Abstract: A sensor mounting state determination device includes distance measurement section that measures a distance to a road surface based on time from transmission of a transmission wave to reception of a reflection wave by an ultrasonic sensor that is mounted to a vehicle to transmit a transmission wave toward a road surface and receive a reflection wave reflected off the road surface. There is further provided a determination section configured to determine not only that the ultrasonic sensor is correctly mounted when the distance measured by the distance measurement section is identical to a predetermined distance, but also that the ultrasonic sensor is incorrectly mounted when the distance measured by the distance measurement section is not identical to the predetermined distance.

Abstract: A detection device includes a transceiver and a detector. The transceiver causes an ultrasonic sensor used in a vehicle to alternately transmit a first transmission wave having a first amplitude level and a second transmission wave having a second amplitude level that is larger than the first amplitude level. The transceiver receives, from the ultrasonic sensor, a first received signal of the first transmission wave and a second received signal of the second transmission wave. The detector detects an obstacle based on the first received signal or the second received signal having a reception level larger than a predetermined threshold. The detector detects the obstacle based on the second received signal that does not include a second road surface reflected wave out of the second received signal.

Abstract: A sensor mounting state determination device includes distance measurement section that measures a distance to a road surface based on time from transmission of a transmission wave to reception of a reflection wave by an ultrasonic sensor that is mounted to a vehicle to transmit a transmission wave toward a road surface and receive a reflection wave reflected off the road surface. There is further provided a determination section configured to determine not only that the ultrasonic sensor is correctly mounted when the distance measured by the distance measurement section is identical to a predetermined distance, but also that the ultrasonic sensor is incorrectly mounted when the distance measured by the distance measurement section is not identical to the predetermined distance.