Method and apparatus for measuring the displacements of particle

Details Method and apparatus for measuring the displacements of particle Method and apparatus for measuring the displacements of particle

1985-05-29

1988-03-01

Krass, Errol A.

Boots, shoes, and leggings

364561, 7386106, 356 28, G01P 522, G01P 336, G01F 100

Patent

active

047291095

ABSTRACT:
A hybrid optical/digital method for measuring the displacements of compact images, in particular, particle images recorded on photographic or other recording media in multiple exposure photography. The method compresses the two-dimensional image field of the particles into two one-dimensional line images that are perpendicular to each other. The mean particle displacement between multiple exposures is determined by digitizing the one dimensional images, computing their autocorrelations, and locating the peaks of those autocorrelations. This method is particularly adapted to measure the velocity fields in fluids containing many small particles. Alternatively, when the first and second images of a single particle are the only images in the image field, the displacement is found by locating the peak of each image.

REFERENCES:
patent: 3842252 (1974-10-01), Jakeman et al.
patent: 4097158 (1978-06-01), Dehait
patent: 4285046 (1981-08-01), Henry
patent: 4494213 (1985-01-01), Thompson
patent: 4543834 (1985-10-01), Hasegawa et al.
patent: 4554832 (1985-11-01), Hasegawa et al.
patent: 4593368 (1986-06-01), Fridge et al.
patent: 4664513 (1987-05-01), Webb et al.
DeCooman et al, "Measurement of the Velocity of Gas Bubbles in Water by a Correlation Method", The Review of Scientific Instruments", vol. 41, No. 6, Jun. 1973, pp. 843-845.
Nord, H., "A New Solution to an Old Flow Measuring Problem", ISA Transactions, vol. 20, No. 2, 1981, pp. 11-14.

Affiliated with

Also associated with

Rating

Method and apparatus for measuring the displacements of particle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring the displacements of particle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring the displacements of particle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1003285