High pressure high flow digital valve with locking poppets and backflow prevention

    公开(公告)号:US10508513B2

    公开(公告)日:2019-12-17

    申请号:US15486221

    申请日:2017-04-12

    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.

    PRESSURE SENSOR USING PIEZOELECTRIC BENDING RESONATORS
    4.
    发明申请
    PRESSURE SENSOR USING PIEZOELECTRIC BENDING RESONATORS 审中-公开
    压电传感器使用压电式弯曲谐振器

    公开(公告)号:US20160146680A1

    公开(公告)日:2016-05-26

    申请号:US14948184

    申请日:2015-11-20

    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。

    Tunable diffraction gratings using surface acoustic waves

    公开(公告)号:US12140826B2

    公开(公告)日:2024-11-12

    申请号:US17397767

    申请日:2021-08-09

    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.

    TEMPERATURE SENSOR USING PIEZOELECTRIC RESONATOR AND METHODS OF MEASURING TEMPERATURE
    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

    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。

    Flow energy harvesting devices and systems

    公开(公告)号:US11316447B2

    公开(公告)日:2022-04-26

    申请号:US16087517

    申请日:2017-03-24

    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.

    FLOW ENERGY HARVESTING DEVICES AND SYSTEMS
    10.
    发明申请

    公开(公告)号:US20190097548A1

    公开(公告)日:2019-03-28

    申请号:US16087517

    申请日:2017-03-24

    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.

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