CN201191178Y

CN201191178Y - Face structure light scanning apparatus

Info

Publication number: CN201191178Y
Application number: CNU200720085452XU
Authority: CN
Inventors: 王从军; 周钢; 李中伟; 朱本璋; 李晓宁; 杨彪; 杜俊贤
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2007-06-25
Filing date: 2007-06-25
Publication date: 2009-02-04
Anticipated expiration: 2017-06-25

Abstract

The utility model discloses a surface structure light scanning device, comprising a left CCD camera, a right CCD camera and a projector, wherein the projector is in a frame, two ends of a mounting frame are provided with a left and a right continuous manger symmetrically, the middle of the mounting frame is provided with a through hole, the bottoms of the left and the right continuous mangers are both provided with two step holes, the left CCD camera is fixedly connected with a left fixing block and is arranged in the two step holes of the left continuous manger via a first and a second screws, the right CCD camera is fixedly connected with the right fixing block and is arranged in the two step holes of the right continuous manger via a third and a fourth screws, the step holes are fit with the screws. The utility model utilizes a modularized mounting frame, having stable and compact structure, simple installment and detachment, adjustable measurement range, high measurement speed, much collected data, large measurement area, high measurement accuracy, the application for reverse engineering and precision measurement and portable property for on-site measurement.

Description

A kind of face structure light scanning apparatus

Technical field

The utility model relates to a kind of surveying instrument of reverse-engineering, is specifically related to a kind of face structure light scanning apparatus that is used for reverse-engineering.

Background technology

Reverse-engineering plays an important role in shortening product design cycle, digestion advanced technology both domestic and external and product.The quality of reverse-engineering measuring equipment directly has influence on accurate, the integrated degree that tested entity is described, and then has influence on the CAD curved surface of reconstruct, the quality of solid model, is the basis of reverse-engineering.

At present, mainly contain following four kinds at the most widely used measuring equipment in reverse engineer field: contact coordinate measuring set, 3 D laser scanning measurement mechanism, flexible three-dimensional coordinates measurement device, raster scanning measurement mechanism.The three-dimensional coordinates measurement measurement device technology of contact and 3 D laser scanning measuring technique and grating measuring instrument be comparative maturity, and they to a certain extent can the march planar survey, but also has the following disadvantages respectively:

The three coordinate measuring machine precision height of contact, but a point can only be measured at every turn, measuring speed is slow, is difficult to carry out the curved surface shape-designing, can't measure soft object, and it is more loaded down with trivial details to operate.

The 3 D laser scanning measuring instrument is bulky, needs bigger platform, and precision, speed are restricted, and measurement range also is limited by the platform size of measuring instrument.

The grating style three-dimension measuring instrument adopts grating as light source, and measuring speed is fast, but measuring method is subjected to the restriction of color of object surface, not energy measurement black object and reflective object.

Summary of the invention

The purpose of this utility model is to provide a kind of face structure light scanning apparatus, and this scanister has that measuring speed is fast, precision is high, sweep limit is wide and portable advantage.

A kind of face structure light scanning apparatus that the utility model provides is characterized in that: this device comprises left CCD camera, right CCD camera and projector; Projector is positioned at framework; The erecting frame two ends have the left and right groove of symmetry, the middle part is provided with through hole, above-mentioned left and right groove bottom all has two shoulder holes, and left CCD camera is fixedlyed connected with left fixed block, and is installed in by first, second screw in two shoulder holes of left groove of erecting frame; Right CCD camera and right fixed block fixedly link, and are installed in by the 3rd, the 4th screw in two shoulder holes of right groove of erecting frame; Described shoulder hole matches with first, second screw and the 3rd, the 4th screw respectively.

The principal feature of the utility model face structure light scanning apparatus is: (1) utilizes modular erecting frame, the Stability Analysis of Structures compactness, and convenient the installation and unloading, and can adjust its measurement range.(2) measuring speed is fast, adopts advanced structured light face scanning technique, and the single acquisition time can only need 1 second.(3) image data is many, and the single acquisition data can reach more than 1,000,000.(4) survey area is big, and the single acquisition area can reach 400mm * 320mm.(5) measuring accuracy height, the single measurement precision can reach 0.05mm～0.02mm, can satisfy the needs of reverse-engineering and accuracy detection.(6) good portability can be convenient for carrying measure field, finishes measurement whenever and wherever possible.

