Patent ID: 6700528
Filing Date: 2004-03-02
Classification: G01S,H01Q

Abstract:
A compact, inexpensive, autonomous motion detection and alerting system for detecting motion within a pre-specified velocity range, components of said system comprising:at least one transceiver sub-assembly; wherein said at least one transceiver sub-assembly: propagates electromagnetic energy as a transmitted signal in a pre-specified pattern and direction to illuminate a non-smooth surface; receives at least some energy reflected therefrom as a reflected signal; and provides a reference signal at a pre-specified sampling rate; and at least one signal processing sub-assembly in operable communication with said at least one transceiver sub-assembly, wherein, by determining the difference in frequency between said reference signal and said reflected signal, said at least one processing sub-assembly establishes the existence of a pre-specified range of Doppler frequencies that may be correlated to motion having velocities within said pre-specified velocity range, and wherein said at least one processing sub-assembly employs at least one decision algorithm to establish movement of said non-smooth surface, and wherein said at least one processing sub-assembly enables said alerting based upon a pre-specified output of said decision algorithm.