KR100956932B1 - Lighting unit for automatic visual inspection machine - Google Patents

Lighting unit for automatic visual inspection machine Download PDF

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KR100956932B1
KR100956932B1 KR1020080014227A KR20080014227A KR100956932B1 KR 100956932 B1 KR100956932 B1 KR 100956932B1 KR 1020080014227 A KR1020080014227 A KR 1020080014227A KR 20080014227 A KR20080014227 A KR 20080014227A KR 100956932 B1 KR100956932 B1 KR 100956932B1
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lighting device
tablet
white led
led light
tablets
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KR20090088762A (en
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김영민
김석훈
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주식회사 에스디티
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's

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Abstract

본 발명은 정제외관검사용 조명장치에 관한 것이다. 더욱 상세하게는 정제 외관을 검사하는 자동 외관검사장치에 설치되어 반송되는 정제의 고속촬상시에 정제를 고휘도로 균일 조명하여 정제 외관의 결손을 검출하기 위한 정제외관검사용 조명장치에 관한 것이다. 본 발명은 정부에 촬상용 개구부와 저부에 정제반송용 통과구를 갖는 금속제 돔형 조명장치에 있어서, 상기 조명장치내로 반송된 정제를 조명하기 위해 상기 정제를 촬상하는 광축주위에 원환형상으로 상기 조명장치의 내주면에 삽입한 백색LED광원과 상기 백색LED광원에서 발생하는 열을 외부로 방출하기 위하여 상기 조명장치의 외주면에 코팅한 열전도성 절연물질을 개재부로 하여 금속제 방열판을 조립장착되는 것을 특징으로 한다.

본 발명은 조명장치내로 반송된 정제를 촬상장치의 광축주위에 다수의 원환형상으로 배열된 다수의 백색LED광원으로 고휘도이며 균등한 광량의 조사로 균일하게 조명할 수 있고, 조명장치의 외주면에 조립장착된 금속제 방열판에 의해 백색LED광원에서 발생되는 열이 외부로 방출되어 조명장치의 성능이 향상되는 잇점이 있다.

Figure R1020080014227

정제외관검사, 조명장치, 돔형 조명장치, 백색LED,광원, 방열판, 고속촬상

The present invention relates to a lighting apparatus for tablet appearance inspection. More particularly, the present invention relates to a tablet exterior inspection lighting device for detecting defects in the appearance of tablets by uniformly illuminating the tablets at high brightness during high-speed imaging of tablets which are installed in an automatic appearance inspection device for inspecting the appearance of tablets. The present invention relates to a metal dome-type lighting apparatus having an opening for image pickup and a passage for feeding tablets at a bottom thereof, wherein the lighting apparatus is annularly around an optical axis for imaging the tablet to illuminate the tablet conveyed into the lighting apparatus. A metal heat sink is assembled and mounted with a white LED light source inserted into an inner circumferential surface thereof and a thermally conductive insulating material coated on an outer circumferential surface of the lighting device to emit heat generated from the white LED light source to the outside.

The present invention can uniformly illuminate the tablets conveyed into the lighting device with a plurality of white LED light sources arranged in a plurality of annular shapes around the optical axis of the imaging device by irradiation of high brightness and uniform light quantity, and assembled on the outer peripheral surface of the lighting device. The heat generated from the white LED light source is discharged to the outside by the metal heat sink mounted therein, which improves the performance of the lighting device.

Figure R1020080014227

Tablet visual inspection, lighting device, dome type lighting device, white LED, light source, heat sink, high speed photography

Description

정제외관검사용 조명장치{LIGHTING UNIT FOR AUTOMATIC VISUAL INSPECTION MACHINE}LIGHTING UNIT FOR AUTOMATIC VISUAL INSPECTION MACHINE}

본 발명은 정제외관검사용 조명장치에 관한 것으로, 더욱 상세하게는 정제외관을 검사하는 자동 외관검사장치에 설치되어 반송되는 정제의 고속촬상시에 정제를 고휘도로 균일 조명하여 정제 외관의 결손, 이물질, 크랙, 파손, 각인불량 등의 외관결손을 검출하기 위한 정제외관검사용 조명장치에 관한 것이다.The present invention relates to a lighting apparatus for tablet appearance inspection, and more particularly, to uniformly illuminate the tablet with high brightness at the time of high-speed imaging of the tablet is installed in the automatic appearance inspection device for inspecting the appearance of tablets, defects in the appearance of the tablet, foreign matter The present invention relates to a lighting device for tablet visual inspection for detecting appearance defects such as cracks, cracks, and imprint defects.

