KR102000906B1 - Appearance vision inspection system for ferrite part - Google Patents

Abstract

The present invention relates to a system for inspecting exterior vision of ferrite, comprising: a first exterior inspecting unit (100) loading ferrite and generating photographing data on a left region (Z1) and a right region (Z2); a second exterior inspecting unit (200) receiving the ferrite from one side of the first exterior inspecting unit (100) and generating photographing data on an upper center region (Z3), an upper left region (Z4), and an upper right region (Z5); a third exterior inspecting unit (300) receiving the ferrite from one side of the second exterior inspecting unit (200) and generating photographing data on a lower left region (Z6), a lower right region (Z7), and a lower center region (Z8); a control unit (400) receiving the photographing data on the regions and detecting defects by machine vision image processing; and a sorting unit (500) receiving the ferrite from one side of the third exterior inspecting unit (300) and selectively discharging the ferrite in association with the control unit (400). Thus, defects such as fine cracks can be accurately and efficiently detected in the production of the ferrite.

Description

APPARANCE VISION INSPECTION SYSTEM FOR FERRITE PART

The present invention relates to a ferrite external vision inspection system, and more particularly, to a ferrite external vision inspection system for ferrite (hereinafter referred to as " ferrite ") which uses machine vision to accurately and quickly detect flaws, And an appearance inspection system.

Ferrite, which is an oxide-based magnetic material obtained by mixing and sintering iron oxide with manganese, nickel, and zinc, is used in various industrial fields. For example, a component that requires a heat resistance characteristic, such as an automobile exhaust system passage, is mainly composed of a ferrite-based alloy excellent in heat resistance and oxidation resistance characteristics in a temperature range of hundreds of degrees Celsius. In addition, components made of a ferrite magnetic material are mounted on various electronic products requiring magnetic properties.

On the other hand, since ferrite is formed by using an alloy material made of an iron oxide compound, a large amount of various impurities remain even though the refining process is performed. Therefore, ferrite has problems such as cracking or micro-cracking in the manufacturing process or damage or deformation of the outer appearance during processing such as rolling.

When the ferrite is attached to a device in a state where defects such as cracks are generated, it may cause deterioration of the performance and lifetime of the device. Therefore, when the ferrite is manufactured, the process of inspecting the appearance is performed to select good products and defective products Work is being done.

In general, a method for inspecting the appearance of a ferrite is generally a method in which a test stand is provided on one side of a conveyor for conveying ferrite and a worker directly observes the appearance of the part with the naked eye. Recently, the ferrite being transferred is photographed with a camera, A technique for detecting an abnormality is applied to an inspection method in which an operator confirms an image.

As an example of a known technique, Korean Patent Laid-Open No. 10-1997-0058518 discloses a method of visually inspecting the appearance of a semi-cylindrical ferrite core, comprising a main controller for checking the appearance of the ferrite core to judge a positive / A frame / grabber section for modifying the inspection position of the ferrite core; and a frame / grabber section for detecting the position of the ferrite core in the infrared sensor, And a camera for capturing an image of the ferrite core at a plurality of positions.

As another example, Korean Patent Registration No. 10-0188400 discloses a ferrite core comprising a core conveying portion provided at one side of a conveyor belt to which a ferrite core is fed and installed so as to sandwich and convey ferrite cores, a camera fixing plate And a CCD camera supported and fixed to the upper center of the camera fixing plate on the upper side of the core holding plate, and a ferrite core And constitutes a testing apparatus including a core inspecting section installed for carrying out the work.

Korean Patent Laid-Open No. 10- 1997-0058518 (July 31, 1997) Korean Patent No. 10 - 0158400 (December 15, 1998) Korean Patent Publication No. 10-1994-0048527 (July 29, 1997) Korean Patent Publication No. 10- 1997- 0058491 (July 31, 1997)

Conventionally, it is a common practice for a worker to conduct inspection in such a manner as to visually check the appearance of the product when the ferrite is manufactured. However, such a method has a disadvantage in that not only the reliability is low, but also productivity and efficiency are low due to the generation of labor costs and the delay of the process time because the inspection quality is different according to the skill level of the operator or the judgment standard.

Due to such a problem, recently, a ferrite being conveyed is photographed with a digital camera and an inspection method in which an operator confirms an image through a monitor screen is applied. However, the inspection method using a general digital camera has a limitation in that it is possible to detect defects only at a recognizable level from a photographed image.

On the other hand, there is an example in which a 2D line scan camera or a 3D line scan camera is applied to a conventional ferrite inspection instead of a general digital camera. However, since the 2D line scan camera is a type in which photographing is performed while linearly moving the inspected object or the camera, it is very difficult to distinguish defects due to the dark color and surface texture inherent to ferrite, particularly to noise. Therefore, in the case of micro cracks, there is a disadvantage that not only the detection rate is small but also the detection efficiency by the software image processing is low, so that the hardware such as the shutter speed and the FPS requires high quality. In addition, 3D cameras are expensive because of the high cost of the equipment itself, and it takes about 10 to 20 seconds for each unit of the inspected object, and the amount of captured data is so large that the processing time is also long. There is a disadvantage in that the efficiency is considerably low for application to the field.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art,

A first visual inspection unit (100) for loading the ferrite and generating photographic data of the left area (Z1) and the right area (Z2)

A second visual inspection unit 200 which receives the ferrite from one side of the first visual inspection unit 100 and generates photographic data of the upper central region Z3, the upper left region Z4 and the upper right region Z5, and,

A third visual inspection unit 300 for receiving ferrite from one side of the second visual inspection unit 200 and generating photographic data of a lower left region Z6, a lower right region Z7 and a lower central region Z8, and,

A control unit (400) for receiving photographic data for the areas and detecting defects by machine vision image processing,

And a screening unit (500) for transferring the ferrite from one side of the third external inspection unit (300) and intermittently discharging the ferrite by interlocking with the control unit (400), thereby forming a ferrite external vision inspection system It is possible to achieve the object of accurately and efficiently detecting defects such as micro-cracks.

