METHOD OF DILATOMETRY Russian patent published in 2015 - IPC G01N25/16 G01B9/02 

FIELD: measurement equipment.

SUBSTANCE: method of dilatometry includes measurement of a speckle interferogram of a field of normal displacements with display on a PC monitor screen and determination of a displacement value on its basis. At the same time some reflecting elements of the speckle interferometer are located behind the surveyed body, illuminating and displaying the sections of its surface invisible in the front, and their recorded speckle interferograms are placed in dedicated parts of the PC monitor screen, which are not crossing with the display of the speckle interferogram of the front surface of the body. The differential speckle interferogram is calculated for displacements of surfaces respective to their initial state, and using it, they determine the change of the distance between any two points of the body surface.

EFFECT: increased information value and reliability of produced data due to provision of the possibility to simultaneously determine displacement of several sample surfaces.

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