US 2022/0170799 A1Published application

Interrogation of acoustic wave sensors

OwnerSylvain Ballandras, Julien Garciainventors

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Abstract

An interrogation device for interrogating an acoustic wave sensor device comprises a transmission antenna; a reception antenna; and a processor configured for determining in-phase components I and quadrature components Q of a response signal received from the sensor in N consecutive frames of the response signal; determining moduli |Y| of the in-phase components I and quadrature components Q; determining a first norm M based on the moduli |Y|; determining a first weighting function W based on the first norm M and the moduli |Y|; determining in-phase components I and quadrature components Q of an N+1th frame of the response signal; determining moduli |Y| of in-phase components I and quadrature components Q of the N+1th frame; and applying the first weighting function W to the determined moduli |Y| of the response signal in the N+1th frame to obtain weighted moduli |Y|w of the response signal for the N+1th frame.

Claims20

Dependent claims

An interrogation device for interrogating an acoustic wave sensor, comprising:

a transmission antenna configured for transmitting an interrogation radiofrequency signal to the acoustic wave sensor device;
a reception antenna configured for receiving a response radiofrequency signal from the acoustic wave sensor device;
and
a processing means configured for:
determining in-phase components I and quadrature components Q of the received response radiofrequency signal in each of N consecutive frames of the response radiofrequency signal, N being an integer larger than 1, wherein each of the N frames comprises X sampling points;
determining the moduli |Y| of each of the pairs of the determined in-phase components I and the quadrature components Q;
determining a first norm M based on the determined moduli |Y|;
determining a first weighting function W based on the determined first norm M and the determined moduli |Y|;
determining the in-phase components I and the quadrature components Q of an N+1th frame of the received response radiofrequency signal, the N+1th frame comprising X sampling points of the received response radiofrequency signal;
determining the moduli |Y| of each of the pairs of the determined in-phase components I and the quadrature components Q of the N+1th frame;
and
applying the first weighting function W to the determined moduli |Y| of the received response radiofrequency signal in the N+1th frame to obtain weighted moduli |Y|w of the received response radiofrequency signal for the N+1th frame.

9 more elements

An interrogation device for interrogating an acoustic wave sensor, comprising:

a transmission antenna configured for transmitting an interrogation radiofrequency signal to the acoustic wave sensor device;
a reception antenna configured for receiving a response radiofrequency signal from the acoustic wave sensor device;
and
a processing means configured for:
determining in-phase components I and quadrature components Q of the received response radiofrequency signal in each of N consecutive frames of the response radiofrequency signal, N being an integer larger than 1, wherein each of the N frames comprises X sampling points;
determining a first I norm MI based on the determined in-phase components I;
determining a first Q norm MQ based on the determined quadrature components Q;
determining a first I weighting function WI based on the determined first I norm MI and the determined in-phase components I;
determining a first Q weighting function WQ based on the determined first Q norm MQ and the determined quadrature components Q;
determining the in-phase components I and the quadrature components Q of an N+1th frame of the received response radiofrequency signal, the N+1th frame comprising X sampling points of the received response radiofrequency signal;
applying the first I weighting function WI to the determined in-phase components I of the received response radiofrequency signal in the N+1th frame to obtain weighted in-phase components Iw of the received response radiofrequency signal for the N+1th frame;
and
applying the first Q weighting function WQ to the determined quadrature components Q of the received response radiofrequency signal in the N+1th frame to obtain weighted quadrature components Qw of the received response radiofrequency signal for the N+1th frame.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/441,109Filed 19 Mar 2020
Priority: FR 190333129 Mar 2019
Published: 2 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G01K 11/265
Of resonant frequencies: using surface acoustic wave [SAW]
H03H 9/642
SAW matched filters, e.g. surface acoustic wave compressors, chirped or coded surface acoustic wave filters: sAW transducers details for remote…
G01L 1/165
Using piezoelectric resonators: with acoustic surface waves
G01S 7/03
Of systems according to group G01S13/00: details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver