KR102123688B1 - Method for 3d scaning - Google Patents

Abstract

According to an embodiment of the present invention, a three-dimensional (3D) scanning method using a plate to which a marker for scanning is attached comprises: a first step of seating an object to be scanned on a seating desk; a second step of binding the plate to the object to be scanned; and a third step of 3D scanning the object to be scanned to obtain first scan data by using the marker for scanning attached to the plate as measurement coordinates. The first scan data is scan data of a portion of the object to be scanned, which does not overlap the plate, in a state in which the plate is bound by the second step.

Description

3D scanning method{METHOD FOR 3D SCANING}

The present invention relates to a 3D scanning method, and more particularly, to a 3D scanning method using an auxiliary plate attached with a marker.

In order to confirm that the manufactured product is accurately manufactured to match the 3D drawing input to the manufacturing apparatus, the manufacturer performs 3D scanning the manufactured article and compares the scan result with the input 3D drawing to perform quality inspection. .

When the manufactured article is, for example, an article such as a door of a vehicle, and a handheld type scanner is used, as shown in FIG. 1, a plurality of markers for scanning (TM) at a constant price on the surface of the article 200 When the 3D scan is performed through a handheld type scanner (SCN) through a matching process of arranging and converting corresponding scan markers into one integrated coordinate system, the accuracy of the scan may be improved.

However, in the case where the same product is continuously produced, when performing quality inspection using a scan marker as described above, it is necessary to attach a scan marker for each product, so it takes a lot of time and money. Very inefficient for inspection.

In this specification, we are going to introduce a 3D scanning method that compensates for these problems.

[Prior literature]

Publication No. 10-2017-0100718

The present invention relates to a 3D scanning method, and more particularly, to a 3D scanning method using an auxiliary plate attached with a marker.

A 3D scanning method using a plate to which a scanning marker is attached according to an embodiment of the present invention includes a first step of seating an object to be scanned on a seating desk, a second step of binding the plate to the object to be scanned, and And a third step of 3D scanning the object to be scanned to obtain scan data by using a scan marker attached to the plate as measurement coordinates, wherein the plate is scanned by the second step. It is the scan data of a portion of the object to be scanned that does not overlap the plate in the bound state.

The plate includes a marker portion to which the marker for scanning is attached and a binding portion to bind the plate to the object to be scanned, and in the second step, the marker portion is disposed spaced apart from the object to be scanned, and the binding portion It is in close contact with the object to be scanned and is bound to the object to be scanned.

The marker portion includes a first portion and one side attached to both corners of the first portion, and includes a second portion extending from the first portion, wherein the binding portion is attached to the other side of the second portion, and the second portion It extends vertically from and the other side of the binding portion is attached to the object to be scanned.

The second part includes at least one or more of a plurality of sub-members that are continuously coupled along one direction, and the sub according to the length between both edges of a portion to which the plate is attached in the object to be scanned in the second step. The member is optionally included in the second part.

According to another embodiment of the present invention, a 3D scanning method using a plate to which a marker for scanning is attached is provided in a first step of seating an object to be scanned on a seating desk, and the plate to be overlapped with a first portion of the object to be scanned. The second step of binding, in the state in which the plate is attached according to the second step, utilizes a scanning marker attached to the plate as measurement coordinates, 3D scans the object to be scanned to obtain first scan data. A third step of acquiring, a fourth step of detaching the plate bound in the second step from the object to be scanned, and after the plate is detached according to the fourth step, overlapping the second part of the object to be scanned In the fifth step of binding the plate as much as possible, in the state in which the plate is attached according to the fifth step, a 3D scan of the object to be scanned is performed by using the scanning marker attached to the plate as measurement coordinates to perform a 2D scan. A sixth step of acquiring scan data, and a seventh step of acquiring final scan data for the entire object to be scanned based on the first scan data and the second scan data.

The first part and the second part do not overlap, and in the seventh step, the final scan data is obtained by merging the scan data for the first part of the first scan data and the second scan data.

Through the 3D scanning method of the present invention, when the user continuously utilizes a plate to which a marker for scanning is attached when performing quality inspection on a product that is continuously produced, a marker for scanning is attached to each product individually during the 3D scanning process. Since there is no need, the quality inspection time and cost are greatly reduced, and the process efficiency for the product can be greatly improved.

1 is a view for explaining a 3D scanning method generally performed through a handheld type scanner.
2 is a view for explaining a 3D scanning method according to an embodiment of the present invention.
3 is a view showing a state in which the plate according to an embodiment of the present invention is seated on the object to be scanned.
4 is a flowchart of a 3D scanning method according to an embodiment of the present invention.
5 is a flowchart of a 3D scanning method according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when it is said that a part "includes" a certain component, this means that other components may be further included instead of excluding other components, unless otherwise stated. The present invention will be described in detail.

2 is a view for explaining a 3D scanning method according to an embodiment of the present invention, and FIG. 3 is a view showing a state in which the plate PLT according to an embodiment of the present invention is seated on the object to be scanned 300 4 is a flowchart of a 3D scanning method according to an embodiment of the present invention.

2 to 4, the 3D scanning method according to an embodiment of the present invention may include a first step of a seating step, a second step of a binding step, and a third step of scanning data acquisition.

In the first step, the object to be scanned 300 may be mounted on a seating desk (not shown). (S11) The seating desk may be varied according to the shape and size of the object to be scanned 300, and scan during scanning It serves to safely support the target object 300.

The object 300 to be scanned may also be various. For example, as illustrated in FIGS. 2 and 3, the object 300 to be scanned may be an automobile door.

In the second step, a plate PLT may be attached to the object 300 to be scanned. (S12)

The scan marker TM described above may be attached to the surface of the plate PLT. The shape of the plate PLT may vary, and is not limited to any particular shape. However, regardless of the shape, a scanning marker TM is attached to the surface of the plate PLT to be used for 3D scanning of the object 300 to be scanned.

In this specification, as illustrated in FIGS. 2 and 3, the object to be scanned 300 is an automobile door, and the shape of the plate PLT is assumed to have an'H' shape.

The plate PLT may include a marker portion and a binding portion.

A marker TM for scanning may be attached to the surface of the marker unit. The binding portion may extend from the marker portion so that the plate PLT is attached to the object to be scanned 300.

In the second step, the marker unit may be disposed spaced apart from the object to be scanned 300. For example, the marker unit may be disposed to be spaced about 30 to 50 mm from the object 300 to be scanned.

The binding unit may be in close contact with the object to be scanned 300 to be attached to the object to be scanned 300. For example, the binding portion extends vertically from the marker portion and is attached to a groove (not shown) formed in the object to be scanned 300, so that the plate PLT can be fixed to the object to be scanned 300.

In the third step, a 3D scan using the plate PLT may be performed through the 3D scanner SCN. In more detail, in the third step, 3D scanning is performed on the object 300 to be scanned by using the scanning marker TM attached to the plate PLT as measurement coordinates, so that the scan data can be obtained. .(S13)

The scan data may be scan data of a portion of the object to be scanned 300 in which the plate PLT is attached by the second step, which does not overlap with the plate PLT. That is, the scan data may be scan data for the remaining portions of the object to be scanned 300 of FIG. 3 except for the portion obscured by the plate PLT.

The user may perform a quality inspection to check whether an error has occurred in manufacturing of a specific portion of the object to be scanned by using the scan data.

In this way, when a user uses a plate (PLT) to perform a quality inspection on a product that is continuously being produced, the user does not need to attach a marker (TM) for scanning to each product during the 3D scanning process, thus the quality inspection time and cost This is greatly reduced, and the process efficiency for the product can be greatly improved.

Hereinafter, the scan data is indicated as the first scan data, and the first scan data is assumed to be scan data when the plate PLT is attached to the first portion of the object 300 to be scanned. As described above, since the first scan data does not reflect the scan data for the first part, according to another embodiment of the present invention, the second scan data as the scan data for the first part in the scan target object 300 To explain the process of obtaining a.

The step of acquiring the second scan data may include the fourth to sixth steps, and in the seventh step, the final scan data may be obtained by utilizing the first scan data and the second scan data, and described in detail below. Do it.

The plate PLT bound in the second step in the fourth step may be detached from the object to be scanned 300 (S14).

After the plate PLT is detached according to the fourth step in the fifth step, the plate PLT may be attached to overlap the second portion of the object 300 to be scanned. (S15) Object to be scanned 300 In the first part and the second part may not overlap. That is, the second portion may be a portion of a portion of the scan target object 300 in FIG. 3 that does not overlap with the plate PLT.

In the sixth step, the object to be scanned 300 is 3D scanned by using the scanning marker TM attached to the plate PLT in a state where the plate PLT is attached according to the fifth step as measurement coordinates. The second scan data may be obtained (S16).

In general, the plate (PLT) in the sixth step may be the same plate (PLT) as the plate (PLT) in the second step, but is not limited to the plate in the second step according to the width and size of the site to be attached ( PLT) and other plates (PLT) may be utilized in the sixth step.

In the seventh step, the final scan data for the entire object to be scanned 300 may be obtained based on the first scan data and the second scan data. (S17) More specifically, in the seventh step, The final scan data may be obtained by merging the scan data for the first portion of the scan target object 300 that is not reflected in the first scan data among the first scan data and the second scan data.

Through this method, the user can easily acquire data of the entire scanned object 300, and quickly perform quality inspection using the final scanned data.

As described above, the plate PLT may vary depending on the type of the object 300 to be scanned, and the plate PLT may be integrally manufactured as illustrated in FIGS. 2 and 3. However, according to the embodiment, the length of the existing plate PLT may be appropriately adjusted according to the width of the portion to which the plate PLT should be attached, and the corresponding embodiment will be described below.

The marker portion of the plate PLT may include a first portion and a second portion.

The first portion may be a central portion of the marker portion. The second part may be a peripheral part of the marker part.

The second part is attached to both edges of the first part, and may extend from the first part. One side of the binding portion is attached to the other side of the second portion, and may extend vertically from the second portion. The other side of the binding portion may be attached to the object 300 to be scanned.

The second part may include at least one of a plurality of sub-members that are continuously coupled along one direction. The plurality of sub-members may be members that can be continuously coupled along one direction in series.

The second part may change its length as the user selects some of the plurality of sub-members. In other words. In the second step, the user may determine the number of sub-members included in the second part according to the length between both edges of the part to which the plate PLT is attached in the object to be scanned 300.

When performing a 3D scan operation on similar manufactured products, the user controls one plate PLT by adjusting the number of sub-members to be included in the second part according to the width of the portion where the plate PLT is to be mounted. Through this, it is possible to perform a plurality of 3D scan operations, so the efficiency of quality inspection can be further improved.

The above-described embodiments are for illustration only, and those having ordinary knowledge in the technical field to which the above-described embodiments belong can easily be modified into other specific forms without changing the technical idea or essential features of the above-described embodiments. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected through the present specification is indicated by the claims, which will be described later, rather than the detailed description, and should be interpreted to include all modified or modified forms derived from the meaning and scope of the claims and their equivalent concepts.

PLT: Plate 300: Object to be scanned
TM: Marker for scanning SCN: 3D scanner

Claims (6)

In the 3D scanning method using a plate with a scanning marker attached,
A first step of seating an object to be scanned on a seating desk;
A second step of binding the plate to the object to be scanned; And
And a third step of 3D scanning the object to be scanned to obtain scan data by using a scan marker attached to the plate as measurement coordinates,
The scan data is scan data of a portion of the object to be scanned that does not overlap the plate in the state where the plate is attached by the second step,
The plate includes a marker portion to which the scan marker is attached and a binding portion to bind the plate to the object to be scanned,
In the second step, the marker unit is spaced apart from the object to be scanned. According to claim 1,
In the second step, the binding portion is in close contact with the object to be scanned, and a 3D scanning method characterized in that it is attached to the object being scanned. According to claim 2,
The marker portion
Part 1; And
One side is attached to both corners of the first portion, and includes a second portion extending from the first portion,
One side of the binding portion is attached to the other side of the second portion, extending vertically from the second portion,
3D scanning method, characterized in that the other side of the binding portion is attached to the object to be scanned. According to claim 3,
The second part includes at least one or more of a plurality of sub-members that are continuously coupled along one direction,
3D scanning method, characterized in that in the second step, the sub-member is selectively included in the second part according to a length between both edges of a portion where the plate is attached to the object to be scanned. In the 3D scanning method using a plate with a scanning marker attached,
A first step of seating an object to be scanned on a seating desk;
A second step of binding the plate to overlap the first portion of the object to be scanned;
A third step of acquiring first scan data by 3D scanning the object to be scanned by using a scan marker attached to the plate as measurement coordinates in a state where the plate is attached according to the second step;
A fourth step of detaching the plate bound in the second step from the object to be scanned;
A fifth step of binding the plate so that it overlaps the second portion of the object to be scanned after the plate is detached according to the fourth step;
A sixth step of acquiring second scan data by 3D scanning the object to be scanned by using a scanning marker attached to the plate as measurement coordinates in a state where the plate is attached according to the fifth step; And
And a seventh step of acquiring final scan data for the entire object to be scanned based on the first scan data and the second scan data. The method of claim 5,
The first portion and the second portion do not overlap,
3D scanning method characterized in that in the seventh step, the final scan data is obtained by merging the scan data for the first portion of the first scan data and the second scan data.

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