WO2017111414A1 - 핀홀 또는 홀 검출 장치 및 방법 - Google Patents
핀홀 또는 홀 검출 장치 및 방법 Download PDFInfo
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- WO2017111414A1 WO2017111414A1 PCT/KR2016/014901 KR2016014901W WO2017111414A1 WO 2017111414 A1 WO2017111414 A1 WO 2017111414A1 KR 2016014901 W KR2016014901 W KR 2016014901W WO 2017111414 A1 WO2017111414 A1 WO 2017111414A1
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- lighting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/894—Pinholes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8812—Diffuse illumination, e.g. "sky"
- G01N2021/8816—Diffuse illumination, e.g. "sky" by using multiple sources, e.g. LEDs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8835—Adjustable illumination, e.g. software adjustable screen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8841—Illumination and detection on two sides of object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
- G01N2021/8893—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques providing a video image and a processed signal for helping visual decision
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N2021/8909—Scan signal processing specially adapted for inspection of running sheets
- G01N2021/8911—Setting scan-width signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8918—Metal
Definitions
- the present application relates to an apparatus and method for detecting pinholes or holes present in various kinds of steel sheets and the like.
- Holes or pinholes are generally used when rolling materials in cold rolling mills (for example, cold rolling mills, electrical steel mills, and stainless steel mills) in steel processes. Occurs due to When a product for pressure or a product containing contents is made of a steel plate having such a hole or a pinhole, a pressure leak or a content leak occurs due to the hole or the pinhole. Therefore, a thorough inspection of the presence or absence of a hole or a pinhole, etc. is necessary before delivering a steel plate etc. to a customer.
- a detection device capable of accurately detecting holes and / or pinholes present in steel materials such as steel sheets, non-steel materials, and the like is provided.
- a detection method capable of accurately detecting holes and / or pinholes present in steel or non-steel materials such as steel sheets.
- the detection apparatus is an illumination unit for irradiating light from one side of the material, a light receiving unit for obtaining an image of the material from the other side of the material and outputs a detection signal, the detection signal to the material And a detector configured to determine whether a hole or a pinhole exists, and an illumination controller configured to classify the illumination unit into a plurality of regions and control the illumination unit to irradiate light having different illuminance for each region.
- the illumination unit of the detection apparatus may include a plurality of LEDs.
- the light receiving unit of the detection apparatus may include a plurality of cameras.
- the detection device may further include a condenser lens disposed between the illumination unit and the material.
- the illumination control unit of the detection apparatus may set an adjustment area of the illumination unit based on the position of the camera of the light receiver and the position of the edge of the material.
- the illumination control unit of the detection apparatus sets an area not included in the adjustment area as the center area in the illumination unit, and surrounds an area corresponding to an outer portion of the edge of the material among the adjustment areas.
- An area may be set, and an edge area may be set between the outer area and the center area.
- the central region of the illumination unit irradiates light having a first illuminance
- the outer region of the illumination unit has a second illuminance lower than the first illuminance.
- the light may be irradiated
- the edge area of the lighting unit may control the lighting unit to irradiate light having an illuminance between the first illuminance and the second illuminance.
- the first illuminance may be illuminance capable of detecting a hole or a pinhole existing in the material
- the second illuminance may be illuminance such that a reference light amount is incident on the camera of the light receiver.
- the reference amount of light may be a minimum amount of light for the camera included in the light receiving unit to output a maximum brightness value.
- the edge area may be irradiated with light of the linearly increased from the second illuminance to the first illuminance from the outer to the center.
- the lighting control unit of the detection apparatus sets the area of the lighting unit when the welding portion welded the preceding material and the trailing material in the material passes through the detection device, or when the material meanders An area of the lighting unit may be set.
- a detection method is a detection method for detecting a hole or a pinhole present in the material by using an illumination unit disposed below the material and the light receiving unit disposed above the material, wherein the plurality of illumination units And dividing the light into three regions, and controlling the lighting unit to irradiate light having different illuminance for each of the plurality of regions.
