Prefabricated building simulation construction method and system

Abstract

The invention relates to the technical field of data processing, in particular to a prefabricated building simulation construction method and system, and the method comprises the steps: constructing a building structure model in a prefabricated building construction state according to the point cloud data of all components and the installation sequence of each component in a prefabricated building construction process, obtaining the inclination angle of the component between each moment and the vertical direction and the position coordinates of all constructors in the prefabricated building construction process; determining a dangerous area in the fabricated building; determining a risk severity index of the component corresponding to the dangerous area at the current moment; and determining the safety early warning degree of the movement behavior of the constructor relative to the dangerous area, and when the safety early warning degree is greater than a first threshold value, performing safety early warning on the constructor and outputting the corresponding dangerous area. Therefore, the timeliness, the accuracy and the reliability of safety early warning are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and particularly to a method and system for simulating the construction of prefabricated buildings. Background Art

[0002] In the modern construction industry, prefabricated buildings are gradually becoming the development trend in the construction field due to their significant advantages such as high efficiency, environmental protection, and controllable quality. Prefabricated buildings are constructed by prefabricating the components and fittings required for the building in the factory and then transporting them to the construction site for assembly, which greatly shortens the construction period and reduces the impact on the environment. However, during the actual construction process of prefabricated buildings, there are many potential safety hazards. Since the installation process of prefabricated components is relatively complex, problems such as unstable installation of prefabricated components may occur during actual assembly. At the same time, the operation process is also prone to instability due to various factors, which may lead to serious accidents such as the falling and tilting of assembled components, posing a great threat to the personal safety of on-site construction workers.

[0003] In some scenarios, to ensure construction safety, the construction process of prefabricated buildings is usually simulated for safety early warning. Among them, a fixed Building Information Modeling (BIM) is established to determine the dangerous areas and locate the construction workers. Once the construction workers enter the preset dangerous areas, an alarm is triggered. However, this method has obvious limitations. As the construction progresses, the dangerous areas are not static, and the movement routes of the construction workers are also uncertain. The fixed BIM model is difficult to adapt to these dynamic changes, resulting in insufficient timeliness, accuracy, and reliability of the safety early warning and being unable to effectively meet the complex and changeable safety guarantee requirements of the prefabricated building construction site. Summary of the Invention

[0004] In order to solve the technical problems of insufficient timeliness, accuracy, and reliability of the safety early warning during the construction process of prefabricated buildings, the purpose of the present invention is to provide a method and system for simulating the construction of prefabricated buildings. The specific technical solutions adopted are as follows: In a first aspect, an embodiment of the present invention provides a method for simulating the construction of a prefabricated building, including: constructing a building structure model in the construction state of the prefabricated building according to the point cloud data of all components and the installation sequence of each component during the construction of the prefabricated building, and obtaining the inclination angle between each component and the vertical direction at each moment and the position coordinates of all construction workers during the construction of the prefabricated building; determining the dangerous area in the prefabricated building from the building structure model according to the assembly parameters of the components in the prefabricated building; determining the risk severity index of the component corresponding to the dangerous area at the current moment according to the included angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of the dangerous area; determining the safety warning level of the movement behavior of the construction worker relative to the dangerous area according to the position coordinates of the construction worker at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment. When the safety warning level is greater than the first threshold, a safety warning is given to the construction worker and the corresponding dangerous area is output.

[0005] Optionally, determining the dangerous area in the prefabricated building from the building structure model according to the assembly parameters of the components in the prefabricated building includes: determining the first possibility that the component is a load-bearing component according to the inclination angle in the assembly parameters, the first projected area of the component in the horizontal direction and the second projected area of the component in the vertical direction in the assembly parameters of the component. When the first possibility is greater than the second threshold, determining that the component is a load-bearing component and marking the upper surface of the component as the load-bearing plane; obtaining the cross-section in the building structure model along the load-bearing plane, extracting the edge of the cross-section and traversing each edge point on the edge, and marking the first edge point in the direction of decreasing numerical value along the height axis starting from the current edge point as the height corresponding point of the current edge point; determining the second possibility that the current edge point in the cross-section belongs to the height sudden drop area according to the height difference between the current edge point and the height corresponding point and the average value of the height differences between all adjacent load-bearing planes in the building structure model, selecting all edge points with the second possibility greater than the third threshold as the effective height sudden drop points, extracting the area where all the effective height sudden drop points are located and performing dilation processing; when the dilated area forms a closed figure, marking the area corresponding to the closed figure as the height sudden drop area; when the inclination angle is not the fourth threshold, determining that the component is in an inclined state and marking the inclined risk area on the load-bearing plane of the component; marking the union between the height sudden drop area and the inclined risk area as the dangerous area in the prefabricated building.

[0006] Optionally, determining the first possibility that a component is a load-bearing component based on the tilt angle in the assembly parameters, the first projected area of the component in the horizontal direction in the assembly parameters of the component, and the second projected area of the component in the vertical direction includes: determining the angle between the component and the horizontal direction according to the tilt angle, and calculating the first cosine value between the angle between the component and the horizontal direction; calculating the first sum value between the first cosine value and a predetermined value, and calculating the first product between the first sum value and the second projected area; calculating the first ratio between the first projected area and the first product, and performing a normalization process on the first ratio to obtain the first possibility.

