公开(公告)号：US20170115364A1

公开(公告)日：2017-04-27

申请号：US15398316

申请日：2017-01-04

Applicant: Elbit Systems Ltd.

Inventor： Ilan Efrat ,  Evgeni Gurovich ,  Guy Mencel ,  Yoav Ophir ,  Mark Gandelsman

IPC: G01R33/10

CPC classification number: G01R33/10 ,  G01R33/072

Abstract: System for mapping a magnetic-field including a magnetic-field-transmitter, a freestanding magnetic-field-detector operative to freely move within a volume of interest and acquire measurements of the flux of the magnetic-field at a plurality of poses, a pose-information-acquisition-module for measuring information related to the pose of the magnetic-field-detector and a processor, coupled with the magnetic-field-detector and with said pose-information-acquisition-module and determines pose-related-information respective of each of at least a portion of the magnetic-flux-measurements, according to said information related to the pose of said magnetic-field-detector, the processor further estimating the entire set of parameters of a magnetic-field-model-template according to the magnetic-flux-measurements and the respective pose-related-information the magnetic flux measurements, the processor incorporates the entire set of parameters into said magnetic field model template, thereby determining said magnetic field model, the entire set of parameters includes the coefficients, the order, the number and location of the centers of expansion of the model.

公开(公告)号：US10036799B2

公开(公告)日：2018-07-31

申请号：US15561473

申请日：2016-03-17

Applicant: ELBIT SYSTEMS LTD.

Inventor： Lior Avitan ,  Mark Gandelsman ,  Eugene Gurovich ,  Yoav Ophir

IPC: G01S5/16 ,  G01P21/00 ,  G01C25/00 ,  F41G3/32 ,  G01B11/27

CPC classification number: G01S5/163 ,  F41G3/323 ,  G01B11/272 ,  G01C25/005 ,  G01P21/00 ,  G01S5/0263

Abstract: A device for determining relative orientation between two locations including an imager, an inertial-orientation-sensor firmly attached to the imager for determining information relating to the orientation thereof and which exhibits drift and a processor coupled with the imager and with the inertial-orientation-sensor. The processor determines a first orientation-measurement and first time-tag when the device is oriented with a first-orientation-indicator located at a first location. The processor determines a second-orientation-measurement and second time-tag when the device is oriented with a second-orientation-indicator located at a second location. The processor determines a third-orientation-measurement and third time-tag when the device is oriented again with the first-orientation-indicator. The processor determines the drift associated the inertial-orientation-sensor according to difference between the first-orientation-measurement and the third-orientation-measurement the respective time-tags associated therewith. The processor determines an angle-difference between the first-orientation-indicator and the second-orientation-indicator according to the first-orientation-measurement and the second-orientation-measurement, the first and second time-tags and the drift.

公开(公告)号：US10095815B2

公开(公告)日：2018-10-09

申请号：US14249463

申请日：2014-04-10

Applicant: ELBIT SYSTEMS LTD.

Inventor： Ilan Efrat ,  Evgeni Gurovich ,  Guy Mencel ,  Yoav Ophir ,  Mark Gandelsman

IPC: G06F17/50 ,  G01R33/07 ,  G01R33/10

Abstract: A system for mapping a magnetic-field in a volume-of-interest comprising a magnetic-field transmitter, generating a magnetic-field in the volume-of-interest, a freestanding magnetic-field detector operative to freely move within the volume-of-interest, a pose-information-acquisition-module and a processor. The detector acquires measurements of flux of the magnetic-field at a plurality of poses. The pose-information-acquisition-module measures information related to the pose of the detector. The processor determines pose-related-information respective of at least a portion of the measurements according to the information related to the pose of the detector. The processor estimates the entire set of parameters of a magnetic-field model template according to the magnetic-field flux measurement and the respective poses-related-information thereof. The processor incorporates the entire set of parameters into the magnetic-field model template, thereby determining the magnetic-field model. The entire set of parameters includes the coefficients, the order the number and location of the centers of expansion of the magnetic-field model.