Blade optical rapid measurement method based on double-probe four-axis measurement system

A measurement system and measurement method technology, applied in measurement devices, optical devices, instruments, etc., can solve problems such as difficulty in satisfying multi-angle and omni-directional three-dimensional scanning, inability to measure, etc., to solve the lack of point cloud data and improve measurement accuracy. , Measuring the effect of process automation

Inactive Publication Date: 2017-10-13
XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
View PDF1 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to meet the multi-angle and omni-directional three-dimensional scanning by using only a single laser displacement sensor.
Although the four-axis measuring machine has been equipped for industrial measurement, its movement method using the turntable as the fourth axis can only realize the 360° rotation of the workpiece in a single measurement plane, which is impossible for blades with measurement requirements on the upper and lower end surfaces. measure the full angle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Blade optical rapid measurement method based on double-probe four-axis measurement system
  • Blade optical rapid measurement method based on double-probe four-axis measurement system
  • Blade optical rapid measurement method based on double-probe four-axis measurement system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention or invention are described in further detail below in conjunction with accompanying drawing:

[0019] see figure 1 , a blade shape fast scanning method specifically includes the following steps:

[0020] In the first step, the initial model of the blade is used to calculate the surface point normal vector.

[0021] 1) Use the initial design model of the blade to sample points to obtain the point cloud data of the initial design model.

[0022] 2) Using the least squares plane fitting algorithm, the direction of the normal vector is calculated point by point for the above sampling points.

[0023] (1) First calculate each measuring point x i The K-nearest neighbors. At present, the common K-nearest neighbor calculation methods include spatial cell method, octree method and K-d tree method. In the present invention, the spatial cell method is adopted. Its algorithm principle is as follows.

[0024] let p = {p 1 ,p 2 ,...,p n} is a set of sa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a blade optical rapid measurement method based on a double-probe four-axis measurement system. According to the method, two non-contact laser displacement sensors are combined on one same four-axis measurement system, in a respective work scope, measurement of a certain special scope of a blade is respectively realized, the measurement results of the two sensors are fused, complete angle three-dimensional point cloud data of an object is acquired, and precise measurement of the blade is lastly realized. The method is advantaged in that a mode of combination of the two non-contact laser measurement probes is employed to carry out three-dimensional measurement of the object, a problem of incomplete data caused by utilizing a single probe for measurement in the prior art is effectively solved, a problem of point cloud data loss of a certain point angle caused by fixed measurement orientation is solved, and measurement precision is improved.

Description

technical field [0001] The invention belongs to the field of advanced measurement technology, and relates to a blade optical fast scanning method, in particular to a method combining two non-contact laser displacement sensors. Background technique [0002] Optical measurement method is a popular advanced measurement method in the field of modern industrial inspection. For complex-shaped objects such as blades, the surface features are diverse and the surface curvature varies in a large range. Compared with the contact measurement method, the optical measurement method can quickly complete the measurement of the three-dimensional shape of the object in a short time. It has high measurement efficiency and a large amount of sampled data. It not only has outstanding achievements in the field of reverse engineering, but also provides high-precision data support for subsequent parameter analysis. [0003] However, it is difficult to satisfy multi-angle and omnidirectional three-d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01B11/24G01B11/00
CPCG01B11/002G01B11/24
Inventor 周翔高小飞许畅达
Owner XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap