KR-20260064554-A - ELECTRONIC DEVICE FOR DETERMINING DEFECTS OF A CYLINDRICAL SAMPLE, AND OPERATING METHOD THEREOF

KR20260064554AKR 20260064554 AKR20260064554 AKR 20260064554AKR-20260064554-A

Abstract

An electronic device for determining whether a cylindrical sample is defective and a method of operating the same are disclosed. The method of operating the electronic device may include: detecting at least one of a center, boundary, or feature point formed on a cylindrical sample for each of a plurality of two-dimensional images acquired through an X-ray detector while the cylindrical sample passes through an X-ray irradiation area of an X-ray generator; calculating position coordinates of the cylindrical sample for each two-dimensional image and a rotation angle with respect to the cylindrical axis of the cylindrical sample based on the detected center, boundary, or feature point; reconstructing a three-dimensional image of the cylindrical sample using a coordinate table that stores the position coordinates and rotation angle of the cylindrical sample calculated for each two-dimensional image in chronological order and the plurality of two-dimensional images; and determining whether the cylindrical sample is defective by comparing the reconstructed three-dimensional image with a predetermined threshold criterion.

Inventors

김응범
임재현
김정수

Assignees

주식회사 에스지헬스케어

Dates

Publication Date: 20260507
Application Date: 20251023
Priority Date: 20241031

Claims (10)

In electronic devices, X-ray generator that irradiates cone-beam X-rays; X-ray detector including a two-dimensional pixel array; At least one processor; and Memory comprising one or more storage media that store instructions Includes, When the above commands are executed individually or collectively by the at least one processor, the electronic device, For each of the plurality of two-dimensional images acquired through the X-ray detector while the cylindrical sample passes through the X-ray irradiation area of the X-ray generator, at least one of the center, boundary, or feature point formed on the cylindrical sample is detected, and Based on the detected center, boundary, or feature point, the coordinates of the cylindrical sample for each 2D image and the rotation angle of the cylindrical sample with respect to the cylindrical axis are calculated, and A 3D image of the cylindrical sample is reconstructed using a coordinate table that stores the position coordinates and rotation angles of the cylindrical sample calculated for each of the 2D images in chronological order, and the plurality of 2D images. A method for determining whether the cylindrical sample is defective by comparing the above-reconstructed 3D image with a predetermined threshold criterion, Electronic device.
In paragraph 1, The above cylindrical sample is, Moving in a direction parallel to the gate line direction of the X-ray detector on the first friction surface between the X-ray generator and the X-ray detector, Electronic device.
In paragraph 2, The above first friction surface is, Predetermined slope ( It is formed as a slope having ), The friction coefficient of the first friction surface above is, tan( Formed to be greater than ) Electronic device.
In paragraph 2, On the first friction surface above, A mechanism for pushing one side of the above-mentioned cylindrical sample is arranged, and The coefficient of friction for the contact area between the above mechanism and the cylindrical sample is, A coefficient of friction smaller than that between the cylindrical sample and the first friction surface, Electronic device.
In paragraph 2, It further includes a second friction surface disposed on the upper part of the cylindrical sample and moving in the same direction as the direction of movement of the cylindrical sample, The coefficient of friction between the second friction surface and the cylindrical sample is, The same as the coefficient of friction between the first friction surface and the cylindrical sample, Electronic device.
In the method of operating an electronic device, For each of a plurality of two-dimensional images acquired through an X-ray detector while a cylindrical sample passes through an X-ray irradiation area of an X-ray generator, the operation of detecting at least one of the center, boundary, or feature point formed on the cylindrical sample; An operation to calculate the position coordinates of the cylindrical sample for each 2D image and the rotation angle of the cylindrical sample with respect to the cylindrical axis based on the detected center, boundary, or feature point; An operation of reconstructing a 3D image of the cylindrical sample using a coordinate table storing the position coordinates and rotation angles of the cylindrical sample calculated for each of the 2D images in chronological order and the plurality of 2D images; and An operation to determine whether the cylindrical sample is defective by comparing the reconstructed 3D image with a predetermined threshold criterion. A method of operation including
In paragraph 6, The above cylindrical sample is, Moving in a direction parallel to the gate line direction of the X-ray detector on the friction surface between the X-ray generator and the X-ray detector, Method of operation.
In Paragraph 7, The above X-ray detector is, The number of gate lines driven is calculated based on at least one of the movement speed of the cylindrical sample, the movement distance of the cylindrical sample, the number of 2D images required for image reconstruction, and the time taken to read one gate line from the Readout IC. Method of operation.
In paragraph 8, The number of gate lines calculated above is, Proportional to the travel distance of the above cylindrical sample, and Determined inversely proportional to the movement speed of the cylindrical sample, the number of 2D images required for image reconstruction, and the time taken to read the one gate line from the Readout IC, Method of operation.
In paragraph 8, The above X-ray detector is, Controlled so that the number of gate lines actually driven is set to be less than or equal to the number of gate lines calculated above, Method of operation.

Description

ELECTRONIC DEVICE FOR DETERMINING DEFECTS OF A CYLINDRICAL SAMPLE, AND OPERATING METHOD THEREOF The following disclosure relates to the field of industrial radiation inspection, and more specifically, to an electronic device for determining whether a cylindrical sample is defective and a method of operating the same. In the field of industrial radiation inspection, reconstruction into a three-dimensional image is typically required to precisely identify internal defects in a sample. Conventionally, the general method involved picking up a sample moving on a conveyor belt or rail with a separate device, mounting it on a fixed jig and rotating stage inside the inspection equipment to perform multi-angle imaging, and then returning it to the conveyor belt or rail. However, this method was unsuitable for 100% inspection and had practical limitations, as it required time for moving, waiting, and detaching the sample, and was restricted to sample inspection. In particular, for cylindrical samples, precise fixing is required due to the curved surface characteristics, which makes the inspection process longer. Furthermore, if the fixing is loose or there is vibration, there is a problem in that blurring or artificial artifacts are likely to occur in the reconstructed 3D image due to uncertainty in the coordinates during imaging. The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure. In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components. FIG. 1 is a drawing for explaining an electronic device for determining whether a cylindrical sample is defective according to one embodiment. FIG. 2 is a flowchart for explaining an operation method for determining whether a cylindrical sample is defective according to one embodiment. FIG. 3 is a diagram showing the basic inspection structure of a cylindrical sample according to one embodiment. FIG. 4 is a diagram showing a movement structure of a cylindrical sample using an inclined plane according to one embodiment. FIG. 5 is a diagram showing a movement structure of a cylindrical sample using a mechanism according to one embodiment. FIG. 6 is a diagram showing a movement structure of a cylindrical sample using an upper friction surface according to one embodiment. FIG. 7 is a flowchart for explaining an operation method for determining whether a cylindrical sample is defective according to one embodiment. Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, actual implementations are not limited to the specific embodiments disclosed, and the scope of this specification includes modifications, equivalents, or substitutions included in the technical concept described by the embodiments. In this document, each of the following phrases may include any one of the items listed together in the corresponding phrase, or any combination of A, B, and C, or any combination of all of them. Terms such as "A or B," "at least one of A and B," "at least one of A, B, and C," "at least one of A, B, or C," and "a combination of one or more of A, B, and C" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may also be named the first component. When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification. Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to th