[0007] Optionally, determining the second possibility that the current edge point in the cross-section belongs to the height drop region based on the height difference between the current edge point and the height corresponding point and the average value of the height differences between all adjacent load-bearing planes in the building structure model includes: calculating the second ratio between the height difference between the current edge point and the height corresponding point and the average value of the height differences; performing a normalization process on the second ratio to obtain the second possibility.

[0008] Optionally, determining the risk severity index of the component corresponding to the danger area at the current moment based on the angles between the component corresponding to the danger area and the horizontal direction at each moment, the tilt angle between the component corresponding to the danger area and the vertical direction at the current moment, and the area of the danger area includes: determining the tilt amplitude change index of the component corresponding to the danger area at the adjacent moment according to the angles between the component corresponding to the danger area and the horizontal direction at the adjacent moment; determining the risk severity index of the component corresponding to the danger area at the current moment based on the tilt amplitude change index between the component corresponding to the danger area at the current moment and the adjacent previous moment, the maximum value of the tilt amplitude change indexes of the component corresponding to the danger area, the angle between the component corresponding to the danger area and the vertical direction at the current moment, the area of the danger area, and the first possibility that other components connected to the component corresponding to the danger area are load-bearing components.

[0009] Optionally, determining the tilt amplitude change index of the component corresponding to the danger area at the adjacent moment according to the angles between the component corresponding to the danger area and the horizontal direction at the adjacent moment includes: determining the difference between the cosine values of the angles between the component corresponding to the danger area and the horizontal direction at the adjacent moment as the tilt amplitude change index.

[0010] Optionally, based on the change index of the inclination amplitude of the component corresponding to the dangerous area between the current moment and the adjacent previous moment, the maximum value of the change index of the inclination amplitude of the component corresponding to the dangerous area, the angle between the component corresponding to the dangerous area and the vertical direction at the current moment, the area of the dangerous area, and the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components, determining the risk severity index of the component corresponding to the dangerous area at the current moment includes: calculating the second product between the change index of the inclination amplitude of the component corresponding to the dangerous area between the current moment and the adjacent previous moment and the second cosine value of the angle between the component and the vertical direction at the current moment, and calculating the third ratio between the second product and the maximum value of the change index of the inclination amplitude; calculating the fourth ratio between the area of the dangerous area and the average value of the areas of all dangerous areas at the current moment, and the fifth ratio between the maximum value of the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components and the average value of the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components; determining that the third product among the third ratio, the fourth ratio, and the fifth ratio is the risk severity index of the component corresponding to the dangerous area at the current moment.

[0011] Optionally, according to the position coordinates of the construction workers at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment, determining the safety warning level of the movement behavior of the construction workers relative to the dangerous area includes: determining the degree of danger of the construction workers relative to the dangerous area at the current moment according to the position coordinates of the construction workers at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment; determining that the sixth ratio between the degree of danger of the construction workers relative to the dangerous area at the current moment and the maximum value of the degrees of danger of all construction workers relative to each dangerous area at the current moment is the safety warning level of the movement behavior of the construction workers relative to the dangerous area.

[0012] Optionally, determining the degree of danger of the construction worker relative to the dangerous area at the current moment according to the position coordinates of the construction worker at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment includes: calculating the displacement and the moving direction vector of the construction worker at the current moment relative to the previous moment according to the position coordinates of the construction worker at each moment, and determining the distance and the direction vector between the construction worker at the current moment and the coordinate center point according to the position coordinates of the construction worker at the current moment and the coordinate center point of the dangerous area; determining the vector angle between the moving direction vector and the direction vector; calculating the fourth product between the distance and the vector angle, and calculating the seventh ratio between the displacement and the fourth product; calculating the eighth ratio between the risk severity index of the component corresponding to the dangerous area at the current moment and the maximum value of the risk severity indexes of the components corresponding to the dangerous area at each moment; normalizing the fifth product between the seventh ratio and the eighth ratio to obtain the degree of danger.

[0013] In a second aspect, an embodiment of the present invention provides an assembled building simulation construction system, including: a processor and a memory; wherein, the memory is used for storing a computer program that can run on the processor; the processor is used for executing the program stored on the memory to implement the steps of the assembled building simulation construction method mentioned in the first aspect.

[0014] The present invention has the following beneficial effects: First, according to the point cloud data of all components and the installation sequence of each component during the construction process of the assembled building, a building structure model in the construction state of the assembled building is constructed; the inclination angle between each component and the vertical direction at each moment and the position coordinates of all construction workers during the construction process of the assembled building are obtained; then, according to the assembly parameters of the components in the assembled building, the dangerous areas in the assembled building are determined from the building structure model; secondly, according to the angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of the dangerous area, the risk severity index of the component corresponding to the dangerous area at the current moment is determined; finally, according to the position coordinates of the construction worker at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment, the safety warning degree of the moving behavior of the construction worker relative to the dangerous area is determined; when the safety warning degree is greater than the first threshold, a safety warning is given to the construction worker and the corresponding dangerous area is output.

[0015] Thus, the embodiment of the present invention determines the dynamically changing dangerous areas in the prefabricated building in real time based on the assembly parameters of different components under the current construction progress of the prefabricated building, and determines the risk severity index of the components corresponding to the dangerous areas at the current moment based on the inclination angles of the components. Then, combined with the movement trend of the construction personnel, the risk of the current movement behavior of the construction personnel is evaluated, and the safety warning level of the construction personnel moving relative to the dangerous areas is determined, so as to warn the dangerous behaviors of the construction personnel. Thus, the dynamically changing dangerous areas and the behaviors of the construction personnel with real-time changing action routes during the construction process of the prefabricated building are monitored in real time, improving the timeliness, accuracy and reliability of the safety warning, and effectively meeting the complex and changeable safety guarantee requirements at the construction site of the prefabricated building. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions and advantages 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.

[0017] Figure 1 It is a flowchart of a prefabricated building simulation construction method provided by an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a prefabricated building simulation construction system provided by an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a prefabricated building simulation construction system provided by another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in conjunction with the drawings and preferred embodiments, describe in detail the specific implementation methods, structures, features and effects of a prefabricated building simulation construction method and system proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0020] The following will specifically describe the specific solution of a prefabricated building simulation construction method provided by the present invention in conjunction with the drawings.

[0021] Embodiment 1: Please refer to Figure 1 , which shows a flowchart of a prefabricated building simulation construction method provided by an embodiment of the present invention, including: S101. According to the point cloud data of all components and the installation sequence of each component during the construction of the prefabricated building, construct a building structure model in the construction state of the prefabricated building, and obtain the inclination angle between each component and the vertical direction at each moment and the position coordinates of all construction workers during the construction process of the prefabricated building.

[0022] Specifically, in the embodiment of the present invention, a three-dimensional laser scanner is used to scan all components during the construction process of the current prefabricated building, obtain the corresponding point cloud data and perform preprocessing, where the preprocessing includes but is not limited to filtering and noise reduction. Then, the point cloud data of all components is input into three-dimensional modeling software, such as 3Dmax, and the components are spliced in the three-dimensional modeling software according to the actual construction sequence to obtain a building structure model in the construction state of the prefabricated building.

[0023] Furthermore, in the embodiment of the present invention, an angle sensor is installed on each component to obtain the inclination angle of the corresponding component, that is, the included angle between the component and the vertical direction. In addition, the angle sensor can also obtain the included angle between the component and the horizontal direction. Or the included angle between the component and the horizontal direction can also be determined by the inclination angle of the component. The data acquisition frequency can be once per second.

[0024] Furthermore, in the embodiment of the present invention, an RFID tag chip is worn by all construction workers participating in the construction during the construction process of the prefabricated building, and the position coordinates of all construction workers are obtained in real time, with data obtained once per second.

[0025] S102. Determine the dangerous areas in the prefabricated building from the building structure model according to the assembly parameters of the components in the prefabricated building.

[0026] Specifically, during the construction of the prefabricated building, there may be situations where construction workers fall or are injured due to areas with a sudden drop in building structure height (such as reserved holes on the building floor) or where the safety of construction workers is threatened due to component inclination or even collapse. Therefore, in the embodiment of the present invention, the dangerous areas are determined based on the building structure model of the current prefabricated building and the inclination of the components. Among them, during the construction of the prefabricated building, construction workers often move on the load-bearing surface of each floor of the building (that is, the plane composed of the horizontal floor slab). Therefore, in the embodiment of the present invention, the areas with sudden drops in height in each floor load-bearing surface of the prefabricated building in the current state are marked, and the above-mentioned dangerous areas are determined based on the areas with sudden drops in height.

[0027] Further, as an optional embodiment of the present invention, determining the dangerous area in the prefabricated building from the building structure model according to the assembly parameters of the components in the prefabricated building includes: determining the first possibility that the component is a load-bearing component according to the inclination angle in the assembly parameters, the first projected area of the component in the horizontal direction and the second projected area of the component in the vertical direction in the assembly parameters of the component. When the first possibility is greater than the second threshold, determining that the component is a load-bearing component and marking the upper surface of the component as the load-bearing plane; obtaining the cross-section in the building structure model along the load-bearing plane, extracting the edges of the cross-section and traversing each edge point on the edge, and marking the first edge point in the direction of decreasing numerical value along the height axis starting from the current edge point as the height corresponding point of the current edge point; determining the second possibility that the current edge point in the cross-section belongs to the height sudden drop area according to the height difference between the current edge point and the height corresponding point and the average value of the height differences between all adjacent load-bearing planes in the building structure model, selecting all edge points with the second possibility greater than the third threshold as the effective height sudden drop points, extracting the area where all the effective height sudden drop points are located and performing dilation processing; when a closed figure is formed in the area after the dilation processing, marking the area corresponding to the closed figure as the height sudden drop area; when the inclination angle is not the fourth threshold, determining that the component is in an inclined state and marking the inclined risk area on the load-bearing plane of the component; marking the union between the height sudden drop area and the inclined risk area as the dangerous area in the prefabricated building.

[0028] Specifically, in the embodiment of the present invention, based on the detection result of the angle sensor, if the angle between a certain component and the horizontal direction measured in the current state tends to 0 and the area of the component in the horizontal plane is greater than the area of the vertical plane, then it is marked as a load-bearing component, and the upper surface of the load-bearing component is the load-bearing plane. Among them, as an optional embodiment of the present invention, determining the first possibility that the component is a load-bearing component according to the inclination angle in the assembly parameters, the first projected area of the component in the horizontal direction and the second projected area of the component in the vertical direction in the assembly parameters of the component includes: determining the angle between the component and the horizontal direction according to the inclination angle, and calculating the first cosine value between the angle between the component and the horizontal direction; calculating the first sum value between the first cosine value and the predetermined value, and calculating the first product between the first sum value and the second projected area; calculating the first ratio between the first projected area and the first product, and performing normalization processing on the first ratio to obtain the first possibility.

[0029] Specifically, taking the kth component as an example in the embodiment of the present invention, the predetermined value is taken as 0.01 to avoid the denominator being 0, and the following formula is used to calculate the first possibility that the kth component is a load-bearing component: In the above formula, represents the first possibility that the kth component is a load-bearing component. Represents the angle between the kth component and the horizontal direction. is its cosine value, that is, the first cosine value. Represents the first projection area of ​​the kth component in the horizontal direction. represents the second projection area of ​​the kth component in the vertical direction, The larger its value is, the larger the projection area of ​​the kth component on the horizontal plane is than the projection area on the vertical plane. () represents the normalization function, which is used to Normalize it and Normalized to (0,1).

[0030] Furthermore, the second threshold value can be set according to the actual situation. In the embodiment of the present invention, the value is 0.5, marking the normalized result. Components with a value greater than 0.5 are load-bearing components, and their upper surfaces are marked as load-bearing planes.

[0031] Further, in an embodiment of the present invention, a section in the building structure model of the current prefabricated building is obtained along the load-bearing plane, the edge of the current section is extracted using the Canny operator and each edge point is traversed, and the second possibility that the single edge point of the current section belongs to the height drop region is analyzed by taking a single edge point of the current section as an example. Further, the first point in the direction of decreasing value along the height axis (z axis) from the edge point is marked as the height corresponding point of the edge point (except for the point belonging to the same component as the current edge point), and the greater the height difference between the edge point and its height corresponding point, the greater the second possibility that the edge point belongs to the height drop region. Among them, as an optional embodiment of the present invention, according to the height difference between the current edge point and the height corresponding point and the average value of the height difference between all adjacent load-bearing planes in the building structure model, determining the second possibility that the current edge point in the section belongs to the height drop region includes: calculating the second ratio between the height difference between the current edge point and the height corresponding point and the average value of the height difference; normalizing the second ratio to obtain the second possibility.

[0032] Specifically, the embodiment of the present invention uses the following formula to calculate the second possibility: In the above formula, It is the second possibility that the i-th edge point in the current section belongs to the height drop area. Indicates the point corresponding to the i-th edge point and its height height difference. Represents the average value of the height differences between all adjacent load-bearing planes in the current building structure model. The larger it is, it means that the height difference between the position where the current edge point is located and the corresponding point of its height is larger compared to the height difference between floors in the current building structure model, and the greater the degree of sudden drop in the height of the position where the current edge point is located. for carrying out normalization processing.

[0033] Furthermore, the third threshold can be set according to the actual scenario, and in the embodiments of the present invention, it is set to 0.5. Traverse all the edge points in the current cross-section to obtain the second possibility that they belong to the height sudden drop region, and mark the edge points greater than 0.5 as height sudden drop valid points, extract the regions where all the height sudden drop valid points are located, and perform dilation processing on them. If the region obtained after processing forms a closed figure, then mark all the points within the closed figure as height sudden drop region points, and the region where they are located is the height sudden drop region.

[0034] Furthermore, obtain the inclination risk region caused by the inclination of components: If the angle measured between a certain component in the current building structure model and the vertical direction is not the fourth threshold, it is considered to be in an inclined state. At this time, there is a risk of the component collapsing towards the inclined side, so mark the inclination risk region of the component on its bearing plane. Specifically, the projection region of the component on its bearing plane is the inclination risk region of the component at the current moment. Among them, the fourth threshold can be set according to the actual situation, and in the embodiments of the present invention, it is set to 0.

[0035] Furthermore, in the embodiments of the present invention, take the union of the height sudden drop region and the inclination risk region and uniformly mark it as the dangerous region in the current building structure model, and mark the components corresponding to safety hazards in all dangerous regions as dangerous components.

[0036] S103. According to the angle between the component corresponding to the dangerous region and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous region and the vertical direction at the current moment, and the area of the dangerous region, determine the risk severity index of the component corresponding to the dangerous region at the current moment.

[0037] Specifically, in the embodiments of the present invention, the component corresponding to the dangerous region is the dangerous component. During the assembly process of the prefabricated building, there are situations such as the components being not firmly assembled, resulting in component inclination, which may cause the component to collapse or the structure in the area to be unstable. And during the assembly process, there are interactions between components. If there are many unstable components in the adjacent range of the dangerous component corresponding to the dangerous region, it will increase the severity of the risk to the personal safety of construction workers caused by the current dangerous region. The faster the inclination degree of the current component increases, the greater the increase in the severity of the risk in the dangerous region. Therefore, in the embodiments of the present invention, the risk severity index of the dangerous region in the current building structure is obtained by combining the component inclination degree.

[0038] Further, as an optional embodiment of the present invention, determining the risk severity index of the component corresponding to the dangerous area at the current moment based on the angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of the dangerous area includes: determining the inclination amplitude change index of the component corresponding to the dangerous area at the adjacent moment according to the angle between the component corresponding to the dangerous area and the horizontal direction at the adjacent moment; based on the inclination amplitude change index between the current moment and the previous adjacent moment of the component corresponding to the dangerous area, the maximum value of the inclination amplitude change index of the component corresponding to the dangerous area, the angle between the component corresponding to the dangerous area and the vertical direction at the current moment, the area of the dangerous area, and the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components, determining the risk severity index of the component corresponding to the dangerous area at the current moment.

