KR20070104993A - Yoke type magnetic particle tester - Google Patents

Yoke type magnetic particle tester Download PDF

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KR20070104993A
KR20070104993A KR1020060036685A KR20060036685A KR20070104993A KR 20070104993 A KR20070104993 A KR 20070104993A KR 1020060036685 A KR1020060036685 A KR 1020060036685A KR 20060036685 A KR20060036685 A KR 20060036685A KR 20070104993 A KR20070104993 A KR 20070104993A
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South Korea
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yoke
magnetic particle
degrees
electrode
variable
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KR1020060036685A
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Korean (ko)
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KR100775968B1 (en
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대 혁 정
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나우기연주식회사
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    • 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
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
    • 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
    • G01N27/825—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by using magnetic attraction force
    • 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
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/87—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using probes
    • 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
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

Abstract

A yoke type magnetic particle tester for inspecting defects of industrial equipment is provided to easily inspect surface defects and to improve inspection quality by enabling free rotation. A yoke type magnetic particle tester for inspecting defects of industrial equipment comprises a tester main body(1), a yoke electrode(3) and a mounting unit. The tester main body includes a coil, an iron core(5) coupled to a power supply, and outer insulating material(7). The yoke electrode is contacted with inspected equipment, and formed in at least two step links so that the body thereof is diffracted by 90 degrees. The yoke electrode is able to be separated regarding the tester main body and coupled to the mounting unit.

Description

가변형 자분탐상기{YOKE TYPE MAGNETIC PARTICLE TESTER}Variable Magnetic Particle Detector {YOKE TYPE MAGNETIC PARTICLE TESTER}

도 1은 본 발명의 가변형 자분탐상기를 도시한 분해 사시도이고,1 is an exploded perspective view showing a variable magnetic particle detector of the present invention,

도 2는 도 1의 정면 구성도이며,FIG. 2 is a front configuration diagram of FIG. 1;

도 3은 본 발명의 다른 실시 형태를 도시한 분해 사시도이고,3 is an exploded perspective view showing another embodiment of the present invention,

도 4는 도 3의 측면 구성도이다.4 is a side configuration diagram of FIG. 3.

본 발명은 산업설비의 결함 유무를 검사하는 자분탐상기에 관한 것으로서, 특히 일방향으로 180도 만큼 변형되는 요크를 90도 만큼 가변하여 착탈 가능하게 마운트함으로써, 접근이 어려운 산업설비의 구석진 부분이나 모서리 까지도 용이하게 검사할 수 있도록 하는 가변형 자분탐상기에 관한 것이다.The present invention relates to a magnetic flaw detector for inspecting defects of industrial equipment. In particular, the yoke, which is deformed by 180 degrees in one direction, is mounted to be detachably mounted by 90 degrees, so that even corners or corners of industrial equipment that are difficult to access are easily mounted. It relates to a variable magnetic particle detector that can be inspected.

피검체의 결함유무를 확인하기 위한 방법으로는 비파괴검사법이 사용된다. 비파괴검사법은 방사선 검사법, 초음파 검사법, 육안 검사법 등의 여러 가지 종류의 검사방법이 있지만, 그 중에서도 육안으로 발견할 수 없는 미세한 결함까지 자분(磁粉)을 이용하여 검출할 수 있도록 한 것이 자분탐상법으로 잘 알려져 있다.Nondestructive testing is used as a method to confirm the presence of defects on the subject. Non-destructive testing has various types of inspection methods such as radiographic examination, ultrasonic examination, and visual inspection, but among them, magnetic particle inspection is used to detect minute defects that cannot be detected with the naked eye. It is well known.

