SENSING AND FEEDBACK FOR THE FORMATION OF COMPLEX THREE-DIMENSIONAL ACOUSTIC FIELDS

    公开(公告)号:US20220355546A1

    公开(公告)日:2022-11-10

    申请号:US17869613

    申请日:2022-07-20

    Abstract: An apparatus includes a precursor dispenser for dispensing a precursor material into a workspace, one or more acoustic sources configured to direct acoustic waves towards the workspace to provide acoustic fields that arrange the precursor material in a three-dimensional shape in the workspace, one or more sensors configured to detect a distribution of the precursor material in the workspace, and an electronic controller in communication with the precursor dispenser, the one or more acoustic sources, and the one or more sensors, the electronic controller being programmed to cause the one or more acoustic sources to adjust the acoustic fields to reduce deviations in the distribution of the precursor material from the three-dimensional shape in the workspace.

    NUCLEAR MAGNETIC RESONANCE (NMR) SYSTEM WITH PERMANENT MAGNET

    公开(公告)号:US20200072925A1

    公开(公告)日:2020-03-05

    申请号:US16120144

    申请日:2018-08-31

    Abstract: A nuclear magnetic resonance (NMR) apparatus includes a pair of permanent magnets spaced apart from each other and defining a sample space, the permanent magnets providing a magnetic field in the sample space, an array of magnetic field sensors arranged relative to the sample space to provide, during operation, information about a homogeneity of the magnetic field, an array of magnetic coils arranged relative to the sample space so that each magnetic coil, during operation, generates a magnetic field that changes the magnetic field in the sample space, and an electronic controller programmed to receive information about the magnetic field from the array of magnetic field sensors and to variably energize the magnetic coils in the array of magnetic coils so that the magnetic fields generated by the array of magnetic coils reduces inhomogeneities of the magnetic field.

    FUSED ULTRASOUND AND MAGNETIC RESONANCE IMAGING APPARATUS

    公开(公告)号:US20200069293A1

    公开(公告)日:2020-03-05

    申请号:US16120137

    申请日:2018-08-31

    Abstract: An apparatus includes a housing, an ultrasound transducer in the housing and positioned to direct ultrasound signals to a volume of a subject and detect reflected ultrasound signals from the volume of the subject, a magnet arranged in the housing and positioned such that a magnetic field of the magnet penetrates the volume of the subject, a radiofrequency (RF) system to perturb a nuclear spin polarization of nuclei in the volume of the subject and detect radio waves emitted from the volume, and an electronic controller programmed to compile an image of at least a first region of the subject based on the detected ultrasound signals and compile a magnetic resonance image of at least a second region of the subject based on the detected radio waves.

    METHOD AND APPARATUS FOR COMBINED ANEMOMETER AND PLASMA ACTUATOR

    公开(公告)号:US20190145443A1

    公开(公告)日:2019-05-16

    申请号:US15809302

    申请日:2017-11-10

    Abstract: A method and a device for measuring a fluid flow characteristic of an ambient fluid and modifying fluid flow of the ambient fluid, the method including: applying a first voltage between a first electrode and a second electrode, the first voltage being sufficient to generate a plasma in the first space; applying a second voltage between the first electrode and a third electrode, the second voltage being sufficient to generate a plasma in the second space; measuring a first current between the first and second electrodes, and a second current between the first and third electrodes; determining a fluid flow characteristic of the ambient fluid; and applying a third voltage between the first and second electrodes, the third voltage being sufficient to generate a plasma in the first space sufficient to modify fluid flow of the ambient fluid in the first direction in the first space.

    NMR apparatus with permanent magnets, magnetic field sensors, and magnetic coils

    公开(公告)号:US10782371B2

    公开(公告)日:2020-09-22

    申请号:US16120144

    申请日:2018-08-31

    Abstract: A nuclear magnetic resonance (NMR) apparatus includes a pair of permanent magnets spaced apart from each other and defining a sample space, the permanent magnets providing a magnetic field in the sample space, an array of magnetic field sensors arranged relative to the sample space to provide, during operation, information about a homogeneity of the magnetic field, an array of magnetic coils arranged relative to the sample space so that each magnetic coil, during operation, generates a magnetic field that changes the magnetic field in the sample space, and an electronic controller programmed to receive information about the magnetic field from the array of magnetic field sensors and to variably energize the magnetic coils in the array of magnetic coils so that the magnetic fields generated by the array of magnetic coils reduces inhomogeneities of the magnetic field.

    DYNAMICALLY RECONFIGURABLE ACOUSTIC DIFFRACTIVE DEVICE

    公开(公告)号:US20200300814A1

    公开(公告)日:2020-09-24

    申请号:US16356286

    申请日:2019-03-18

    Abstract: An apparatus includes an acoustic source for directing an acoustic wave towards a workspace, a variable acoustic diffractive device positioned in a path of the acoustic wave between the acoustic source and the workspace, the variable acoustic diffractive device including an array of elements each having independently variable acoustic properties, and an electronic controller in communication with the acoustic source and the variable acoustic diffractive device, the electronic controller programmed to supply signals to cause the acoustic source to produce the acoustic wave and the variable acoustic diffractive device to diffract the acoustic wave from the acoustic source to provide non-uniform acoustic forces in a medium located in the workspace.

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