Biological signal detection device

Patent metadata

Field	Value
Publication number	US-10058304-B2
Application number	US-201615560729-A
Country	US
Kind code	B2
Filing date	Mar 17, 2016
Priority date	Mar 23, 2015
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A biological signal detection device including a first FFT transformer that performs fast Fourier transformation on a signal of a first sensor, and that outputs a complex data row formed by a first real part data row and a first imaginary part data row; a second FFT transformer that performs fast Fourier transformation on a signal of a second sensor, and that outputs a complex data row formed by a second real part data row and a second imaginary part data row; a frequency component subtractor that subtracts the first real part data row from the second real part data row to output a noise-removed first real part data row; and a FFT inverse transformer that performs fast Fourier inverse transformation on the noise-removed first real part data row and the second imaginary part data row.

First claim

The invention claimed is:

1. A biological signal detection device comprising:
a first FFT transformer that performs fast Fourier transformation on a signal of a first sensor, and that outputs a complex data row formed by a first real part data row and a first imaginary part data row;
a second FFT transformer that performs fast Fourier transformation on a signal of a second sensor, and that outputs a complex data row formed by a second real part data row and a second imaginary part data row;
a frequency component subtractor that subtracts the first real part data row from the second real part data row to output a noise-removed first real part data row; and
a FFT inverse transformer that performs fast Fourier inverse transformation on the noise-removed first real part data row and the second imaginary part data row.

2. The biological signal detection device according to claim 1 ,
wherein the first sensor is a Doppler sensor, and
wherein the second sensor is an electric field-type sensor that detects variation in impedance of a human body, which is a person-to-be-measured, as a biological signal.

Assignees

• Kyushu Inst Tech
• Ai Tech Inc

Inventors

• Sato Yasushi

Classifications

• A61B8/5269

  involving detection or reduction of artifacts · CPC title

• A61B8/488

  involving Doppler signals · CPC title

• A61B5/7257

  using Fourier transforms · CPC title

• A61B5/053 Primary

  Measuring electrical impedance or conductance of a portion of the body · CPC title

• A61B8/02

  Measuring pulse or heart rate · CPC title