公开(公告)号：WO2021165189A1

公开(公告)日：2021-08-26

申请号：PCT/EP2021/053608

申请日：2021-02-15

Applicant: IMEC VZW ,  UNIVERSITEIT GENT

Inventor： LI, Yanlu ,  BAETS, Roeland

IPC: G01N29/24 ,  G01N21/17

Abstract: System (300) for photoacoustic inspection of an object (10). The system comprises: a broadband emission source (305) configured to generate an emission beam (3151,..., 315N); a direction apparatus (320) comprising at least one spectrum splitter (340) configured to split the emission beam into at least a first and a second component (3451,..., 345M), the direction apparatus being configured to sequentially direct the respective components to N respective locations (1511,..., 15N1,...,15M1,..., 15NM) on the object at N times to generate N respective acoustic waves within the object, wherein the N respective locations and N times are such that the respective N acoustic waves at least semi-constructively interfere to generate a respective propagating acoustic wave (201,..., 20M) within the object; and a vibration sensing system (330) configured to detect said respective propagating acoustic waves at a respective detection location (251,..., 25M) on the object. As the propagating acoustic waves have an amplitude that is greater than any one of the plurality of acoustic waves, it is easier to detect by the vibration sensing system thereby improving the SNR.

公开(公告)号：WO2021099369A1

公开(公告)日：2021-05-27

申请号：PCT/EP2020/082506

申请日：2020-11-18

Applicant: UNIVERSITEIT GENT ,  IMEC VZW

Inventor： PAVANELLO, Fabio ,  VAN THOURHOUT, Dries ,  BAETS, Roeland

IPC: G02B6/12 ,  G01J3/02 ,  H01S5/026 ,  G02B6/42

Abstract: A temperature compensation method for wavelength monitoring using spectrometers (33) on photonic integrated chips (1) and a related temperature-compensated wavelength monitoring device (51) are disclosed. An optical filter (42a-b) of the chip (1) filters a source (6) signal to provide at least one spectral reference line to a first spectrometer (33) to detect thermal wavelength drifts thereof. At least one spectral line to be monitored is received by the same or another spectrometer (33) of the chip to detect wavelength shifts thereof. To obtain a compensation value accounting for a change in temperature, the detected thermal drift of the reference line is compared to calibrated thermal drifts for the reference line which is associated with a calibrated thermal drift for the spectral response curve of the spectrometer receiving the spectral line to be monitored. A thermal drift rate for the response curve of the optical filter differs from a thermal drift rate for the response curve of the first spectrometer at least by an amount such that, over the entire range of operating temperatures of the photonic integrated chip (1), an effective resolving power associated with the spectrometer (33) receiving the spectral line to be monitored is at least 50% of a nominal resolving power in respect of that same spectrometer (33).

公开(公告)号：WO2021044041A1

公开(公告)日：2021-03-11

申请号：PCT/EP2020/074880

申请日：2020-09-04

Applicant: IMEC VZW ,  UNIVERSITEIT ANTWERPEN ,  UNIVERSITEIT GENT

Inventor： SHAHID, Adnan ,  FONTAINE, Jaron ,  DE POORTER, Eli ,  MOERMAN, Ingrid ,  CAMELO, BOTERO, Miguel, Hernando ,  LATRÉ, Steven

IPC: G06N3/04

Abstract: Example embodiments describe a computer-implemented method for providing a neural network for identifying radio technologies (200-203) employed in an environment, the neural network comprising an autoencoder having an encoder, and a classifier, the method comprising the steps of sensing a radio spectrum of the environment thereby obtaining a set of data samples, labelling a subset of the data samples by a respective radio technology thereby obtaining labelled data samples, training the autoencoder in an unsupervised way by unlabelled data samples, training the classifier in a supervised way by the labelled data samples, and providing the neural network by coupling the output of an encoder network of the autoencoder to an input of the classifier.

