Rf doppler bio-signal sensor for continuous heart rate variability and blood pressure monitoring

Patent metadata

Field	Value
Publication number	US-2016228010-A1
Application number	US-201614988629-A
Country	US
Kind code	A1
Filing date	Jan 5, 2016
Priority date	Feb 11, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

A method implemented by a device to measure a bodily parameter includes transmitting, by a transmit (Tx) antenna of an antenna pair, a first radar pulse to a receive (Rx) antenna of the antenna pair. The method also includes receiving, by the receive (Rx) antenna, the first radar pulse. The first radar pulse travels through a radar target between the Tx antenna and the Rx antenna. The method further includes transmitting, by the Tx antenna, a second radar pulse to the Rx antenna. In addition the method includes receiving, by the Rx antenna, the second radar pulse, wherein the second radar pulse travels through the radar target between the Tx antenna and the Rx antenna. The method also includes determining a bodily parameter within the radar target as a function of the transmission and the reception of the first radar pulse and the second radar pulse.

First claim

What is claimed is:

1 . A device to measure a bodily parameter, the device comprising:
an antenna pair including a transmit (Tx) antenna configured to transmit one or more radar pulses and a receive (Rx) antenna configured to receive the one or more radar pulses, wherein the Tx antenna and the Rx antenna are positioned so that a radar target can be positioned between the Tx antenna and the Rx antenna; and a processor configured to:
control the Tx antenna to transmit a first radar pulse and a second radar pulse,
control the Rx antenna to receive the first radar pulse and the second radar pulse, wherein the first radar pulse and the second radar pulse travel through the radar target, and
determine a bodily parameter within the radar target as a function of the transmission and the reception of the first radar pulse and the second radar pulse.

2 . The device of claim 1 , wherein the processor is configured to determine the bodily parameter within the radar target by detecting a phase shift between the received first radar pulse and the received second radar pulse.

3 . The device of claim 1 , wherein the bodily parameter includes at least one of a fluid velocity of a fluid travelling through a channel within the radar target or a cross-sectional area of the channel.

4 . The device of claim 3 , wherein the processor is further configured to estimate a pressure of the fluid within the channel as a function of at least one of the fluid velocity of the fluid travelling through the channel or the cross-sectional area of the channel.

5 . The device of claim 1 , further comprising:
a second antenna pair including a second transmit (Tx) antenna configured to transmit one or more radar pulses and a second receive (Rx) antenna configured to receive the one or more radar pulses, wherein the second Tx antenna and the second Rx antenna are positioned so that a radar target can be positioned between the second Tx antenna and the second Rx antenna.

6 . The device of claim 5 , wherein the second antenna pair are position so that one or more radar pulses transmitted from the second transmit antenna reaches the radar target orthogonally relative to the one or more radar pulses transmitted from the second transmit antenna.

7 . The device of claim 5 , wherein the second antenna pair are sub-mmWave antennas.

8 . The device of claim 5 , further comprising:
a third antenna pair including a third transmit (Tx) antenna configured to transmit one or more radar pulses and a third receive (Rx) antenna configured to receive the one or more radar pulses, wherein the radar Tx antenna and the second Rx antenna are positioned so that a radar target can be positioned between the third Tx antenna and the third Rx antenna.

9 . The device of claim 1 , wherein the device comprises at least one of a wristwatch, an armband, a torso-band, or one or more patches.

10 . A device to measure a bodily parameter, the device comprising:
an antenna pair including a transmit (Tx) antenna configured to transmit one or more radar pulses and a receive (Rx) antenna configured to receive the one or more radar pulses, wherein the Rx antenna is positioned to receive the one or more radar pulses transmitted from the Tx antenna and reflected off of a radar target; and a processor configured to:
control the Tx antenna to transmit a first radar pulse and a second radar pulse,
control the Rx antenna to receive the first radar pulse and the second radar pulse, wherein the first radar pulse and the second radar pulse are reflected off of the radar target,
determine a movement direction of the radar target relative to the antenna pair, and
determine the bodily parameter within the radar target as a function of (1) the movement direction and (2) the transmission and the reception of the first radar pulse and the second radar pulse.

11 . The device of claim 10 , wherein the Tx antenna and the Rx antenna are positioned on a same plane that is adjacent to the radar target.

12 . The device of claim 10 , wherein the processor is configured to determine the bodily parameter within the radar target by detecting a phase shift between the received first radar pulse and the received second radar pulse.

13 . The device of claim 10 , wherein the bodily parameter includes at least one of a fluid velocity of a fluid travelling through a channel within the radar target or a cross-sectional area of the channel.

14 . The device of claim 13 , wherein the processor is further configured to estimate a pressure of the fluid within the channel as a function of at least one of the fluid velocity of the fluid travelling through the channel or the cross-sectional area of the channel.

15 . The device of claim 10 , wherein the device comprises at least one of a wristwatch, an armband, a torso-band, or one or more patches.

16 . A method implemented by a device to measure a bodily parameter, the method comprising:
transmitting, by a transmit (Tx) antenna of an antenna pair, a first radar pulse to a receive (Rx) antenna of the antenna pair; receiving, by the receive (Rx) antenna of the antenna pair, the first radar pulse, wherein the first radar pulse travels through a radar target between the Tx antenna and the Rx antenna; transmitting, by the Tx antenna, a second radar pulse to the Rx antenna; receiving, by the Rx antenna, the second radar pulse, wherein the second radar pulse travels through the radar target between the Tx antenna and the Rx antenna; and determining a bodily parameter within the radar target as a function of the transmission and the reception of the first radar pulse and the second radar pulse, wherein the first radar pulse and the second radar pulse comprise a Doppler radar pulse.

17 . The method of claim 16 , wherein determining a bodily parameter comprises detecting a phase shift between the received first radar pulse and the received second radar pulse.

18 . The method of claim 16 , wherein the bodily parameter includes at least one of a fluid velocity of a fluid travelling through a channel within the radar target or a cross-sectional area of the channel.

19 . The method of claim 18 , further comprising estimating a pressure of the fluid within the channel as a function of at least one of the fluid velocity of the fluid travelling through the channel or the cross-sectional area of the channel.

20 . The method of claim 16 , wherein the device comprises at least one of a wristwatch, an armband, a torso-band, or one or more patches.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Insoo
• Huang Daquan
• Oh Jungsuek
• Bhagat Yusuf A
• Lai Sean D
• Homer Johnny T

Classifications

• A61B5/0507

  using microwaves or terahertz waves · CPC title

• A61B5/0285

  Measuring or recording phase velocity of blood waves · CPC title

• A61B5/0015

  characterised by features of the telemetry system · CPC title

• H04Q9/00

  Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom · CPC title

• A61B5/021 Primary

  Measuring pressure in heart or blood vessels · CPC title