The present invention provides an appearance inspection system using machine vision in order to efficiently detect defects such as micro-cracks that occur during the manufacture and processing of ferrite.

Accordingly, there is an advantage that the productivity and efficiency can be remarkably increased as compared with the conventional inspection of the appearance of the ferrite by relying on the naked eye of the operator.

In addition, the present invention can be configured to apply a 2D area scan camera to acquire high resolution image capturing data within 3 seconds while constructing a system at a lower cost than a conventional 2D line scan camera or 3D line scan camera, Machine vision deep learning technology is applied to improve discrimination power and improve inspection accuracy and reliability.

In addition, since the present invention can differentiate the position and inspection standard of the system according to different specifications and shapes according to the type of ferrite, which is the object to be inspected, more precisely, It is possible to achieve various effects such as enabling unmanned operation of the overall ferrite inspection work, and the like.

1 is a schematic block diagram of a ferrite external vision inspection system according to the present invention;
2 is a perspective view of a ferrite external vision inspection system according to the present invention.
3 is a plan view of a ferrite exterior vision inspection system according to the present invention.
4 is a perspective view of a first appearance inspection unit of a ferrite appearance vision inspection system according to the present invention.
Figure 5 is a side view of Figure 4;
6 is a perspective view of a second external inspection unit of the ferrite external vision inspection system according to the present invention.
Figure 7 is a side view of Figure 6;
8 is a perspective view of a third external inspection unit of the ferrite external vision inspection system according to the present invention.
Fig. 9 is a side view of Fig. 8; Fig.
10 is a perspective view of a screening unit of a ferrite external vision inspection system according to the present invention.
11 is an exploded view of a photographing part and a lighting part of a ferrite external vision inspection system according to the present invention.
12 to 14 are diagrams illustrating an operating state of a ferrite external vision inspection system according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and an operation of a ferrite outer appearance vision inspection system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of parts that can be easily implemented by those skilled in the art may be omitted.

FIG. 1 is a schematic block diagram of a ferrite external vision inspection system according to the present invention, FIG. 2 is a perspective view of a ferrite external vision inspection system according to the present invention, FIG. 3 is a plan view of a ferrite external vision inspection system according to the present invention, Fig. 5 is a side view of Fig. 4, Fig. 6 is a perspective view of the second external inspection unit of the ferrite external vision inspection system according to the present invention, Fig. 7 is a perspective view of the second external inspection unit of the ferrite external vision inspection system according to the present invention, 9 is a side view of FIG. 8, and FIG. 10 is a sectional view of a ferrite external vision inspection system according to the present invention. FIG. 8 is a side view of FIG. 6, FIG. 8 is a perspective view of a third external inspection unit of a ferrite external vision inspection system according to the present invention, Fig. 11 is an exploded view of a photographing part and an illuminating part of a ferrite external vision inspection system according to the present invention, and Figs. 12 to 14 are views showing a ferrite external vision inspection system Fig. 2 shows an operating state example of the system.

The ferrite external vision inspection system to which the technology of the present invention is applied is related to a visual inspection system using a machine vision, which is capable of more accurately detecting defects such as micro-cracks, which are hard to be visually recognized during manufacturing of a ferrite component I know.

For this purpose, the ferrite external vision inspection system of the present invention is constructed so that ferrite taken out in a state in which impurities are removed through the latter half of the ferrite manufacturing system, for example, a finishing unit and a cleaning unit, is loaded and inspected for micro cracks, cracks and foreign matter .

Specifically, the ferrite external vision inspection system according to the present invention includes an outer appearance of a three-dimensional ferrite having a curved surface in a left region Z1, a right region Z2, an upper central region Z3, an upper left region Z4, As shown in Figs. 1 to 3, in order to inspect each region by dividing into an upper right region Z5, a lower left region Z6, a lower right region Z7, and a lower central region Z8, Unit 100, a second visual inspection unit 200, a third visual inspection unit 300, and a control unit 400 and a screening unit 500. [

4 to 5, the first visual inspection unit 100 is configured to load ferrite and generate photographic data of the left area Z1 and the right area Z2, and the first visual inspection module 100 110, a left side inspection module 120, and a right side inspection module 130.

The first feed module 110 is configured to feed and transport ferrite in a row and includes a first left holder 111 and a first right holder 112 and a first left and a second left and right elevator bars 113 and 114 And a plurality of first transport handles 115. [

The first left cradle 111 and the first right cradle 112 are installed in two rows parallel to the feeding direction of the ferrite. According to the present invention, the ferrite is divided into a first left holder 111 and a first right holder 112 to be loaded on the left and right bottom faces of the ferrite, As shown in FIG.

The first left pedestal 113 and the first right pedestal 114 are disposed between the first left illuminating unit 121 and the first right illuminating unit 131 to be described later and the first left holding table 111 and the first right holding table 114. [ (112). A predetermined vertical cylinder linked to the same movable range is mounted on one side of each of the first left-hand platform 113 and the first right-hand platform 114. The height of the ferrite can be adjusted by raising and lowering the platform positioned at the same height as that of the ferrite, so that the ferrite is positioned at the center of the first left illumination part 121 and the first right illumination part 131 at the time of photographing Respectively.

The first feed handle 115 is provided with a plurality of ferrules to feed the ferrules in units of the upper side of the first left holder 111 and the first right holder 112. A predetermined transverse moving means for transversely moving in parallel with the first left receiving table 111 and the first right receiving table 112 and a driven means for adjusting the height of the first conveying handle 115 are provided on one side of the first conveying handle 115 Respectively. In the present invention, a plurality of first transport handles 115 are provided on the front and rear sides starting from the first left platform 113 and the first right platform 114, and ferrites loaded on the platform are arranged on the upper side of the platform And on the rear side, operations for feeding from the platform to the second visual inspection unit 200 are simultaneously performed.

On the other hand, a first adjusting unit 116 is mounted on one side of the first conveying module 110. As described above, ferrites are different in size according to their types. Therefore, the ferrite loaded on the first visual inspection unit 100 is positioned on the left side of the first left cradle 111, the left side of the first left cradle 113, The distance between the whole of the inspection module 120 and the entirety of the right side inspection module 130 of the first right platform 112 and the first right platform 114 located on the right side is adjusted through the first adjustment means 116 do.

The left side inspection module 120 includes a first left positioning part 123 for horizontally aligning and mounting the first left illumination part 121 and the first left imaging part 122 from the left side of the first transfer module 110, Respectively.

The first left illuminating unit 121 has a dome shape that forms a center hole at a rear vertex and is positioned to face the center of the first left elevator base 113 from one side of the first left sink base 111. A plurality of lights are mounted inside the dome shape, and light is reflected through the inner peripheral surface to irradiate light to the left region Z1 of the ferrite.

The first left-side photographing unit 122 photographs the left region Z1 of the ferrite located on the front platform of the illuminating unit through the center hole by locating the lens so as to face the center hole from the rear of the first left illuminating unit 121 Respectively.

The first left positioning part 123 is formed with a predetermined bracket for mounting the first left illumination part 121 and the first left imaging part 122 so that the center part is aligned on the coaxial line, (111).

The right side inspection module 130 aligns the first right illumination part 131 and the first right side imaging part 132 horizontally so as to face the left side inspection module 120 from the right side of the first conveyance module 110 And a first right-side position portion 133 for receiving the first right-

The first right lighting part 131 is provided in a dome shape forming a center hole at a rear vertex and is positioned from one side of the first right side cradle 112 to the center of the first right side cradle 114. A plurality of lights are mounted inside the dome shape, and light is reflected through the inner peripheral surface to irradiate light to the right area Z2 of the ferrite.

The first right side photographing part 132 is disposed to face the center hole from the rear of the first right side lighting part 131 and photographs the right side area Z2 of the ferrite located on the front platform of the illuminating part through the center hole Respectively.

The first right side position part 133 is formed with a predetermined bracket for mounting the first right side illumination part 131 and the first right side photographing part 132 so that the center part is aligned on the coaxial line, (112).

6 to 7, the second external inspection unit 200 receives ferrite from one side of the first external inspection unit 100 and receives the upper central region Z3 and the upper left region Z4 And an upper left side inspection module 230 and an upper right side inspection module 240. The upper right side inspection module 230 and the upper right side inspection module 240 are configured to generate photographed data of the upper right region Z2 and the upper right region Z5, ).

The second conveying module 210 is configured to convey ferrite passing through the first external inspection unit 100 in a line and transfer the same to the second conveying module 210. The second conveying module 210 includes a second left cradle 211 and a second right cradle 212, A second right platform 213, a second right platform 214, and a second feed handle 215.

The second left cradle 211 and the second right cradle 212 are installed in two rows parallel to the feeding direction of the ferrite. In the present invention, in order to improve the efficiency of the space and the copper line, the second left cradle 211 and the second left cradle 211 are fixed to one side orthogonal to the rear ends of the first left cradle 111 and the first right cradle 112, 2 right stand 212 is installed. As described above, ferrites are different in size according to their types. Therefore, in the second visual inspection unit 200, like the first visual inspection unit 100, the second left restraint 211 and the second right restraint 212, So that the distance between the cradles can be adjusted as required.

The second left pedestal 213 and the second right pedestal 214 are disposed on the lower side between the second left illumination part 231 and the second right illumination part 241 to be described later, And is mounted on the platform 212. A predetermined vertical cylinder linked to the same movable range is mounted on one side of each of the second left platform part 213 and the second right platform part 214. It is desirable that the height of the second left platform and the second platform are adjusted in cooperation with the fourth adjustment means 234 and the fifth adjustment means 244 to be described later. The height of the ferrite can be adjusted by raising and lowering the platform positioned at the same height as the platform so that the ferrite is positioned at the center of the second left illumination section 231 and the second right illumination section 241 Respectively.

The second feed handle 215 is adapted to feed ferrite units one by one from the second left holder 211 and the second right holder 212. The second feed handle 215 is provided at one side thereof with predetermined transversely moving means parallel to the second left holder 211 and the second right holder 212 to move the ferrite loaded in the holder to the upper central inspection module 220, And the upper side of the platform are continuously connected to each other.

On the other hand, a second adjusting means 216 is mounted on one side of the second conveying module 210. As described above, since ferrites differ in size according to their types, the second left cradle 211 and the second left cradle 213 located on the left side with respect to the ferrite loaded in the second exterior inspection unit 200 And the distance between the second right-side platform 212 and the second right-side platform 214 located on the right side.

The upper central inspection module 220 includes a second central positional portion 223 vertically aligning and mounting the second central illumination portion 221 and the second central photographing portion 222 on the upper side of the second transfer module 210 Respectively.

The second central illuminating unit 221 is provided in a dome shape forming a center hole at a rear vertex and is positioned to face the center between the second left mount table 211 and the second right mount table 212. A plurality of lights are mounted inside the dome shape and the light is reflected through the inner peripheral surface to irradiate light to the upper central region Z3 of the ferrite.

The second central photographing unit 222 photographs the upper central region Z3 of the ferrite located at the vertically lower side of the illuminating unit through the center hole by locating the lens so as to face the center hole from the rear of the second central illuminating unit 221 Respectively.

The second center portion 223 is formed with a predetermined bracket for mounting the second central illuminating portion 221 and the second central photographing portion 222 so that the center portion of the second central illuminating portion 223 is aligned with the second left illuminating portion 211 or on a predetermined vertical frame standing upright on one side of the second right-side stand 212.

The upper left inspection module 230 includes a second left positioning part 231 for aligning and mounting the second left illumination part 231 and the second left imaging part 232 in the oblique direction from the upper left side of the second transfer module 210 233).

The second left illumination part 231 is provided in a dome shape forming a center hole at a rear vertex and is positioned to face the center of the second left platform 213 from one side of the second left cradle 211. A plurality of lights are mounted inside the dome shape, and light is reflected through the inner peripheral surface to irradiate light to the upper left region Z4 of the ferrite.

The second left photographing part 232 photographs the upper left area Z4 of the ferrite located in the oblique direction of the illuminating part through the center hole by locating the lens so as to face the center hole from the rear of the second left illuminating part 231 Respectively.

The second left side position part 233 is formed with a predetermined bracket for mounting the second left side illumination part 231 and the second left side photographing part 232 so that the center part is aligned on the coaxial line, And fixed in a diagonal direction on a predetermined vertical frame standing on one side of the frame 211.

The upper right inspection module 240 detects the second right illumination part 241 and the second right imaging part 242 in an oblique direction so as to be symmetrical to the upper left inspection module 230 from the upper right side of the second transfer module 210 And a second right side portion 243 for aligning and mounting.

The second right lighting part 241 is provided in a dome shape forming a center hole at a rear vertex and is positioned from one side of the second right side rest room 212 toward the center of the second right side elevation base 214. A plurality of lights are mounted inside the dome shape, and light is reflected through the inner peripheral surface to irradiate light to the upper right area Z5 of the ferrite.

The second right side photographing part 242 photographs the upper right area Z5 of the ferrite located in the oblique direction of the illumination part through the center hole by positioning the lens so as to face the center hole from the rear of the second right illumination part 241 Respectively.

The second right side position part 243 is formed with a predetermined bracket for mounting the second right side illumination part 241 and the second right side photographing part 242 and is arranged so that the center part is aligned on the coaxial line, Is fixed in a diagonal direction on a predetermined vertical frame standing upright on one side of the frame (212).

Third adjusting means to fifth adjusting means 224, 234 and 244 are mounted on the second center-position portion 223, the second left-side position portion 233 and the second right-side position portion 243, respectively, Accordingly, the upper central inspection module 220, the upper left inspection module 230 and the upper right inspection module 240 interlock with the second adjustment means 216 and the third to fifth adjustment means 224, 234, And adjust the distance in the diagonal direction between the second conveying modules 210.

8 to 9, the third external inspection unit 300 receives ferrite from one side of the second external inspection unit 200 and receives the lower left region Z6 and the lower right region Z7 A lower right inspection module 330, a lower central inspection module 340, and a lower central inspection module 340. The third transfer module 310, the lower left inspection module 320, the lower right inspection module 330, ).

The third conveying module 310 includes a third conveying handle 311 and a third receiving part 312 for picking up and transporting the ferrite passing through the second external inspection unit 200 by one unit.

The third transport handle 311 has a plurality of ferrite units for picking up one unit at a time. A predetermined transverse moving means for transversely moving between the second visual inspection unit 200 and the sorting unit 500 to be described later is provided at one side of the third transport handle 311, 3 conveying handles 311. In this embodiment,

The third holder 312 is provided to temporarily load ferrite between the third transfer handles 311. In the present invention, a plurality of third transport handles 311 are provided on the front and rear sides of the third loading table 312, and the second left loading table 211 and the second right loading table 313 of the second visual inspection unit 200, The ferrite is picked up from the cradle 212 and fed to be positioned on the upper side between the lower left inspection module 320 and the lower right inspection module 330 and temporarily loaded on the third cradle 312, The operation for feeding from the holder 312 to the sorting unit 500 is performed simultaneously.

The lower left inspection module 320 includes a third left positioning part 321 for aligning and mounting the third left illumination part 321 and the third left imaging part 322 in the oblique direction from the lower left side of the third transfer module 310 323).

The third left illumination unit 321 is provided in a dome shape that forms a center hole at a rear vertex and is positioned to face the center of the third transport handle 311 from one side of the third transport module 310. A plurality of lights are mounted on the inside of the dome, and light is reflected through the inner peripheral surface to irradiate light to the lower left area Z6 of the ferrite.

The third left side photographing part 322 photographs the lower left area Z6 of the ferrite located in the oblique direction of the illuminating part through the center hole by positioning the lens so as to face the center hole from the rear of the third left illuminating part 321 Respectively.

The third left positioning part 323 is formed with a predetermined bracket for mounting the third left illumination part 321 and the third left imaging part 322. The third left positioning part 323 is aligned with the center part on a coaxial line, In the oblique direction on one base side of the base plate 310.

The lower right side inspection module 330 detects the third right side illumination part 331 and the third right side imaging part 332 in the diagonal direction so as to be symmetrical to the lower left side inspection module 320 from the lower right side of the third conveyance module 310 And a third right side portion 333 for aligning and mounting.

The third right illumination unit 331 is provided in a dome shape that forms a center hole at a rear vertex and is positioned to face the center of the third transport handle 311 from one side of the third transport module 310. A plurality of lights are mounted inside the dome shape, and light is reflected through the inner peripheral surface to irradiate light to the lower right area Z7 of the ferrite.

The third right side photographing part 332 photographs the lower right area Z7 of the ferrite located in the diagonal direction of the illumination part through the center hole by positioning the lens so as to face the center hole from the rear of the third right illumination part 331 Respectively.

The third right side position part 333 is formed with a predetermined bracket for mounting the third right side illumination part 331 and the third right side photographing part 332, In the oblique direction on one base side of the base plate 310.

