Detachable Framework for Optical Fiber Coil Winding
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Solution Overview
Problem
High-precision optical fiber gyros face challenges due to nonreciprocal phase differences caused by temperature and stress variations, which are exacerbated by non-ideal winding and curing techniques, leading to incomplete symmetry and uneven stress fields in optical fiber coils, failing to meet precision requirements.
Innovation Solution
A detachable framework for winding optical fiber coils with a demountable wheel hub and flanges, combined with a method involving thermosol coating, vacuum pressure impregnation, and controlled tension winding, allows for even adhesive distribution and stress reduction, enabling symmetry in temperature and stress fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the optical fiber coil is wound tightly on the framework to improve coil stability, then the vibration characteristics are improved, but the stress field becomes uneven causing nonreciprocal phase difference
Solution Approach 1:
The framework is divided into multiple independent segments (first framework segment, second framework segment, etc.) that can be separately adjusted and assembled. This segmentation allows each segment to be optimized independently for both stability and stress distribution, resolving the contradiction between tight winding for stability and uniform stress field for precision.
Solution Approach 2:
Different portions of the framework are designed with different structural characteristics to create locally optimized stress distribution. The framework segments have varying geometries and material properties that ensure uniform stress field in critical areas while maintaining overall coil stability, thus resolving the contradiction between global stability and local stress uniformity.
2Manufacturing precision
If quadrupole symmetry winding method is used to reduce nonreciprocal phase difference, then temperature field symmetry is improved, but incomplete symmetry remains due to non-ideal winding causing precision issues
Solution Approach 1:
The framework incorporates feedback mechanisms through its segmented design that allows measurement and adjustment of temperature field distribution. By monitoring temperature symmetry and adjusting framework segments accordingly, the system achieves complete quadrupole symmetry despite winding imperfections, resolving the contradiction between improved symmetry and complete reliability.
Solution Approach 2:
The framework segments are designed with adjustable parameters (dimensions, material properties, thermal conductivity) that can be optimized to compensate for winding imperfections. By changing these parameters, the temperature field symmetry is enhanced to achieve complete quadrupole symmetry, resolving the contradiction between partial symmetry improvement and complete symmetry reliability.
3Strength
If curing is performed to improve vibration characteristics and repetition property, then coil rigidity is improved, but nonreciprocal phase difference is not completely eliminated
Solution Approach 1:
The framework is segmented into multiple independent parts that can be cured separately and then assembled. This segmentation allows each segment to achieve optimal rigidity through curing while maintaining the ability to adjust relative positions for complete symmetry, thus resolving the contradiction between improved rigidity and complete phase difference elimination.
Solution Approach 2:
The framework segments are designed with controlled asymmetric features that, when assembled in specific configurations, create overall symmetric stress and temperature fields. This approach allows the cured structure to maintain high rigidity while achieving the symmetry needed to eliminate nonreciprocal phase difference, resolving the contradiction between strength and precision.
4Manufacturing precision
If the framework structure is made complex to improve temperature and stress field control, then precision is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The framework is divided into standardized segments that can be manufactured independently using conventional processes and then assembled. This segmentation achieves complex field control precision through modular design rather than monolithic complexity, reducing manufacturing difficulty and cost while maintaining high precision temperature and stress field control.
Solution Approach 2:
The framework uses parameter optimization within simple geometric forms rather than complex shapes. By carefully selecting dimensions, materials, and thermal conductivity parameters of simple segmented structures, the invention achieves high field control precision without requiring complex manufacturing processes, thus resolving the contradiction between precision and manufacturing simplicity.
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
The solution improves temperature stability and vibration characteristics of optical fiber coils, reducing non-reciprocal errors and enhancing the precision of high-precision optical fiber gyros by ensuring even adhesive distribution and stress matching, while simplifying the detachment process and reducing damage risks.
Implementation Method 1
performing impregnation with curing adhesive under vacuum pressure
Implementation Method 2
coating a layer of thermosol on the surface of the framework
Implementation Method 3
how to make the optical fiber coil reach the heat balance quickly
Implementation Method 4
the heat expansion of the framework of the optical fiber coil and unevenness of the heat field
Implementation Method 5
how to reduce the influence of the framework to the optical fiber coil
Data Source
AI summary
A detachable framework used for winding optical fiber coils and a method of producing optical fiber coils with this framework. A framework with a suitable structure is designed considering comprehensively three factors, i.e., the window ratio of an optical fiber coil, the precision of an optical fiber gyro and the easy detachment of the framework from the optical fiber coil. A surface treatment with the framework is performed by coating a layer of thermosol on the surface of the framework so the optical fiber coil can be easily detached from the framework after curing. The required length of optical fiber is winded around the optical fiber coil framework, accompanying with vacuum pressure impregnating with curing adhesive after winding and optical fiber coil curing subsequently. The framework is taken off from the optical fiber coil under the heating circumstances, thereby completing production of the non-framework optical fiber coil.