METHOD FOR DETERMINING STANDARD COORDINATE MODEL OF RAILROAD TRACK AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2006 - IPC G06T17/50 

FIELD: metrological equipment for navigational systems of railroad transport.

SUBSTANCE: in accordance to method, working sides of railroad track are coordinated with given stationing interval by means of measuring-computing complex mounted on moving object. Measuring-computing complex includes rover, gyroscopic indicator of Euler angles, indicators of track and width of track, controller, personal computer. To provide unity of measurements on railroad main, single three-dimensional orthogonal system of coordinates is used in special projection. Abscissa axis on the surface of Earth ellipsoid is combined with geodesic line, coinciding with main direction of railroad main. As ordinates, geometrical perpendiculars to abscissa axis are used. Coordinates system base consists of system of temporary base stations of satellite radio-navigation system. Satellite radio-navigation system stations are positioned along the railroad with 50-100km intervals for the time of movement of measuring-computing complex. Continuous synchronous recording of indications of all devices and satellite receivers of base stations is performed. Coordinate models of railroad track having no substantial distortions of angles and distances are taken as standard. For compensating systematic errors, indications of Euler angle indicator on measuring-computer complex are smoothed by sliding average filter on sliding interval, equal to length of wheel circle of moving object. Corrections for inclination of antenna are introduced to satellite coordinates of receipt of rover of measuring-computing complex. Indications of course track indicator are calibrated by means of center-affine transformations, converting to series of directional angles and scaled horizontal projections. Joint estimation of complex measurements and parameters of statistic model is performed by means of recurrent generalized method of least squares.

EFFECT: increased precision when determining standard coordinate model.

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