- the dividing of the detection method may include setting an adjustment area based on the position of the camera included in the light receiving unit and the position of the edge of the material, and an area not included in the adjustment area. May be set as a center area, an area corresponding to an outer portion of the edge of the material among the adjustment areas as an outer area, and an edge area between the outer area and the center area as an edge area. .
- the central region is irradiated with light having a first illuminance
- the outer region is irradiated with light having a second illuminance lower than the first illuminance.
- the edge region may control the lighting unit to irradiate light having an illuminance between the first illuminance and the second illuminance.
- the dividing of the detection method according to an embodiment of the present invention may be performed when a welding part welded to the preceding material and the following material in the material passes through the lighting unit and the light receiving unit, or the material meanders. Can be.
- the detection apparatus and the detection method according to an embodiment of the present invention can accurately detect a hole and / or a pinhole existing in a portion close to the edge of the material.
- FIG. 1 is a view schematically showing a detection apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram for describing a method of setting an edge part of an illumination unit in a detection apparatus and a detection method according to an exemplary embodiment of the present disclosure.
- FIG 3 is a view for explaining a method of setting the brightness of the lighting unit in the detection apparatus and the detection method according to an embodiment of the present invention.
- FIG. 4 is a view schematically showing an embodiment of a method of controlling an illumination unit according to a detection apparatus and a detection method according to an embodiment of the present invention.
- FIG. 5 is a view schematically illustrating an embodiment of a method of controlling an illumination unit according to a detection apparatus and a detection method according to an embodiment of the present invention.
- FIG. 6 is a diagram for describing a time point of setting an area of an illumination unit in a detection apparatus and a detection method according to an exemplary embodiment of the present disclosure.
- FIG. 7 shows an embodiment of an image of a steel sheet obtained by the light receiving unit of the detection apparatus according to an embodiment of the present invention.
- FIG. 8 is a flowchart illustrating a detection method according to an embodiment of the present invention.
- the detection device according to an embodiment of the present invention is an illumination unit 10, a light receiving unit 30, an illumination control unit 40, and a detection unit ( 50).
- the detection device according to an embodiment of the present invention may further include a lens 20.
- the lighting unit 10 may include a plurality of LEDs 11.
- the light receiver 30 may include at least one or more cameras 31, 32, and 33.
- the lighting unit 10 may be disposed under the material 1 to irradiate light.
- the lighting unit 10 may emit light having different illuminance for each region under the control of the lighting controller 40.
- the central region of the lighting unit 10, which is a position corresponding to the central portion of the raw material 1 may irradiate light having a first illuminance
- the outer region of) may irradiate light having a second illuminance lower than the first illuminance
- the edge region of the lighting unit 10 between the center region and the outer region has an illuminance between the first illuminance and the second illuminance. Light can be irradiated.
- the first illuminance is an illuminance capable of detecting a hole and / or a pinhole present in the material 1, and may be sufficiently high illuminance, and the second illuminance is based on the camera 31 or 33 of the light receiving unit 30.
- the illuminance may be such that the amount of light is incident.
- the reference light amount may be a light amount that maximizes the brightness value of the image acquired by the camera 31 or 33.
- the reference light amount may be the minimum light amount that causes the camera 31 or 33 to output 255 as the brightness value.
- the reference light amount may be determined by the characteristics of the image sensor of the camera 31 or 33 and the aperture value. If the amount of light equal to or greater than the reference light amount is incident on the camera 31 or 33, the image sensor may deteriorate. Therefore, the detection apparatus and the detection method according to an embodiment of the present invention can prevent deterioration of the image sensor of the camera by adjusting the illuminance of the light irradiated from the outer region of the illumination unit 10 to the second illuminance.
- the edge area of the lighting unit 10 may irradiate light with a linear increase in intensity from the second illuminance to the first illuminance from the outside toward the inside.
- the light receiver 30 may be disposed above the material 1. Light passing through the material 1 is incident on the light receiving unit 30, and the light receiving unit 30 may output a detection signal according to the amount of incident light. As described above, the light receiving unit 30 may include at least one or more cameras 31, 32, and 33. In this case, an image signal output from each of the cameras 31, 32, and 33 may be detected. Can be. The number of cameras may be determined according to the size of the hole and / or pinhole to be detected and the size of the material.
- the lighting controller 40 may set an area of the lighting unit 10 according to the width of the material 1, and control the lighting unit 10 so that the lighting unit 10 emits light of appropriate illumination for each area.
- the detector 50 may determine whether a hole and / or a pinhole exist in the material 1 based on the detection signal received from the light receiver 30.
- the detector 50 may determine the positions of the holes and / or the pinholes when the holes and / or the pinholes are present.
- the detector 50 may grasp the position of the edge of the material 1 based on the detection signal.
- the detection unit 50 provides the position of the edge of the material 1 to the illumination control unit 40, and the illumination control unit 40 uses the position of the edge of the material 1 to cover the area of the illumination unit 10. Can be set.
- the detection apparatus may further include a condenser lens 20 between the material 1 and the illumination unit 10.
- a condenser lens 20 By using the condenser lens 20, the use efficiency of light can be improved.
- the lighting controller 40 and / or the detector 50 may include at least one processing unit and a memory.
- the processing unit may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), field programmable gate arrays (FPGA), and the like. It may have a plurality of cores.
- the memory may be volatile memory (eg, RAM, etc.), nonvolatile memory (eg, ROM, flash memory, etc.), or a combination thereof. In the memory, a program for performing a detection method according to an embodiment of the present invention may be loaded.
- the lighting control unit 40 and / or the detection unit 50 may include additional storage.
- Storage includes, but is not limited to, magnetic storage, optical storage, and the like.
- the storage may store computer readable instructions for implementing the wireless power transmission method according to an embodiment of the present invention, and other computer readable instructions for implementing an operating system, an application program, and the like. Computer readable instructions stored in the storage may be loaded into the memory for execution by the processing unit.
- the lighting controller 40 and the detector 50 may be implemented as one processing unit and one memory.
- FIG. 2 is a diagram for describing a method of setting a brightness adjusting area, that is, an outer area and an edge area of an illumination unit in a detection device and a detection method according to an embodiment of the present invention.
- identification code 1-1 represents a material having a minimum width
- identification code 1-2 represents a material having a maximum width.
- the first adjustment area and the second adjustment area mean areas in which the brightness is adjusted in the lighting unit 10, and these areas may be up to about several tens of mm inwardly from the minimum width of the material.
- the first adjustment area and the second adjustment area may be determined by the distance between the material and the light, the distance between the camera and the material, and the like.
- a first adjustment area that is a brightness adjustment area of the left part of the lighting unit 10 is set. The following describes the method.
- the leftmost LED is located slightly inward from the illumination at the position shown when the diagonal line is passed through the end of the material 1-1 having the smallest width in the leftmost camera 31.
- the LED located in becomes the first adjustment area. That is, since the lighting unit 10 at the position corresponding to the center of the material is very bright, when this light enters the camera, white noise is generally generated in the camera, which is a problem in image acquisition. Therefore, in order to secure a stable image, the first adjustment area is set as described above.
- the setting of the second adjustment region may also be made in the same manner as the setting of the first adjustment region.
- the first adjustment area and the second adjustment area may be set in the same manner as described above.
- FIG 3 is a view for explaining a method of setting the brightness of the lighting unit in the detection apparatus and the detection method according to an embodiment of the present invention.
- the lighting unit 10 includes a central region C corresponding to the central portion of the material, outer regions OL and OR corresponding to the outer portion of the material, and a central region C and the outer region ( Edge regions EL and ER, which are regions between OL and OR.
- the first outer region OL and the first edge region EL of the regions correspond to the first adjustment region of FIG. 2, and the second outer region OR and the second edge region ER of FIG. It corresponds to a 2nd adjustment area.
