Laboratoire d’analyse et d’architecture des systèmes
B.ROUGIER, H.AUBERT, A.LEFRANCOIS
Manifestation avec acte : European Microwave Week ( EuMW ) 2018 du 23 septembre au 28 septembre 2018, Madrid (Espagne), Septembre 2018, 9p. , N° 18301
A millimeter-wave remote sensing technique is used here as a noninvasive and continuous approach for the real-time measurement of shock wave velocity as well as the velocity of the shocked dielectric material during an impact. Experimental results obtained from planar symmetric impacts on PolyMethyl MethAcrylate (PMMA) cylinders are discussed and demonstrate that the proposed millimeter-wave remote sensing technique is highly convenient for deriving both the velocity of the shock wave and velocity of the shocked PMMA material. The proposed approach is applicable to any dielectric material subject to an impact and is an excellent candidate for deriving the equation of state of shocked materials.
G.ALMUNEAU, B.FRANC, S.BACHELET, R.ROUSSEAU
Rapport LAAS N°18258, Septembre 2018
D.KUMAR, J.PHILIPPE, S.CHARLOT, S.ASSIE-SOULEILLE, A.LECESTRE, A.FERRAND, H.AUBERT, P.PONS
MINC, TEAM, I2C, ICA
Manifestation avec acte : Eurosensors 2018 du 09 septembre au 12 septembre 2018, Graz (Autriche), Septembre 2018, 4p. , N° 18277
In this paper, the out-gassing from PolyEthylene (PE) film is studied under nuclear irradiation for the design and fabrication of passive MEMS dosimeters. The fabrication of sensor needs high temperature process that leads to specific constraints on the PE film. Radiation chemical yield of hydrogen production (G H2) from PE under gamma irradiation is verified by mass spectroscopy after temperature annealing in vacuum up to 400°C. Prototypes are fabricated to validate the fabrication of the sensor and then irradiated with high energy gamma radiation (with dose of 20 kGy). Measurements of membrane deflections after irradiation validate the G H2 factor, showing low pollution level of PE during sensor fabrication.
J.VEYRUNES, J.RIONDET, A.FERRAND, M.LAVAYSSIERE, J.LUC, H.AUBERT, P.PONS
ICA, MINC, CEA-DAM
Manifestation avec acte : Eurosensors 2018 du 09 septembre au 12 septembre 2018, Graz (Autriche), Septembre 2018, 4p. , N° 18276
The development of new ultra-fast sensors for pressure air blast monitoring requires taking into account the very short rise time of pressure occurring during explosion. Simulations show here that the dynamic mechanical behavior of membrane-based sensors depends significantly on this rise time when the fundamental mechanical resonant frequency of the membrane is higher than 10 MHz.
I.ARDI, H.CARFANTAN, S.LACROIX, A.MONMAYRANT
PHOTO, IRAP, RIS
Manifestation avec acte : European Signal Processing Conference ( EUSIPCO ) 2018 du 03 septembre au 07 septembre 2018, Rome (Italie), Septembre 2018, 5p. , N° 18238
We consider the problem of hyperspectral cube reconstruction with a new controllable imaging system. The reconstruction with a small number of images acquired with different configurations of the imager avoids a complete scanning of the hyperspectral cube. We focus here on a quadratic penalty reconstruction approach, which provides a fast resolution thanks to the high sparsity of the involved matrices. While such a regu-larization is known to smooth the restored images, we propose to exploit the system capability to acquire the panchromatic image of the scene, to introduce prior information on the sharp edges of the image, leading to a fast and edge-preserved reconstruction of the image.
J.PHILIPPE, R.DE PAOLIS, C.ARENAS BUENDIA, D.HENRY, A.COUSTOU, A.RUMEAU, H.AUBERT, P.PONS
Revue Scientifique : Sensors and Actuators A: Physical, Vol.279, pp.753-762, Août 2018 , N° 18201
A new microwave fully passive, chipless and packaged sensor for wireless pressure monitoring in harsh environments (such as, extreme temperature, radioactive and/or toxic environments) is proposed in this paper. The sensor consists of a planar microstrip resonator, which is electromagnetically coupled with a high resistivity and thin silicon membrane. Prototypes have been designed and fabricated using a photoresist intermediate layer for the silicon membrane bonding. The electromagnetic simulation of the system is also performed in order to predict the transducer performances. Measurement results using the packaged sensor are provided to experimentally validate the simulation results and the manufacturing process.
L.CIOTIRCA, O.BERNAL, J.ENJALBERT, T.CASSAGNES, H.TAP, H.BEAULATON, S.SAHIN
OSE, NXP -Semiconductors, ENSEEIHT
Revue Scientifique : IEEE Sensors Journal, Vol.18, N°15, pp.6106-6114, Août 2018 , N° 18298
Over the past years, cutting-edge advances in electronics and microfabrication have allowed the integration of multiple sensors within integrated analog and digital circuits to design Micro Electro Mechanical Systems (MEMS). The multiple sensor integration or sensor fusion, enables both cost and surface reduction, while maintaining high performances. This paper presents a new control system for an underdamped three-axis accelerometer, which allows the co-integration in the same cavity with a three-axis Coriolis gyroscope, to design a Six Degrees of Freedom (DoF) combo sensor. The accelerometer Analog Front End (AFE) consumes from a. power supply and is able to reach its steady state in compared to a open-loop and no damping configuration. The transducer control is implemented using a simultaneous multirate electrostatic damping method. To conclude on the closed loop system stability, an innovative approach, based on the multirate signal processing, theory has been developed.
B.ROUGIER, A.LEFRANCOIS, H.AUBERT, E.BOUTON, J.LUC, A.OSMONT, Y.BARBARIN
MINC, CEA-DAM, CEA/Gramat
Manifestation avec acte : International Detonation Symposium ( DetSymp ) 2018 du 15 juillet au 20 juillet 2018, Cambridge (USA), Juillet 2018, 7p. , N° 18300
Microwave interferometry has been applied to study the shock initiation response of TATB-based HE samples in order to perform the simultaneous measurement of the shock and particle velocities. The particle velocity characterization is not possible with the standard phase method. Therefore the new analytic electromagnetic wave propagation method, based on the Doppler frequency shifts of reflecting moving dielectric interfaces, has been developed and applied to the single sustained shock experiment. The experimental results are compared with hydrocode numerical simulations and a good agreement is observed.
A.LY, V.AUROUX, R.KHAYATZADEH, N.GUTIERREZ PANOZZO, A.FERNANDEZ , O.LLOPIS
Revue Scientifique : IEEE Photonics Technology Letters, Vol.30, N°14, pp.1313-1316, Juillet 2018 , N° 18272
A 90 GHz frequency reference is synthesized through harmonic generation from a 30 GHz coupled optoelectronic oscillator. The 30 GHz signal and its third harmonic feature an average power level of −5.6 dBm and −15.8 dBm respectively at the photodiode output. Phase noise measurements at 30 GHz and 90 GHz have been performed and phase noise levels as low as −114.4 dBc/Hz at 1 kHz offset for the fundamental and −104 dBc/Hz at 1 kHz offset frequency for the 90 GHz signal have been obtained.
B.ROUGIER, H.AUBERT, A.LEFRANCOIS
Manifestation avec acte : International Symposium on Antennas and Propagation ( IEEE-APS ) 2018 du 08 juillet au 14 juillet 2018, Boston (USA), Juillet 2018, 3p. , N° 18302