Low transmittance ICF capsule geometric parameters measurement using laser differential confocal technique

2013 ◽  
Vol 292 ◽  
pp. 62-67 ◽  
Author(s):  
Weiqian Zhao ◽  
Junjie Guo ◽  
Lirong Qiu ◽  
Yun Wang ◽  
Jie Meng ◽  
...  
Keyword(s):  
Geometric Parameters ◽  
Parameters Measurement ◽  
Confocal Technique

Buried Cylinders Geometric Parameters Measurement by Means of GPR

PIERS Online ◽  
2006 ◽  
Vol 2 (2) ◽  
pp. 187-191 ◽  
Author(s):  
B. A. Yufryakov ◽  
Oleg N. Linnikov
Keyword(s):  
Geometric Parameters ◽  
Parameters Measurement

Railway Geometric Parameters Measurement System Based on Videometrics

2010 ◽  
Vol 30 (11) ◽  
pp. 3203-3208
Author(s):  
伏思华 Fu Sihua ◽  
于起峰 Yu Qifeng ◽  
王明志 Wang Mingzhi ◽  
江和平 Jiang Heping ◽  
徐博泓 Xu Bohong
Keyword(s):  
Measurement System ◽  
Geometric Parameters ◽  
Parameters Measurement

Vehicle Geometric Parameters Measurement Based on Image Processing

2011 ◽  
Vol 58-60 ◽  
pp. 2267-2272
Author(s):  
Zhi Hua Wang ◽  
Yu’e Jiang ◽  
Zhao Zhao ◽  
Li Zheng
Keyword(s):  
Image Processing ◽  
Detection Algorithm ◽  
Geometric Parameters ◽  
Image Mosaic ◽  
Canny Edge Detection ◽  
Black And White ◽  
Canny Edge ◽  
Parameters Measurement ◽  
The Relationship ◽  
Canny Edge Detection Algorithm

This paper proposes a new method for measuring vehicle geometric parameters, which is based on image processing. In the method, a black and white bar-cord ruler is applied to calculate the vehicle dimensions. Canny edge detection algorithm and image mosaic algorithm based on Image-Based Rendering (IBR) technique are utilized to deal with the target images. According to the relationship between the vehicle and the bar-cord ruler in the target images, the geometric parameters of the vehicle can be measured. Furthermore, the experiments indicate that the method has a good performance in measuring the dimensions of a vehicle.

Research on Optical Microscope Measuring Method of External Thread Parameters Based on Charge-Couple Device

2012 ◽  
Vol 163 ◽  
pp. 39-43 ◽  
Author(s):  
Wen Qi Wang ◽  
Dong Xiang Shao ◽  
Jian Feng Jiang ◽  
Guang Lin Wang
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Measuring Method ◽  
Optical Microscope ◽  
Geometric Parameters ◽  
Geometrical Parameters ◽  
Charge Couple Device ◽  
Vision Measurement ◽  
Improvement Method ◽  
Parameters Measurement

As an important component of the fasteners members, threads quality, depending on whether its geometric parameters meet requirements or not, will affect the reliability of the whole machine system. Therefore, geometrical parameters measurement of the thread is especially important. Aiming at the characteristics of the thread teeth type, this paper adopt a machine vision measurement method based on the universal tool microscope and CCD .This paper also analyzes the causes and influences of the teeth shading and proposes a corresponding improvement method, specific to the shading problem in the process of backlighting projection. After experimenting, this method can effectively improve the accuracy and efficiency of the male parameters measurement.

Thick film geometric parameters measurement by white light interferometry

2009 ◽  
Author(s):  
Long Ma ◽  
Tong Guo ◽  
Fang Yuan ◽  
Jian Zhao ◽  
Xing Fu ◽  
...  
Keyword(s):  
Thick Film ◽  
White Light ◽  
Geometric Parameters ◽  
White Light Interferometry ◽  
Parameters Measurement

scholarly journals Geometric Parameters Measurement of Wheel Tread Based on Line Structured Light

2016 ◽  
Vol 3 (2) ◽  
pp. 124 ◽  
Author(s):  
Jiwu Wang ◽  
Zhijing Jian ◽  
Yaodong Li ◽  
Sugisaka Masanori
Keyword(s):  
Structured Light ◽  
Geometric Parameters ◽  
On Line ◽  
Parameters Measurement

Lectin-Induced RBC Agglutination: Chemical vs. Cryofixation

1980 ◽  
Vol 38 ◽  
pp. 664-665
Author(s):  
Dean A. Handley ◽  
Lanping A. Sung ◽  
Shu Chien
Keyword(s):  
Lectin Binding ◽  
Freeze Substitution ◽  
Electrostatic Charge ◽  
Geometric Parameters ◽  
Comparative Approach ◽  
Chemical Fixation ◽  
Cell Surfaces ◽  
Minimal Cell ◽  
Membrane Stiffness ◽  
Cell Contour

RBC agglutination by lectins represents an interactive balance between the attractive (bridging) force due to lectin binding on cell surfaces and disaggregating forces, such as membrane stiffness and electrostatic charge repulsion (1). During agglutination, critical geometric parameters of cell contour and intercellular distance reflect the magnitude of these interactive forces and the size of the bridging macromolecule (2). Valid ultrastructural measurements of these geometric parameters from agglutinated RBC's require preservation with minimal cell distortion. As chemical fixation may adversely influence RBC geometric properties (3), we used chemical fixation and cryofixation (rapid freezing followed by freeze-substitution) as a comparative approach to examine these parameters from RBC agglutinated with Ulex I lectin.

Evaluation of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings by the multi-frequency radio wave method of a slow surface electromagnetic waves

2020 ◽  
pp. 51-58
Author(s):  
Aleksandr I. Kazmin ◽  
Pavel A. Fedjunin
Keyword(s):  
Radio Wave ◽  
Noise Level ◽  
Electromagnetic Waves ◽  
Dielectric Materials ◽  
Geometric Parameters ◽  
Experimental Investigations ◽  
Wave Method ◽  
Dielectric Coatings ◽  
Surface Electromagnetic Waves ◽  
Multilayer Dielectric

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

Sign in / Sign up

Export Citation Format

Share Document