Abstract: The invention relates to an intrusion detection process for detecting an intrusion within a space, in which at least two acoustic or electromagnetic signals are emitted at different frequencies (f1, f2, . . . fn) inside said space; at a point inside said space, a signal is received that is the combination of the signals emitted and reflected in said space; the characteristics of the demodulated signals of different frequencies are compared to establish the presence or absence of an intrusion; an intrusion signal is generated when the presence of an intruder is confirmed. The invention also proposes an intrusion detection device implementing the process according to the invention.
Type:
Grant
Filed:
March 17, 2000
Date of Patent:
January 8, 2002
Assignee:
Valeo Service Limited
Inventors:
Michael Taylor, Vincent Garvey, Scott Jackson, Omar Meradi