The lower central inspection module 340 includes a third central positional portion 343 vertically aligning and mounting the third central illuminating portion 341 and the third central photographing portion 342 from below the third transfer module 310 Respectively.

The third central illumination unit 341 has a dome shape that forms a center hole at a rear vertex and is positioned toward the center of the third transport handle 311. A plurality of lights are mounted inside the dome shape and the light is reflected through the inner peripheral surface to irradiate light to the lower central region Z8 of the ferrite.

The third central photographing unit 342 is disposed to face the center hole from the rear of the third central illuminating unit 341 and photographs the lower central region Z8 of the ferrite located vertically above the illuminating unit through the center hole Respectively.

The third central position 343 is formed with a predetermined bracket for mounting the third central illuminating unit 341 and the third central photographing unit 342 so that the central portion of the third central illuminating unit 343 is aligned with the third transporting module 310).

The sixth to eighth adjustment means 324, 334 and 344 are mounted on the third center portion 343, the third left position portion 323 and the third right position portion 333, respectively, Therefore, the distance between the lower central inspection module 340, the lower left inspection module 320 and the lower right inspection module 330 is adjusted.

The plurality of photographing units mounted on the first to third visual inspection units 100 to 300 to photograph the regions of the ferrite are area scan cameras having a resolution of 20 M pixels or more and a frame rate per second of 6 fps or more .

In the present invention, the first and second visual inspection units 100 to 300 include first and second left and right photographing units 122 and 132, a second center, left and right photographing units 222, 232 and 242, And eight photographing portions including the central photographing portions 322, 332, and 342. [ The photographing unit comprises an ultra-high-definition vision camera and a lens for mounting a CMOS image sensor, and is configured to generate photographic data at a level at which cracks having a size of 50 to 100 mu m can be identified.

The illuminating unit mounted on the first to third external inspection units 100 to 300 and irradiating light toward the regions of the ferrite is located within a range of 40 to 80 mm, (FOV) of three times the area of the observer's eye.

In the present invention, the first and second visual inspection units 100 to 300 include first and second left and right illumination units 121 and 131, a second center, left and right illumination units 221 and 231 and 241, (321, 331, 341). The illumination unit is dome-shaped, and collects and reflects light. In particular, the illumination unit includes a spotlight having a luminance of 50 to 150 cd / m 2 and a wavelength of 470 nm or less. This is to make the ferrite texture and fine cracks more easily distinguishable, while significantly reducing the reflectivity of the light source compared to a light source having a long wavelength region.

The control unit 400 controls each of the areas of the ferrite generated by the first to third external inspection units 100 to 300, that is, the left area Z1, the right area Z2, The upper right region Z5, the lower left region Z6, the lower right region Z7 and the lower central region Z8 is received and processed in the machine vision image processing And includes a processing module 410 and a control module 420 so as to detect defects.

The processing module 410 receives photographic data from the first to third visual inspection units 100 to 300, processes the image, and calculates read data. The processing module 410 comprises a computer program stored in the medium.

The processing module 410 processes the photographed data by software to emphasize the difference in light and darkness, removes unnecessary after-images, and then calculates the area of the blob area through binarization to detect micro-cracks. In addition, The image processing process for detecting the accuracy of the machining dimension is performed by calculating a boundary line by applying a differential function to two points having the largest inclination depending on the position.

Particularly, in the present invention, the machine vision deep learning technique is applied to the processing module 410 so that the analysis ability is improved in real time by learning the read data. That is, in the process of reading and processing the acquired image data, the read data for the micro cracks formed in various aspects are learned and the discrimination power is significantly increased.

The control module 420 is provided to operate the sorting unit 500 in accordance with the read data in cooperation with the processing module 410. The control module 420 includes a computer readable medium having recorded thereon a program or a computer itself, and the first to third visual inspection units 100 to 300 and a screening unit 500, which will be described later, Data transmission and reception are performed.

10, the sorting unit 500 is configured to transfer ferrite from one side of the third external inspection unit 300 and to selectively discharge ferrite in conjunction with the control unit 400, The first sorting handle 540, and the second sorting handle 550. The first sorting handle 540 and the second sorting handle 550 are provided with a first sorting handle 510 and a second sorting handle 550, respectively.

The first discharge unit to the third discharge unit 510 to 530 are installed so as to form different paths around the lower side of one side of the third transfer module 310 to unload the good, defective, and reserved ferrite, respectively Respectively. At the rear end of the first to third discharge bands 510 to 530, predetermined loading means is provided to collect the selected ferrite.

The first sorting handle 540 is horizontally provided at the center of the first to third discharge stands 510 to 530 and is hinged to the first discharge stand 510 in cooperation with the control module 420 do. That is, the first sorting handle 540 is provided in the vertical upright position within the movable range of the third feed handle 311 of the third visual inspection unit 300 to receive the ferrite.

A predetermined cylinder is mounted on a lower portion of one side of the first sorting handle 540 to operate downward toward the first discharge stand 510 starting from the hinge shaft. Therefore, it is preferable that the first discharge unit 510 is provided in the form of a chute having a predetermined inclination at the lower side of the hinge operation side of the first sorting handle 540.

The second sorting handle 550 is provided at an upper portion of one side of the first sorting handle 540 and is interlocked with the control module 420 so as to be traversed toward the second discharge stand 520. In other words, the second sorting handle 550 is arranged so that the ferrite held on the upper side of the first sorting handle 540 in the state in which the first sorting handle 540 is kept horizontal by the control module 420, (Not shown).

The operation state of the ferrite external vision inspection system to which the technology of the present invention having the above-described structure is applied will be described below. It is to be understood that the present invention is not limited to the following embodiments, and various modifications may be made without departing from the scope of the present invention. .