자분탐상법은 다른 비파괴검사법과 비교하여 표면 균열검사에 적합하고 작업 이 간단하며 피검체의 크기 및 형상 등에 구애받지 않고, 아울러 얇은 도장, 도금 및 비자성물질의 도포 등에도 작업이 가능한 장점이 있는 반면에, 강자성체 재료에 한정되며, 내부검사가 불가능하고, 불연속부의 위치가 자속방향에 수직이어야 하는 등의 몇가지의 단점도 있다.Compared to other non-destructive testing methods, magnetic particle inspection method is suitable for surface cracking test, and it is easy to work, regardless of the size and shape of the subject, and it can also work on thin coating, plating, and application of nonmagnetic materials. On the other hand, there are some disadvantages such as being limited to the ferromagnetic material, inability to inspect internally, and discontinuity of the portion to be perpendicular to the magnetic flux direction.

자분탐상법에서는 자분탐상기(探傷機)를 사용하며, 이는 시험기기의 종류에 따라 정치식 장비(stationary equipment), 휴대용, 프로드형(prod), 요크형(yoke) 등을 사용하고, 자화방법에 따라 축통전법, 직각통전법, 전류관통법, 코일법, 프로드법, 요크법(극간법), 자속관통법 등으로 구분할 수 있다. In the magnetic particle detection method, a magnetic particle detector is used, which uses stationary equipment, portable, prod, yoke, etc. according to the type of test equipment. Therefore, it can be classified into axial conduction method, right angle conduction method, current through method, coil method, Ford method, yoke method (interpolar method), magnetic flux through method and so on.

상술한 여러 종류의 자분탐상기 중에서, 본 발명이 속하는 기술분야는 시험기기의 종류로서 요크형을 사용하고 자화방법으로서 요크법을 사용하는 자분탐상기에 관한 것이다.Among the various types of magnetic particle flaw detectors described above, the technical field to which the present invention pertains relates to a magnetic particle flaw detector using a yoke type as a type of test equipment and a yoke method as a magnetization method.

한편 국내 등록실용신안공보 제 20-0161229호(1999. 08. 27)에는 변환형 휴대용 자분탐상기가 개시되어 있다. On the other hand, domestic registered utility model publication No. 20-0161229 (1999. 08. 27) discloses a conversion type portable magnetic particle detector.

상기 공보에 의한 자분탐상기는 통상의 고정식 요크형 장비를 사용할 경우, 피검체의 구석진 부분이나 모서리와 같이 접근이 어려운 부위를 검사할 때 불편하고 불완전하여 검사의 신뢰성이 떨어졌던 문제점을 해결하기 위하여, 피검체 설비의 형상에 따른 적절한 변환 사용이 가능하도록 한 변환형 휴대용 자분탐상기를 제안한다.In order to solve the problem that the magnetic particle flaw detector according to the above publication is inconvenient and incomplete when inspecting an inaccessible part such as a corner or a corner of a subject when using a conventional fixed yoke type equipment, We propose a conversion type portable magnetic particle detector capable of appropriate conversion and use according to the shape of the object installation.

상기한 자분탐상기는 피검체의 형상에 따라 말굽형과 "L"자형 및 "I"자형으 로 180도 만큼 자유롭게 회전시킬 수 있도록 하여, 표면 결함을 용이하게 검사하고 검사의 질을 향상시킬 수 있도록 하고 있다.The magnetic particle flaw detector can be freely rotated by 180 degrees in a horseshoe shape, an "L" shape, and an "I" shape according to the shape of the subject, so that surface defects can be easily inspected and the quality of inspection can be improved. Doing.

이와 같이 상기한 자분탐상기는 어느 정도 피검체에 맞추어 적절한 변환이 가능하다. 그러나 피검체의 검사 부위가 철심 방향에 대하여 수직한 방향에 위치할 경우에는, 여전히 피검 부위로의 접근 및 정확한 접촉이 어렵고, 검사 수행이 불편하며 검사의 신뢰성이 떨어지는 문제점을 안고 있는 실정이다.As described above, the magnetic particle flaw detector can be appropriately converted to the subject to some extent. However, when the test site of the subject is located in a direction perpendicular to the direction of the iron core, it is still difficult to access and accurately contact the test site, perform the test inconveniently, and have a problem of low reliability of the test.

