FR2361647A1 - Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes - Google Patents

Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes

Info

Publication number
FR2361647A1
FR2361647A1 FR7624335A FR7624335A FR2361647A1 FR 2361647 A1 FR2361647 A1 FR 2361647A1 FR 7624335 A FR7624335 A FR 7624335A FR 7624335 A FR7624335 A FR 7624335A FR 2361647 A1 FR2361647 A1 FR 2361647A1
Authority
FR
France
Prior art keywords
tubes
signal
partic
parasitic signals
sweep
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
FR7624335A
Other languages
French (fr)
Other versions
FR2361647B1 (en
Inventor
Michel Loyet
Jean Perdijon
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to FR7624335A priority Critical patent/FR2361647A1/en
Publication of FR2361647A1 publication Critical patent/FR2361647A1/en
Application granted granted Critical
Publication of FR2361647B1 publication Critical patent/FR2361647B1/fr
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
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • 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
    • G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • 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
    • G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/42—Detecting the response signal, e.g. electronic circuits specially adapted therefor by frequency filtering or by tuning to resonant frequency
    • 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
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2634—Surfaces cylindrical from outside

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

An ultrasonic method of inspection, partic. of tubes used to protect nuclear fuels, comprises sweeping the tubes with an ultrasonic beam. collecting the reflected ultrasonic wave and analysing and recording the signal. The signal is filtered around the sweep frequency, after the analysis and before the recording. The appts. includes, in addition to the transducer, the helicoidal sweep device, the reflected beam receiver and the analysis circuits, a band-pass filter centred on the sweep frequency, and positioned between the analysis circuits, and the recorder. Parasitic signals, due to the granular structure of the tubes, are reduced. The frequency impulses characteristic of a fault is that of the sweep, e.g. that of rotation of the tube under inspection. The parasitic signals have greater frequency and are filtered out.
FR7624335A 1976-08-09 1976-08-09 Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes Granted FR2361647A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7624335A FR2361647A1 (en) 1976-08-09 1976-08-09 Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7624335A FR2361647A1 (en) 1976-08-09 1976-08-09 Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes

Publications (2)

Publication Number Publication Date
FR2361647A1 true FR2361647A1 (en) 1978-03-10
FR2361647B1 FR2361647B1 (en) 1978-12-22

Family

ID=9176705

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7624335A Granted FR2361647A1 (en) 1976-08-09 1976-08-09 Ultrasonic inspection of components, partic. nuclear fuel tubes - includes filtering the signal at sweep frequency, minimising parasitic signals due to granular structure of the tubes

Country Status (1)

Country Link
FR (1) FR2361647A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444926A1 (en) * 1978-12-18 1980-07-18 Budd Co METHOD AND APPARATUS FOR VERIFYING THE DIAMETER OF WELDING POINTS OF A WHEEL
EP0024991A1 (en) * 1979-08-28 1981-03-11 Framatome Device for detecting flaws in a metallic plate by means of eddy currents, and method using this device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444926A1 (en) * 1978-12-18 1980-07-18 Budd Co METHOD AND APPARATUS FOR VERIFYING THE DIAMETER OF WELDING POINTS OF A WHEEL
EP0024991A1 (en) * 1979-08-28 1981-03-11 Framatome Device for detecting flaws in a metallic plate by means of eddy currents, and method using this device

Also Published As

Publication number Publication date
FR2361647B1 (en) 1978-12-22

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse