GB1436348A - Method of and apparatus for tracking a weld line - Google Patents

Method of and apparatus for tracking a weld line

Info

Publication number
GB1436348A
GB1436348A GB2887473A GB2887473A GB1436348A GB 1436348 A GB1436348 A GB 1436348A GB 2887473 A GB2887473 A GB 2887473A GB 2887473 A GB2887473 A GB 2887473A GB 1436348 A GB1436348 A GB 1436348A
Authority
GB
United Kingdom
Prior art keywords
weld
tracker
secondary coils
tracking
differenced
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
GB2887473A
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB2887473A priority Critical patent/GB1436348A/en
Publication of GB1436348A publication Critical patent/GB1436348A/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
    • G01N29/24—Probes
    • G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
    • 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
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • 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
    • G01N2291/267—Welds
    • G01N2291/2675—Seam, butt welding

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)
  • Electromagnetism (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

1436348 Automatic control of position BRITISH STEEL CORP 14 June 1974 [18 June 1973] 28874/73 Heading G3R [Also in Division G1] In automatic weld tracking apparatus, a weld detector includes two secondary coils, whose outputs are differenced to form a tracking control, and an energized primary coil that surrounds the secondary coils. As shown, a weld tracker 1 is used to position ultrasonic probes 7, 8 relative to a weld 4 on metal tube 5. The tracker includes a primary coil energized from oscillator 26, and two secondary coils (see Fig. 3 not shown). The output of the secondary coils, which are dependent upon the position of the coils relative to the weld, are differenced by a bridge circuit 27 and compared at 29 with the phase shifted oscillator output from gate-pulse shaper 31. Any difference is averaged by amplifier 32 and used to control a pneumatic valve 34 for air motor 36, that moves the tracker 1 so that it follows the weld. Details of the tracker and its support mechanism are given on Figs. 2 and 3 (not shown).
GB2887473A 1973-06-18 1973-06-18 Method of and apparatus for tracking a weld line Expired GB1436348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2887473A GB1436348A (en) 1973-06-18 1973-06-18 Method of and apparatus for tracking a weld line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2887473A GB1436348A (en) 1973-06-18 1973-06-18 Method of and apparatus for tracking a weld line

Publications (1)

Publication Number Publication Date
GB1436348A true GB1436348A (en) 1976-05-19

Family

ID=10282559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2887473A Expired GB1436348A (en) 1973-06-18 1973-06-18 Method of and apparatus for tracking a weld line

Country Status (1)

Country Link
GB (1) GB1436348A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124792A (en) * 1977-07-25 1978-11-07 The United States Of America As Represented By The Secretary Of The Army Eddy current probe subsystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124792A (en) * 1977-07-25 1978-11-07 The United States Of America As Represented By The Secretary Of The Army Eddy current probe subsystem

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Legal Events

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