- the lighting controller 40 of FIG. 1 may set an area of the lighting unit 10. Specifically, the first adjustment area and the second adjustment area are set by the method described with reference to FIG. 2. To this end, the illumination control unit 40 of FIG. 1 may use information about the position of the camera 31 or 33 and the edge of the material provided from the detection unit 50 of FIG. 1. Next, a portion other than the first adjustment region and the second adjustment region is set as the central region C, and regions corresponding to the outer portion of the material in each of the first adjustment region and the second adjustment region are outer regions OL. , OR), and regions corresponding to the outer portion of the material in each of the first adjustment region and the second adjustment region, which are not set as the outer regions OL and OR, to the edge regions EL and ER. Can be set.
- the lighting controller 40 of FIG. 1 may control the lighting unit 10 such that the lighting unit 10 irradiates light having different illuminance for each region. That is, as shown in FIG. 3, the central region C of the lighting unit 10 irradiates light having a first illuminance having a sufficiently high illuminance capable of detecting holes and / or pinholes present in the material 1.
- the outer regions OL and OR of the lighting unit 10 irradiate the light having the second illuminance so that the reference light amount is incident on the camera 31 or 33 of the light receiving unit 30, and the edge region of the lighting unit 10.
- the fields EL and ER may irradiate light of the illuminance linearly increasing from the second illuminance to the first illuminance from the outer to the inner side.
- FIG. 4 is a view schematically showing an embodiment of a method of controlling an illumination unit according to a detection apparatus and a detection method according to an embodiment of the present invention.
- the lighting control unit 40-1 controls the lighting unit 10-1 so that the lighting unit 10-1 emits light in the same pattern as that shown in FIG. 3, but the lighting unit 10-1 is controlled.
- Each of the modules 10-11 to 10-14 may include a plurality of LEDs.
- Each of the plurality of modules 10-11 to 10-14 may have a length of 10 to 20 mm.
- the LEDs of one module may have the same brightness of light.
- FIG. 5 is a view schematically illustrating an embodiment of a method of controlling an illumination unit according to a detection apparatus and a detection method according to an embodiment of the present invention.
- the lighting controller 40-2 may individually control each of the LEDs 11-1 to 11-n constituting the lighting unit 10.
- FIG. 6 is a diagram for describing a time point of setting an area of an illumination unit in a detection apparatus and a detection method according to an exemplary embodiment of the present disclosure.
- the lighting control unit (40 in FIG. 1, etc.) sets the area of the lighting unit (10 in FIG. 1). As shown in FIG. 6, when the width of the preceding material differs from the width of the trailing material, the lighting control unit may set the area of the lighting unit at the point in time when the welded part of the preceding material and the trailing material communicate with the detection device.
- the lighting control unit receives information about the width of each of the preceding material and the following material and the position of the welded part from the outside (for example, a processor controlling the overall process), and a few meters before the welded part reaches the detection device, That is, the operation for setting the area starts when the point A1 in FIG. 6 reaches the detection device.
- the illumination control part controls the illumination part so that the whole illumination part irradiates the light which has illuminance for detecting the edge of a raw material (especially trailing material).
- the detection unit detects the position of the edge of the workpiece, and the illumination controller sets the regions of the illumination unit, that is, the central region, the outer region, and the edge region using the position of the edge of the workpiece.
- the setting of the area may be performed after a few m after the weld passes through the detection device, that is, until the point A2 in FIG. 6 passes through the detection device. Thereafter, the lighting controller adjusts the intensity of light irradiated from the lighting unit for each set region.
- the area resetting may be performed whenever necessary or may be periodically performed.
- area resetting may be performed when meandering of the material occurs. Whether or not the meandering of the material is generated may be determined based on a detection signal received from the light receiver in the detector.
- FIG. 7 shows an embodiment of an image of a steel sheet obtained by the light receiving unit of the detection apparatus according to an embodiment of the present invention. As shown in Fig. 7, it can be seen that pinholes and edges present in the edge portion are obtained very clearly in the image.
- FIG. 8 is a flowchart illustrating a detection method according to an embodiment of the present invention.
- the adjustment area is set in the lighting unit (S100). Thereafter, the area of the lighting unit can be subdivided into a central area, an outer area, and an edge area. Specific operations thereof will be readily understood with reference to the descriptions of FIGS. 2 and 3.
