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1. (WO2018085914) SYSTEM AND METHOD FOR TRACKING THE POSITION OF AN OBJECT

Pub. No.:    WO/2018/085914    International Application No.:    PCT/CA2017/000236
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: G01S 5/22
Applicants: BREQLABS INC.
Inventors: LABRECQUE, Martin
Title: SYSTEM AND METHOD FOR TRACKING THE POSITION OF AN OBJECT
Abstract:
The present invention is a system and method for determining the position of a transmitter relative to a receiver using ultrasound. The transmitter emits an ultrasonic sound pulse provide an indication of the time of emission of the sound electronically. A computer processor receives the time indication from the transmitter and three ultrasonic receivers positioned in a fixed arrangement. The receivers are not positioned collinearly and are spaced apart from each other by less than two times the wavelength of the sound. The computer processor estimates the relative position of the transmitter based on the time indication and time of flight of the ultrasonic sound to each of the three receivers. In preferred embodiments, the receivers are spaced apart from each other by less than the wavelength of the sound.