KR870009229A - 초음파를 이용한 보일러관의 비파괴 검사방법 - Google Patents

초음파를 이용한 보일러관의 비파괴 검사방법 Download PDF

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Publication number
KR870009229A
KR870009229A KR870002695A KR870002695A KR870009229A KR 870009229 A KR870009229 A KR 870009229A KR 870002695 A KR870002695 A KR 870002695A KR 870002695 A KR870002695 A KR 870002695A KR 870009229 A KR870009229 A KR 870009229A
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South Korea
Prior art keywords
time
ultrasonic
scale
thickness
boiler tube
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KR870002695A
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English (en)
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KR960013685B1 (ko
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로버트 레스터 사무엘
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로버트 제이. 에드워즈
더 뱁콕 앤드 윌콕스 컴퍼니
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Publication of KR870009229A publication Critical patent/KR870009229A/ko
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Publication of KR960013685B1 publication Critical patent/KR960013685B1/ko

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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
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G01B17/025—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness for measuring thickness of coating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/025—Change of phase or condition
    • G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02854—Length, thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02881—Temperature

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

내용 없음

Description

초음파를 이용한 보일러관의 비파괴 검사방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 측정장치의 블록다이어그램
제2도는 결함이 생긴 보일러관에서 반사된 초음파펄스의 파형도
제3도는 산화물스케일의 실재두께와 스케일내에서의 초음파신호 진행시간과의 연관관계를 나타낸 그래프이다.
* 도면의 주요 부분에 대한 부호의 설명

Claims (4)

  1. 보일러 내부에서 유체를 통과시키는 보일러관의 내벽에 고착된 산화물스케일의 두께를 초음파탐상방식으로 측정함에 있어서, 스케일 내부에서 통과흔 초음파펄스의 진행시간에 따라 산화물스케일의 두께를 비교결정하는데 척도가 되는 기준표를 산출하는 과정과 보일러관내로 초음파 펄스를 전송시키기 위해 초음파빔의 중심선이 보일러간의 내벽에 수직되도록 초음파변환기를 보일러관의 외표면에 지향되게 설치하는 과정, 보일러관내에 최소한 50㎒ 이상의 주파수를 갖는 초음파 펄스를 전송시키기 위해 변환기에 고주파전압을 걸어주는 과정, 초음파펄스가 관과 스케일간의 경계면까지 정송되었다가 반사되어 되돌아올때까지의 진행시간(TOF1)을 측정하는 과정, 제2진행시간(TOF2)과 제1진행시간(TOF1)사이의 시차를 결정해서 이 시차를 스케일의 두께를 각각 결정하는데 척도가 되는 기준표와 비교하는 과정으로 이루어지면서, 상기 기준표는 스케일의 두께가 각각다른 다수개의 샘플용 보일러관에서 일차적으로 초음파펄스의 진행시간을 측정한 다음 물리적 또는 야금방식에 의해 실제의 스케일 두께를 측정하여 펄스진행시간과 스케일 두께와의 상관관계를 나타낸 것으로 된 것을 특징으로 하는 초음파를 이용한 보일러관의 비파괴검사방법.
  2. 제1항에 있어서, 파지부착방식의 변환기는 보일러관의 외표면에 인위적으로 부착하도록 된 것을 특징으로 하는 초음파를 이용한 보일러관의 비파괴검사방법.
  3. 제1항에 있어서, 기준표는 스케일두께와 제2진행시간(TOF2) 및 제1진행시간(TOF1) 사이의 시차에 관련된 공식에 의하여 산출하도록 된 것을 특징으로 하는 초음파를 이용한 보일러관의 비파괴검사방법.
  4. 제1항에 있어서, 기준표는 스케일의 두께와 제2진행시간(TOF2) 및 제1진행시간(TOF1)사이의 시차에 관련된 연관곡선에 의하여 산출하도록 된 것을 특징으로 하는 초음파를 이용한 보일러판의 비파괴검사방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870002695A 1986-03-26 1987-03-24 초음파를 이용한 보일러관의 비파괴 검사방법 KR960013685B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/844,399 US4669310A (en) 1986-03-26 1986-03-26 High frequency ultrasonic technique for measuring oxide scale on the inner surface of boiler tubes
US06/844399 1986-03-26

Publications (2)

Publication Number Publication Date
KR870009229A true KR870009229A (ko) 1987-10-24
KR960013685B1 KR960013685B1 (ko) 1996-10-10

Family

ID=25292626

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870002695A KR960013685B1 (ko) 1986-03-26 1987-03-24 초음파를 이용한 보일러관의 비파괴 검사방법

Country Status (10)

Country Link
US (1) US4669310A (ko)
EP (1) EP0239275B1 (ko)
JP (1) JPS62284209A (ko)
KR (1) KR960013685B1 (ko)
BR (1) BR8701985A (ko)
CA (1) CA1267213A (ko)
DE (1) DE3781296T2 (ko)
ES (1) ES2033828T3 (ko)
IL (1) IL81794A0 (ko)
MX (1) MX165126B (ko)

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KR100497501B1 (ko) * 2002-11-29 2005-07-01 (주)오리엔트전산 초음파를 이용한 자동차 엔진용 피스톤 갤러리의 결함탐지방법 및 이에 사용되는 결함탐지 장치

Also Published As

Publication number Publication date
CA1267213A (en) 1990-03-27
EP0239275B1 (en) 1992-08-26
JPS62284209A (ja) 1987-12-10
EP0239275A2 (en) 1987-09-30
MX165126B (es) 1992-10-28
KR960013685B1 (ko) 1996-10-10
EP0239275A3 (en) 1988-03-30
US4669310A (en) 1987-06-02
ES2033828T3 (es) 1993-04-01
IL81794A0 (en) 1987-10-20
DE3781296D1 (de) 1992-10-01
DE3781296T2 (de) 1993-02-25
BR8701985A (pt) 1988-01-12

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