Process and apparatus for determining the visco elastic characte

Details Process and apparatus for determining the visco elastic characte Process and apparatus for determining the visco elastic characte

1980-03-04

1982-07-27

Ruehl, Charles A.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

73 59, G01N 1110, G01N 3348

Patent

active

043411118

ABSTRACT:
Process and apparatus for determining visco-elastic characteristics of specimens such as fluids and/or of polymerizing mixtures, especially of coagulation fluids such as blood or blood plasma, and their temporal changes by determining the resonance frequency and/or the amplitude of the resonance frequency of the oscillation system formed by a member and its elastic support which are stimulated for oscillation over a frequency range at least close to the natural or Eigen-frequency of the oscillation system. That member which is so stimulated is either a specimen container or a body therein, the other being fixed, so that there is relative motion between them. The determined resonance frequency amplitude relates to the viscosity of the specimen, while the position of the resonance frequency relates to the elasticity of the specimen and thus to the total elasticicty constant of the oscillation system.

REFERENCES:
patent: 3225588 (1965-12-01), Moulin et al.
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patent: 3714815 (1973-02-01), Hartert
patent: 3722262 (1973-03-01), Gilinson, Jr. et al.
patent: 3751975 (1973-08-01), Katsura
patent: 3943753 (1976-03-01), Simon
patent: 4026671 (1977-05-01), Simons et al.
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patent: 4148216 (1979-04-01), Do et al.
patent: 4154093 (1979-05-01), Smith et al.
patent: 4202204 (1980-05-01), Hartert
"Piezoelectric Method of Determining Viscosity at 40 KHZ", W. H. Robinson et al., pp. 1070-1076, Mar. 1978, Journal of Applied Physics, vol. 49, No. 3.

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