초록 ▼

An electromagnetic method for detecting and/or locating a person constituting a non-cooperative target, in which an electromagnetic signal is transmitted (1) in the vicinity of a search zone (N), and the signal returned by said zone (N) is detected (2) in the vicinity thereof, the method being chara

An electromagnetic method for detecting and/or locating a person constituting a non-cooperative target, in which an electromagnetic signal is transmitted (1) in the vicinity of a search zone (N), and the signal returned by said zone (N) is detected (2) in the vicinity thereof, the method being characterized in that transmission and reception are performed by means of at least two distinct antennas, each signal obtained in this way is filtered by a lowpass or a bandpass filter (12) so as to extract therefrom components corresponding to human movement, and in that each filtered signal obtained in this way is processed (14) to deduce therefrom the presence of a person and/or to locate that person. The system enables the method to be implemented. Application to locating avalanche victims.

대표청구항 ▼

[ We claim:] [1.] An electromagnetic method for detecting a person constituting a non-cooperative target, in which an electromagnetic signal is transmitted (1) in the vicinity of a search zone (N), the signal returned by the person is detected (2) in the vicinity of said zone (N), each signal obtain

[ We claim:] [1.] An electromagnetic method for detecting a person constituting a non-cooperative target, in which an electromagnetic signal is transmitted (1) in the vicinity of a search zone (N), the signal returned by the person is detected (2) in the vicinity of said zone (N), each signal obtained in this way is filtered by a bandpass filter (12) so as to extract therefrom components corresponding to movement of a human, and each signal obtained in this way is processed (14) to deduce therefrom the presence of a person, the method being characterized in that to locate a person, said transmission and reception are implemented by means of at least two distinct antennas, in that at least one modulating probe (16) which generates a virtual echo at a frequency different from that of human movement is disposed on the search zone, a signal corresponding to said virtual echo is detected in the vicinity of the search zone, the virtual echo signals obtained in this way are processed in the same manner as the filtered return signals, and the parameters resulting from the processing of the virtual echo signals and the parameters resulting from processing of the filtered return signals are compared to locate said person.