Yarn Pickup Device Detection via Segmented Optical Sensor
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Solution Overview
Problem
Conventional yarn pull-out devices face issues with wiring load and detection time due to the movement of detection parts, leading to increased yarn joining time and potential yarn waste.
Innovation Solution
A yarn pull-out device with a detection part positioned differently from the move and catch part, utilizing a light emitting and receiving system within a pipe part to quickly detect yarns without applying load on wiring, and incorporating a power transmission mechanism for efficient yarn handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection part is attached to the move and catch part at the farthest position from the pivot shaft, then the yarn detection capability is improved, but the wiring load increases and wiring lifetime decreases
Solution Approach 1:
The device is divided into two independent functional parts: the move and catch part (with suction nozzle) that moves to catch yarn, and the detection part that remains stationary. This segmentation allows each part to perform its function independently without compromising the other.
Solution Approach 2:
A light passing part (transparent or translucent member) is introduced as an intermediary between the move and catch part and the detection part. This intermediary allows optical signals to pass through while maintaining structural integrity and preventing wiring load issues.
2Duration of action of stationary object
If the detection part is arranged near the pivot shaft or downstream side to reduce wiring load, then the wiring lifetime is improved, but the yarn detection time increases
Solution Approach 1:
The light passing part serves as an intermediary that enables the detection part to be positioned at the optimal location for early yarn detection while maintaining a stationary position to avoid wiring load issues. This resolves the time-lifetime contradiction.
Solution Approach 2:
The detection mechanism uses optical fields (light emission and reception) instead of mechanical contact or movement. This substitution allows the detection part to remain stationary while achieving fast yarn detection through optical signal transmission through the light passing part.
3Ease of operation
If the move and catch part moves to the catching position to catch yarn, then the yarn catching capability is improved, but the wiring connected to the detection part experiences increased load and potential damage
Solution Approach 1:
The system is segmented into a movable component (move and catch part with suction nozzle) and a stationary component (detection part). This segmentation ensures that only the necessary catching mechanism moves, while the detection system remains fixed to maintain wiring reliability.
Solution Approach 2:
The light passing part acts as an intermediary structure that allows the movable catch mechanism to approach and catch yarn effectively while the detection part remains stationary, thus preventing wiring load and damage during the catching operation.
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 configuration allows for early and accurate detection of yarns, reducing yarn joining time and minimizing yarn waste, while also reducing the burden on wiring and improving the efficiency of the winding process.
Implementation Method 1
The light receiving part receives light which is reflected at the detecting position from emitted light from the light emitting part
Implementation Method 2
The light receiving part receives light which is passed through the detecting position from emitted light from the light emitting part
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A yarn pull-out device (28) includes an upper yarn catch and guide device (30) and a detection part (68). The upper yarn catch and guide device (30) has a move and catch part (30a) which moves from a waiting position to a catching position in a winding part (17) side, sucks and catches a wound yarn that is a yarn in the winding part (17) side. A detection part (68) detects the wound yarn caught by the upper yarn catch and guide device (30). The move and catch part (30a) approaches the detection part (68) by moving from the waiting position to the catching position (that is, the detection part (68) is provided in a position other than the position of the move and catch part (30a)), the detection part (68) detects the presence or absence of the wound yarn within the move and catch part (30a) moved to the catching position.