KR100692391B1 - 역대칭 자기장 구조를 이용하여 봉부재에서 굽힘 진동을 발생 및 측정할 수 있는 전자기 음향 변환기 - Google Patents
역대칭 자기장 구조를 이용하여 봉부재에서 굽힘 진동을 발생 및 측정할 수 있는 전자기 음향 변환기 Download PDFInfo
- Publication number
- KR100692391B1 KR100692391B1 KR1020050017668A KR20050017668A KR100692391B1 KR 100692391 B1 KR100692391 B1 KR 100692391B1 KR 1020050017668 A KR1020050017668 A KR 1020050017668A KR 20050017668 A KR20050017668 A KR 20050017668A KR 100692391 B1 KR100692391 B1 KR 100692391B1
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic field
- rod member
- acoustic transducer
- bending vibration
- magnets
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
-
- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
Claims (4)
- 비금속으로 만들어지고 중공부가 형성된 본체;상기 본체에 배치되어, 상기 본체의 중공부를 관통하도록 설치된 봉부재의 양측에 그 길이 방향과 나란하고 방향이 서로 반대인 두 개의 자기장을 형성하는 자기장 형성부;상기 본체의 둘레에 감기는 코일을 포함하는 코일부; 및상기 코일부의 양측에 위치하고 서로 연결되어 상기 코일부에 대해 동일한 각도로 회전 가능하게 결합된 회전부를 포함하는 것을 특징으로 하는 전자기 음향 변환기.
- 제 1 항에 있어서,상기 자기장 형성부는,상기 본체의 일측에 소정 간격으로 이격되어 배치되는 두 개의 자석과,상기 봉부재에 대해 상기 두 개의 자석과 대칭되는 위치에 배치되어 상기 두 개의 자석이 형성하는 자기장의 방향과 반대 방향으로 자기장을 형성하는 또 다른 두 개의 자석을 포함하는 것을 특징으로 하는 전자기 음향 변환기.
- 삭제
- 제 1 항에 있어서,상기 회전부에는 자기장 형성부가 설치된 것을 특징으로 하는 전자기 음향 변환기.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050017668A KR100692391B1 (ko) | 2005-03-03 | 2005-03-03 | 역대칭 자기장 구조를 이용하여 봉부재에서 굽힘 진동을 발생 및 측정할 수 있는 전자기 음향 변환기 |
US11/287,370 US7742616B2 (en) | 2005-03-03 | 2005-11-28 | Electromagnetic acoustic transducer for generating and measuring bending vibration in rod member using anti-symmetric magnetic field structure |
JP2005375932A JP4414962B2 (ja) | 2005-03-03 | 2005-12-27 | 逆対称磁場構造を用いて棒部材で曲げ振動を発生及び測定する電磁気音響変換器 |
EP05258122A EP1698892A3 (en) | 2005-03-03 | 2005-12-30 | Electromagnetic acoustic transducer and method for generating or measuring bending vibration in rod member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050017668A KR100692391B1 (ko) | 2005-03-03 | 2005-03-03 | 역대칭 자기장 구조를 이용하여 봉부재에서 굽힘 진동을 발생 및 측정할 수 있는 전자기 음향 변환기 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20060098520A KR20060098520A (ko) | 2006-09-19 |
KR100692391B1 true KR100692391B1 (ko) | 2007-03-09 |
Family
ID=36570862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050017668A KR100692391B1 (ko) | 2005-03-03 | 2005-03-03 | 역대칭 자기장 구조를 이용하여 봉부재에서 굽힘 진동을 발생 및 측정할 수 있는 전자기 음향 변환기 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7742616B2 (ko) |
EP (1) | EP1698892A3 (ko) |
JP (1) | JP4414962B2 (ko) |
KR (1) | KR100692391B1 (ko) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI372066B (en) * | 2003-10-01 | 2012-09-11 | Wyeth Corp | Pantoprazole multiparticulate formulations |
US7332849B2 (en) * | 2006-05-19 | 2008-02-19 | Nanyang Technological University | Method and transducers for dynamic testing of structures and materials |
KR101073686B1 (ko) * | 2009-04-08 | 2011-10-14 | 서울대학교산학협력단 | 분절형 자기변형 패치 배열 트랜스듀서, 이를 구비한 구조 진단 장치 및 이 트랜스듀서의 작동 방법 |
KR101449411B1 (ko) | 2013-04-12 | 2014-10-14 | 한국원자력안전기술원 | 복합재 비파괴검사용 전자기 음향트랜스듀서 및 그를 이용한 비파괴검사방법 |
JP6585217B2 (ja) * | 2018-03-27 | 2019-10-02 | 辻野 次郎丸 | 複合曲げ振動検出方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040015575A (ko) * | 2002-08-13 | 2004-02-19 | 현대자동차주식회사 | 자동차의 축 굽힘진동 측정장치 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5716330Y2 (ko) | 1977-05-19 | 1982-04-06 | ||
JPS55111304A (en) | 1979-02-16 | 1980-08-27 | Teruo Mabuchi | Wooden board placement machine for wood working machinery |
JPS6025290B2 (ja) | 1979-06-18 | 1985-06-17 | 極東開発工業株式会社 | ダンプボデイの後部枢支装置 |
JPS599528A (ja) | 1982-07-09 | 1984-01-18 | Canon Inc | トルクセンサ |
JPS59228162A (ja) | 1983-06-06 | 1984-12-21 | マンネスマン・アクチエンゲゼルシヤフト | 超音波により欠陥の有無について金属パイプを検査する装置 |
JPS60105960A (ja) | 1983-11-14 | 1985-06-11 | Mitsubishi Electric Corp | 電磁超音波トランスデユ−サ |
DE3635207A1 (de) | 1986-10-16 | 1988-04-28 | Daimler Benz Ag | Einrichtung zur beruehrungslosen indirekten elektrischen messung des drehmomentes an einer welle |
JPH07119657B2 (ja) | 1987-09-29 | 1995-12-20 | 株式会社日本自動車部品総合研究所 | トルク検出装置 |
US5581037A (en) * | 1992-11-06 | 1996-12-03 | Southwest Research Institute | Nondestructive evaluation of pipes and tubes using magnetostrictive sensors |
KR100517795B1 (ko) * | 2002-11-08 | 2005-10-04 | 재단법인서울대학교산학협력재단 | 마그네토스트릭션 센서를 이용한 굽힘파 및 굽힘진동 측정장치및 방법 |
-
2005
- 2005-03-03 KR KR1020050017668A patent/KR100692391B1/ko active IP Right Grant
- 2005-11-28 US US11/287,370 patent/US7742616B2/en active Active
- 2005-12-27 JP JP2005375932A patent/JP4414962B2/ja not_active Expired - Fee Related
- 2005-12-30 EP EP05258122A patent/EP1698892A3/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040015575A (ko) * | 2002-08-13 | 2004-02-19 | 현대자동차주식회사 | 자동차의 축 굽힘진동 측정장치 |
Also Published As
Publication number | Publication date |
---|---|
US7742616B2 (en) | 2010-06-22 |
EP1698892A3 (en) | 2011-03-30 |
JP2006246436A (ja) | 2006-09-14 |
US20060210100A1 (en) | 2006-09-21 |
KR20060098520A (ko) | 2006-09-19 |
JP4414962B2 (ja) | 2010-02-17 |
EP1698892A2 (en) | 2006-09-06 |
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