CN113987622A - Method for automatically acquiring building layer height parameters from shaft elevation map - Google Patents
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Abstract
The invention discloses a method for automatically acquiring a building layer height parameter from an axial elevation diagram, which comprises the following steps: s1, initializing a drawing, selecting an axis elevation drawing of a project building for extracting elevation information of the building, and exploding all picture blocks in a range needing to extract the elevation information into a basic object; s2, reading all elevation objects in the range of the elevation information needing to be extracted; s3, acquiring elevation data, and respectively acquiring the elevation data for a single drawing or a multi-tower drawing within the range of extracting the elevation information according to the requirement: and S4, calculating the layer height data, and obtaining the layer height data by calculating the difference value of the adjacent elevation data. Compared with the prior art, the method can automatically acquire the building floor height parameters of one or more buildings from the shaft elevation map, and can assist in solving the problem of automatic global positioning of a single modeling object in a project building in the BIM modeling process by taking the floor height parameters as datum data.
Description
Technical Field
The invention belongs to the technical field of building information models, and particularly relates to a method for automatically acquiring a building layer height parameter from an axial elevation map.
Background
In the field of construction, building information modeling and management (BIM) is widely recognized as a new tool that can improve production efficiency and delivery quality. The BIM may provide a visual building model for a building project. In the prior art, manual die-turning is performed according to the two-dimensional CAD drawing content, so that a BIM model is formed, the time is long, and a large amount of financial resources and material resources are required to be consumed. Therefore, it is of great significance to develop a technology capable of automatically converting the CAD construction drawing into the BIM model.
In developing a technology capable of automatically converting a CAD (computer-aided design) construction drawing into a BIM (building information modeling) model, the height of a building model such as a slab and a beam column on each floor needs to be positioned by using floor height parameters as reference data. Therefore, there is a need to solve the problem of automatically acquiring the building layer height parameter from the two-dimensional map.
In the prior art, chinese patent CN201910252414 discloses a vertical drawing identification method for converting a building drawing into a three-dimensional BIM model, which finds out a floor height corresponding to each floor in a vertical drawing through an identified elevation symbol. Creating a dictionary containing all floor names, wherein keys of the dictionary are the floor names, and the value is the floor height of the floor; in the elevation map, for each floor name of the teaching building, corresponding characters are found. If 1F, the character with the character string equal to 1F is found in the elevation. After the characters are found, traversing all the elevation symbols, and judging whether the Euclidean distance between the three-dimensional coordinate point of one elevation symbol and the three-dimensional coordinate point of the floor characters is less than three times of the height of the characters, wherein the abscissa of the characters is less than the abscissa of the elevation symbol, and the ordinate of the characters is greater than the ordinate of the elevation symbol. If the elevation symbol meets the condition, the elevation symbol is successfully matched with the floor characters; and writing the elevation numerical value corresponding to the elevation symbol into a dictionary.
The method in the prior art has the defects that the method is poor in universality, can only extract the layer height parameters of a single piece of multi-tower drawing, and cannot directly solve the problem of extracting the layer height parameters of the one piece of multi-tower drawing.
Disclosure of Invention
Technical problem to be solved
Based on the method, the method for automatically acquiring the building layer height parameter from the shaft elevation map aims to solve the technical problem that the layer height parameter extraction of the multi-tower drawing cannot be solved due to poor universality of the layer height acquisition method in the prior art.
(II) technical scheme
In order to solve the technical problem, the invention provides a method for automatically acquiring a building layer height parameter from an axial elevation map.
The invention relates to a method for automatically acquiring a building layer height parameter from an axial elevation diagram, which has the overall inventive concept that: the elevation object and the size marking object are firstly identified, then the elevation object and the size marking object are combined, the elevation object corresponding to the longest dimension line on the left side or the right side of the building primitive is utilized, the elevation object irrelevant to the floor height (such as the elevation corresponding to the roof floor) is eliminated, and the elevation object corresponding to the longest dimension line is reserved. And grouping the elevations, determining groups of the objects needing to be reserved by identifying whether the drawings are single drawings or multi-tower drawings, and calculating the layer height data by utilizing the elevation objects of the groups.
