Motion sickness estimation device, motion sickness prevention device, and motion sickness estimation method

Patent metadata

Field	Value
Publication number	US-10849496-B2
Application number	US-201716320317-A
Country	US
Kind code	B2
Filing date	Oct 5, 2017
Priority date	Oct 11, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A motion sickness estimation device includes: a line-of-sight oscillation detector to detect oscillation of a line of sight of an occupant by using an imaging device; an object oscillation detector to detect oscillation of an object located in the line of sight; an oscillation comparator to calculate an oscillation difference from the oscillation of the line of sight and the oscillation of the object; and a motion sickness determiner to determine, on a basis of the oscillation difference, whether the occupant is in a motion sickness state.

First claim

The invention claimed is:

1. A motion sickness estimation device comprising:
a line-of-sight oscillation detector to detect oscillation of a line of sight of an occupant by using an imaging device;
an object oscillation detector to detect oscillation of an object located in the line of sight;
an oscillation comparator to calculate an oscillation difference from the oscillation of the line of sight and the oscillation of the object; and
a motion sickness determiner to determine, on a basis of the oscillation difference, whether the occupant is in a motion sickness state.

2. The motion sickness estimation device of claim 1 , wherein the object oscillation detector detects the oscillation of the object by measuring an acceleration of the object.

3. The motion sickness estimation device of claim 1 , wherein the object oscillation detector detects the oscillation of the object by means of an imaging device.

4. The motion sickness estimation device of claim 1 , wherein the motion sickness determiner uses a time integral value of the oscillation difference in the determination.

5. The motion sickness estimation device of claim 1 , further comprising a warning presenter to issue a warning when the motion sickness determiner determines that the occupant has a sign of motion sickness.

6. A motion sickness prevention device comprising:
the motion sickness estimation device of claim 1 ; and
a conveyance controller,
wherein the conveyance controller controls, on a basis of a determination result of the motion sickness determiner, a state of a conveyance in which the occupant is riding to reduce the oscillation difference.

7. A motion sickness estimation device comprising:
a line-of-sight oscillation detector to detect oscillation of a line of sight of an occupant by using an imaging device;
a velocity measurer to measure a velocity of a conveyance in which the occupant is riding;
an outside imager to capture an outside of the conveyance and measure a distance between the conveyance and an object located in the outside;
an object oscillation detector to detect, when the object forms a pattern in which the object periodically repeats with respect to a traveling direction in which the object is captured by the outside imager, a period at which the object repeats with respect to the traveling direction, as oscillation of the object, from the velocity and the distance;
an oscillation comparator to calculate an oscillation difference from the oscillation of the line of sight and the oscillation of the object; and
a motion sickness determiner to determine, on a basis of the oscillation difference, whether the occupant is in a motion sickness state.

8. A motion sickness estimation method comprising:
detecting oscillation of a line of sight of an occupant by using an imaging device;
detecting oscillation of an object located in the line of sight;
calculating an oscillation difference from the oscillation of the line of sight and the oscillation of the object; and
determining, on a basis of the oscillation difference, whether the occupant is in a motion sickness state.

Assignees

• Mitsubishi Electric Corp

Inventors

• Murakami Takuya
• NAKAMURA Yudai
• Naito Masahiro

Classifications

• A61B5/0077

  Devices for viewing the surface of the body, e.g. camera, magnifying lens · CPC title

• A61B5/6893

  Cars · CPC title

• A61B5/16

  Devices for psychotechnics (using teaching or educational appliances G09B1/00 - G09B7/00); Testing reaction times {; Devices for evaluating the psychological state} · CPC title

• A61M21/00

  Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis · CPC title

• A61B5/18 Primary

  for vehicle drivers {or machine operators} · CPC title