GB1221535A - Improvements relating to the vibration analysis of materials - Google Patents

Improvements relating to the vibration analysis of materials

Info

Publication number
GB1221535A
GB1221535A GB2473568A GB2473568A GB1221535A GB 1221535 A GB1221535 A GB 1221535A GB 2473568 A GB2473568 A GB 2473568A GB 2473568 A GB2473568 A GB 2473568A GB 1221535 A GB1221535 A GB 1221535A
Authority
GB
United Kingdom
Prior art keywords
vibrating
stationary
vibrations
materials
displacement
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
GB2473568A
Inventor
Peter John Spicer
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 Aircraft Corp Ltd
Original Assignee
British Aircraft Corp Ltd
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 Aircraft Corp Ltd filed Critical British Aircraft Corp Ltd
Priority to GB2473568A priority Critical patent/GB1221535A/en
Publication of GB1221535A publication Critical patent/GB1221535A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

1,221,535. Optical apparatus. BRITISH AIRCRAFT CORP. Ltd. May 23, 1969 [May 23, 1968], No. 24735/68. Heading G2J. Vibrations of a surface are analysed by projecting a collimated light beam on to a parallelsided glass slab 10 to produce a linear array of fringes which are projected in a first predetermined direction on to the surface 12 when it is stationary, the surface being viewed from a second direction non-parallel with the first direction such that when the surface 12 is vibrated the position of each element in the viewing plane is shifted by an amount proportional to the displacement of the portion of the surface initially occupied by the element, and comparing the position of each element at a particular instant during the vibrations with the position of the element when the surface is stationary to obtain the profile of the vibrating surface at that instant. A photograph may be taken of the stationary and a vibrating pattern to provide correlation. If desired a reference surface 13 may be used. The surface 12 may be stroboscopically illuminated using a disc 15, the illumination being adjusted such that the vibrating surface is frozen at its maximum displacement. The light may come from a laser 11. Alternatively a highspeed camera (e. g. 100 frames/sec) films the vibrating surface.
GB2473568A 1968-05-23 1968-05-23 Improvements relating to the vibration analysis of materials Expired GB1221535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2473568A GB1221535A (en) 1968-05-23 1968-05-23 Improvements relating to the vibration analysis of materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2473568A GB1221535A (en) 1968-05-23 1968-05-23 Improvements relating to the vibration analysis of materials

Publications (1)

Publication Number Publication Date
GB1221535A true GB1221535A (en) 1971-02-03

Family

ID=10216433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2473568A Expired GB1221535A (en) 1968-05-23 1968-05-23 Improvements relating to the vibration analysis of materials

Country Status (1)

Country Link
GB (1) GB1221535A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125025A (en) * 1976-01-21 1978-11-14 Fuji Photo Optical Co., Ltd. Instrument for measuring the amplitude of vibration of a vibrating object
WO2019162234A1 (en) * 2018-02-20 2019-08-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Devices and method for vibration analysis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125025A (en) * 1976-01-21 1978-11-14 Fuji Photo Optical Co., Ltd. Instrument for measuring the amplitude of vibration of a vibrating object
WO2019162234A1 (en) * 2018-02-20 2019-08-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Devices and method for vibration analysis
JP2021514470A (en) * 2018-02-20 2021-06-10 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン Devices and methods for vibration analysis

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