Wireless Interrogation of SAW Sensors for Advanced Applications. Sylvain Ballandras

Transcription

1 Wireless Interrogation of SAW Sensors for Advanced Applications Sylvain Ballandras

2 Summary, Motivation overview Presentation of the partners: SENSeOR, FEMTO-ST, frec n sys Reader: 2 approaches developed by SENSeOR Resonator reader accuracy and time stability Delay-line reader large bandwidth acquisition Resonator-based sensors Differential sensors load-sensitive sensors Applications for harsh environment Delay-line based sensors: signal processing techniques for flexible implementation and interrogation Perspectives 2

3 SENSeOR presentation 3

4 FEMTO-ST presentation Mixed research unit UMR 6174 CNRS-UFC-ENSMM-UTBM 4

5 frec n sys presentation Frequency Components and Systems frec n sys offer - RF components Dr. Sylvain BALLANDRAS, President/CEO Dr. Emilie COURJON, Chief Production Officer Dr. Thierry LAROCHE, Chief R&D Officer Julien GARCIA, Computer ressources Dr Florent Bernard, Clean Room Technologies Scientific advisers Dr. William Daniau, Research Engineer CNRS Dr. Roland Salut, Development Engineer CNRS SAW/BAW deisgn and analysis SAW manufacturing Dicing/packaging Services: training, development, IP frec n sys specific added-values - High quality manufacturing - High reactivity and flexibility - High temperature dedicated devices 5

6 Reader for resonators General system architecture developed by SENSeOR and FEMTO-ST Software-oriented solution allowing for the development of various interrogation Strategies in 434-MHz-centered ISM band and around Micro-controller : AduC 7026, ARM7 technology 6

7 Interrogation strategies (i) Scanning process for intermittent sensor interrogation: 117 points for covering the ISM band at 434 MHz yielding a ~130 Hz bandwidth (including processing delay) at best 7

8 Interrogation strategies (ii) Tracking approach for quasi-permanent sensor interrogation: 3, 2 and single point interrogation increases the interrogation bandwidth up to 5 khz Quadratic interpolation of the Lorentzian-like resonator response Pseudo-phase reconstruction for fitting the resonance frequency by a 2-point and ultimately 1-point measurements 8

9 Example of SAW sensors developed by SENSeOR SENSeOR's offer: Temperature sensors Pressure sensors Strain gages, torque sensors Chemical sensors Biological sensors Readers, Antennas, User-Interface soft Compact reader and antenna-equipped sensors for various applications Switchgear dedicated temperature sensors AQP pressure/temperature sensors for 4 and 20 Bar range applications 9

10 SAWHOT project : results overview Photo of LGS SAW resonators built on IEEE-Std (YXlt)/48.5 /26.7 LGS Evidence of high quality replications (optimized yield ~ 90%) Packaging + antennas operating up to 800 C EC Patent application # Wireless interrogation of SAW resonators up to 700 C 10

11 Demonstration of a differential sensor at 650 C Differential sensor: 2 independent resonators in a single package Interrogation of the sensor from the back-side of the oven 11

12 Transforming switches into communicating set-ups Coupled mode SAW resonator filters used as a differential transponder: application to an On/Off micro-device 12

13 Delay-line reader principle and validation Real-time SAW delay-line probing: Pulsed-mode RADAR interrogation principle 40 ns long pulses are generated No additional processing (Fourier transform) needed but recording the echoes of the sensor The system is totally controlled by the FPGA circuit Bandwidth up to 250 khz demonstrated 13

14 Delay-line reader synoptic 14

15 Conclusion and Perspectives Reader availability for resonators and delay-lines: versatile approaches allowing for addressing numerous demands in different standards Resonators built on various substrates (Quartz, LGS, LiTaO3, LiNbO3) using adapted design for a large variety of physical parameter monitoring on various ranges Application currently focused on temperature measurements for energy production using resonators in ISM bands (434, 915 MHz) Further developments engaged for merging high temperature monitoring and sensor identification: frec n sys research program 15

16 Acknowledgments Sylvain Ballandras would like to address his special thanks to: The whole frec n sys team: Emilie Courjon, Thierry Laroche, Julien Garcia, Florent Bernard and our young training collaborators CoSyMA Team Time-Frequency Dept, FEMTO-ST: Gilles Martin, William Daniau, Thomas Baron, Jean-Michel Friedt, etc., and the whole institute CNRS, Université de Franche-Comté, ENSMM, UTBM SENSeOR Team : Gerhard Heider, François Gégot, Luc Chommeloux, etc. Incubateur de Franche-Comté, Région Franche-Comté, Département Doubs, FEDER, DIRECCTE, BGE, MRES, BPI France, all the organization that has supported the development of frec n sys 16

17 Thank you for your attention This work was partly performed within the SAWHOT project ([FP7/ ]) under grant agreement no [NMP4-SL ] and from the Ministry of Education and Science of the Russian Federation under Government Contract no [ ]. The presented developments were partly developed with support of the French Délégation Générale de l'armement (DGA), of the National Space Agency CNES and of the French National Agency for Scientific Research (ANR) Finally, The presented developments were partly developed with support of the European Founds for Regional Economic Development (FEDER) and regional/local support (Région Franche-Comté, Département Doubs the so-called Collectivités Territoriales) 17