Optical correlation method for measuring particle size and concentration (Abstract Only)

1994 ◽  
Author(s):  
Peter P. Maksimyak ◽  
Oleg V. Angelsky
Keyword(s):  
Particle Size ◽  
Correlation Method ◽  
Optical Correlation

Two-dimensional cell tracking by FPGA-optical correlation method

2009 ◽  
Author(s):  
Iraís Solís ◽  
M. Torres-Cisneros ◽  
J. G. Aviña-Cervantes ◽  
O. G. Ibarra-Manzano ◽  
O. Debeir ◽  
...  
Keyword(s):  
Cell Tracking ◽  
Correlation Method ◽  
Two Dimensional ◽  
Optical Correlation ◽  
Dimensional Cell

Optical correlation method for measuring spatial complexity in optical fields

1993 ◽  
Vol 18 (2) ◽  
pp. 90 ◽  
Author(s):  
O. V. Angelsky ◽  
P. P. Maksimyak ◽  
T. O. Perun
Keyword(s):  
Correlation Method ◽  
Optical Fields ◽  
Optical Correlation ◽  
Spatial Complexity

Study on the Effect of WC Size on the Thermal Expansion Coefficient of WC/Cu Composites

2013 ◽  
Vol 275-277 ◽  
pp. 1597-1600 ◽  
Author(s):  
Hai Yu ◽  
Rong Xin Guo ◽  
Hai Ting Xia ◽  
Feng Yan ◽  
Yu Bo Zhang
Keyword(s):  
Particle Size ◽  
Thermal Expansion ◽  
Powder Metallurgy ◽  
Digital Image Correlation ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Digital Image ◽  
Correlation Method ◽  
Image Correlation ◽  
Powder Metallurgy Method

Abstract: In order to study the effect of WC size on the thermal expansion coefficient of WC/Cu composites after anneal, WC/Cu composites with different WC particle size were prepared by powder metallurgy method. In this paper the thermal expansion coefficient of WC/Cu composites were measured by digital image correlation method. The results show that the thermal expansion coefficient increased with the increasing of temperature and the particle size.

Investigating flow of liquids by means of an optical correlation method

1969 ◽  
Vol 12 (4) ◽  
pp. 505-507
Author(s):  
N. F. Derevyanko ◽  
V. M. Latyshev ◽  
A. M. Trokhan
Keyword(s):  
Correlation Method ◽  
Optical Correlation

Slurry Flow Velocity, Concentration and Particle Size Measurement Using Flow Noise and Correlation Techniques

1975 ◽  
Vol 8 (11) ◽  
pp. 453-463 ◽  
Author(s):  
K. H. Ong ◽  
M. S. Beck
Keyword(s):  
Particle Size ◽  
Turbulent Flow ◽  
Volume Flow Rate ◽  
Correlation Method ◽  
Characteristic Size ◽  
Volume Flow ◽  
Flow Noise ◽  
Direct Indication ◽  
Correlation Techniques ◽  
Particle Size And Shape

Three areas of slurry pipe flow measurement using flow noise and correlation techniques are described. Signals generated by the natural turbulence inherent in the flow of two-component fluids can be used to enable the total volume flow rate, concentration and particle size of the discontinuous component to be measured. Total volume flow is measured by a cross correlation method which involves obtaining the time of flight of a tagging signal due to the turbulence between two transducers spaced axially along the direction of flow. Both ultrasonic and conductivity transducers are used to detect the flow turbulence. Results show that a measurement accuracy within ±2% can be achieved in all systems tested. The intensity of the flow noise detected by a simple transducer is related to the quantity of the discontinuous component present in the flow. This flow noise is measured by an AC method and gives direct indication of the concentration of the discontinuous component. Turbulent flow consists of eddies which have characteristic size ranges. The motion of particles in a turbulent flow field is a function of the particle size and shape, and the density of the particles and of the fluid. A measure of the eddy size based on the spectral analysis of the flow noise can be used to give an indication of the mean particle size.

Optical Correlation Recognition Technology of Small Moving Target Based on Wavelet Multi-Scale Edge Fusion

2013 ◽  
Vol 552 ◽  
pp. 536-541
Author(s):  
Su Zhang ◽  
Qi Bo Zhang ◽  
You Jian Wang ◽  
Wen Sheng Wang
Keyword(s):  
High Speed ◽  
Target Recognition ◽  
Correlation Method ◽  
Moving Target ◽  
Joint Transform Correlator ◽  
Fusion Algorithm ◽  
Optical Correlation ◽  
Multi Scale ◽  
Template Update ◽  
Small Targets

Moving target recognition has a wide application in varieties of domains and has received more attention in recent years. Among all the recognition methods, optical correlation technology, using hybrid optoelectronic joint transform correlator (HOJTC), has the merits of parallel, large capacity and high-speed, so it is considered as one of the most effective methods for moving target detection. But in the course of detecting, some targets are too small to be recognized by HOJTC. These small targets in cluttered background and strong noise may affect the brightness of the correlation peaks and have a serious influence on target recognition results. In order to solve this problem, this paper applies a wavelet multi-scale edge fusion algorithm which firstly extracts the edge at different scales by wavelet modulus maximum method, and then fuses the detected edge to obtain more edge information of the target. In addition, for the moving distortion problems, taking temporal state of the target as the template can achieve the template update. To prove this method, many detection experiments of small moving targets have been performed with optical correlation method. As an example a small target “boat” taking up only pixels is presented. The recognition results show that the brightness of the correlation peaks is enhanced and the target recognition ratio is increased. The conclusion can be drawn that applying this algorithm in optical correlation method can realize the small moving target recognition successfully and expand the application to scope of optical correlation technology.

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