Vehicle, system for determining seat belt wearing condition, and method of determining seat belt wearing condition
A system that determines a condition of wearing of a seat belt, including: a marker provided on at least a part of the seat belt; an image capture processing unit that emits electromagnetic waves of the prescribed wavelength band toward a predetermined range and that creates an image indicating intensity distribution of electromagnetic waves of the prescribed wavelength band, based on reflected waves reflected in the predetermined range; a shape estimating unit that estimates a shape of an occupant based on the image, detects the marker from the image, and estimates a shape of the seat belt based on the marker detected; and a determining unit that determines the condition of wearing of the seat belt by the occupant, based on a positional relationship between the occupant and the seat belt.
1. A system that determines a condition of wearing of a seat belt for an occupant, comprising:
a marker provided on at least a part of the seat belt, the marker being configured to reflect or absorb electromagnetic waves of a prescribed wavelength band at a different rate from a material of the seat belt;
an image capture unit that emits electromagnetic waves of the prescribed wavelength band toward a predetermined range including the occupant seated in a seat; and
a processor configured to:
create an image indicating intensity distribution of electromagnetic waves of the prescribed wavelength band, based on reflected waves reflected in the predetermined range,
estimate a shape of the occupant based on the image,
detect the marker from the image,
estimate a shape of the seat belt based on the marker detected,
determine a physical size of the occupant based on the shape of the seat belt, and
determine the condition of wearing of the seat belt by the occupant, based on a positional relationship between the occupant and the seat belt after the shape of the occupant and the shape of the seat belt are estimated.
2. The system according to claim 1 , wherein:
the marker extends along a longitudinal direction of the seat belt; and
the processor determines that the occupant is wearing the seat belt when the seat belt is located at a position that matches a predetermined wearing pattern extending across a body of the occupant.
3. The system according to claim 1 , wherein the marker is provided on one surface of the seat belt.
4. The system according to claim 1 , wherein the processor is configured to give a notice that urges the occupant to wear the seat belt when the processor determines that the occupant is not wearing the seat belt.
5. The system according to claim 1 , wherein the electromagnetic waves of the prescribed wavelength band comprise radio waves having a wavelength included in a range of 3 to 300 mm.
6. A vehicle comprising:
a seat belt;
a marker provided on at least a part of the seat belt, the marker being configured to reflect or absorb electromagnetic waves of a prescribed wavelength band at a different rate from a material of the seat belt;
an image capture unit that emits electromagnetic waves of the prescribed wavelength band, toward a predetermined range including an occupant seated in a seat; and
a processor configured to:
create an image indicating intensity distribution of electromagnetic waves of the prescribed wavelength band, based on reflected waves reflected in the predetermined range;
estimate a shape of the occupant based on the image, detect the marker from the image, and estimate a shape of the seat belt based on the marker detected;
determine a condition of wearing of the seat belt by the occupant, based on a positional relationship between the occupant and the seat belt after the shape of the occupant and the shape of the seat belt are estimated; and
determine a physical size of the occupant based on the shape of the seat belt.
7. A method of determining a condition of wearing of a seat belt for an occupant, at least a part of the seat belt being provided with a marker configured to reflect or absorb electromagnetic waves of a prescribed wavelength band at a different rate from a material of the seat belt, the method comprising:
emitting electromagnetic waves of the prescribed wavelength band, toward a predetermined range including the occupant seated in a seat;
creating an image indicating intensity distribution of electromagnetic waves of the prescribed wavelength band, based on reflected waves reflected in the predetermined range;
estimating a shape of the occupant based on the image, detecting the marker from the image, and estimating a shape of the seat belt based on the marker detected;
determining the condition of wearing of the seat belt by the occupant, based on a positional relationship between the occupant and the seat belt after the shape of the occupant and the shape of the seat belt are estimated; and
determining a physical size of the occupant based on the shape of the seat belt.