Tower type ancient building deformation monitoring system and method

Abstract

According to the tower type historic building deformation monitoring system and method, three-dimensional space point cloud data of the bottommost layer and the topmost layer of a tower type historic building are scanned, detected and analyzed, corresponding datum structure space information is obtained, and the bottommost layer and the topmost layer serve as references for subsequent deformation degree calibration; scanning detection does not need to be carried out on all floors of the tower-type historic building, and the detection operation amount and the point cloud data calculation amount are reduced; performing dynamic shooting and analysis on each subordinate layer of the tower-type ancient building to obtain attitude change information of each layer, determining spatial deviation information of each layer in combination with reference structure spatial information, and rapidly determining a spatial deviation state of each layer through dynamic visual identification; and on the basis of the spatial offset information, component visual identification is carried out on the interior of the corresponding layer, relative state information of all components is obtained, then structural deformation information of the corresponding layer is obtained, refined deformation identification is carried out on each layer of the tower-type ancient building, and the credibility and accuracy of deformation monitoring are improved.

Description

Technical Field

[0001] The present invention relates to the field of building monitoring, and particularly to a deformation monitoring system and method for tower-type ancient buildings. Background Art

[0002] Tower-type ancient buildings are composed of column members, beam members and mortise-tenon members to form a multi-layer frame structure. Under the influence of different types of natural disasters such as storms and earthquakes, the frame structure of tower-type ancient buildings will inevitably shift or be damaged, making it impossible for the components inside the tower-type ancient buildings to maintain the original force balance state. When the components are continuously in an unbalanced force state for a long time, irreversible torsional deformation will occur, which in turn will exacerbate the degree of displacement or misalignment inside the frame structure of the tower-type ancient building, making it impossible for the tower-type ancient building to restore the original structural stability state. In order to accurately and effectively detect the structural deformation of tower-type ancient buildings, the existing technology uses three-dimensional laser point cloud scanning to scan and detect each layer of the tower-type ancient building one by one. The above method can achieve global and refined deformation detection of the tower-type ancient building, but it requires a large amount of manpower and time to perform three-dimensional laser scanning operations on each layer of the tower-type ancient building. At the same time, a large amount of three-dimensional laser point cloud data obtained by scanning also requires a large amount of computing workload, and it is impossible to balance the comprehensive and accurate detection of the deformation of the tower-type ancient building and the low-workload and convenient detection. Summary of the Invention

[0003] The purpose of the present invention is to provide a deformation monitoring system and method for tower-type ancient buildings, which scan and detect the three-dimensional spatial point cloud data of the bottommost and topmost layers of the tower-type ancient building to obtain the corresponding reference structural spatial information, and use the bottommost and topmost layers as the reference benchmarks for subsequent calibration of the deformation degree, without the need to scan and detect all layers of the tower-type ancient building, reducing the detection operation volume and the computing volume of the point cloud data; dynamically photograph and analyze each layer under the tower-type ancient building to obtain the attitude change information of each layer, and combine the reference structural spatial information to determine the spatial offset information of each layer, and quickly determine the spatial offset state of each layer through dynamic vision recognition; also based on the spatial offset information, perform component vision recognition on the interior of the corresponding layer to obtain the relative state information of all components, and then obtain the structural deformation information of the corresponding layer, perform refined deformation recognition on each layer of the tower-type ancient building, improve the credibility and accuracy of deformation monitoring, and balance the comprehensive and accurate detection of the deformation of the tower-type ancient building and the low-workload and convenient detection.

[0004] The present invention is realized by the following technical solutions:

[0005] A deformation monitoring system for tower-type ancient buildings, comprising:

[0006] A scanning detection module, configured to perform scanning detection on the bottommost layer and the topmost layer of the tower-shaped ancient building respectively, so as to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively;

[0007] A spatial point cloud analysis module, configured to analyze the three-dimensional spatial point cloud data to generate the reference structure spatial information of the tower-shaped ancient building;

[0008] A dynamic shooting and analysis module, configured to perform dynamic shooting on the tower-shaped ancient building to obtain the dynamic panoramic images of each layer subordinate to the tower-shaped ancient building; analyze the dynamic panoramic images to obtain the attitude change information of each layer subordinate to the tower-shaped ancient building;

[0009] A spatial offset determination module, configured to determine the spatial offset information of each layer subordinate to the tower-shaped ancient building based on the reference structure spatial information and the attitude change information;

[0010] An intra-layer component visual recognition module, configured to perform component visual recognition on the interior of the corresponding layer of the tower-shaped ancient building based on the spatial offset information to obtain the relative state information of all components inside the corresponding layer;

[0011] A structure deformation determination and alarm module, configured to obtain the structure deformation information of the corresponding layer based on the relative state information, and perform alarm notification based on the structure deformation information of each layer subordinate to the tower-shaped ancient building.

[0012] Optionally, the scanning detection module is configured to perform scanning detection on the bottommost layer and the topmost layer of the tower-shaped ancient building respectively, so as to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively, including:

[0013] Performing three-dimensional laser scanning detection on the bottommost layer and the topmost layer of the tower-shaped ancient building synchronously to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively; screening the three-dimensional spatial point cloud data based on the contour information of the bottommost layer and the topmost layer to obtain the corresponding three-dimensional spatial point cloud feature data;

[0014] The spatial point cloud analysis module is configured to analyze the three-dimensional spatial point cloud data to generate the reference structure spatial information of the tower-shaped ancient building, including:

[0015] Analyzing the three-dimensional spatial point cloud feature data to obtain the spatial coordinate information of the feature points of the bottommost layer and the topmost layer respectively; generating the respective architecture edge spatial information of the bottommost layer and the topmost layer of the tower-shaped ancient building in the world coordinate system based on the spatial coordinate information of the feature points, and using this as the reference structure spatial information.