Description of drawings

Fig. 1 is the front view of the utility model face structure light scanning apparatus;

Fig. 2 is the vertical view of the utility model face structure light scanning apparatus;

Fig. 3 is the front view of the right groove part of erecting frame;

Fig. 4 is the vertical view of the right groove part of erecting frame;

Fig. 5 is the use synoptic diagram of the utility model scanister.

Embodiment

With example the utility model is described in further detail with reference to the accompanying drawings below.

As shown in Figure 1 and Figure 2, the utility model face structure light scanning apparatus comprises left CCD camera 2, right CCD camera 3 and projector 8.

Framework 1 adopts hollow structure, and projector 14 is positioned at framework 1, and framework 1 bottom links to each other with tripod 14.

Erecting frame 4 two ends have groove, and the right and left groove is a symmetrical structure, and the middle part is provided with through hole 9.

Left side CCD camera 2 is fixedlyed connected with left fixed block 5, and is installed in the left groove of erecting frame 4 by first, second screw 10,11.Right CCD camera 3 and right fixed block 6 fixedly link, and are installed in the right groove of erecting frame 4 by the 3rd, the

4th screw

12,13.

Shown in Fig. 3,4, the left and right grooves of erecting frame 4 bottom all has two shoulder holes with screw fit, and in right groove, the 3rd screw 12 cooperates with shoulder hole 15, and the 4th screw 13 cooperates with shoulder hole 16.First screw 10 and the 4th screw 13 can be along self axle center rotations, and second screw 11 and the 3rd screw 12 can be center of circle rotation with first screw 10, the 4th screw 13 respectively, and the anglec of rotation is by the radian decision of shoulder hole 16.The radian of shoulder hole 16 is determined according to the size of object to be measured.Can guarantee that so left fixed block 5 and right fixed block 6 all can rotate a certain angle on the plane that is parallel to erecting frame 4, thereby guarantee the adjustable angle of left CCD camera 2 and right CCD camera 3.Erecting frame 4 is connected with framework 1, and through hole 9 perpendicular projection of the light source of the projector 8 in the framework 1 by erecting frame 4 go out.

As shown in Figure 5, be the use synoptic diagram of the utility model scanister, form by portable tripod 14 and structured light scanner head.Scanner head links to each other with tripod.By translation and the rotation of tripod on all directions, the drive scanner head moves and rotates.Scanner head can be done 360 ° in the horizontal direction and rotate freely, and also certain anglec of rotation can be arranged in vertical direction.

When using portable area-structure light measurement mechanism Measuring Object, at first guarantee that by mobile tripod 14 measuring head moves to certain pose in the space, under control of computer software, the mesopore 9 that the projection light source that projector 8 projects sees through erecting frame 4 is projected to the testee surface, two

CCD cameras

2,3 are taken one group of photo synchronously about using then, and the structural parameters of last photo according to shooting, structured light scanning survey head and the inside and outside parameter of two CCD cameras calculate the three dimensional point cloud on testee surface.If testee is bigger, measuring head can be moved to the three dimensional point cloud at another other positions of pose measurement testee in the tripod measurement space, and measurement data is transformed under the same base coordinate system for several times; So repeatedly, just can record the three dimensional point cloud of whole testee under same base coordinate system.

Below schematically invention and embodiment thereof are described, this description does not have limitation, and shown in the accompanying drawing also is one of embodiment of the present utility model.So; if those of ordinary skill in the art is enlightened by it; under the situation that does not break away from the utility model creation aim; adopt the same base part of other form or each component layouts mode of other form; without creationary technical scheme similar and the embodiment of designing, all should belong to protection domain of the present utility model to this technical scheme.

Claims

1, a kind of face structure light scanning apparatus is characterized in that: this device comprises left CCD camera (2), right CCD camera (3) and projector (8);

Projector (14) is positioned at framework (1); Erecting frame (4) two ends have the left and right groove of symmetry, the middle part is provided with through hole (9), above-mentioned left and right groove bottom all has two shoulder holes, left side CCD camera (2) is fixedlyed connected with left fixed block (5), and is installed in by first, second screw (10,11) in two shoulder holes of left groove of erecting frame (4); Right CCD camera (3) and right fixed block (6) fixedly link, and are installed in by the 3rd, the 4th screw (12,13) in two shoulder holes of right groove of erecting frame (4); Described shoulder hole matches with first, second screw (10,11) and the 3rd, the 4th screw (12,13) respectively.