FR2391471A1 - Ultrasonic fault differentiator for non-destructive testing - uses echo amplitude and reflections to differentiate between non-metallic inclusions and fissures - Google Patents

Ultrasonic fault differentiator for non-destructive testing - uses echo amplitude and reflections to differentiate between non-metallic inclusions and fissures

Info

Publication number
FR2391471A1
FR2391471A1 FR7814666A FR7814666A FR2391471A1 FR 2391471 A1 FR2391471 A1 FR 2391471A1 FR 7814666 A FR7814666 A FR 7814666A FR 7814666 A FR7814666 A FR 7814666A FR 2391471 A1 FR2391471 A1 FR 2391471A1
Authority
FR
France
Prior art keywords
fissures
destructive testing
metallic inclusions
differentiator
reflections
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.)
Withdrawn
Application number
FR7814666A
Other languages
French (fr)
Inventor
Hans Schneider
Jurgen Riefel
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of FR2391471A1 publication Critical patent/FR2391471A1/en
Withdrawn legal-status Critical Current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
    • G01N29/04—Analysing solids
    • G01N29/11—Analysing solids by measuring attenuation of acoustic waves
    • 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
    • G01N29/04—Analysing solids
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • G01N29/0609—Display arrangements, e.g. colour displays
    • G01N29/0618—Display arrangements, e.g. colour displays synchronised with scanning, e.g. in real-time
    • 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
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/48—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by amplitude comparison
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • 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
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture
    • 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

Abstract

In the system during non-destructive testing using ultrasonics the n on-metallic inclusions are differentiated from fault conditions such as fissures. The differences are determined from form of the echo. A number of channels are controlled by a timing generator (4) by multiplexing acoustic transducers (1) with transmit receive amplifiers (2) coupled to a principal amplifier and multiplexing assembly (3). The echo (9) amplitudes are monitored (5) by comparing with a reference and the echos are also evaluated (6). The difference signals are applied to a combining circuit (7) to produce reflected radiation for transfer to an output unit (8).
FR7814666A 1977-05-16 1978-05-11 Ultrasonic fault differentiator for non-destructive testing - uses echo amplitude and reflections to differentiate between non-metallic inclusions and fissures Withdrawn FR2391471A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2722709 1977-05-16

Publications (1)

Publication Number Publication Date
FR2391471A1 true FR2391471A1 (en) 1978-12-15

Family

ID=6009407

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7814666A Withdrawn FR2391471A1 (en) 1977-05-16 1978-05-11 Ultrasonic fault differentiator for non-destructive testing - uses echo amplitude and reflections to differentiate between non-metallic inclusions and fissures

Country Status (3)

Country Link
JP (1) JPS53143386A (en)
FR (1) FR2391471A1 (en)
IT (1) IT1096070B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465225A1 (en) * 1979-09-17 1981-03-20 Electric Power Res Inst METHOD OF CONTROLLING DEFECTS IN TUBULAR PRODUCTS
EP0132187A1 (en) * 1983-07-19 1985-01-23 Gaz De France Method of detecting defaults, in particular internal defaults such as fissures in welded joints

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465225A1 (en) * 1979-09-17 1981-03-20 Electric Power Res Inst METHOD OF CONTROLLING DEFECTS IN TUBULAR PRODUCTS
EP0132187A1 (en) * 1983-07-19 1985-01-23 Gaz De France Method of detecting defaults, in particular internal defaults such as fissures in welded joints
FR2549607A1 (en) * 1983-07-19 1985-01-25 Gaz De France METHOD FOR DETECTING DEFECTS, ESPECIALLY INTERNAL, SUCH AS CRACKS IN WELDED JOINTS

Also Published As

Publication number Publication date
JPS53143386A (en) 1978-12-13
IT7823018A0 (en) 1978-05-04
IT1096070B (en) 1985-08-17

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Legal Events

Date Code Title Description
ST Notification of lapse