Patent ID: 7930125
Filing Date: 2011-04-19
Classification: G01B

Abstract:
1. A system for positioning a coordinate system of a measurement machine in relation to a workpiece placed on the measurement machine, the system comprising: an element receiving module configured for receiving positioning elements in relation to the workpiece, wherein the positioning elements comprise the coordinate system of the measurement machine and feature elements which comprise a plane positioning element, an origin positioning element, and an axis positioning element, the plane positioning element being a plane, the origin positioning element being at least one point, and the axis positioning element being a plane, a point, a line, a circle, or a sphere, wherein the points, the lines, the planes, the circles, and the spheres are selected from the workpiece; a first axis vector determining module configured for determining a normal vector of a first axis of a positioned coordinate system according to a normal vector of the plane of the plane positioning element; an origin determining module configured for determining an origin of the positioned coordinate system according to an X coordinate value, a Y coordinate value, and a Z coordinate value of the at least one point of the origin positioning element; a second axis vector determining module configured for determining a normal vector of a second axis of the positioned coordinate system according to the axis positioning element, wherein if the axis positioning element is a line, the normal vector of the second axis of the positioned coordinate system is a normal vector of the line, and if the axis positioning element is a point, a plane, a circle, or a sphere, the normal vector of the second axis is a normal vector of a line composed of a center of the axis positioning element and the origin of the positioned coordinate system; a coordinate system positioning module configured for generating the positioned coordinate system according to the normal vectors of the first axis vector and the second axis, and the origin, to position the coordinate system of the measurement machine; and at least one processor that executes the elements receiving module, the first axis vector determining module, the origin determining module, the second axis vector determining module, and the coordinate system positioning module.