KR101237434B1 - Realistic 3D Architecture Modeling Method using Survey Instrument - Google Patents

Abstract

The present invention relates to a method for modeling a building object using a survey instrument and a computer with a built-in 3D modeling program. The present invention relates to a method for selecting a model of a member to be modeled and generating a "typical model" using a computer. Stage 1; Comparing a "typical model" of the member to be modeled with the real image and selecting measurement points for removing errors from each other; A third step of acquiring the actual coordinate values of the survey member using the instrument for the selected measurement point and transmitting the same to the computer; And a fourth step of generating a “true model” of the surveying member by reflecting the transmitted coordinate values.

Description

Real 3D Architecture Modeling Method using Survey Instrument}

The present invention relates to a building physical modeling method for generating modeling data that accurately reflects the actual shape of a real building by connecting a computer with a built-in instrument and a 3D modeling program.

As shown in FIG. 1, in the case of a modeling method using commercial 3D CAD, if a corresponding dimension and attribute (type of material, material, etc.) value is input from a template of each building member which is made in advance, the model according to the input value is selected. This model is called a parametric design method, and all existing parametric design methods are performed in this way.

However, this method is not applicable to reverse engineering of real buildings. This is because, in the case of real buildings, the dimensions are not determined by uniform values, but reflect the tolerances (constructions) involved in the construction process or variations over time.

In the conventional method of reverse engineering a real building, a conventional survey method such as a tape measure or a flat plate survey is used to measure the building and reflect the value. This method requires considerable manpower and time, and the reliability of the data. On the other hand, there is a problem of 100% dependence on the workforce skill.

Especially in the case of traditional buildings without drawings, the 3D modeling technique is costly and time consuming due to low precision and inefficient working methods. In order to solve these problems, a 3D scan or the like is being promoted, but there are many limitations on the practical use.

When using the 3D scanner to measure the actual building, there are the following limitations.

First, since the 3D scan is measured mainly on the shape of the surface visible at the measurement position, the result is only a simple visualization of the skin. Therefore, the coordinate information of the surface shape alone is not easy to apply to the reverse engineering of the building to create a drawing reflecting the composition of the actual object elements.

Second, the basic purpose of 3D modeling is not to visualize the outer shell but to classify and disassemble elements of 3D modeled buildings and use them as materials for 3D contents. Uneasy.

The present invention created to solve such a problem is not a standardized "typical model" reflecting a general and average value, but a form of a real building by reflecting a value measured from actual position coordinates of each part. Its purpose is to create a "fact model" that represents.

Here, the "typical model" refers to a model having the most general and average form, and the "fact model" refers to a model of a real object as it is.

The configuration of the present invention created to solve the technical problem of the present invention is as follows.

The present invention relates to a method for modeling a building object using a survey instrument and a computer with a built-in 3D modeling program. The present invention relates to a method for selecting a model of a member to be modeled and generating a "typical model" using a computer. Stage 1; Comparing a "typical model" of the member to be modeled with the real image and selecting measurement points for removing errors from each other; A third step of acquiring the actual coordinate values of the survey member using the instrument for the selected measurement point and transmitting the same to the computer; And a fourth step of generating a “true model” of the surveying member by reflecting the transmitted coordinate values.

According to the configuration of the present invention, according to the type of member to be modeled 1) after creating a generalized and standardized "typical model" in a parametric design method 2) to grasp the difference between the actual shape and the "typical model", By receiving the actual coordinate values from the instrument in real time, the coordinates of the "typical model" may be modified to generate a "true model" in which the actual coordinate values are reflected.

Figure 1 illustrates a computer screen presented in the process of creating a "typical model" using a 3D CAD program.
2 is a conceptual diagram of the present invention.
Figure 3 illustrates a computer screen presented in the modeling process according to the present invention, a case of selecting the fear of the hanok as a surveying member.
4 is a flowchart sequentially illustrating a modeling process according to the present invention.
5 is an exemplary screen of a calibration process.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

The present invention relates to a method for modeling an architectural building using the instrument 100, and a computer 200 with a built-in 3D modeling program.

Instrument 100 may be used as a general total station, it should be able to measure the coordinates for each measuring point of the existing building and transmit the value to a computer. In addition, when the instrument 100 selects a specific point of the image shown on the computer 200 screen or the image displayed on the monitor of the instrument 100, the instrument 100 automatically measures the coordinate value of the point. It is preferred that this is provided. On the monitor of the instrument 100, only one such instrument may be used, but if necessary, multiple instruments may be used simultaneously to obtain more accurate coordinate values through statistical processing considering accuracy of measurement coordinate values according to measurement positions or angles. have.

The computer 200 has a 3D modeling program and a database built in (installed), and the database stores the procedures, methods, and modeling rules necessary for the modeling process for each type of modeling member (column, beam, fear, etc.). As such, a database in which modeling rules including procedures and methods necessary for the modeling process are stored for each modeling member is referred to as a "modeling rule base."

The instrument 100 and the computer 200 are connected by wire or wireless communication to transmit control and data to each other, and the coordinate values of the survey member measured by the instrument 100 are transmitted to the computer 200 in real time.

As such, the 3D modeling program embedded in the computer 200 by reflecting the coordinate values transmitted from the instrument 100 is a digital “fact” that reflects the actual shape of the survey member. Model ".

Looking at the modeling process using the instrument 100 and the computer 200 in more detail as follows.

(0) Calibration Step

Calibration for converting / matching coordinate systems to convert the coordinate values of the "model coordinate system" of the 3D modeling program built into the computer 200 and the "measurement coordinate system" transmitted from the instrument 100 and match them into one unified coordinate system ( Calibration) process.

This is to match the "measuring coordinate system" of the instrument 100 with the "model coordinate system" on the 3D modeling program built into the computer 200, in particular to the "real coordinate system" of the building (measurement member) actually measured in the field. Using a single instrument is an important process of unifying the coordinate values of each instrument into a single, consistent coordinate system and matching it to the "real coordinate system".

Here, the "real coordinate system" refers to the coordinate system of the actual target building, the "model coordinate system" refers to the coordinate system of the building model moved on the computer, and the "measurement coordinate system" refers to the coordinate system of the points measured by the instrument.

The calibration method is similar to the LCD touchpad example. LCD touchpad The LCD liquid crystal pixel that outputs (displays) the information and the coordinate system of the touch module that inputs the information. The two or more points (usually four corner points of the screen) that are used as reference points are first calibrated. The more points that are a reference here, the smaller the error. As described above, in the present invention, the LCD liquid crystal is a drawing on a 3D modeling program, and the touch module is a measuring instrument.

The specific method is to specify three or more points on a building or an object that knows the exact coordinate value based on the "real coordinate system", and acquire the coordinate values by using the "survey coordinate system" of each point, and then "surface coordinate value" You can create a formula that converts to "value". As such, there must be a calibration process to determine the equation for converting the "measuring coordinate system" to the "real coordinate system". This process is handled by logic that reduces the error using more than three points (same way as the Least square method) (see Figure 5).

(1) Step 1

A step of selecting a modeling member type to be modeled using the computer 200 and creating a "typical model" is made.

The computer 200 is provided with a 3D modeling program similar to 3D CAD or a modeling program with a function added to suit an existing 3D CAD purpose.

In addition, the computer 200 stores modeling rules including procedures and methods necessary for the modeling process for each type of member to be surveyed (column, beam, fear, etc.). Such a database is called a modeling rule base in the present invention.

Herein, the modeling rule refers to a rule for generating or determining a measurement point for acquiring shape, structure, material, finish, and color information for each type of modeling member, and a rule for determining the shape, structure, and properties of the member to be measured.

In order to select a model of a member to be modeled, there may be a method of clicking a menu displayed on a screen of the computer 200 or a method of directly inputting (or selecting) a name indicating a type of a modeling member.

In addition, a menu for inputting data for determining the properties of the member, including the name of the type of the member to be modeled, the connection hierarchy between the members, and the specific material and color affecting the shape of the member is presented. As a result, data (or selection) for determining the properties are input along with a numerical value for determining the shape of the member. Sometimes this complicated and cumbersome attribute entry can be automatically handled by "Muleine" or "Machine Learning" from past input experience.

In this manner, a "typical model" of the modeling member is generated. Sometimes it is possible to create a "true model" by directly entering the points on the object without the need to create and modify the "typical model".