상술한 종래기술의 문제점을 해결하기 위한 것으로서, 본 발명은 일방향으로 180도 만큼 변형되는 요크를 필요시 착탈이 가능하고 90도 만큼 회전한 후 다시 마운트할 수 있도록 구성하여, 피검체의 검사 공간이 협소하고 접근이 어려울 지라도 전극이 피검체에 대하여 수직하고 정확하게 접촉될 수 있도록 함으로써, 산업설비의 안전성 검사에 유용하게 사용하고 검사의 정확성 및 신뢰성을 확보할 수 있도록 함에 그 목적을 두고 있다.In order to solve the above-mentioned problems of the prior art, the present invention is configured to be detachable when necessary yoke deformed by 180 degrees in one direction and to be mounted after rotating by 90 degrees, so that the inspection space of the subject Even though it is narrow and difficult to access, the purpose of the electrode is to make vertical and accurate contact with the subject, so that it can be usefully used for safety inspection of industrial facilities and ensure the accuracy and reliability of the inspection.

상기 목적에 따라, 본 발명에서는 전원이 접속되는 코일과 철심 및 외장절연체를 포함하여 탐상기본체를 형성하고, 실제 피검체에 접촉되며 자체가 180도 만큼 회절되도록 적어도 2단 링크로 된 요크전극을 형성하며, 상기 요크전극은 탐상기본체에 대하여 분리 가능하고 90도 만큼씩 등각으로 회전 가능하며 소망 위치로 가변 후 마운팅수단에 의해 고정 결합됨을 특징으로 한다.In accordance with the above object, the present invention forms a flaw detection body including a coil, an iron core, and an outer insulator to which a power supply is connected, and forms a yoke electrode of at least two-stage links to be in contact with the actual subject and to diffract by 180 degrees. The yoke electrode is detachable with respect to the flaw detector and is rotated at an angle of 90 degrees, and is fixed to the desired position and fixedly coupled by a mounting means.

상기 요크전극은 용도에 따라 다양한 크기, 길이 및 다수 링크로 형성할 있고, 착탈은 물론 필요시 교체 가능한 것이다.The yoke electrode may be formed in various sizes, lengths, and multiple links according to the use, and may be detached or replaced if necessary.

마운팅수단은 탐상기본체에 홈을 형성하고 상기 요크전극에 결합돌기를 형성하여 상호 삽탈되도록 하고, 삽입 결합된 후에는 록킹볼트의 체결에 의해 고정되도록 한다.The mounting means forms grooves in the flaw detector body and forms coupling protrusions on the yoke electrodes so that they can be mutually inserted and inserted and fixed by fastening of the locking bolts.

이하, 본 발명을 실현하기 위한 바람직한 실시예를 첨부 도면에 의거하여 더욱 상세하게 설명하기로 한다.Hereinafter, preferred embodiments for realizing the present invention will be described in more detail with reference to the accompanying drawings.

도면 중에서, 도 1 및 도 2는 본 발명의 일 실시예로서 가변되기 전의 구조를 보여주고 있으며, 도 3 및 도 4는 90도 만큼 가변된 상태의 구조를 보여주고 있다.1 and 2 show the structure before the variable as an embodiment of the present invention, Figures 3 and 4 shows the structure of the variable state by 90 degrees.

