公开(公告)号：US09663200B2

公开(公告)日：2017-05-30

申请号：US14436621

申请日：2013-10-16

Applicant: IXBLUE

Inventor： Fabien Napolitano

IPC: B63B49/00 ,  G01C21/16 ,  G01C21/20

CPC classification number: B63B49/00 ,  G01C21/16 ,  G01C21/203

Abstract: A system and a method for the navigation of a mobile vehicle, suitable for determining and displaying a safe navigation zone for the mobile vehicle. The navigation system includes a dead reckoning navigation system (10), a calculator (50), a storage memory (60), an embedded sensor (20), and an electronic mapping system (70). The calculator (50) is suitable for calculating an estimated position of the mobile vehicle from speed and/or acceleration measurements and a comparison of the measurement of an environmental parameter with a geographical database. The calculator (50) is suitable for calculating the probability density of the presence of the mobile vehicle around each point on the map in order to deduce a safety zone (12) corresponding to a presence probability higher than, or equal to, a pre-determined threshold p.

公开(公告)号：US11199624B2

公开(公告)日：2021-12-14

申请号：US15774970

申请日：2016-11-09

Applicant: IXBLUE

Inventor： Fabien Napolitano ,  Didier Charlot

IPC: G01S15/89 ,  G01S7/481 ,  G01S7/497 ,  G01S17/89 ,  G01S19/42

Abstract: Disclosed is a bathymetric system including a multi-beam emitting and receiving device attached to a carrier vehicle, configured, in a first recurrence, to measure the amplitude of a first plurality of beams reflected off the seabed, and a computer to determine three-dimensional spatial coordinates of a first scan swath. In a second recurrence, the device emits a second incident beam and measures the amplitude of a second plurality of beams reflected off the seabed, the computer determines the three-dimensional spatial coordinates of a second scan swath, so that at least one probe point of the first scan swath is redundant with a probe point of the second scan swath, and the computer calculates an altitude variation of the carrier vehicle using altitude variations of the at least one redundant probe point between the first recurrence and the second recurrence.

公开(公告)号：US11280618B2

公开(公告)日：2022-03-22

申请号：US16567257

申请日：2019-09-11

Applicant: iXblue

Inventor： Sophie Glevarec ,  Jean-Philippe Michel ,  Fabien Napolitano ,  Guillaume Picard ,  Martin Puchol

IPC: G01C21/20 ,  G01S19/47

Abstract: Disclosed is a positioning system including: several inertial measurement units; at least one common sensor, providing a measurement of a positioning parameter of a system; for each inertial measurement unit, a navigation filter configured to: a) determine an estimate of the positioning parameter, on the basis of an inertial signal provided by the inertial measurement unit; and to b) correct the estimate, as a function of the measurement and of a correction gain that is determined on the basis of an augmented variance higher than the variance of a measurement noise of a common sensor; and—at least one fusion module determining a mean of the estimates, the mean being not reinjected at the input of the navigation filters. Also disclosed is an associated positioning method.

公开(公告)号：US11175139B2

公开(公告)日：2021-11-16

申请号：US16488398

申请日：2018-02-23

Applicant: IXBLUE ,  INSTITUT D'OPTIQUE GRADUATE SCHOOL ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  UNIVERSITE DE BORDEAUX

Inventor： Brynle Barrett ,  Baptiste Battelier ,  Philippe Bouyer ,  Fabien Napolitano

IPC: G01C19/58 ,  G01C21/16 ,  G01C19/64

Abstract: Disclosed is a hybrid inertial measurement system including a cold atom interferometric inertial sensor having a laser source generating a sequence of laser pulses towards a cold atom burst and a conventional inertial sensor attached to the inertial reference frame of the interferometric inertial sensor. The hybrid system includes a signal processing system suitable for receiving an inertial measurement signal from the conventional inertial sensor and for generating in real time a non-linear frequency modulation signal, the feedback loop electronic system being configured to modulate in real time the central optical frequency of the laser according to the modulation signal, such that the cold atom interferometric inertial sensor generates a first hybrid inertial measurement signal by atomic interferometry corrected for the relative movements of the inertial reference frame.