Video-based Building Condition Monitoring Method and System

Abstract

The present invention discloses a method and system for monitoring the state of a building based on video. First, a database of the building to be monitored is established and the information of the building to be monitored is stored. Then, video images of the building to be monitored are obtained, the monitoring target area is determined, and the features of this area are extracted. Finally, the monitoring result is obtained by comparing with the standard features in the database. The method and system for monitoring the state of a building based on video provided by the present invention collect images of the building and the ground of the building through video devices distributed around the building, and perform analysis and processing in combination with the building attribute information and geographical information to obtain the monitoring result of the building tilt state and the monitoring result of the ground settlement of the building, so as to timely send a monitoring result signal and avoid losses. This method does not require a large number of pre-arranged targets, reduces the labor intensity, saves manpower, and improves the monitoring efficiency of the building.

Description

Technical Field

[0001] The present invention relates to the technical field of building monitoring, and particularly to a method and system for building status monitoring based on video. Background Art

[0002] At present, building settlement, cracking, etc. are common deformation damage phenomena in buildings. The damages caused by common building deformations include settlement, cracking, inclination, and even the collapse of the building (structure) structure, which affect normal use. Especially in the new building stage, the settlement deformation is particularly obvious, and uneven settlement will cause the inclination and tensile-compressive deformation of the building.

[0003] Therefore, building deformation monitoring is very important, and the monitoring of other aspects of the building status is also very important. However, in actual production and life, the monitoring technical means are single, and often through the laser monitoring method, which requires marking targets on the monitored building, with a large labor intensity and unable to achieve continuous deformation monitoring of the building.

[0004] Therefore, a simpler method and system that can effectively monitor the building status are needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method and system for building status monitoring based on video, which uses video images and combines building attributes and geographical information to monitor the building status.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The method for building status monitoring based on video provided by the present invention includes the following steps:

[0008] Establish a database of buildings to be monitored and store the information of buildings to be monitored;

[0009] Obtain the video images of the buildings to be monitored;

[0010] Determine the target area image of the building to be monitored according to the video image data;

[0011] Obtain the target area image and perform preprocessing to screen out the target area images that meet the requirements;

[0012] Extract the monitoring features of the target area image;

[0013] Query the corresponding image standard features in the building database according to the monitoring features of the target area;

[0014] Calculate the feature deviation value of the building to be monitored according to the monitoring features and the standard features;

[0015] Judge the monitoring status of the building to be monitored according to the feature deviation value.

[0016] Furthermore, the monitoring status of the building to be monitored is judged according to the following steps:

[0017] Judge whether the characteristic deviation value exceeds the preset threshold. If not, save the monitoring characteristic value and repeat the loop;

[0018] If so, send a monitoring result signal; and start the verification monitoring program to analyze and process the building to be monitored.

[0019] Furthermore, the verification monitoring program is carried out according to the following steps:

[0020] Obtain the historical monitoring data of the same monitoring point;

[0021] Obtain the characteristic deviation between the historical monitoring data and the image standard features;

[0022] Judge whether the change amount of the characteristic deviation is an increment. If so, it means that the monitoring characteristics of this monitoring point have changed and an alarm signal is sent; if not, analyze and process the next monitoring point in turn until all monitoring points have been analyzed and processed.

[0023] Furthermore, the video image of the building to be monitored is obtained in the following way:

[0024] Set the video monitoring device at the monitoring point of the building to be monitored;

[0025] The monitoring points are distributed around the building. The video monitoring device is used to collect images of the preset monitoring area at the monitoring point. The preset monitoring area refers to the area including the building and the ground, and this area includes the image of the building main body and the image of the ground bearing the building;

[0026] Collect the video images of each monitoring point in turn and upload them to the central processing center.

[0027] Furthermore, the monitoring feature is a pre-determined linear feature part of the building to be monitored that can represent the verticality of the building. The linear feature part is extracted through the following steps:

[0028] Preprocess the obtained target area image and output a binary image with linear features;

[0029] Identify the linear information in the binary image;

[0030] Calculate the length of this line;

[0031] Determine whether it belongs to the monitoring straight-line feature of the building to be monitored according to the straight-line length. If so, calculate the angle between the monitoring straight-line feature and the standard feature of the corresponding straight line in the building database. If the angle exceeds the preset angle threshold, send a monitoring signal. If not, repeat the loop.

[0032] Further, the straight-line feature is the straight-line part of the main outline on the building to be monitored, or the straight-line part of the pipeline provided on the building body.

[0033] Further, the building database stores the standard features of the building, and the standard features include the building design information data of the building. The building design information data is obtained from the architectural design drawing or identified from the architectural design CAD drawing.

