| 摘要 |
PROBLEM TO BE SOLVED: To provide a periphery monitoring device capable of showing accurate information about a periphery of a vehicle. SOLUTION: An article at a periphery of a vehicle is detected in accordance with an output signal from an ultrasonic wave sensor 5 that is mounted on the vehicle and detects a reflection wave from the article. Before determining whether or not the article is a moving body in accordance with a change with lapse of time in a voltage of an output signal from the ultrasonic wave sensor 5, a distance to the article is computed for every predetermined time interval on the basis of the output signal of the ultrasonic wave sensor 5, and then it is determined whether or not the article is a moving body on the basis of a change of the distance (S110). When it is determined that the article is not moved, when there is a change with lapse of time in the voltage of the output signal from the ultrasonic wave sensor 5 about the identical article, it is determined that the article is a moving body. For example, a peak voltage difference of the output signal due to the lapse of time is computed as a fluctuation amount. When the fluctuation amount is greater than a predetermined threshold, it is determined that the article is the moving body (S120). When it is determined that the article is the moving body, the determined result is transmitted (S130). COPYRIGHT: (C)2009,JPO&INPIT
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