| 摘要 |
A mobile device includes a mobile section having left and right independently and concurrently driven wheels. The mobile device can rotate about the axis thereof by spinning the wheels in directions opposite to each other. The mobile device further includes a sensor to detect an obstacle in front. The mobile device activates the sensor while rotating 360 degrees by spinning the left and right wheels in opposite directions and determines the presence of an obstacle in the vicinity. The mobile device then determines an area determined as an area containing no obstacle to be an area where the mobile device is able to freely move around.
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