Ring Spinning Yarn Piecing Guide Using State Memory
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Solution Overview
Problem
Conventional yarn piecing apparatuses for ring spinning machines require additional sensors to detect worker location, which is inefficient and prone to errors.
Innovation Solution
A ring spinning machine apparatus that uses yarn break detectors and a position detector with a state memory and worker's position determiner to guide workers to spindles with yarn breaks without additional sensors, utilizing yarn break sensors and indicator lamps to identify and communicate spindle states and worker locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional motion sensors are added to detect worker location, then the worker guidance function can be achieved, but the device complexity and cost increase
Solution Approach 1:
The system uses the yarn break detector to automatically determine worker position by detecting when a yarn break state changes to a non-yarn break state, eliminating the need for separate worker location sensors. The existing sensor serves dual purposes: detecting yarn breaks and tracking worker movement.
Solution Approach 2:
The yarn break detector is made multi-functional by using it both for its original purpose (detecting yarn breaks) and for a new purpose (detecting worker position). This allows one sensor to perform multiple functions, reducing the total number of sensors needed in the system.
2Measurement precision
If motion sensors are added to detect worker location, then guidance accuracy can be achieved, but the measurement precision requirements increase and errors become more prone
Solution Approach 1:
The system leverages the inherent reliability of the yarn break detector to determine worker position. Since the yarn break detector is already a reliable component designed for precise detection, using it to detect worker position through state changes maintains high measurement precision while avoiding the reliability issues associated with adding new sensor types.
3Adaptability or versatility
If additional sensors are installed on each spinning machine, then the yarn piecing assistance function is enabled, but the manufacturing cost and ease of manufacture worsen
Solution Approach 1:
The system achieves yarn piecing assistance functionality by repurposing the existing yarn break detector, eliminating the need for additional sensor installation. This self-service approach maintains the adaptability of the system while significantly improving ease of manufacture and installation.
Solution Approach 2:
By making the yarn break detector multi-functional, the system enables yarn piecing assistance without requiring additional sensors to be manufactured or installed. This reduces manufacturing complexity and installation time while maintaining the desired functionality.
Data Source
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AI summary
A ring spinning machine (10) that includes an apparatus for assisting in yarn piecing is provided. The apparatus includes a position detector (21), at least one guide (13, 30) that guides a worker (W) to a position of one of the spindles (11, 41, 42, 43, 44) having a yarn break, and a controller (25) that controls the guide (13, 30) based on the position of a spindle (11, 41, 42, 43, 44) having the yarn break and a location of the worker (W). The position detector (21) includes a state memory (22) and a worker's position determiner (23) that, when a state of any of the spindles (11, 41, 42, 43, 44) is changed from a yarn break state to a non-yarn break state, determines that the position of the spindle (11, 41, 42, 43, 44) as the location of the worker (W).