JPS57139659A - Method and device for magnetic flaw detection - Google Patents

Method and device for magnetic flaw detection

Info

Publication number
JPS57139659A
JPS57139659A JP56026622A JP2662281A JPS57139659A JP S57139659 A JPS57139659 A JP S57139659A JP 56026622 A JP56026622 A JP 56026622A JP 2662281 A JP2662281 A JP 2662281A JP S57139659 A JPS57139659 A JP S57139659A
Authority
JP
Japan
Prior art keywords
magnetic
checked
flaw
magnetic sensor
variation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56026622A
Other languages
Japanese (ja)
Inventor
Yoshikazu Toda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
Shimadzu Corp
Shimazu Seisakusho KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp, Shimazu Seisakusho KK filed Critical Shimadzu Corp
Priority to JP56026622A priority Critical patent/JPS57139659A/en
Publication of JPS57139659A publication Critical patent/JPS57139659A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

PURPOSE:To miniaturize the device, by passing magnetic flux through a magnetic sensor which can detect the variation in the magnetic flux that is relatively varied with respect to a body to be checked, and detecting the flaw by the magnetic sensor wherein the magnetic flux varies in response to the variation of the magnetic resistance due to the flux flaw of the body to be checked. CONSTITUTION:The magnetic flux generating surface faces the surface of the body 1 whose flaw is to be checked with a specified distance being provided. The magnetic sensor 4 is arranged between a magnetizing mechanism and the body to be checked 1. Said magnetic sensor 4 is always arranged in the region of the magnetic flux generated by the magnetizing mechanism. The magnetic sensor 4 detects the variation in the magnetic fluxes in response to the magnetic resistance variation due to the flaw 1' in the body to be checked 1, thereby performing flaw detection. The position of the magnetic sensor is not limited to the region between a magnetic iron core 2 and the body to be checked 1, and the relationship between the magnetizing mechanism and the magnetic sensor can be adjusted. As a result, the mechanical system of the flaw detecting device can be simplified and the device is miniaturized.
JP56026622A 1981-02-24 1981-02-24 Method and device for magnetic flaw detection Pending JPS57139659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56026622A JPS57139659A (en) 1981-02-24 1981-02-24 Method and device for magnetic flaw detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026622A JPS57139659A (en) 1981-02-24 1981-02-24 Method and device for magnetic flaw detection

Publications (1)

Publication Number Publication Date
JPS57139659A true JPS57139659A (en) 1982-08-28

Family

ID=12198563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026622A Pending JPS57139659A (en) 1981-02-24 1981-02-24 Method and device for magnetic flaw detection

Country Status (1)

Country Link
JP (1) JPS57139659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7063482B2 (en) 2002-10-01 2006-06-20 Denso Corporation Crack-preventive screw-fastening structure for resinous housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7063482B2 (en) 2002-10-01 2006-06-20 Denso Corporation Crack-preventive screw-fastening structure for resinous housing

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