Method and apparatus for delay analysis of energy transmitted th

Details Method and apparatus for delay analysis of energy transmitted th Method and apparatus for delay analysis of energy transmitted th

1979-05-15

1981-07-14

Smith, Jerry

Boots, shoes, and leggings

364506, 364553, 367102, G06F 1520, G01S 923

Patent

active

042790190

ABSTRACT:
A method and apparatus is disclosed for determining the manner by which an initial injection of wave energy is modified by a medium under test using a time delay spectrometer (TDS) and a fast Fourier transform (FFT). A switch allows either the time delay spectrum or an energy-time curve to be displayed. A differentiator at the input of the FFT corrects for inverse square loss of energy through the medium, i.e., compensates for spherical expansion of energy. Different arrangements of the TDS adapt the system to a medium having variable time delay, or adapt the system for measurement of harmonic distortion through the medium.

REFERENCES:
patent: 3135942 (1964-06-01), Tucker et al.
patent: 3466652 (1969-09-01), Heyser
patent: 3798590 (1974-03-01), Jacobson et al.
patent: 3906213 (1975-09-01), Meriaux et al.

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