Simulations EM à la HEIG-VD

Transcription

1 1

2 Simulations EM à la HEIG-VD Présentation for ANSYS Users Meeting EPFL, 11. septembre

3 Processus d innovation organisations de soutien FNS / et autres CTI / et autres Promotion économique milieux de la recherche EPF Universités HES Institutions innovations recherche fondamentale recherche appliquée prestations de service développement industrialisation clients PME grandes entreprises marchés 3

4 Recherche appliquée et développement Nombre de projets 4

5 HEIG-VD Volume financier Millions CHF

6 Les Instituts Les 12 instituts de Ra&D de la HEIG-VD sont de véritables moteurs d innovation Plus de 200 contrats annuels avec le tissus économique 300 ingénieur-e-s et économistes impliqué-e-s dans les activités de Ra&D 9 start-up dont 3 nouvelles en

7 Institute of Information and Communication Technologies (IICT) 79 collaborateurs 54 projets Axes de recherche : Sécurité de l'information Internet mobile et ubiquitaire Communication électronique et collaboration Cloud computing Technologie sans fil Informatique et applications biomédicales 7

8 Group We Use «Waves»! RF communication devices Range from 1cm to 40000km (mostly 10s of m) LF, RFID, M2M, BT, , Satellite, Internet Of Things RF sensing cardiac radar, vital signs detection: MoViS (foundation) Space debris radar: CleanSpace (ESA/SSC) Goniometry (private mandate) Acoustic sensing In-door positioning (ultrasound time of flight) (HES funding) Acoustic communication Ultrasponder (EU FP7) Group 8

9 Group «Waves» for medical treatment Ultrasound medical treatment Non-invasive treatment of prostate cancer 16 channel 3MHz 300W phasing ultrasound generator Client: EDAP-TMS (Lyon) First patients treated successfully 1.5 years after project start RF/microwave treatment Treatment by heating of tissues Beamforming/other focussing techniques Client and details under NDA Use of ANSYS HFSS + Human Body Model Group 9

10 MoViS Monitoring Vital Signs Non-contact monitoring of vital signs through Doppler Radar Heart rate Breathing rate Movements Sensor placed in Bed mattress (medical care, hospitals) Doctors premises (Wall sensor) Other security applications Applications Neonatal care Monitoring people with epilepsy Sports monitoring On-going work Funded by Gebert-Rüf Foundation Group 10

11 MoViS Monitoring Vital Signs Challenges Not only measuring movements of external torso surface Coupling to internal organs Rejection of movements Signal processing Different signal architectures (quadrature?) Simulations Using Human Body Model How to make to the HBM breathe, or its heart beat? Group 11

12 Sports Ball positioning system Principle: goniometry Several quasi Doppler Antennas Prototyped with software defined radio Open source GNUradio on Ubuntu PC Ettus USRP SDR module Challenges: High-shock electronics in the ball (TRX) Small but efficient antenna in the ball (influence of dielectrics) World-wide 2.4GHz system Data interface Simulations HFSS: Antenna in the ball, ball on the ground Designer: Goniometry antenna circuit, impedance matching, crosstalk Group 12

13 Sports Ball positioning system Goniometry antenna switching circuit simulation with ANSYS Designer Easy import of ANF file from Altium Q: where to place the taps vs PCB line (in terms of λ) Simulation of isolation using PIN diode models Simulation success Group 13

14 Sports Ball positioning system Ball EM simulation using HFSS Group 14

15 Hunting Safety system Module Chasseur Scanner Module Promeneur Tag Warn hunter if (equipped) hiker/mushroom seeker is in dangerous zone ±30 angle of detection at 150m Multipath/reflections: trees and vegetation spread spectrum broadband Size constraints: hunter «scanner» + Hiker «Tag» Energy constraints antenna efficiency 2.4GHz RX (broadband) 2.4GHz SS TX Directional GHz RX (broadband) 4 antennas: 3 easy, one difficult helix antenna on the gun Challenge: small size, low weight dielectric antenna directivity! Omnidirectional Controller UHF TRX Omnidirectional UHF TRX Controller Group 15

16 Hunting Safety system Group 16 Prototype 1: helical/dielectric antenna PVC rod: Length 140mm, dia 45mm Reflector: 60mm dia, 25mm high PVC ε=4.2, not very high Intermediate result to validate principle Heavy, too big Challenges: Influence of gun on antenna Rear-to front ratio, better when near tip of gun

17 Hunting Safety system Group 17 Gun effects on antenna Degrades back to front ratio Side lobes especially on back Slight Rotational asymmetry Challenges: In reality the directivity and back-tofront are better Influence of body, arm, hands Human body model? Postures?

18 Hunting Safety system Prototype 2: Ceramic helix Higher permittivity dielectric T- Ceram E20, ε=20 Rod length 64mm, reflector dia still 60mm Challenges Lower directivity than larger antenna (Chu s criterion!!!) It is really needed to consider hunter s body, which can increase the front-to-back ratio Group 18

19 DEFI10G: Gbit line and circuit design Goal: find a way to streamline the design of gigabit PCBs by nonspecialists in gigafast circuits Related to «Qcrypt» nano-tera project Measure a test board Compare with the SI model Challenges: Import issues from Altium Impossible to simulate the whole board at once (350x260mm) Necessary to slice the model PCB around one line Computational load unexpectedly high! Group 19

20 DEFI10G: Gbit line and circuit design Comparison between simulation results and measurements Related to «Qcrypt» nano-tera project Measure a test board Compare with the SI model Challenges: Import issues from Altium Impossible to simulate the whole board at once (350x260mm) Necessary to slice the model PCB around one line Computational load unexpectedly high! Group 20

21 Questions? Looking forward to work with you on innovative projects! HEIG-VD/IICT 15 rue Galilée (Y-Parc) 1400 Yverdon Group 21