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.