[0016] Optionally, the dynamic shooting and analysis module is used to dynamically shoot the tower ancient building to obtain the dynamic panoramic images of each floor under the tower ancient building; analyze the dynamic panoramic images to obtain the posture change information of each floor under the tower ancient building, including:

[0017] Dynamically scan and shoot each floor under the tower ancient building to obtain the dynamic panoramic images of each floor under the tower ancient building; perform frame processing on the dynamic panoramic images to obtain a number of picture frames; perform pixel contour recognition processing on each picture frame to obtain the edge contour feature information of each floor of the tower ancient building; perform time evolution analysis on the edge contour feature information corresponding to all the picture frames under the dynamic panoramic images to obtain the posture change information of each floor under the tower ancient building;

[0018] The space offset determination module is used to determine the space offset information of each floor under the tower ancient building based on the reference structure space information and the posture change information, including:

[0019] Compare the posture change information of the bottommost and topmost floors of the tower ancient building with the reference structure space information to obtain the space offset information of the bottommost and topmost floors of the tower ancient building in the world coordinate system respectively; based on the space offset information of the bottommost and topmost floors respectively, perform conversion and correction on the space offset direction and space offset amount of the posture change information of each of the other floors under the tower ancient building except the bottommost and topmost floors to obtain the space offset information of each of the other floors.

[0020] Optionally, the in-layer component visual recognition module is used to perform component visual recognition on the interior of the corresponding floor of the tower ancient building based on the space offset information to obtain the relative state information of all components inside the corresponding floor, including:

[0021] Based on the space offset information of each floor of the tower ancient building, identify the corresponding floors where the center of gravity offset imbalance event will occur; perform visual recognition of column components and beam components on the interior of the corresponding floors where the center of gravity offset imbalance event will occur to obtain the relative position change information and relative orientation change information between all the column components and all the beam components inside the corresponding floors.

[0022] The structure deformation determination and alarm module is used to obtain the structure deformation information of the corresponding floor based on the relative state information, and perform alarm notification based on the structure deformation information of each floor under the tower ancient building, including:

[0023] Based on the relative position change information and the relative orientation change information, perform structural deformation fitting on the column-beam framework of the corresponding layer to obtain the structural deformation information of the corresponding layer; based on the structural deformation information of each layer of the tower ancient building, perform cumulative analysis of the structural deformation of the entire tower ancient building, so as to judge whether the tower ancient building has exceeded its own structural deformation limit that it can withstand, and thus issue an alarm notification according to the corresponding judgment result.

[0024] A deformation monitoring method for a tower ancient building, comprising:

[0025] Perform scanning detection on the bottommost layer and the topmost layer of the tower ancient building respectively to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively; analyze the three-dimensional spatial point cloud data to generate the reference structural spatial information of the tower ancient building.

[0026] Perform dynamic shooting on the tower ancient building to obtain the dynamic panoramic images of each layer of the tower ancient building; analyze the dynamic panoramic images to obtain the attitude change information of each layer of the tower ancient building; based on the reference structural spatial information and the attitude change information, determine the spatial offset information of each layer of the tower ancient building.

[0027] Based on the spatial offset information, perform component visual recognition on the interior of the corresponding layer of the tower ancient building to obtain the relative state information of all components inside the corresponding layer; based on the relative state information, obtain the structural deformation information of the corresponding layer, and issue an alarm notification based on the structural deformation information of each layer of the tower ancient building.

[0028] Optionally, performing scanning detection on the bottommost layer and the topmost layer of the tower ancient building respectively to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively; analyzing the three-dimensional spatial point cloud data to generate the reference structural spatial information of the tower ancient building includes:

[0029] Perform three-dimensional laser scanning detection on the bottommost layer and the topmost layer of the tower ancient building simultaneously to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively; based on the external contour information of the bottommost layer and the topmost layer, screen the three-dimensional spatial point cloud data to obtain the corresponding three-dimensional spatial point cloud feature data.

[0030] Analyze the three-dimensional spatial point cloud feature data to obtain the spatial coordinate information of the feature points of the bottommost layer and the topmost layer respectively; based on the spatial coordinate information of the feature points, generate the respective architectural edge spatial information of the bottommost layer and the topmost layer of the tower ancient building in the world coordinate system, and use this as the reference structural spatial information.

[0031] Optionally, perform dynamic shooting on the tower-shaped ancient building to obtain the dynamic panoramic images of each floor under the tower-shaped ancient building; analyze the dynamic panoramic images to obtain the attitude change information of each floor under the tower-shaped ancient building; based on the reference structure space information and the attitude change information, determine the space offset information of each floor under the tower-shaped ancient building, including:

[0032] Perform dynamic scanning shooting on each floor under the tower-shaped ancient building respectively to obtain the dynamic panoramic images of each floor under the tower-shaped ancient building; perform frame processing on the dynamic panoramic images to obtain a number of picture frames; perform pixel contour recognition processing on each picture frame to obtain the edge contour feature information of each floor of the tower-shaped ancient building; perform time evolution analysis on the edge contour feature information corresponding to all the picture frames under the dynamic panoramic images to obtain the attitude change information of each floor under the tower-shaped ancient building;

[0033] Compare the attitude change information of the bottommost and topmost floors of the tower-shaped ancient building with the reference structure space information respectively to obtain the space offset information of the bottommost and topmost floors of the tower-shaped ancient building in the world coordinate system respectively; based on the space offset information of the bottommost and topmost floors respectively, perform conversion and correction on the space offset direction and space offset amount of the attitude change information of each of the other floors under the tower-shaped ancient building except the bottommost and topmost floors to obtain the space offset information of each of the other floors.

[0034] Optionally, perform time evolution analysis on the edge contour feature information corresponding to all the picture frames under the dynamic panoramic images to obtain the attitude change information of each floor under the tower-shaped ancient building, including:

[0035] Step S1, assume that the set composed of the edge contour feature information corresponding to the i-th frame of a certain floor is D i , then the feature matching pairs between the i-th frame and the (i + 1)-th frame are:

[0036] M i,i+1 = MatchDescriptors(D i , D i+1 ) (1)

[0037] In the above formula (1), M i,i+1 is the feature matching pair between the i-th frame and the (i + 1)-th frame, and MatchDescriptors is a general function for matching the features of two images;

[0038] Step S2, assume that is the coordinate of the k-th matching feature point in the i-th frame, then the average displacement vector from the i-th frame to the (i + 1)-th frame is:

[0039]

[0040] In the above formula (2), is the average displacement vector from the i-th frame to the (i + 1)-th frame;

[0041] Step S3, according to the calculation result of the above step S2, determine the cumulative average displacement vector up to the i-th frame to quantify the pose change of a certain layer.

[0042]

[0043] In the above formula (3), T i is the cumulative average displacement vector up to the i-th frame, that is, the pose change situation of a certain layer measured up to the i-th frame, which includes the displacement magnitude and direction; both i and j are positive integers.

[0044] Optionally, based on the spatial offset information, perform component visual recognition on the interior of the corresponding layer of the tower-shaped ancient building to obtain the relative state information of all components inside the corresponding layer; based on the relative state information, obtain the structural deformation information of the corresponding layer, and based on the structural deformation information of each layer under the tower-shaped ancient building, perform alarm notification, including:

[0045] Based on the spatial offset information of each layer of the tower-shaped ancient building, identify the corresponding layer where the center-of-gravity offset imbalance event will occur; perform visual recognition on the column components and beam components inside the corresponding layer where the center-of-gravity offset imbalance event will occur to obtain the relative position change information and relative orientation change information between all column components and all beam components inside the corresponding layer;

[0046] Based on the relative position change information and the relative orientation change information, perform structural deformation fitting on the column-beam framework of the corresponding layer to obtain the structural deformation information of the corresponding layer; based on the structural deformation information of each layer under the tower-shaped ancient building, perform cumulative analysis of the structural deformation of the entire tower-shaped ancient building to determine whether the tower-shaped ancient building has exceeded its own tolerable structural deformation limit, and thus perform alarm notification according to the corresponding judgment result.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] A deformation monitoring system and method for tower ancient buildings provided by the present application scan and detect the three-dimensional spatial point cloud data of the bottommost and topmost layers of the tower ancient buildings to obtain the corresponding reference structure spatial information, and use the bottommost and topmost layers as the reference benchmarks for subsequent calibration of the deformation degree, without the need to scan and detect all layers of the tower ancient buildings, reducing the detection operation volume and the point cloud data operation volume; dynamically photograph and analyze each layer under the tower ancient building to obtain the attitude change information of each layer, and combine the reference structure spatial information to determine the spatial offset information of each layer, and quickly determine the spatial offset state of each layer through dynamic vision recognition; also based on the spatial offset information, conduct component vision recognition inside the corresponding layer to obtain the relative state information of all components, and then obtain the structural deformation information of the corresponding layer, conduct refined deformation recognition on each layer of the tower ancient building, improve the credibility and accuracy of deformation monitoring, and take into account the comprehensive and accurate detection of the deformation of the tower ancient building and the convenient detection with low workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0050] Figure 1 FIG. is a schematic structural diagram of a deformation monitoring system for tower ancient buildings provided by the present invention.

[0051] Figure 2 FIG. is a schematic flowchart of a deformation monitoring method for tower ancient buildings provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] In order to make the above-mentioned objects, features, and advantages of the present application more obvious and understandable, the following will make a detailed description of the specific embodiments of the present application in conjunction with the drawings. It can be understood that the specific embodiments described here are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that for the sake of description, only some parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0053] The term "comprising" and "having" in this application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0054] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] Please refer to Figure 1 As shown, a deformation monitoring system for a tower-shaped ancient building provided by an embodiment of the present application. The deformation monitoring system for the tower-shaped ancient building includes:

[0056] A scanning detection module for respectively scanning and detecting the bottommost layer and the topmost layer of the tower-shaped ancient building to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively;

[0057] A spatial point cloud analysis module for analyzing the three-dimensional spatial point cloud data to generate the reference structure spatial information of the tower-shaped ancient building;

[0058] A dynamic shooting and analysis module for dynamically shooting the tower-shaped ancient building to obtain the dynamic panoramic images of each layer under the tower-shaped ancient building; analyzing the dynamic panoramic images to obtain the attitude change information of each layer under the tower-shaped ancient building;

[0059] A spatial offset determination module for determining the spatial offset information of each layer under the tower-shaped ancient building based on the reference structure spatial information and the attitude change information;

[0060] An in-layer component visual recognition module for performing component visual recognition on the interior of the corresponding layer of the tower-shaped ancient building based on the spatial offset information to obtain the relative state information of all components inside the corresponding layer;

[0061] A structure deformation determination and alarm module for obtaining the structure deformation information of the corresponding layer based on the relative state information, and performing alarm notification based on the structure deformation information of each layer under the tower-shaped ancient building.

[0062] Beneficial effects of the above embodiments: The deformation monitoring system for the ancient tower-shaped building scans and detects the three-dimensional spatial point cloud data of the bottommost and topmost layers of the ancient tower-shaped building, obtains the corresponding reference structure spatial information, uses the bottommost and topmost layers as the reference benchmarks for subsequent calibration of the deformation degree, and does not require scanning and detecting all layers of the ancient tower-shaped building, reducing the detection operation volume and the point cloud data operation volume; dynamically shoots and analyzes each layer under the ancient tower-shaped building, obtains the attitude change information of each layer, and combines the reference structure spatial information to determine the spatial offset information of each layer, and quickly determines the spatial offset state of each layer through dynamic visual recognition; also based on the spatial offset information, conducts component visual recognition on the interior of the corresponding layer, obtains the relative state information of all components, and then obtains the structural deformation information of the corresponding layer, conducts refined deformation recognition on each layer of the ancient tower-shaped building, improves the credibility and accuracy of deformation monitoring, and takes into account the comprehensive and accurate detection of the deformation of the ancient tower-shaped building and the convenient detection with low workload.

[0063] In another embodiment, the scanning and detection module is used to respectively scan and detect the bottommost and topmost layers of the ancient tower-shaped building, and obtain the three-dimensional spatial point cloud data of the bottommost and topmost layers respectively, including:

[0064] Synchronously conduct three-dimensional laser scanning detection on the bottommost and topmost layers of the ancient tower-shaped building, and obtain the three-dimensional spatial point cloud data of the bottommost and topmost layers respectively; based on the contour information of the bottommost and topmost layers, screen the three-dimensional spatial point cloud data to obtain the corresponding three-dimensional spatial point cloud feature data;

[0065] The spatial point cloud analysis module is used to analyze the three-dimensional spatial point cloud data and generate the reference structure spatial information of the ancient tower-shaped building, including:

[0066] Analyze the three-dimensional spatial point cloud feature data to obtain the spatial coordinate information of the feature points of the bottommost and topmost layers respectively; based on the spatial coordinate information of the feature points, generate the respective architectural edge spatial information of the bottommost and topmost layers of the ancient tower-shaped building in the world coordinate system, and use this as the reference structure spatial information.