The invention provides a method for automatically acquiring a building layer height parameter from an axial elevation diagram, which comprises the following steps:
s1, initializing drawing
S11, selecting an axis elevation image of the project building for extracting elevation information of the building, and determining a range in which the elevation information needs to be extracted, wherein the range in which the elevation information needs to be extracted comprises building primitives and size marking primitives;
s12, frying all the picture blocks in the range of the elevation information to be extracted into basic objects;
s2, reading all elevation objects in the range of the elevation information needing to be extracted;
s3, acquiring elevation data, and respectively acquiring the elevation data for a single drawing or a multi-tower drawing within the range of extracting the elevation information according to the requirement:
when the drawing is a single drawing, finding out the longest dimension line on the left side or the right side of the building primitive, finding out elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation values on the elevation objects are a group of elevation data;
when the drawing is a multi-tower drawing, finding out the longest dimension line which is most adjacent to the graphic primitive of each building, and finding out elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation values on the elevation objects are a group of elevation data;
s4, calculating layer height data
And calculating the difference value of the adjacent elevation data to obtain the layer height data.
Preferably, in step S3, after the altitude data is acquired, a step of eliminating interference from the altitude data is further included.
Preferably, the step of eliminating interference from the elevation data includes: analyzing the difference value of two adjacent elevation data in each set of elevation data, and if the difference value is smaller than a preset height, excluding one elevation data; the exclusion method comprises the following steps:
if one of the two elevation data is positive or negative zero, the other elevation data is excluded;
if one of the two elevation data is a positive value and the other one is a negative value, excluding the negative value;
if one of the two elevation data has a corresponding floor height line in the range in which the elevation information needs to be extracted, and the other does not, the corresponding floor height line is excluded.
Preferably, the preset height can be set according to the standard floor elevation of the building, and the numerical value of the preset height is smaller than the standard floor elevation of the building.
Preferably, after step S1 and before step S3, the method further includes the step of determining whether the drawing is a single drawing or a multi-tower drawing:
along the height direction of the shaft elevation map, finding the longest dimension line on the left side in the range needing to extract elevation information and setting the longest dimension line as L1, finding the longest dimension line on the right side in the range needing to extract elevation information and setting the longest dimension line as L2, comparing the lengths of L1 and L2, taking the shorter one of L1 and L2, and taking a point C on the shorter dimension line as a horizontal auxiliary line, wherein the distance from the point C to the bottom end of the shorter dimension line is 50-80% of the total length of the dimension line;
the intersection point of the horizontal auxiliary line and the leftmost side of the building graphic element in the range needing to extract the elevation information is A1, and the intersection point of the horizontal auxiliary line and the rightmost side of the building graphic element in the range needing to extract the elevation information is A2;
on line segment A1a 2: if a continuous line segment which is longer than or equal to 10m and does not intersect with other basic objects in the range needing to extract the elevation information does not exist, judging that the drawing in the range needing to extract the elevation information is a single drawing;
on line segment A1a 2: if a continuous line segment with the length being more than or equal to 10m and the intersection points with other basic objects in the range needing to extract the elevation information exists, and a vertical auxiliary line is made through the midpoint of the continuous line segment, wherein the upward part of the vertical auxiliary line is not intersected with other basic objects in the range needing to extract the elevation information; and judging that the drawing in the range of the elevation information needing to be extracted is a multi-tower drawing.
Preferably, in the step of judging whether the drawing is a single drawing or a multi-tower drawing, the object to which the vertical auxiliary line is first handed down is the top of the bottom business layer.
Preferably, the step of determining whether the drawing is a single drawing or a multi-tower drawing further comprises the step of setting the multi-tower drawing in groups: a multi-tower drawing is divided into 0 group, 1 group and 2-N groups, wherein N is the number of buildings, 0 group is a bottom commercial floor, 1 group is the leftmost building in the range needing to extract elevation information, and 2-N groups are the 2-N buildings from left to right in the range needing to extract elevation information.
Preferably, the axis elevation of the project building in step S11 is a.dwg formatted file; the basic object in step S12 includes: circle, straight line, multiple line segments, polygon, text, size line; when the range of the elevation information to be extracted in the step S12 includes the tile definition with the attribute, the attribute characters need to be restored; step S12 is followed by: and S13, zeroing all Z coordinates of the objects in the range of the elevation information to be extracted.
