Method for monitoring fiber tension by measuring fiber vibration frequency
US5079433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Oct 5, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2205/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A new-contact method for monitoring the tension in an optical waveguide fiber during drawing is provided. The motion of the fiber is sensed in a direction transverse to the direction in which the fiber is moving. The sensed motion is analyzed to determine a plurality of frequency components thereof, each frequency component having a magnitude, and one of the components constituting the maximum magnitude component. The frequency of the maximum magnitude component is doubled to obtain a doubled frequency. The presence of a frequency component near the doubled frequency is ascertained to verify that the maximum magntiude component is the principle harmonic frequency of motion of the fiber. The tension in the fiber is then determined from the verified principal harmonic frequency component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.