Structural deflection measurement

Details Structural deflection measurement Structural deflection measurement

1998-06-09

1999-11-02

Fuller, Benjamin R.

Measuring and testing

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

By loading of specimen

250227, 356 35, 356373, G01L 124

Patent

active

059748966

ABSTRACT:
Apparatus for the measurement of out of plane displacements of a panel of material under test comprises; a laser (2) capable of focusing a laser spot (8) onto the surface of the panel (6) of material; a line generating lens (12) for converting the image of the projected laser spot (8) into a focused line (22); and, a photo diode (16) responsive to illumination by laser light and so orientated and disposed in relation to the generated laser line (22) that the out of plane distortions of the panel (16) and resulting movement of the spot (8 to 8') produce a corresponding translation of the generated line (18) across the face of the photo diode (16) and the photo diode (16) produces a recordable output proportional to the out of plane deflection of the panel (6).

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patent: 5568259 (1996-10-01), Kamegawa
Idesawa, Masanori et al., "Scanning Moire Method and Automatic Measurement of 3-D Shapes", Applied Optics, vol. 16, No. 8, Aug. 1977, pp. 2152-2162.

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