JPS5710449A - Temperature compensation type crack measuring device - Google Patents

Temperature compensation type crack measuring device

Info

Publication number
JPS5710449A
JPS5710449A JP8421880A JP8421880A JPS5710449A JP S5710449 A JPS5710449 A JP S5710449A JP 8421880 A JP8421880 A JP 8421880A JP 8421880 A JP8421880 A JP 8421880A JP S5710449 A JPS5710449 A JP S5710449A
Authority
JP
Japan
Prior art keywords
propagation
crack
ultrasonic wave
velocity
temperature
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.)
Granted
Application number
JP8421880A
Other languages
Japanese (ja)
Other versions
JPS6351262B2 (en
Inventor
Teruo Kishi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP8421880A priority Critical patent/JPS5710449A/en
Publication of JPS5710449A publication Critical patent/JPS5710449A/en
Publication of JPS6351262B2 publication Critical patent/JPS6351262B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
    • 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
    • G01N2291/02854—Length, thickness

Abstract

PURPOSE:To correctly measure the conditions of cracks by taking into consideration the temperaure dependency of the velocity of propagation of ultrasonic waves and compensating the temperature variation of cracked parts. CONSTITUTION:When an actuator A is operated, a crack C propagate into the interior of a crack test piece 1 from a cut 1a. A trigger signal provided by a synchronizing signal circuit 12 causes the oscillator 2 of a vibrator 4 to emit an ultrasonic wave at a predetermined angle. The ultrasonic wave is reflected by one end C1 of the crack C, then is received by a receiver 3, and then applied to a CPU16 through a high speed response type head amplifier 9, a waveform shaping circuit 10 and a ratch circuit 11. A signal provided by a temperature sensor 19 is applied to an interface 21 for the temperature compensation of a signal corresponding to a velocity of propagation of ultrasonic wave from ROM20. The time of propagation of the ultrasonic wave, the temperature-compensated velocity of propagation and the position of the end C1 of the crack C can correctly be measured by means of the CPU16.
JP8421880A 1980-06-21 1980-06-21 Temperature compensation type crack measuring device Granted JPS5710449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8421880A JPS5710449A (en) 1980-06-21 1980-06-21 Temperature compensation type crack measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8421880A JPS5710449A (en) 1980-06-21 1980-06-21 Temperature compensation type crack measuring device

Publications (2)

Publication Number Publication Date
JPS5710449A true JPS5710449A (en) 1982-01-20
JPS6351262B2 JPS6351262B2 (en) 1988-10-13

Family

ID=13824335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8421880A Granted JPS5710449A (en) 1980-06-21 1980-06-21 Temperature compensation type crack measuring device

Country Status (1)

Country Link
JP (1) JPS5710449A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60196642A (en) * 1984-03-19 1985-10-05 Univ Osaka Method for measuring internal flaw and damage utilizing computer without destruction
JPH01203967A (en) * 1988-02-09 1989-08-16 Power Reactor & Nuclear Fuel Dev Corp Temperature compensation type ultrasonic flaw detector
JP2005326238A (en) * 2004-05-13 2005-11-24 Kyushu Electric Power Co Inc Crack development monitoring method and its device by ultrasonic tofd method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52143883A (en) * 1976-05-26 1977-11-30 Krautkraemer Gmbh Ultrasonic nonndestructive material test
JPS5381155A (en) * 1976-12-25 1978-07-18 Mitsubishi Heavy Ind Ltd Measuring method of crackin depth by ultrasonec waves

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52143883A (en) * 1976-05-26 1977-11-30 Krautkraemer Gmbh Ultrasonic nonndestructive material test
JPS5381155A (en) * 1976-12-25 1978-07-18 Mitsubishi Heavy Ind Ltd Measuring method of crackin depth by ultrasonec waves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60196642A (en) * 1984-03-19 1985-10-05 Univ Osaka Method for measuring internal flaw and damage utilizing computer without destruction
JPH0412412B2 (en) * 1984-03-19 1992-03-04 Oosaka Daigakucho
JPH01203967A (en) * 1988-02-09 1989-08-16 Power Reactor & Nuclear Fuel Dev Corp Temperature compensation type ultrasonic flaw detector
JP2005326238A (en) * 2004-05-13 2005-11-24 Kyushu Electric Power Co Inc Crack development monitoring method and its device by ultrasonic tofd method

Also Published As

Publication number Publication date
JPS6351262B2 (en) 1988-10-13

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