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Abstract
Description
Claims (20)
- 소재에 존재하는 홀 또는 핀홀을 검출하는 검출 장치에 있어서,소재의 일측에서 광을 조사하는 조명부;상기 소재의 타측에서 상기 소재에 대한 영상을 획득하여 검출 신호를 출력하는 수광부;상기 검출 신호를 이용하여 상기 소재에 홀 또는 핀홀이 존재하는지 여부를 판단하는 검출부; 및상기 조명부를 복수개의 영역으로 구분하고, 각 영역별로 서로 다른 조도를 가지는 광이 조사되도록 상기 조명부를 제어하는 조명 제어부를 포함하는 검출 장치.
- 제1항에 있어서, 상기 조명부는복수개의 LED를 포함하는 검출 장치.
- 제1항에 있어서, 상기 수광부는복수개의 카메라를 포함하는 검출 장치.
- 제1항에 있어서, 상기 검출 장치는상기 조명부와 상기 소재 사이에 배치되는 집광 렌즈를 더 포함하는 검출 장치.
- 제1항에 있어서, 상기 조명 제어부는상기 수광부의 카메라의 위치와 상기 소재의 에지의 위치를 기초로 상기 조명부의 조정 영역을 설정하는 검출 장치.
- 제1항에 있어서, 상기 조명 제어부는상기 조명부에서 상기 조정 영역에 포함되지 않는 영역을 중앙 영역으로 설정하고, 상기 조정 영역 중 상기 소재의 에지의 바깥 부분에 대응하는 영역을 외곽 영역으로 설정하고, 상기 외곽 영역과 상기 중앙 영역의 사이를 에지 영역으로 설정하는 검출 장치.
- 제6항에 있어서, 상기 조명 제어부는상기 조명부의 상기 중앙 영역은 제1 조도를 가지는 광을 조사하고, 상기 조명부의 상기 외곽 영역은 상기 제1 조도보다 낮은 제2 조도를 가지는 광을 조사하고, 상기 조명부의 상기 에지 영역은 상기 제1 조도와 상기 제2 조도 사이의 조도를 가지는 광을 조사하도록 상기 조명부를 제어하는 검출 장치.
- 제7항에 있어서,상기 제1 조도는 상기 소재에 존재하는 홀 또는 핀홀을 검출할 수 있는 조도이고, 상기 제2 조도는 상기 수광부의 카메라로 기준 광량이 입사되도록 하는 조도인 검출 장치.
- 제8항에 있어서,상기 기준 광량은 상기 수광부에 포함되는 카메라가 최대 밝기값을 출력하기 위한 최소 광량인 검출 장치.
- 제7항에 있어서,상기 에지 영역은 외곽에서 중앙으로 갈수록 상기 제2 조도에서 상기 제1 조도로 선형적으로 증가하는 조도의 광을 조사하는 검출 장치.
- 제1항에 있어서, 상기 조명 제어부는상기 소재에서 선행재와 후행재가 용접된 용접부가 상기 검출 장치를 통과하는 경우에 상기 조명부의 영역을 설정하는 검출 장치.
- 제1항에 있어서, 상기 조명 제어부는상기 소재가 사행하는 경우에 상기 조명부의 영역을 설정하는 검출 장치.
- 소재의 하부에 배치된 조명부와 상기 소재의 상부에 배치된 수광부를 이용하여 상기 소재에 존재하는 홀 또는 핀홀을 검출하는 검출 방법에 있어서,상기 조명부를 복수개의 영역으로 구분하는 단계; 및상기 복수개의 영역별로 상이한 조도의 광이 조사되도록 조명부를 제어하는 단계를 포함하는 검출 방법.
- 제13항에 있어서, 상기 구분하는 단계는상기 수광부에 포함되는 카메라의 위치와 상기 소재의 에지의 위치를 기초로 조정 영역을 설정하는 단계; 및상기 조정 영역에 포함되지 않는 영역을 중앙 영역으로 설정하고, 상기 조정 영역 중 상기 소재의 에지의 바깥 부분에 대응하는 영역을 외곽 영역으로 설정하고, 상기 외곽 영역과 상기 중앙 영역의 사이를 에지 영역으로 설정하는 단계를 포함하는 검출 방법.
