KR102620467B1 - Multi-angle imaging device for container-shaped objects - Google Patents

Abstract

The present invention includes a transfer unit configured to transport the object to the inspection position, an inspection camera configured to acquire an image of the object placed at the inspection location and have an adjustable focal length, and an optical camera provided adjacent to the inspection location. It includes a first mirror block configured to change the path, and the object is configured as a container with an open upper side, and the mirror block provides an optical path so that the inspection camera can photograph the first mirror block and the inner surface of the object. It relates to a multi-angle imaging device for a container-type object, including a first mirror that switches and a second mirror that switches an optical path so that an inspection camera can photograph an exterior surface close to the first mirror block of the object.
The multi-angle photographing device for a container-type object according to the present invention can acquire images taken from various angles using a single camera, thereby achieving simplification of configuration. In addition, images of blind areas can be acquired through different mirrors, and images of symmetrical areas can be acquired simultaneously, which has the effect of increasing inspection efficiency.

Description

{Multi-angle imaging device for container-shaped objects}

The present invention relates to a multi-angle photographing device that can photograph a seated container-type object at various angles without adjusting its position.

In the process of producing a product, various inspection methods are used to determine whether a manufactured part or object is normal or defective. Among these, the vision inspection device is a process that acquires an image of an object and determines whether there are any apparent defects. Most real-life objects are composed of three-dimensional shapes, so in order to check defects, images are obtained by photographing the object at various angles.

Republic of Korea Patent No. 1514409 is disclosed in relation to a device for acquiring and inspecting such conventional images. However, in order to photograph an object from various angles, images are acquired by adjusting the relative position and direction between the camera and the object. However, during such relative movement, additional configuration and movement time are required for movement, which has the problem of reducing production efficiency.

Republic of Korea Patent No. 1514409

The purpose of the present invention is to provide a multi-angle imaging device capable of photographing a mounted object at various angles, which solves the problems of the conventional vision inspection device described above.

As a means of solving the above problem, a transfer unit configured to transport the object to the inspection position, an inspection camera configured to acquire an image of the object placed at the inspection location and have an adjustable focal length, and a device adjacent to the inspection location. It includes a mirror block configured to switch the optical path, and the object is composed of a container type with an open upper side, and the mirror block switches the optical path so that the inspection camera can photograph the mirror block and the inner surface of the object. A multi-angle imaging device for a container-type object may be provided, including a first mirror that switches the light path and a second mirror that allows the inspection camera to photograph the outer surface of the object that is close to the mirror block.

Meanwhile, the inspection camera is provided vertically above the inspection position and may be configured to acquire images reflected from the first mirror and images reflected from the second mirror, respectively, by adjusting the focal length.

Meanwhile, at least part of the outer surface of the object and some of the inner surface of the object may be blind spots when directly photographed by the inspection camera.

Meanwhile, the second mirror may be provided below the first mirror.

Additionally, the second mirror may be provided at a greater inclination angle than the first mirror.

Meanwhile, a plurality of mirror blocks may be provided and spaced apart at a predetermined angle around the inspection position.

Furthermore, there are four mirror blocks, and they can be arranged at 90-degree intervals on the horizontal while facing the inspection position.

Meanwhile, at least one of the four mirror blocks may have a different vertical position.

Additionally, the four mirror blocks may be arranged in different vertical positions from the adjacent mirror blocks.

Furthermore, the vertical positions of the four mirror blocks facing each other may be the same.

Meanwhile, among the four mirror blocks, the first mirror block pair facing each other is arranged at a higher lower position than the other pair, the second mirror block pair, and the transfer unit may be configured to transfer the object to the lower side of the first mirror block pair. there is.

Meanwhile, the inspection camera can be controlled to simultaneously acquire images of two areas of the object from the first mirrors provided in each pair of first mirror blocks.

Meanwhile, the inspection camera can be controlled to acquire images of two areas of the object simultaneously from the second mirrors provided in each pair of first mirror blocks by adjusting the focal length.

The multi-angle photographing device for a container-type object according to the present invention can acquire images taken from various angles using a single camera, thereby achieving simplification of configuration. In addition, images of blind areas can be acquired through different mirrors, and images of symmetrical areas can be acquired simultaneously, which has the effect of increasing inspection efficiency.

