Coordinate measuring apparatus and method for measuring an object
AssigneeWerth Messtechnik GmbH
InventorsRalf Christoph, Wolfgang Rauh
Life of this patent
Estimating the term…
Abstract
The invention relates to a coordinate measuring apparatus (110) for measuring an object (3), comprising an x-ray sensory mechanism as a first sensory mechanism that is provided with an x-ray source (10) and at least one x-ray sensor (7) which detects the x-rays, and a second sensory mechanism such as a tactile and/or an optical sensory mechanism (8, 11; 9) that can be placed in the x, y, and/or z direction of the coordinate measuring apparatus in relation to the object. In order to be able to easily measure also large-size test objects, the x-ray sensory mechanism (7, 10) can be positioned in the coordinate measuring apparatus (10) according to the second sensory mechanism (8, 11; 9).
Claims73
A multisensor coordinate measuring device for measuring points on a surface of a workpiece, said device comprising:
- an x-ray computer tomography sensor system as a first sensor system for acquiring three-dimensional datasets of said workpiece, and comprising an x-ray source and at least one x-ray sensor;
- and
- a tactile and/or optical sensor system as a second sensor system, integrated within the multisensor coordinate measuring device and movable relative to the workpiece in x-, y- and/or z-direction;
- wherein the first sensor system and the second sensor system measure the points on the surface of the workpiece by using a common coordinate system;
- wherein the x-ray and tactile and/or optical sensor systems are movable relative to each other and to the workpiece;
- and
- wherein the workpiece is rotatable 360° relative to the x-ray system about a rotation axis that is perpendicular to the measuring beam direction of the x-ray computer tomography sensor system;
- and
- wherein for the measuring of the workpiece, n-sensors simultaneously struck by x-rays are assigned to the x-ray source, and wherein the x-ray source is adjusted between consecutively performed measurements relative to the workpiece at a base angle α, and wherein sensors arranged one after the other are aligned, twisted, or tilted relative to each other at an angle α/n.
A multisensor coordinate measuring device for measuring points on a surface of a workpiece, said device comprising:
- an x-ray computer tomography sensor system as a first sensor system for acquiring three-dimensional datasets of said workpiece, and comprising an x-ray source and at least one x-ray sensor;
- and
- a tactile and/or optical sensor system as a second sensor system, integrated within the multisensor coordinate measuring device and movable relative to the workpiece in x-, y- and/or z-direction;
- wherein the first sensor system and the second sensor system measure the points on the surface of the workpiece by using a common coordinate system;
- wherein the x-ray and tactile and/or optical sensor systems are movable relative to each other and to the workpiece;
- wherein the workpiece is rotatable 360° relative to the x-ray system about a rotation axis that is perpendicular to the measuring beam direction of the x-ray computer tomography sensor system;
- wherein marked points on the surface of the workpiece to be measured are measured with a tactile or optical sensor system and geometrical features are ascertained for calibrating the x-ray sensor system;
- and
- wherein the measurement results obtained through the tactile and/or optical sensor system are used for correction of a measured point cloud generated from 3D-voxel-data, said measured point cloud being generated by threshold methods and the 3D-voxel-data resulting from the measuring with the x-ray sensor system.
Dependencies are inferred from the claim text.