도 1 및 도 2와 같이, 본 발명의 가변형 자분탐상기는 외관적으로 몸체부를 구성하며 손잡이 역할을 하는 탐상기본체(1)와, 그 탐상기본체(1)의 하부에 착탈식으로 장착되는 요크전극(3)로 이루어진다.1 and 2, the variable magnetic particle flaw detector according to the present invention constitutes a body part in appearance and serves as a handle, and a yoke electrode 3 detachably mounted to a lower part of the flaw detector 1. )

탐상기본체(1)는 주로 규소강판을 적층하여 만든 대략 "ㄷ"자형의 철심(5)과, 상기 철심(5)의 외주 일부에 권선되는 코일(도시생략)과, 상기 코일과 철심(5)을 함께 커버하여 감싸는 외장절연체(7)로 되어 있다.The flaw detection body 1 includes an iron core 5 having a substantially "c" shape made of laminated silicon steel sheets, a coil (not shown) wound around a part of the outer circumference of the iron core 5, and the coil and the iron core 5. It is made of an outer insulator (7) to cover and wrap together.

철심(5)은 도 1과 같이 하단부가 외장절연체(7)의 아래쪽으로 돌출되도록 형성할 수 있으며, 또한 도 2와 같이 외장절연체(7)의 내부에 수납되도록 형성할 수 있지만, 그러한 형태는 한정할 필요가 없으며 다양한 실시 형태가 가능한 것이다.The iron core 5 may be formed such that the lower end portion protrudes downward of the outer insulator 7 as shown in FIG. 1, and may be formed to be housed inside the outer insulator 7 as shown in FIG. 2, but such a shape is limited. It is not necessary to do this and various embodiments are possible.

탐상기본체(1)의 일측에는 외부 전원(도시생략)에 접속되는 전선 케이블을 연결하기 위한 전원 연결잭(9)을 형성하고, 소정의 위치에는 전원을 온/오프(ON/OFF)하는 스위치(도시생략)를 배치 구성한다.On one side of the flaw detector body 1, a power connection jack 9 for connecting an electric wire cable connected to an external power source (not shown) is formed, and a switch for turning the power ON / OFF at a predetermined position (not shown) Arrangement).

탐상기본체(1)의 하부에 착탈식으로 결합되는 요크전극(3)은 실제 산업설비인 피검체에 접촉되는 구성으로서, 그 자체가 180도 만큼 회절되도록 적어도 2단 이상의 링크체로 되어 있다. 본 발명의 도면에서 바람직한 실시 형태로 3단 링크체의 구조를 보여주고 있지만, 2단 및 4단의 구조로 형성할 수도 있음은 당연한 것이다.The yoke electrode 3 detachably coupled to the lower part of the flaw detector body 1 is configured to be in contact with a subject, which is an actual industrial facility, and has a link body of at least two stages so as to diffract itself by 180 degrees. Although the structure of the three-stage link body is shown by the preferred embodiment in the figure of this invention, it is natural that it can also be formed in two-stage and four-stage structure.

본 발명의 특징적인 구성으로서, 상기 요크전극(3)은 검사 작업 도중에 장애물과 마주하거나 구석진 부분 또는 협소하고 접근이 어려운 부분의 피검체를 대면할 경우, 탐상기본체(1)에 대하여 분리되고 90도 만큼 회전된 후 다시 결합될 수 있도록 가변형으로 구성함에 그 특징을 두고 있다.As a characteristic constitution of the present invention, the yoke electrode 3 is separated from the flaw detection body 1 by 90 degrees when facing an object in a corner or a narrow or inaccessible part during an inspection operation. It is characterized in that it is configured in a variable form so that it can be combined again after being rotated.

이를 위하여 요크전극(3)는 마운팅수단의 결합 해제에 의해 분리되고, 그 반대 작동에 의해 고정 결합되어 진다. 마운팅수단은 탐상기본체(1)의 철심(5) 단부에 홈(5a)을 형성하고, 상기 요크전극(3)에 결합돌기(3a)를 형성하여 상호 삽탈 가능하도록 한 것이며, 삽입 결합된 후에는 록킹볼트(11)의 체결에 의해 고정되도록 한다. To this end, the yoke electrode 3 is separated by the disengagement of the mounting means and fixedly coupled by the reverse operation. Mounting means is to form a groove (5a) at the end of the iron core (5) of the flaw detection body (1), and to form a coupling protrusion (3a) to the yoke electrode (3) to be removable from each other, after insertion It is to be fixed by the fastening of the locking bolt (11).

