-
公开(公告)号：US20210055368A1
公开(公告)日：2021-02-25
申请号：US16962185
申请日：2019-01-21
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Nicolas CAPET , François-Xavier MARMET
Abstract: There is disclosed a system for locating an object on a surface waveguide. The surface waveguide is made of one or more 1D wires and/or 2D waveguides comprising conductive elements arranged in patterns. Emitters with known positions can couple with receivers coupled with the surface waveguide. The position of receivers can be determined, for example by multilateration or signal strength indication. Conductive elements can be sprayed or sewed or otherwise deposited onto surfaces such as a ground floor, a sidewalk or a road lane. Described developments comprise the use of absorbers, protective layers, unidirectional emitters, contactless coupling, and various arrangements comprising frequency-selective layers, arrangements in lattices, trellis or anisotropic surfaces. Signal processing aspects and software embodiments are also described.
-
公开(公告)号：US20200284918A1
公开(公告)日：2020-09-10
申请号：US16762924
申请日：2018-11-14
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Nicolas CAPET , François-Xavier MARMET
Abstract: An add-on device configured to reduce the power level of reflected paths of GNSS signals reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals are provided. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization.
-
23.发明授权公开(公告)号：US10605927B2
公开(公告)日：2020-03-31
申请号：US15936704
申请日：2018-03-27
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： François-Xavier Marmet , Nicolas Capet
IPC: G01C15/00 , G01S19/10 , G01S19/46 , G05D1/02 , G01S5/10 , H04W4/00 , G01S19/14 , G05D1/10 , G01S19/11 , G01S1/00 , B64C39/02 , H04W4/02 , G01S1/70 , H04W4/40 , G01S1/68
Abstract: The invention discloses a constellation of relay vehicles comprising a receiver of navigation signals and a transmitter of positioning signals to an area of service where a number of rovers manoeuver, wherein the position of the relay vehicle may be adjusted to optimize one or more of an SNR or a DOP index of the positioning signals. In some embodiments, the optimal configuration of the constellation of relay vehicles may be further defined based on priority indexes allocated to the rovers. The invention is applicable to terrestrial or underwater rovers, respectively serviced by aerial or nautical relay vehicles.
-
公开(公告)号：US10288523B2
公开(公告)日：2019-05-14
申请号：US15685832
申请日：2017-08-24
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Jean-Marc Delvit , Christophe Latry , Carole Thiebaut , Gwendoline Blanchet
Abstract: The invention relates to a method and device for characterizing at least one optical aberration of an optical system of an image acquisition device, the optical system having an associated optical transfer function that is dependent on the aberrations, the image acquisition device being capable of acquiring at least two images in a field of image capture in a manner so as to introduce a differential aberration between the two images, each image being defined by a digital image signal. The method includes the obtaining (50) of a first image and a second image of a same given zone of the field of image capture, the second image being acquired with a differential aberration (Δaberr) relative to the first image, each image acquisition having an associated optical transfer function. An optical aberration is characterized (58, 60) by the calculation of at least one parameter by minimization of a functional expressed as a function of the first and second images acquired, from a modelling of the optical transfer functions associated with the two image acquisitions dependent on the aberrations of the image acquisition device as well as on the differential aberration (Δaberr).
-
公开(公告)号：US10224616B2
公开(公告)日：2019-03-05
申请号：US15113640
申请日：2015-01-21
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES , MVG Industries , FLYOPS
Inventor： Luc Duchesne , Xavier Joussaume , Patrick Dumon
Abstract: The invention relates to a communication device for arranging in an aircraft cabin, said device comprising: an antennae assembly designed so as to emit and receive communication data in a first frequency band of a communication network and to receive localization data in a second frequency band of a localization network, said antennae assembly comprising an antenna having a pattern of radiation revolving about a main axis, the radiation being at its maximum in the direction of said main axis, and a system for restraining the radiation, designed to limit the radiation outside said antenna axis; a modem connected to the antenna, designed so as to allow the emission and the reception of communication data via a communication network; and a localization data receiver.
