Boots – shoes – and leggings
Patent
1991-04-30
1994-01-18
McElheny, Jr., Donald E.
Boots, shoes, and leggings
36441313, 36441314, 36441316, G06F 1542
Patent
active
052804291
ABSTRACT:
A method and apparatus for displaying complex impedance and related physical characteristics of an object at a plurality of sinusoidal frequencies over a wide frequency range. Excitation signal waveforms are stored in digital form. Digital sampling and processing circuitry provide high noise immunity and accurate measurement at all impedance phase angles. The technique is particularly well-suited to the measurement of complex impedances in living biological tissue because the digital implementation results in highly accurate measurement values over a plurality of selectable frequencies within a wide sinusoidal frequency region. A novel adaptation of digital cross-correlation and convolution techniques is used to simultaneously display real and imaginary electrical impedance of living biological tissue at several selectable sinusoidal frequencies.
REFERENCES:
patent: 3316896 (1967-05-01), Thomasset
patent: 4008712 (1977-02-01), Nyboer
patent: 4450527 (1984-05-01), Sramek
patent: 4793362 (1988-12-01), Tedner
patent: 4895163 (1990-01-01), Libke et al.
patent: 4911175 (1990-03-01), Shizgal
patent: 4942880 (1990-07-01), Slovak
patent: 4951682 (1990-08-01), Petre
patent: 5063937 (1991-11-01), Ezenwa et al.
"Electrical Measurement of Fluid Distribution in Legs and Arms", Kanai et al., Medical Progress through Tech., 12:159-170, 1987.
Equipment Using An Impedance Technique For Automatic Recording Of Fluid-Volume Changes During Hemodialysis--Med. and Bio. Eng. and Comput. 21:285-290, 1983, Tedner, B.T.
Body Composition Measurements From Whoel Body Resistance And Reactance--Surgical Forum, 36:43-44, 1986, McDougal D., et al.
Estimation Of Body Fluid Volumes Using Tetrapolar Bioelectrical Impedance Measuremetns, Avait. Envirom. Med. Dec., pp. 1163-1169, 1988, Lukaski, H. C., et al.
Fat-Free Mass Estimation By Two Electrode Impedance Method, M. G. Clin. Nutr. 52:581-5, 1990, Boulier, A., et al.
A Computer-Based Biolectric Impedance Spectroscopic System For Noninvasive Assessment of Compartmental Fluid Redistribution, Proc. Third Annual IEEE Sumposium on Computer-Based Medical Systems, Jun. 3-6, 1990, pp. 446-453, Gerth, W. A. et al.
McElheny Jr. Donald E.
Shingala Gita D.
Xitron Technologies
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