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    Non-contact self-injection-locked vital sign sensor
    1.
    发明授权
    Non-contact self-injection-locked vital sign sensor 有权

    公开(公告)号：US11350839B2

    公开(公告)日：2022-06-07

    申请号：US16807338

    申请日：2020-03-03

    Applicant: National Taiwan University of Science and Technology

    Inventor： Chao-Hsiung Tseng ,  Yi-Hua Lin

    IPC: A61B5/05 ,  H03F3/04 ,  H01P5/12 ,  H03L7/089 ,  A61B5/00 ,  A61B5/113 ,  A61B5/08 ,  A61B5/024 ,  A61B5/0507 ,  H03L7/099 ,  H03D7/00 ,  H03C5/00

    Abstract: A non-contact self-injection-locked vital sign sensor is disclosed, which includes transmitting antenna, receiving antenna, self-injection-locked integrated circuit and demodulator. The self-injection-locked integrated circuit includes voltage-controlled oscillator, mixer, two amplifiers and harmonic-frequency power combiner. A frequency-multiplied signal is produced by amplifiers and harmonic-frequency power combiner then transmitted to a living body by transmitting antenna. A frequency-divided signal is produced by voltage-controlled oscillator and mixer then transmitted to voltage-controlled oscillator, then a frequency- and amplitude-modulated signal is produced by the voltage-controlled oscillator then transmitted to demodulator to produce a vital sign. So as to detect vital sign with a higher frequency to increase measurement sensitivity by using a low-cost integrated circuit process. A centrifugal compressor includes a volute base block, a volute cover plate, an impeller, a diffuser-adjusting assembly, a radial constraint assembly, an axial constraint assembly and a driving assembly.

    Non-contact blood pressure measurement system and non-contact blood pressure value calculation method thereof
    2.
    发明授权
    Non-contact blood pressure measurement system and non-contact blood pressure value calculation method thereof 有权

    公开(公告)号：US11839452B2

    公开(公告)日：2023-12-12

    申请号：US17325407

    申请日：2021-05-20

    Applicant: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Chao-Hsiung Tseng ,  Tzu-Jung Tseng

    IPC: A61B5/021 ,  A61B5/00

    CPC classification number: A61B5/02125 ,  A61B5/0004 ,  A61B5/02116 ,  A61B5/7228 ,  A61B5/7285

    Abstract: A non-contact blood pressure measurement system and a non-contact blood pressure value calculation method thereof are disclosed. The non-contact blood pressure measurement system includes a measurement module, a signal processing module, and a calculation module. The measurement module measures a physiological signal of a subject being tested in a non-contact manner. The signal processing module is used to obtain a forward pressure wave and a backward pressure wave according to the physiological signal of the subject being tested. The calculation module is used to find out a reflected pulse transit time between the forward pressure wave and the backward pressure wave so as to substitute the reflected pulse transit time and a plurality of correction parameters into a blood pressure algorithm formula to calculate an estimated diastolic blood pressure and an estimated systolic blood pressure of the subject being tested.

    Non-contact phase-locked and self-injection-locked vital sign sensor
    5.
    发明授权
    Non-contact phase-locked and self-injection-locked vital sign sensor 有权

    公开(公告)号：US11368160B2

    公开(公告)日：2022-06-21

    申请号：US16402301

    申请日：2019-05-03

    Applicant: National Taiwan University of Science and Technology

    Inventor： Chao-Hsiung Tseng ,  Li-Te Yu

    IPC: A61B5/05 ,  H03L7/093 ,  H02M3/07 ,  H04L27/152 ,  H01Q1/24 ,  G01S13/88 ,  G01S7/282 ,  H04L7/033 ,  A61B5/11 ,  A61B5/024 ,  A61B5/08

    Abstract: A non-contact phase-locked and self-injection-locked vital sign sensor includes a self-oscillating voltage-controlled frequency-adjustable radiating element and a phase-locked loop. The self-oscillating voltage-controlled frequency-adjustable radiating element is used for transmitting an oscillation signal to an organism and for receiving a corresponding reflected signal from the organism to be posed at a self-injection-locked state, the oscillation signal being tuned by a vital sign of the organism to form a frequency-tuned signal. The phase-locked loop is used for demodulating the frequency-tuned signal to obtain a corresponding vital signal of the organism. By comparing the oscillation signal frequency-eliminated and outputted from the self-oscillating voltage-controlled frequency-adjustable radiating element with a reference signal, a corresponding comparison result is used to vary a phase of the frequency-divided oscillation signal for maintaining the same phase of the reference signal. Thereupon, the oscillation frequency can be stabilized, and the measurement sensitivity can be enhanced.

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