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公开(公告)号：US20220170799A1
公开(公告)日：2022-06-02
申请号：US17441109
申请日：2020-03-19
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Julien Garcia
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.
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公开(公告)号：US20220341881A1
公开(公告)日：2022-10-27
申请号：US17753508
申请日：2020-09-04
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia
Abstract: An acoustic wave sensor device, comprising an interdigitated transducer; a first reflection structure arranged on one side of the interdigitated transducer, and a second reflection structure arranged on another side of the interdigitated transducer; a first resonance cavity comprising a first upper surface and formed between the interdigitated transducer and the first reflection structure; a second resonance cavity comprising a second upper surface and formed between the interdigitated transducer and the second reflection structure; and wherein the second upper surface comprises a physical and/or chemical modification as compared to the first upper surface.
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Patent Agency Ranking
公开(公告)号：US20230361751A1
公开(公告)日：2023-11-09
申请号：US18042948
申请日：2021-03-03
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche , Julien Garcia , Emilie Courjon , Florent Bernard
CPC classification number: H03H9/02551 , H03H9/25 , H03H9/02574
Abstract: An acoustic wave sensor device comprises a quartz material layer comprising a planar surface, a first interdigitated transducer formed over the planar surface of the quartz material layer, a first reflection structure formed over the planar surface of the quartz material layer, a second reflection structure formed over the planar surface of the quartz material layer, a first resonance cavity formed between the first interdigitated transducer and the first reflection structure and a second resonance cavity formed between the first interdigitated transducer and the second reflection structure. The planar surface of the quartz material layer is defined by a crystal cut of a quartz material of the quartz material layer with angles φ in the range of −14° to −24°, θ in the range of −25° to −45° and ψ in the range of +8° to +28°.
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公开(公告)号：US20230308074A1
公开(公告)日：2023-09-28
申请号：US18247629
申请日：2021-09-29
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia , Alexandre Clairet
IPC: H03H9/02
CPC classification number: H03H9/02574 , H03H9/02559 , H03H9/0259 , H03H9/14538
Abstract: A surface acoustic wave (SAW) device comprises an interdigitated transducer structure and at least one acoustic wave reflective structure provided on or in an acoustic wave propagating substrate. The interdigitated transducer structure comprises a first material and the at least one acoustic wave reflective structure comprises a second material different from the first material and/or the acoustic wave reflective structure and the interdigitated transducer structure have different geometrical parameters. A sensor comprises a SAW device as described herein, and a method is used for manufacturing a SAW device comprising at least one acoustic wave reflective structure.
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公开(公告)号：US20220326102A1
公开(公告)日：2022-10-13
申请号：US17753510
申请日：2020-09-04
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia
Abstract: An acoustic wave pressure sensor device configured to measure a pressure, comprising a substrate configured to bend when pressure is applied to the substrate such that an area of a first kind of strain and an area of a second kind of strain are formed in the substrate; an interdigitated transducer formed over the substrate; a first Bragg mirror formed over the substrate and arranged on one side of the interdigitated transducer; a second Bragg mirror formed over the substrate and arranged on another side of the interdigitated transducer; a first resonance cavity formed between the interdigitated transducer and the first Bragg mirror; a second resonance cavity formed between the interdigitated transducer and the second Bragg mirror; and wherein the first resonance cavity is formed over the area of the first kind of strain and the second resonance cavity is formed over the area of the second kind of strain.
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公开(公告)号：US11828668B2
公开(公告)日：2023-11-28
申请号：US17753510
申请日：2020-09-04
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia
CPC classification number: G01L9/0025 , G01L1/165 , G01L9/008
Abstract: An acoustic wave pressure sensor device configured to measure a pressure, comprising a substrate configured to bend when pressure is applied to the substrate such that an area of a first kind of strain and an area of a second kind of strain are formed in the substrate; an interdigitated transducer formed over the substrate; a first Bragg mirror formed over the substrate and arranged on one side of the interdigitated transducer; a second Bragg mirror formed over the substrate and arranged on another side of the interdigitated transducer; a first resonance cavity formed between the interdigitated transducer and the first Bragg mirror; a second resonance cavity formed between the interdigitated transducer and the second Bragg mirror; and wherein the first resonance cavity is formed over the area of the first kind of strain and the second resonance cavity is formed over the area of the second kind of strain.
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公开(公告)号：US20220173721A1
公开(公告)日：2022-06-02
申请号：US17599149
申请日：2020-03-19
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche , Julien Garcia
IPC: H03H9/64 , G01K11/26 , G06K19/067 , G01S13/75
Abstract: A method of interrogating an acoustic wave sensor comprises 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 the time domain and the frequency domain, determining by the processing means perturbations of the obtained in-phase and quadrature components both in the time domain and the frequency domain and determining by the processing means a value of a measurand based on the detected perturbations.
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