Light pen type portable three dimensional coordinates measuring system

A technology of three-dimensional coordinates and measurement system, applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as inappropriateness, inability to detect wings, complicated installation positioning and calibration, etc., and achieve the effect of enhancing flexibility and facilitating on-site use

Inactive Publication Date: 2005-01-26
TIANJIN UNIV
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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.

Method used

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  • Light pen type portable three dimensional coordinates measuring system
  • Light pen type portable three dimensional coordinates measuring system
  • Light pen type portable three dimensional coordinates measuring system

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Embodiment Construction

[0016] A portable three-dimensional coordinate measuring system is composed of a CCD camera 1, a computer 2 and a light pen 3. For the present embodiment, the light pen 3 adopts carbon fiber material to make a cylinder with a length of about 500mm, and a battery box 5 is arranged inside it, and three light targets are adopted on the light pen, and are installed according to the position shown in Fig. 3 . that is, figure 2 Points B, C, and D shown in . In this embodiment, light-emitting diodes are used as light targets, and the diodes are connected in series and powered by the power supply 5 . Light pen measuring head 4 adjusts the center of the light target and the center of the measuring head to be on a straight line during installation. The CCD camera 1, the computer 2 and the image acquisition card inserted in the computer form an image acquisition system, and the image acquisition system is pre-calibrated one-time and accurately before measurement. When measuring, the m...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/03G01B21/04
Inventor 刘书桂彭凯黄风山李蓬
Owner TIANJIN UNIV
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