BIOMETRIC SENSING DEVICE

Abstract

A biometric detection device comprises at least one radar and an electronic control unit (ECU). The radar is mounted on a vehicle, transmits pulse waves of a predetermined frequency, and receives reflected pulse waves. The radar transmits and receives multiple times at predetermined intervals. The reception time of the reflected wave is longer than the time corresponding to the distance between the radar and the position furthest from the radar at the rear of the vehicle. Based on the received signals from these multiple transmissions and receptions, the ECU detects the presence or absence of a living body.