| 摘要 |
A device for measuring surface roughness of an inner surface of a hollow element having a substantially constant inner cross-section. The device includes a probe for making contact with the inner surface of the hollow element, a mechanism straining the probe on the surface, a mechanism measuring movement of the probe, a first mechanism relatively moving the probe, configured to move the probe relative to the inner surface along a path only following the guide line, and a second relative movement mechanism configured to move the probe between at least two positions along the inner cross-section, the straining mechanism configured to strain the probe on the inner surface, regardless of the position of the probe along the inner cross-section. A measuring system can include such a device. |