Figure 1 is a perspective view showing an example of a container-type object that is the subject of photography.
Figure 2 is a perspective view of a multi-angle photographing device for a container-type object according to an embodiment of the present invention.
Figure 3 is a cross-sectional view of a multi-angle photographing device for a container-type object according to an embodiment of the present invention.
Figure 4 is a partially exploded perspective view of the inspection camera of Figure 2.
Figure 5 is a cross-sectional view of the inspection camera.
Figure 6 is an exploded perspective view of the inspection camera.
Figure 7 is a cross-sectional view of the lighting module.
Figure 8 is a perspective view showing a mirror block and a transfer unit.
Figure 9 is a plan view showing the mirror block and the transfer unit.
Figure 10 is a cross-sectional view of the first mirror block pair.
Figure 11 is a cross-sectional view of the second mirror block pair.
Figure 12 is a diagram showing a state in which an object placed on the transfer unit is transferred to and placed in an inspection position.
Figure 13 is a diagram showing a first image acquired by an inspection camera.
FIG. 14 is a diagram illustrating a second image acquired by an inspection camera.
Figure 15 is a diagram showing a third image acquired by an inspection camera.
Figure 16 is a diagram showing a fourth image acquired by an inspection camera.
Figure 17 is a diagram showing a fifth image acquired by an inspection camera.
Figure 18 is a diagram showing a state in which an object for which image acquisition has been completed is taken out.

Hereinafter, a multi-angle photographing device for a container-type object according to an embodiment of the present invention will be described in detail with reference to the attached drawings. And in the description of the following embodiments, the names of each component may be referred to by different names in the art. However, if there is functional similarity and identity between them, they can be viewed as equivalent configurations even if modified embodiments are adopted. Additionally, symbols added to each component are described for convenience of explanation. However, the content shown in the drawings in which these symbols are written does not limit each component to the scope within the drawings. Likewise, even if an embodiment in which the configuration in the drawing is partially modified is adopted, if there is functional similarity and identity, it can be viewed as an equivalent configuration. Additionally, if it is recognized as a component that should naturally be included in light of the general level of technicians in the relevant technical field, the description thereof will be omitted.

First, the container-type object that is the subject of photography in the present invention will be described with reference to FIG. 1.

Figure 1 is a perspective view showing an example of a container-type object O that is the subject of photography. Referring to FIG. 1, the container-type object O that is the subject of photography in the present invention has an open top and may include a side wall. Here, for convenience of explanation, ‘container’ means a space formed inside that can accommodate any material or object (O), and is not limited to an actual ‘container’. In the container-type object O in the present invention, at least a part of the side wall may be configured to have an angle different from other parts.

Additionally, in the present invention, the container-type object O may have a shape in which at least some of its inner and outer surfaces are blind spots, making it impossible to obtain an image when photographed from vertically above.

Referring to FIG. 1(a), the container-type object O may be configured with a side wall whose width becomes narrower toward the bottom. In this case, it is necessary to obtain images of each side and perform an external inspection.

Referring to Figure 1(b), another form of the container-type object (O) in the present invention is shown, in which the outer wall is composed of a curved surface, and the side wall can be configured along a curved path where the diameter becomes smaller toward the upper and lower sides. there is. In this case, when shooting from vertically above the object O, at least part of the inner and outer surfaces of the side wall become blind spots.

The present invention is configured to obtain images of the container-shaped object O by shooting it from multiple angles without moving its position.

However, in the present invention, the ‘container-shaped object (O)’ is not limited to the form shown in FIG. 1, and may be an object (O) of various shapes including a side wall with an open upper side and an inner and outer surface. Additionally, the outer wall of the object O may be solid. In addition, the object O may be a container-shaped object O in which several members such as a mesh are gathered together to form an overall shape of a container, or a certain pattern may be formed.

Hereinafter, the multi-angle photographing device 1 for a container-type object, which is an embodiment of the present invention, will be described in detail with reference to FIGS. 2 to 18.

