense projects based on the engineering health data. It can accurately collect multi-dimensional quality data in civil air defense projects, thereby accurately identifying and judging existing defects such as settlement and cracks in civil air defense projects according to their actual conditions. At the same time, by collecting three-dimensional modeling data to construct a civil air defense three-dimensional model, and identifying the settlement and crack areas in the civil air defense three-dimensional model, the actual form and structure of the civil air defense project can be accurately simulated, and the defective areas of the civil air defense project can be automatically, accurately and quickly identified and calculated in the civil air defense three-dimensional model. This can avoid the problems of inefficiency and insufficient precision caused by manual calculation of massive and complicated data one by one, and can also provide accurate data support for the subsequent repair operation of backfill materials in settlement and crack areas, ensuring that potential settlement and crack defects in civil air defense projects can be comprehensively and accurately identified, thereby achieving high-quality monitoring and analysis effects on civil air defense projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the architecture of a system for monitoring and analyzing backfilling of civil air defense projects provided in the first embodiment of the present invention; Figure 2 A flowchart of a method for monitoring and analyzing backfill in civil air defense projects provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figure 1 As shown, the monitoring and analysis system for backfilling of civil air defense projects described in this embodiment includes a monitoring and analysis subsystem, an engineering monitoring subsystem and a tracking monitoring subsystem, and the monitoring and analysis subsystem, the engineering monitoring subsystem and the tracking monitoring subsystem are connected to each other by wired or wireless communication; Civil air defense projects refer to facilities and equipment used to defend against air raids, nuclear attacks and other war disasters. In this embodiment, civil air defense projects specifically refer to air-raid shelters.

[0019] The monitoring and analysis subsystem refers to the subsystem of data collection, comparative analysis and status output in civil air defense projects that can affect the quality and health status of civil air defense projects. It serves as the system precursor of the civil air defense project backfill monitoring and analysis system, and provides a data basis for the subsequent operation of the civil air defense project backfill monitoring and analysis system.

[0020] The monitoring and analysis subsystem includes a monitoring module and an analysis and decision-making module; The monitoring module determines the monitoring cycle of the civil air defense project, formulates the monitoring and analysis points, and collects the engineering health data of the civil air defense project at the monitoring and analysis points. The engineering health data includes the settlement concentration rate, crack morphology value and ground water infiltration value; The monitoring cycle refers to the time span between two adjacent monitoring and analysis of civil air defense projects, which can provide a time interval standard for each monitoring and analysis of civil air defense projects. The smaller the monitoring cycle, the smaller the time span between two adjacent monitoring and analysis, and vice versa. In actual situations, the size of the monitoring cycle is often affected by many factors, such as the length of time the civil air defense project was built, the soil moisture content of the civil air defense project, the seismic resistance level of the civil air defense project, etc. The method for determining the monitoring period is: The completion time of the civil air defense project is found through the database, and the time between the completion time and the current time is recorded as the completion time, and the Time points of equal duration distribution; Through the database, all humidity sensors in the civil air defense project are queried one by one. The humidity value at each time point is recorded as the maximum humidity value as the effective humidity. effective humidity; Will The effective humidity is accumulated and averaged to obtain the humidity mean, and the humidity mean, the maximum effective humidity and the minimum effective humidity are added and averaged to obtain the soil humidity value; the combination of the humidity mean, the maximum effective humidity and the minimum effective humidity can effectively avoid the interference of excessive or too small humidity data on the subsequent soil humidity value calculation, thereby improving the calculation accuracy of the soil humidity value; The calculation formula for soil moisture value is: ; In the formula, is the soil moisture value, For the The effective humidity at a certain time point is is the maximum effective humidity, is the minimum effective humidity; The seismic resistance level of the civil air defense project is found through the construction drawings, and the seismic resistance level, construction time and soil moisture value are assigned corresponding proportional coefficients and compared to calculate the monitoring period; The calculation formula for the monitoring period is: ; In the formula, For the monitoring cycle, For earthquake resistance level, For the construction time, , , are the proportional coefficients of earthquake resistance level, construction time and soil moisture value, respectively, and , , Both are greater than 0.

[0021] The monitoring and analysis point refers to the time point used for collecting specific data and monitoring and analyzing the quality and health status of civil air defense projects, and serves as the calibration time for running the monitoring and analysis subsystem, engineering monitoring subsystem and tracking monitoring subsystem, ensuring that the monitoring and analysis subsystem, engineering monitoring subsystem and tracking monitoring subsystem can and can only run at the time corresponding to the monitoring and analysis point; Specifically, the monitoring and analysis point is the first moment after a corresponding duration of a monitoring cycle.