(2) Step 2

When a "typical model" of the modeling member is created, the difference between the typical model and the physical form is superimposed by overlapping the view of the typical model viewed from the same position with the image of the real object viewed from different directions for comparison with the actual shape of the member. Compare In this case, the real image viewed from various directions may be obtained by using a camera provided in the instrument 100, or may be obtained by installing a separate camera connected to the computer 200.

Through the comparison, if a difference between the "typical model" and the actual image occurs on the screen of the computer 200 or more than a preset allowable error, a point on which the coordinate value correction is necessary to remove the error is selected on the "typical model". .

Selecting a point on the "typical model" of the member to be modeled brings up a menu for inputting the coordinate value of the measurement point together with the measurement point selection display. These measurement points are not limited to the vertices of the typical model, but it is also possible to add and select points on the surface constituting the typical model as needed.

(3) Step 3

Acquiring coordinate values for the selected measuring point using the instrument 100 and transmitting them to a computer. The coordinate values for the measurement points required in the second step are to receive the coordinate values of the corresponding measurement points measured by the instrument 100. That is, when the coordinate values are acquired using the instrument 100 for the measurement point selected in the second step, the coordinate values are transmitted to the computer. At this time, the instrument 100 or the computer 200 processes the coordinate system transformation presented in the calibration process.

This measurement of coordinates is made by selecting an image on a computer screen as a physical image or a point on a typical model, or by selecting it as a point on an image on a monitor on the instrument, and the instrument 100 automatically recognizes the point and acquires the coordinate value, Coordinate values can be obtained by directly measuring a prism target or reflector attached to the target, or by aiming a measuring point of a real building with a laser pointer.

The coordinate values acquired in this way are transmitted to the computer 200 and input in the corresponding columns of the menu presented in the second step.

(4) Step 4

When the coordinate values for the measuring points are completed by repeating the second and third steps, the 3D modeling program built in the computer 200 modifies the points on the "typical model" selected in the second step to reflect the actual coordinate values. Create a "fact model" of the surveying member.

As described above, the specific embodiments of the present invention have been described, but the protection scope of the present invention is not necessarily limited to these embodiments, and various design changes and additions of well-known technology are not limited to the technical scope of the present invention. In the case of deletion, simple numerical limitation, etc., the scope of protection of the present invention should be clarified.

100: an instrument
200: computer

Claims (6)

A method of modeling an architectural building using a survey instrument, and a computer with a built-in 3D modeling program and a database.
Selecting a type of a modeling member to be modeled using a computer and generating a “typical model”;
Comparing a "typical model" of the member to be modeled with the real image and selecting measurement points for removing errors from each other;
A third step of acquiring the actual coordinate values of the survey member using the instrument for the selected measurement point and transmitting the same to the computer; And
A fourth step of generating a “true model” of the survey member by reflecting the transmitted coordinate values;
Three-dimensional building real modeling method using a surveyor, characterized in that comprises a. In claim 1,
3D architectural modeling method using a surveying instrument, characterized in that the modeling rules including the procedures and methods necessary for the modeling process is stored in the database of the computer. The third step of claim 2,
When you select a real image or a point on a typical model on a computer screen or a point on a real image on a monitor on the instrument, the instrument automatically recognizes the point and acquires its coordinates and sends it to the computer in real time. 3D architectural real modeling method using an instrument. The method of claim 2, wherein the third step is ,
The instrument acquires coordinate values by directly measuring a prism target or reflector attached to an actual building, or by measuring a measurement point of an actual building with a laser pointer, and then the instrument transmits the coordinates to a computer in real time. 3D architectural real modeling method using instrument. The method of claim 2, wherein the fourth step,
When the measured coordinates of the measuring point of the survey member are acquired from the instrument and transmitted to the computer, the coordinates of the "typical model" member are modified to generate a "true model" in which the actual coordinate values are reflected. Architectural modeling method. The method of claim 2, wherein the first step is
The instrument further includes a step of inputting data for determining a property of a member including a name indicating the type of the member to be modeled, a connection hierarchy between the members, and a specific material and color affecting the shape of the member. 3D architectural real modeling method using

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