Figure 2 is a perspective view of a multi-angle photographing device 1 for a container-type object, which is an embodiment according to the present invention. In this drawing, for convenience of explanation, the mirror block is shown somewhat spaced apart from the inspection camera 400.

The multi-angle photographing device 1 for a container-type object, which is an embodiment according to the present invention, may be configured to include an inspection camera 400, a mirror block, and a transfer unit 200.

The inspection camera 400 is configured to acquire an image by radiating light to the object (O) transported to the inspection position (P). The inspection camera 400 is configured to irradiate light at various angles and can be configured to acquire images by adjusting the focal length. The inspection camera 400 may be arranged in a vertical direction and aligned so that an optical axis is formed in a downward direction. That is, the inspection camera 400 may be installed vertically above the inspection position (P).

The mirror block may be configured to include a reflective surface inclined upwardly adjacent to the inspection position (P). The mirror block may include a first mirror 311 and a second mirror 312 configured at different angles at the top and bottom. Each mirror switches the optical path so that the inspection camera 400, whose horizontal position is fixed, can photograph blind areas.

The mirror block is composed of a plurality of mirror blocks and switches the optical path so that the inspection camera 400 can acquire images in various directions. A plurality of mirror blocks may be configured around the inspection position (P). Preferably, four mirror blocks can be arranged adjacent to the inspection position (P) and at 90-degree intervals around the inspection position (P). Meanwhile, the bottom surface of a pair of facing mirror blocks may be arranged differently from the other pair of mirror blocks. That is, one pair of mirror blocks arranged in the four horizontal directions is placed vertically above the transfer unit 200, and a space is provided so that the object O can pass downward when it is transferred by the transfer unit 200. You can. Meanwhile, this mirror block will be described in detail later with reference to FIGS. 8 to 18.

The transfer unit 200 is configured to transfer the object O seated on the upper side. For example, the transfer unit 200 may include components for moving the object O horizontally, such as a conveyor belt. As described above, the transfer unit 200 may be arranged so that the transfer path can be determined through the lower side of a pair of mirror blocks that are positioned higher among the mirror blocks.

Meanwhile, the above-described inspection camera 400, mirror block, and transfer unit 200 may be placed on the base 100 (or stage) of the appearance inspection device for the object O, and is a commonly used appearance inspection device. It may be provided on a frame as follows.

Figure 3 is a cross-sectional view of a multi-angle imaging device for a container-type object O, which is an embodiment according to the present invention.

Referring to FIG. 3, the mirror block may be aligned and disposed at the center of the optical axis of each light in the lighting module. The light irradiated by the lighting module is radiated toward the inspection position (P) placed at the center of the mirror block, and in the state where the light is irradiated, the inspection camera 400 directly acquires an image of the object (O) or It may be configured to obtain a reflected image. At this time, the inspection camera 400 can determine the image to be acquired by adjusting the focal length. In other words, the image that can be clearly obtained varies depending on the focal length, and the inspection camera 400 has the focal distance adjusted multiple times and directly captures the image and object O that are acquired by being reflected in a plurality of mirrors to obtain the image. It can be obtained.

Hereinafter, the configuration and function of the inspection camera will be described in detail with reference to FIGS. 4 to 7.

Figure 4 is a partial exploded perspective view of the inspection camera of Figure 2, Figure 5 is a cross-sectional view of the inspection camera, Figure 6 is an exploded perspective view of the inspection camera, and Figure 7 is a cross-sectional view of the lighting module.

Referring to FIGS. 4 to 7 , the inspection camera 400 may be configured to acquire images of inspection positions spaced a predetermined distance apart on the optical axis. The inspection camera 400 acquires an image by irradiating light to an inspection location, and may be configured to acquire an image while changing the focal length.

The inspection camera 400 may include a lens module 410, an image sensor module 420, and a lighting module 430, and a case 401 surrounding the lens module 410 and the image sensor module 420. It may be configured to include.

The lens module 410 is configured to change the focal length when acquiring an image of a subject, that is, an object at an inspection position. The lens module 410 may be configured to include one or more lens kits. The lens is configured to change the focal length and, as an example, may be composed of a polymer lens. When a polymer lens is provided, the shape of the lens itself can be changed by external force to adjust the focal length. In this case, it may include a focal length adjuster (not shown) configured to change the shape by transmitting force to the polymer lens.

