METHOD AND DEVICE FOR MULTICHANNEL MULTIFREQUENCY ANALYSIS OF AN OBJECT

摘要

A method for multichannel multifrequency analysis of an object, applying a set of excitation signals to the object and sampling the response signal from the object, using uniform and non-uniform undersampling. Non-uniform sampling of the response signal is performed, i.e., the sampling is performed for two or more different frequencies in one observation time slot. Also, uniform sampling of the response signal is performed, i.e., the sampling of a signal, corresponding to one frequency, is performed for two or more channels within one observation time slot and then sampling the same signal for another frequency for two or more channels within the next observation time slot.

主权项

1. Method for multichannel multifrequency analysis of an object, comprising:
generating a set of excitation signals, said set comprising at least one component with a predetermined first frequency and applying said set of excitation signals to the object through an excitation electrode; generating a set of phase related sampling instances, corresponding to said set of excitation signals; receiving a response signal from the object through at least one response electrode; and sampling said response signal with said set of phase related sampling instances, during a predetermined observation slot, wherein length of said observation slot is determined by said first frequency so that the observation slot comprises an integer number of periods of the signal with first frequency.