FR2361646A1 - Control head for continuous ultrasonic monitoring of strip - using pulse echo method with Lamb waves - Google Patents

Control head for continuous ultrasonic monitoring of strip - using pulse echo method with Lamb waves

Info

Publication number
FR2361646A1
FR2361646A1 FR7724707A FR7724707A FR2361646A1 FR 2361646 A1 FR2361646 A1 FR 2361646A1 FR 7724707 A FR7724707 A FR 7724707A FR 7724707 A FR7724707 A FR 7724707A FR 2361646 A1 FR2361646 A1 FR 2361646A1
Authority
FR
France
Prior art keywords
control head
echo method
strip
ultrasonic monitoring
continuous ultrasonic
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Withdrawn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
FR7724707A
Other languages
French (fr)
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.)
Thyssen Niederrhein AG
Original Assignee
Thyssen Niederrhein 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
Priority claimed from DE19767625312 external-priority patent/DE7625312U/en
Application filed by Thyssen Niederrhein AG filed Critical Thyssen Niederrhein AG
Publication of FR2361646A1 publication Critical patent/FR2361646A1/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Withdrawn legal-status Critical Current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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • 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
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
    • 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
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0427—Flexural waves, plate waves, e.g. Lamb waves, tuning fork, cantilever
    • 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
    • G01N2291/10—Number of transducers
    • G01N2291/102—Number of transducers one emitter, one receiver

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

Control head for continuous ultrasonic monitoring of a rolled strip by a pulse-echo method with Lamb waves comprises two adjacent water-filled chambers for transmitter and receiver each consisting of two parallel plates connected by a housing element which covers the open side of the chambers except for a coupling aperture. An air gap between the adjacent plates is bridged on the side of the rolled strip by a crossbar. The coupling apertures are covered with plastic panels which cause attenuation of ultrasound 4 dB and speed of propagation of sound 2400 m/sec. The plastic panels are acoustically insulated by rubberised fabric from the crossbar, the parallel plates and the housing element.
FR7724707A 1976-08-12 1977-08-11 Control head for continuous ultrasonic monitoring of strip - using pulse echo method with Lamb waves Withdrawn FR2361646A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19767625312 DE7625312U (en) 1976-08-12 Test head for continuous ultrasonic testing of rolled strip using the pulse echo method with Lamb waves

Publications (1)

Publication Number Publication Date
FR2361646A1 true FR2361646A1 (en) 1978-03-10

Family

ID=6668248

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724707A Withdrawn FR2361646A1 (en) 1976-08-12 1977-08-11 Control head for continuous ultrasonic monitoring of strip - using pulse echo method with Lamb waves

Country Status (3)

Country Link
JP (1) JPS5321979A (en)
FR (1) FR2361646A1 (en)
IT (1) IT1085651B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5879259U (en) * 1981-11-24 1983-05-28 新日本製鐵株式会社 Ultrasonic probe device

Also Published As

Publication number Publication date
JPS5321979A (en) 1978-02-28
IT1085651B (en) 1985-05-28

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Legal Events

Date Code Title Description
ST Notification of lapse