公开(公告)号：WO2020239582A1

公开(公告)日：2020-12-03

申请号：PCT/EP2020/064098

申请日：2020-05-20

Applicant: IMEC VZW ,  UNIVERSITEIT ANTWERPEN

Inventor： BELLEKENS, Ben ,  BERKVENS, Rafael ,  DENIS, Stijn ,  WEYN, Maarten

IPC: G08B13/24

Abstract: According to an embodiment, a method is disclosed for estimating movements (140) of a crowd (110-111) between a first (100) and second (101) subregion in an area (130) monitored by a wireless sensor network, the wireless sensor network comprising nodes (102-105) configured to exchange a radio frequency signal through a first (132-133) respective second (130-131) link, wherein the first (132-133) respective second (130-131) link crosses the first (100) respective second (101) subregion, the method comprising the steps of exchanging radio frequency signals over the first (132-133) and second (130-131) link; and measuring respective first and second attenuations of the exchanged radio frequency signals over the first (132-133) respective second (130-131) link; and estimating based on a change in the attenuations a flow (120) of the crowd (110-112) between the first and second subregion; and wherein the estimating further comprises estimating based on the first and second attenuations a density of the crowd (110-112) in the first (100) respective second (101) subregion; and estimating based thereon a flux (140) of the crowd (110-112) between the first (100) and second (112) subregion.

公开(公告)号：WO2020157022A1

公开(公告)日：2020-08-06

申请号：PCT/EP2020/051960

申请日：2020-01-27

Applicant: UNIVERSITEIT GENT ,  IMEC VZW ,  VMICRO SAS ,  CNRS ,  ISEN YNCRÉA HAUTS-DE-FRANCE ,  UNIVERSITÉ DE LILLE ,  ECOLE CENTRALE DE LILLE ,  UNIVERSITÉ POLYTECHNIQUE HAUTS-DE-FRANCE

Inventor： KUYKEN, Bart ,  VANWOLLEGHEM, Mathias ,  VERSTUYFT, Mattias ,  WALTER, Benjamin ,  LAMPIN, Jean-François

IPC: G01N21/17

Abstract: An integrated photoacoustic transducer, sensing system and method for assisting in sensing a concentration of a species (108) in a fluid are disclosed. The integrated photoacoustic transducer comprises a waveguide structure (101) which is configured as an optical resonator for enhancing a modulated radiation signal. The waveguide structure (101) has an optical resonance which is spectrally overlapping a spectral absorption line or band of the species. The photoacoustic transducer further comprises at least one acoustic cavity (104) formed in a portion of the waveguide structure (101) and configured for receiving the fluid for sensing comprising the species. The at least one acoustic cavity (104) has an acoustic resonance which is spectrally overlapping with a harmonic of a modulation frequency. At least one acoustic transducer comprising a deformable mechanical portion (205) is also included in the photoacoustic transducer. The deformable mechanical portion (205) is in direct acoustic communication with the at least one acoustic cavity (104) and has an adjustable mechanical resonance, which can be brought into spectral overlap with an acoustic resonance of the least one acoustic cavity (104).

公开(公告)号：WO2020078861A1

公开(公告)日：2020-04-23

申请号：PCT/EP2019/077672

申请日：2019-10-11

Applicant: UNIVERSITEIT GENT ,  IMEC VZW

Inventor： TORFS, Guy ,  RAMON, Hannes ,  YIN, Xin

IPC: H03M1/66 ,  H03M1/08

Abstract: An interleaver (100) for combining at least two incoming signals into an analog output signal which comprises at least a first signal path (110) and a second signal path (120). Each signal path (110, 120) comprises: an input terminal (111, 121), a first gain stage (113, 123) for multiplying a signal coming from the input terminal with a first gain (a) to obtain a first signal, a mixer (112, 122) and a second gain stage (114, 124) for multiplying a signal coming from the input terminal with a second gain (b) before or after mixing it with a clock signal to obtain a second signal, an adder (115, 125) for adding the first and second signal to obtain an output signal of the signal path wherein the first and second gain are different from zero. The interleaver comprises an adder (140) for adding the output signals from the signal paths.

公开(公告)号：WO2020002704A1

公开(公告)日：2020-01-02

申请号：PCT/EP2019/067584

申请日：2019-07-01

Applicant: UNIVERSITEIT ANTWERPEN ,  IMEC VZW

Inventor： DE BEENHOUWER, Jan ,  SIJBERS, Jan

IPC: G01N23/04

Abstract: A method, system, use, and computer program product for inspection of an item are disclosed. The method (1) comprises acquiring (2) a projection image of the item using a radiation imaging system and obtaining (3) a plurality of simulated projection images of the item or a component thereof, based on a simulation of a numerical three-dimensional model, in which at least one geometric parameter relating to the relative orientation between the simulated item, a simulated radiation source, and a simulated detection plane varies over the plurality of simulated images. The method comprises determining (4) a relative orientation of the item with respect to the imaging system, said determining of the relative orientation comprises comparing (9) the projection image to the plurality of simulated images. The method comprises determining (5) at least one angle of rotation taking a viewing angle and the relative orientation into account, moving (6) the item and/or the imaging system in accordance with the at least one angle of rotation and acquiring (7) a further projection image of the item, after moving the item, such that the further projection image corresponds to a view of the item from the viewing angle.