Preferably, in step S11, the determining the range in which the altitude information needs to be extracted includes two ways:
the first method is as follows: cutting the axis elevation of the project building into a file only containing a single picture frame through the range determined by each picture frame in the axis elevation of the project building;
the second method comprises the following steps: the range of elevation information to be extracted is determined by manually framing a single frame in the axis elevation map of the project building.
Preferably, the method further comprises the following steps before step S1: checking whether a plan of a project building standard layer can be normally opened by using AutoCAD software and normally displaying; when the plan of the project building standard layer is a file in the dwg format, which is drawn by non-original CAD software, the file needs to be converted into a native file.
(III) advantageous effects
Compared with the prior art, the method for automatically acquiring the building layer height parameter from the shaft elevation map has the advantages that:
compared with the prior art, the method for automatically acquiring the building floor height parameters from the shaft elevation map can automatically acquire the building floor height parameters of one or more buildings from the shaft elevation map, and can be applied to the BIM model technology by taking the floor height parameters as datum data, so that the heights of the building models such as the layer plates, the beam columns and the like of each floor can be positioned, and the problem of automatic global positioning of a single modeling object in a project building in the BIM modeling process can be solved. Meanwhile, the method can also assist in quickly filtering the shaft network information in the map recognizing process of the architectural diagram structure diagram; and establishing a projection relation of the elevation map by corresponding the elevation information with the axis network.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 is a method for automatically acquiring a building layer height parameter from an axis elevation view according to an embodiment of the present invention: single drawing schematic (single tower);
fig. 2 is a method for automatically acquiring a building layer height parameter from an axis elevation view according to an embodiment of the present invention: double drawing schematic (double tower);
fig. 3 is a method for automatically acquiring a building layer height parameter from an axis elevation view according to an embodiment of the present invention: a schematic diagram for grouping the double drawings;
fig. 4 is a method for automatically acquiring a building layer height parameter from an axis elevation view according to an embodiment of the present invention: schematic diagram for interference elimination of elevation data;
FIG. 5 is a schematic diagram of partial story height data acquired using a method of automatically acquiring building story height parameters from an elevation view of an axis according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for automatically acquiring a building layer height parameter from an elevation view of a shaft according to an embodiment of the present invention;
fig. 7 is a method for automatically acquiring a building layer height parameter from an axis elevation view according to an embodiment of the present invention: and judging whether the drawing is a single drawing or a multi-tower drawing.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; the two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through the inside of the two elements, or "in transmission connection", that is, connected in a power manner through various suitable manners such as belt transmission, gear transmission, or sprocket transmission. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A method for automatically obtaining a building layer height parameter according to the present invention will be further described with reference to fig. 1-6.
Referring to fig. 6, the present invention discloses a method for automatically obtaining a building floor height parameter from an axial elevation, comprising the following steps:
s1, initializing drawing
S11, selecting an axis elevation image of the project building for extracting elevation information of the building, and determining the range in which the elevation information needs to be extracted, wherein the range in which the elevation information needs to be extracted comprises building primitives and size marking primitives.
And S12, frying all the picture blocks in the range of the elevation information to be extracted into a basic object.
And S2, reading all elevation objects in the range in which the elevation information needs to be extracted.
S3, acquiring elevation data, and respectively acquiring the elevation data for a single drawing or a multi-tower drawing within the range of extracting the elevation information according to the requirement:
when the drawing is a single drawing, finding out the longest dimension line on the left side or the right side of the building primitive, finding out the elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation value on the elevation object is a group of elevation data.
When the drawing is a multi-tower drawing, finding out the longest dimension line which is most adjacent to the graphic primitive of each building, and finding out the elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation values on the elevation objects are a group of elevation data.
S4, calculating layer height data
And calculating the difference value of the adjacent elevation data to obtain the layer height data.
In the present embodiment, according to the actual situation of the axial elevation map, the drawing is divided into a single drawing (as shown in fig. 1, a single tower) and a multi-tower drawing (as shown in fig. 2, a double drawing, a double tower), and the corresponding elevation object is found according to the position relationship with the longest dimension.
And (4) taking any one of the left and right groups (the default left side) for a single span, and acquiring a group of elevation data through the found corresponding elevation object.
And (4) taking the left elevation of the scale on the left side of the plurality of buildings, taking the right elevation of the scale on the right side, and judging to take the outer side according to the elevation and the building distance in the middle. According to the found corresponding elevation objects and a group of corresponding elevation objects in each set of elevation objects, according to elevation information in the elevation objects, each group of elevation objects can correspondingly obtain a group of elevation data (the reason that the elevation data of each set are obtained is that the elevation data of each set are different in one multi-tower drawing), and a group of elevation information is obtained from each group of elevation data, so that the elevation information of each set in one multi-tower drawing can be obtained.
On the basis of the elevation information obtained in the above manner, the layer height data can be obtained by subtracting adjacent elevation data. The elevation data and the layer height data can be applied to the BIM model technology, and the heights of building models such as laminates and beam columns of each layer in a single or multiple buildings are positioned.
According to an embodiment of the present invention, in step S3, after the altitude data is acquired, a step of eliminating interference from the altitude data is further included.
In the present embodiment, since the elevation is formed at the position such as the settlement in addition to the elevation at the position of the story height in the axial elevation map, and this type of information is interference information of the story height parameter of the building, if only the elevation information of the story height needs to be acquired, the interference information needs to be eliminated.
According to the specific embodiment of the invention, the step of eliminating interference on the elevation data comprises the following steps: analyzing the difference value of two adjacent elevation data in each set of elevation data, and if the difference value is smaller than a preset height, excluding one elevation data; the exclusion method comprises the following steps:
if one of the two elevation data is positive or negative zero, the other is excluded.
If one of the two elevation data is positive and the other is negative, the negative is excluded.
If one of the two elevation data has a corresponding floor height line in the range in which the elevation information needs to be extracted, and the other does not, the corresponding floor height line is excluded.
More specifically, the preset height may be set according to a standard floor elevation of the building, and a numerical value of the preset height is smaller than the standard floor elevation of the building.
In this embodiment, the step of performing interference elimination on the altitude data is specifically described as follows: analyzing the height difference of every two elevations of each group, and if the height difference is too close, removing one elevation, wherein the removing conditions comprise: whether one of them is positive or negative zero (excluding the other), whether one of them is positive or negative (excluding the opposite), and whether it corresponds to a high-line of the layer (excluding none).
Further, in the specific implementation, a preset height is set according to the floor height of the building, when two elevation objects are too close, it is determined that the other elevation object is not the elevation object corresponding to the floor height, and one of the elevation data needs to be excluded. Specifically, according to the condition of interference elevation information in the shaft elevation map, the elevation data of positive and negative zero elevation, the negative elevation of the settlement position and the elevation data without the corresponding layer elevation are eliminated, so that the precision of data extraction can be further improved.
As shown in fig. 4, for the adjacent elevation data ± 0.000 and-0.150, the difference is significantly smaller than the floor height, and belongs to 2 elevation data with a short distance, one of them needs to be excluded, and according to the above rule, -0.150 belongs to the disturbance elevation data, and needs to be excluded.
According to an embodiment of the present invention, after step S1 and before step S3, the method further includes the step of determining whether the drawing is a single drawing or a multi-tower drawing:
as shown in fig. 7, along the height direction of the axial elevation view, the longest dimension line is found on the left side in the range where the altitude information needs to be extracted and is set as L1, the longest dimension line is found on the right side in the range where the altitude information needs to be extracted and is set as L2, the lengths of L1 and L2 are compared, the shorter length of L1 and L2 is taken, and the C point on the shorter dimension line is used as the horizontal auxiliary line, and the distance from the C point to the bottom end of the shorter dimension line is 50% -80% of the total length of the dimension line.
The intersection point of the horizontal auxiliary line and the leftmost side of the building primitive in the range in which the elevation information needs to be extracted is A1, and the intersection point of the horizontal auxiliary line and the rightmost side of the building primitive in the range in which the elevation information needs to be extracted is A2.
On line segment A1a 2: and if a continuous line segment which is longer than or equal to 10m and does not intersect with other basic objects in the range needing to extract the elevation information does not exist, judging that the drawing in the range needing to extract the elevation information is a single drawing.
On line segment A1a 2: if a continuous line segment with the length being more than or equal to 10m and the intersection points with other basic objects in the range needing to extract the elevation information exists, and a vertical auxiliary line is made through the midpoint of the continuous line segment, wherein the upward part of the vertical auxiliary line is not intersected with other basic objects in the range needing to extract the elevation information; and judging that the drawing in the range of the elevation information needing to be extracted is a multi-tower drawing.
