| 摘要 |
PCT No. PCT/FI97/00178 Sec. 371 Date Nov. 26, 1997 Sec. 102(e) Date Nov. 26, 1997 PCT Filed Mar. 19, 1997 PCT Pub. No. WO97/37203 PCT Pub. Date Oct. 9, 1997A measurement device and method for measuring tension in an optical fiber or wire. The measurement device includes a device for producing a vibration surge in the optical fiber or wire which vibrates at a certain, pre-selected frequency and advances as a linearly polarized wave. An optical location-sensitive detector measures the advancing speed (v) of the wave. An illuminator device illuminates the optical fiber or wire so that a shadow or an image of the vibrating fiber or wire is cast onto the indictor whereby the tension (T) of the optical fiber or wire is calculated from the equation T=v2xM, when M is the fiber mass per unit of length of the optical fiber or wire. The indicator device measures the time at which a departing wave surge passes by the indicator and the time at which an arriving wave surge reflected from a subsequent coating vat, or other wave reflector, passes by the indicator. The velocity of the wave is obtained from a difference in time between the departing wave surge and the arriving wave surge when the distance (X) between the indicator and the coating vat is known.
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