GB1108567A - Improvements in apparatus employing pulse echoes - Google Patents

Improvements in apparatus employing pulse echoes

Info

Publication number
GB1108567A
GB1108567A GB1845564A GB1845564A GB1108567A GB 1108567 A GB1108567 A GB 1108567A GB 1845564 A GB1845564 A GB 1845564A GB 1845564 A GB1845564 A GB 1845564A GB 1108567 A GB1108567 A GB 1108567A
Authority
GB
United Kingdom
Prior art keywords
transmitted pulses
successive
echoes
amplitude
varied
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
GB1845564A
Inventor
Thomas Graham Brown
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB1845564A priority Critical patent/GB1108567A/en
Publication of GB1108567A publication Critical patent/GB1108567A/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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/529—Gain of receiver varied automatically during pulse-recurrence period
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/56—Display arrangements
    • G01S7/62—Cathode-ray tube displays
    • G01S7/6209—Cathode-ray tube displays providing display of one measured variable
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52053—Display arrangements
    • G01S7/52057—Cathode ray tube displays
    • G01S7/52058—Cathode ray tube displays displaying one measured variable; A-scan display

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

1,108,567. Pulse-echo distance-measuring apparatus; cathode-ray tube displays. SMITH'S INDUSTRIES Ltd. 4 May, 1965 [4 May, 1964], No. 18455/64. Headings H4D and H4T. In an intensity-modulated cathode ray tube display system for use with radar, echosounding, and ultrasonic flaw-detection apparatus, the sensitivity of the apparatus is varied for successive transmitted pulses and the echoes produced from a given reflecting object by the successive transmitted pulses are displayed spaced apart on the screen. In a flawdetection embodiment, echo signals from a testpiece 9 are displayed along the horizontal timebase of a cathode ray tube 14. The gain of an amplifier 11 through which the echo signals are passed is varied for successive transmitted pulses, and successive sweeps of the trace on the tube 14 are displaced in the vertical direction to produce a display in which successive echoes from a given object are displayed above each other. Comparison of the traces at different sensitivities enables large amplitude echoes (which result in defocussing of the luminous spot of the trace at high sensitivities) to be distinguished from small-amplitude echoes of extended flaws. Voltage waveforms for controlling the gain of amplifier 11 and for displacing the trace vertically may be of staircase or sawtooth form, are synchronized with the transmitted pulses, and may be derived from generators 17 or from ganged rotary potentiometers. In various modifications, the sensitivity of the apparatus may be varied by varying the amplitude of the transmitted pulses, varying the electrical damping of the transducer system (which may have separate or combined transmitting and receiving transducers), or varying the limiting or clipping level of an echo amplitude selector.
GB1845564A 1964-05-04 1964-05-04 Improvements in apparatus employing pulse echoes Expired GB1108567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1845564A GB1108567A (en) 1964-05-04 1964-05-04 Improvements in apparatus employing pulse echoes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1845564A GB1108567A (en) 1964-05-04 1964-05-04 Improvements in apparatus employing pulse echoes

Publications (1)

Publication Number Publication Date
GB1108567A true GB1108567A (en) 1968-04-03

Family

ID=10112737

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1845564A Expired GB1108567A (en) 1964-05-04 1964-05-04 Improvements in apparatus employing pulse echoes

Country Status (1)

Country Link
GB (1) GB1108567A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012474A1 (en) * 1978-12-14 1980-06-25 Shell Internationale Researchmaatschappij B.V. Method and apparatus for ultrasonic tube inspection
WO2008003127A1 (en) 2006-07-07 2008-01-10 Signostics Pty Ltd Improved acoustic imaging method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012474A1 (en) * 1978-12-14 1980-06-25 Shell Internationale Researchmaatschappij B.V. Method and apparatus for ultrasonic tube inspection
WO2008003127A1 (en) 2006-07-07 2008-01-10 Signostics Pty Ltd Improved acoustic imaging method and apparatus
EP2044425A1 (en) * 2006-07-07 2009-04-08 Signostics Pty Ltd. Improved acoustic imaging method and apparatus
EP2044425A4 (en) * 2006-07-07 2013-05-01 Signostics Pty Ltd Improved acoustic imaging method and apparatus

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