In the embodiment, the shaft elevation graph is analyzed according to the drawing rules of the shaft elevation graph, and the judgment of whether the shaft elevation graph is a single piece of drawing or a multi-tower drawing can be automatically realized through the method. The number of groups of the layer height data needing to be acquired is determined according to the information. The efficiency and the accuracy of the method for automatically acquiring the building layer height parameters from the shaft elevation map are improved.
As shown in fig. 5, a set of elevation and floor height parameters is automatically obtained from the shaft elevation of the building by the method for automatically obtaining the floor height parameters from the shaft elevation of the building of the present invention.
According to the embodiment of the invention, in the step of judging whether the drawing is a single drawing or a multi-tower drawing, the object which is firstly crossed downwards by the vertical auxiliary line is the top of the bottom commercial layer.
In general, the layer height of the bottom business layer is different from that of the upper labeling layer, and in this embodiment, after the top of the bottom business layer is automatically found by the method, the range of the bottom business layer can be found. It is convenient to obtain the layer height data of the bottom business layer.
According to the specific implementation mode of the invention, the step of judging whether the drawing is a single drawing or a multi-tower drawing further comprises the step of setting the multi-tower drawing in groups: a multi-tower drawing is divided into 0 group, 1 group and 2-N groups, wherein N is the number of buildings, 0 group is a bottom commercial floor, 1 group is the leftmost building in the range needing to extract elevation information, and 2-N groups are the 2-N buildings from left to right in the range needing to extract elevation information.
As shown in fig. 3, when N is equal to 2, the drawing is a double drawing, and in this case, by means of the above method, one multi-tower drawing is divided into 0 group, 1 group and 2 group, where 0 group is a bottom business floor, 1 group is the leftmost building in the range where the elevation information needs to be extracted, and 1 group is the rightmost building in the range where the elevation information needs to be extracted.
In the embodiment, if the drawing in the range in which the elevation information needs to be extracted is judged to be a single drawing, a group of elevations needs to be obtained; and if the drawings in the range needing to extract the elevation information are judged to be N drawings, acquiring N +1 groups of elevations. Wherein each building corresponds to a group of elevation data, and 0 group corresponds to a group of elevation data for the bottom business layer. By the method, similar elevation data can be grouped into the same group, so that the elevation data grouping is more in line with the actual situation.
According to an embodiment of the present invention, the axis elevation of the project building in step S11 is a.dwg formatted file. The basic object in step S12 includes: circle, straight line, multiple line segments, polygon, text, dimension line. When the range of the altitude information to be extracted in step S12 includes the tile definition with the attribute, the attribute text needs to be restored. Step S12 is followed by: and S13, zeroing all Z coordinates of the objects in the range of the elevation information to be extracted.
More specifically, the following steps are also included before step S1: checking whether a plan of a project building standard layer can be normally opened by using AutoCAD software and normally displaying; when the plan of the project building standard layer is a file in the dwg format, which is drawn by non-original CAD software, the file needs to be converted into a native file.
In the embodiment, the format of the axis elevation graph of the project building and the primitives in the graph are processed, so that the normal reading of information is facilitated, and the situations of unsmooth reading or omission are avoided.
According to the embodiment of the present invention, in step S11, the determination of the range in which the altitude information needs to be extracted includes two ways:
the first method is as follows: the axis elevation of the project building is cut into a file containing only a single frame by the range determined by each frame in the axis elevation of the project building.
The second method comprises the following steps: the range of elevation information to be extracted is determined by manually framing a single frame in the axis elevation map of the project building.
In specific implementation, one of the two modes can be selected according to the actual situation of the drawing and the convenience of operation.
It should be noted that, the "multi-tower" structure in the present invention refers to a project building with the following features: there are more than two towers that are not related to each other, but the bottom commercial floors of these towers are connected. The single-span structure in the invention refers to a project building with the following characteristics: only one independent tower building is provided.