[0039] Specifically, in the embodiment of the present invention, the inclination amplitude change index refers to the change in the inclination amplitude of the component within two adjacent moments before and after. As an optional embodiment of the present invention, determining the inclination amplitude change index of the component corresponding to the dangerous area according to the angle between the component corresponding to the dangerous area and the horizontal direction at the adjacent moment includes: determining the difference between the cosine values of the angles between the component corresponding to the dangerous area and the horizontal direction at the adjacent moment as the inclination amplitude change index.

[0040] Among them, the embodiment of the present invention specifically calculates the inclination amplitude change index by the following formula: In the above formula, is the inclination amplitude change index of the component corresponding to the jth dangerous area at the tth moment and the t + 1th moment. represents the angle between the component corresponding to the dangerous area at the tth moment and the horizontal direction, is its cosine value. represents the angle between the component corresponding to the dangerous area at the t + 1th moment and the horizontal direction, is its cosine value.

[0041] Further, taking the component corresponding to a single dangerous area as an example, if the stability of all components connected to the component in the building structure model at the current moment is worse, it is less conducive to the structural stability of the current component. And if, as of the current moment, the degree of increase in the inclination amplitude of the component corresponding to the dangerous area is greater, and the inclination angle of the component itself is larger at the current moment and the area of the dangerous area is larger, the severity of the risk to the personal safety of construction workers is greater. Therefore, the risk severity index of a single dangerous area is obtained.

[0042] Further, as an alternative embodiment of the present invention, based on the inclination amplitude change index of the component corresponding to the dangerous area between the current moment and the previous adjacent moment, the maximum value among the inclination amplitude change indexes of the components corresponding to the dangerous area, the angle between the component corresponding to the dangerous area and the vertical direction at the current moment, the area of the dangerous area, and the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components, determining the risk severity index of the component corresponding to the dangerous area at the current moment includes: calculating the second product between the inclination amplitude change index of the component corresponding to the dangerous area between the current moment and the previous adjacent moment and the second cosine value of the angle between the component and the vertical direction at the current moment, and calculating the third ratio between the second product and the maximum value among the inclination amplitude change indexes; calculating the fourth ratio between the area of the dangerous area and the average value of the areas of all dangerous areas at the current moment, and the fifth ratio between the maximum value among the first possibilities that other components connected to the component corresponding to the dangerous area are load-bearing components and the average value of the first possibilities that other components connected to the component corresponding to the dangerous area are load-bearing components; determining the third product among the third ratio, the fourth ratio, and the fifth ratio as the risk severity index of the component corresponding to the dangerous area at the current moment.

[0043] Specifically, the embodiment of the present invention calculates the risk severity index of the component corresponding to the dangerous area at the current moment by using the following formula: In the above formula, represents the risk severity index of the component corresponding to the j-th dangerous area at the current moment. represents the inclination amplitude change index of the component corresponding to the j-th dangerous area at the current moment and the previous moment. represents the maximum value among the inclination amplitude change indexes corresponding to the j-th dangerous area up to the current moment. represents the angle between the component corresponding to the j-th dangerous area and the vertical direction at the current moment, is its cosine value. represents the area of the j-th dangerous area. represents the average value of the areas of all dangerous areas at the current moment. represents the maximum value among the first possibilities that other components connected to the component corresponding to the current j-th dangerous area are load-bearing components. represents the average value of the first possibilities that other components connected to the component corresponding to the current j-th dangerous area are load-bearing components. Among them, The larger it is, the greater the degree of increase in the inclination amplitude of the current j-th dangerous area, The larger it is, the larger the area of the current j-th dangerous area. The greater it is, the greater the degree of inclination of all connecting components around the current component in the horizontal direction, the worse the stability, and it is less conducive to the structural stability of the component corresponding to the j-th dangerous area. Traverse all dangerous areas to obtain the corresponding .

[0044] S104. According to the position coordinates of the construction personnel at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment, determine the safety warning level of the movement behavior of the construction personnel relative to the dangerous area. When the safety warning level is greater than the first threshold, give a safety warning to the construction personnel and output the corresponding dangerous area.

[0045] Specifically, during the construction process, the construction personnel need to move on the load-bearing plane. From the steps in the above embodiments of the present invention, it can be seen that there are many dangerous areas on the load-bearing plane. If the speed of the construction personnel during the movement is faster, the position and movement trend are closer to the dangerous area, and the risk severity index of the corresponding dangerous area, then the greater the possibility that the behavior of the construction personnel in the current state is dangerous. Therefore, the behavior risk of the construction personnel is predicted by combining the recent movement trend of the construction personnel.

[0046] Furthermore, in the above embodiments of the present invention, the position of the construction personnel is obtained by using the RFID tag chip. Mark the point where the current construction personnel is located on the surface of the component where the construction personnel are located, and match this point with the corresponding point in the current building structure model. Taking a single construction personnel as an example in the embodiments of the present invention, analyze his movement trend. Denote the movement direction vector of the construction personnel at adjacent moments as , that is, the direction from the corresponding point of the construction personnel at the t-th moment to the corresponding point at the t + 1-th moment in the current building structure model is .

[0047] Furthermore, in the embodiments of the present invention, combine the displacement situation of a certain construction personnel in the past ten minutes to analyze the behavior risk of the construction personnel. Denote the sum vector of all movement direction vectors at all moments within the current time period as the movement direction of the current construction personnel , that is, if the movement speed of the construction personnel at the current moment is faster, the movement direction and the current position are closer to the dangerous area, and the risk severity index of the current dangerous area is greater, then the behavior risk of the construction personnel is greater.

[0048] Further, as an optional embodiment of the present invention, determining the safety warning level of the movement behavior of the construction personnel relative to the dangerous area according to the position coordinates of the construction personnel at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment includes: determining the degree of danger of the construction personnel relative to the dangerous area at the current moment according to the position coordinates of the construction personnel at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment; determining the sixth ratio between the degree of danger of the construction personnel relative to the dangerous area at the current moment and the maximum value of the degrees of danger of all construction personnel relative to each dangerous area at the current moment, which is the safety warning level of the movement behavior of the construction personnel relative to the dangerous area.

[0049] Specifically, the embodiment of the present invention calculates the degree of danger of the construction personnel relative to the dangerous area at the current moment in combination with the moving direction of the construction personnel. As an optional embodiment of the present invention, first, calculate the displacement and moving direction vector of the construction personnel at the current moment relative to the previous moment according to the position coordinates of the construction personnel at each moment, and determine the distance and direction vector between the construction personnel at the current moment and the coordinate center point according to the position coordinates of the construction personnel at the current moment and the coordinate center point of the dangerous area; then determine the vector angle between the moving direction vector and the direction vector; calculate the fourth product between the distance and the vector angle, and calculate the seventh ratio between the displacement and the fourth product; secondly, calculate the eighth ratio between the risk severity index of the component corresponding to the dangerous area at the current moment and the maximum value of the risk severity indexes of the components corresponding to the dangerous area at each moment; finally, normalize the fifth product between the seventh ratio and the eighth ratio to obtain the degree of danger.

[0050] Specifically, the embodiment of the present invention calculates the degree of danger using the following formula: In the above formula, represents the degree of danger of the r-th construction personnel relative to the j-th dangerous area at the current moment. represents the displacement of the construction personnel between the current moment and the previous moment, and the larger its value, the greater the moving speed of the current personnel. represents the distance of the construction personnel from the coordinate center point of the j-th dangerous area at the current moment. represents the direction vector from the position where the current construction personnel is located to the coordinate center point of the j-th dangerous area. represents the moving direction vector of the current construction personnel, represents the risk severity index of the component corresponding to the j-th dangerous area at the current moment, represents the maximum value of the risk severity indexes corresponding to all current dangerous areas. represents The vector angle with is smaller, the closer the moving direction of the current construction worker is to the dangerous area. The larger it is, the greater the risk severity index of the j-th dangerous area. represents a normalization function, which is used to perform normalization processing.

[0051] Based on the above steps, the between the current construction worker and all dangerous areas at the current moment is obtained.

[0052] Furthermore, in the embodiment of the present invention, the risk severity index of a certain construction worker relative to a single dangerous area is obtained through the above steps. By comparing the risk severity indexes of all construction workers in the current construction range with each dangerous area, when the risk severity index of a certain construction worker for a certain dangerous area is larger than that of all construction workers in the construction range, the degree of safety warning required for it is greater.

[0053] Furthermore, the embodiment of the present invention calculates the safety warning degree of the moving behavior of the construction worker relative to the dangerous area by using the following formula: In the above formula, represents the safety warning degree that needs to be set for the moving behavior of the r-th construction worker relative to the j-th dangerous area. represents the degree of danger of the r-th construction worker relative to the j-th dangerous area at the current moment. represents the maximum value of the degrees of danger of all construction workers relative to each dangerous area at the current moment.

[0054] Furthermore, the first threshold in the embodiment of the present invention can be determined according to the actual situation. In the embodiment of the present invention, the value is 0.5. For when it is greater than 0.5, safety warnings are given to the corresponding construction workers, and the corresponding dangerous areas are output.

[0055] Based on the assembly parameters of different components under the current construction progress of the prefabricated building, the embodiment of the present invention determines the dynamically changing dangerous areas in the prefabricated building in real time, and determines the risk severity index of the components corresponding to the dangerous areas at the current moment based on the inclination angles of the components. Then, combined with the moving trend of the construction workers, the risk of the moving behavior of the current construction workers is evaluated, and the safety warning degree of the construction workers moving relative to the dangerous areas is determined, so as to give warnings to the dangerous behaviors of the construction workers. Thus, the dynamically changing dangerous areas and the behaviors of the construction workers with real-time changing action routes during the construction process of the prefabricated building are monitored in real time, improving the timeliness, accuracy and reliability of safety warnings, and effectively meeting the complex and changeable safety guarantee requirements of the prefabricated building construction site.