-
Patent Agency Ranking
公开(公告)号：US10207825B2
公开(公告)日：2019-02-19
申请号：US15108780
申请日：2014-12-24
Inventor： Raphaël Hache , Bruno Trancart , Andrew Walker
Abstract: A telecommunications satellite stabilized on three axes includes a set of dissipative equipment constituting a payload of the satellite. The satellite includes support data transmission antennas and is substantially parallelepipedal in shape with the panels forming two opposite faces, east and west faces. The panels form two additional opposite faces, north and south faces, and include radiator surfaces on their external faces. The radiator surfaces are configured to cool the electronic equipment of the satellite. The equipment installed on the north and south panels dissipate thermal power corresponding to less than 25% of the total dissipated power.
-
公开(公告)号：US10088649B2
公开(公告)日：2018-10-02
申请号：US15422030
申请日：2017-02-01
Applicant: THALES , CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Christophe Devilliers , Félix Aguilar , Kamel Houairi , Aurélien Suau
Abstract: A deformable mirror comprises a deformable membrane extending at rest in a first plane and having a reflecting front face and a back face opposite the front face, a supporting structure, an actuator having a first and second end, the first end fixed to the supporting structure, the second end displaced relative to the first end on a first axis substantially at right angles to the first plane to exert, on the back face, an axial load on the first axis, to locally deform the deformable membrane. The mirror comprises a plate that is substantially flat in a second plane substantially parallel to the first plane, positioned between the actuator and deformable membrane, linked to the back face and deformed when the actuator exerts the axial load, and the plate is rigid in the second plane to take up loads applied to the mirror in the second plane.
-
公开(公告)号：US09854546B2
公开(公告)日：2017-12-26
申请号：US14413498
申请日：2013-07-10
Applicant: Centre National d'Etudes Spatiales
Inventor： Thomas Grelier , Lionel Ries
CPC classification number: H04W56/001 , G01S19/02 , G01S19/21 , G01S19/24 , H04L7/04
Abstract: A global navigation satellite system (“GNSS”) positioning method is provided, based upon a GNSS radio signal that comprises a navigation message transmitted as a succession of data packets. Each data packet is present in the GNSS radio signal as a sequence of symbols obtained by application of a code preceded by a synchronization symbol header. The data packets are organized internally into data fields. At least certain data packets of the succession of data packets contain a synchronization bit field translated by application of the code into a synchronization symbol pattern.
-
29.发明申请公开(公告)号：US20170307761A1
公开(公告)日：2017-10-26
申请号：US15508296
申请日：2015-09-02
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Gaël SCOT , Denis LAURICHESSE
Abstract: The positioning signals broadcast by GNSS constellations are affected by significant errors, notably due to the crossing of the ionospheric layer or of the tropospheric layer. Several unwieldy means have been deployed to provide professional users with corrections of said errors. These means, however, all require the knowledge of at least one precise reference point at a given distance. According to the invention, positioning receivers that are not very precise, such as smartphones, present in a geographical zone, of unknown precise position, can contribute to the production of precise atmospheric error corrections if said receivers are sufficiently numerous.
-
公开(公告)号：US20170104463A1
公开(公告)日：2017-04-13
申请号：US15287598
申请日：2016-10-06
Applicant: THALES , CENTRE NATIONAL D'ETUDES SPATIALES (CNES)
Inventor： Eva Maria GONZALEZ ESTEBAN , Philippe VOISIN , Aline BRIAND , Bertrand ONILLON , Jean-Philippe TAISANT
CPC classification number: H03F5/00 , H03F1/0277 , H03F1/18 , H03F1/526 , H03F3/189 , H03F3/24 , H03F3/245 , H03F3/60 , H03F3/602 , H03F3/605 , H03F3/607 , H03F2200/249 , H03F2200/414 , H04B1/74 , H04B7/18515 , H04B2001/0408
Abstract: A distributed amplification device with p inputs, p outputs, p amplification paths comprises a redundant reservoir of n amplifiers including n-p back-up amplifiers, an input redundancy ring and an output redundancy ring formed by rotary switches, the input and output redundancy rings sharing the same technology. The internal amplification pathways associated with the n-p back-up amplifiers frame in an interlaced manner the internal amplification pathways associated with the p nominal amplifiers and the amplification paths of the routing configurations each pass through at least five rotary switches. The input and output redundancy rings are topologically and geometrically configured and the family of the routing configurations is chosen such that the electrical lengths of all the paths of one and the same routing configuration of the family are equal.
-
-
-
-
-
-
-
-
-
Search Results
1545
records
(took 0.04 seconds)
