US 12,113,515 B2
Acoustic wave sensor and interrogation of the same
Sylvain Ballandras, Besançon (FR); Thierry LaRoche, Besançon (FR); and Julien Garcia, Besançon (FR)
Assigned to Soitec, Bernin (FR)
Appl. No. 17/599,149
Filed by Soitec, Bernin (FR)
PCT Filed Mar. 19, 2020, PCT No. PCT/EP2020/057666
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/200822, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 1903330 (FR), filed on Mar. 29, 2019.
Prior Publication US 2022/0173721 A1, Jun. 2, 2022
Int. Cl. H03H 9/64 (2006.01); G01K 11/26 (2006.01); G01S 13/75 (2006.01); G06K 7/00 (2006.01); G06K 19/067 (2006.01)
CPC H03H 9/642 (2013.01) [G01K 11/265 (2013.01); G01S 13/755 (2013.01); G06K 7/00 (2013.01); G06K 19/0675 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of interrogating an acoustic wave sensor, comprising:
transmitting, by an interrogator, an interrogation radiofrequency signal to the acoustic wave sensor by way of a transmission antenna;
receiving, by the interrogator, a response radiofrequency signal from the acoustic wave sensor by way of a reception antenna; and
processing by a processing means of the interrogator the received response radiofrequency signal to obtain in-phase and quadrature components both in a time domain and a frequency domain;
detecting by the processing means perturbations of the obtained in-phase and quadrature components both in the time domain and the frequency domain;
determining by the processing means a value of a measurand based on the detected perturbations; and
wherein the value of the measurand is determined in the time domain if the perturbations in the frequency domain exceed a first predetermined threshold, and the value of the measurand is determined in the frequency domain if the perturbations in the time domain exceed a second predetermined threshold.