[0022] Project health data refers to the diverse data that can affect the quality and health status of civil air defense projects at the monitoring and analysis points, and can be used as the data basis for analyzing and judging whether the health status of civil air defense projects is good or not; Engineering health data include settlement concentration rate, crack morphology value and ground water intrusion value; The settlement concentration rate refers to the concentration of points where ground settlement occurs in civil air defense projects. The greater the settlement concentration rate, the more concentrated the locations where settlement occurs in civil air defense projects, and the worse the health status of civil air defense projects. The method for collecting the sedimentation concentration rate is: The indoor ground of the civil air defense project is photographed from above by distributed cameras to obtain B ground images, and the B ground images are stitched together in sequence into a bird's-eye view image according to the orientation of the indoor ground. When stitching the ground images into a bird's-eye view image, it is necessary to stitch them together according to the actual direction and position of the indoor ground of the civil air defense project, so as to ensure that all ground images can maintain an orderly stitching effect and avoid stitching errors when stitching the bird's-eye view images. Based on the preset segmentation length, the overhead image is segmented into C subgrids of the same size, and the corner points of the subgrids are recorded as settlement monitoring points to obtain D settlement monitoring points; the preset segmentation length is used to numerically represent the side length of the subgrid, so as to ensure that the area size of subsequent subgrids remains consistent; The real-time settlement values ​​of D settlement monitoring points at the monitoring and analysis point are measured one by one by a vibrating-wire settlement meter, and the original settlement values ​​of D settlement monitoring points at the previous monitoring and analysis point are queried respectively; After subtracting the D real-time settlement values ​​from the corresponding D original settlement values ​​one by one, D settlement difference values ​​are obtained, and the settlement monitoring point whose settlement difference is greater than the calibrated settlement value is recorded as the target settlement point, and the settlement difference value is obtained. The calibrated settlement value refers to the minimum settlement difference of the settlement monitoring point recorded as the target settlement point, which can provide a numerical basis for the subsequent identification of the target settlement point; Measure the distance between any two target settlement points one by one, add the maximum distance value and the minimum distance value, and then calculate the average to obtain the target length; The target length is calculated as: ; In the formula, is the target length, is the maximum value of the distance value, is the minimum value of the distance value; Respectively Take the target settlement point as the origin and draw a circle with the target length as the radius to obtain Settlement circles are counted one by one. The number of target settlement points within a settlement circle will be The number of target settlement points in each settlement circle is compared with the total number of target settlement points and then the average is accumulated to obtain the settlement concentration rate; when the number of target settlement points in the settlement circle is more, it means that the number of points where settlement occurs in the settlement circle is more, and the settlement position is more concentrated; The calculation formula of sedimentation concentration rate is: : In the formula, is the sedimentation concentration rate, For the The number of target settlement points within a settlement circle, is the total amount of the target settlement point.

[0023] The crack morphology value refers to the severity of the wall crack phenomenon in the civil air defense project. The larger the crack morphology value, the greater the severity of the wall crack phenomenon in the civil air defense project, and the worse the health status of the civil air defense project. The method for collecting crack morphology values ​​is: At the monitoring and analysis point, a video of the wall of the civil air defense project is shot by a camera, and the crack area in the wall video is identified by computer vision technology. The location of the crack area is marked on the wall of the civil air defense project to obtain F crack locations; Outside the F crack positions, the lengths, widths and depths of the F crack regions are measured one by one by distributed FBG sensors, and the lengths, widths and depths of the F crack regions are compared to obtain F sub-morphological values; The calculation formula of sub-pattern value is: ; In the formula, For the The sub-shape value of the crack area, =1,2,...,F, For the The width of the crack area, For the The length of the crack area, For the The depth of the fracture area; Eliminate the sub-morphological values ​​that are less than the calibrated morphological value, and The sub-morphological values ​​are accumulated and averaged to obtain the crack morphological value; the calibrated morphological value refers to the minimum value of the sub-morphological value that can be used in the subsequent crack morphological value calculation, which can increase the calculation threshold of the subsequent crack morphological value, thereby effectively avoiding the interference caused by the crack area with too small area in the subsequent calculation and reducing the calculation burden; The calculation formula of the crack morphology value is: ; In the formula, is the crack morphology value, For the Sub-shape value.

[0024] The ground water immersion value refers to the maximum value of the depth of water when water accumulates on the ground in the civil air defense project. The larger the ground water immersion value is, the deeper the depth of water accumulates when water accumulates on the ground in the civil air defense project is, and the worse the health status of the civil air defense project is. The ground water immersion value is obtained by taking the maximum value of the water immersion values ​​monitored by the water immersion sensors deployed on the ground of the civil air defense project at the monitoring and analysis points.

[0025] The analysis and decision-making module performs health analysis on the project health data, identifies the health status of the civil air defense project at the monitoring and analysis point, and determines whether to perform health repair operations; Health analysis refers to the operation of comparing and identifying the numerical size of the project health data collected by the monitoring module at the monitoring and analysis point. It can analyze the impact of the size of each specific data in the project health data on the health status of the civil air defense project, and identify the health status of the civil air defense project at the monitoring and analysis point based on the final health analysis results.

[0026] The health status is used to specifically indicate the actual building quality and health condition of civil air defense projects as civil air defense facilities, and to provide analysis results on the actual quality and health level of civil air defense projects.

[0027] Specifically, the health status includes unhealthy, sub-healthy and healthy; unhealthy, sub-healthy and healthy are used to represent the actual building quality of civil air defense projects as civil air defense facilities from bad to good, and serve as a reference for subsequent judgment on whether the civil air defense projects need to be repaired; The methods to identify unhealthy, sub-healthy and healthy are: Compare the settlement concentration rate, crack morphology value and ground water infiltration value of civil air defense projects with the corresponding safety values; When the settlement concentration rate is greater than the settlement safety value, it means that the concentration of points where ground settlement occurs in the civil air defense project is too high, and the settlement concentration rate is recorded as pathological data; When the crack morphology value is greater than the crack safety value, it means that the severity of the wall crack phenomenon in the civil air defense project is too high, and the crack morphology value is recorded as pathological data; When the ground water flooding value is greater than the flooding safety value, it means that the maximum depth of water accumulation in the civil air defense project is too large, and the ground water flooding value is recorded as pathological data; Count the number of pathological data in the engineering health data and record it as the pathological value; When the pathological value is 0, it means that there is no pathological data in the engineering health data. At this time, the quality of the civil air defense project is high and the health level is good, so the health status is recorded as positive health; When the pathological value is 1, it means that there is one pathological data in the engineering health data. At this time, the quality of the civil air defense project is general and the health level is medium, so the health status is recorded as sub-healthy; When the pathological value is 2 or 3, it means that 2 or 3 pathological data appear in the project health data. At this time, the quality of the civil air defense project is low and the health level is poor, so the health status is recorded as unhealthy.

[0028] Health restoration operation refers to the specific measures to be taken to restore the abnormal and pathological phenomena when the quality and health of civil air defense projects show abnormal and pathological phenomena, and it serves as the basis for accurate analysis of the quality and health of civil air defense projects and formulation of subsequent specific decisions; In actual situations, when abnormal pathological phenomena occur in civil air defense projects, it is necessary to discover the abnormal pathological phenomena in a timely manner and accurately formulate corresponding decisions based on the abnormal pathological phenomena, so as to carry out targeted repairs on the abnormal pathological phenomena.

[0029] The method for determining whether to perform a health repair operation is: When the health status of the civil air defense project is positive health, there is no abnormal pathological phenomenon in the civil air defense project, and no subsequent repair processing is required, so it is determined that the health repair operation will not be performed; When the health status of the civil air defense project is sub-healthy or unhealthy, abnormal pathological phenomena have occurred in the civil air defense project and subsequent repair processing is required, then it is determined to perform a health repair operation.

[0030] The engineering monitoring subsystem refers to a subsystem that can simulate, analyze and repair unhealthy phenomena such as settlement and cracks in civil air defense projects. It serves as the system intermediate of the civil air defense project backfill monitoring and analysis system, and plays a connecting role in the operation of the civil air defense project backfill monitoring and analysis system.

[0031] The engineering monitoring subsystem includes a 3D modeling module and a backfill monitoring module; The three-dimensional modeling module marks the modeling collection points in the civil air defense project, collects the three-dimensional modeling data of the civil air defense project at the modeling collection points, and constructs a three-dimensional model of the civil air defense; The modeling collection point refers to the collection location in the civil air defense project used to provide the diversified data required for subsequent 3D modeling operations, which can ensure that the 3D modeling data required for subsequent 3D modeling can be collected at the corresponding position of the modeling collection point; When conducting 3D modeling of civil air defense projects, in order to ensure the comprehensiveness and integrity of subsequent 3D modeling data, the distance between adjacent modeling collection points needs to be kept reasonable, not too large or too small, and a certain proportion of overlap needs to be maintained between the 3D modeling data collected at two adjacent modeling collection points, thereby providing reasonable and comprehensive data support for the subsequent aggregation of all 3D modeling data and the construction of 3D models; The method of marking the modeling collection points is: A1: Query the overhead construction drawing of the civil air defense project through the database, draw a line along the location of the outer boundary of the civil air defense project, and draw the project boundary line; A2: Draw a center line that bisects the project boundary line along the entry and exit direction of the civil air defense project, and record the project boundary lines on both sides of the center line as the first boundary and the second boundary respectively; the center line is used to divide the project boundary line into two, so that the first boundary and the second boundary can represent the indoor walls on both sides of the civil air defense project respectively; A3: Taking the intersection of the center line and the engineering boundary line as the starting point, mark G sub-collection points and K main collection points at intervals on the first boundary and the second boundary respectively, and arrange 3D laser scanners with opposite scanning directions on the G sub-collection points and the K main collection points respectively; A4: Collect the scanned image of the 3D laser scanner at the first sub-collection point, adjust the position of the first sub-collection point on the first boundary until the scanned image of the first sub-collection point covers the starting point, and record the adjusted first sub-collection point as the first modeling point; A5: Collect the scanned image of the 3D laser scanner at the first mother acquisition point, adjust the position of the first mother acquisition point on the second boundary until the overlapping area between the scanned image of the first mother acquisition point and the scanned image of the first child acquisition point is greater than 35% of the scanned image area of ​​the first child acquisition point, and record the adjusted first mother acquisition point as the second modeling point; when there is an overlapping area, it means that there is an overlapping area between the scanned image of the child acquisition point and the scanned image of the mother acquisition point, which can ensure that the 3D laser scanners on the first boundary and the second boundary can scan and obtain all the indoor structural data of the civil air defense project, avoid scanning omissions, and thus avoid scanning blind areas; A6: Eliminate the first modeling point and the second modeling point from the G sub-collection points and the K main collection points respectively, and repeat steps A4-A5 for the remaining sub-collection points and the main collection points until all the engineering boundary lines are covered by the scanned image, thereby obtaining T first modeling points and W second modeling points; A7: After summarizing T first modeling points and W second modeling points, S modeling points are obtained, and the S modeling points are marked one by one at the corresponding positions of the civil air defense project to obtain S modeling collection points.

[0032] It should be noted that the scanning image on the first boundary is facing the location of the second boundary, and the scanning image includes part of the second boundary. Similarly, the scanning image on the second boundary is facing the location of the first boundary, and the scanning image includes part of the first boundary. This can ensure that the three-dimensional laser scanner can capture all area locations inside the civil defense project room.

[0033] Three-dimensional modeling data refers to the data collected at the modeling collection point for subsequent three-dimensional modeling, and is constructed into the required civil air defense three-dimensional model, so that the civil air defense three-dimensional model can simulate the indoor form structure and expression form of the civil air defense project; The 3D modeling data includes point cloud data set and image data; the point cloud data set is used to represent the 3D coordinate information of all indoor point cloud positions of the civil air defense project, and the image data is used to represent the color texture information of all indoor positions of the civil air defense project; The method of constructing a three-dimensional model of civil air defense is: The indoor space of the civil air defense project is scanned by a 3D laser scanner at S modeling collection points to obtain S point cloud data sets and S image data; Import S point cloud data sets into the point cloud processing tool for denoising and filtering, and align all point clouds in the S point cloud data sets to the same coordinate system through the ICP algorithm; the point cloud processing tool denoising and filtering is a key step in three-dimensional data processing, which can effectively remove the noise and outliers of the point cloud terminal and improve the quality of the point cloud data; the point cloud processing tool denoising and filtering belongs to the existing technology in this field, and can adopt algorithms such as pass-through filtering, voxel filtering, and statistical filtering according to actual needs; the ICP algorithm is used to align two or more point cloud data sets to the same coordinate system, which is widely used in the fields of three-dimensional reconstruction, SLAM, civil air defense engineering monitoring, etc., and is also the existing technology in this field. The point cloud processing tool denoising and filtering and the ICP algorithm are not the innovation points of this embodiment, and will not be elaborated in detail here; Convert all point clouds in the coordinate system into triangular mesh models, and smooth the triangular mesh models to construct a basic three-dimensional model; triangular mesh models and smoothing are also existing technologies in this field, which are used to construct point clouds into three-dimensional models; The original 3D coordinates of all point clouds in the basic 3D model are queried, the 3D coordinates of the images that are consistent with the original 3D coordinates are marked in the S image data, and the image features corresponding to the 3D coordinates of the images are imported into the basic 3D model to construct a 3D model of civil air defense. Image features are used to represent specific information in image data, including color, texture, etc., so that the image features can be used to render and color the 3D model.

[0034] It should be noted that the constructed civil air defense three-dimensional model is a simulation model with position information and color texture information, so that the civil air defense three-dimensional model can fully simulate the actual indoor conditions of the civil air defense project to ensure the subsequent identification and calculation of cracks and settlement positions of the civil air defense project.

[0035] The backfill monitoring module identifies the backfill area in the civil air defense three-dimensional model based on the area recognition criteria and calculates the effective backfill volume of the backfill area; The backfill area refers to the specific location where settlement and cracks exist in the civil air defense three-dimensional model, and serves as the location basis for subsequent backfill repairs in the civil air defense project; Due to the complexity and uncertainty of the internal environment of civil air defense projects, there may be more than one area where settlement and cracks exist in civil air defense projects. Therefore, in order to ensure that all settlement and cracks can be completely backfilled and repaired, it is necessary to accurately identify the location of each settlement and crack. At the same time, the backfill area also needs to be accurately identified and segmented from the non-backfill area to improve the subsequent calculation operations of the backfill area. Therefore, it is necessary to identify the backfill area with the help of regional recognition criteria.

[0036] The area recognition criterion is: the corresponding area where the actual length value of the point-to-point connecting line is greater than the calibrated length value is recorded as the backfill area; this can ensure that all point clouds in the civil air defense three-dimensional model can be effectively and accurately identified, maintaining the accuracy of backfill area identification.

[0037] After identifying the backfill area, it is necessary to identify and calculate the space size corresponding to the backfill area and obtain the effective backfill volume, so that the effective backfill volume can be used as the data basis for the subsequent backfill of the settlement and crack phenomena of the civil air defense project; The method for calculating the effective backfill volume is: Mark all the point clouds in the civil air defense three-dimensional model one by one, and connect any two point clouds in adjacent positions in sequence to obtain L point-to-point connecting lines; The actual length values ​​of the L point-to-point connecting lines are measured one by one, and the point-to-point connecting lines whose actual length values ​​are greater than the calibrated length values ​​are recorded as regional lines, and the point clouds at both ends of all regional lines are recorded as regional point clouds, and the remaining point clouds are recorded as non-regional point clouds; the calibrated length value refers to the maximum value of the actual length value between two adjacent point clouds when there is no settlement and crack phenomenon, which can provide an accurate numerical basis for the subsequent identification of regional lines; All non-regional point clouds in the civil air defense three-dimensional model are eliminated, and the regional point clouds in the outer layer and adjacent positions are connected two by two to generate backfill area; Mark them one by one The three-dimensional coordinates of all regional point clouds in the backfill area are obtained, and the three-dimensional coordinates are imported into the volume calculation tool to calculate the volume of the backfill area and record it as the sub-backfill amount; the volume calculation tool is used to measure the volume in the three-dimensional space, which belongs to the existing technology in this field and does not belong to the innovation of this embodiment, and will not be elaborated here; Find out the loss rate of backfill materials and After the backfill volumes of each item are accumulated one by one and combined with the loss rate of the backfill material, the effective backfill volume is calculated; The calculation formula for effective backfill volume is: ; In the formula, is the effective backfill volume, For the The amount of sub-backfill in the backfill area, is the loss rate of backfill material.

[0038] It should be noted that after the effective backfill volume is calculated, the effective backfill volume can be used as the numerical basis for the subsequent backfill materials to be backfilled into the backfill areas corresponding to the settlement positions and crack positions in the civil air defense project, and ensure that the backfill areas of the civil air defense project can be accurately and sufficiently backfilled with backfill materials, thereby achieving the backfill repair effect of the civil air defense project.

[0039] The tracking and monitoring subsystem refers to a subsystem that can perform sampling analysis and result output on the backfill repair in civil air defense projects. It serves as the post-system of the civil air defense project backfill monitoring and analysis system, and plays a role in summarizing the operation of the civil air defense project backfill monitoring and analysis system.

[0040] The tracking and monitoring subsystem includes a sampling and analysis module; The sampling and analysis module formulates the sampling priority of the backfill area, performs sampling and analysis on the backfill area according to the sampling priority, and generates the backfill level of the civil air defense project; After all the backfill areas are effectively backfilled with backfill materials, the backfill areas will be filled with backfill bodies formed by the solidified backfill materials. At this time, it is necessary to sample and analyze the backfill bodies in each backfill area, and analyze the actual backfill effect of each backfill area based on the results of the sampling analysis, thereby achieving accurate monitoring of the backfill quality of the final civil air defense project.

[0041] When sampling and analyzing the backfill body in the backfill area, a certain order is required, and this order is recorded as the sampling priority. Therefore, under the limitation of the sampling priority, the sampling order of the backfill body in each backfill area is calibrated. The sampling priority is usually affected by the backfill volume of the backfill area and the difficulty of sampling, so that the formulation process of the sampling priority can comprehensively consider multiple factors; Specifically, the sampling priority is: the larger the priority value of the backfill area, the earlier the sampling order of the backfill area is; thereby ensuring that all backfill areas can be sampled in order and improving the orderliness and rationality of backfill area sampling.

[0042] The sampling and analysis methods for the backfill area are: Mark the point cloud of the entrance and exit positions of the civil air defense project in the civil air defense three-dimensional model, and record the point cloud in the middle as the entrance and exit point cloud, and measure them one by one. The distance from the backfill area to the import and export point cloud is obtained Sampling distance value; Will The sampling distance values ​​and After assigning different proportional coefficients to each sub-backfill amount and adding them together, we get priority value; The priority value is calculated as: ; In the formula, For the The priority value of the backfill area, For the The sampling distance value of the backfill area, , are the proportional coefficients of sampling distance value and sub-backfill amount, , All are greater than 0; According to the priority value from large to small, The backfill area was sampled and the A backfill sample.

