Patent ID: 11947014
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 8:
9. A passenger monitoring method comprising:
obtaining, by a processor, a distance information corresponding to a distance to a passenger in a vehicle from a ranging sensor provided in the vehicle,
wherein the ranging sensor includes a first ranging sensor to scan a first scanning region and a second ranging sensor to scan a second scanning region,
wherein the first scanning region and the second scanning region include an overlapping area at which the first scanning region and the second scanning region overlap;
estimating, by the processor, a state of congestion of the vehicle based on the distance information; and
counting, by the processor, a number of the passengers in the vehicle by subtracting the number of the passengers based on distance information corresponding to the overlapping area from a sum of the number of the passengers based on distance information output from the first ranging sensor and the number of the passengers based on distance information output from the second ranging sensor.