정제외관검사장치는 피검사물인 정제의 수평반송방향에 따라서 호퍼(HOPPER, 56), 바이브레이터(VIBRATOR)를 가지는 피더(FEEDER, 59), 정제정류장치(64), 벨트컨베이어(BELT CONVEYOR, 66), 제1의 반송장치 X1(33), 제2의 반송장치 X2(43) 및 정제선별기구(53)가 순서로 배열되어 구성되어있다. 정제선별기구의 하부에는 양품회수용 박스(35), 불량품 회수용 박스(45)가 설치된다.Tablet visual inspection device is a feeder (59), tablet rectifier (64), belt conveyor (BELT CONVEYOR, 66) having a hopper (HOPPER, 56), vibrator (VIBRATOR) in accordance with the horizontal transport direction of the tablet to be inspected The 1st conveyance apparatus X133, the 2nd conveyance apparatus X243, and the refinement | selection sorting mechanism 53 are arrange | positioned in order. The lower part of the tablet selection mechanism is provided with a good quality recovery box 35 and a bad quality recovery box 45.

정제외관검사장치에서, 반송장치 X1(33), X2(43)는 진공컨베이어(66)로 피검사물인 정제(T)를 컨베이어에 흡착한 상태로 반송한다. 그리고 연속공정인 반송과정에서 외관검사장치 T1 ∼ T6로 피검사물 정제(T) 외관의 결손 유무를 검출하며, 이것에 근거해 선별기구(53)로 피검사물 정제(T)의 양품/불량품 배분을 한다. 외관 검사장치 T1 ∼ T6에서는 피검사물 정제(T)의 표면방사광을 촬상하는 라인(LINE) CCD, 표면방사광을 라인(LINE) CCD에 결상하는 촬상광학계, 피검사물 정제(T)를 조명하는 조명장치가 설치되어 반송되는 피검사물 정제(T)를 광원(램프)에서 출사하는 광으로 조명하면서 CCD 카메라, 또는 이미지센서(라인센서 카메라)로 피검사물 정제(T) 외관의 결손을 검출한다.In the tablet visual inspection apparatus, the conveying apparatuses X1 (33) and X2 (43) convey the tablet T, which is the inspected object, on the conveyor by the vacuum conveyor 66. In the conveyance process, which is a continuous process, the external inspection device T1 to T6 detects whether there is a defect in the external appearance of the inspected tablet T, and based on this, the distribution of the good / bad article of the inspected tablet T by the sorting mechanism 53 is determined. do. In the external inspection apparatuses T1 to T6, a line CCD for imaging the surface radiation of the inspected tablet T, an imaging optical system for imaging the surface radiation on a line CCD, and an illumination device for illuminating the inspected tablet T The defect of the external appearance of the to-be-tested object T is detected by a CCD camera or an image sensor (line sensor camera), illuminating the to-be-tested object T which is installed and conveyed with the light radiate | emitted from a light source (lamp).

자동외관검사 공정에서는 생산성 향상을 위해 피검사물 정제(T)를 반송하는 벨트컨베이어(66)의 이동속도를 대략 1m/초 정도나 그 이상의 속도로 하며, CCD 라인스캔 카메라의 주사 속도는, 피검사물 정제(T)의 이동속도 이상으로 검사할 필요가 있다.In the automatic visual inspection process, the moving speed of the belt conveyor 66 conveying the inspected object tablet T is about 1 m / sec or more for improving productivity, and the scanning speed of the CCD line scan camera is It is necessary to inspect above the moving speed of tablet T.

즉 반송장치 X1(33) ∼ X2(43)에 의해서 빠른 속도로 반송되는 피검사물 정제(T)를 CCD 카메라, 또는 이미지센서를 이용해 고정밀의 외관검사를 실시하기 위해서는 고휘도이면서 피검사물 정제(T)의 표면형상에 균질조명이 가능한 조명장치가 필요하다. 특히 라인센서 카메라를 이용해 고속 외관검사를 실시하는 경우, 주사 주기가 짧아져, 검사상 충분한 게인(gain)을 얻기 위해서는, 고휘도이면서 균질인 조명이 필요하다.That is, in order to perform high-precision external appearance inspection of the inspected object tablet T conveyed by the conveyance apparatus X1 (33)-X2 (43) using a CCD camera or an image sensor, the inspected object tablet (T) Lighting equipment capable of homogeneous illumination on the surface shape of the In particular, when a high-speed visual inspection is performed using a line sensor camera, the scanning cycle is shortened, and high brightness and homogeneous illumination are required in order to obtain sufficient gain in inspection.

그러나, 종래의 정제외관검사용 조명장치는 할로겐 램프와 같은 한 개의 투광부로 이루어진 것으로 한쪽 방향으로부터의 조명에서는 이미지 센서에 도달하는 같은 부위의 반사광량(방사광)이 적어 고속 외관검사에 필요한 광량을 얻을 수 없어서 사용상 불편한 문제점이 있다. 또한, 한 개의 투광부로 구성된 정제외관검사용 조명장치에서는 전체 자동외관검사 공정을 주사시간이 짧은 고속 촬상장치로 설 계하기가 어려워 생산성을 높이는 데 한계가 있다.However, the conventional illumination device for tablet vision inspection is composed of one light transmitting part such as a halogen lamp, and in the illumination from one direction, the amount of reflected light (radiation light) reaching the image sensor is small, so that the amount of light required for high-speed visual inspection is obtained. There is a problem inconvenient to use. In addition, in the illumination device for tablet appearance inspection composed of one light transmitting part, it is difficult to design the entire automatic appearance inspection process with a high-speed imaging device having a short scanning time, thereby limiting productivity.

본 발명은, 이상의 종래 기술의 문제점을 해결하기 위하여 안출한 것으로, 본 발명의 목적은 조명장치내로 반송된 정제를 촬상장치의 광축주위에 다수의 원환형상으로 배열된 다수의 백색LED광원으로 고휘도이며 균등한 광량의 조사로 균일하게 조명하여 고속 외관검사로 생산성을 높일 수 있는 정제외관검사용 조명장치를 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide a high luminance of a plurality of white LED light sources arranged in a plurality of annular shapes around an optical axis of an imaging device. The present invention provides a lighting device for tablet appearance inspection that can be uniformly illuminated with an equal amount of light to increase productivity by high-speed appearance inspection.

본 발명의 다른 목적은 빠른 속도로 반송되는 피검사물 정제 외관 촬상시에, 고속주사용 촬상장치에 필요한 광량을 제공할 수 있는 정제외관검사용 조명장치를 제공하는데 있다.Another object of the present invention is to provide an illumination device for tablet appearance inspection, which can provide the amount of light required for a high-speed injection imaging device at the time of tablet-like external appearance imaging of a specimen to be conveyed at a high speed.

본 발명의 또 다른 목적은 조명장치내 다수의 백색LED광원에서 발생되는 열을 외부로 방열할 수 있는 방열판을 갖는 정제외관검사용 조명장치를 제공하는데 있다.Still another object of the present invention is to provide a lighting device for tablet visual inspection having a heat sink capable of dissipating heat generated from a plurality of white LED light sources in the lighting device to the outside.

본 발명은 정부에 촬상용 개구부와 저부에 정제반송용 통과구를 갖는 금속제 돔형 조명장치에 있어서, 상기 조명장치내로 반송된 정제를 조명하기 위해 상기 정제를 촬상하는 광축주위에 원환형상으로 상기 조명장치의 내주면에 삽입한 백색LED광원과 상기 백색LED광원에서 발생하는 열을 외부로 방출하기 위하여 상기 조명장치의 외주면에 코팅한 열전도성 절연물질을 개재부로 하여 금속제 방열판을 조립장 착되는 것에 특징이 있다.The present invention relates to a metal dome-type lighting apparatus having an opening for image pickup and a passage for feeding tablets at a bottom thereof, wherein the lighting apparatus is annularly around an optical axis for imaging the tablet to illuminate the tablet conveyed into the lighting apparatus. It is characterized in that the metal heat sink is assembled by mounting the white LED light source inserted into the inner circumferential surface and the heat-conductive insulating material coated on the outer circumferential surface of the lighting device to the outside to emit heat generated from the white LED light source to the outside. .

본 발명은 조명장치 내주면에 촬상장치의 광축주위에 다수의 원환형상으로 배열된 다수의 백색LED광원으로 고속외관검사에 필요한 광량및 균질조명을 제공하여 정제외관검사장치의 생산성을높일 뿐만 아니라, 조명장치 외주면에 조립장착된 금속방열판에 의해 백색LED광원에서 발생되는 열이 외부로 방출되어 조명장치의 성능및 수명이 향상된다.The present invention provides a plurality of white LED light sources arranged in a plurality of annular shapes around the optical axis of the imaging device on the inner circumference of the lighting device to provide light quantity and homogeneous illumination required for high-speed visual inspection, as well as to increase the productivity of the tablet visual inspection device. The heat dissipated from the white LED light is released to the outside by the metal heat dissipation plate assembled on the outer circumference of the device, thereby improving the performance and life of the lighting device.

본 발명을 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 조명장치 부분절단 사시도이고, 도 2는 본 발명의 실시예에 따른 조명장치 부분절단 정면도이며, 도 3는 본 발명의 실시예에 따른 조명장치 부분절단 평면도이며. 도 4는 본 발명의 실시예에 따른 조명장치 부분절단 측면도이며, 도 5는 본 발명의 실시예에 따른 조명장치 분해정면도이다.1 is a perspective view of a partially cut lighting device according to an embodiment of the present invention, Figure 2 is a front view of a partially cut lighting device according to an embodiment of the present invention, Figure 3 is a plan view of a partially cut lighting device according to an embodiment of the present invention. . 4 is a side view of the lighting device according to an embodiment of the present invention, Figure 5 is an exploded front view of the lighting device according to an embodiment of the present invention.

도1 내지 도5에 도시된 바와 같이 본 발명은 조명장치(10)가 구비된다.1 to 5, the present invention is provided with a lighting device 10.

조명장치(10)위에는 촬상장치(15)가 위치하며, 조명장치(10' )의 외주면에는 방열판(14)이 조립장착되며, 그리고 반송장치(25)의 컨베이어(29)로 반송된 정제(T)는 돔형 조명장치의 체적 디멘젼(VOLUME DIMENSION))내로 들어가도록 배치된다.The imaging device 15 is positioned on the lighting device 10, and the heat sink 14 is assembled and mounted on the outer circumferential surface of the lighting device 10 ′, and the tablet T transferred to the conveyor 29 of the transportation device 25 (T). ) Is arranged to enter into the volume dimension of the dome shaped lighting device.

정제(T)를 반송하는 반송장치(25), 조명장치(10) 저부의 통과구(13)를 거쳐 조명장치(10)내로 반송된 정제(T)를 촬상장치(15)의 광축(도시하지 않음)주위에 다수의 원환형상(도시하지 않음)으로 배열된 백색LED광원(12)에서 출사하는 고휘도, 균등한 광량으로 조명하여 정제(T)외관 표면의 방사광(도시하지 않음)을 촬상하는 고속주사용 촬상장치(15)등이 도시되어 있다.The optical axis (not shown) of the imaging device 15 shows the tablet T conveyed into the lighting device 10 through the conveying device 25 for conveying the tablet T and the passage 13 of the bottom of the lighting device 10. High speed imaging of the radiated light (not shown) on the outer surface of the tablet T by illuminating with high luminance and an equal amount of light emitted from the white LED light source 12 arranged in a plurality of annular shapes (not shown) around A scanning imaging device 15 and the like are shown.

