Method for detecting vehicle door outer plate shape and size based on single-projection encoding structured light

A technology for coding structured light and size detection, which can be used in measurement devices, optical devices, image data processing, etc., and can solve rare problems

Inactive Publication Date: 2013-04-17
JILIN UNIV
View PDF4 Cites 59 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are more and more researches on structured light vision technology, the research on the application of structured

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
  • Method for detecting vehicle door outer plate shape and size based on single-projection encoding structured light
  • Method for detecting vehicle door outer plate shape and size based on single-projection encoding structured light
  • Method for detecting vehicle door outer plate shape and size based on single-projection encoding structured light

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0211] Example

[0212] 1. Calibration stage of structured light detection system

[0213] 1. Camera calibration

[0214] Referring to Figure 2, use Zhang Zhengyou's calibration method (ZHANG Z Y, A Flexible New Technique for Camera Calibration [R]. Microsoft Corporation, NSR-TR-98-71, 1998) for calibration, first paste 9× on the lower left corner of the calibration plane 9 camera checkerboard target and use projector 4 to project the designed 12×16 checkerboard target to the right side of the calibration plane, and then use camera 2 to shoot the entire calibration plane. The calibration plane is as follows Figure 2-a shown. The camera checkerboard target image in the lower left corner of the captured 12 images is used for feature corner extraction. Each camera checkerboard target image can extract 100 corner points, and 12 images have a total of 1200 feature corner image coordinates. . According to Zhang Zhengyou's calibration method, the world coordinate system is set a...

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 method for detecting vehicle door outer plate shape and size based on single-projection encoding structured light and aims to break through the condition that structured light visual detecting technology is rarely applied to online detection on the vehicle door outer plate shape and size. The method comprises the following steps of 1, calibrating a structured light detecting system, i.e. calibrating a camera (2) and a projector (4), and establishing corresponding non-linear relation between a space position and an image coordinate; 2, designing an encoding projection template; 3, decoding and identifying a detecting image, i.e. projecting the encoding projection template to the surface of a vehicle door outer plate by using the projector (4), shooting a surface image of the vehicle door outer plate by using the camera (2), and transmitting the shot image to a computer to be processed and identified; and 4, calculating a space point cloud coordinate and evaluating an error, i.e. 1) calculating a three-dimensional space coordinate of surface projection image characteristic points of the vehicle door outer plate, and 2) matching and rectifying a detecting point cloud obtained through calculation and a point cloud model measured by a three-coordinate measuring machine.

Description

technical field [0001] The invention relates to a non-contact on-line detection method for the shape and size of a car door outer panel, more specifically, the invention relates to a method for detecting the shape and size of a car door outer panel based on single-projection coded structured light. Background technique [0002] Most of the outer panels of automobile doors are three-dimensional curved surfaces, which generally refer to automobile stamping parts and components welded by multiple stamping parts; the shape and size detection of the outer panel of the door is an important means to evaluate the manufacturing quality of the outer panel of the automobile door. Accuracy seriously affects the assembly, safety and visual aesthetics of the car. At present, the commonly used detection method is mainly to use the three-coordinate measuring machine to conduct sampling off-line detection. Although it can obtain high detection accuracy, it is easy to cause damage to the surf...

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): G01B11/25G06T7/00
Inventor 崔岸张成陈洪柱王希阁徐倩陈勇
Owner JILIN 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