KR930008453A - Vortex flaw detector - Google Patents

Vortex flaw detector Download PDF

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Publication number
KR930008453A
KR930008453A KR1019910018937A KR910018937A KR930008453A KR 930008453 A KR930008453 A KR 930008453A KR 1019910018937 A KR1019910018937 A KR 1019910018937A KR 910018937 A KR910018937 A KR 910018937A KR 930008453 A KR930008453 A KR 930008453A
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South Korea
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circuit
detection
phase
signal
flaw detector
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KR1019910018937A
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Korean (ko)
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KR0163959B1 (en
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쭈토무 마수이
카즈마사 호리
아키오 우에노
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후지무라 마사야
미쓰비시 마테리알 카부시키가이샤
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Priority to KR1019910018937A priority Critical patent/KR0163959B1/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

본 발명은, 코일에 의해 발생되는 자계가 역위상으로 되도록 도체의 반송로를 따라서 도체와 동일축상에 이간하여 배치되는 한 쌍의 검출코일과, 검출코일이 브릿지의 2변을 구성하며, 검출코일의 인덕턴스에 상대변화가 발생하여 브릿지의 평형이 붕괴되면, 이상검출신호를 출력하는 교류브릿지회로와 검출코일의 사이에 발생되는 자계가 서로 동위상으로 되도록 검출코일과 동일 축상에 배치되어서, 브릿지가 평형한 상태에서는 발생되는 유도전류가 서로 상쇄하도록 설정되어 있는 한 쌍의 공진코일과, 검출코일의 발진주파수를 공진시킬 목적으로 공진코일에 접속되어 있는 용량회로를 보유하는 와류탐상장치를 개시한다.According to the present invention, a pair of detection coils are disposed apart on the same axis as the conductors along the conveyance path of the conductors so that the magnetic field generated by the coils is in reverse phase, and the detection coils constitute two sides of the bridge. When a relative change occurs in the inductance of the bridge and the balance of the bridge collapses, the bridge is arranged on the same axis as the detection coil so that the magnetic fields generated between the AC bridge circuit for outputting the abnormal detection signal and the detection coil are in phase with each other. Disclosed are a vortex flaw detector which has a pair of resonant coils set so as to cancel the induced currents in a balanced state, and a capacitor circuit connected to the resonant coils for the purpose of resonating the oscillation frequency of the detection coil.

Description

와류탐삼(渦流探賞)장치Vortex Tamsam Device

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

제1도는 본 발명에 관한 와류탐상장치의 개략구성을 나타내는 회로도.1 is a circuit diagram showing a schematic configuration of a vortex flaw detector according to the present invention.

제2도는 동장치에 있어서의 용량회로의 한가지 예를 나타내는 회로도.2 is a circuit diagram showing one example of a capacitor circuit in the same apparatus.

제3도 및 제4도는 동장치의 동작을 나타내는 도면.3 and 4 show the operation of the apparatus.

Claims (5)

