Patent ID: 6722049
Filing Date: 2004-04-20
Classification: G01C

Abstract:
Inclination measurement apparatus for mounting on a measured surface for measuring an inclination of the measured surface in an inclination measurement plane with respect to a desired measurement axis, the apparatus comprising:(a) an indexable turntable bearing a clinometer; (b) a mounting that can be mounted on the measured surface and which in turn mounts said turntable so that said turntable is rotatable in a single plane that is perpendicular to the inclination measurement plane between a pair of precisely reproducible diametrically opposite orientations with respect to the desired measurement axis for respectively issuing inclination measurements V0 and V180 responsive to the inclination of the surface in the inclination measurement plane with respect to the desired measurement axis; and (c) a controller for calculating a bias corrected inclination measurement Vreal of the inclination of the surface with respect to the desired measurement axis from an inclination measurement V0 and V180.