[0056] Embodiment 2: Corresponding to the prefabricated building simulation construction method provided in the above embodiment, based on the same technical concept, the embodiment of the present invention further provides a prefabricated building simulation construction system, and this prefabricated building simulation construction system is used to execute the above prefabricated building simulation construction method. Figure 2 As shown in the structure diagram of a prefabricated building simulation construction system provided by an embodiment of the present invention, Figure 2 as shown. The prefabricated building simulation construction system 200 includes: a construction module 201, which is used to construct a building structure model in the construction state of the prefabricated building according to the point cloud data of all components in the prefabricated building construction process and the installation sequence of each component, and obtain the inclination angle between the component and the vertical direction at each moment and the position coordinates of all construction workers during the prefabricated building construction process; a determination module 202, which is used to determine the dangerous area in the prefabricated building from the building structure model according to the assembly parameters of the components in the prefabricated building; the determination module 202 is also used to determine the risk severity index of the component corresponding to the dangerous area at the current moment according to the included angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of the dangerous area; the determination module 202 is also used to determine the safety warning level of the movement behavior of the construction worker relative to the dangerous area according to the position coordinates of the construction worker at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment. When the safety warning level is greater than the first threshold, a safety warning is given to the construction worker and the corresponding dangerous area is output.

[0057] Embodiment 3: Corresponding to the prefabricated building simulation construction method provided in the above embodiment, based on the same technical concept, the embodiment of the present invention further provides a prefabricated building simulation construction system, and this prefabricated building simulation construction system is used to execute the above prefabricated building simulation construction method. Figure 3 As shown in the structure diagram of a prefabricated building simulation construction system provided by another embodiment of the present invention, Figure 3 as shown. The prefabricated building simulation construction system may vary greatly due to configuration or performance, and may include one or more processors 301 and a memory 302. The memory 302 is used to store computer programs that can run on the processor 301. The processor 301 is used to execute the programs stored on the memory 302 to implement the above Figure 1Each step in the method embodiments. Among them, the memory 302 can be transient storage or persistent storage. The application programs stored in the memory 302 can include one or more modules (not shown in the figure), and each module can include a series of computer-executable instructions in the prefabricated building simulation construction system.

[0058] Furthermore, the processor 301 can be set to communicate with the memory 302 and execute a series of computer-executable instructions in the memory 302 on the prefabricated building simulation construction system. The prefabricated building simulation construction system can also include one or more power supplies 303, one or more wired or wireless network interfaces 304, one or more input / output interfaces 305, and one or more keyboards 306.

[0059] Specifically, in this embodiment, the prefabricated building simulation construction system includes a processor, a communication interface, a memory, and a communication bus; among them, the processor, the communication interface, and the memory complete communication with each other through the bus; the memory is used to store computer programs; the processor is used to execute the programs stored on the memory to implement the above Figure 1 Each step in the method embodiments, and has the beneficial effects of the above method embodiments. To avoid repetition, the embodiments of the present invention will not be described in detail here.

[0060] It should be noted that the prefabricated building simulation construction system provided in the embodiments of the present invention and the prefabricated building simulation construction method provided in the embodiments of the present invention are based on the same application concept. Therefore, the specific implementation of this embodiment can refer to the implementation of the aforementioned prefabricated building simulation construction method, and has the same or similar beneficial effects. The repeated parts will not be described in detail.

[0061] It should be noted that the above order of the embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0062] Each embodiment in this specification is described in a progressive manner. The same or similar parts between the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

Claims

1. A method for simulating the construction of an assembled building, characterized in that: The assembled building simulation construction method comprises: According to the point cloud data of all components in the prefabricated building construction process and the installation order of each component, a building structure model of the prefabricated building in the construction state is constructed, and the inclination angle between the components and the vertical direction at each time and the position coordinates of all construction personnel in the prefabricated building construction process are obtained; Determining a dangerous area in the prefabricated building from the building structure model according to assembly parameters of components in the prefabricated building; Determine the risk severity index of the component corresponding to the dangerous area at the current moment according to the angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of ​​the dangerous area; Determine the safety warning degree of the movement behavior of the construction personnel relative to the dangerous area according to the position coordinates of the construction personnel at each time, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current time, and when the safety warning degree is greater than a first threshold, issue a safety warning to the construction personnel and output the corresponding dangerous area; Wherein, the method for determining the dangerous area in the prefabricated building includes: Determine a first possibility that the component is a load-bearing component according to the inclination angle in the assembly parameters, the first projection area of ​​the component in the horizontal direction in the assembly parameters of the component, and the second projection area of ​​the component in the vertical direction; if the first possibility is greater than a second threshold, determine that the component is a load-bearing component, and mark the upper surface of the component as a load-bearing plane; Acquire a cross section in the building structure model along the load-bearing plane, extract the edge of the cross section and traverse each edge point on the edge, and mark the first edge point in the direction of decreasing value along the height axis from the current edge point as the height corresponding point of the current edge point; Determine, according to the height difference between the current edge point and the height corresponding point and the average value of the height differences between all adjacent load-bearing planes in the building structure model, a second possibility that the current edge point in the cross section belongs to a height sudden drop area, select all edge points whose second possibility is greater than a third threshold as height sudden drop effective points, extract the area where all the height sudden drop effective points are located and perform expansion processing; When the area after the expansion process forms a closed figure, marking the area corresponding to the closed figure as a sudden height drop area; When the tilt angle is not equal to a fourth threshold, determining that the component is in a tilt state and marking a tilt risk area on a load-bearing plane of the component; The union of the sudden height drop area and the tilt risk area is marked as a dangerous area in the prefabricated building.

