US Patent 10480992 Vehicle passenger detection apparatus

A vehicle passenger detection apparatus is configured to monitor an occurrence of a passenger entering into a vehicle from a vacant seat state or an occurrence of the vacant seat state due to the passenger exiting from the vehicle, and to determine by calculations whether a detection value of a load sensor is stable before the passenger entered the vehicle or after the passenger exited the vehicle. Updating of a passenger determination result is executed even in a state in which a determination result from a vibration change amount judgment section indicates a disturbance has occurred, when the vehicle entry and exit determination section determines that the detection value of the load sensor is stable before the passenger entered the vehicle or after the passenger exited the vehicle.