| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection method for relatively determining X-, Y- and Z-axes and a device therefor. SOLUTION: The device includes an inner ball frame and an intermediate ball frame combined into the form of a tumbler with a light upper part and a heavy lower part. They are positioned within a ring frame in the different axial direction by positioning bearings. The inner ball frame and the intermediate ball frame can swing respectively about the X-axis and Y-axis and the ring frame is pivotally contacted with the inside of an outer bal case on a base by the positioning bearing in a direction perpendicular to the positioning bearing for the intermediate ball frame. Based on the relationship of movement caused by relative rotation occurring between zero-degree reference planes of both X- and Y-axes and the outer ball case when the inner ball frame and the intermediate ball frame become stationary after swinging in synchronism respectively along the X- and Y-axes, each angular plane of the outer ball case (Z) axis relative to X- and Y-axis actuation is measured from zero-degree reference graduations and longitude and latitude graduations provided at the respective upper ends of the inner ball frame, the intermediate ball frame and the outer ball case and from reference plane data to detect the data on one holizontal or vertical plane or of inclination.
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