| 摘要 |
An obstacle detection apparatus includes first and second ultrasonic sensors, a control part, and a warning device for warning in accordance with a distance between at least one of the ultrasonic sensors and an obstacle. The control part sets the first ultrasonic sensor to a transmitting and receiving mode while setting the second ultrasonic sensor to a receiving mode, and then sets the first ultrasonic sensor to the receiving mode while setting the second ultrasonic sensor to the transmitting and receiving mode. Each of the ultrasonic sensors has a reception sensitivity to a reflected wave reflected by the obstacle. Each of the ultrasonic sensors includes a reception sensitivity control portion configured to increase the reception sensitivity when the receiving mode is set compared with when the transmitting and receiving mode is set.
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