즉, 요크전극(3)은 도 2와 같이 자체가 180도 만큼 수평 방향으로만 회절 가능한 상태에서 검사작업을 수행하다가, 장애물과 마주하거나 구석진 부분 또는 협소하고 접근이 어려운 부분에 마주하게 되면, 필요에 따라 도 1과 같이 록킹볼트(11)의 체결을 해제하여 요크전극(3)을 분리하는 것이다.That is, when the yoke electrode 3 performs inspection while being diffracted only in the horizontal direction by 180 degrees as shown in FIG. 2, when the yoke electrode 3 faces an obstacle, a corner portion, or a narrow and difficult to access portion, it is necessary. As shown in FIG. 1, the fastening of the locking bolt 11 is released to separate the yoke electrode 3.

이후 필요에 따라 적절하게 요크전극(3)을 90도 만큼 회전하여 도 3 및 도 4와 같이 소망의 위치로 가변하는 것이며, 요크전극(3)의 결합돌기(3a)를 탐상기본 체(1)의 철심(5) 홈(5a)에 삽입한 다음 다시 록킹볼트(11)을 체결함에 의해 고정할 수 있는 것이다.Thereafter, if necessary, the yoke electrode 3 is rotated by 90 degrees so as to be changed to a desired position as shown in FIGS. 3 and 4, and the coupling protrusion 3a of the yoke electrode 3 is inspected based on the body 1. The iron core (5) of the groove (5a) and then can be fixed by fastening the locking bolt 11 again.

그 결과 본 발명의 요크전극(3)은 최초 수평 상태에서 180도 만큼만 회절하였던 것에 더하여, 탐상기본체(1)로부터 분리 가능하고 90도, 270도, 360도 만큼씩 등각으로 가변후 용이하게 다시 결합 고정되는 작용 효과를 얻을 수 있다.As a result, the yoke electrode 3 of the present invention, in addition to diffraction by only 180 degrees in the initial horizontal state, can be separated from the flaw detection body 1, and can be easily recombined after being changed at 90 degrees, 270 degrees, and 360 degrees. A fixed working effect can be obtained.

한편, 상기 요크전극(3)은 용도에 따라 다양한 크기, 길이 및 다수 링크로 변형할 수 있고, 상술한 바와 같이 착탈함은 물론 필요시에는 그 자체를 신품으로 교체하여 사용할 수도 있다.Meanwhile, the yoke electrode 3 may be deformed into various sizes, lengths, and multiple links according to the use, and as described above, the yoke electrode 3 may be replaced with a new one if necessary.

이상에서 설명한 본 발명의 실시예를 통하여 알 수 있는 바와 같이, 본 발명의 가변형 자분탐상기는 피검체의 검사 공간이 협소하고 접근이 어려운 작업 조건에서도 요크전극이 피검체에 대하여 수직하고 정확하게 접촉될 수 있도록 할 수 있는 것이며, 그 결과 피검체인 산업설비의 안전성 검사에 유용하고 검사의 정확성 및 신뢰성을 확보하는 효과를 얻을 수 있다.As can be seen through the embodiments of the present invention described above, the variable magnetic particle detector of the present invention can be in contact with the subject vertically and accurately with respect to the subject even in the working conditions of the test space is narrow and difficult to access the subject. As a result, it is useful for the safety inspection of the industrial equipment under test, and the effect of securing the accuracy and reliability of the inspection can be obtained.

또한, 본 발명의 가변형 구조는 검사하고자 하는 피검체의 형상에 따라 용이하게 변형이 가능하므로, 다양한 현장 조건에서 그 사용범위가 대단히 넓은 효과를 얻을 수 있다. In addition, the variable structure of the present invention can be easily deformed according to the shape of the subject to be inspected, so that the use range can be obtained in a wide range of field conditions.

