Boarding and deboarding detection apparatus and method
In a detection apparatus (boarding/exiting detection apparatus), an acquisition unit (second acquisition unit) acquires an acceleration of a vehicle in a period determined based on a first time point when a door of the vehicle is opened and a second time point when the door is closed after the first time point. A determination unit determines that a passenger of the vehicle gets on or gets off the vehicle, based on a temporal variation in the acceleration acquired.
1. A detection apparatus comprising:
an acquisition unit configured to acquire an acceleration of a vehicle in a period determined based on a first time point when a door of the vehicle is opened and a second time point when the door is closed after the first time point;
a determination unit configured to determine that a passenger of the vehicle gets on or gets off the vehicle, based on a temporal variation in the acceleration acquired; and
a derivation unit,
wherein the acquisition unit acquires the acceleration in a period from the first time point to the second time point, and
the determination unit determines that the passenger gets on or gets off the vehicle in accordance with whether the acceleration increases or decreases in the period from the first time point to the second time point,
the derivation unit derives an indicator indicating a tendency of the temporal variation in the acceleration in a longitudinal direction in the period from the first time point and the second time point and supplies the derived indicator to the determination unit,
the indicator indicates whether the acceleration in this period is increasing or decreasing, and
the indicator shows a tendency of variation in a pitching angle θ of the vehicle in this period.
2. A detection apparatus comprising:
a first acquisition unit configured to acquire an acceleration of a vehicle in a period determined based on a first time point when a door of the vehicle is opened and a second time point when the door is closed after the first time point;
a second acquisition unit;
a determination unit configured to determine that a passenger of the vehicle gets on or gets off the vehicle, based on a temporal variation in the acceleration acquired,
wherein the first acquisition unit acquires the acceleration in a first period defined based on the first time point and a second period defined based on the second time point,
the determination unit determines that the passenger gets on or gets off the vehicle based on a difference between a statistical value of the acceleration in the first period and a statistical value of the acceleration in the second period,
the second acquisition unit acquires time series data for acceleration in a longitudinal direction in the first period defined based on the first time point to and in the second period defined based on the second time point, and
the first period and the second period do not overlap.
3. The detection apparatus according to claim 1 , wherein
the determination unit is further configured to determine that the vehicle is loaded with cargo or that the cargo is unloaded from the vehicle.
4. A detection method comprising:
acquiring an acceleration of a vehicle in a period determined based on a first time point when a door of the vehicle is opened and a second time point when the door is closed after the first time point; and
determining that a passenger of the vehicle gets on or gets off the vehicle, based on a temporal variation in the acceleration acquired;
deriving an indicator indicating a tendency of the temporal variation in the acceleration in a longitudinal direction in the period from the first time point and the second time point,
wherein the indicator indicates whether the acceleration in this period is increasing or decreasing, and
the indicator shows a tendency of variation in a pitching angle θ of the vehicle in this period.
5. The detection apparatus according to claim 1 , wherein
the derivation unit derives a moving average in a predetermined segment in time series data for acceleration between the first time point and the second time point, subjects the time series data for the derived moving average to regression analysis, and derives a regression line L 1 given by y=ax+b, and
the derivation unit defines an inclination a of the regression line L 1 as the indicator.
6. The detection apparatus according to claim 2 , wherein
the first period and the second period are set to exclude a period in which the acceleration varies due to boarding or exiting of a passenger.
7. The detection apparatus according to claim 2 , wherein
the first period and the second period are set to exclude a period in which the vehicle is being braked or driven to produce acceleration.
8. The detection apparatus according to claim 2 , wherein
the determination unit is further configured to determine that the vehicle is loaded with cargo or that the cargo is unloaded from the vehicle.
9. The detection apparatus according to claim 1 , wherein the acquisition unit, the determination unit, and the derivation unit are each implemented with a hardware processor.
10. The detection apparatus according to claim 2 , wherein the first acquisition unit, the determination unit, and the second acquisition unit are each implemented with a hardware processor.