MOTION MEASUREMENT SENSOR IN CRACK ACTIVITY Russian patent published in 2010 - IPC G01B5/30 

FIELD: construction.

SUBSTANCE: sensor consists of the main plate and slider inserted in it, with scales applied on them with division value of 1.0 (on plate) and 0.9 or 1.9 mm (on slider) adhered onto parts of investigated surface separated by crack with the help of double-sided foam Scotch tape, so that axes of plate slots and slider coincide and are perpendicular to crack route. At the same time slots are arranged with maximum possible length and provide for freedom of slider motion in plate in rectilinear condition and without clamp in two directions, as well as fixation of rotation and displacement of one part of structure relative to the other one both along and across the crack, for this purpose sensor is equipped with additional scales to form two pairs of vertical and horizontal scales, providing for removal of two counts in each direction.

EFFECT: invention makes it possible to measure flat displacement of crack coasts in two directions at higher validity and accuracy of measurement results.

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