Yarn Parameter Detection Using Merged PCB Sensors
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Solution Overview
Problem
Existing yarn clearing devices on spinning or winding machines face complexity and expense due to the precise alignment requirements of multiple measuring cells with different sensor principles, leading to potential inaccuracies in measurement.
Innovation Solution
Arranging multiple measuring cells on a common flat support, such as a printed circuit board, where one cell is attached directly and the other is attached to the first cell, ensuring precise alignment without mechanical stress, allowing for varied board thickness and simpler, less expensive manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple measuring cells with different sensor principles are arranged on separate printed circuit boards, then the device can detect multiple yarn parameters (mass, thickness, foreign matter), but the device complexity increases and manufacturing becomes expensive due to precise alignment requirements
Solution Approach 1:
The patent combines multiple measuring cells (capacitive sensor for mass detection and optical sensor for thickness/foreign matter detection) onto a single printed circuit board. This merging eliminates the need for separate boards and their associated alignment requirements, reducing device complexity while maintaining the ability to detect multiple yarn parameters simultaneously
Solution Approach 2:
The single printed circuit board serves multiple functions by integrating both capacitive and optical measuring cells. This universal platform handles mass detection, thickness measurement, and foreign matter detection, replacing what would otherwise require multiple specialized boards and reducing overall system complexity
2Adaptability or versatility
If multiple measuring cells are arranged on separate printed circuit boards, then each cell can be optimized for its specific measuring principle, but manufacturing precision requirements increase due to the need for precise positioning and alignment
Solution Approach 1:
By merging all measuring cells onto one printed circuit board, the patent eliminates the interfaces between separate boards where positioning errors would occur. The single board provides a unified reference frame, ensuring that capacitive and optical sensors are automatically aligned relative to each other without requiring additional precision manufacturing steps
3Ease of manufacture
If separate printed circuit boards are used for different measuring cells, then modular assembly is possible, but the risk of measurement inaccuracies increases due to potential misalignment
Solution Approach 1:
The patent prioritizes measurement accuracy by merging all sensing elements onto a single rigid printed circuit board. This eliminates the relative movement and misalignment risks between separate boards, ensuring that the measuring gap remains consistent and measurements remain accurate throughout 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 ensures accurate and comparable measurements across cells, reducing manufacturing costs and minimizing measurement inaccuracies, while protecting optical components from dirt.
Implementation Method 1
With the capacitive yarn clearer, the yarn runs through a measuring capacitor. The measuring capacitor measures the dielectric properties of the yarn
Implementation Method 2
In the optical yarn clearer, the yarn is illuminated by a light source and light interacting with the yarn is detected by a light detector
Implementation Method 3
the yarn is illuminated by a light source and light interacting with the yarn is detected by a light detector. From this, for example, the yarn thickness or the presence of foreign matter can be determined
Implementation Method 4
The measuring capacitor measures the dielectric properties of the yarn, from which, for example, the yarn mass in the measuring capacitor or the yarn material composition can be determined
Data Source
Figure 1~4
Figure 5(a)~5(b)
AI summary
The device is used for detecting parameters on a thread-shaped test specimen (1), which is moved through a measuring gap (2) in the longitudinal direction of said specimen. The measuring gap comprises a first measuring cell (3) and a second measuring cell (5) for the detection of parameters. The first measuring cell (3) and the second measuring cell (5) are disposed on a common planar carrier (4) or on a circuit board, the plane of which is located perpendicular to the longitudinal direction of the test specimen (1). In this way, the measuring cells (3, 5) can be precisely aligned with each other, and the device is simple and cost-effective to produce.