이상에서는 본 발명의 가변형 자분탐상기에 대하여 서술하였지만, 이는 본 발명의 최상의 실시예를 설명한 것일 뿐이며 그에 한정되는 것은 아니다. 또한, 해당 기술분야의 통상의 지식을 가진 자이면 누구나 본 발명의 기술사상의 범주를 이 탈하지 않는 범위내에서 다양한 변형 및 모방 가능함이 사실이다. The variable magnetic particle detector of the present invention has been described above, but this is only illustrative of the best embodiment of the present invention and is not limited thereto. In addition, it is true that any person having ordinary skill in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (2)

자분을 이용하여 산업설비의 결함 유무를 검사하는 자분탐상기에 있어서,In the magnetic particle tester for inspecting the defect of industrial equipment using magnetic powder, 전원이 접속되는 코일과 철심 및 외장절연체를 포함하여 구성된 탐상기본체;A flaw detection basic body including a coil to which a power supply is connected, an iron core, and an outer insulator; 실제 피검체에 접촉되며 자체가 180도 만큼 회절되도록 적어도 2단의 링크로 형성된 요크전극; 그리고 A yoke electrode contacted with the actual subject and formed into at least two-stage links to diffract itself by 180 degrees; And 상기 요크전극은 탐상기본체에 대하여 분리 가능하고 90도 만큼씩 등각으로 회전 가능하며 소망 위치로 가변된 후 마운팅수단에 의해 고정 결합됨을 특징으로 하는 가변형 자분탐상기.The yoke electrode is detachable with respect to the flaw detection base body, and can be rotated at an equal angle by 90 degrees, variable variable magnetic particle detector characterized in that it is fixedly coupled by the mounting means after the variable. 제 1 항에 있어서, 마운팅수단은 탐상기본체에 형성된 홈과, 요크전극에 형성된 결합돌기와, 상기 홈과 결합돌기가 결합된 후 체결되는 록킹볼트를 포함하여 구성된 가변형 자분탐상기.The variable magnetic particle detector of claim 1, wherein the mounting means comprises a groove formed in the flaw detector body, a coupling protrusion formed in the yoke electrode, and a locking bolt fastened after the groove and the coupling protrusion are coupled to each other.
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CN109696470A (en) * 2018-08-20 2019-04-30 中电华创(苏州)电力技术研究有限公司 A kind of universal contact of non-destructive testing magnaflux
KR20190002372U (en) * 2018-03-15 2019-09-25 두산중공업 주식회사 Prod type Magnetic Particle Testing Device
KR20190002481U (en) * 2018-03-26 2019-10-07 두산중공업 주식회사 Prod type Magnetic Particle Testing Device
KR102461201B1 (en) * 2022-05-13 2022-10-31 (주)아이텍기술 Yoke type magnetic tester

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CN103091394A (en) * 2012-10-31 2013-05-08 吴江市宏达探伤器材有限公司 Electromagnetic yoke probe
KR102331285B1 (en) * 2021-09-14 2021-12-01 주식회사 지스콥 Magnetizing electrode device for nondestructive inspecting equipment with adjustable spacing between electrodes

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KR200161229Y1 (en) * 1997-12-19 1999-12-01 김형국 Yoke type magnetic particle tester
KR200161232Y1 (en) * 1997-12-19 1999-12-01 김형국 Yoke type magnetic particle tester

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KR20190002372U (en) * 2018-03-15 2019-09-25 두산중공업 주식회사 Prod type Magnetic Particle Testing Device
KR20190002481U (en) * 2018-03-26 2019-10-07 두산중공업 주식회사 Prod type Magnetic Particle Testing Device
CN109696470A (en) * 2018-08-20 2019-04-30 中电华创(苏州)电力技术研究有限公司 A kind of universal contact of non-destructive testing magnaflux
KR102461201B1 (en) * 2022-05-13 2022-10-31 (주)아이텍기술 Yoke type magnetic tester

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