RAIL STRAIGHTNESS CHECKER Russian patent published in 2006 - IPC B61K9/08 G01B15/04 

FIELD: railway transport; measuring facilities.

SUBSTANCE: invention can be used for processing signals at noncontact measuring of deflection of rails from straight line in one or several planes. Proposed rail straightness checker contains mechanical part for fastening measuring pickups, mechanism to shaft rail through check zone, track impulse pickups at input and output of measuring set, at least three radio frequency pickups for noncontact measurement of distance to rail surface in each plane under checking, markers for automatic discarding of products, operation unit and evaluation unit consisting of spline factor calculation unit, local profile evaluation unit, first storage unit, first, second and third subtracrtion units, first, second and third summers, second storage unit, averging unit, third storage unit, local sag evaluation unit and fourth storage unit interconnected in corresponding manner.

EFFECT: provision of reliable results of evaluation of longitudinal profile of rail and local sags relative to base on any preset length, including end sections.

1 tbl, 7 dwg