Menetelmä ja mittauslaitteisto kulmanopeuseron määrittämiseksi

• Main Authors: ARJANNE,PERTTI, TYNNINEN,PASI
• Format: Patent
• Language: Finnish; Swedish
• Published: 14.02.2003
• Edition: 7
• Subjects: CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

The invention relates to a method and measuring equipment for measuring the mutual rotating movement of a first (D) and a second (R) rotating member used in the treatment of a moving web (W), especially a paper web, in which pulses are produced by means of a first pulse sensor (S1) in proportion to the rotating movement of said first rotating member (D), and by means of a second pulse sensor (S2) pulses are produced in proportion to the rotating movement of said second rotating member (R). According to the invention the event times of the pulses produced by the first (S1) and the second (S2) pulse sensor are registered with precision, and the fit (F) formed in the pulse sequence produced by the first pulse sensor (S1) is utilized to determine a position (p') for each pulse of the second pulse sensor (S2), said position (p') indicating the accurate angular position of the first rotating member (D) at the event time of a pulse of said second pulse sensor (S2). A progression (d', d") of the angular position of the second rotating member (R) in relation to the movement of the first rotating member (D) is determined by means of the positions (p', p", p''') determined for the successive revolutions of the second rotating member (R). The invention enables a more precise determination of differences in the speeds of rotation.