Acoustic ranging system

Details Acoustic ranging system Acoustic ranging system

G - Physics

01

N

349/33, 349/38

G01N 29/00 (2006.01) G01F 23/28 (2006.01) G01F 23/296 (2006.01) G01S 7/527 (2006.01)

Patent

CA 1214858

ABSTRACT In an acoustic ranging system, an echo signal received following a shot is repeatedly sampled and the samples digitized, to produce a statistical data base represent- ing the received echo profile which can be analyzed by various methods to determine the point on the time axis of the profile which corresponds to a wanted echo, and the degree of confidence with which the wanted echo has been identified. The number of shots taken depends upon the conditions at the site being monitored and upon the degree of confidence with which the wanted echo has been determined, and the order in which points in a multipoint system are monitored is determined by an adaptive scan- ning system which directs shots to different points following a system determined by a predetermined hierar- chy, by the results provided by previous shots, by the conditions existing at different points, and by the receipt of outside signals.

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