| 摘要 |
PURPOSE:To enable a device to be simple and compact for achieving a highly accurate detection by detecting deviation of a movable means which is rotated according to inertia or outer force from a reference position. CONSTITUTION:When water 8 is located at a reference position to a container 4, quantity of light detected by light-receiving surfaces 14a and 14b is nearly equal. For example, when the container 4 is rotated in a counterclockwise direction from this state, the water 8 is shifted from the reference position and is rotated in a clockwise direction, thus enabling the quantity of light arriving at the light-receiving surface 14a from a light source 12 to be increased and that arriving at the light-receiving surface 14b to be reduced. Similarly, when the container 4 is rotated in a clockwise direction, the quantity of light arriving at the light-receiving surface 14a from the light source 12 is reduced and that arriving at the light-receiving surface 14b is increased, thus enabling deviation of the water which is a movable means from the reference position and the deviation direction to be detected. |