[0067] The beneficial effects of the above embodiments are as follows. The tower-shaped ancient building includes multiple layers of wooden structures. The wooden structures at the bottommost and topmost layers are vulnerable to geological disasters (such as earthquakes or landslides) and atmospheric disasters (severe convective weather or typhoons). If structural deformation occurs in the tower-shaped ancient building, it is inevitable that the bottommost and / or topmost layers will experience structural deformation first. To comprehensively detect the spatial structures of the bottommost and topmost layers of the tower-shaped ancient building, three-dimensional laser scanning detection is simultaneously performed on the bottommost and topmost layers of the tower-shaped ancient building to obtain the three-dimensional spatial point cloud data of each of the bottommost and topmost layers. This can comprehensively calibrate the initial structural state of the tower-shaped ancient building, provide a reference benchmark for determining the offset state of each subsequent layer of the tower-shaped ancient building, and at the same time, it is not necessary to perform three-dimensional laser scanning detection on all layers of the tower-shaped ancient building, reducing the workload of three-dimensional laser scanning detection and the computational amount of three-dimensional spatial point cloud data. In addition, the three-dimensional spatial point cloud data of the bottommost and topmost layers includes the three-dimensional spatial point cloud data corresponding to the external contour points of the bottommost and topmost layers. To effectively reduce the amount of point cloud data without changing the credibility of the three-dimensional spatial point cloud data, based on the external contour information of the bottommost and topmost layers, the three-dimensional spatial point cloud data is screened, and the point cloud data corresponding to the key external contour points (such as corner points) of the bottommost and topmost layers is retained, thereby obtaining the corresponding three-dimensional spatial point cloud feature data. Further, the three-dimensional spatial point cloud feature data is analyzed to obtain the spatial coordinate information of the feature points of each of the bottommost and topmost layers, and based on this, the respective architectural edge spatial information of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system is generated. This can three-dimensionally represent the architectural edge shapes of the bottommost and topmost layers of the tower-shaped ancient building, providing a reference benchmark for determining the offset of each subsequent layer of the tower-shaped ancient building.

[0068] In another embodiment, the dynamic shooting and analysis module is used to dynamically shoot the tower-shaped ancient building to obtain the dynamic panoramic images of each subsequent layer of the tower-shaped ancient building; analyze the dynamic panoramic images to obtain the attitude change information of each subsequent layer of the tower-shaped ancient building, including:

[0069] Dynamically scan and shoot each subsequent layer of the tower-shaped ancient building to obtain the dynamic panoramic images of each subsequent layer of the tower-shaped ancient building; perform frame processing on the dynamic panoramic images to obtain a number of picture frames; perform pixel contour recognition processing on each picture frame to obtain the edge contour feature information of each layer of the tower-shaped ancient building; perform time evolution analysis on the edge contour feature information corresponding to all the picture frames of the dynamic panoramic images to obtain the attitude change information of each subsequent layer of the tower-shaped ancient building;

[0070] The spatial offset determination module is used to determine the spatial offset information of each subsequent layer of the tower-shaped ancient building based on the reference structural spatial information and the attitude change information, including:

[0071] Compare the attitude change information of the bottommost and topmost layers of the tower-shaped ancient building with the reference structure space information respectively to obtain the spatial offset information of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system; based on the spatial offset information of the bottommost and topmost layers, convert and correct the attitude change information of each layer other than the bottommost and topmost layers of the tower-shaped ancient building in terms of the spatial offset direction and spatial offset amount to obtain the spatial offset information of each other layer.

[0072] The beneficial effects of the above embodiments are as follows: when the tower-shaped ancient building undergoes structural deformation, the corresponding structural deformation states (such as the deformation amount and deformation direction) of each layer of the tower-shaped ancient building are obtained. In order to quickly and comprehensively identify the attitude changes of each layer of the tower-shaped ancient building, each layer of the tower-shaped ancient building is dynamically scanned and photographed separately to obtain the dynamic panoramic images of each layer of the tower-shaped ancient building. Then, through image frame processing, picture pixel contour recognition processing and time evolution analysis, the attitude change information of each layer of the tower-shaped ancient building is obtained, realizing the characterization of the overall attitude change of each layer of the tower-shaped ancient building. In addition, compare the attitude change information of the bottommost and topmost layers of the tower-shaped ancient building with the reference structure space information respectively. Taking the bottommost and topmost layers of the tower-shaped ancient building as objects, compare the attitude change information with the reference structure space information to obtain the spatial offset information of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system, so as to quantitatively characterize the earliest offset degree of the bottommost and topmost layers during the structural deformation of the tower-shaped ancient building. And taking the spatial offset information of the bottommost and topmost layers as the offset reference starting points, convert and correct the attitude change information of each layer other than the bottommost and topmost layers of the tower-shaped ancient building in terms of the spatial offset direction and spatial offset amount to obtain the spatial offset information of each other layer. In this way, the spatial offset information of each other layer of the tower-shaped ancient building can be accurately determined on the premise of considering the interaction between all layers of the tower-shaped ancient building.

[0073] In another embodiment, the in-layer component visual recognition module is used to perform component visual recognition on the interior of the corresponding layer of the tower-shaped ancient building based on the spatial offset information to obtain the relative state information of all components inside the corresponding layer, including:

[0074] Based on the spatial offset information of each layer of the tower-shaped ancient building, identify the corresponding layer where the center-of-gravity offset imbalance event will occur; perform visual recognition on the column components and beam components inside the corresponding layer where the center-of-gravity offset imbalance event will occur to obtain the relative position change information and relative orientation change information between all column components and all beam components inside the corresponding layer.

[0075] The structure deformation determination and alarm module is used to obtain the structure deformation information of the corresponding layer based on the relative state information, and perform alarm notifications based on the structure deformation information of each layer under the tower-shaped ancient building, including:

[0076] Perform structural deformation fitting on the column-beam framework of the corresponding layer based on the relative position change information and the relative orientation change information to obtain the structural deformation information of the corresponding layer; based on the structural deformation information of each layer under the tower-shaped ancient building, perform cumulative analysis of the structural deformation of the entire tower-shaped ancient building, so as to judge whether the tower-shaped ancient building has exceeded the limit of its own tolerable structural deformation, and thus perform alarm notifications according to the corresponding judgment results.

[0077] The beneficial effects of the above embodiments are as follows. Based on the spatial offset information of each layer of the tower-shaped ancient building, identify the corresponding layer where the center-of-gravity offset imbalance event will occur, that is, based on the spatial offset information, determine the center-of-gravity offset swing amount of each layer. If the center-of-gravity offset swing amount exceeds the preset swing amount threshold, it is determined that the corresponding layer will have a center-of-gravity offset imbalance event; otherwise, it is determined that the corresponding layer will not have a center-of-gravity offset imbalance event. Then, perform visual recognition on the column members and beam members inside the corresponding layer where the center-of-gravity offset imbalance event will occur to obtain the relative position change information and relative orientation change information between all the column members and all the beam members inside the corresponding layer, so as to quantitatively characterize the relative position changes and relative orientation changes between different column members, different beam members, and between column members and beam members inside the corresponding layer. Also, perform structural deformation fitting on the column-beam framework of the corresponding layer based on the relative position change information and the relative orientation change information to obtain the structural deformation information of the corresponding layer, and perform cumulative analysis on the structural deformation information of all layers of the tower-shaped ancient building, so as to judge whether the tower-shaped ancient building has exceeded the limit of its own tolerable structural deformation, and thus perform alarm notifications according to the corresponding judgment results. In this way, the credibility and accuracy of deformation monitoring can be improved, and global and timely deformation monitoring and early warning of the tower-shaped ancient building can be realized.

[0078] Please refer to Figure 2 As shown, a deformation monitoring method for a tower-shaped ancient building provided by an embodiment of the present application. The deformation monitoring method for the tower-shaped ancient building includes:

[0079] Perform scanning detection on the bottommost layer and the topmost layer of the tower-shaped ancient building respectively to obtain the three-dimensional spatial point cloud data of the bottommost layer and the topmost layer respectively; analyze the three-dimensional spatial point cloud data to generate the reference structural spatial information of the tower-shaped ancient building;

[0080] Dynamically photograph the tower - type ancient building to obtain the dynamic panoramic images of each floor under the tower - type ancient building; analyze the dynamic panoramic images to obtain the attitude change information of each floor under the tower - type ancient building; based on the reference structure space information and the attitude change information, determine the spatial offset information of each floor under the tower - type ancient building;

[0081] Based on the spatial offset information, conduct component visual recognition on the interior of the corresponding floor of the tower - type ancient building to obtain the relative state information of all components inside the corresponding floor; based on the relative state information, obtain the structural deformation information of the corresponding floor, and based on the structural deformation information of each floor under the tower - type ancient building, issue an alarm notification.

[0082] The beneficial effects of the above - mentioned embodiment: The deformation monitoring method of the tower - type ancient building scans and analyzes the three - dimensional spatial point cloud data of the bottommost and topmost floors of the tower - type ancient building to obtain the corresponding reference structure space information, using the bottommost and topmost floors as the reference benchmarks for subsequent calibration of the deformation degree, without the need to scan and detect all floors of the tower - type ancient building, reducing the detection operation volume and the point cloud data calculation volume; dynamically photograph and analyze each floor under the tower - type ancient building to obtain the attitude change information of each floor, and combined with the reference structure space information, determine the spatial offset information of each floor, quickly determining the spatial offset state of each floor through dynamic visual recognition; also based on the spatial offset information, conduct component visual recognition on the interior of the corresponding floor to obtain the relative state information of all components, and then obtain the structural deformation information of the corresponding floor, conducting refined deformation recognition on each floor of the tower - type ancient building, improving the credibility and accuracy of deformation monitoring, and taking into account the comprehensive and accurate detection of the deformation situation of the tower - type ancient building and the convenient detection with low workload.

[0083] In another embodiment, scan and detect the bottommost and topmost floors of the tower - type ancient building respectively to obtain the three - dimensional spatial point cloud data of the bottommost and topmost floors; analyze the three - dimensional spatial point cloud data to generate the reference structure space information of the tower - type ancient building, including:

[0084] Conduct three - dimensional laser scanning detection on the bottommost and topmost floors of the tower - type ancient building simultaneously to obtain the three - dimensional spatial point cloud data of the bottommost and topmost floors; based on the contour information of the bottommost and topmost floors, screen the three - dimensional spatial point cloud data to obtain the corresponding three - dimensional spatial point cloud feature data;

[0085] Analyze the three - dimensional spatial point cloud feature data to obtain the spatial coordinate information of the feature points of the bottommost and topmost floors respectively; based on the spatial coordinate information of the feature points, generate the respective architectural edge space information of the bottommost and topmost floors of the tower - type ancient building in the world coordinate system, and use this as the reference structure space information.

[0086] The beneficial effects of the above embodiments are as follows. The tower-shaped ancient building includes multiple layers of wooden structures. The wooden structures at the bottommost and topmost layers are vulnerable to geological disasters (such as earthquakes or landslides) and atmospheric disasters (severe convective weather or typhoons). If the tower-shaped ancient building undergoes structural deformation, it will inevitably occur first at the bottommost and / or topmost layers. To comprehensively detect the spatial structures of the bottommost and topmost layers of the tower-shaped ancient building, three-dimensional laser scanning detection is simultaneously performed on the bottommost and topmost layers of the tower-shaped ancient building to obtain the three-dimensional spatial point cloud data of each of the bottommost and topmost layers. This can comprehensively calibrate the initial structural state of the tower-shaped ancient building, provide a reference benchmark for determining the offset state of each layer of the tower-shaped ancient building subsequently, and at the same time, it is not necessary to perform three-dimensional laser scanning detection on all layers of the tower-shaped ancient building, reducing the workload of three-dimensional laser scanning detection and the computational amount of three-dimensional spatial point cloud data. In addition, the three-dimensional spatial point cloud data of the bottommost and topmost layers includes the three-dimensional spatial point cloud data corresponding to the external contour points of the bottommost and topmost layers. To effectively reduce the amount of point cloud data without changing the credibility of the three-dimensional spatial point cloud data, based on the external contour information of the bottommost and topmost layers, the three-dimensional spatial point cloud data is screened, and the point cloud data corresponding to the key external contour points (such as corner points) of the bottommost and topmost layers is retained, thereby obtaining the corresponding three-dimensional spatial point cloud feature data. Further, the three-dimensional spatial point cloud feature data is analyzed to obtain the spatial coordinate information of the feature points of each of the bottommost and topmost layers, and based on this, the architectural edge spatial information of each of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system is generated. This can three-dimensionally represent the architectural edge shapes of the bottommost and topmost layers of the tower-shaped ancient building, providing a reference benchmark for determining the offset of each subsequent layer of the tower-shaped ancient building.

[0087] In another embodiment, the tower-shaped ancient building is dynamically photographed to obtain the dynamic panoramic images of each layer of the tower-shaped ancient building; the dynamic panoramic images are analyzed to obtain the attitude change information of each layer of the tower-shaped ancient building; based on the reference structural spatial information and the attitude change information, the spatial offset information of each layer of the tower-shaped ancient building is determined, including:

[0088] The tower-shaped ancient building is dynamically scanned and photographed layer by layer to obtain the dynamic panoramic images of each layer of the tower-shaped ancient building; the dynamic panoramic images are frame-processed to obtain a number of frame images; pixel contour recognition processing is performed on each frame image to obtain the edge contour feature information of each layer of the tower-shaped ancient building; time evolution analysis is performed on the edge contour feature information corresponding to all the frame images of the dynamic panoramic images to obtain the attitude change information of each layer of the tower-shaped ancient building;

[0089] Compare the attitude change information of the bottommost and topmost layers of the tower-shaped ancient building with the reference structure space information respectively to obtain the spatial offset information of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system; based on the spatial offset information of the bottommost and topmost layers, convert and correct the attitude change information of each layer other than the bottommost and topmost layers of the tower-shaped ancient building in terms of the spatial offset direction and spatial offset amount, so as to obtain the spatial offset information of each other layer.

[0090] The beneficial effects of the above embodiments are as follows. When the structure of the tower-shaped ancient building deforms, for the corresponding structural deformation states (such as the amount of deformation and the direction of deformation) of each layer of the tower-shaped ancient building, in order to quickly and comprehensively identify the attitude changes occurring in each layer of the tower-shaped ancient building, each layer of the tower-shaped ancient building is dynamically scanned and photographed separately to obtain the dynamic panoramic images of each layer of the tower-shaped ancient building. Then, through image frame-by-frame processing, picture pixel contour recognition processing and time evolution analysis, the attitude change information of each layer of the tower-shaped ancient building is obtained, so as to realize the characterization of the overall attitude change of each layer of the tower-shaped ancient building. In addition, compare the attitude change information of the bottommost and topmost layers of the tower-shaped ancient building with the reference structure space information respectively. Taking the bottommost and topmost layers of the tower-shaped ancient building as objects, compare the attitude change information with the reference structure space information to obtain the spatial offset information of the bottommost and topmost layers of the tower-shaped ancient building in the world coordinate system, so as to quantitatively characterize the earliest offset degree of the bottommost and topmost layers during the structural deformation process of the tower-shaped ancient building. And taking the spatial offset information of the bottommost and topmost layers as the offset reference starting point, convert and correct the attitude change information of each layer other than the bottommost and topmost layers of the tower-shaped ancient building in terms of the spatial offset direction and spatial offset amount, so as to obtain the spatial offset information of each other layer. In this way, the spatial offset information of each other layer of the tower-shaped ancient building can be accurately determined on the premise of considering the interaction between all layers of the tower-shaped ancient building.

[0091] In another embodiment, perform time evolution analysis on the edge contour feature information corresponding to all the picture frames of the dynamic panoramic image to obtain the attitude change information of each layer of the tower-shaped ancient building, including:

[0092] Step S1, set the set composed of the edge contour feature information corresponding to the i-th frame of a certain layer as D i , then the feature matching pairs between the i-th frame and the frames before the i + 1-th frame are:

[0093] M i,i+1 = MatchDescriptors(D i , D i+1 ) (1)

[0094] In the above formula (1), M i,i+1 is the feature matching pair before the i-th frame and the (i + 1)-th frame. MatchDescriptors is a general function for matching the features of two images. It is a general function in the fields of computer vision and image processing and will not be introduced in detail here;

[0095] Step S2, let be the coordinates of the k-th matching feature point in the i-th frame. Then the average displacement vector from the i-th frame to the (i + 1)-th frame is:

[0096]

[0097] In the above formula (2), is the average displacement vector from the i-th frame to the (i + 1)-th frame;

[0098] Step S3, according to the calculation result of the above step S2, determine the cumulative average displacement vector up to the i-th frame to quantify the pose change of a certain layer.

[0099]

[0100] In the above formula (3), T i is the cumulative average displacement vector up to the i-th frame, that is, the pose change situation of a certain layer measured up to the i-th frame, which includes the displacement magnitude and direction; both i and j are positive integers.

[0101] The beneficial effects of the above embodiments are as follows. Since the dynamic panoramic image reflects the position change of the edge contour of each layer of the tower-shaped ancient building in the three-dimensional space within the corresponding time period, and each frame represents the position of the edge contour of each layer of the tower-shaped ancient building in the three-dimensional space at the corresponding time point. Associating the edge contour feature information corresponding to all the frames under the same dynamic panoramic image with time variation to obtain the pose change information of each layer is the key to determining the spatial offset information of each layer under the tower-shaped ancient building. Whether it is correct or not directly affects the accuracy of the subsequent deformation monitoring of the tower-shaped ancient building; the pose change information of the target layer is accurately calculated based on the edge contour feature information of consecutive frames, so as to obtain the pose change information of each layer, providing an accurate basis for determining the spatial offset information of each layer under the tower-shaped ancient building.

[0102] In another embodiment, based on the spatial offset information, perform component visual recognition on the corresponding layer inside the tower-shaped ancient building to obtain the relative state information of all components inside the corresponding layer; based on the relative state information, obtain the structural deformation information of the corresponding layer, and based on the structural deformation information of each layer under the tower-shaped ancient building, issue an alarm notification, including:

[0103] Based on the spatial offset information of each floor of the tower-shaped ancient building, identify the corresponding floors where the center-of-gravity offset imbalance events will occur; conduct visual recognition of the column members and beam members inside the corresponding floors where the center-of-gravity offset imbalance events will occur, and obtain the relative position change information and relative orientation change information among all the column members and all the beam members inside the corresponding floors.

[0104] Based on the relative position change information and the relative orientation change information, perform structural deformation fitting on the column-beam framework of the corresponding floor to obtain the structural deformation information of the corresponding floor; based on the structural deformation information of each floor under the tower-shaped ancient building, conduct cumulative analysis of the structural deformation of the entire tower-shaped ancient building, so as to judge whether the tower-shaped ancient building has exceeded the limit of its own tolerable structural deformation, and thus issue an alarm notification according to the corresponding judgment result.

[0105] The beneficial effects of the above embodiments are as follows: based on the spatial offset information of each floor of the tower-shaped ancient building, identify the corresponding floors where the center-of-gravity offset imbalance events will occur, that is, according to the spatial offset information, determine the center-of-gravity offset swing amount of each floor. If the center-of-gravity offset swing amount exceeds the preset swing amount threshold, it is determined that the corresponding floor will have a center-of-gravity offset imbalance event; otherwise, it is determined that the corresponding floor will not have a center-of-gravity offset imbalance event. Then conduct visual recognition of the column members and beam members inside the corresponding floors where the center-of-gravity offset imbalance events will occur, and obtain the relative position change information and relative orientation change information among all the column members and all the beam members inside the corresponding floors, so as to quantitatively characterize the relative position changes and relative orientation changes among different column members, different beam members, and between column members and beam members inside the corresponding floors. Additionally, based on the relative position change information and the relative orientation change information, perform structural deformation fitting on the column-beam framework of the corresponding floor to obtain the structural deformation information of the corresponding floor, and conduct cumulative analysis of the structural deformation information of all floors of the tower-shaped ancient building, so as to judge whether the tower-shaped ancient building has exceeded the limit of its own tolerable structural deformation, and thus issue an alarm notification according to the corresponding judgment result. This can improve the credibility and accuracy of deformation monitoring, and achieve global and timely deformation monitoring and early warning of the tower-shaped ancient building.

[0106] Generally speaking, the deformation monitoring system and method for the ancient tower-shaped building scan and detect the three-dimensional spatial point cloud data of the bottommost and topmost layers of the ancient tower-shaped building, obtain the corresponding reference structural spatial information, use the bottommost and topmost layers as the reference benchmarks for subsequent calibration of the deformation degree, and do not need to scan and detect all layers of the ancient tower-shaped building, reducing the detection operation amount and the point cloud data operation amount; dynamically photograph and analyze each layer under the ancient tower-shaped building, obtain the attitude change information of each layer, and combine the reference structural spatial information to determine the spatial offset information of each layer, and quickly determine the spatial offset state of each layer through dynamic vision recognition; also based on the spatial offset information, conduct component vision recognition inside the corresponding layer, obtain the relative state information of all components, and then obtain the structural deformation information of the corresponding layer, conduct refined deformation recognition on each layer of the ancient tower-shaped building, improve the credibility and accuracy of deformation monitoring, and take into account the comprehensive and accurate detection of the deformation situation of the ancient tower-shaped building and the convenient detection with low workload.

[0107] The above is only a specific implementation manner of the present invention, and any improvements made on the premise of the present invention's concept are regarded as the protection scope of the present invention.

Claims

1. A tower-type ancient building deformation monitoring system, characterized in that: include: A scanning and detection module is used to scan and detect the bottom layer and the top layer of the ancient tower building respectively to obtain the three-dimensional space point cloud data of the bottom layer and the top layer respectively; A spatial point cloud analysis module, used to analyze the three-dimensional spatial point cloud data to generate reference structural spatial information of the tower-type ancient building; A dynamic shooting and analysis module is used to dynamically shoot the ancient tower-like building to obtain a dynamic panoramic image of each layer of the ancient tower-like building; and analyze the dynamic panoramic image to obtain posture change information of each layer of the ancient tower-like building; A spatial offset determination module, used to determine the spatial offset information of each layer of the tower-like ancient building based on the reference structure spatial information and the posture change information; An intra-layer component visual recognition module is used to perform component visual recognition on the interior of a corresponding layer of the ancient tower building based on the spatial offset information to obtain relative status information of all components inside the corresponding layer; The structural deformation determination and alarm module is used to obtain the structural deformation information of the corresponding layer based on the relative state information, and to issue an alarm notification based on the structural deformation information of each layer under the tower-like ancient building.

2. The tower-type ancient building deformation monitoring system according to claim 1, characterized in that: The scanning and detection module is used to scan and detect the bottom layer and the top layer of the ancient tower building respectively, and obtain the three-dimensional space point cloud data of the bottom layer and the top layer respectively, including: The bottom layer and the top layer of the ancient tower building are simultaneously subjected to three-dimensional laser scanning detection to obtain three-dimensional space point cloud data of the bottom layer and the top layer respectively; based on the outline information of the bottom layer and the top layer, the three-dimensional space point cloud data are screened to obtain corresponding three-dimensional space point cloud feature data; The spatial point cloud analysis module is used to analyze the three-dimensional spatial point cloud data to generate the reference structural spatial information of the tower-type ancient building, including: The three-dimensional point cloud feature data is analyzed to obtain the feature point spatial coordinate information of the bottom layer and the top layer respectively; based on the feature point spatial coordinate information, the structural edge spatial information of the bottom layer and the top layer of the tower-like ancient building in the world coordinate system is generated as the reference structure spatial information.

3. The tower-type ancient building deformation monitoring system according to claim 1, characterized in that: The dynamic shooting and analysis module is used to dynamically shoot the tower-like ancient building to obtain a dynamic panoramic image of each layer of the tower-like ancient building; analyze the dynamic panoramic image to obtain posture change information of each layer of the tower-like ancient building, including: Dynamically scan and photograph each layer of the ancient tower-like building to obtain a dynamic panoramic image of each layer of the ancient tower-like building; perform frame processing on the dynamic panoramic image to obtain a plurality of picture frames; perform pixel contour recognition processing on each picture frame to obtain edge contour feature information of each layer of the ancient tower-like building; perform time evolution analysis on the edge contour feature information corresponding to all picture frames under the dynamic panoramic image to obtain posture change information of each layer of the ancient tower-like building; The spatial offset determination module is used to determine the spatial offset information of each layer of the tower-like ancient building based on the reference structure spatial information and the posture change information, including: The posture change information of the bottom layer and the top layer of the ancient tower-like building are compared with the spatial information of the reference structure to obtain the spatial offset information of the bottom layer and the top layer of the ancient tower-like building in the world coordinate system; based on the spatial offset information of the bottom layer and the top layer, the posture change information of each layer of the ancient tower-like building except the bottom layer and the top layer is converted and corrected in terms of spatial offset direction and spatial offset amount to obtain the spatial offset information of each other layer.

