GB1448471A - Method of and apparatus for ultrasonic testing - Google Patents

Method of and apparatus for ultrasonic testing

Info

Publication number
GB1448471A
GB1448471A GB3705373A GB3705373A GB1448471A GB 1448471 A GB1448471 A GB 1448471A GB 3705373 A GB3705373 A GB 3705373A GB 3705373 A GB3705373 A GB 3705373A GB 1448471 A GB1448471 A GB 1448471A
Authority
GB
United Kingdom
Prior art keywords
pulses
specimen
reflected
reference signal
pulse
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.)
Expired
Application number
GB3705373A
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.)
Krautkraemer GmbH
Original Assignee
Krautkraemer GmbH
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 Krautkraemer GmbH filed Critical Krautkraemer GmbH
Publication of GB1448471A publication Critical patent/GB1448471A/en
Expired 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
    • 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
    • G01N29/40—Detecting the response signal, e.g. electronic circuits specially adapted therefor by amplitude filtering, e.g. by applying a threshold or by gain control

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

1448471 Ultrasonic inspection devices KRAUTKRAMER GmbH 3 Aug 1973 [3 Aug 1972] 37053/73 Heading H4D In a method of ultrasonic testing of a specimen by transmitting a pulse 10, Fig. 7, into the specimen and evaluating pulses reflected from defects, compensation for variations in the attentuation properties of the material of the specimen is effected by deriving a reference signal from a plurality of pluses 12 which are back-scattered from the structure of the specimen material and employing the reference signal to vary the energy of the transmitted pulse 10. The reference signal is derived by integrating the pulses 12 which are separated out from the received reflected signal train by a gating signal 15 which is timed to exclude both the pulse 11 which originates from the entry surface of the specimen and any pulses which are due to defects. The reference signal may in addition be employed to control the sensitivity of the pulse receiver. An apparatus is described with reference to Fig. 9 (not shown) which has a plurality of ultrasonic crystal probes for applying pulses to and receiving reflected pulses from a specimen, the arrangement being switchable so that measurement may be either direct, i.e. the transmitted and reflected defect pulses are passed through the same probe, or indirect, i.e. the transmitted pulse enters via one probe and the reflected defect pulses are detected by a second probe. In each case the reference signal for attenuation compensation is derived from back-scattered pulses received at the transmitting probe. Further probes are provided which transmit pulses perpendicular to the specimen surface and respond to pulses reflected from the specimen back wall to furnish a second reference signal which is employed to compensate for the coupling quality between the probes and specimen. Both the first and second reference signals control attenuator pads connected in the transmitting and receiving signal paths. Figs. 1-4 (not shown) illustrate constructions of crystals probes stated to be for use in the invention.
GB3705373A 1972-08-03 1973-08-03 Method of and apparatus for ultrasonic testing Expired GB1448471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722238130 DE2238130C3 (en) 1972-08-03 1972-08-03 Process for determining and compensating for different sound attenuation properties in ultrasonic material testing

Publications (1)

Publication Number Publication Date
GB1448471A true GB1448471A (en) 1976-09-08

Family

ID=5852522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3705373A Expired GB1448471A (en) 1972-08-03 1973-08-03 Method of and apparatus for ultrasonic testing

Country Status (3)

Country Link
DE (1) DE2238130C3 (en)
FR (1) FR2195351A5 (en)
GB (1) GB1448471A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299128A (en) * 1980-04-21 1981-11-10 Gruber George J Ultrasonic satellite-pulse technique for characterizing defects of arbitrary shape
US4570487A (en) * 1980-04-21 1986-02-18 Southwest Research Institute Multibeam satellite-pulse observation technique for characterizing cracks in bimetallic coarse-grained component
CN103969341A (en) * 2014-04-12 2014-08-06 化学工业设备质量监督检验中心 Ultrasonic testing special probe for butt girth welding of austenitic stainless steel pipe
CN109307568A (en) * 2018-11-16 2019-02-05 北京理工大学 The lossless detection method of welding residual stress and the probe for using this method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2632680A1 (en) * 1976-07-16 1978-01-19 Deutsch Pruef Messgeraete PROCEDURE FOR THE AUTOMATIC ADJUSTMENT AND CYCLING FEEDBACK OF MEASUREMENT RESULTS TO THE ADJUSTMENT OF TESTING SYSTEMS FOR NON-DESTRUCTIVE MATERIAL TESTING
FR2366546A1 (en) * 1976-10-01 1978-04-28 Krautkraemer Gmbh Appts. monitoring operation of ultrasonic testing of tubes and bars - senses echo signals by transmitter probe for amplification and application to threshold circuit
DE2827423C2 (en) * 1978-06-22 1987-04-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Device for determining the internal structure of a body using sound rays
FR2662501B1 (en) * 1990-05-28 1994-11-18 Valtubes METHOD FOR DETECTING DEFECTS ON METAL TUBES WITH INTERNAL HELICAL RIBS.
DE102014215654A1 (en) * 2014-08-07 2016-02-11 Siemens Aktiengesellschaft Apparatus and method for non-destructive testing of a component by means of ultrasound

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299128A (en) * 1980-04-21 1981-11-10 Gruber George J Ultrasonic satellite-pulse technique for characterizing defects of arbitrary shape
US4570487A (en) * 1980-04-21 1986-02-18 Southwest Research Institute Multibeam satellite-pulse observation technique for characterizing cracks in bimetallic coarse-grained component
CN103969341A (en) * 2014-04-12 2014-08-06 化学工业设备质量监督检验中心 Ultrasonic testing special probe for butt girth welding of austenitic stainless steel pipe
CN109307568A (en) * 2018-11-16 2019-02-05 北京理工大学 The lossless detection method of welding residual stress and the probe for using this method

Also Published As

Publication number Publication date
DE2238130C3 (en) 1980-10-09
FR2195351A5 (en) 1974-03-01
DE2238130A1 (en) 1974-02-14
DE2238130B2 (en) 1980-02-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee