Multiple large range laser scanning measurement method

A technology of laser scanning and measurement method, which is applied to measurement devices, optical devices, instruments, etc., can solve the problem that the efficiency of segmented scanning cannot increase the optical knife multiple.

Inactive Publication Date: 2010-06-09
XI AN JIAOTONG UNIV
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Problems solved by technology

However, due to the small distance between the optical knives, the accurate identification of different optical knives is uncertain under certain conditions, and the efficiency of segmental scanning cannot be increased to a multiple of the number of optical knives.

Method used

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  • Multiple large range laser scanning measurement method
  • Multiple large range laser scanning measurement method
  • Multiple large range laser scanning measurement method

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Experimental program
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Embodiment Construction

[0037] 1. Measuring terminal composition.

[0038] Such as figure 1 As shown, the multi-eye wide-range laser scanning measurement terminal is mainly composed of five parts: laser light knife projector 5, multi-eye high-precision digital camera 1, real-time image processing and communication control center 3, handheld mode positioning and attitude monitoring device 6, machine Load mode fixing thread 7, and terminal frame composition.

[0039] The function of the laser light knife projector 5 is to project a plane light beam 4 to the workpiece. The projection line 8 formed on the workpiece is very long and the scanning width is very wide. Four-eye (four) digital cameras 1 are equidistantly arranged along the direction of the projection line 8, and image the projection line in segments to ensure that the width of the projection line is fully utilized, thereby improving measurement efficiency. The real-time image processing and communication control center 3 processes the imagin...

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Abstract

The invention discloses a multiple large range laser scanning measurement method. The method uses multiple cameras which are arranged along the scanning line direction to perform stage imaging to a light knife and increases the total range of the field of vision by increasing the number of the cameras, thus achieving the aim of increasing the scanning efficiency. The length of the laser projecting line is increased correspondingly while the field of vision of cameras is increased so that the length of the light knife used for laser scanning can satisfy the demand of the field of vision for the multiple cameras. The method of the invention can be used to increase the efficiency of the laser scanning in multiple on the basis of not reducing the measurement accuracy.

Description

technical field [0001] The invention relates to a method for measuring three-dimensional outline dimensions by laser scanning, in particular to a method for measuring outline dimensions by using multi-purpose large-scale laser scanning. Background technique [0002] With the in-depth development of extreme manufacturing technology, measurement technology under extreme conditions also emerges as the times require. In the process of manufacturing, assembling and testing large and super-large mechanical equipment, the measurement of its geometric dimensions and shape and position errors is the key factor to ensure the quality of the whole set of equipment. At present, the measurement of large-scale geometric quantities such as aircraft fuselages, ship hulls, and train carriages is mainly based on coordinate measurement technology. Under such measurement conditions, reasonable and effective terminal measurement methods and devices are the key to the system. [0003] The main f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/00
Inventor 蒋庄德马福禄李兵张飞丁建军陈磊
Owner XI AN JIAOTONG UNIV
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