| 摘要 |
<p>A method for measuring the condition of a nip (3) formed between two rollers (1, 2) in elastic nip contact, comprises measurement of the difference of peripheral speeds of the two rollers (1, 2) is measured, and the nip condition is derived from the measured peripheral speeds. The method is described for a case in which the rollers (1, 2) are a part of a paper making machine, a paper finishing machine or a printing machine, and wherein the rotational speeds of the rollers are operating speeds of the rollers (1, 2) when the respective machine is operating. The device for carrying out the method comprises a measuring device for measuring peripheral speeds of each of the rollers (1, 2). In particular, the device may comprise a measuring device (4, 5) for directly measuring surface speed of a roller (1, 2) directly, wherein the device may have a measuring wheel in contact with the roller surface, an optical system using visible or invisible rays and detecting surface structure or marks on the roller surface, a radar based system, and/or an electromagnetic system cooperating with signal generators in the roller.</p> |
