-
公开(公告)号：US11712717B2
公开(公告)日：2023-08-01
申请号：US16367075
申请日：2019-03-27
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Stewart Sherrit , Xiaoqi Bao , Yoseph Bar-Cohen , Mircea Badescu , Hyeong Jae Lee
CPC classification number: B06B1/0614 , A61B17/22012 , B25D16/00 , G01V1/006 , A61B2017/22025 , A61B2017/22027 , B06B2201/73 , B25D2250/311
Abstract: A dual frequency ultrasonic and sonic actuator with constrained impact mass is presented. According to one aspect, displacement of the impact mass is constrained by cavity to which ultrasonic stress from the tip of a horn is applied. According to another aspect, the displacement of the impact mass is constrained by a spring attached to the tip of the horn. According to another aspect, the displacement of the impact mass is constrained by a flexure. The constrained impact mass converts the ultrasonic stress to lower frequency sonic stress that is coupled to a transmitting element for transmission through a surface. According to one aspect, the transmitting element is a longitudinal probe. According to another aspect, the transmitting element is a drill bit used to penetrate though the surface. According to another aspect, the transmitting element is a thumper used to transmit elastic waves though the surface.
-
公开(公告)号：US10508513B2
公开(公告)日：2019-12-17
申请号：US15486221
申请日：2017-04-12
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Mircea Badescu , Stewart Sherrit , Xiaoqi Bao , Yoseph Bar-Cohen , Jeffery L. Hall
Abstract: A valve that allows control of each of one or more flow paths using one actuator is presented. Rotary motion of a motor is transformed into linear motion using a roller screw mechanism. The travel of the roller screw nut is predefined between front and back hard stops that prevent the roller screw from rotating when the stops are reached. A poppet is attached to the nut using a flexible connection. The nut drives a sleeve with inclined surfaces that moves relative to a locking flexure. When the sleeve is driven, it deforms flanges of the locking flexure causing a cantilever end finger of the flexure to move radially and prevent the poppet from being pushed back. If the sleeve is moved farther, a groove on the sleeve engages notches on the fingers creating a detent that prevents the spring to push the sleeve back.
-
公开(公告)号：US09605771B2
公开(公告)日：2017-03-28
申请号：US14308374
申请日：2014-06-18
Applicant: California Institute of Technology
Inventor： Stewart Sherrit , Mircea Badescu , Xiaoqi Bao , Yoseph Bar-Cohen
IPC: F16K47/08 , F15D1/02 , F16L55/027
CPC classification number: F16K47/08 , F15D1/025 , F16L55/02718 , F16L55/02727 , F16L55/02736 , F16L55/02781 , F16L55/0279 , Y10T137/206
Abstract: Apparatus, systems and methods for implementing flow cages and flow cage assemblies in association with high pressure fluid flows and fluid valves are provided. Flow cages and flow assemblies are provided to dissipate the energy of a fluid flow, such as by reducing fluid flow pressure and/or fluid flow velocity. In some embodiments the dissipation of the fluid flow energy is adapted to reduce erosion, such as from high-pressure jet flows, to reduce cavitation, such as by controllably increasing the flow area, and/or to reduce valve noise associated with pressure surge.
-
公开(公告)号：US20160146680A1
公开(公告)日：2016-05-26
申请号：US14948184
申请日：2015-11-20
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Xiaoqi Bao , Stewart Sherrit
CPC classification number: E21B47/06 , G01L9/0022 , G01L9/008
Abstract: A pressure sensor including an enclosure and a bending resonator housed in the enclosure. The bending resonator includes a diaphragm connected to the enclosure, a piezoelectric layer on the diaphragm, and an electrode on the piezoelectric layer. The pressure sensor also includes an electrical terminal coupled to the piezoelectric layer and extending out through the enclosure. The electrical terminal applies an input signal to the piezoelectric layer to resonate the bending resonator. A resonance frequency of the bending resonator changes according to a change in an external pressure applied to the pressure sensor and the resonance frequency of the bending resonator corresponds to the external pressure applied to the pressure sensor.
Abstract translation: 压力传感器包括外壳和容纳在外壳中的弯曲谐振器。 弯曲谐振器包括连接到外壳的隔膜，隔膜上的压电层和压电层上的电极。 压力传感器还包括耦合到压电层并延伸穿过外壳的电端子。 电端子将输入信号施加到压电层以使弯曲谐振器谐振。 弯曲谐振器的谐振频率根据施加到压力传感器的外部压力的变化而变化，并且弯曲谐振器的谐振频率对应于施加到压力传感器的外部压力。
-
公开(公告)号：US12140826B2
公开(公告)日：2024-11-12
申请号：US17397767
申请日：2021-08-09
Applicant: California Institute of Technology
Inventor： Yen-Hung Wu , Stewart Sherrit , Valerie Scott Kristof , Mina Rais-Zadeh , Mustafa B. Coskun
Abstract: Disclosed herein is a tunable diffraction grating using surface acoustic waves. In some embodiments, the tunable diffraction grating includes a piezoelectric substrate including an interdigital transducer (IDT) region and a delay line region; a plurality of IDT electrodes positioned in the IDT region, wherein the IDT electrodes are each individually addressable such that the voltage applied to each of the electrodes is phase shifted, and wherein the IDT electrodes provide the phase shifted voltage to induce surface acoustic waves in the piezoelectric substrate in a pattern which produce a grating in the delay line region. Advantageously, tunable diffraction gratings have many applications including spectrometers for orbiters and rovers to Mars.
-
Patent Agency Ranking
6.发明申请TEMPERATURE SENSOR USING PIEZOELECTRIC RESONATOR AND METHODS OF MEASURING TEMPERATURE 审中-公开使用压电谐振器的温度传感器和测量温度的方法公开(公告)号：US20160252406A1
公开(公告)日：2016-09-01
申请号：US15054073
申请日：2016-02-25
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Stewart Sherrit , Xiaoqi Bao
Abstract: A method of measuring temperature includes positioning a piezoelectric resonator in an environment exhibiting the temperature to be measured, applying an input signal to the piezoelectric resonator to resonate the piezoelectric resonator, varying a frequency of the input signal over a range of input frequencies, determining the resonance frequency of the piezoelectric resonator, and determining the temperature of the environment by referencing the resonance frequency of the piezoelectric resonator. The resonance frequency of the piezoelectric resonator changes according to a change in the temperature of the environment and the resonance frequency of the piezoelectric resonator corresponds to the temperature of the environment.
Abstract translation: 测量温度的方法包括将压电谐振器定位在呈现待测温度的环境中，向压电谐振器施加输入信号以使压电谐振器谐振，从而在输入频率范围内改变输入信号的频率，确定 压电谐振器的谐振频率，并且通过参考压电谐振器的谐振频率来确定环境的温度。 压电谐振器的谐振频率根据环境温度的变化而变化，并且压电谐振器的谐振频率对应于环境温度。
-
7.发明授权Communication in pipes using acoustic modems that provide minimal obstruction to fluid flow 有权在使用声学调制解调器的管道中进行通信，这些调制解调器对流体流动提供最小的阻塞公开(公告)号：US09418647B2
公开(公告)日：2016-08-16
申请号：US13913044
申请日：2013-06-07
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Yoseph Bar-Cohen , Eric D. Archer , Xiaoqi Bao , Stewart Sherrit
CPC classification number: G10K11/18 , A61B8/4483 , A61B8/4488 , E21B47/14 , E21B47/18 , G10K11/34
Abstract: A plurality of phased array acoustic communication devices are used to communicate data along a tubulation, such as a well. The phased array acoustic communication devices employ phased arrays of acoustic transducers, such as piezoelectric transducers, to direct acoustic energy in desired directions along the tubulation. The system is controlled by a computer-based controller. Information, including data and commands, is communicated using digital signaling.
Abstract translation: 多个相控阵声学通信装置用于沿着诸如井的管道传送数据。 相控阵声学通信装置使用诸如压电换能器之类的声换能器的相控阵列，以沿着管道将理想的方向引导声能。 该系统由基于计算机的控制器控制。 使用数字信号传送包括数据和命令的信息。
-
公开(公告)号：US11316447B2
公开(公告)日：2022-04-26
申请号：US16087517
申请日：2017-03-24
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Stewart Sherrit , Hyeong Jae Lee , Tim Colonius , Luis Phillipe Tosi
IPC: H01L41/113 , H02N2/18 , E21B41/00
Abstract: A flow energy harvesting system including a nozzle-diffuser defining a spline-shaped flow channel and a flow energy harvesting device in the spline-shaped flow channel of the nozzle-diffuser. The spline-shaped flow channel includes a converging portion, a diverging portion, and a constriction section between the converging and diverging portions. The flow energy harvesting device includes a flextensional member having a frame and a cantilever extending outward from the frame, and a stack of piezoelectric elements housed in an interior cavity defined in the frame. The cantilever is a non-piezoelectric material. The frame of the flextensional member is in the converging portion and the cantilever is in the constriction section of the spline-shaped flow channel. The frame is configured to deform and elongate the piezoelectric elements to generate a current based on the piezoelectric effect when a fluid flows through the spline-shaped flow channel and generates unbalanced forces on the cantilever due.
-
公开(公告)号：US10349972B2
公开(公告)日：2019-07-16
申请号：US15218979
申请日：2016-07-25
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY , PLACIDUS LLC
Inventor： Yoseph Bar-Cohen , Stewart Sherrit , Hyeong Jae Lee , Mircea Badescu , Xiaoqi Bao , Yoseph Shalev , Joshua Leavitt
IPC: A61B17/22 , A61D1/02 , A61B17/3207 , A61B17/32 , A61B17/00
Abstract: An arterial blockage percussive drill having a guiding sleeve, a drilling wire slidably coupled to the guiding sleeve and a percussive actuator coupled to the drilling wire to longitudinally oscillate the drilling wire into an arterial blockage.
-
公开(公告)号：US20190097548A1
公开(公告)日：2019-03-28
申请号：US16087517
申请日：2017-03-24
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Stewart Sherrit , Hyeong Jae Lee , Tim Colonius , Luis Phillipe Tosi
Abstract: A flow energy harvesting system including a nozzle-diffuser defining a spline-shaped flow channel and a flow energy harvesting device in the spline-shaped flow channel of the nozzle-diffuser. The spline-shaped flow channel includes a converging portion, a diverging portion, and a constriction section between the converging and diverging portions. The flow energy harvesting device includes a flextensional member having a frame and a cantilever extending outward from the frame, and a stack of piezoelectric elements housed in an interior cavity defined in the frame. The cantilever is a non-piezoelectric material. The frame of the flextensional member is in the converging portion and the cantilever is in the constriction section of the spline-shaped flow channel. The frame is configured to deform and elongate the piezoelectric elements to generate a current based on the piezoelectric effect when a fluid flows through the spline-shaped flow channel and generates unbalanced forces on the cantilever due.
-
-
-
-
-
-
-
-
-
Search Results
18
records
(took 0.033 seconds)
