Patent ID: 9205808
Filing Date: 2015-12-08
Classification: B60R,G01S,G08B

Abstract:
1. An intrusion detection device, detecting an intrusion of a human into an interior of an automobile, and comprising: a transmission unit configured to transmit, when receiving an oscillation signal with a specified frequency, ultrasonic waves with said specified frequency to the interior; a receiving unit configured to convert, when receiving an ultrasonic wave propagating in the interior, the received ultrasonic wave into an electrical signal; a mixing unit configured to mix the electrical signal outputted from the receiving unit with the oscillation signal; and a determining unit configured to determine whether or not a human is present in the interior, based on a signal outputted from the mixing unit, wherein the determining unit is configured to control the transmission unit such that the transmitting of the ultrasonic waves is stopped until a level of the signal outputted from the mixing unit exceeds a predetermined threshold, the determining unit being configured to allow the transmission unit to transmit the ultrasonic waves when the level exceeds the predetermined threshold.