Spectral Filtered Fiber Mixture Detection With Imaging Sensors
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Solution Overview
Problem
Existing textile fiber detection devices struggle to accurately and efficiently detect transparent or similarly colored foreign materials in yarn due to the complexity of electromagnetic radiation analysis, leading to reduced spatial resolution and signal-to-noise ratio, especially when multiple characteristics are required.
Innovation Solution
A spectral filter is designed to have specific transmittance or reflectance properties that are a monotonous function of the mixture ratio of two components, allowing high spatial resolution and imaging without signal loss, using a radiation sensor that integrates the spectral filter to enhance or attenuate signals based on the chemical and color signatures of the materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors or temporal color modulation are used to detect foreign materials with similar colors or transparency, then detection accuracy is improved, but device complexity increases and spatial resolution deteriorates
Solution Approach 1:
The patent applies parameter changes by using a spectral filter with specific transmittance characteristics that have local maxima and minima adapted to the spectral properties of the two components. This allows the radiation sensor to receive a signal whose intensity is a monotonous function of the mixture ratio, enabling accurate detection without requiring multiple sensors or complex temporal modulation schemes.
2Measurement precision
If multiple sensors are used to detect multiple characteristics, then measurement precision is improved, but spatial resolution and signal-to-noise ratio are reduced
Solution Approach 1:
The patent merges multiple detection functions into a single radiation sensor by using a spectral filter that encodes the mixture ratio information in the intensity of the received radiation. The spectral filter's transmittance characteristics with local maxima and minima allow one sensor to perform what would otherwise require multiple sensors, thereby maintaining high spatial resolution and signal-to-noise ratio.
3Adaptability or versatility
If temporal modulation of input signal is used to match characteristics, then detection capability is improved, but device complexity and effort increase
Solution Approach 1:
Instead of modulating the input signal in time to match characteristics, the patent inverts the approach by adapting the spectral filter's transmittance characteristics to match the spectral properties of the components. This spatial/spectral filtering approach achieves the same detection capability without requiring temporal modulation, thereby reducing device complexity and effort.
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
The device provides a simple and reliable method to determine the mixture ratio of textile fiber components with high spatial resolution and signal-to-noise ratio, effectively distinguishing between base and foreign materials without requiring temporal modulation of the input signal.
Implementation Method 1
The transmittance or reflectance of the spectral filter in the spectral band has at least one local maximum and at least one local minimum
Implementation Method 2
The transmittance or reflectance of the spectral filter in the spectral band has at least one local maximum and at least one local minimum
Implementation Method 3
a radiation source for transmitting electromagnetic radiation in a spectral band through the textile fiber structure for interaction with the textile fiber structure
Implementation Method 4
a radiation sensor for receiving at least a part of the electromagnetic radiation after interaction with the textile fiber structure
Data Source
AI summary
A device for detecting a mixture ratio of two components of a textile fabric contains a radiation source for transmitting electromagnetic radiation in a spectral band in the direction of the textile fiber structure, a radiation sensor for receiving at least a part of the electromagnetic radiation, and a spectral filter with spectral properties in the spectral band for filtering at least one part of the electromagnetic radiation. The transmittance of the spectral filter in the spectral band has at least one local maximum and at least one local minimum. The spectral properties of the spectral filter in the spectral band are adapted to the spectral properties of the radiation source and each of the two components such that a radiation intensity received by the radiation sensor is a monotonous function of the mixture ratio of the two components. The device is simple in design and allows the use of spatially resolving imaging radiation sensors.