Patent ID: 7724380
Filing Date: 2010-05-25
Classification: G06T

Abstract:
1. A three-dimensional measurement method for measuring a shape of an object in a non-contact manner, the method comprising: using a non-contact sensor for three-dimensional measurement and a sensor moving mechanism that changes a position and a posture of the non-contact sensor and that is adapted to operate by numerical control; setting, in advance, measurement path information indicating plural position and postures of the non-contact sensor to store the measurement path information in a memory; moving the non-contact sensor in accordance with the stored measurement path information indicating plural positions and postures of the sensor at the respective positions; performing, in conjunction with said moving step, preliminary three-dimensional measurement of the object with said non-contact sensor in accordance with a preset procedure automatically determined based on the measurement path information; using shape data obtained by the preliminary three-dimensional measurement and shape data of an imaginary object located at an ideal arrangement position as a measurement target at a time of setting the measurement path information in advance to detect a positioning error between the object and the imaginary object, said positioning error being an error between said ideal arrangement position and a position where the object is detected to be positioned; modifying the measurement path information depending on the detected positioning error; and performing three-dimensional measurement of the object in accordance with the modified measurement path information.