Method and apparatus for calibration of laser three-dimensional measuring appliance

Abstract

The invention discloses a method and apparatus for calibration of laser three-dimensional measuring appliance, wherein the apparatus includes a base plane and a laser gauge pin arranged on base planeand able to set out a lasing plane, an aligning gear arranged on base plane, which includes a surface gauge, an adjusting plane is arranged on the surface gauge, and the correction method is, the laser gauge pin sending laser plane, projecting on the plane gauge, then the laser gauge pin can sense the reflected ray, and obtain a two-dimensional digital image.

Description

technical field [0001] The present invention relates to a calibration method and device for a three-dimensional optical measuring system, in particular to a method and device for calibrating a laser three-dimensional measuring device. Background technique [0002] Existing optical triangulation systems have been widely used in various 3D space measurement systems, such as machine vision, automated inspection, or in various manufacturing and assembly processes; however, these 3D measurement systems have advantages and disadvantages. Often depends on the calibration accuracy of the system. Therefore, how to design a set of calibration procedures and methods with simple procedures and high accuracy for the 3D measurement system is indeed an important issue. [0003] Generally, extra expenditure is required to manufacture a calibration instrument for a three-dimensional measurement system, and for a system requiring high precision, the required calibration cost is not only high...

AI Technical Summary

Problems solved by technology

[0008] However, the above calibration method and device are designed for the calibration of laser measuring heads that generally use single-point scanning, but are not applicable to laser measuring heads such as the present invention or having single-line scanning characteristics

And because the laser line in this case is obliquely projected onto the plane on the block, the reflection conditions of the plane (such as the smoothness of the surface) will easily affect its correction accuracy, so this method still needs to be properly corrected. At the same time, the above-mentioned oblique In general, the laser measuring head needs to be suspended and placed in the projection mode, which will not be conducive to the calibration of some heavy and large laser measuring heads, such as body scanners (Body Scanner), etc.

[0009] In addition, as in the aforementioned U.S. Patent No. 4,825,308, the calibration device must use a very high-precision XYZ linear platform and a square gauge, especially the positioning accuracy and verticality of the X, Y, and Z axes must be very high, so the equipment volume Larger and more expensive

Images