Basal metabolism estimation device, basal metabolism estimation system, basal metabolism estimation method, and program

Patent metadata

Field	Value
Publication number	US-11779284-B2
Application number	US-202117364150-A
Country	US
Kind code	B2
Filing date	Jun 30, 2021
Priority date	Jul 3, 2020
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A basal metabolism estimation device includes: at least one memory configured to store instructions; and at least one processor configured to execute the instructions to: acquire first measurement data related to a left foot and second measurement data related to a right foot; identify a starting timing and an ending timing of a stance phase of each of the left and right feet based on the first and second measurement data; calculate a stride time for one cycle of movement of one of the feet during walking and a degree of asymmetry between the first measurement data in the stance phase of the left foot and the second measurement data in the stance phase of the right foot; and estimate basal metabolism based on the stride time and the degree of asymmetry.

First claim

What is claimed is:

1. A basal metabolism estimation device comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
acquire, from at least one sensor when worn by a user, first measurement data related to a left foot and second measurement data related to a right foot;
identify a starting timing and an ending timing of a stance phase of each of the left and right feet based on the first and second measurement data;
calculate a difference between a stride time and a reference time, the stride time being a time for one cycle of movement of one of the feet during walking;
calculate a degree of asymmetry between the first measurement data in the stance phase of the left foot and the second measurement data in the stance phase of the right foot; and

calculate a value of basal metabolism based on the difference and the degree of asymmetry.

2. The basal metabolism estimation device according to claim 1 , wherein the at least one processor is configured to execute the instructions to determine whether a part of the stance phase of the left foot temporally overlaps with a part of the stance phase of the right foot.

3. The basal metabolism estimation device according to claim 1 ,
wherein acquiring the first measurement data comprises acquiring measurement data of an acceleration of the left foot, and acquiring the second measurement data comprises acquiring measurement data of an acceleration of the right foot, and
calculating the degree of asymmetry comprises calculating a degree of asymmetry between a step time of the left foot and a step time of the right foot, the step time of the left foot being a time of the stance phase of the left foot, the step time of the right foot being a time of the stance phase of the right foot.

4. The basal metabolism estimation device according to claim 1 , wherein acquiring the first measurement data comprises acquiring measurement data of a foot pressure of the left foot, and acquiring the second measurement data comprises acquiring measurement data of a foot pressure of the right foot.

5. The basal metabolism estimation device according to claim 4 , wherein calculating the degree of asymmetry comprises calculating a degree of asymmetry between a step time of the left foot and a step time of the right foot, the step time of the left foot being a time of the stance phase of the left foot, the step time of the right foot being a time of the stance phase of the right foot.

6. The basal metabolism estimation device according to claim 4 , wherein calculating the degree of asymmetry comprises calculating a degree of asymmetry between a magnitude of the foot pressure of the left foot in the stance phase of the left foot and a magnitude of the foot pressure of the right foot in the stance phase of the right foot.

7. The basal metabolism estimation device according to claim 1 ,
wherein acquiring the first measurement data and the second measurement data is based on controlling a plurality sensors comprising the at least one sensor,
wherein the plurality of sensors comprise a left foot group of sensors that, when worn by the user, acquire at least part of the first measurement data, and
wherein the plurality of sensors comprises a right foot group of sensors that, when worn by the user, acquire at least part of the second measurement data.

8. A basal metabolism estimation system comprising:
at least one sensor that, when worn by a user, measures first data related to a left foot and second data related to a right foot;
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
identify a starting timing and an ending timing of a stance phase of each of the left and right feet based on the first and second data;
calculate a difference between a stride time and a reference time, the stride time being a time for one cycle of movement of one of the feet during walking;
calculate a degree of asymmetry between the first data in the stance phase of the left foot and the second data in the stance phase of the right foot; and
calculate a value of basal metabolism based on the difference and the degree of asymmetry.

9. The basal metabolism estimation system according to claim 8 , further comprising:
a plurality of sensors comprising the at least one sensor,
wherein the plurality of sensors comprise a left foot group of sensors that, when worn by the user, measure at least part of the first data, and
wherein the plurality of sensors comprises a right foot group of sensors that, when worn by the user, measure at least part of the second data.

10. A basal metabolism estimation method comprising:
acquiring, from at least one sensor when worn by a user, first measurement data related to a left foot and second measurement data related to a right foot;
identifying a starting timing and an ending timing of a stance phase of each of the left and right feet based on the first and second measurement data;
calculating a difference between a stride time and a reference time, the stride time being a time for one cycle of movement of one of the feet during walking;
calculating a degree of asymmetry between the first measurement data in the stance phase of the left foot and the second measurement data in the stance phase of the right foot; and
calculating a value of basal metabolism based on the difference and the degree of asymmetry.

11. The basal metabolism estimation method according to claim 10 ,
wherein acquiring the first measurement data and the second measurement data is based on controlling a plurality sensors comprising the at least one sensor,
wherein the plurality of sensors comprise a left foot group of sensors that, when worn by the user, acquire at least part of the first measurement data, and
wherein the plurality of sensors comprises a right foot group of sensors that, when worn by the user, acquire at least part of the second measurement data.

Assignees

• Nec Corp

Inventors

• Huang Chenhui
• Fukushi Kenichiro
• Sekiguchi Yusuke
• Yaguchi Haruki
• Honda Keita
• Izumi Shinichi
• Owaki Dai

Classifications

• A61B5/7278 Primary

  Artificial waveform generation or derivation, e.g. synthesizing signals from measured signals · CPC title

• A61B5/1038

  Measuring plantar pressure during gait · CPC title

• A61B5/4866

  Evaluating metabolism (using breath test A61B5/083) · CPC title

• G16H40/63

  for local operation · CPC title

• A61B5/6807

  Footwear · CPC title