촬상장치(15)는 조명장치(10) 정부의 검사용 구멍인 개구부(11)로 노출된 정제(T)를 촬상한다. 조명장치(10')는 알루미늄 금속제 돔형으로 조명장치(10')의 내면을 난반사가 잘 이루어지게끔 가공한다. 난반사가 잘 되게 돔형 조명장치(10')의 내부표면을 금속 표면 가공하여 돔형 조명장치(10') 내주면의 다수의 홀(HOLE, 도시하지 않음)에 삽입된 백색LED광원(12)으로 돔형 조명장치내로 반송된 정제(T)에 대하여 균질 조명을 할 수 있다. 조명장치(10') 주면의 다수의 홀에 삽입된 백색LED광원(12)은 LED출력축(도시하지 않음)을 조명장치(10)내로 반송된 정제(T)의 표면을 향하게 하거나, 또는 난반사가 잘 일어나게 기계가공된 돔형 조명장치(10') 내주면을 향하게 수납배치된다.The imaging device 15 captures an image of the tablet T exposed through the opening 11, which is an inspection hole of the illumination device 10. The lighting apparatus 10 'is an aluminum metal dome, and processes the inner surface of the lighting apparatus 10' to be diffused well. Dome type illumination by white LED light source 12 inserted into a plurality of holes (HOLE, not shown) on the inner circumferential surface of the dome type lighting device 10 'by processing the inner surface of the dome type lighting device 10' for good reflection. Homogeneous illumination can be performed with respect to the tablet T conveyed in the apparatus. The white LED light source 12 inserted into a plurality of holes on the main surface of the lighting device 10 'directs the LED output shaft (not shown) to the surface of the tablet T conveyed into the lighting device 10, or diffuse reflection The dome-shaped illumination device 10 'which is machined to stand up is disposed to face the inner circumferential surface.

또한 조명장치(10) 저부의 서로 대면하고 있는 한쌍의 통과구 (13)를 제외한 저부 내면의 홀에 삽입된 백색LED광원(12)은 LED출력축을 조명장치(10)내로 반송된 정제(T)에 대하여 간접조명을 할 수 있게 수납배치된다. 통과구(13)의 디멘션(DIMENSION)은 정제(T)를 흡착반송하는 컨베이어(29)의 폭, 높이, 그리고 정제(T)의 크기(높이) 등의 변수(VARIABLES)를 고려하여 결정한다.In addition, the white LED light source 12 inserted into the bottom inner hole except for the pair of passages 13 facing each other in the bottom of the lighting device 10 has a tablet T which is returned to the lighting device 10 by the LED output shaft. It is arranged to receive indirect lighting. The dimension (DIMENSION) of the passage opening 13 is determined in consideration of variables such as the width, height of the conveyor 29 for adsorption and transport of the tablet (T), and the size (height) of the tablet (T).

상기 변수를 고려하여 설계된 조명장치(10) 저부에는 대략 3열의 원환형상(12a1, 12a2, ,,,,, 12an)으로 배열된 다수의 백색LED광원(12)으로 조명장치(10)내로 반송된 정제(T)에 대하여 간접조명을 할 수 있게 수납배치된다. 이때 정제(T)의 위치좌표(x1,y1) 의 높이 위치 y1는 적어도 조명장치(10) 저부의 위치좌표(x2,y2) 의 높이 위치 y2보다는 크다.The bottom of the lighting device 10 designed in consideration of the above parameters is conveyed into the lighting device 10 by a plurality of white LED light sources 12 arranged in approximately three rows of annular shapes 12a1, 12a2,. The tablet T is placed so as to allow indirect illumination. At this time, the height position y1 of the position coordinates x1 and y1 of the tablet T is at least larger than the height position y2 of the position coordinates x2 and y2 of the bottom of the lighting apparatus 10.

정제(T)를 촬상하는 광축주위에 다수 (복수열) 의 원환형상(12a1, 12a2, ,,,,, 12an)으로 조명장치(10')의 내주면에 빽빽한 간격으로 홀(12a1, 12a2, ,,,,, 12an)에 삽입한 수백개 백색LED광원(12a1, 12a2, ,,,,, 12an)에서 발생하는 열을 외부(대기,AIR)로 방출하기 위하여 조명장치(10')의 외주면에 노출된 수백개의 백색LED광원(12a1, 12a2, ,,,,, 12an)들의 접속 연결선(WIRES)을 무기계 실리콘고무등의 열전도성이 높은 절연물질로 코팅한 후 열전도성이 높은 알루미늄 금속을 가공하여 넓은 표면적을 갖는 금속제 방열판(14)을 조립장착한다. 이 조립장착된 금속제 방열판(14)으로 백색LED광원(12a1, 12a2, ,,,,, 12an)에서 발생하는 열을 외부로 방출하여 백색LED광원(12a1, 12a2, ,,,,, 12an)의 열화와 같은 데미지(DAMAGES)를 최소화하여 조명장치(10)의 성능을 향상한다. 본 발명의 1종류의 백색LED광원을 사용한 조명장치는 R, G, B 같이 복수종류의 LED광원을 사용한 조명장치에서 생기는 색 얼룩 같은 문제가 일어나지 않아 고정밀 화상처리를 요하는 촬상장치에 유리하다.Holes 12a1, 12a2, ... at intervals close to the inner circumferential surface of the lighting device 10 'in a plurality of (plural rows) annular shapes 12a1, 12a2, ...,, 12an around the optical axis for imaging the tablet T. On the outer circumferential surface of the lighting device 10 'to emit heat generated from hundreds of white LED light sources 12a1, 12a2, ,,,, 12an inserted into 12an to the outside (air). The connection wires (WIRES) of hundreds of white LED light sources 12a1, 12a2, ,,,, and 12an exposed are coated with a thermally conductive insulating material such as inorganic silicone rubber, and processed with high thermally conductive aluminum metal. A metal heat sink 14 having a large surface area is assembled. The heat dissipation plate 14 of the assembled metal is radiated to the outside by emitting heat generated from the white LED light sources 12a1, 12a2, ..., 12an to the outside of the white LED light sources 12a1, 12a2, ..., 12an. By minimizing damage such as deterioration (DAMAGES) to improve the performance of the lighting device (10). The illumination device using one type of white LED light source of the present invention is advantageous for an imaging device requiring high-precision image processing without causing problems such as color unevenness caused by illumination devices using a plurality of types of LED light sources such as R, G, and B.

도 6은 본 발명의 실시예에 따른 정제외관검사용 조명장치의 배면도이며,6 is a rear view of the lighting apparatus for tablet appearance inspection according to an embodiment of the present invention,

도7은 백색LED 광원을 10개 직렬 접속한 것을 병렬로 접속한 회로를 나타내는 회로도 단면도이다.Fig. 7 is a circuit sectional view showing a circuit in which ten white LED light sources are connected in series.

도6 내지 도7에 도시된 바와 같이 본 발명은 조명장치(10)내의 다수의 백색LED광원(12a1, 12a2, ,,,,, 12an)을 100개의 백색LED광원(12a1, 12a2, ,,,,, 12a99, 12a100)을 한 단으로 하며, 이 경우 구성되는 회로도는 10개의 백색LED 광 원을 직렬 접속한 10개(12a1, 12a2, ,,,,, 12a10)를 복수개의 병렬로 접속된다. 이때 회로도의 직렬 접속되는 백색LED광원의 개수는 조명컨트롤러(도시하지 않음)의 출력전압의 크기에 의해 결정된다. 조명장치(10')의 내주면에 다수(복수열)의 원환형상(12a1, 12a2, ,,,,, 12an)으로 배열된 한 단( 100개의 백색LED광원 )의 백색LED 부하(LOAD)를 조광하기 위해 조명장치(10) 외부의 출력 전압 25V 인 조명컨트롤러(도시하지 않음)에 접속되는 백색LED(12)는 순방향전압 2.4V, 순방향전류 20mA 정도의 고휘도 백색LED 10개(12a1, 12a2, ,,,,, 12a10)를 직렬로 접속한 유닛을 10대(臺) 병렬로 접속한다. 조명장치(10')의 내주면에는 4단(400개의 백색LED광원)의 백색LED 광원(12a1, 12a2, ,,,,, 12an))이 배열되어 조명장치(10)내로 반송된 정제(T)를 연속적으로 고휘도이며 균등한 광량의 조사로 조명한다.As shown in Figs. 6 to 7, the present invention uses a plurality of white LED light sources 12a1, 12a2, ..., 12an in the lighting device 10 to 100 white LED light sources 12a1, 12a2, ..., 12a99 and 12a100 are provided in a single stage, and in this case, the circuit diagram constituted is connected to a plurality of 12 (12a1, 12a2, ..., 12a10) connected in series with 10 white LED light sources in parallel. The number of white LED light sources connected in series in the circuit diagram is determined by the magnitude of the output voltage of the lighting controller (not shown). The white LED load of one stage (100 white LED light sources) arranged in a plurality of (plural rows) annular shapes 12a1, 12a2, ,,,, 12an on the inner circumferential surface of the lighting device 10 'is illuminated. The white LED 12 connected to an illumination controller (not shown) having an output voltage of 25V outside the lighting device 10 includes 10 high-brightness white LEDs having a forward voltage of 2.4V and a forward current of 20 mA (12a1, 12a2,,). 10 units connected in series with 12a10 are connected in parallel. On the inner circumferential surface of the lighting device 10 ', four stages (400 white LED light sources) of white LED light sources 12a1, 12a2, ..., 12an) are arranged and the tablets T returned to the lighting device 10. Illuminate continuously with irradiation of high brightness and equal amount of light.