[0034] Further, the building design information includes the elevation information, color information, coordinate information, dimension information, and location information of the building; the building design information identified from the architectural design CAD drawing is extracted into a data table to form a building design information data table.

[0035] Further, the monitoring state of the building can also be the building ground settlement state, and the building ground settlement state is carried out according to the following steps: Obtain a video image including the building and the ground area, obtain the building ground image from the video image, set the ground area that needs to be analyzed and processed, obtain the actual position coordinates of the ground area, call the standard position coordinates of the corresponding standard ground area in the building database, and judge whether the position deviation exceeds the preset threshold by comparing the actual position coordinates and the standard position coordinates. If it exceeds, the standard building ground has settled, and an alarm signal is sent. If not, repeat the loop.

[0036] The video-based building status monitoring system provided by the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method according to any one of claims 1-9.

[0037] The beneficial effects of the present invention are as follows:

[0038] The video-based building condition monitoring method and system provided by the present invention collect images of the building and the building ground through video devices distributed around the building, and perform analysis and processing in combination with building attribute information and geographical information to obtain the monitoring results of the building's inclination state and the monitoring results of the building ground settlement, so as to timely send the monitoring result signal and avoid losses. This method does not require a large number of pre-arranged targets, reduces the labor intensity, saves manpower, and improves the monitoring efficiency of the building.

[0039] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0041] Figure 1 It is a flowchart of the video-based building condition monitoring method.

[0042] Figure 2 It is a schematic diagram of the principle of the video-based building deviation monitoring system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The following further describes the present invention in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0044] As Figure 1 shown, the video-based building condition monitoring method provided in this embodiment includes the following steps:

[0045] Establish a database of buildings to be monitored and store the information of buildings to be monitored;

[0046] Obtain the video images of the buildings to be monitored;

[0047] Determine the target area image of the building to be monitored according to the video image data;

[0048] Obtain the target area image and perform preprocessing to screen the target area images that meet the requirements;

[0049] Extract the monitoring features of the target area image;

[0050] Query the corresponding image standard features of the building database according to the monitoring features of the target area;

[0051] Calculate the characteristic deviation value of the building to be monitored according to the monitoring characteristics and standard characteristics;

[0052] Judge the monitoring status of the building to be monitored according to the characteristic deviation value.

[0053] The monitoring status of the building to be monitored is judged according to the following steps:

[0054] Judge whether the characteristic deviation value exceeds the preset threshold. If not, save the monitoring characteristic value and repeat the loop;

[0055] If so, send a monitoring result signal; and start the verification monitoring program to analyze and process the building to be monitored.

[0056] The verification monitoring program is carried out according to the following steps:

[0057] Obtain the historical monitoring data of the same monitoring point;

[0058] Obtain the characteristic deviation between the historical monitoring data and the image standard characteristics;

[0059] Judge whether the change amount of the characteristic deviation is an increment. If so, it means that the monitoring characteristics of this monitoring point have changed and an alarm signal is sent; if not, analyze and process the next monitoring point in turn until all monitoring points have been analyzed and processed.

[0060] The video image of the building to be monitored in this embodiment is obtained in the following manner:

[0061] Set the video monitoring device at the monitoring point to be monitored of the building to be monitored;

[0062] The monitoring points to be monitored are distributed around the building. The video monitoring device is used to collect images of a preset monitoring area at the monitoring point. The preset monitoring area refers to an area including the building and the ground, and this area includes the image of the building main body and the image of the building bearing ground;

[0063] Collect the video images of each monitoring point to be monitored and upload them to the central processing center.

[0064] The monitoring characteristic provided in this embodiment is a pre-determined linear characteristic part that can represent the verticality of the building to be monitored. The linear characteristic part is extracted through the following steps:

[0065] Preprocess the obtained target area image and output a binary image with linear characteristics;

[0066] Identify the linear information in the binary image;

[0067] Calculate the length of this line;

[0068] Determine whether it belongs to the monitoring straight-line feature of the building to be monitored according to the straight-line length. If so, calculate the angle between the monitoring straight-line feature and the standard feature of the corresponding straight line in the building database. If the angle exceeds the preset angle threshold, send a monitoring signal. If not, repeat the cycle.

[0069] The straight-line feature provided in this embodiment is the straight-line part of the main outline on the building to be monitored, or the straight-line part of the pipeline provided on the building main body, or other straight-line parts with obvious straight-line features.

[0070] The building database in this embodiment stores the standard features of the building. The standard features include the building design information data of the building, and the building design information data is obtained from the architectural design drawing or recognized from the architectural design CAD drawing.

