05-12-2013 дата публикации
Номер: US20130322744A1
Принадлежит:
This invention relates to a method of non-contact detection and identification of the type of different substances and mixtures as well as determining their characteristics as concentration, hardness, etc. The method comprises irradiation of the inspected object by a wave pulse or a series of such pulses; reception (), amplification () and analogue-to-digital conversion () of the signal, formation of output detailing wavelet coefficients and output approximating wavelet coefficients by means of fast discrete wavelet transformation of the digitized signal, by means of Mallat's pyramidal algorithm and orthogonal base functions, filtering () of the output approximating and detailing wavelet coefficients up to preselected ones, comparison of the filtered approximating and/or detailing wavelet coefficients, in the capacity of recognition attributes with preselected respective reference coefficients by the classifying device (), and according to the comparison result the presence and type is determined and/or the studied characteristics of the inspected object is determined. 1. Method of detecting and identifying substances or mixtures and/or determining their characteristics , which comprises irradiation of the inspected object by pulse signals of fixed duration , reception of the signal reflected by controllable object , amplification and analogue-to-digital conversion of the received signal and comparison of parameters of the converted signal to prerecorded reference values , wherein the inspected object is irradiated by a single wave pulse with a frequency of 20 kHz to 200 MHz or a series of such pulses , the analogue-to-digital conversion of the received signal is up to at least 128 discrete values followed by:{'sub': 'N', 'b': 4', '5', '6', '4', '5', '6, 'i': i', 'i', 'i', 'i', 'i', 'i, "formation of output detailing wavelet coefficients Di,k (where i varies from 1 to N) and of output approximating wavelet coefficients A,k by means of fast discrete wavelet ...
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