It should be further noted that: step S2 of the present invention is to read all the altitude objects within the range in which the altitude information needs to be extracted. In the related art, chinese patent application No. 202111047967.1 describes a method for identifying elevation marks of buildings and structural diagrams. This patent describes in detail how all elevation objects can be automatically identified from the drawing. In addition, chinese patent CN201910252414 discloses an elevation recognition method for converting a building drawing into a three-dimensional BIM model, and specifically discloses a recognition method for an elevation mark. Therefore, step S2 can be realized without the problem of insufficient disclosure.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A method for automatically acquiring a building layer height parameter from an axial elevation map is characterized by comprising the following steps:
s1, initializing drawing
S11, selecting an axis elevation image of the project building for extracting elevation information of the building, and determining a range in which the elevation information needs to be extracted, wherein the range in which the elevation information needs to be extracted comprises building primitives and size marking primitives;
s12, frying all the picture blocks in the range of the elevation information to be extracted into basic objects;
s2, reading all elevation objects in the range of the elevation information needing to be extracted;
s3, acquiring elevation data, and respectively acquiring the elevation data for a single drawing or a multi-tower drawing within the range of extracting the elevation information according to the requirement:
when the drawing is a single drawing, finding out the longest dimension line on the left side or the right side of the building primitive, finding out elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation values on the elevation objects are a group of elevation data;
when the drawing is a multi-tower drawing, finding out the longest dimension line which is most adjacent to the graphic primitive of each building, and finding out elevation objects which are positioned on one side of the dimension line and are sequentially arranged along the length direction of the dimension line, wherein the elevation values on the elevation objects are a group of elevation data;
s4, calculating layer height data
And calculating the difference value of the adjacent elevation data to obtain the layer height data.
2. The method for automatically acquiring the building floor height parameter from the shaft elevation map according to claim 1, wherein the step of obtaining the elevation data in step S3 further comprises the step of eliminating interference from the elevation data.
3. The method of automatically deriving a building layer height parameter from an elevation map of claim 2, wherein the step of interference rejection of the elevation data comprises: analyzing the difference value of two adjacent elevation data in each set of elevation data, and if the difference value is smaller than a preset height, excluding one elevation data; the exclusion method comprises the following steps:
if one of the two elevation data is positive or negative zero, the other elevation data is excluded;
if one of the two elevation data is a positive value and the other one is a negative value, excluding the negative value;
if one of the two elevation data has a corresponding floor height line in the range in which the elevation information needs to be extracted, and the other does not, the corresponding floor height line is excluded.
4. The method of claim 3, wherein the preset height is set according to a standard floor elevation of the building, and the preset height is smaller than the standard floor elevation of the building.
5. The method for automatically acquiring the floor height parameter of the building from the shaft elevation view according to any one of claims 1 to 4, further comprising the step of judging whether the drawing is a single drawing or a multi-tower drawing after the step S1 and before the step S3:
along the height direction of the shaft elevation map, finding the longest dimension line on the left side in the range needing to extract elevation information and setting the longest dimension line as L1, finding the longest dimension line on the right side in the range needing to extract elevation information and setting the longest dimension line as L2, comparing the lengths of L1 and L2, taking the shorter one of L1 and L2, and taking a point C on the shorter dimension line as a horizontal auxiliary line, wherein the distance from the point C to the bottom end of the shorter dimension line is 50-80% of the total length of the dimension line;
the intersection point of the horizontal auxiliary line and the leftmost side of the building graphic element in the range needing to extract the elevation information is A1, and the intersection point of the horizontal auxiliary line and the rightmost side of the building graphic element in the range needing to extract the elevation information is A2;
on line segment A1a 2: if a continuous line segment which is longer than or equal to 10m and does not intersect with other basic objects in the range needing to extract the elevation information does not exist, judging that the drawing in the range needing to extract the elevation information is a single drawing;
on line segment A1a 2: if a continuous line segment with the length being more than or equal to 10m and the intersection points with other basic objects in the range needing to extract the elevation information exists, and a vertical auxiliary line is made through the midpoint of the continuous line segment, wherein the upward part of the vertical auxiliary line is not intersected with other basic objects in the range needing to extract the elevation information; and judging that the drawing in the range of the elevation information needing to be extracted is a multi-tower drawing.
6. The method for automatically acquiring the floor height parameter of a building from an axial elevation drawing as claimed in claim 5, wherein in the step of judging whether it is a single drawing or a multi-tower drawing, the object to which the vertical auxiliary line is first crossed downward is the top of the bottom commercial floor.
