JPS57197411A - Detecting method through ultrasonic wave - Google Patents

Detecting method through ultrasonic wave

Info

Publication number
JPS57197411A
JPS57197411A JP8345981A JP8345981A JPS57197411A JP S57197411 A JPS57197411 A JP S57197411A JP 8345981 A JP8345981 A JP 8345981A JP 8345981 A JP8345981 A JP 8345981A JP S57197411 A JPS57197411 A JP S57197411A
Authority
JP
Japan
Prior art keywords
detection
block
finder
magnetism
ultrasonic
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
JP8345981A
Other languages
Japanese (ja)
Inventor
Masashi Mizuno
Katsuhiro Kojima
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co Ltd
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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP8345981A priority Critical patent/JPS57197411A/en
Publication of JPS57197411A publication Critical patent/JPS57197411A/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
    • 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
    • G01N29/228—Details, e.g. general constructional or apparatus details related to high temperature conditions
    • 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
    • G01N2291/02863—Electric or magnetic parameters
    • 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
    • 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
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
    • 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
    • G01N2291/10—Number of transducers
    • G01N2291/102—Number of transducers one emitter, one receiver

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To increase the accuracy of detection, by making detection near the transition point of magnetism, in detecting a magnetic substance with ultrasonic waves. CONSTITUTION:A cast iron block 2 is magnetized with the primary coil of a detecting element 3A of a permeability meter 3 while the block 2 is heated in a heating furnace 1, the change in the magnetic flux when the magnetic field is inverted is detected with the secondary coil, and a permeability mu is displayed on the meter 3. The mu is gradually decreased with the increase in temperature and again gradually increases and then suddenly is reduced. Since this point is the transition point of magnetism (720-780 deg.C) of the block 2, when sudden decrease in the mu is recognized, ultrasonic wave pulses are given to the block 2 from the transmitter of a detecting element 4A of an ultrasonic crack finder 4, the reflected wave from flaws is detected at the receiver of the element 4A and displayed to the finder 4. Since the detection is made at high temperatures, the accuracy of detection can be increased.
JP8345981A 1981-05-29 1981-05-29 Detecting method through ultrasonic wave Pending JPS57197411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8345981A JPS57197411A (en) 1981-05-29 1981-05-29 Detecting method through ultrasonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8345981A JPS57197411A (en) 1981-05-29 1981-05-29 Detecting method through ultrasonic wave

Publications (1)

Publication Number Publication Date
JPS57197411A true JPS57197411A (en) 1982-12-03

Family

ID=13803042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8345981A Pending JPS57197411A (en) 1981-05-29 1981-05-29 Detecting method through ultrasonic wave

Country Status (1)

Country Link
JP (1) JPS57197411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240357A (en) * 1991-08-07 1993-08-31 Omi Kogyo Co., Ltd. Annular hole cutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240357A (en) * 1991-08-07 1993-08-31 Omi Kogyo Co., Ltd. Annular hole cutter

Similar Documents

Publication Publication Date Title
JPS57197411A (en) Detecting method through ultrasonic wave
JPS55156810A (en) Displacement detector
JPS5753604A (en) Thickness gauge
JPS5225688A (en) Hot ultrasonic probe
JPS55109977A (en) Detecting method for underground body
JPS57197412A (en) Continuous detecting method through ultrasonic wave
JPS59114417A (en) Measurement of molten metal level for continuously casting mold
JPS57192872A (en) Eddy current type flow velocity meter
JPS59231447A (en) Measurement of transformation amount ratio by pulse current
JPS5892825A (en) Ultrasonic level meter
JPS56148053A (en) Flaw detection for eddy flow in hot steel
JPS52127387A (en) Ultrasonic locator for hot operation
JPS5552921A (en) Temperature detector
SU987392A1 (en) Electromagnetic consumption converter
JPS5544929A (en) Magnetic flowmeter by utilizing pig
JPS5752856A (en) Electromagnetic ultrasonic flaw detecting device
JPS63145908A (en) Measurement of thickness
JPS56112602A (en) Measuring device for thickness of nonmagnetic thin metal plate
JPS5431785A (en) Eddy current type current meter
GB1271260A (en) Overheat detector
SU714271A1 (en) Device for ultasonic inspection of ferromagnetic articles
SU609973A1 (en) Method of calibration of magnetic flowmeters
JPS57110911A (en) Measurement of length of object by supersonic wave
JPS56126787A (en) Measurement of depth of underground body
JPS5340552A (en) Magnetic material detector