도 1은 본 발명의 실시예에 따른 조명장치의 부분절단 사시도이다.1 is a partially cutaway perspective view of a lighting apparatus according to an embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 조명장치의 정면도이다.2 is a front view of the lighting apparatus according to the embodiment of the present invention.

도 3는 본 발명의 실시예에 따른 조명장치의 평면도이다.3 is a plan view of a lighting apparatus according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 조명장치의 측면도이다.4 is a side view of the lighting apparatus according to the embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 조명장치의 분해정면도이다.5 is an exploded front view of the lighting apparatus according to the embodiment of the present invention.

도 6은 본 발명의 실시예에 따른 정제외관검사용 조명장치의 배면도이다.6 is a rear view of the lighting apparatus for tablet appearance inspection according to an embodiment of the present invention.

도7은 백색LED광원을 10개 직렬 접속한 것을 병렬로 접속한 회로를 나타내는 회로도 단면도이다.Fig. 7 is a circuit sectional view showing a circuit in which ten white LED light sources are connected in series.

도8은 정제외관검사장치의 정면도이다.8 is a front view of a tablet visual inspection apparatus.

Claims (3)

정부에 촬상용 개구부를 갖는 돔형 조명장치에 있어서,In the domed lighting device having an opening for imaging in the government, 정제반송용 벨트컨베이어가 통과할 수 있게 상기 조명장치의 저부에 서로 대면 배치된 한쌍의 구멍으로 형성되는 정제반송용 통과구와 상기 통과구를 거쳐 상기 조명장치내로 반송된 정제를 조명하기 위해 상기 정제를 촬상하는 광축주위에 원환형상으로 상기 조명장치의 내주면에 직렬 접속한 유닛을 복수개의 병렬로 접속되는 회로로 형성되는 백색LED광원을 배열하며 상기 백색LED광원에서 발생하는 열을 외부로 방출하기 위하여 상기 조명장치의 외주면에 코팅한 열전도성 절연물질을 개재부로 하여 금속제 방열판으로 이루어지는 것을 특징으로 하는 정제외관검사용 조명장치.The tablet conveying passage is formed by a pair of holes disposed facing each other at the bottom of the lighting device so that the tablet conveying belt conveyor can pass through and the tablet conveyed into the lighting device via the passage opening. Arrange a white LED light source formed by a circuit connected in parallel to a unit connected in series in an annular shape to the inner peripheral surface of the illumination device around the optical axis for imaging and to emit heat generated from the white LED light source to the outside A lighting device for tablet appearance inspection, comprising a heat sink made of metal with a heat conductive insulating material coated on an outer circumferential surface of the lighting device as an intervening portion. 제 1항에 있어서,The method of claim 1, 상기 유닛을 10대 병렬로 접속한 것을 한 단으로 하며 적어도 4 단이상이 상기 조명장치의 내주면에 삽입 배열되는 것을 특징으로 하는 정제외관검사용 조명장치.10 units in parallel, wherein at least four stages are inserted into the inner circumferential surface of the lighting apparatus. 삭제delete
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920000207A (en) * 1990-02-23 1992-01-10 원본미기재 Printed Circuit Board (PCB) Inspection Device and Method
JP2003287503A (en) * 2002-03-27 2003-10-10 Sumitomo Pharmaceut Co Ltd Method of controlling quality of granular substance and foreign matter sample used therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920000207A (en) * 1990-02-23 1992-01-10 원본미기재 Printed Circuit Board (PCB) Inspection Device and Method
JP2003287503A (en) * 2002-03-27 2003-10-10 Sumitomo Pharmaceut Co Ltd Method of controlling quality of granular substance and foreign matter sample used therefor

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