Three-dimensional point coordinate measuring method and measuring apparatus thereof

Abstract

The invention relates to a three-dimensional point coordinate measuring method and a measuring apparatus thereof. According to the invention, the problems on the flexibility of the system and the measuring speed are solved; therefore, the field measurement and the measurement of points that are not easy to be measured can be allowed, and the manufacturing cost can be reduced. According to the scheme of the method, a camera coordinate system is established; three-dimensional coordinates of marking points are calibrated in a light pen coordinate system, wherein the marking points are fixed on a measuring probe; spatial three-dimensional coordinates of implementation measuring time of a set of fixed marking points on the measuring probe are calculated in the camera coordinate system, and three-dimensional coordinates of the set of fixed marking points on the measuring probe are also calculated in a measuring probe coordinate system; and a logical relation of the two coordinate systems of the implementation measuring time is established; a three-dimensional coordinate of a spherical point of a spherical measuring head is calibrated in the measuring probe coordinate system; based on the above results, when the measuring is carried out, a spherical measuring head in the front of the measuring probe is contacted with a measured point to obtain a measuring point, and a coordinate of the measuring point is calculated. The measuring apparatus comprises supports, cameras, a measuring probe, a matched computer and matched software. The apparatus has two cameras, which are fixed on supports. The spherical measuring head is fixed at the front of a T-shaped rod, and a set of marking points, which are in a T-shaped form, are fixed on the T-shaped rod. According to the invention, the system has good flexibility, and the measuring speed is fast; besides, the measurement of a measuring point that is not easy to be measured is also allowed, and the cost is low.

Description

technical field [0001] The invention belongs to the field of precision measurement and organically combines two methods of contact measurement and non-contact measurement, in particular a measurement probe and a portable three-dimensional coordinate measurement method and a measurement device which can move arbitrarily. Background technique [0002] The three-coordinate measuring machine has been very mature. According to the current development of measuring equipment, according to the usual classification, the measurement system can be divided into three-coordinate measurement system, flexible three-coordinate measurement system and three-dimensional laser scanning measurement system, optical photo scanning The structured light scanning measurement system represented by the measurement system and the like. The measurement technology of the contact three-coordinate measurement system is very mature. Even today, the three-dimensional measurement method of structured light sca...

AI Technical Summary

Problems solved by technology

Effectively overcome the shortcomings of the current three-coordinate measuring machine, such as low flexibility, high cost, non-contact scanners that cannot detect shading parts such as inner surfaces, and can measure a certain point independently

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