The ferrite external vision inspection system of the present invention is usually constructed in the latter part of a ferrite manufacturing system including a firing unit and a cleaning unit to perform inspection by supplying ferrite. In this embodiment, a series of operating states for detecting defects that can not be visually recognized, such as micro-cracks, are applied to a ferrite core manufacturing system widely used for automotive parts.

The ferrite external vision inspection system of the present invention includes a first external appearance inspecting unit 100 for loading ferrite, a second external appearance inspecting unit 200, a third external appearance inspecting unit 300, and a sorting unit 500 And a control unit 400 is mounted on one side to control the overall system.

The processing module 410 of the control unit 400 preliminarily inputs data on the selection criteria of the ferrite as the inspected object to generate setting data, and further, through the control module 420, The left side inspection module 120, the right side inspection module 130, and the upper central inspection module 130, which are controlled by the first to eighth adjustment means 116, 216, 224, 234, 244, 324, 334, 344 mounted on the inspection units 100 to 300, The upper right inspection module 240, the lower central inspection module 340, the lower left inspection module 320 and the lower right inspection module 330 are set in the module 220, the upper left inspection module 230, the upper right inspection module 240,

The ferrite is loaded on the first conveying module 110 of the first visual inspection unit 100 through the conveyor. The left and right bottom surfaces of the ferrite are mounted on the first left mounting base 111 and the first right mounting base 112 and the first transportation handle 115 is advanced to move the first left and right elevator rails 113, To place the ferrite on the substrate.

The first left pedestal 113 and the first right pedestal 114 are connected to the control unit 400 so that the ferrite is positioned on the central portion between the first left illuminating unit 121 and the first right illuminating unit 131 Adjust the height. The distance between the ferrite and the first left illuminating unit 121 and the first right illuminating unit 131 is set in the range of 40 to 80 mm by the control unit 400 and the photographing unit obtains a viewing angle of about 180 pi.

The first left illumination unit 121 and the first right illumination unit 131 emit light of a blue color having a luminance of 50 to 150 cd / m 2 and a wavelength of 470 nm or less to the left region Z 1 and the right region Z 2 of the ferrite Investigate.

The first left photographing part 122 and the first right photographing part 132 photograph the left area Z1 and the right area Z2 of the ferrite with a resolution of 20M pixels at 6 fps per second as shown in FIG. And transmits it to the control unit 400. [

When the first visual inspection unit 100 completes the generation of the photographic data for the left area Z1 and the right area Z2 of the ferrite, the first conveying handle 115 advances to transfer the ferrite to the second visual inspection unit 200, To the second transfer module 210 of the second transfer module.

Since the second visual inspection unit 200 is provided so as to be orthogonal to the first visual inspection unit 100, the front and rear bottom surfaces of the ferrite are mounted on the second left mounting base 211 and the second right mounting base 212 . The second feed handle 215 advances to place the ferrite in the vertical direction below the second central illumination unit 221. [

The distance between the ferrite and the second central illuminating unit 221 is set in the range of 40 to 80 mm by the control unit 400 and the light of blue tones having a luminance of 50 to 150 cd / And irradiates the upper central region Z3.

The second central photographing unit 222 photographs the upper central region Z3 of the ferrite as shown in FIG. 13 at 6 fps per second at a resolution of 20 M pixels, generates photographed data, and transmits the photographed data to the control unit 400 .

When photographic data for the upper central region Z3 of the ferrite is generated, the second feed handle 215 advances to position the ferrite on the second left platform 213 and the second platform 214. [

The second left pedestal 213 and the second right pedestal 214 are disposed so that the ferrite is positioned on the central portion between the second left illumination part 231 and the second right illumination part 241 in cooperation with the control unit 400 Adjust the height. The diagonal distance between the ferrite and the second left illumination part 231 and the second right illumination part 241 is positioned within the range of 40 to 80 mm by the control unit 400. [

The second left illumination unit 231 and the second right illumination unit 241 are arranged in such a manner that light of a blue color having a luminance of 50 to 150 cd / m 2 and a wavelength range of 470 nm or less is divided into an upper left zone Z4 and an upper right zone Z5 ).

As shown in FIG. 13, the second left side photographing part 232 and the second right side photographing part 242 are disposed at an upper left zone Z4 and an upper right zone Z5 at a resolution of 20M pixels at 6 fps And generates photographic data, and transfers the photographic data to the control unit 400.

When the second visual inspection unit 200 completes the generation of the photographic data for the upper central region Z3, the upper left region Z4 and the right region Z2 of the ferrite, the second transport handle 215 advances, To be positioned toward the third conveying module 310 of the third visual inspection unit 300.

The third visual inspection unit 300 moves the third transport handle 311 backward to pick up the ferrite from the second left mount table 211 and the second right mount table 212 and to advance the third transport handle 311 The ferrite is positioned on the upper side of the center between the third left illumination section 321 and the third right illumination section 331.

The control unit 400 causes the diagonal distance between the ferrite and the third left illumination unit 321 and the third right illumination unit 331 to be in the range of 40 to 80 mm and the brightness is in the range of 50 to 150 cd / The blue light of 470 nm or less is irradiated to the lower left region Z6 and the lower right region Z7 of the ferrite.

As shown in FIG. 14, the third left side photographing part 322 and the third right side photographing part 332 are formed at a resolution of 20M pixels at 6fps per second, And generates photographic data, and transfers the photographic data to the control unit 400.

When the photographic data for the lower left zone Z6 and the lower right zone Z7 of the ferrite are generated, the third feed handle 311 advances to temporarily mount the ferrite on the third holder 312. [ Since a plurality of third feed handles 311 are provided for the efficiency of the process, the third feed handle 311 is waiting for the ferrite to return to the lower central inspection module 340 during the pick up process.

The third feed handle 311 picks up the ferrite from the third holder 312 and advances it to position the ferrite vertically above the third central illuminator 341.