[0043] In getting After the backfill sample is taken, The backfill area corresponding to each backfill body sample is analyzed one by one. During the analysis, it is necessary to The hardness, density and other physical parameters of the backfill body samples are tested and analyzed. The detection of physical parameters such as hardness and density can be completed by existing testing instruments. This technology belongs to the existing technology and will not be elaborated in detail here. At the same time, it is also necessary to analyze whether the backfill area after backfilling has overcome the problems before backfilling; Specifically, we need to The settlement concentration rate, crack morphology value and ground water infiltration value of each backfill area after backfilling are collected and calculated one by one, and compared with the settlement safety value, crack safety value and water infiltration safety value. The backfill grade of the civil air defense project is judged according to whether pathological data appears after comparison and the number of pathological data, so that the backfill grade can indicate the actual backfill effect of the backfill area of ​​the civil air defense project; Specifically, the backfill grade includes a qualified grade and an unqualified grade; and the qualified grade and the unqualified grade are used to indicate whether the actual backfill effect of the backfill area of ​​the civil air defense project is good or bad; In the specific steps of generating qualified grades and unqualified grades, when there is no pathological data in the backfill area after backfilling, it means that the actual backfill effect of the backfill area of ​​the civil air defense project is good, and a qualified grade is generated. When pathological data appears in the backfill area after backfilling, it means that the actual backfill effect of the backfill area of ​​the civil air defense project is poor, and an unqualified grade is generated.

[0044] Regardless of whether a qualified grade or an unqualified grade is generated, the actual backfill grade needs to be saved and recorded, and the saved and recorded data needs to be communicated forward for interaction, so as to achieve the effect of mutual communication and collaborative operation between the monitoring and analysis subsystem, the engineering monitoring subsystem and the tracking monitoring subsystem, and ultimately achieve the intelligent monitoring and analysis effect of civil air defense projects.

[0045] In this embodiment, by collecting the engineering health data of the civil air defense project at the monitoring and analysis points, and evaluating and analyzing the health status of the civil air defense project based on the engineering health data, the multi-dimensional quality data in the civil air defense project can be accurately collected, so as to accurately identify and judge the existing defects such as settlement and cracks in the civil air defense project according to its actual situation. At the same time, by collecting three-dimensional modeling data to construct a civil air defense three-dimensional model, and identifying the settlement and crack areas in the civil air defense three-dimensional model, the actual form and structure of the civil air defense project can be accurately simulated, and the defective areas of the civil air defense project can be automatically, accurately and quickly identified and calculated in the civil air defense three-dimensional model. This can avoid the problems of inefficiency and insufficient precision caused by manual calculation of massive and complicated data one by one, and can also provide accurate data support for the subsequent repair operation of backfill materials in the settlement and crack areas, ensuring that potential settlement and crack defects in the civil air defense project can be comprehensively and accurately identified, thereby achieving high-quality monitoring and analysis effects on the civil air defense project.

[0046] Example 2: Please refer to Figure 2 As shown, the part not described in detail in this embodiment is described in the first embodiment, and a method for monitoring and analyzing the backfilling of civil air defense projects is provided, which is implemented based on a system for monitoring and analyzing the backfilling of civil air defense projects, and includes: S1: Determine the monitoring cycle of the civil air defense project, take the first moment after the corresponding length of a monitoring cycle as the monitoring and analysis point, and collect the engineering health data of the civil air defense project at the monitoring and analysis point; S2: Perform health analysis on the project health data, identify the health status of the civil air defense project at the monitoring and analysis point, and determine whether to perform health repair operations; S3: If the health restoration operation is performed, the modeling collection points that are spaced and bidirectionally distributed in the civil air defense project are marked, and the point cloud data set and image data of the civil air defense project at the modeling collection points are collected to construct a three-dimensional model of the civil air defense; S4: Based on the area recognition criteria, the backfill area is identified in the civil air defense three-dimensional model, and the effective backfill volume of the backfill area is calculated; S5: Establish sampling priorities for the backfill area, conduct sampling analysis on the backfill area based on the sampling priorities, and generate the backfill grade for the civil air defense project.

[0047] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A monitoring and analysis system for backfilling of civil air defense projects, characterized in that: It includes monitoring and analysis subsystem, engineering monitoring subsystem and tracking monitoring subsystem; The monitoring and analysis subsystem includes a monitoring module and an analysis and decision-making module; The monitoring module is used to determine the monitoring period of the civil air defense project, take the first moment after the corresponding length of a monitoring period as the monitoring and analysis point, and collect the engineering health data of the civil air defense project at the monitoring and analysis point; The analysis and decision-making module is used to perform health analysis on the project health data, identify the health status of the civil air defense project at the monitoring and analysis point, and determine whether to perform health repair operations; The engineering monitoring subsystem includes a 3D modeling module and a backfill monitoring module; The three-dimensional modeling module is used to mark the modeling collection points that are spaced and bidirectionally distributed in the civil air defense project, collect the point cloud data set and image data of the civil air defense project at the modeling collection points, and construct a three-dimensional model of the civil air defense; A backfill monitoring module is used to identify the backfill area in the civil air defense three-dimensional model based on the area identification criteria and calculate the effective backfill volume of the backfill area; The tracking and monitoring subsystem includes a sampling and analysis module; The sampling and analysis module is used to formulate the sampling priority of the backfill area, sample and analyze the backfill area according to the sampling priority, and generate the backfill level of the civil air defense project.

