Optical Fiber Screening Test Preventing Broken End Beating
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Solution Overview
Problem
Current optical fiber screening test methods fail to reliably prevent fiber beating, a phenomenon where the broken terminal portion of an optical fiber collides with the already-wound fiber due to insufficient rotation stop timing and inertial forces, leading to damage and defective products, especially at high travel speeds.
Innovation Solution
The method involves adjusting the arrangement relationship and distance between the winding bobbin and upstream pulleys to ensure the already-wound outer circumference of the bobbin is not on the extension line of the optical fiber path, with specific length conditions (L0 > L1, L3 < L1/2, L3 < L2) to prevent fiber beating without extending the pass line or increasing equipment cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the rotation of the winding bobbin is stopped by increasing deceleration rate or applying mechanical/electrical control, then the response time to stop the bobbin is reduced, but the fiber beating phenomenon still occurs due to insufficient stop timing before the ruptured end reaches the bobbin
Solution Approach 1:
The invention moves the first pulley and/or second pulley in advance (before fiber breakage occurs) to change the optical fiber traveling path. This preliminary adjustment ensures that when the winding bobbin stops rotation after breakage, the already-wound outer circumferential surface is not positioned on the extension line of the optical fiber traveling path, preventing fiber beating without requiring instantaneous stop response
Solution Approach 2:
The invention makes the pulley positions dynamic and adjustable during the winding process. By enabling the first pulley and/or second pulley to move along the optical fiber traveling path, the system adapts the fiber path configuration in real-time to prevent the ruptured end from colliding with the already-wound fiber when the bobbin stops
2Reliability
If the optical fiber traveling path is extended to allow more time for the winding bobbin to stop, then the fiber beating is prevented, but the equipment size and cost increase
Solution Approach 1:
Instead of extending the fixed optical fiber traveling path, the invention dynamically adjusts the existing path by moving the first pulley and/or second pulley. This maintains compact equipment size while achieving the same fiber beating prevention effect through real-time path configuration changes
Solution Approach 2:
The movable pulleys serve dual functions: they guide the optical fiber during normal winding operation and simultaneously act as adjustable elements to prevent fiber beating when breakage occurs. This eliminates the need for separate fiber beating prevention mechanisms, reducing overall equipment complexity
3Reliability
If the optical fiber traveling path is extended to allow more time for the winding bobbin to stop, then the fiber beating is prevented, but the pass line length increases
Solution Approach 1:
The invention performs preliminary movement of the first pulley and/or second pulley to reconfigure the optical fiber traveling path before fiber breakage occurs. This adjusts the path geometry to prevent fiber beating without extending the overall pass line length, as the same physical path is merely repositioned rather than lengthened
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents fiber beating by ensuring the broken terminal portion does not collide with the already-wound fiber, maintaining product quality and avoiding equipment cost increases, while being applicable to existing screening test apparatuses.
Implementation Method 1
a phenomenon that a broken terminal portion of the optical fiber (a ruptured end portion) beats the normal optical fiber (an optical fiber on an outer circumference of the winding bobbin) which has already been wound around the winding bobbin 23, that is, a phenomenon referred to as fiber beating, occurs in some cases
Implementation Method 2
the optical fiber sequentially runs along a first pulley 21 and a second pulley 22 on the receiving side and wound by a winding bobbin 23
Data Source
AI summary
An optical fiber screening test method in which while continuously travelling, an optical fiber passes a tension applying section which applies tension and the optical fiber which has passed the tension applying section is continuously wound by a winding bobbin is provided. The method includes running the optical fiber to which the tension has been applied along a first pulley and a second pulley sequentially, winding the optical fiber by the winding bobbin, and stopping rotation of the winding bobbin when the optical fiber is broken by applying the tension, and performing an adjustment so that an already-wound outer circumferential surface of the winding bobbin on which the optical fiber is already wound is not positioned on an extension line of a linear optical fiber travelling path from the first pulley to the second pulley at a time when the rotation of the winding bobbin is stopped.