Filament Winding Bobbin Diameter Detection
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Solution Overview
Problem
Existing filament winding methods require manual measurement of the bobbin diameter using calipers when a new bobbin is mounted, which is labor-intensive, prone to variations, and increases costs, as they lack automated detection mechanisms.
Innovation Solution
A filament winding method and apparatus that automatically detect the bobbin diameter by rotating the bobbin to oscillate a dancer while maintaining the filament stretched, using the length, oscillation angle, and rotation angle of the dancer to calculate the bobbin diameter without the need for additional detection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement of bobbin diameter using calipers is performed, then the bobbin diameter can be obtained, but operator burden increases and measurement results vary
Solution Approach 1:
The system performs self-measurement of the bobbin diameter by automatically detecting the position of the dancer during bobbin rotation and calculating the diameter from the detected data, eliminating the need for manual measurement by operators
Solution Approach 2:
The patent replaces the mechanical manual measurement system (calipers) with an automated detection system that uses sensors to detect dancer position and calculates diameter through control unit processing
2Extent of automation
If a winding bobbin diameter detecting means is mounted on the filament winding apparatus, then automated bobbin diameter detection is achieved, but efforts, time and costs increase
Solution Approach 1:
The patent makes the existing dancer device serve dual functions: its original tension application function and a new bobbin diameter measurement function, eliminating the need for separate detection devices
Solution Approach 2:
The measurement function is merged into the existing dancer device and control unit, combining multiple functions into existing components rather than adding separate systems
3Loss of information
If operator manually measures and inputs bobbin diameter, then initial parameters can be set, but time is consumed and productivity decreases
Solution Approach 1:
The system automatically detects and stores bobbin diameter data immediately when a new bobbin is mounted, performing the measurement action in advance before winding operations begin, so that all subsequent parameter settings can be automatically configured
Solution Approach 2:
The control unit receives feedback from the dancer position detection, processes the data to calculate bobbin diameter, and uses this information to automatically set winding parameters, creating a closed-loop system that eliminates manual intervention
Data Source
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Figure 2B
AI summary
Provided are a filament winding method and a filament winding apparatus, in which, when a new bobbin (10) is mounted on a bobbin rotation driving device (20), the control device (60) rotates the bobbin to oscillate a dancer (30) while maintaining a state where a distal end of filament (11) unwound through the dancer is fixed further beyond the dancer and the filament is stretched. The control device obtains a bobbin diameter of the bobbin mounted on the bobbin rotation driving device based on a length (LD) of the dancer, an oscillation angle (θ1) of the dancer, and a rotation angle (θa) of the bobbin.