JPS5663254A - Noise discrimination method in ultrasonic flaw detection - Google Patents

Noise discrimination method in ultrasonic flaw detection

Info

Publication number
JPS5663254A
JPS5663254A JP13929979A JP13929979A JPS5663254A JP S5663254 A JPS5663254 A JP S5663254A JP 13929979 A JP13929979 A JP 13929979A JP 13929979 A JP13929979 A JP 13929979A JP S5663254 A JPS5663254 A JP S5663254A
Authority
JP
Japan
Prior art keywords
signal
flaw detection
subject
supplied
probe
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
JP13929979A
Other languages
Japanese (ja)
Inventor
Mitsuo Yoshida
Kozo Ozaki
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP13929979A priority Critical patent/JPS5663254A/en
Publication of JPS5663254A publication Critical patent/JPS5663254A/en
Pending legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To prevent an erroneous recognition due to the multiplex echo of the bubbles or foreign matters in the liquid, by erasing the flaw detection signal of the subject at the moment when the signals caused by the bubbles or foreign matters in the liquid are detected.
CONSTITUTION: The ultrasonic wave 7 is transmitted to the subject 3 from the probe 1 and via the water 2, and the reflected wave is taken out via the probe 1 and then amplified. The defect signal is extracted and recorded, and the reflected wave is displayed on the cathode-ray tube when necessary. Then the flaw detection signal 17 of the subject 3 as well as the flaw detection signal 16 in the ultrasonic wave irradiation region 1A between the probe 1 and the subject 3 are taken out individually and then supplied to the AND gate 20, and the output of the gate 20 plus the signal 17 are supplied to the subtractor 21. The subtractor 21 transmits the defect signal 22 directly in case only the signal 17 is supplied, and the signal 17 is erased when the signal 16 is supplied along with the signal 17, and the signal 22 is not transmitted.
COPYRIGHT: (C)1981,JPO&Japio
JP13929979A 1979-10-30 1979-10-30 Noise discrimination method in ultrasonic flaw detection Pending JPS5663254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13929979A JPS5663254A (en) 1979-10-30 1979-10-30 Noise discrimination method in ultrasonic flaw detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13929979A JPS5663254A (en) 1979-10-30 1979-10-30 Noise discrimination method in ultrasonic flaw detection

Publications (1)

Publication Number Publication Date
JPS5663254A true JPS5663254A (en) 1981-05-29

Family

ID=15242039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13929979A Pending JPS5663254A (en) 1979-10-30 1979-10-30 Noise discrimination method in ultrasonic flaw detection

Country Status (1)

Country Link
JP (1) JPS5663254A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58214852A (en) * 1982-06-08 1983-12-14 Mitsubishi Electric Corp Ultrasonic flaw detecting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58214852A (en) * 1982-06-08 1983-12-14 Mitsubishi Electric Corp Ultrasonic flaw detecting apparatus

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