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Laboratoire d’analyse et d’architecture des systèmes
Publications de l'équipe S4M
45documents trouvés
Design and evaluation of a smart insole: application for continuous monitoring of frail people at home
Y.CHARLON, E.CAMPO, D.BRULIN
S4M
Revue Scientifique : Expert Systems with Applications, Vol.95, pp.57-71, Avril 2018, DOI https://doi.org/10.1016/j.eswa.2017.11.024 , N° 17094
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Abstract
The objectives of this work are to develop a technological solution designed to support active aging of frail older individuals and to conduct a first evaluation of the devices. We wish to bring a reflection in the field of connected health by setting up a remote medical follow-up. In this context, the connected object presented in this article aims at implementation a longitudinal follow-up of the walk by a health professional. Continuous remote data analysis applies behavior learning methods by modeling walking habits and allows the detection of deviations by application of thresholds defined by the expert. We propose an instrumented shoe insole to provide such monitoring (number of steps, distance covered and gait speed). In this perspective, we designed a low power microelectronic device integrated into the thickness of an insole in order to demonstrate the technical feasibility of such a device in laboratory and in living conditions. The project called “FOOT-TEST” is funded by the DIRECCTE of the Midi-Pyrenees Region in France. This project brought together a manufacturer who specializes in the design of foot-care systems, geriatricians and our laboratory specialized in electronics to propose a technical solution adapted to frail individuals. Two smart insole prototypes have been produced and a first evaluation of the smart insole in real use conditions has been performed. According to user feedback, the smart insole seems to be much easier to use than commercial connected pedometers. Moreover, in terms of performance, the smart insole provides better results. In this paper, we present specifications of the device, technological choices and the design of two versions of the smart insole, methods used to measure desired settings, a first evaluation of the system and, finally, preliminary conclusions and work in progress.
Approche méthodologique pluridisciplinaire pour l'observation de la prise en main de technologies numériques par des personnes âgées
N.VIGOUROUX, E.CAMPO, C.GRIMAUD, F.VELLA, E.BOUGEOIS
IRIT-UPS, S4M, AG2R La Mondiale, LERASS
Ouvrage (contribution) : Des services à la personne à la silver économie Comment accompagner le vieillissement de la population à domicile sur les territoires aujourd'hui et demain ?, éditions ems, N°ISBN 9791094033142, Décembre 2017, Chapitre 5, pp.103-120 , N° 17097
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Résumé
Les enjeux liés au vieillissement de la population sont désormais considérables pour notre pays puisque à l’horizon 2060, les personnes de 60 ans et plus pourraient représenter près de 30 % de la population totale selon Blanpain et Chardon (2010), soit plus de 20 millions d’individus. Même si l’espérance de vie et la qualité de vie se sont très fortement améliorées par rapport à l’après-guerre, cela pose et va poser plusieurs questions notamment : comment permettre le maintien à domicile des personnes âgées, de celles qui sont en perte d’autonomie voire dépendantes ? Le secteur des services à la personne se situe à un moment charnière de son évolution, en raison de la mise en oeuvre de la loi relative à l’Adaptation de la Société au Vieillissement (ASV) au cours de l’année 2016, laquelle cherche à apporter des réponses aux transformations démographiques actuellement en cours dans notre pays. Compte tenu de la complexité des enjeux que le vieillissement de la population soulève, il nous a semblé nécessaire de pouvoir croiser différents points de vue, compétences et expérimentations en suscitant un dialogue entre des disciplines scientifiques variées mais aussi avec des praticiens "du domicile". Dans ce sens, nous avons mis en place un comité éditorial qui a réuni 33 enseignants-chercheurs et professionnels, dont l’expertise a permis de couvrir les principales problématiques rencontrées par le secteur des services à la personne et, de manière plus large, la Silver Economie, gage, par là même, de la rigueur et de la qualité des chapitres présentés dans ce livre. Dans cet ouvrage, vous trouverez 8 chapitres qui ont été rédigés par 21 auteurs professionnels, enseignants-chercheurs et/ou docteurs concernant cinq grandes thématiques qui sont : les conditions de travail et la conciliation emploi-famille pour les métiers d’intervention au Québec ; la construction de parcours et la gouvernance de réseaux sur les territoires ; la professionnalisation de l’encadrement et du management des structures de services à la personne ; le recours aux gérontechnologies pour favoriser le maintien à domicile ; les limites d’appropriation voire les questions déontologiques, éthiques et juridiques que pose l’utilisation des gérontechnologies au domicile.
