WO1991017414A3 - Non-destructive structural evaluation - Google Patents

Non-destructive structural evaluation Download PDF

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Publication number
WO1991017414A3
WO1991017414A3 PCT/GB1991/000722 GB9100722W WO9117414A3 WO 1991017414 A3 WO1991017414 A3 WO 1991017414A3 GB 9100722 W GB9100722 W GB 9100722W WO 9117414 A3 WO9117414 A3 WO 9117414A3
Authority
WO
WIPO (PCT)
Prior art keywords
excitation
detector
passed
structural evaluation
reference signal
Prior art date
Application number
PCT/GB1991/000722
Other languages
French (fr)
Other versions
WO1991017414A2 (en
Inventor
Alexander Keith Mackenzie
William Murphy Cummings
Original Assignee
Secretary Trade Ind Brit
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 Secretary Trade Ind Brit filed Critical Secretary Trade Ind Brit
Publication of WO1991017414A2 publication Critical patent/WO1991017414A2/en
Publication of WO1991017414A3 publication Critical patent/WO1991017414A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons
    • G01L1/255—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons using acoustic waves, or acoustic emission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Toxicology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

Excitation is applied to a structure (2) and infrared radiation (5) emitted by the structure (2) passes through a telescope (3), scanning system (30) and focussing optics (40). The signal is then detected by an IR detector (24). The output from the detector (24) is passed to a computer system (17). A reference signal (22) is derived from a strain gauge (4) and is passed to the computer (17). The reference signal has frequency, amplitude and phase content which is characteristic of the excitation and so provides a basis for noise rejection by correlation.
PCT/GB1991/000722 1990-05-09 1991-05-07 Non-destructive structural evaluation WO1991017414A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909010444A GB9010444D0 (en) 1990-05-09 1990-05-09 Non-destructive evaluation
GB9010444.9 1990-05-09

Publications (2)

Publication Number Publication Date
WO1991017414A2 WO1991017414A2 (en) 1991-11-14
WO1991017414A3 true WO1991017414A3 (en) 1992-01-09

Family

ID=10675729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/000722 WO1991017414A2 (en) 1990-05-09 1991-05-07 Non-destructive structural evaluation

Country Status (3)

Country Link
AU (1) AU7799591A (en)
GB (1) GB9010444D0 (en)
WO (1) WO1991017414A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979001156A1 (en) * 1978-05-31 1979-12-27 Sira Institute Apparatus and method for indicating stress in an object
WO1982000891A1 (en) * 1980-09-01 1982-03-18 Busse G Method and device for structural superficial and deep analysis of a body
EP0150384A2 (en) * 1984-01-23 1985-08-07 International Business Machines Corporation Thermal wave imaging
EP0345641A2 (en) * 1988-06-08 1989-12-13 Deere & Company Device for analysing the stress of an object
JPH06129735A (en) * 1992-10-16 1994-05-13 Toshiba Corp Method of exchanging cooling device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979001156A1 (en) * 1978-05-31 1979-12-27 Sira Institute Apparatus and method for indicating stress in an object
WO1982000891A1 (en) * 1980-09-01 1982-03-18 Busse G Method and device for structural superficial and deep analysis of a body
EP0150384A2 (en) * 1984-01-23 1985-08-07 International Business Machines Corporation Thermal wave imaging
EP0345641A2 (en) * 1988-06-08 1989-12-13 Deere & Company Device for analysing the stress of an object
JPH06129735A (en) * 1992-10-16 1994-05-13 Toshiba Corp Method of exchanging cooling device

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
American Society of Mechanical Engineers Symposia Series, volume 98, 1989, Kohles et al.: "Differential infrared thermography: a correlation with stress and strain in cortical bone", pages 81-84, see page 82, paragraph 2 - page 83, paragraph 2; figures 2,3 *
Journal of Nondestructive Evaluation, volume 8, no. 2, June 1989 (New York, US), Kuo et al.: "Synchronous thermal wave IR video imaging for nondestructive evaluation", pages 97-106, see page 98, column 2, paragraphs 1-2; page 99, column 1, paragraph 2 *
Patent Abstracts of Japan, volume 10, no. 183 (P-472)[2239] 26 June 1986, & JP, A, 6129735 (JEOL LTD) 10 February 1986, see the whole abstract *
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, volume 10, no. 3/4, 1988 (New Orleans, Louisiana, US) Matsuda et al.: "Computer processing for quantitative medical thermography", pages 1129-1130, see page 129, column 1, paragraph 3 - column 2, paragraph 2; figures 1,2 *

Also Published As

Publication number Publication date
WO1991017414A2 (en) 1991-11-14
AU7799591A (en) 1991-11-27
GB9010444D0 (en) 1990-06-27

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