METHOD OF DIMENSIONAL CHECK OF LARGE-SIZED ARTICLES AND GEAR FOR ITS IMPLEMENTATION Russian patent published in 1997 - IPC

FIELD: instrumentation. SUBSTANCE: invention refers to dimensional check of trucks of railway rolling stock, in particular. According to method article is checked in rectangular system of coordinates formed from five reference lines of sight in the form of laser beams. Two mutually perpendicular reference lines are located below over-all level of checked article and two other lines are arranged above it. Upper and lower levels of reference laser beams are contiguously parallel which gives possibility to scan article along all checked surfaces. Fifth reference line is positioned vertically and forms third coordinate. Characteristic feature of invention consists in fitting of gear for implementation of method of dimensional check of large-sized article with additional mutually perpendicular distance rules 3, 4 placed in second level relative to measured object and contiguously with first pair of distance rules 1, 2 which are parallel- correlated. Checked article is positioned between levels on adjustable point supports. Vertical coordinate in this case is manufactured in the form of distance rule 26 arranged vertically and hinged to bearing support 21 for vertical adjustment and check of position by pair of horizon levels 27 anchored on distance rule 26. Distance rule 26 carries radiator of reference light beam and carriages with rotating pentaprism that forms horizontal scanning plane. EFFECT: increased accuracy and efficiency of method and gear. 2 cl, 6 dwg