2. A monitoring and analysis system for backfilling of civil air defense projects according to claim 1, characterized in that: The method for determining the monitoring period is: The completion time of the civil air defense project is found through the database, and the time between the completion time and the current time is recorded as the completion time, and the Time points of equal duration distribution; Through the database, all humidity sensors in the civil air defense project are queried one by one. The humidity value at each time point is recorded as the maximum humidity value as the effective humidity. effective humidity; Will The effective humidity is accumulated and averaged to obtain the mean humidity value, and the mean humidity value, the maximum effective humidity value and the minimum effective humidity value are added and averaged to obtain the soil humidity value; The earthquake resistance level of the civil air defense project can be queried through the construction drawings, and the earthquake resistance level, construction time and soil moisture value are assigned corresponding proportional coefficients and compared to calculate the monitoring period.

3. The backfill monitoring and analysis system for civil air defense projects according to claim 2 is characterized in that: Engineering health data include settlement concentration rate, crack morphology value and ground water intrusion value; The method for collecting the sedimentation concentration rate is: The indoor ground of the civil air defense project is photographed from above by distributed cameras to obtain B ground images, and the B ground images are stitched together in sequence into a bird's-eye view image according to the orientation of the indoor ground; Based on the preset segmentation length, the top view image is segmented into C subgrids of the same size, and the corner points of the subgrids are recorded as settlement monitoring points, thus obtaining D settlement monitoring points; The real-time settlement values ​​of D settlement monitoring points at the monitoring and analysis point are measured one by one by a vibrating-wire settlement meter, and the original settlement values ​​of D settlement monitoring points at the previous monitoring and analysis point are queried respectively; After subtracting the D real-time settlement values ​​from the corresponding D original settlement values ​​one by one, D settlement difference values ​​are obtained, and the settlement monitoring point whose settlement difference is greater than the calibrated settlement value is recorded as the target settlement point, and the settlement difference value is obtained. target settlement point; Measure the distance between any two target settlement points one by one, add the maximum distance value and the minimum distance value, and then calculate the average to obtain the target length; Respectively Take the target settlement point as the origin and draw a circle with the target length as the radius to obtain Settlement circles are counted one by one. The number of target settlement points within a settlement circle will be The number of target settlement points in each settlement circle is compared with the total number of target settlement points and the average is accumulated to obtain the settlement concentration rate.

4. A system for monitoring and analyzing backfilling of civil air defense projects according to claim 3, characterized in that: The method for collecting crack morphology values ​​is: At the monitoring and analysis point, a video of the wall of the civil air defense project is shot by a camera, and the crack area in the wall video is identified by computer vision technology. The location of the crack area is marked on the wall of the civil air defense project to obtain F crack locations; Outside the F crack positions, the lengths, widths and depths of the F crack regions are measured one by one by distributed FBG sensors, and the lengths, widths and depths of the F crack regions are compared to obtain F sub-morphological values; The calculation formula of sub-pattern value is: ； In the formula, For the The sub-shape value of the crack area, =1,2,...,F, For the The width of the crack area, For the The length of the crack area, For the The depth of the fracture area; Eliminate the sub-morphological values ​​that are less than the calibrated morphological value, and The sub-morphological values ​​are accumulated and averaged to obtain the crack morphological value.

5. The backfill monitoring and analysis system for civil air defense projects according to claim 4 is characterized in that: Health status includes unhealthy, sub-healthy and healthy. The methods to identify unhealthy, sub-healthy and healthy are: When the settlement concentration rate is greater than the settlement safety value, the settlement concentration rate is recorded as pathological data; When the crack morphology value is greater than the crack safety value, the crack morphology value is recorded as pathological data; When the ground water flooding value is greater than the water flooding safety value, the ground water flooding value is recorded as pathological data; Count the number of pathological data in the engineering health data and record it as the pathological value; When the sickness value is 0, the health state is recorded as positive health; When the pathological value is 1, the health status is recorded as sub-health; When the sickness value is 2 or 3, the health state is recorded as unhealthy.

6. The backfill monitoring and analysis system for civil air defense projects according to claim 5 is characterized in that: The method for determining whether to perform a health repair operation is: When the health status of the civil air defense project is positive, it is determined that the health repair operation will not be performed; When the health status of the civil air defense project is sub-healthy or unhealthy, it is determined to perform health repair operations.

