Light pen type portable three dimensional coordinates measuring system

Abstract

This invention relates to an optical measuring technique of three-dimensional coordinates. The measuring system of optical pen-style portable three-dimensional coordinates comprises CCD camera, computer and optical pen used as measurement sensing part. There install three optical targets in the pen and a ball probe on the pen point. The centers of the three optical targets and the ball probe lie in the same line. The optical targets are obtained by the camera, which sends the image to computer, thus realizes the three-dimensional coordinates measuring of contact points through computer. The advantage of this invention lies in that it can flexibly adjust the camera position according to the traits of the object to be measured and facilitate the application on spot and increase the flexibility of the system.

Description

technical field [0001] The invention belongs to test and measurement technology and instruments, and in particular relates to the measurement technology of three-dimensional coordinates by using an optical method. technical background [0002] As a practical precision measuring instrument, the three-dimensional coordinate measuring device is widely used in various fields such as machinery, electronics, mold and aerospace. However, most of the current three-dimensional coordinate measuring devices are based on the Cartesian coordinate system. It has a fixed worktable, three mutually perpendicular motion axes and scales, etc. For the three-dimensional coordinate machine used in the field of workpiece processing, the production of its linear guide rail and long scale is relatively complicated. Its base, worktable, column and guide rail are usually made of metal, granite or ceramics. A three-coordinate The total weight of the measuring machine is s...

AI Technical Summary

Problems solved by technology

However, the installation, positioning and calibration of this type of detection device are relatively complicated. After being installed and positioned, it is suitable for batch detection of the same workpiece, but it is not suitable for single-piece measurement on the construction site.

For example, it is necessary to measure the relative position of the aircraft wing. At this time, it is impossible to move the huge and heavy wing to a three-dimensional coordinate measuring machine for detection. The current method can only build a special coordinate system on the engineering site.

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