The distance between the ferrite and the third central illuminating unit 341 is set in the range of 40 to 80 mm by the control unit 400 and the light of the blue color having the brightness in the range of 50 to 150 cd / And irradiates the lower central region Z8.

The third central photographing unit 342 photographs the lower central region Z8 of the ferrite as shown in FIG. 14 at 6 fps per second at a resolution of 20 M pixels, generates photographed data, and transmits the photographed data to the control unit 400 .

When photographed data for the lower central region Z8 of the ferrite is generated, the processing module 410 of the control unit 400 analyzes the photographed data for each region by the machine vision image processing to generate a crack having a size of 50 to 100 mu m And calculates read data. In addition, by applying Machine Vision Deep Learning technology to learn read data, it improves analytical ability, shortening processing time and increasing discrimination power to enable real - time verification.

The control module 420 divides the read data into a good product, a defective product, or a defective product that does not fit the reference value according to the selection criteria, and the control module 420 divides the read data into the second appearance inspection unit 200 Or the operation of the first sorting handle 540 and the second sorting handle 550 of the sorting unit 500. [

The sorting unit 500 is provided with first to third discharge belts 510 to 530 on the respective sides with the first sorting handle 540 and the second sorting handle 550 as the center, Respectively.

When the first sorting handle 540 is hinged by the control unit 400 and is inclined, the ferrite is discharged toward the first discharge stand 510. Or the second sorting handle 550 is advanced by the control unit 400, the ferrite is discharged toward the second discharge stand 520. [ When the first sorting handle 540 and the second sorting handle 550 are not operated, the third transfer handle 311 loads and discharges the ferrite to the third discharge unit 530.

The ferrite discharged through the first to third discharge bands 510 to 530 is unloaded to the loading means so that a predetermined autonomous traveling bogie can be transported and transported into the inspection system of the present invention By implementing this system, the appearance inspection of ferrite and the automatic unattended operation of the entire logistics work can be realized together with the present system.

As described above, the ferrite external vision inspection system according to the present invention can be applied to a ferrite manufacturing system to provide an inspection system for effectively detecting defects such as micro cracks generated in ferrite.

That is, according to the present invention, the inspection module is mounted on eight places in the inspection system so as to realize an accurate visual inspection of each area of a three-dimensional ferrite formed with a curved surface, a corner, etc. to form a left area Z1, a right area Z2, By performing the inspection for the central zone Z3, the upper left zone Z4, the upper right zone Z5, the lower left zone Z6, the lower right zone Z7 and the lower central zone Z8 There is an advantage that the detection error can be minimized and the inspection accuracy can be remarkably improved.

In addition, the present invention can constitute an inspection module employing a 2D area scan camera to construct a high-performance system at low cost, and more particularly, to provide an analysis module capable of analyzing software image processing and machine vision deep- And it is possible to more precisely reflect the position setting and inspection standard of the system in accordance with different specifications and shapes according to the kind of the ferrite as the inspected object.

Accordingly, the present invention significantly increases the work quality and reliability compared to the conventional visual inspection method or the image inspection method using a line scanner camera, and increases the productivity and efficiency of the entire ferrite inspection work through automation of the entire work It is expected that the possibility of industrial use will be very great.

100: first appearance inspection unit 110: first conveyance module
120: Left side inspection module 130: Right side inspection module
200: second appearance inspection unit 210: second conveying module
220: upper central inspection module 230: upper left inspection module
240: upper right side inspection module 300: third appearance inspection unit
310: Third transfer module 320: Lower left inspection module
330: Lower right side inspection module 340: Lower right side inspection module
400: control unit 410: processing module
420: control module 500: sorting unit
510 to 530: first discharge unit to third discharge unit 540: first sorting handle
550: 2nd selection handle

Claims (11)

