METAMATERIAL-BASED ACOUSTIC SENSOR BEAMFORMING

    公开(公告)号:US20230056534A1

    公开(公告)日:2023-02-23

    申请号:US17743878

    申请日:2022-05-13

    摘要: An acoustic lens to steer an acoustic beam includes a first structure, a second structure spaced from the first structure, an array of projections disposed between the first and second structures, each projection of the array of projections extending from the first structure toward the second structure to define a respective gap between the projection and the second structure, and an actuator configured to move the first structure, the second structure, or the array of projections for collective adjustment of the respective gaps of the array of projections. Each projection is configured to define one or more respective unit cells, each unit cell having a sub-wavelength size relative to the acoustic beam to establish an effective refractive index profile for the acoustic beam between the first and second structures. The actuator is configured such that the collective adjustment of the respective gaps varies across the array of projections to spatially modify the effective refractive index profile to steer the acoustic beam.

    AUGMENTED VEHICLE TESTING ENVIRONMENT

    公开(公告)号:US20230053687A1

    公开(公告)日:2023-02-23

    申请号:US17889563

    申请日:2022-08-17

    IPC分类号: G06T11/00

    摘要: An augmented virtual vehicle testing system and method for presenting graphics to a vehicle operator during operation of a vehicle. The method includes: determining a position of a vehicle operator within a vehicle testing environment; executing an augmentative simulation of the vehicle testing environment, wherein the augmentative simulation is used to provide a position of one or more virtual objects within the vehicle testing environment; generating graphics representing the one or more virtual objects based on the position of the vehicle operator and the position of the one or more virtual objects within the vehicle testing environment; and presenting the graphics on an electronic display and to the vehicle operator during operation of the vehicle.

    DEVICE FOR RAPID AND QUANTITATIVE DETECTION OF DRUGS OF ABUSE IN SWEAT

    公开(公告)号:US20230051263A1

    公开(公告)日:2023-02-16

    申请号:US17791790

    申请日:2021-01-11

    IPC分类号: G01N33/94 B01L3/00

    摘要: An automated microfluidic bioreactor device and methods to rapidly detect drugs of abuse from human sweat are provided. The bioreactor can perform either single-plexed measurements (detecting only one target analyte at a time) or multiplexed measurement (detecting multiple analytes simultaneously). The bioreactor device has a cartridge comprising a capillary array that employs competitive enzyme-linked immunosorbent assay (ELISA) to detect the presence of various drugs or metabolite compounds. For example, four common drugs, methadone, methamphetamine, amphetamine, and tetrahydrocannabinol, were detected rapidly and quantitatively in about 16 minutes with a low sweat sample volume (about 4 μL per analyte) and a large dynamic range (methadone: 0.0016 ng/mL-1 ng/mL; METH: 0.016 ng/mL-25 ng/mL; amphetamine: 0.005 ng/mL-10 ng/mL; THC: 0.02 ng/mL-1000 ng/mL).