7. The method of automatically obtaining the floor height parameter from the shaft elevation view according to claim 6, wherein the step of determining whether the drawing is a single drawing or a multi-tower drawing further comprises the step of grouping and setting one multi-tower drawing: a multi-tower drawing is divided into 0 group, 1 group and 2-N groups, wherein N is the number of buildings, 0 group is a bottom commercial floor, 1 group is the leftmost building in the range needing to extract elevation information, and 2-N groups are the 2-N buildings from left to right in the range needing to extract elevation information.
8. The method for automatically obtaining a building floor height parameter from an elevation view of a shaft according to claim 1,
the shaft elevation of the project building in the step S11 is a document in dwg format;
the basic object in step S12 includes: circle, straight line, multiple line segments, polygon, text, size line;
when the range of the elevation information to be extracted in the step S12 includes the tile definition with the attribute, the attribute characters need to be restored;
step S12 is followed by: and S13, zeroing all Z coordinates of the objects in the range of the elevation information to be extracted.
9. The method for automatically acquiring the floor height parameter from the shaft elevation map as claimed in claim 1, wherein the step S11, determining the range of the elevation information to be extracted includes two ways:
the first method is as follows: cutting the axis elevation of the project building into a file only containing a single picture frame through the range determined by each picture frame in the axis elevation of the project building;
the second method comprises the following steps: the range of elevation information to be extracted is determined by manually framing a single frame in the axis elevation map of the project building.
10. The method for automatically obtaining the floor height parameter from the shaft elevation map as claimed in claim 1, further comprising the following steps before step S1: checking whether a plan of a project building standard layer can be normally opened by using AutoCAD software and normally displaying; when the plan of the project building standard layer is a file in the dwg format, which is drawn by non-original CAD software, the file needs to be converted into a native file.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390088A (en) * | 2013-07-31 | 2013-11-13 | 浙江大学 | Full-automatic three-dimensional conversion method aiming at grating architectural plan |
| CN109993827A (en) * | 2019-03-29 | 2019-07-09 | 宁波睿峰信息科技有限公司 | A kind of elevation recognition methods that architectural drawing is converted to three-dimensional BIM model |
| US20190251209A1 (en) * | 2018-02-09 | 2019-08-15 | Guangzhou University | Method for Automatic Modeling of an Architecture Based on an Architectural Drawing |
| CN110210120A (en) * | 2019-05-30 | 2019-09-06 | 北京工业大学 | Railway engineering automation modeling method based on parametrization |
| CN111191310A (en) * | 2019-12-25 | 2020-05-22 | 广联达科技股份有限公司 | Method, system and medium for constructing external scaffold based on rapid arrangement of preferential blocks |
| CN112183301A (en) * | 2020-09-23 | 2021-01-05 | 武汉大势智慧科技有限公司 | Building floor intelligent identification method and device |
| CN112818460A (en) * | 2021-03-16 | 2021-05-18 | 北京图乘科技有限公司 | Intelligent building rollover method from two-dimensional drawing to three-dimensional model |
-
2021
- 2021-09-26 CN CN202111126175.3A patent/CN113987622B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390088A (en) * | 2013-07-31 | 2013-11-13 | 浙江大学 | Full-automatic three-dimensional conversion method aiming at grating architectural plan |
| US20190251209A1 (en) * | 2018-02-09 | 2019-08-15 | Guangzhou University | Method for Automatic Modeling of an Architecture Based on an Architectural Drawing |
| CN109993827A (en) * | 2019-03-29 | 2019-07-09 | 宁波睿峰信息科技有限公司 | A kind of elevation recognition methods that architectural drawing is converted to three-dimensional BIM model |
| CN110210120A (en) * | 2019-05-30 | 2019-09-06 | 北京工业大学 | Railway engineering automation modeling method based on parametrization |
| CN111191310A (en) * | 2019-12-25 | 2020-05-22 | 广联达科技股份有限公司 | Method, system and medium for constructing external scaffold based on rapid arrangement of preferential blocks |
| CN112183301A (en) * | 2020-09-23 | 2021-01-05 | 武汉大势智慧科技有限公司 | Building floor intelligent identification method and device |
| CN112818460A (en) * | 2021-03-16 | 2021-05-18 | 北京图乘科技有限公司 | Intelligent building rollover method from two-dimensional drawing to three-dimensional model |
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