| 摘要 |
The present invention relates to a hydraulic, pneumatic or another similar cylinder (1), comprising a cylinder sleeve (2) and a combination (3) of a piston and a piston rod arranged to move axially in the cylinder sleeve and means (4) for the determination of a position of the piston rod relative to the cylinder sleeve (2), which means consist of property variations (5) provided on the piston rod concerning a capability of the surface of the piston rod (3) of reflecting optical radiation and of a sensor (6) for detecting these property variations, which sensor (6) comprises at least one combination of a light source and a receiver. The property variations (5) on the piston rod have been provided according to the invention by means of a laser beam both efficiently and advantageously. |