7. A monitoring and analysis system for backfilling of civil air defense projects according to claim 6, characterized in that: The method of marking the modeling collection points is: A1: Query the overhead construction drawing of the civil air defense project through the database, draw a line along the location of the outer boundary of the civil air defense project, and draw the project boundary line; A2: Draw a center line that bisects the project boundary line along the entry and exit direction of the civil air defense project, and record the project boundary lines on both sides of the center line as the first boundary and the second boundary respectively; A3: Taking the intersection of the center line and the engineering boundary line as the starting point, mark G sub-collection points and K main collection points at intervals on the first boundary and the second boundary respectively, and arrange 3D laser scanners with opposite scanning directions on the G sub-collection points and the K main collection points respectively; A4: Collect the scanned image of the 3D laser scanner at the first sub-collection point, adjust the position of the first sub-collection point on the first boundary until the scanned image of the first sub-collection point covers the starting point, and record the adjusted first sub-collection point as the first modeling point; A5: Collect the scanned image of the 3D laser scanner at the first mother acquisition point, adjust the position of the first mother acquisition point on the second boundary until the overlapping area of ​​the scanned image of the first mother acquisition point and the scanned image of the first child acquisition point is greater than 35% of the scanned image area of ​​the first child acquisition point, and record the adjusted first mother acquisition point as the second modeling point; A6: Eliminate the first modeling point and the second modeling point respectively, and repeat steps A4-A5 for the remaining sub-collection points and parent collection points until all engineering boundary lines are covered by the scanned image, and obtain T first modeling points and W second modeling points; A7: After summarizing T first modeling points and W second modeling points, S modeling points are obtained, and the S modeling points are marked one by one at the corresponding positions of the civil air defense project to obtain S modeling collection points.

8. The backfill monitoring and analysis system for civil air defense projects according to claim 7 is characterized in that: The method of constructing a three-dimensional model of civil air defense is: The indoor space of the civil air defense project is scanned by a 3D laser scanner at S modeling collection points to obtain S point cloud data sets and S image data; Import the S point cloud data sets into the point cloud processing tool for denoising and filtering, and align all the point clouds in the S point cloud data sets to the same coordinate system using the ICP algorithm; Convert all point clouds in the coordinate system into triangular mesh models, smooth the triangular mesh models, and construct a basic three-dimensional model; The original three-dimensional coordinates of all point clouds in the basic three-dimensional model are queried, the image three-dimensional coordinates that are consistent with the original three-dimensional coordinates are marked in the S image data, and the image features corresponding to the image three-dimensional coordinates are imported into the basic three-dimensional model to construct a civil air defense three-dimensional model.

9. The backfill monitoring and analysis system for civil air defense projects according to claim 8 is characterized in that: The area identification criteria are: the corresponding area where the actual length of the point-to-point connecting line is greater than the calibrated length value is recorded as the backfill area; The method for calculating the effective backfill volume is: Mark all the point clouds in the civil air defense three-dimensional model one by one, and connect any two point clouds in adjacent positions in sequence to obtain L point-to-point connecting lines; Measure the actual lengths of L point-to-point connecting lines one by one, record the point-to-point connecting lines whose actual lengths are greater than the calibrated lengths as regional lines, and record the point clouds at both ends of all regional lines as regional point clouds, and record the remaining point clouds as non-regional point clouds; All non-regional point clouds in the civil air defense three-dimensional model are eliminated, and the regional point clouds in the outer layer and adjacent positions are connected two by two to generate backfill area; Mark them one by one The 3D coordinates of all regional point clouds in the backfill area are obtained, and the 3D coordinates are imported into the volume calculation tool to calculate the volume of the backfill area and record it as the sub-backfill volume; Find out the loss rate of backfill materials and After the backfill volumes of each item are accumulated one by one and combined with the loss rate of the backfill material, the effective backfill volume is calculated; The calculation formula for effective backfill volume is: ； In the formula, is the effective backfill volume, For the The amount of sub-backfill in the backfill area, is the loss rate of backfill material.

10. A monitoring and analysis system for backfilling of civil air defense projects according to claim 9, characterized in that: The sampling priority is: the larger the priority value of the backfill area, the earlier the sampling order of the backfill area; The sampling and analysis methods for the backfill area are: Mark the point cloud of the entrance and exit positions of the civil air defense project in the civil air defense three-dimensional model, and record the point cloud in the middle as the entrance and exit point cloud, and measure them one by one. The distance from the backfill area to the import and export point cloud is obtained Sampling distance value; Will The sampling distance values ​​and After assigning different proportional coefficients to each sub-backfill amount and adding them together, we get priority value; According to the priority value from large to small, The backfill area was sampled and the Backfill samples; Backfill grades include qualified grades and unqualified grades.

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