코일에 의해 발생되는 자계가 역위상으로 되도록 도체(1)의 반송로를 따라서 전기한 도체의 반송로와 동일축상에 이간하여 배치되는 한 쌍의 검출코일(L1)(L4) 보유하며, 전기한 검출 코일의 인덕턴스가 상대변화하며 브릿지의 평형이 붕괴될 때 이상 검출신호를 출력하는 교류 브릿지회로(3)과, 전기한 검출코일의 사이에, 발생되는 자계가 서로 동위상으로 되도록 전기한 검출코일과 동일축 상에 배치되어서, 전기한 브릿지가 평형한 상태에서는 발생되는 유도전류가 서로 상쇄하도록 설정되어 있는 한 쌍의 공진코일(L2)(L3)과, 공진회로를 구성하기 위해 전기한 공진코일에 접속되어 있는 용량회로(4)로 이루어지는 것을 특징으로 하는 와류탐상장치.It holds a pair of detection coils (L1) (L4) which are spaced apart on the same axis as the conveying path of the conductors along the conveying path of the conductor 1 so that the magnetic field generated by the coil is reversed. A detection coil in which the alternating inductance of the detection coil is changed relative to each other and the AC bridge circuit 3 which outputs an abnormal detection signal when the balance of the bridge collapses and the magnetic field generated are in phase with each other. And a pair of resonant coils L2 and L3 which are arranged on the same axis and set so that induced currents generated when the electric bridges are balanced cancel each other, and the resonant coils electric to form a resonant circuit. Vortex flaw detector comprising a capacitor circuit (4) connected to. 제1항에 있어서, 전기한 용량회로(4)에는 전기한 공진회로의 공진주파수를 조정하기 위한 주파수조정장치가 설치되어 있는 것을 특징으로 하는 와류탐상장치.The vortex flaw detector according to claim 1, wherein the capacitance circuit (4) is provided with a frequency adjusting device for adjusting the resonance frequency of the electrical resonance circuit. 제1항에 있어서, 전기한 용량회로(4)에는 전기한 공진회로의 공진 Q값을 조정하기 위한 Q값 조정장치가 설치되어 있는 것을 특징으로 하는 와류탐상장치.The vortex flaw detector according to claim 1, wherein the capacitance circuit (4) is provided with a Q value adjusting device for adjusting the resonance Q value of the electrical resonance circuit. 제1항애 있어서, 동일한 각 주파수를 보유하고, 한 쪽의 위상의 다른 쪽의 위상으로부터 π/2만큼 편이되어 있으며, 그중 한 쪽이 전기한 교류브릿지회로(3)에 공급되는 제1 및 제2주기 신호(P1)(P2)를 발생하는 교류전원(2)과, 검출신호를 얻기 위하여 전기한 교류브릿지회로(3)의 2개의 접속점(A)(B) 사이에서 발생되는 신호를 증폭하는 차동증폭기(30)와, 전기한 제1주기신호(P1)와 동기화 되어서 전기한 검출신호 내에 포함되어 있는 X축 성분신호를 검출하는 제1위상검출회로(50)와, 전기한 제2주기신호(P2)와 동기화 되어서 전기한 검출신호 내에 포함되어 있는 Y축 성분신호를 검출하는 제2위상검출회로(60)와, 전기한 X축 및 Y축 성분신호에 기초한 전기한 검출 신호의 벡터를 표시한 표시장치가 더 구성되어 있는 것을 특징으로 하는 와류탐상장치.2. The first and second circuits according to claim 1, having the same respective frequencies and being shifted by? / 2 from the other phase of one phase, one of which is supplied to the alternating current bridge circuit (3). A differential that amplifies the signal generated between the AC power supply 2 generating the periodic signals P1 and P2 and the two connection points A and B of the AC bridge circuit 3, which have been electricized to obtain the detection signal. A first phase detection circuit 50 for detecting the X-axis component signal included in the detection signal in synchronization with the amplifier 30, the first period signal P1 described above, and the second period signal ( A second phase detection circuit 60 for detecting the Y-axis component signal included in the detected signal in synchronization with P2) and a vector of the detected signal based on the aforementioned X-axis and Y-axis component signals. Vortex flaw detector, characterized in that the display device is further configured. 제4항에 있어서, 전기한 교류브릿지회로(3)에 공급되는 주기신호(P1)의 위상을 조정하기 위한 위상조정장치가 더 구성되어 있는 것을 특징으로 하는 와류탐상장치.5. The vortex flaw detector according to claim 4, further comprising a phase adjusting device for adjusting the phase of the periodic signal (P1) supplied to the alternating current bridge circuit (3). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910018937A 1991-10-26 1991-10-26 Eddy current flaw detection apparatus KR0163959B1 (en)

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KR1019910018937A KR0163959B1 (en) 1991-10-26 1991-10-26 Eddy current flaw detection apparatus

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Application Number Priority Date Filing Date Title
KR1019910018937A KR0163959B1 (en) 1991-10-26 1991-10-26 Eddy current flaw detection apparatus

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KR930008453A true KR930008453A (en) 1993-05-21
KR0163959B1 KR0163959B1 (en) 1999-05-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000061149A (en) * 1999-03-24 2000-10-16 이영일 A thermoplastic resin composition
KR20200088439A (en) * 2018-02-01 2020-07-22 가부시키가이샤 시마즈세이사쿠쇼 Wire rope inspection device, wire rope inspection system and wire rope inspection method
KR102187020B1 (en) * 2020-05-27 2020-12-04 김미영 Composition for lusterless layer and the lusterless film manufacturing method using the composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107709982B (en) * 2015-06-25 2021-10-22 新东工业株式会社 Surface property evaluation device and surface property evaluation method for steel material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000061149A (en) * 1999-03-24 2000-10-16 이영일 A thermoplastic resin composition
KR20200088439A (en) * 2018-02-01 2020-07-22 가부시키가이샤 시마즈세이사쿠쇼 Wire rope inspection device, wire rope inspection system and wire rope inspection method
KR102187020B1 (en) * 2020-05-27 2020-12-04 김미영 Composition for lusterless layer and the lusterless film manufacturing method using the composition

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