Patent ID: 8963767
Filing Date: 2015-02-24
Classification: G01S

Abstract:
1. A method for detecting motion of object by using ultra-wideband radar imaging comprising the steps of: (a) under an initial condition, from a plurality of detecting positions, transmitting at least a first ultra-wideband microwave signal along a direction to a plurality of first detected positions of a object, the first detected positions being respective to the detecting positions; (b) receiving at least a second ultra-wideband microwave signal at the detecting positions, the second ultra-wideband microwave signal being reflected from the first detected positions of the object; (c) analyzing a plurality of reference signal delay times for the second ultra-wideband microwave signal received at the detecting positions and analyzing a plurality of reference distances between the first detected positions and the respective detecting positions accordingly so as to generate a reference gray-scale image of the object; (d) under a detecting condition, from the detecting positions, transmitting the at least one first ultra-wideband microwave signal along the direction to a plurality of second detected positions of the object, the second detected positions being respective to the detecting positions; (e) receiving the at least one second ultra-wideband microwave signal at the detecting positions, the second ultra-wideband microwave signal being reflected from the second detected positions of the object; (f) analyzing a plurality of detecting signal delay times for the second ultra-wideband microwave signal received at the detecting positions, and analyzing a plurality of detecting distances between the second detected positions and the respective detecting positions accordingly; (g) in the reference gray-scale image, comparing time-varying distance variations between the reference distances and the detecting distances with respective to the detecting positions; and (h) presenting motion of the object in the reference gray-scale image according to the distance variations.