Patent ID: 8106812
Filing Date: 2012-01-31
Classification: G01S

Abstract:
1. A method for detection of motion of the surface ( 13 ) of an object ( 4 ) by means of a detection device ( 1 ), the object ( 4 ) being stationary during a detection process, and situated in a space ( 2 ) on the opposite side of a wall ( 3 ) in relation to the detection device ( 1 ), and having a relative dielectric constant ε r greater than 1.1, the method is characterized by the steps of: a) generating a data model of the object ( b) transmitting radar signals in the form of radar pulses, the frequency components of which are distributed within the frequency range of 30 MHz-12,4 GHz, c) receiving reflected radar signals generated at reflection points consisting of dielectric steps when the radar signals pass into and out of, respectively, the object ( d) comparing the received reflected radar signals with the transmitted radar signals in order to obtain correlation results, each of which communicates distances between two known positions ( e) difference analyzing different correlation results obtained over time in order to detect a motion of a specific reflection point of the surface ( f) by means of difference analyses of correlation results belonging to at least three mutually separated sets of two known positions ( g) creating a radar model of the motion of the surface (