- 제14항에 있어서, 상기 조명부를 제어하는 단계는상기 중앙 영역은 제1 조도를 가지는 광을 조사하고, 상기 외곽 영역은 상기 제1 조도보다 낮은 제2 조도를 가지는 광을 조사하고, 상기 에지 영역은 상기 제1 조도와 상기 제2 조도 사이의 조도를 가지는 광을 조사하도록 상기 조명부를 제어하는 검출 방법.
- 제15항에 있어서,상기 제1 조도는 상기 소재에 존재하는 홀 또는 핀홀을 검출할 수 있는 조도이고, 상기 제2 조도는 상기 수광부의 카메라로 기준 광량이 입사되도록 하는 조도인 검출 방법.
- 제16항에 있어서,상기 기준 광량은 상기 수광부에 포함되는 카메라가 최대 밝기값을 출력하기 위한 최소 광량인 검출 방법.
- 제15항에 있어서, 상기 조명부를 제어하는 단계는상기 에지 영역은 외곽에서 중앙으로 갈수록 상기 제2 조도에서 상기 제1 조도로 선형적으로 증가하는 조도의 광을 조사하도록 조명부를 제어하는 검출 방법.
- 제13항에 있어서, 상기 구분하는 단계는상기 소재에서 선행재와 후행재가 용접된 용접부가 상기 조명부 및 상기 수광부를 통과하는 경우에 수행되는 검출 방법.
- 제13항에 있어서, 상기 구분하는 단계는상기 소재가 사행하는 경우에 수행되는 검출 방법.
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CN201680076235.6A CN108474749A (zh) | 2015-12-24 | 2016-12-19 | 针孔或孔检测装置和方法 |
EP16879281.0A EP3396361A4 (en) | 2015-12-24 | 2016-12-19 | PINHOLE OR HOLE DETECTING DEVICE AND METHOD |
JP2018532688A JP2018538544A (ja) | 2015-12-24 | 2016-12-19 | ピンホール又はホールの検出装置及び方法 |
US16/063,992 US20190003986A1 (en) | 2015-12-24 | 2016-12-19 | Pinhole or hole detection device and method |
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KR1020150185910A KR101767784B1 (ko) | 2015-12-24 | 2015-12-24 | 핀홀 또는 홀 검출 장치 및 방법 |
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US (1) | US20190003986A1 (ko) |
EP (1) | EP3396361A4 (ko) |
JP (1) | JP2018538544A (ko) |
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CN113751921A (zh) * | 2021-09-28 | 2021-12-07 | 长春一汽宝友钢材加工配送有限公司 | 激光拼焊板气孔缺陷自动检测系统 |
US11345260B2 (en) | 2019-06-19 | 2022-05-31 | Hyundai Transys Incorporated | Seat pumping device for vehicle |
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KR102149280B1 (ko) * | 2018-11-28 | 2020-08-28 | 한화정밀기계 주식회사 | 기준 좌표 동기화 장치 |
US11774368B2 (en) | 2022-01-03 | 2023-10-03 | Rick Ross | Light table apparatus and methods for inspecting heat exchanger plates for defects using light |
CN114717832B (zh) * | 2022-04-18 | 2023-06-02 | 江苏天鸟高新技术股份有限公司 | 一种纺织用断针的快速检测方法 |
CN114813759B (zh) * | 2022-06-24 | 2022-09-09 | 四川英创力电子科技股份有限公司 | 一种精密检测印制电路板上孔数的检孔装置及方法 |
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- 2016-12-19 US US16/063,992 patent/US20190003986A1/en not_active Abandoned
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KR20170076863A (ko) | 2017-07-05 |
KR101767784B1 (ko) | 2017-08-14 |
EP3396361A1 (en) | 2018-10-31 |
US20190003986A1 (en) | 2019-01-03 |
CN108474749A (zh) | 2018-08-31 |
JP2018538544A (ja) | 2018-12-27 |
EP3396361A4 (en) | 2019-01-30 |
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