Patent Document ID: 20060173349
Application ID: 11034146
Patent Flag: 0

Claim One:
1. An intrusion detection method by using ultrasonic signals, said intrusion detection method including a training phase and a detection phase, said training phase being proceeded when an intrusion does not occur, said training phase comprising the steps of: (a) sequentially capturing plural ultrasonic echoes from an ultrasonic sensor and form one or more ultrasonic signals; (b) performing signal process and feature extraction for said ultrasonic signals; and (c) conducting a feature training to establish at least one background module which is used for comparison in said detection phase; said detection phase comprising the steps (a), (b), and the following steps of: (d) forming testing features by sampling a plurality of the extracted features in step (b); (e) comparing said testing features with said background module established in said training phase; and (f) determining if an intruder is detected according to the results of said comparison.