Apparatus for measuring the deformation of an object subjected t

Details Apparatus for measuring the deformation of an object subjected t Apparatus for measuring the deformation of an object subjected t

1989-12-29

1991-02-12

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

356 32, G01L 500

Patent

active

049914456

ABSTRACT:
The deformations of an object subjected to stresses are measured, said object being, for example, an inertia wheel revolving at high speed inside a vacuum chamber, light pulses emitted by a stroboscope and synchronized with the rotation speed of the object are directed onto this object. The still frames or freezes thus formed are issued from the chamber through a circular aperture via a first large focal length objective. On the full scale real images thus obtained within a plane, a reticule is superimposed and the images of the object and of the reticule are increased by means of a second objective. A video camera connected to a screen and a recorder makes it possible to directly display and/or store the images of the deformations sustained by the object.

REFERENCES:
patent: 3383980 (1968-05-01), Richter
patent: 3985444 (1976-10-01), Takashima et al.
FR-A-816 087 (EPARVIER et al.), p. 1, lignes 32-42; p. 4, ligne 3, p. 5, ligne 56; Figures.
Patent Abstracts of Japan, vol. 10, No. 30, (P-426)[2087], 5 fevrier 1986; and JP-A-60 181 604, (Toyoda Gosei K.K.) 17-09-1985, Resume Strength of Materials, vol. 7, No. 9, Sep. 1975, pp. 1147-1148, Plenum Ostapchuk: "A Device for Measuring the Rim Displacement of Turbine Rotors".
DE-a-2 636 429 (Fraunhofer) En entier.
Patent Abstracts of Japan, vol. 7, No. 150, (P-207)[1295], 30 juin 1983 and JP-A-58 62 504 (Oputo Kugiyou K.K.) 14-04-1983.
Patent Abstracts of Japan, vol. 11, No. 126 (P-569)[2573], 21 avril 1987 and JP-A-61 269 005 (Science & Tech. Agency) 28-11-1986 resume.

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