[0071] The building design information includes the elevation information, color information, coordinate information, dimension information, location information, etc. of the building. Among them, the building design information recognized from the architectural design CAD drawing is extracted into a data table to form a building design information data table.

[0072] The building design information in this embodiment can also be obtained through the following steps:

[0073] Determine the layer for which data needs to be extracted;

[0074] Select the determined layer;

[0075] Judge whether the layer has blocks that need to be broken up. If there are blocks, break up the blocks. If not, go to the next step;

[0076] Export the data of the determined layer;

[0077] Regularize the exported data to obtain the design data of the components in the layer.

[0078] The building database provided in this embodiment is a professional model database formed according to architectural design specifications and building components; the model database includes each building component that makes up the building model, such as doors, windows, columns, roofs, etc., which are classified and established according to categories. The building model provided in this embodiment is composed of each building component and the outer contour line of the building.

[0079] The monitoring status of the building in this embodiment can also be the ground settlement status of the building. The ground settlement status of the building is carried out according to the following steps: Obtain a video image including the building and the ground area, obtain the ground image of the building from the video image, set the ground area that needs to be analyzed and processed, obtain the actual position coordinates of the ground area, call the standard position coordinates of the corresponding standard ground area in the building database, and determine whether the position deviation exceeds a preset threshold by comparing the position deviation between the actual position coordinates and the standard position coordinates. If it exceeds, the standard building ground has settled, and an alarm signal is sent. If it does not exceed, it is repeated cyclically.

[0080] In this embodiment, different monitoring points are set at different positions of the building. Each monitoring point can synchronously collect video images and perform analysis and processing according to the synchronously collected video images to obtain the monitoring status of the building at each monitoring point, so as to form the monitoring status of different positions of the building, and the obtained status judgment is more accurate.

[0081] The above-described embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A method for monitoring the state of a building based on video, characterized in that: Including the following steps: Establish a database of buildings to be monitored and store the information of buildings to be monitored; Obtain video images of buildings to be monitored; Determine the target area image of the building to be monitored according to the video image data; Obtain the target area image and perform preprocessing to screen out the target area images that meet the requirements; Extract the monitoring features of the target area image; Query the corresponding image standard features in the building database according to the monitoring features of the target area; Calculate the feature deviation value of the building to be monitored according to the monitoring features and the standard features; Judge the monitoring status of the building to be monitored according to the feature deviation value; The monitoring feature is a pre-determined linear feature part that can represent the verticality of the building to be monitored, and the linear feature part is extracted through the following steps: Perform preprocessing on the obtained target area image and output a binary image with linear features; Identify the linear information in the binary image; Calculate the length of the line; Judge whether it belongs to the monitoring linear feature of the building to be monitored according to the line length. If so, calculate the included angle between the monitoring linear feature and the standard feature of the corresponding line in the building database. If the included angle exceeds the preset included angle threshold, send a monitoring signal. If not, repeat the loop; The monitoring status of the building also includes the building ground settlement status, and the building ground settlement status is carried out according to the following steps: Obtain a video image including the building and the ground area, obtain the building ground image from the video image, set the ground area that needs to be analyzed and processed, obtain the actual position coordinates of the ground area, call the standard position coordinates of the corresponding standard ground area in the building database, and judge whether the position deviation exceeds the preset threshold by comparing the actual position coordinates and the standard position coordinates. If it exceeds, it means that the building ground has settled and send an alarm signal. If not, repeat the loop.

2. The method for monitoring the state of a building based on video according to claim 1, wherein: The video images of the buildings to be monitored are obtained in the following way: Set the video monitoring device at the monitoring points of the buildings to be monitored; The monitoring points are distributed around the building. The video monitoring device is used to collect images of the preset monitoring area at the monitoring points. The preset monitoring area refers to the area including the building and the ground, and this area includes the image of the building main body and the image of the building bearing ground; Sequentially collect the video images of each monitoring point and upload them to the central processing center.

3. The method for monitoring the state of a building based on video according to claim 1, wherein: The linear feature is the linear part of the main contour on the building to be monitored, or the linear part of the pipeline set on the building main body.

4. The method for monitoring the state of a building based on video according to claim 1, characterized in that: The building database stores the standard features of the building, and the standard features include the building design information data of the building. The building design information data is the building design information identified from the architectural design CAD drawing.

5. The method for monitoring the building state based on video according to claim 4, wherein: The building design information includes the elevation information, color information, coordinate information, dimension information, and position information of the building; Identify the building design information from the architectural design CAD drawing and extract the building design information into a data table to form a building design information data table.

6. A video-based building condition monitoring system, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, the method described in any one of claims 1-5 is implemented.

Images