Yarn Winding Device Contact State Detection

The patent replaces direct mechanical contact detection with a speed-based detection system. The package-peripheral-speed acquisition section measures the peripheral speed of the bobbin or package, and the roller-peripheral-speed calculation section calculates the peripheral speed of the touch roller. By comparing these speeds, the contact state is determined without requiring direct mechanical sensing at the contact point, thus resolving the information loss problem while maintaining shape control.

The patent introduces peripheral speed as an intermediary parameter to indirectly determine the contact state. Instead of directly measuring contact conditions, the system uses the peripheral speeds of the bobbin/package and touch roller as intermediaries. The contact-state determination section compares these speed values to infer contact state, effectively mediating between the shape control function and the contact detection function.

The package-peripheral-speed acquisition section serves multiple functions: it acquires speed data for contact state determination, and potentially for process control and optimization. The roller-peripheral-speed calculation section similarly serves both contact detection and process monitoring. By making these sections multi-functional, the patent reduces the need for separate dedicated contact detection hardware, thereby limiting the increase in device complexity while achieving contact state determination.

The system establishes a feedback loop where the contact-state determination section compares the peripheral speed of the bobbin/package with that of the touch roller to determine contact state. This feedback mechanism allows continuous monitoring and adjustment of winding conditions. The feedback approach enables contact state determination using existing speed measurement capabilities already present in the winding device, minimizing additional complexity.