KR-20260067303-A - Imaging device for the internal surface of cylindrical battery product with mirror tilting

KR20260067303AKR 20260067303 AKR20260067303 AKR 20260067303AKR-20260067303-A

Abstract

An inner surface imaging device for a cylindrical battery product capable of tilting a mirror according to one embodiment of the present invention may include a transfer module for transferring a cylindrical battery product in an upright position with an open top surface to an imaging position, a camera module located above the imaging position for imaging the cylindrical battery product transferred to the imaging position, and an inner surface reflective mirror module located between the imaging position and the camera module for illuminating the inner surface of the cylindrical battery product.

Inventors

김성기
류지만
가인호
최상진

Assignees

(주)인스케이프

Dates

Publication Date: 20260512
Application Date: 20250905
Priority Date: 20241105

Claims (9)

A transfer module for transferring an upright cylindrical battery product with an open top surface to a shooting position; A camera module positioned above the above shooting position and photographing the cylindrical battery product transferred to the above shooting position; and It includes an inner surface reflective mirror module positioned between the above shooting position and the above camera module, which illuminates the inner surface of the cylindrical battery product; The above-mentioned inner surface reflective mirror module is, A plurality of mirrors arranged around a height axis perpendicular to the above shooting position; and An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, comprising a mirror angle adjuster for adjusting the angle formed by each of the mirrors with respect to the height axis.
In paragraph 1, Each of the above mirrors, An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, provided with an inclined shape that protrudes further toward the height axis as it approaches the bottom.
In paragraph 2, The above mirror angle adjuster is, When the above cylindrical battery product is transferred to the above shooting position, each of the above mirrors is set to be adjusted from a first angle to a second angle or from a second angle to a first angle, An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, wherein the first angle is an angle at which the mirror illuminates the lower part of the inner surface of the cylindrical battery product, and the second angle is an angle at which the mirror illuminates the upper part of the inner surface of the cylindrical battery product.
In paragraph 3, An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, further comprising a detection sensor for detecting the cylindrical battery product transferred to the above imaging position.
In paragraph 1, An inner side imaging device for a cylindrical battery product capable of tilting a mirror, further comprising a lifting module that changes the relative distance between the inner side reflection mirror module and the transfer module.
In paragraph 5, The above lifting module is, An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, comprising: a stage formed to be vertically movable and on which the cylindrical battery product located at the above imaging position is seated.
In paragraph 5, The above lifting module is, An inner side imaging device for a cylindrical battery product capable of tilting the mirror, comprising: a mirror lifting actuator for adjusting the height of the inner side reflection mirror module.
In Paragraph 7, The above lifting module is, An inner side imaging device for a cylindrical battery product capable of tilting a mirror, further comprising a camera lifting actuator for adjusting the height of the camera module.
In paragraph 1, An inner surface imaging device for a cylindrical battery product capable of tilting a mirror, further comprising: a coaxial illumination module disposed between the inner surface reflection mirror module and the camera module, and irradiating light in a direction coaxial with the shooting direction of the camera module.

Description

Imaging device for the internal surface of a cylindrical battery product with mirror tilting The present invention relates to an inner surface imaging device for a cylindrical battery product capable of tilting the mirror. Rechargeable batteries convert chemical energy into electrical energy to supply power externally, and when discharged, they can receive an external power supply to convert electrical energy back into chemical energy for storage. With the advancement of electronic devices, rechargeable batteries are being applied to various devices across diverse fields. These batteries are produced in various forms, and among these diverse types, the conventional cylindrical battery, which is the generally used form, remains widely used to this day. Cylindrical batteries with surface defects such as dents, scratches, or stains are classified as defective and discarded prior to final shipment to eliminate the risk of safety accidents caused by these defects. Therefore, battery manufacturers perform vision inspections on cylindrical batteries before final delivery to identify defective batteries in advance. As the power requirements of electronic devices have recently increased, cylindrical batteries are also trending toward larger sizes. Specifically, diameters have increased to approximately 46 mm, and batteries with lengths ranging from 80 mm to 130 mm have emerged. In surface inspection of these large cylindrical batteries, inspecting the inner surface presents greater difficulties compared to the outer surface. Specifically, conventionally, imaging of the inner surface of a cylindrical battery was performed by placing a camera directly above the battery at a certain distance and positioning a mirror that illuminates the inner surface in the camera's optical path, while moving the cylindrical battery relative to the camera. Consequently, as the length of the cylindrical battery increases, the installation height of the camera increases and the distance the battery moves up and down also increases, causing the size of the entire optical system to increase accordingly. In addition, as the length of the cylindrical battery product increases, the bottom part of the cylindrical battery product is positioned deeper, so the angle of the mirror must be nearly vertical to photograph the bottom part of the inner surface. This angle of the mirror narrows the field of view for inspecting defects in the bottom part of the inner surface, causing the defects to appear reduced in the detected image, and consequently acts as a factor that impedes the ability to detect defects. However, since the angle of the mirror must inevitably be maintained as described above to photograph the bottom part of the inner surface, conventional photography of the inner surface was performed by illuminating from the top to the bottom of the inner surface with a mirror tilted nearly vertically. FIG. 1 is a schematic diagram illustrating an inner surface imaging device for a cylindrical battery product capable of tilting a mirror according to one embodiment of the present invention. FIG. 2 is a conceptual diagram of a case in which a lifting module according to one embodiment of the present invention includes a camera lifting actuator, a lighting lifting actuator, and a mirror lifting actuator. FIG. 3 is a schematic diagram showing an inner surface reflective mirror module according to one embodiment of the present invention as viewed from above. FIG. 4 is a drawing for explaining the operation of a mirror angle adjuster according to one embodiment of the present invention. FIG. 5 is a drawing illustrating when one of the mirrors according to an embodiment of the present invention is at a first angle. FIG. 6 is a drawing showing the state in which the mirror illustrated in FIG. 5 is angle-shifted from a first angle to an angle close to a second angle. FIG. 7 is a drawing showing a state in which one mirror is switched to a first angle for a relatively long cylindrical battery product. FIG. 8 is a drawing showing a state in which one mirror is switched to a first angle for a relatively short cylindrical battery product. FIG. 9 is a drawing showing a state in which one mirror is turned to a first angle for a cylindrical battery product with a diameter larger than that of the cylindrical battery product shown in FIG. 7. FIG. 10 is a conceptual drawing illustrating an inner surface imaging device for a cylindrical battery product capable of tilting a mirror according to another embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is compl