Method and apparatus for measuring the density of an object incl

Details Method and apparatus for measuring the density of an object incl Method and apparatus for measuring the density of an object incl

1989-07-27

1991-10-01

Green, Randall L.

Surgery

Truss

Pad

73 32R, 73433, A61B 5103

Patent

active

050524054

ABSTRACT:
A method and apparatus is provided for measuring the volume and density of an object, including a living being, which avoids the necessity of immersing the subject in a liquid medium. Where the subject is a living being, the percentage of body fat may readily be determined from the density value. The density of the subject is measured by recording the weight of the subject for several different temperatures of a fluid, preferably air, surrounding the subject. The apparent weight change of the subject at the different measured temperatures of surrounding air represents changes in the buoyant forces exerted by the air on the subject at different air densities. The buoyant force acting on the subject is calculated from these measurements, and the volume of the subject is determined from its relationship with the buoyant force. The density of the subject can then be calculated from the volume and weight parameters. Where the subject is a human being or animal, its density is monotonically related to its fat content.

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patent: 4449406 (1984-05-01), van Haren
patent: 4831527 (1989-05-01), Clark

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