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公开(公告)号:WO2021150519A1
公开(公告)日:2021-07-29
申请号:PCT/US2021/013997
申请日:2021-01-19
Inventor: MA, Bo , FIROUZI, Kamyar , KHURI-YAKUB, Butrus T. , JOSEPH, Jose
IPC: A61B8/00 , A61N7/02 , G01N29/24 , B06B1/06 , B06B1/0215 , B06B1/0292 , B06B1/0651 , B06B1/0662 , B06B2201/55 , B81B2201/0271 , B81B2203/04 , B81B3/0021 , B81C1/00166 , B81C2201/0157 , B81C2201/0178 , G01N29/0654 , G01N29/22 , G01N29/2406
Abstract: Aspects of this disclosure relate to a capacitive micromachined ultrasonic transducer (CMUT) with a contoured electrode and/or driving a CMUT with a pulse train of unipolar pulses. In certain embodiments, the CMUT has a contoured electrode. The electrode may be non-planar to correspond to a deflected shape of the outer plate. A change in distance between the electrode and the plate after deflection may be greater than a minimum threshold across the width of the CMUT. In some embodiments, a CMUT is excited with a pulse train of unipolar pulses.
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公开(公告)号:WO2022208042A1
公开(公告)日:2022-10-06
申请号:PCT/GB2022/050255
申请日:2022-01-31
Inventor: LESSO, John Paul , STEVEN, Robert A
IPC: B06B1/02 , B06B1/06 , H04R17/00 , B06B1/0207 , B06B1/0261 , B06B2201/55 , G10K9/122
Abstract: Circuitry for estimating a displacement of a piezoelectric transducer in response to a drive signal applied to the piezoelectric transducer, the circuitry comprising: monitoring circuitry configured to be coupled to the piezoelectric transducer and to output a sense signal indicative of an electrical signal associated with the piezoelectric transducer as a result of the drive signal; wherein the circuitry is configured to generate a difference signal based on the drive signal and the sense signal; and wherein the circuitry further comprises processing circuitry configured to apply at least one transfer function to the difference signal to generate a signal indicative of the displacement of the piezoelectric transducer.
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公开(公告)号:WO2022028970A1
公开(公告)日:2022-02-10
申请号:PCT/EP2021/071089
申请日:2021-07-28
Applicant: VALEO SCHALTER UND SENSOREN GMBH
Inventor: MAURER, Philipp , HAFNER, Bastian , FRINTZ, Thomas
IPC: G01S7/52 , G01S7/529 , G01S15/10 , G01S15/931 , B06B1/02 , B06B1/0253 , B06B2201/55 , B06B2201/70 , G01S7/52006
Abstract: Die Erfindung betrifft einen Ultraschallwandler (10) mit einem Piezo-Element (12), insbesondere zur Verwendung an einem Fahrzeug, mit einer Ansteuer- und Auswerteschaltung (14) zur Erzeugung einer Ansteuerspannung (Us) für das Piezo-Element (12), welches in Abhängigkeit von der Ansteuerspannung (Us) ein Ultraschallsignal erzeugt und abstrahlt, und zum Ausgeben eines Ausgangssignals (Uout) basierend auf einem an dem Piezo-Element (12) empfangenen Echosignal, und einer Gyratorschaltung (26) zur Bereitstellung einer Kompensationsinduktivität zur Anpassung der Ansteuer- und Auswerteschaltung (14), insbesondere zur Kompensation einer parasitären Anschlusskapazität des Piezo-Elements (12), wobei die Gyratorschaltung (26) mit einer veränderlichen Kompensationsinduktivität ausgeführt ist. Die Erfindung betrifft außerdem ein Verfahren zur Kompensation eines Ultraschallwandlers (10) mit einem Piezo-Element (12) zur Anpassung einer Empfangsempfindlichkeit, insbesondere zur Verwendung an einem Fahrzeug (10), insbesondere eines obigen Ultraschallwandlers, umfassend die Schritte Erfassen einer Messgröße zur Anpassung der Empfangsempfindlichkeit, und Kompensieren des Ultraschallwandlers (10) durch Verändern der Kompensationsinduktivität der Gyratorschaltung (26) basierend auf der erfassten Messgröße.
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公开(公告)号:WO2021227261A1
公开(公告)日:2021-11-18
申请号:PCT/CN2020/105732
申请日:2020-07-30
Applicant: 苏州希声科技有限公司
Inventor: 简小华
IPC: A61B8/00 , A61B8/4281 , B06B1/0648 , B06B2201/55 , B06B2201/76 , G01B11/18 , G01N29/04 , G01N29/2437 , G01N29/34 , G01S15/08
Abstract: 一种柔性超声探头(100)、超声成像检测系统及检测方法,探头(100)包括柔性换能器阵列(2)及两端分别与外界连通的外壳(1),外壳(1)内具有一端开口的填充腔(4),填充腔(4)的开口朝向外壳(1)的一端,柔性换能器阵列(2)连接在外壳(1)的一端且柔性换能器阵列(2)还与填充腔(4)的开口端密封设置,使得填充腔(4)形成用于填充流体填充剂的密封腔室,探头(100)还包括设置在外壳(1)内的用于检测柔性换能器阵列(2)的不同点的位置的形变探测装置(5)。这一柔性超声探头(100)通过设置填充腔(4),并在填充腔(4)内填充流体填充剂,能够使得柔性换能器阵列(2)实现不同曲率被检测目标检测成像,并通过内置形变探测装置(5),可实现对各阵元曲率的实时检测和反馈,提高成像检测的灵活性和自动化。
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公开(公告)号:WO2021121542A1
公开(公告)日:2021-06-24
申请号:PCT/EP2019/085370
申请日:2019-12-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD. , EVREINOV, Grigori
Inventor: COE, Patrick , FAROOQ, Ahmed , RAISAMO, Roope
IPC: H02N2/18 , B06B1/02 , B06B1/04 , B06B1/045 , B06B2201/53 , B06B2201/54 , B06B2201/55 , H02N2/186
Abstract: A multifunctional haptic actuator (1) having a plurality of functional actuation modes, comprising an actuation arrangement (2) and at least one moveable energy storage (3). The actuation arrangement (2) provides and/or facilitates movement of the energy storage (3) along and/or around a plurality of actuation axes. The energy storage (3) is adapted for supplying electric charge to drive the actuation arrangement (2), and storing electric charge generated by the actuation arrangement (2). A first functional actuation mode comprises generating mechanical vibrations by supplying electric charge from the energy storage (3) to the actuation arrangement (2), the electric charge generating movement of the energy storage (3). A second functional actuation mode comprises generating electric charge by means of mechanical vibrations of the energy storage (3), the vibrations generating electric charge in the actuation arrangement (2), the electric charge being stored in the energy storage (3). This solution provides an actuator the components of which can be used in several different actuation modes such as for providing haptic feedback and harvesting energy, hence reducing the need for separate components for each mode.
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