KR970047903A - Apparatus and method for measuring external dimensions of objects using laser light - Google Patents

Apparatus and method for measuring external dimensions of objects using laser light Download PDF

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Publication number
KR970047903A
KR970047903A KR1019950061660A KR19950061660A KR970047903A KR 970047903 A KR970047903 A KR 970047903A KR 1019950061660 A KR1019950061660 A KR 1019950061660A KR 19950061660 A KR19950061660 A KR 19950061660A KR 970047903 A KR970047903 A KR 970047903A
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KR
South Korea
Prior art keywords
light
ccd camera
dimension
measuring
pixel
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KR1019950061660A
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Korean (ko)
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KR0181993B1 (en
Inventor
하문수
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김광호
삼성전자 주식회사
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Priority to KR1019950061660A priority Critical patent/KR0181993B1/en
Publication of KR970047903A publication Critical patent/KR970047903A/en
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Publication of KR0181993B1 publication Critical patent/KR0181993B1/en

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    • 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
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré

Abstract

본 발명은 레이저광을 이용한 물체의 외관치수측정장치 및 외관치수측정방법에 관한 것으로서, 측정 대상물체에 빛을 투사하는 광원과, 상기 물체에 투사된 후의 상기 광원으로부터의 빛을 수령하여, 명도를 픽셀단위로 수치화하는 CCD카메라와; 상기 CCD카메라로부터의 수치화된 데이타에 의해 물체의 외관치수를 판별하는 판별부를 갖는 외관치수측정장치에 있어서, 상기 광원으로부터의 빛은, 레이저광으로 구성된 것을 특징으로 하는 외관치수측정장치 및 측정대상 물체에 레이저광을 투사하는 단계와; 상기 물체를 통과한 후의 상기 레이저광을 CCD카메라로 수령하는 단계와, 상기 수령된 레이저광을 명도에 따라 CCD카메라의 픽셀단위로 수치화하는 단계와; 상기 수치화된 픽셀단위의 데이타에 따라 물체의 외관치수를 판별하는 단계를 포함하는 물체의 외관치수측정방법이다. 이에 의해, 측정대상 물체와 CCD카메라 사이의 거리, 측정대상 물체의 크기, 빛의 회절 및 외부로부터 유입되는 빛의 영향 등에 의한 오차가 없이 정밀한 측정이 가능하며, 특히 물체의 경계를 정확히 판별할 수 있고, 레이저광의 폭보다 큰 물체의 외관치수를 측정할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the external dimension of an object and a method for measuring the external dimension using a laser beam, the method comprising: receiving a light source for projecting light onto an object to be measured and light from the light source after being projected onto the object, A CCD camera digitizing in pixel units; An appearance dimension measuring apparatus having a discriminating unit for discriminating an appearance dimension of an object by digitized data from the CCD camera, wherein the light from the light source is comprised of a laser beam and an object to be measured Projecting laser light onto the target; Receiving the laser light after passing through the object to a CCD camera, and digitizing the received laser light in pixel units of the CCD camera according to brightness; A method of measuring an appearance dimension of an object including determining an appearance dimension of the object according to the digitized pixel data. This enables precise measurement without errors due to the distance between the measuring object and the CCD camera, the size of the measuring object, the diffraction of light, and the influence of light from the outside. In particular, the boundary of the object can be accurately determined. And the external dimension of the object larger than the width of the laser beam can be measured.

Description

레이저광을 이용한 물체의 외관치수측정장치 및 외관치수측정방법Apparatus and method for measuring external dimensions of objects using laser light

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 외관치수측정장치의 평면도.1 is a plan view of the appearance dimension measuring apparatus according to the present invention.

제2도는 측정 대상 물체에 레이저광을 투사한 상태의 부분사시도.2 is a partial perspective view of the state in which the laser light is projected on the measurement object.

제3도는 측정 대상 물체를 통과한 후의 레이저광을 수령하여 CCD카메라 상의 셀단위로 명암을 표시한 상태의 도면.FIG. 3 is a view of the state in which the intensity of light on the CCD camera is displayed by receiving the laser beam after passing through the object to be measured.

제4도는 레이저광의 폭보다 큰 물체를 측정하는 상태의 외관치수측정장치의 측면도.4 is a side view of an external appearance measuring device in a state of measuring an object larger than the width of the laser light.

제5도는 종래의 외관치수측정장치의 평면도.5 is a plan view of a conventional external appearance measurement device.

