GB1445151A - Apparatus for determining the wall thickness of specimens such as plates or the like by ultrasonic methods - Google Patents

Apparatus for determining the wall thickness of specimens such as plates or the like by ultrasonic methods

Info

Publication number
GB1445151A
GB1445151A GB4028173A GB4028173A GB1445151A GB 1445151 A GB1445151 A GB 1445151A GB 4028173 A GB4028173 A GB 4028173A GB 4028173 A GB4028173 A GB 4028173A GB 1445151 A GB1445151 A GB 1445151A
Authority
GB
United Kingdom
Prior art keywords
wavetrain
determining
specimen
received
count
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
GB4028173A
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 GB1445151A publication Critical patent/GB1445151A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/14—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

1445151 Ultrasonic thickness gauge KRAUTKRAMER GmbH 24 Aug 1973 [29 Aug 1972] 40281/73 Heading H4D In a system for measuring the wall thickness of a specimen, by transmitting an acoustic pulse into the specimen to excite a wall resonance and determining the oscillation frequency of a time-gated portion of the resulting wavetrain received from the specimen, a clocked counter is arranged to count upwards from an initial value for the duration of the transmission pulse and is switched to count downwards when the leading edge of the wavetrain is received. When the initial count value is reached, a delay period (a selected number of oscillation cycles of the receiver signal) elapses before a frequency counter for determining the oscillation frequency is switched on. The required time-gate thus includes a substantially pure (decaying) sinusoidal portion of the wavetrain. A gated portion of the wavetrain is also fed back to the transmitter to re-excite the wall resonance (a noise generator having been used for the initial excitation). The apparatus is adjusted to give maximum deflection on a received signal amplitude monitor.
GB4028173A 1972-08-29 1973-08-24 Apparatus for determining the wall thickness of specimens such as plates or the like by ultrasonic methods Expired GB1445151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722242466 DE2242466C3 (en) 1972-08-29 1972-08-29 Switching device for determining the wall thickness of measurement objects such as plates or the like. according to the ultrasonic method

Publications (1)

Publication Number Publication Date
GB1445151A true GB1445151A (en) 1976-08-04

Family

ID=5854895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4028173A Expired GB1445151A (en) 1972-08-29 1973-08-24 Apparatus for determining the wall thickness of specimens such as plates or the like by ultrasonic methods

Country Status (4)

Country Link
JP (1) JPS4965855A (en)
DE (1) DE2242466C3 (en)
FR (1) FR2198153B1 (en)
GB (1) GB1445151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143036A (en) * 1983-07-08 1985-01-30 Atomic Energy Authority Uk Ultrasonic resonance for detecting changes in elastic properties

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8334394D0 (en) * 1983-12-23 1984-02-01 Czajowski S B Electrical circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143036A (en) * 1983-07-08 1985-01-30 Atomic Energy Authority Uk Ultrasonic resonance for detecting changes in elastic properties

Also Published As

Publication number Publication date
DE2242466C3 (en) 1981-01-08
FR2198153A1 (en) 1974-03-29
DE2242466A1 (en) 1974-03-07
JPS4965855A (en) 1974-06-26
FR2198153B1 (en) 1978-01-06
DE2242466B2 (en) 1980-05-14

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Legal Events

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