Boots – shoes – and leggings
Patent
1990-07-23
1992-12-29
Black, Thomas G.
Boots, shoes, and leggings
324603, 324615, G06F 1520
Patent
active
051756986
ABSTRACT:
An automatic, multi-use device for measuring the transfer function of any nonlinear continuous network or network component. Transfer functions (also known as input/output reactions) are the main characteristics of all communication and information processing systems. Their evaluation, in the general case, is an elaborate problem. The conventional evaluation procedure had been to linearize the problem, but this procedure was inaccurate in principle and time-consuming. The method of the invention includes the steps of measuring a set of harmonics resulting from application of one (or two) single-frequency sinusoidal signal(s) to the network of interest, and then processing the measured data. The measurement operation is extremely simple. For most networks, only a small number of harmonics of the network's response to a single sinusoidal input signal need be measured. In no case is it necessary to measure more than two sets of harmonics, each for the network's response to a different one of two sinusoidal input signals. To perform the required signal processing steps, a simple, inexpensive processor is employed to solve a single set of equations derived from a set of integral equations which describe, in general, any continuous network. The system of the invention employs standard transducers of the type which convert measured data to electrical signals, to measure the data to be processed. Repetitive performance of the inventive method with respect to changing frequency provides the real-time response in terms of frequency-dependent phase and amplitude transfer functions.
REFERENCES:
patent: 3526761 (1970-09-01), Smith
patent: 4111519 (1978-09-01), Gillis et al.
patent: 4509132 (1985-04-01), Kavaya
patent: 4542955 (1985-09-01), Graindorge et al.
patent: 4607216 (1986-08-01), Yamaguchi et al.
patent: 4607914 (1986-08-01), Fienup
patent: 4625238 (1986-11-01), Penney
patent: 4653909 (1987-03-01), Kuperman
patent: 4713782 (1987-12-01), Blackham
Dorf, Modern Control Systems, Apr. 1983, pp. 38-39, 237-239, Addison-Wesley Publishing.
Stremler, Introduction to Communication Systems, Dec. 1982, 11-14, 38-40, 151-164, Addison-Wesley Publishing.
Moore: An Intro. to the Mathematics of Digital Signal Processing, Part II Computer Music Journal Vol. II, No. 2, pp. 45-46.
Lund & Azouit, Measurement of Two-Dimensional Optical System Modulation Transfer Function (MTF) by Computation of Second Order Speckle Statistics, pp. 166-173, SPIE vol. 192 Interferometory (1979).
Bruel & Kjaer Seminar Notes, Spectral Analysis in Sound and Vibration Seminar, Chapter 5, System Analysis 19 pages, Nov. 29, 1989.
J. S. Barbanell, et al., "Holographic Analysis of the Characteristics of Relief Recording Media," Opt. Spectrosc. (USSR), 58(4) Apr. 1985, pp. 533-537.
J. S. Barbanell, et al., "Holographic Analysis of Phase Media with Absorption", Opt. Spectrosc. (USSR), 60(3), Mar. 1986, pp. 365-369.
Black Thomas G.
DZ Company
Ramirez Ellis B.
LandOfFree
Method and system for transfer function measurement 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 system for transfer function measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for transfer function measurement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1892439