Measurement method and system for detecting coaxiality by using single laser sensor

A laser sensor and coaxiality measurement technology, applied in the field of measurement systems, can solve problems such as difficult detection, complex structure design of the measurement system, and high cost, and achieve high efficiency, good industrial automation level, and low cost effects

Inactive Publication Date: 2019-06-21
XI AN JIAOTONG UNIV
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research schemes use multiple laser sensors to be placed in the hole to be measured respectively, but this scheme is difficult to realize the detection of the hole to be measured with a small diameter or a large hole depth and uses multiple sensors for measurement. The system structure design is complex, the cost is high and the level of industrial automation is low

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
  • Measurement method and system for detecting coaxiality by using single laser sensor
  • Measurement method and system for detecting coaxiality by using single laser sensor
  • Measurement method and system for detecting coaxiality by using single laser sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The invention provides a measurement method and system for detecting coaxiality with a single laser sensor. For holes with continuous surface features processed by drills, milling cutters, etc., the local characteristics are used to reflect the characteristics of the whole. The feature points in the local area of ​​each hole are fitted to the axis, so as to calculate the coaxiality of the two holes to be measured. The invention can realize high-efficiency and high-precision coaxiality detection for unconnected hole pairs with a certain axial distance in parts, and has good industrial automation level and economic efficiency.

[0039] A measurement system using a single laser sensor to detect coaxiality, including a laser sensor 2, an electric rotary table 4, a motion mechanism 5 and a computer, the electric rotary table 4 is arranged on the motion mechanism 5, and the laser sensor 2 is located between two holes to be measured It is connected with the electric turntable ...

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 measurement method and system for detecting coaxiality by using a single laser sensor. According to the measurement method, a measuring system is constructed; the relative positions of the laser sensor and the two to-be-tested holes of a part are adjusted; the feature points of local regions in the two to-be-tested holes are collected through the laser sensor a; data columns collected each time and point intervals on a line light source are combined so as to be converted into a two-dimensional coordinate system, so that elliptic equations are obtained by means of fitting, and the geometric center point of each ellipse is calculated; all the calculated center points of the ellipses are converted to a global three-dimensional coordinate system; the ideal axes and common axis of the two holes are separately obtained by means of fitting; and the coaxiality measurement value of the two to-be-tested holes to be tested is calculated. The method and system of the invention have the advantages of low cost, high efficiency and high industrial automation level in measurement.

Description

technical field [0001] The invention belongs to the technical field of machine vision measurement, and in particular relates to a method and system for measuring the coaxiality of a part with a double-hole structure by using a single laser sensor. Background technique [0002] Coaxiality is a common position error. As a technical index of mechanical parts processing, it has very common requirements in the processing of parts in various fields such as vehicles, medical equipment, and aviation. There are two types of commonly used detection methods for coaxiality errors. One is contact measurement. Although it can achieve better measurement accuracy, it has low efficiency, few sampling points and is easily affected by environmental factors. The other is non-contact measurement. Typical non-contact measurement methods include ultrasonic testing, eddy current testing and laser sensor testing. Among them, the laser sensing detection method has the characteristics of complete in...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/27
Inventor 张英杰许丙超孟姝君张琳罗希
Owner XI AN JIAOTONG UNIV
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