4. The tower-type ancient building deformation monitoring system according to claim 1, characterized in that: The layer component visual recognition module is used to perform component visual recognition on the corresponding layer of the tower-like ancient building based on the spatial offset information to obtain relative status information of all components in the corresponding layer, including: Based on the spatial offset information of each layer of the ancient tower-like building, the corresponding layer where the gravity center offset unbalance event will occur is identified; the column components and beam components inside the corresponding layer where the gravity center offset unbalance event will occur are visually identified to obtain the relative position change information and relative orientation change information between all the column components and all the beam components inside the corresponding layer; The structural deformation determination and alarm module is used to obtain the structural deformation information of the corresponding layer based on the relative state information, and to make an alarm notification based on the structural deformation information of each layer under the tower-type ancient building, including: Based on the relative position change information and the relative orientation change information, structural deformation fitting is performed on the column and beam frame of the corresponding layer to obtain the structural deformation information of the corresponding layer; based on the structural deformation information of each layer under the tower-like ancient building, a cumulative structural deformation analysis is performed on the tower-like ancient building as a whole to determine whether the tower-like ancient building has exceeded the structural deformation limit that it can withstand, and an alarm notification is issued according to the corresponding judgment result.

5. A method for monitoring deformation of ancient tower buildings, characterized in that: include: Scan and detect the bottom layer and the top layer of the ancient tower building respectively to obtain three-dimensional space point cloud data of the bottom layer and the top layer; Analyzing the three-dimensional space point cloud data to generate reference structural space information of the tower-type ancient building; Dynamically photograph the ancient tower building to obtain a dynamic panoramic image of each layer of the ancient tower building; analyze the dynamic panoramic image to obtain posture change information of each layer of the ancient tower building; determine the spatial offset information of each layer of the ancient tower building based on the reference structure spatial information and the posture change information; Based on the spatial offset information, visual identification of components inside the corresponding layer of the ancient tower building is performed to obtain relative state information of all components inside the corresponding layer; Based on the relative state information, the structural deformation information of the corresponding layer is obtained, and based on the structural deformation information of each layer under the tower-like ancient building, an alarm notification is issued.

6. The method for monitoring deformation of an ancient tower building according to claim 5, characterized in that: Scan and detect the bottom layer and the top layer of the ancient tower building respectively to obtain three-dimensional space point cloud data of the bottom layer and the top layer; Analyzing the three-dimensional space point cloud data to generate the reference structure space information of the tower-type ancient building includes: The bottom layer and the top layer of the ancient tower building are simultaneously subjected to three-dimensional laser scanning detection to obtain three-dimensional space point cloud data of the bottom layer and the top layer respectively; based on the outline information of the bottom layer and the top layer, the three-dimensional space point cloud data are screened to obtain corresponding three-dimensional space point cloud feature data; The three-dimensional point cloud feature data is analyzed to obtain the feature point spatial coordinate information of the bottom layer and the top layer respectively; based on the feature point spatial coordinate information, the structural edge spatial information of the bottom layer and the top layer of the tower-like ancient building in the world coordinate system is generated as the reference structure spatial information.

7. The method for monitoring deformation of an ancient tower building according to claim 5, characterized in that: Dynamically photographing the ancient tower building to obtain a dynamic panoramic image of each layer of the ancient tower building; analyzing the dynamic panoramic image to obtain posture change information of each layer of the ancient tower building; Based on the reference structure spatial information and the posture change information, determining the spatial offset information of each layer of the tower-like ancient building includes: Dynamically scan and photograph each layer of the ancient tower-like building to obtain a dynamic panoramic image of each layer of the ancient tower-like building; perform frame processing on the dynamic panoramic image to obtain a plurality of picture frames; perform pixel contour recognition processing on each picture frame to obtain edge contour feature information of each layer of the ancient tower-like building; perform time evolution analysis on the edge contour feature information corresponding to all picture frames under the dynamic panoramic image to obtain posture change information of each layer of the ancient tower-like building; The posture change information of the bottom layer and the top layer of the ancient tower-like building are compared with the spatial information of the reference structure to obtain the spatial offset information of the bottom layer and the top layer of the ancient tower-like building in the world coordinate system; based on the spatial offset information of the bottom layer and the top layer, the posture change information of each layer of the ancient tower-like building except the bottom layer and the top layer is converted and corrected in terms of spatial offset direction and spatial offset amount to obtain the spatial offset information of each other layer.

8. The method for monitoring deformation of an ancient tower building according to claim 7, characterized in that: Performing time evolution analysis on edge contour feature information corresponding to all picture frames of the dynamic panoramic image to obtain posture change information of each layer of the tower-like ancient building, including: Step S1: Let the set of edge contour feature information corresponding to the i-th frame of a certain layer be D i , then the feature matching pair before the i-th frame and the i+1-th frame is: M i,i+1 =MatchDescriptors(D i ,D i+1 ) (1) In the above formula (1), M i,i+1 is the feature matching pair before the i-th frame and the i+1-th frame, MatchDescriptors is a general function that matches the features of two images; Step S2, set is the coordinate of the kth matching feature point in the i-th frame, then the average displacement vector from the i-th frame to the i+1-th frame is: In the above formula (2), is the average displacement vector from the i-th frame to the i+1-th frame; Step S3, based on the calculation result of the above step S2, determine the cumulative average displacement vector up to the i-th frame to quantify the posture change of the certain layer, In the above formula (3), T i is the cumulative average displacement vector up to the i-th frame, that is, the posture change of the layer measured up to the i-th frame, including the displacement size and direction; i and j are both positive integers.

9. The method for monitoring deformation of an ancient tower building according to claim 5, characterized in that: Based on the spatial offset information, visual identification of components inside the corresponding layer of the ancient tower building is performed to obtain relative state information of all components inside the corresponding layer; Based on the relative state information, the structural deformation information of the corresponding layer is obtained, and based on the structural deformation information of each layer under the tower-like ancient building, an alarm notification is performed, including: Based on the spatial offset information of each layer of the ancient tower-like building, the corresponding layer where the gravity center offset unbalance event will occur is identified; the column components and beam components inside the corresponding layer where the gravity center offset unbalance event will occur are visually identified to obtain the relative position change information and relative orientation change information between all the column components and all the beam components inside the corresponding layer; Based on the relative position change information and the relative orientation change information, structural deformation fitting is performed on the column and beam frame of the corresponding layer to obtain the structural deformation information of the corresponding layer; based on the structural deformation information of each layer under the tower-like ancient building, a cumulative structural deformation analysis is performed on the tower-like ancient building as a whole to determine whether the tower-like ancient building has exceeded the structural deformation limit that it can withstand, and an alarm notification is issued according to the corresponding judgment result.

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