Method for determining difference in distance

Details Method for determining difference in distance Method for determining difference in distance

A - Human Necessities

01

K

A01K 73/04 (2006.01) G01S 11/14 (2006.01) G01S 15/74 (2006.01)

Patent

CA 2750812

The invention consists of a method which comprises a plurality of steps for determining difference in distance from a reference point to at least two sensor modules 10, 20 that are located under water. The sensor modules 10, 20 comprise means for sending and receiving acoustic signals to each other and to a hydrophone 30 at the reference point. Connected to the hydrophone 30 is a calculating unit 40 that utilises arrival time of the received signals from the sensor modules to determine difference in distance from the sensor modules (10, 20) to the reference point.

L'invention concerne un procédé qui comprend une pluralité d'étapes pour déterminer une différence de distance entre un point de référence et au moins deux modules de capteur (10, 20) qui sont situés sous l'eau. Les modules de capteur (10, 20) comprennent des moyens pour envoyer et recevoir des signaux acoustiques entre eux et à/depuis un hydrophone (30) au niveau du point de référence. Une unité de calcul (40) est connectée à l'hydrophone (30), celle-ci utilisant le moment d'arrivée des signaux reçus des modules de capteur pour déterminer une différence de distance entre les modules de capteur (10, 20) et le point de référence.

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