| 摘要 |
A device for measuring an interior contour of a hollow object has a probe bar (112) mounted within a ball (120) that pivots within a circular bearing (130) mounted on a base plate (132). The base plate (132) is mounted on the object above an external hole into the interior of the object with the lower end of the probe bar protruding into the object. The upper end (118) of the probe bar (112) is moved until the lower end (114) of the probe bar contacts the interior surface of the object and passes across the surface of the interior of the object. A laser tracker (100) tracks a laser target (110) mounted on the upper end of the probe bar (118), calculating the position of the lower end (114) and the contour of the interior surface from the position of the laser target (110) and known bar dimension data.
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