The image sensor module 420 may be configured to generate an electrical signal by photographing a subject. However, since this image sensor module 420 may have a widely used configuration, further detailed description will be omitted.

The lighting module 430 may be configured to irradiate various types of light to an object. Since objects are composed of various shapes and materials, there may be defects that cannot be identified by any type of lighting due to optical characteristics such as reflectance and shadow. Accordingly, the lighting module 430 can confirm the presence of defects in the appearance by irradiating various lights with optical differences such as the angle of the irradiated light and the amount of light, and improve the accuracy of the defects.

The lighting module 430 may be configured to include a plurality of light sources to irradiate various lights. As an example, the lighting module 430 may include a lighting frame 440, a coaxial lighting unit 431, a fiber lighting unit 433, a dome lighting unit 437, and an inclined lighting unit 438, 439. The lighting module 430 may be configured to be rotationally symmetrical overall about the optical axis. In addition, the plurality of lighting units provided in the lighting module 430 may be divided into a plurality of areas along the rotation direction and the operation of each may be independently determined. As an example, the area can be divided and controlled at 90-degree intervals along the rotation direction around the optical axis. Meanwhile, in some cases, lighting units provided in two areas spaced apart from each other by 180 degrees may be operated to emit light.

The lighting frame 440 serves as a foundation on which various lighting units, which will be described later, can be installed. The lighting frame 440 may have one side adjacent to the lens module 410 and the other side adjacent to the inspection position, and may be configured in the form of a cone whose radius becomes wider as it approaches the inspection location. The lighting frame 440 may have a hollow of a predetermined diameter formed at the center side to form an optical path. The lighting frame 440 may be configured to have a rotationally symmetrical shape with respect to the above-described optical axis.

Meanwhile, the inner surface of the lighting frame 440 may be provided with at least two cutting surfaces so that the lighting unit can be arranged at various angles. At least two cutting surfaces are configured to have different angles from the inspection position, and the lighting unit disposed on each cutting surface can irradiate light to the inspection position at different angles. Meanwhile, a dome-shaped reflective surface 441 may be provided on one side of the lighting frame. The dome-shaped reflective surface 441 is configured so that the light irradiated from the dome lighting unit 437, which will be described later, is reflected from the dome-shaped reflective surface 441 and then reaches the inspection position.

The coaxial illumination unit 431 is configured to irradiate light along the same optical axis as the image sensor module 420 to acquire an image. The coaxial lighting unit 431 may be provided on one side of the above-described lighting frame 440 and may be configured to irradiate light in a direction perpendicular to the above-described coaxis.

A beam splitter 432 may be provided at a point where the optical path of the coaxial lighting unit 431 and the optical axis of the lens module 410 meet. The beam splitter 432 may be configured to pass light from the inspection position to the lens module 410 and reflect the light emitted from the coaxial lighting unit 431 to be directed to the inspection position.

The fiber lighting unit 433 is provided with a light source 435 on one side so as to generate a greater amount of light than other lighting units, and has a plurality of optical fibers that penetrate the lighting frame 440 from the light source 435 and have one end exposed to the inside. It may be configured to include. A plurality of optical fibers 436 arranged along one circular path may form one bundle and be connected to the light source 435.

The fiber lighting unit 433 may include a first fiber lighting unit 433 and a second fiber lighting unit 434 having different diameters of circular paths at which ends are disposed. Here, the first fiber lighting unit 433 and the second fiber lighting unit 434 each refer to a portion of the optical fiber bundle exposed in a circular path on the lighting frame 440 side. The first fiber lighting unit 433 may be arranged along a circular path with a smaller diameter than the second fiber lighting unit 434.

The first fiber lighting unit 433 and the second fiber lighting unit 434 may each be connected to a light source 435 capable of generating a large amount of light. Referring to FIG. 5, as an example, two light sources 435 are provided on the left and right sides of the lens module 410, respectively, and the first fiber lighting unit 433 and the second light source 435 are provided through a plurality of optical fibers 436, respectively. Light can be transmitted to the fiber lighting unit 434. Therefore, light can be selectively irradiated along circular paths of different diameters. However, the arrangement and number of optical fibers 436 are only an example and may be modified and applied in various numbers and combinations.