Claims (6)

측정 대상 물체에 빛을 투사하는 광원과; 상기 물체에 투사된 후의 상기 광원으로부터의 빛을 수령하여, 명도를 픽셀단위로 수치화하는 CCD카메라와; 상기 CCD카메라로부터의 수치화된 데이타에 의해 물체의 외관치수를 판별하는 판별부를 갖는 외관치수측정장치에 있어서, 상기 광원으로부터의 빛은, 레이저광으로 구성된 것을 특징으로 하는 외관치수측정장치.A light source for projecting light onto the measurement object; A CCD camera which receives light from the light source after being projected onto the object and digitizes the brightness in units of pixels; An appearance dimension measuring apparatus having a discriminating unit for discriminating an appearance dimension of an object by digitized data from the CCD camera, wherein the light from the light source is composed of laser light. 제1항에 있어서, 상기 판별부는, 상기 CCD카메라의 픽셀간의 데이타의 변화율이 소정크기 이상인 픽셀을 픽셀간의 경게로 판별하여, 물체의 외관치수를 판별하는 것을 특징으로 하는 외관치수측정장치.The appearance dimension measurement apparatus of claim 1, wherein the determination unit determines an appearance dimension of an object by determining a pixel having a change rate of data between pixels of the CCD camera equal to or greater than a predetermined size as a pixel-to-pixel hardness. 물체의 외관치수측정방법에 있어서, 측정대상 물체에 레이저광을 투사하는 단계와; 상기 물체를 통과한 후의 상기 레이저광을 CCD카메라로 수령하는 단계와; 상기 수령된 레이저광을 명도에 따라 CCD카메라의 픽셀단위로 수치화하는 단계와; 상기 수치화된 픽셀단위의 데이타에 따라 물체의 외관치수를 판별하는 단계를 포함하는 것을 특징으로 하는 물체의 외관치수측정방법.A method of measuring the external dimension of an object, the method comprising: projecting a laser beam onto an object to be measured; Receiving the laser light after passing through the object to a CCD camera; Digitizing the received laser light in pixel units of a CCD camera according to brightness; And determining the external dimension of the object according to the digitized data of the pixel unit. 제3항에 있어서, 상기 외관치수판별단계는, 상기 픽셀간의 데이타의 변화율이 소정크기 이상인 픽셀을 픽셀간의 경계로 판별하여 물체의 외관치수를 판별하는 것을 특징으로 하는 물체의 외관치수측정방법.4. The method of claim 3, wherein in the external dimension discrimination step, the external dimension of the object is determined by discriminating pixels having a rate of change of data between the pixels greater than or equal to a predetermined size as a boundary between pixels. 물체의 외관치수측정방법에 있어서, 측정대상 물체의 일단부의 위치를 기준점으로 취하는 단계와; 상기 물체의 타단부에 레이저광을 투사하는 단계와; 상기 물체를 통과한 후의 상기 레이저광을 CCD카메라로 수령하는 단계와; 상기 수령된 레이저광을 명도에 따라 CCD카메라의 픽셀단위로 수치화하는 단계와; 상기 수직화된 픽셀단위의 데이타에 따라 상기 물체의 타단부의 위치를 판별하는 단계와; 상기 기준점의 위치와 상기 판별된 타단부의 위치 사이의 거리에 따라 상기 물체의 외관치수를 판별하는 단계를 포함하는 것을 특징으로 하는 물체의 외관치수측정방법.A method of measuring the external dimension of an object, the method comprising: taking a position of one end of an object to be measured as a reference point; Projecting a laser beam at the other end of the object; Receiving the laser light after passing through the object to a CCD camera; Digitizing the received laser light in pixel units of a CCD camera according to brightness; Determining a position of the other end of the object according to the data in the vertical pixel unit; And determining the external dimension of the object according to the distance between the position of the reference point and the determined position of the other end portion. 제5항에 있어서, 상기 타단부의 위치를 판별하는 단계는, 상기 픽셀간의 데이타의 변화율이 소정크기 이상인 픽셀을 픽셀간의 경계로 판별하여 상기 타단부의 위치를 판별하는 것을 특징으로 하는 물체의 외관치수 측정방법.The method of claim 5, wherein the determining of the position of the other end comprises: determining the position of the other end by determining a pixel having a rate of change of data between the pixels greater than or equal to a predetermined size as a boundary between pixels. How to measure dimensions. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950061660A 1995-12-28 1995-12-28 Apparatus and method for measuring visual size of material KR0181993B1 (en)

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