LASER DOPPLER VELOCIMETRY FLOW MEASUREMENT
    4.
    发明公开

    公开(公告)号:US20240011808A1

    公开(公告)日:2024-01-11

    申请号:US18349399

    申请日:2023-07-10

    Applicant: Kardion GmbH

    CPC classification number: G01F1/663 A61M60/13 A61M60/216 A61M60/408 G01F1/661

    Abstract: Systems, devices and method for laser Doppler-based fluid flow analysis. A Laser Doppler Velocimetry (LDV) technique may be used to analyze fluid flows in various contexts, such as blood flow in mechanical circulatory support (MCS) systems, and in other applications. Fluid velocity and volumetric flow may be measured. A laser source, optical fiber, and/or a photodiode may be used. Some embodiments may assess particulate parameters such as hemoglobin concentration in blood, reduce spectral noise via flow disturbance, reduce spectral noise using light of particular wavelength ranges, reduce noise via data analysis and signal processing techniques, and/or determine flow rate based on a non-linear relationship between a first weighted moment and the fluid flow.

    MEASURING THE FLOW RATE OF FLUIDS WITH DIELECTRIC CONTRAST ANALYSIS

    公开(公告)号:US20230366712A1

    公开(公告)日:2023-11-16

    申请号:US18354915

    申请日:2023-07-19

    CPC classification number: G01F1/74 G01F1/661 G01F1/88 G01N33/2823

    Abstract: Systems comprising electromagnetic radiation source; dielectric contrast analysis structure comprising: bulk dielectric substance and a plurality of receptacles in the bulk dielectric substance, wherein the plurality of receptacles allow a material to flow through the receptacles from a first side of the bulk dielectric substance to a second side of the dielectric substance; first flow line connected to the first side of the bulk dielectric substance; second flow line connected to the second side of the bulk dielectric substance; flow path for the material comprising the first flow line, the plurality of receptacles, and the second flow line. A flow path for a material to flow through the receptacles; a first pressure sensor with the first flow line; a second pressure sensor with the second flow line; and an electromagnetic radiation detector, wherein the dielectric contrast analysis structure is between the electromagnetic radiation source and the electromagnetic radiation detector.

    SYSTEM AND METHOD FOR FOCUSING COLOR SCHLIEREN DIAGNOSTICS

    公开(公告)号:US20230324297A1

    公开(公告)日:2023-10-12

    申请号:US18206972

    申请日:2023-06-07

    Applicant: Ingmar Schoegl

    Inventor: Ingmar Schoegl

    CPC classification number: G01N21/455 H04N17/02 G01F1/661

    Abstract: Embodiments of the present application are directed toward a focusing Schlieren technique that is capable of adding color-coded directional information to the visualization of density gradients. Other advantages of the technique can include that it does not require manual calibration, has a simple design and is sensitive enough to be used in compact experimental setups. Certain embodiments include the use of a color-coded source image that replaces the conventional source grid. The technique may benefit from a computer-controlled digital background, which is used for both illumination and display of color-coded source images.

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