The dome lighting unit 437 is configured to irradiate light to the dome-shaped reflective surface 441 described above, and may be arranged along a circular path. The light irradiation direction of the dome lighting unit 437 is irradiated while looking in the opposite direction from the inspection position, and the light is reflected on the dome-shaped reflective surface 441 and reaches the inspection location.

The inclined lighting unit is configured to irradiate light at an angle toward the inspection position. The oblique lighting unit may be configured to include a first oblique lighting unit 438 and a second oblique lighting unit 439 that irradiate light at different angles from the inspection position.

The first oblique lighting unit 438 may be configured to irradiate light at a greater angle to the inspection position than the second oblique lighting unit 439. The first inclined lighting unit 438 and the second inclined lighting unit 439 may be respectively provided on cutting surfaces having different inclinations on the lighting frame 440. The first oblique lighting unit 438 and the second oblique lighting unit 439 are each configured to form a circular path along the cutting surface, and may be configured to irradiate light while surrounding the inspection position. Meanwhile, a translucent plate 442 made of a semi-transparent material may be provided adjacent to the first inclined lighting unit so that the light emitted from the first inclined lighting unit 438 emits surface light.

The above-described coaxial lighting unit 431, dome lighting unit 437, first inclined lighting unit 438, and second inclined lighting unit 439 may be composed of LEDs. The dome lighting unit 437, the first inclined lighting unit 438, and the second inclined lighting unit 439 are composed of a plurality of LEDs and may each be provided on the lighting frame 440 along a rotationally symmetrical path.

Meanwhile, although not shown, the multi-angle photographing device for a container-type object may further include a control unit capable of controlling the inspection camera. The control unit may be configured to include a widely used processor, and may be equipped with software including an image processing algorithm that can determine whether the appearance is defective based on the acquired image.

Additionally, the lighting unit may be controlled to acquire an image while emitting light by selecting one or more of the coaxial lighting unit 431, the fiber lighting unit 433, the dome lighting unit 437, and the oblique lighting unit. As an example, one lighting unit may be selected, or a plurality of lighting units may be operated simultaneously to emit light and obtain an image at the same time.

Hereinafter, the mirror block will be described with reference to FIGS. 8 to 11.

FIG. 8 is a perspective view showing the mirror block and the transfer unit 200, and FIG. 9 is a plan view showing the mirror block and the transfer unit 200.

Referring to FIGS. 8 and 9 , the mirror block may include a pair of first mirror blocks 310 and a pair of second mirror blocks 320 that are symmetrical to each other.

Each mirror block may be provided with a first mirror 311 and a second mirror 312 having different inclinations for switching optical paths. The first mirrors 311 provided in the pair of first mirror blocks 310 may be configured at the same angle, and the second mirrors 312 may be configured at the same angle. However, in the pair of first mirror blocks 310, the first mirror 311 and the second mirror 312 are disposed facing each other, so their angles may be in opposite directions. Meanwhile, the second mirror block 320 pair may include a third mirror 321 and a fourth mirror 322. The third mirror 321 and the fourth mirror 322 may have different angles. Meanwhile, the first mirror 311, the second mirror 312, the third mirror 321, and the fourth mirror 322 may be configured to have at least one different angle with the horizontal plane.

The first pair of mirror blocks 310 are provided facing each other around the inspection position P, and the second pair of mirror blocks 320 are arranged on a plane in a direction perpendicular to the first pair of mirror blocks 310. You can. That is, four mirror blocks can be provided in four directions on a plane centered on the inspection position (P).

The lower end of the first pair of mirror blocks 310 may be installed at a higher position than the lower end of the second pair of mirror blocks 320. A transfer unit 200 is provided at an interval between the lower end of the first pair of mirror blocks 310 and the base 100, and the object O seated on the transfer unit 200 moves to the lower side of the first pair of mirror blocks 310. It can be configured to be possible. In this configuration, it is possible to perform an in-line type inspection even if a separate hand is not provided.

Figure 10 is a cross-sectional view of the first pair of mirror blocks 310.

Referring to FIG. 10, as described above, each mirror block of the first mirror block 310 pair may be provided with a first mirror 311 and a second mirror 312. The first mirror 311 is provided on the relatively upper side, and the second mirror 312 is provided on the relatively lower side. The first mirror 311 and the second mirror 312 may be provided with reflective surfaces connected in similar directions.

The first mirror 311 switches the optical path so that an area including the first mirror block 310 pair and the far inner surface of the object O disposed at the inspection position P can be imaged. The second mirror 312 is configured to image an area including an outer surface close to the first pair of mirror blocks 310 among the objects O disposed at the inspection position P.

The first mirror 311 is configured at a first angle (θ1) with the horizontal plane, and the second mirror 312 is configured with a second angle (θ2) with the horizontal plane. The second angle (θ2) is configured to be larger than the first angle (θ1). Accordingly, since the optical path is switched, the image that can be acquired by the inspection camera 400 becomes the inner surface of the object O and the outer surface of the object O corresponding to the blind area when looking at the object O. Meanwhile, even if part of the outer surface of the object O is cut and the circumference becomes smaller, the optical path is switched to the second mirror 312 to obtain an image as if shooting the side of the object O, thereby creating a blind area. It is possible to obtain images for . In addition, the first mirror 311 obtains the same image as when entering the inside of the object O and acquiring the image.

Figure 11 is a cross-sectional view of the second pair of mirror blocks 320.

Referring to FIG. 11, switching of the optical path by the second mirror block 320 pair can be performed similarly to the above-described first mirror block 310 pair. However, the third angle (θ3) formed by the third mirror 321 with the horizontal and the fourth angle (θ4) formed by the fourth mirror 322 with the horizontal are the above-mentioned first angle (θ1) and second angle (θ2). ) may be configured differently from each other. Since the installation positions of the first pair of mirror blocks 310 and the second mirror blocks 320 are different, the angles of the mirrors also change.

The third mirror 321 switches the optical path to acquire an image including the pair of second mirror blocks 320 and the inner surface of the distant object O, and the fourth mirror 322 converts the second mirror block 320 ) The optical path is switched to obtain an image including the outer surface close to the pair.

Hereinafter, the operating state of the multi-angle photographing device 1 for a container-type object according to the present invention will be described with reference to FIGS. 12 to 18.

Meanwhile, the capturing area I0 captured by the inspection camera 400 may be an area including all of a plurality of mirror blocks. In the drawings below, in the imaging area I0 of the inspection camera 400, both an image directly photographed of the object O and an image reflected by the first mirror block 310 and the second mirror block 320 are obtained. This may be possible, but this is roughly shown in Figure 12, and out-of-focus images are omitted in Figures 13 to 18.

FIG. 12 is a diagram illustrating a state in which the object O placed on the transfer unit 200 is transferred and placed at the inspection position P.

The object O is transferred to the inspection position P by a transfer unit 200, for example, a conveyor, and at this time enters the lower space of the first mirror block 310 pair.

FIG. 13 is a diagram illustrating a first image acquired by the inspection camera 400.

Referring to FIG. 13, the inspection camera 400 adjusts the focal length vertically above the object O placed at the inspection position P and directly acquires the first image I1.

FIG. 14 is a diagram illustrating a second image acquired by the inspection camera 400.

Referring to FIG. 14, the inspection camera 400 adjusts the focal length to obtain an image including the second image I2 reflected by the fourth mirror 322 of the second mirror block 320.

FIG. 15 is a diagram illustrating a third image acquired by the inspection camera 400.

Referring to FIG. 15, the inspection camera 400 adjusts the focal length to acquire an image including the third image I3 reflected by the third mirror 321 of the second mirror block 320.

FIG. 16 is a diagram illustrating a fourth image acquired by the inspection camera 400.

Referring to FIG. 16, the inspection camera 400 adjusts the focal length to obtain an image including the fourth image I4 reflected by the second mirror 312 of the first mirror block 310.

FIG. 17 is a diagram illustrating a fifth image acquired by the inspection camera 400.

Referring to FIG. 17, the inspection camera 400 adjusts the focal length to acquire an image including the fifth image I5 reflected by the first mirror 311 of the first mirror block 310.

In the above, the sequence shown in FIGS. 13 to 17 has been described as acquiring the first to fifth images in the order of the closest focal distance. That is, the inspection camera 400 acquires an image by adjusting the focal length from short to long. This change in focal length is done in the order of gradually increasing the focal length and taking pictures in order to change the five preset focal lengths efficiently in order to acquire an image. However, on the contrary, efficiency can be ensured by acquiring images while adjusting the focal length to a short focal length while the focal length is long. That is, the inspection camera 400 can take pictures while adjusting the focal length in the order of acquiring the first image from the fifth image.

Meanwhile, although not shown, the control unit may perform an appearance inspection by extracting the first to fifth images I1 from each image acquired in FIGS. 12 to 17 above.

Figure 18 is a diagram showing a state in which an object O for which image acquisition has been completed is taken out.

Referring to FIG. 18, the object O that has been photographed is transported to the lower side of the first mirror block 310 by the operation of the transfer unit 200, completing one appearance inspection cycle, and then the next object O ) is transferred to the inspection position (P) by the transfer unit 200, and the first image (I1) to the fifth image (I5) can be acquired again.

The multi-angle photographing device for a container-type object according to the present invention can acquire images taken from various angles using a single camera, thereby achieving simplification of configuration. In addition, images of blind areas can be acquired through different mirrors, and images of symmetrical areas can be acquired simultaneously, which has the effect of increasing inspection efficiency.

P: Inspection position
I0: Shooting area
I1:First image I2;Second image
I3:3rd image I4:4th image
I5:Fifth image
O: object
1: Multi-angle imaging device for container-type objects
100: Base 200: Transfer unit
310: first mirror block
311: first mirror θ1: first angle
312: second mirror θ1: second angle
320: second mirror block
321: Third mirror θ3: Third angle
322: fourth mirror θ4: fourth angle
400: inspection camera
410: Lens module
420: Image sensor module
430: Lighting module
433: Fiber lighting unit

Claims (13)

A transfer unit configured to transfer an object to an inspection location;
an inspection camera configured to acquire an image of an object placed at the inspection location and have an adjustable focal length; and
It is provided adjacent to the inspection position and includes four mirror blocks configured to switch optical paths,
The object is composed of a container type with an open top,
Each mirror block is:
a first mirror that switches an optical path so that the inspection camera can photograph an inner surface of the object that is far from the mirror block; and
It includes a second mirror that switches the optical path so that the inspection camera can photograph an external surface of the object that is close to the mirror block,
The inspection camera is,
It is provided vertically above the inspection position,
Adjusting the focal length to obtain an image of the object reflected from the first mirror, an image of the object reflected from the second mirror, and an image taken directly from above the object,
Among the four mirror blocks, the first pair of mirror blocks facing each other is positioned higher at the bottom than the other pair of second mirror blocks,
The transfer unit is configured to transfer the object to the lower side of the first mirror block pair. delete According to claim 1,
A multi-angle imaging device for a container-type object in which at least a portion of an outer surface of the object and a portion of an inner surface of the object are blind spots when directly photographed by the inspection camera. According to clause 3,
The second mirror is a multi-angle photographing device for a container-type object, wherein the second mirror is provided below the first mirror. According to clause 4,
The second mirror is provided at a greater angle than the first mirror. According to clause 5,
The mirror blocks are provided in plural,
A multi-angle imaging device for a container-type object that is provided at a predetermined angle around the inspection position. According to clause 6,
A multi-angle imaging device for container-type objects positioned at 90-degree intervals on the horizontal while looking at the inspection position. delete delete delete delete According to clause 7,
The inspection camera is,
A multi-angle imaging device for a container-type object controlled to simultaneously acquire images of two areas of the object from the first mirrors provided in each pair of first mirror blocks. According to claim 12,
The inspection camera is,
A multi-angle photographing device for a container-type object controlled to obtain images of two areas of the object simultaneously from the second mirrors provided in each pair of first mirror blocks by adjusting the focal distance.

Images