| 摘要 |
The present invention provides a centrifugal separator comprising frame, a drive member configured to rotate a rotating part in relation to the frame around an axis of rotation (x); wherein the rotating part comprises a spindle and a centrifuge rotor enclosing a separation space, said rotating part being supported by the frame by at least one bearing device. The centrifugal separator further comprises a system for detecting rotation of said rotating part, said system comprising at least one first type of sector each occupying a first length of the perimeter of a member arranged for rotation with said rotating part, at least one second type of sector each occupying a second length of the perimeter of said member arranged for rotation, wherein the at least one second type of sector is spaced apart from said at least one first type of sector, and wherein the second length is different compared to said first length, and said at least one first and second types sectors are irregularly spaced around the perimeter of said member arranged for rotation. The system further comprises an inductive sensor arranged to detect said at least one first and second types of sectors and give rise to a binary pulse sequence upon rotation of said member arranged for rotation, and wherein the temporal widths of the binary pulses correspond to the lengths of said at least one first and said at least one second types of sectors, respectively. |
