公开(公告)号：US11860266B2

公开(公告)日：2024-01-02

申请号：US17169568

申请日：2021-02-08

Applicant: RichWave Technology Corp.

Inventor： Keng-Hao Liu ,  Han-Jieh Chang ,  Hsiang-Feng Chi

IPC: G01S13/56 ,  A61B5/0507 ,  A61B8/08 ,  G01S13/58

CPC classification number: G01S13/56 ,  A61B5/0507 ,  A61B8/488 ,  G01S13/58

Abstract: A method of detecting a life includes receiving an echo signal including an in-phase component and a quadrature component, performing a preprocessing procedure on the echo signal to generate a preprocessed signal, generating, according to the preprocessed signal, complex conjugate data associated with the in-phase component and the quadrature component, performing a first time-domain-to-frequency-domain transform on the complex conjugate data to generate Doppler spectrogram data comprising a plurality of positive velocity energies and a plurality of negative velocity energies, generating combined Doppler spectrogram data according to the plurality of positive velocity energies and the plurality of negative velocity energies, performing a second time time-domain-to-frequency-domain transform on the combined Doppler spectrogram data to generate spectrum data, and determining whether a life is detected according to the spectrum data.

公开(公告)号：US20210255302A1

公开(公告)日：2021-08-19

申请号：US17169568

申请日：2021-02-08

Applicant: RichWave Technology Corp.

Inventor： Keng-Hao Liu ,  Han-Jieh Chang ,  Hsiang-Feng Chi

IPC: G01S13/56 ,  G01S13/58 ,  A61B8/08 ,  A61B5/0507

Abstract: A method of detecting a life includes receiving an echo signal including an in-phase component and a quadrature component, performing a preprocessing procedure on the echo signal to generate a preprocessed signal, generating, according to the preprocessed signal, complex conjugate data associated with the in-phase component and the quadrature component, performing a first time-domain-to-frequency-domain transform on the complex conjugate data to generate Doppler spectrogram data comprising a plurality of positive velocity energies and a plurality of negative velocity energies, generating combined Doppler spectrogram data according to the plurality of positive velocity energies and the plurality of negative velocity energies, performing a second time time-domain-to-frequency-domain transform on the combined Doppler spectrogram data to generate spectrum data, and determining whether a life is detected according to the spectrum data.