A first appearance inspection unit 100 for loading ferrite and generating photographic data of the left area Z1 and the right area Z2 and a second appearance inspection unit 100 for receiving ferrite from one side of the first appearance inspection unit 100, A second exterior inspection unit 200 for generating photographic data of the upper left area Z3, the upper left area Z4 and the upper right area Z5; a second exterior inspection unit 200 for receiving the ferrite from one side of the second exterior inspection unit 200, A third visual inspection unit 300 for generating photographic data of a lower right zone Z6, a lower right zone Z7 and a lower central zone Z8; and a third visual inspection unit 300 for receiving photographic data for the areas, And a screening unit (500) for transferring the ferrite from one side of the third exterior inspection unit (300) and interlocking with the control unit (400) to selectively discharge the ferrite. In the system,
The first visual inspection unit (100)
A first transfer module 110 for loading and transferring ferrite in a row,
A left side inspection module 120 having a first left side portion 123 for horizontally aligning and mounting the first left illumination portion 121 and the first left side imaging portion 122 from the left side of the first conveyance module 110, )and,
A first right side portion 133 (see FIG. 1) for horizontally aligning and mounting the first right illumination portion 131 and the first right side imaging portion 132 so as to face the left side inspection module 120 on the right side of the first conveyance module 110, , And a right side inspection module (130)
The first left illumination section 121 and the first right illumination section 131 are provided in a dome shape forming a center hole at a rear vertex,
The first left imaging section 122 and the first right imaging section 132 are configured to position the lens so as to face the center hole from the rear of the first left illumination section 121 and the first right illumination section 131 Wherein the ferrite outer appearance vision inspection system is a ferrite outer appearance vision inspection system. delete The method according to claim 1,
The first conveying module 110 includes:
A first left holder 111 and a first right holder 112 arranged in two rows parallel to the feeding direction of the ferrite,
A first left pedestal 113 and a first right pedestal 113 mounted on the first left pedestal 111 and the first right pedestal 112 between the first left illumination part 121 and the first right illumination part 131, 114,
And a plurality of first transport handles (115) for feeding ferrite units one above the first left pallet base (111) and the first right pallet base (112)
A first adjusting module 116 is installed on one side of the first conveying module 110 and the first left leg cradle 111 and the first left leg elevator 113 are integrally formed with the left side inspection module 120, Wherein the distance between the right side elevation base (112) and the first right side elevation base (114) right side inspection module (130) is adjusted. The method according to claim 1,
The second visual inspection unit (200)
A second conveying module 210 for conveying and transporting the ferrite passing through the first external inspection unit 100 in a line;
An upper central inspection module 220 having a second central positional portion 223 vertically aligning and mounting the second central illuminating portion 221 and the second central photographing portion 222 on the upper side of the second conveying module 210, ;
And a second left position part 233 for aligning and mounting the second left illumination part 231 and the second left imaging part 232 in the oblique direction from the upper left side of the second transfer module 210. [ (230); And
A second right side positioning part 242 which aligns and mounts the second right side illumination part 241 and the second right side photographing part 242 in an oblique direction so as to be symmetrical to the upper left side inspection module 230 from the upper right side of the second conveyance module 210, (240) having an upper right side inspection module (243)
The second central illumination part 221, the second left illumination part 231 and the second right illumination part 241 are provided in a dome shape forming a center hole at a rear vertex,
The second central photographing unit 222, the second left photographing unit 232 and the second right photographing unit 242 are arranged in the order of the second central illumination unit 221, the second left illumination unit 231, And the lens is positioned so as to face the center hole from the rear side of the outer surface (241). 5. The method of claim 4,
The second conveying module (210)
A second left cradle 211 and a second right cradle 212 provided in two rows parallel to the feeding direction of the ferrite,
The second left pedestal 213 and the second right pedestal 211 mounted on the second left pedestal 211 and the second right pedestal 212 between the second left illumination part 231 and the second right illumination part 241, 214,
And a second feed handle (215) for feeding the ferrite unit by one unit from one side of the second left holder (211) and the second right holder (212)
A second adjusting module 216 is installed on one side of the second conveying module 210 so that the second left supporting table 211 and the second left supporting table 213 and the second right supporting table 212 and 2, the distance between the right side platform 214 and the right side platform 214 is adjusted,
Third adjusting means to fifth adjusting means 224, 234 and 244 are mounted on the second center-position portion 223, the second left-side position portion 233 and the second right-side position portion 243, 220), the upper left inspection module (230), and the upper right inspection module (240) to adjust the distance between the second transfer module (210) and the second transfer module (210). The method according to claim 1,
The third visual inspection unit (300)
A third transfer module 310 for picking up and transferring the ferrite passing through the second external inspection unit 200 by one unit;
And a third left positioning part 323 for aligning and mounting the third left illumination part 321 and the third left imaging part 322 in the oblique direction from the lower left side of the third transfer module 310. [ (320);
A third right side position part 332 for aligning and mounting the third right side illumination part 331 and the third right side photographing part 332 in the oblique direction so as to be symmetrical to the lower left side inspection module 320 from the lower right side of the third conveyance module 310, A lower right side inspection module 330 having a lower right side inspection module 333; And
A lower central inspection module 340 having a third central position 343 vertically aligning and mounting the third central illumination part 341 and the third central photographing part 342 from below the third transfer module 310, ≪ / RTI >
The third left illumination section 321, the third right illumination section 331 and the third central illumination section 341 are provided in a dome shape forming a center hole at a rear vertex,
The third left side photographing part 322, the third right side photographing part 332 and the third central photographing part 342 correspond to the third left illumination part 321, the third right illumination part 331, And the lens is positioned so as to face the center hole from the rear side of the outer casing (341). The method according to claim 6,
The third conveying module 310,
A plurality of third feed handles 311 for picking up the ferrite units one by one,
And a third holder 312 for temporarily loading the ferrite between the third transfer handles 311,
Sixth to eighth adjusting means 324, 334 and 344 are mounted on the third center position 343, the third left position portion 323 and the third right position portion 333, respectively, 340), the lower left inspection module (320), and the lower right inspection module (330) to adjust the distance between the third transfer module (310) and the third transfer module (310). The method according to claim 1,
The photographing unit mounted on the first to third visual inspection units 100 to 300 to photograph areas of the ferrite is an area scan camera having a resolution of 20 M pixels or more and a frame rate per second of 6 fps or more Ferrite exterior vision inspection system. The method according to claim 1,
The illuminating unit mounted on the first to third external inspection units 100 to 300 and irradiating light toward the regions of the ferrite,
The distance between the ferrite and the ferrite is in the range of 40 to 80 mm so that the imaging portion has a viewing angle of three times the area of the ferrite size,
Wherein the ferrite external visual inspection system is a spotlight having a luminance of 50 to 150 cd / m 2 and a wavelength of 470 nm or less. The method according to claim 1,
The control unit (400)
A processing module (410) for receiving photographic data from the first to third visual inspection units (100 to 300) and performing image processing and calculating read data; And
And a control module (420) that operates the sorting unit (500) in accordance with the read data in association with the processing module (410)
Wherein the processing module (410) is configured to improve the analysis capability in real time by learning the read data by applying a machine vision deep learning technique. The method according to claim 1,
The sorting unit (500)
A first discharge unit to a third discharge unit 510 to 530 for respectively unloading good, defective, and stored ferrites by providing different paths around the lower side of one side of the third transfer module 310;
A first sorting handle 540 horizontally provided at the center of the first to third discharge bands 510 to 530 and hinged to the first discharge boss 510 in cooperation with the control module 420; And
And a second sorting handle (550) provided at an upper portion of one side of the first sorting handle (540) and traversing toward the second discharge stand (520) in cooperation with the control module (420) Inspection system.

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