公开(公告)号：WO2019149758A1

公开(公告)日：2019-08-08

申请号：PCT/EP2019/052261

申请日：2019-01-30

Applicant: IMEC VZW

Inventor： ROTTENBERG, Xavier ,  LODEWIJKS, Kristof

IPC: G02F1/01 ,  G03H1/00 ,  G03H1/02

CPC classification number: G02F1/0147 ,  G02F2203/10 ,  G02F2203/50 ,  G02F2203/60 ,  G03H1/00 ,  G03H2001/0224 ,  G03H2225/12 ,  G03H2225/32

Abstract: An optical device for forming a distribution of a three-dimensional light field comprises: an array of individually addressable unit cells; each unit cell in the array of unit cells comprising a stack including: at least one electrode; and a resonance defining layer, comprising at least a phase change material, PCM, layer, wherein the resonance defining layer is patterned to define a geometric structure dimensioned for defining a wavelength-dependent in- plane resonance of an electromagnetic wave; wherein the at least one electrode causes a phase change of the phase change material based on receiving a control signal to alter a wavelength-dependency of resonance in the resonance defining layer for controlling the optical property of the unit cell; wherein unit cells in the array of unit cells are separated such that the PCM layer of a unit cell is separated from the PCM layer in an adjacent unit cell.

公开(公告)号：WO2019129798A1

公开(公告)日：2019-07-04

申请号：PCT/EP2018/086899

申请日：2018-12-31

Applicant: UNIVERSITEIT GENT ,  IMEC VZW

Inventor： BAETS, Roeland ,  RYCKEBOER, Eva ,  RAHIM, Abdul ,  VASILIEV, Anton ,  NIE, Xiaomin

IPC: G02B6/124 ,  G01J3/02 ,  G01J3/18 ,  G02B6/293

CPC classification number: G02B6/12007 ,  G01J3/1895 ,  G01J3/22 ,  G01J3/36 ,  G02B6/124 ,  G02B6/29326 ,  G02B6/29328 ,  G02B6/29398

Abstract: An integrated wavelength-selective filter device (10; 20; 30; 40) comprises a first optical element (14) for directing received radiation into a direction defined by a first angle (α), and a second optical element (15) being a diffractive element configured diffracting said directed radiation under a second angle. The second angle is such that for a single reference wavelength the diffracted radiation is directed into a propagation medium for advancing therein towards a predetermined position on the first optical element or on a further optical element (14a) for filtering radiation having a wavelength substantially matching the reference wavelength from radiation having a substantially different wavelength. The propagation medium is formed from a material that is different from any material of the substrate of the first and the second optical element.

公开(公告)号：WO2019129631A1

公开(公告)日：2019-07-04

申请号：PCT/EP2018/086141

申请日：2018-12-20

Applicant: IMEC VZW

Inventor： LIU, Chengxun

IPC: B01L3/00

CPC classification number: B01L3/502715 ,  B01L3/502746 ,  B01L3/502761 ,  B01L2200/028 ,  B01L2200/143 ,  B01L2300/0627

Abstract: A method (1) for detecting, sorting, purifying and/or characterizing objects of interest in a liquid sample. The method comprises preparing (3), in a preparation module (120) of a microfluidic router system (100), the liquid sample for processing, wherein said preparing comprises transporting the sample through a microfluidic channel, and forwarding (4) the prepared sample from an outlet of the preparation module (120) into an inlet of a routing module (105). This forwarding comprises coupling a microfluidic flow between the outlet and the inlet to passively buffer against and/or actively compensate for variations in a flow rate of the prepared sample at the outlet, and diverting (5), in the routing module, the objects of interest from the microfluidic flow. Forwarding the sample comprises sensing (6) a flow characteristic of the sample in the preparation and/or routing module and/or in a flow connection therein between, and controlling (7) a flow control element taking the sensed characteristic into account to compensate for a variation in the flow rate by a closed-loop flow control.