2. The method for simulating construction of assembled buildings according to claim 1, characterized in that: The first possibility of determining that the component is a load-bearing component according to the inclination angle in the assembly parameters, the first projection area of ​​the component in the horizontal direction in the assembly parameters of the component, and the second projection area of ​​the component in the vertical direction includes: Determine the angle between the component and the horizontal direction according to the inclination angle, and calculate the first cosine value of the angle between the component and the horizontal direction; Calculating a first sum value between the first cosine value and a predetermined value, and calculating a first product between the first sum value and the second projected area; A first ratio between the first projection area and the first product is calculated, and the first ratio is normalized to obtain the first possibility.

3. The method for simulating construction of assembled buildings according to claim 1, characterized in that: The second possibility of determining that the current edge point in the cross section belongs to the height drop area according to the height difference between the current edge point and the height corresponding point and the average value of the height differences between all adjacent load-bearing planes in the building structure model includes: Calculating a second ratio between a height difference between the current edge point and the height corresponding point and an average value of the height differences; The second ratio is normalized to obtain the second possibility.

4. The method for simulating construction of assembled buildings according to claim 1, characterized in that: Determining the risk severity index of the component corresponding to the dangerous area at the current moment according to the angle between the component corresponding to the dangerous area and the horizontal direction at each moment, the inclination angle between the component corresponding to the dangerous area and the vertical direction at the current moment, and the area of ​​the dangerous area includes: Determine the tilt amplitude variation index of the component corresponding to the dangerous area at the adjacent moments according to the angle between the component corresponding to the dangerous area and the horizontal direction at the adjacent moments; Based on the inclination amplitude change index of the component corresponding to the dangerous area between the current moment and the adjacent previous moment, the maximum value of the inclination amplitude change index of the component corresponding to the dangerous area, the angle between the component corresponding to the dangerous area and the vertical direction at the current moment, the area of ​​the dangerous area and the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components, the risk severity index of the component corresponding to the dangerous area at the current moment is determined.

5. The method for simulating construction of assembled buildings according to claim 4, characterized in that: Determining the tilt amplitude variation index of the component corresponding to the dangerous area at adjacent moments according to the angle between the component corresponding to the dangerous area and the horizontal direction at adjacent moments includes: The difference between the cosine values ​​of the angles between the components corresponding to the dangerous area and the horizontal direction at adjacent moments is determined as the tilt amplitude change index.

6. The method for simulating construction of assembled buildings according to claim 4, characterized in that: The risk severity index of the component corresponding to the dangerous area at the current moment is determined based on the inclination amplitude change index between the current moment and the adjacent previous moment of the component corresponding to the dangerous area, the maximum value of the inclination amplitude change index of the component corresponding to the dangerous area, the angle between the component corresponding to the dangerous area and the vertical direction at the current moment, the area of ​​the dangerous area, and the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components, including: Calculate a second product of an index of a change in the tilt amplitude of a component corresponding to the dangerous area between a current moment and an adjacent previous moment and a second cosine value of an angle between the component and a vertical direction at the current moment, and calculate a third ratio of the second product to a maximum value of the index of a change in the tilt amplitude; Calculating a fourth ratio between the area of ​​the dangerous area and the average of the areas of all dangerous areas at the current moment, and a fifth ratio between the maximum value of the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components and the average of the first possibility that other components connected to the component corresponding to the dangerous area are load-bearing components; A third product of the third ratio, the fourth ratio and the fifth ratio is determined as a risk severity index of the component corresponding to the dangerous area at the current moment.

7. The method for simulating construction of assembled buildings according to claim 1, characterized in that: Determining the safety warning level of the construction worker's movement behavior relative to the dangerous area according to the position coordinates of the construction worker at each time, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current time includes: Determine the danger level of the construction worker relative to the danger zone at the current moment according to the position coordinates of the construction worker at each moment, the coordinate center point of the danger zone, and the risk severity index of the component corresponding to the danger zone at the current moment; Determine a sixth ratio between the danger level of the construction worker relative to the dangerous area at the current moment and the maximum danger level of all construction workers relative to each of the dangerous areas at the current moment, as the safety warning level of the construction worker's movement behavior relative to the dangerous area.

8. The method for simulating construction of assembled buildings according to claim 7, characterized in that: Determining the danger level of the construction worker relative to the dangerous area at the current moment according to the position coordinates of the construction worker at each moment, the coordinate center point of the dangerous area, and the risk severity index of the component corresponding to the dangerous area at the current moment includes: Calculate the displacement and moving direction vector of the construction worker at the current moment relative to the previous moment according to the position coordinates of the construction worker at each moment, and determine the distance and direction vector between the construction worker at the current moment and the coordinate center point of the dangerous area according to the position coordinates of the construction worker at the current moment and the coordinate center point of the dangerous area; Determining a vector angle between the moving direction vector and the direction vector; calculating a fourth product between the distance and the vector angle, and calculating a seventh ratio between the displacement and the fourth product; Calculating an eighth ratio between the risk severity index of the component corresponding to the dangerous area at the current moment and the maximum value of the risk severity index of the component corresponding to the dangerous area at each moment; A fifth product of the seventh ratio and the eighth ratio is normalized to obtain the risk level.

9. A prefabricated building simulation construction system, characterized in that: include: A processor and a memory; wherein the memory is used to store a computer program that can be run on the processor; The processor is used to execute the program stored in the memory to implement the steps of the prefabricated building simulation construction method as described in any one of claims 1 to 8.

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