A Study about Kalman Filters Applied to Embedded Sensors
A.VALADE, P.ACCO, P.GRABOLOSA, J.Y.FOURNIOLS
S4M, IMERIR
Revue Scientifique : Sensors, Vol.17, N°2, 2810p., Décembre 2017 , N° 17522
Lien : https://hal.archives-ouvertes.fr/hal-01694026
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Abstract
Over the last decade, smart sensors have grown in complexity and can now handle multiple measurement sources. This work establishes a methodology to achieve better estimates of physical values by processing raw measurements within a sensor using multi-physical models and Kalman filters for data fusion. A driving constraint being production cost and power consumption, this methodology focuses on algorithmic complexity while meeting real-time constraints and improving both precision and reliability despite low power processors limitations. Consequently, processing time available for other tasks is maximized. The known problem of estimating a 2D orientation using an inertial measurement unit with automatic gyroscope bias compensation will be used to illustrate the proposed methodology applied to a low power STM32L053 microcontroller. This application shows promising results with a processing time of 1.18 ms at 32 MHz with a 3.8% CPU usage due to the computation at a 26 Hz measurement and estimation rate
Diamond Schottky diodes operating at 473 K
R.MONFLIER, K.ISOIRD, A.CAZARRE, J.TASSELLI, A.SERVEL, J.ACHARD, D.EON, M.J.VALDIVIA BIRNBAUM
ISGE, S4M, IBS, LSPM, NEEL
Revue Scientifique : EPE Journal, Vol.27, N°3, pp.118-124, Octobre 2017, DOI 10.1080/09398368.2017.1388625 , N° 17387
Lien : https://hal.laas.fr/hal-01618095
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Abstract
In this paper, we present current-voltage characteristics of vertical and pseudo-vertical Diamond Schottky diodes operating up to 473 K. The functionality rate is greater than 75% for each samples. For vertical diodes, current density at 473 K reaches 488 A/cm², while it is greater than 1000 A/cm² for pseudo-vertical diodes. Under reverse bias, the leakage current is less than 10−7 A/cm² at 50 V for all functional diodes. However, the high barrier height and high non-ideality factor observed are probably caused by high charges at the Diamond/Schottky contact interface. This article emphasizes the high reproducibility of the characteristics and the functionality rate at 473 K.
Preliminary study: IMU system validation for real-time feedback on swimming technique
X.TOLZA, G.SOTO ROMERO, J.Y.FOURNIOLS, P.ACCO
S4M
Revue Scientifique : Computer Methods in Biomechanics and Biomedical Engineering, Vol.20, pp.203-204, Octobre 2017 , N° 17521
Lien : https://hal.archives-ouvertes.fr/hal-01693893
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142434Laparoscopy's gestures assessment: a construct study for the validation of an instrumented glove
G.THOMAS, J.D.LEMOS, G.SOTO ROMERO, J.Y.FOURNIOLS, A.M.HERNANDEZ
Franche-Comté, Antioquia, S4M
Manifestation avec acte : Eurosensors 2017 du 03 septembre au 06 septembre 2017, Paris (France), Septembre 2017, 4p. , N° 17286
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140773Validity, sensitivity, reproducibility and robustness of the powertap, stages and garmin vector power meters in comparison with the SRM device
A.BOUILLOD, J.PINOT, G.SOTO ROMERO, W.BERTUCCI, F.GRAPPE
S4M, C3S, UFR STAPS, Reims
Revue Scientifique : International Journal of Sport Physiology and Performance, Vol.12, N°8, pp.1023-1030, Septembre 2017, https://doi.org/10.1123/ijspp.2016-0436 , N° 17161
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Abstract
A large number of power meters were produced on the market for nearly 20 years and according to user requirements. Purpose: This study aimed to determine the validity, sensitivity, reproducibility and robustness of the Powertap (PWT), Stages (STG) and Garmin Vector (VCT) power meters in comparison with the SRM device. Methods: A national-level male competitive cyclist was required to complete three laboratory cycling tests that included a sub-maximal incremental test, a sub-maximal 30-min continuous test and a sprint test. Two additional tests were performed: the first on vibration exposures in the laboratory and the second in the field. Results: The VCT provided a significantly lower 5 s power output (PO) during the sprint test with a low gear ratio compared with the POSRM (-36.9%). The POSTG was significantly lower than the POSRM within the heavy exercise intensity zone (zone 2, -5.1%) and the low part of the severe intensity zone (zone 3, -4.9%). The POVCT was significantly lower than the POSRM only within zone 2 (-4.5%). The POSTG was significantly lower in standing position than in the seated position (-4.4%). The reproducibility of the PWT, STG and VCT was similar to that of the SRM system. The POSTG and POVCT were significantly decreased from a vibration frequency of 48 Hz and 52 Hz, respectively. Conclusions: The PWT, STG and the VCT systems appear to be reproducible, but the validity, sensitivity and robustness of the STG and VCT systems should be treated with some caution according to the conditions of measurement.
Projet Nano
C.ESCRIBA, J.Y.FOURNIOLS, S.CHARLOT
S4M, TEAM
Rapport de Contrat : IRT St Exupéry - Projet Nano LIV-M-005-D11-167-V0.1, Juillet 2017, 15p. , N° 17145
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140108Influence of power output on pedalling biomechanical parameters in cyclists of different competitive levels
A.BOUILLOD, E.BRUNET, G.SOTO ROMERO, F.GRAPPE
S4M, FFC, C3S
Affiche/Poster : Science and Cycling ( ) 2017 du 28 juin au 29 juin 2017, Dusseldorf (Allemagne), Juin 2017, 2p. , N° 17148
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140114Accuracy and reproducibility of the new CycleOps Hammer Direct drive Trainer
M.FREMEAUX, A.BOUILLOD, E.BRUNET, G.SOTO ROMERO, F.GRAPPE
S4M, FFC, C3S
Manifestation avec acte : Science and Cycling ( ) 2017 du 28 juin au 29 juin 2017, Dusseldorf (Allemagne), Juin 2017, 2p. , N° 17147
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