KR101595707B1 - 펄스 적외선 열화상 기법을 이용한 박판의 결함깊이 측정방법 - Google Patents
펄스 적외선 열화상 기법을 이용한 박판의 결함깊이 측정방법 Download PDFInfo
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- KR101595707B1 KR101595707B1 KR1020150140873A KR20150140873A KR101595707B1 KR 101595707 B1 KR101595707 B1 KR 101595707B1 KR 1020150140873 A KR1020150140873 A KR 1020150140873A KR 20150140873 A KR20150140873 A KR 20150140873A KR 101595707 B1 KR101595707 B1 KR 101595707B1
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- thin plate
- defect
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- 230000007547 defect Effects 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001931 thermography Methods 0.000 title description 2
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 19
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000002950 deficient Effects 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 230000006866 deterioration Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000003331 infrared imaging Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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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
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10048—Infrared image
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- Life Sciences & Earth Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Quality & Reliability (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
도 2는 본 발명에 의한 펄스 적외선 열화상 기법을 이용한 박판의 결함길이 측정장치를 블록으로 보인 도.
도 3은 본 발명에 의한 펄스 적외선 열화상 기법을 이용한 박판의 결함길이 측정방법에 사용되는 박판시편의 일예를 보인 도.
도 4a 내지 도 4b는 본 발명에 의한 펄스 적외선 열화상 기법을 이용한 박판의 결함길이 측정방법으로 측정한 결함의 깊이를 보인 그래프와 표.
30: 파워 서플라이 40: 트리거
50: 제어부 51: 변환부
52: 표시부 53: 분석부
54: 연산부 S: 박판시편
Claims (5)
- 뒷면에 결함이 있는 박판시편(S)의 전면을 암실에서 제논램프(10)로 가열하는 단계와; 상기 제논램프(10)로 가열되는 박판시편(S)의 전면을 암실에서 적외선 카메라(20)로 촬영하는 단계와; 제어부(50)가 상기 적외선 카메라(20)에서 촬영한 영상을 전송받아 상기 박판시편(S) 표면에 대한 콘트라스트(Contrast, 명암도) 값을 구한 후, 이 콘트라스트 값을 이용하여 결함의 깊이를 연산하는 단계;를 포함하여 구성되되,
상기 결함의 깊이는 하기의 [식]을 통해 구하는 것을 특징으로 하는 펄스 적외선 열화상 기법을 이용한 박판의 결함깊이 측정방법.
[식]
d: 결함의 깊이
k : 박판의 두께에 따라 변하는 상수
(박판의 두께가 1mm일 때 0.1, 2mm일 때 0.2, 3mm일 때 0.28)
D : 결함의 직경
C : 콘트라스트 값
α : 박판의 열전도도
- 청구항 1에 있어서,
상기 제어부(50)는 상기 적외선 카메라(20)에서 촬영한 영상을 전송받아 적외선 열화상(Thermal Image)으로 변환하고, 상기 적외선 열화상에서 각각 측정된 결함 부분과 비결함 부분의 가열 전후 박판시편(S)의 표면온도를 통해 콘트라스트 값을 구한 후, 상기 콘트라스트 값을 이용하여 결함의 깊이를 연산하는 것을 특징으로 하는 펄스 적외선 열화상 기법을 이용한 박판의 결함깊이 측정방법.
- 삭제
- 삭제
- 삭제
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KR1020150140873A KR101595707B1 (ko) | 2015-10-07 | 2015-10-07 | 펄스 적외선 열화상 기법을 이용한 박판의 결함깊이 측정방법 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107976151A (zh) * | 2017-12-27 | 2018-05-01 | 天津中净能源工程股份有限公司 | 一种地源热泵地理井实际埋深自动检测仪 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000014105A (ko) * | 1998-08-17 | 2000-03-06 | 윤종용 | 인-라인 멀티구성 포토설비 |
JP2003344330A (ja) * | 2002-05-28 | 2003-12-03 | Matsushita Electric Works Ltd | 内部空間を有する板材の形状欠陥検査方法及び装置 |
JP2005283548A (ja) * | 2004-03-31 | 2005-10-13 | Takahide Sakagami | 欠陥検査方法およびその装置 |
KR20090009465A (ko) | 2007-07-20 | 2009-01-23 | 기아자동차주식회사 | 스마트 유리를 이용한 엘이디 램프 배광 제어 장치 및 방법 |
JP2009522544A (ja) * | 2005-12-30 | 2009-06-11 | ペラン・セレクテイブ・テクノロジーズ(ソシエテ・アノニム) | 厚さに基づいて物体を検査しかつ分類するための自動方法および機械 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000014105A (ko) * | 1998-08-17 | 2000-03-06 | 윤종용 | 인-라인 멀티구성 포토설비 |
JP2003344330A (ja) * | 2002-05-28 | 2003-12-03 | Matsushita Electric Works Ltd | 内部空間を有する板材の形状欠陥検査方法及び装置 |
JP2005283548A (ja) * | 2004-03-31 | 2005-10-13 | Takahide Sakagami | 欠陥検査方法およびその装置 |
JP2009522544A (ja) * | 2005-12-30 | 2009-06-11 | ペラン・セレクテイブ・テクノロジーズ(ソシエテ・アノニム) | 厚さに基づいて物体を検査しかつ分類するための自動方法および機械 |
KR20090009465A (ko) | 2007-07-20 | 2009-01-23 | 기아자동차주식회사 | 스마트 유리를 이용한 엘이디 램프 배광 제어 장치 및 방법 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107976151A (zh) * | 2017-12-27 | 2018-05-01 | 天津中净能源工程股份有限公司 | 一种地源热泵地理井实际埋深自动检测仪 |
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