Particle Size Distribution Measuring Device Non-Target Spectrum Subtraction
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Solution Overview
Problem
Existing particle size distribution measuring devices struggle to accurately calculate the size distribution of a target particle group when a non-target particle group significantly influences the measurement, leading to inaccurate results due to overlapping light intensity spectra.
Innovation Solution
A device and program that irradiate a particle group with light, using a computing device to obtain an actual spectrum, calculate a non-target spectrum based on non-target particle size distribution data and refractive index, and subtract its influence to obtain a target spectrum for accurate measurement of the target particle size distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the particle size distribution is calculated by subtracting the non-target particle distribution from the overall particle distribution based on the actual spectrum, then the measurement process is simple, but the measurement precision deteriorates when the non-target particle group has a great influence on the actual spectrum
Solution Approach 1:
The patent segments the actual spectrum into two distinct components: the target particle spectrum and the non-target particle spectrum. By calculating the non-target spectrum separately using non-target particle size distribution data and refractive index, the method isolates the target particle signal for more accurate analysis
Solution Approach 2:
The patent extracts the non-target spectrum component from the actual spectrum by calculating it independently based on non-target particle characteristics. This extracted non-target spectrum is then removed from the actual spectrum to obtain a purified target spectrum, eliminating the interference of non-target particles
2Productivity
If the non-target particle group influence is not removed, then the measurement process is fast, but the reliability of the target particle size distribution calculation deteriorates
Solution Approach 1:
The patent performs preliminary calculation of the non-target spectrum using pre-acquired non-target particle size distribution data and refractive index before processing the actual spectrum. This preliminary action prepares the non-target component for subtraction, ensuring accurate separation while maintaining efficient processing
Solution Approach 2:
The patent introduces the non-target particle size distribution data and refractive index as intermediary parameters to calculate the non-target spectrum. These intermediaries serve as a bridge between the measured actual spectrum and the isolated target spectrum, enabling accurate decomposition
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
Enables accurate calculation of the particle size distribution of the target group even when a non-target particle group has a substantial impact, by isolating the target spectrum from the actual spectrum, thereby improving measurement precision.
Implementation Method 1
light intensity signal indicating a light intensity of diffracted and/or scattered light resulting from the particle group
Implementation Method 2
light intensity signal indicating a light intensity of diffracted and/or scattered light resulting from the particle group
Implementation Method 3
a plurality of photodetector configured to detect the light intensity of the diffracted and/or scattered light
Data Source
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AI summary
To enable the particle size distribution of a particle group which is a measurement target to be accurately calculated even in a case where a particle group which is not the measurement target has a great influence, a particle size distribution measuring device 100 irradiates with light the particle group which is the measurement target and which is accommodated in a cell 11 and calculates the particle size distribution of the particle group on the basis of a light intensity signal indicating a light intensity of diffracted/scattered light resulting from the particle group. The particle size distribution measuring device 100 includes an actual spectrum obtaining unit 21 that obtains an actual spectrum which is a light intensity spectrum obtained from the light intensity signal; a non-target spectrum calculating unit 22 that receives non-target particle size distribution data indicating a particle size distribution of a non-target particle group which is not the measurement target X and which is accommodated in the cell 11 and that calculates, on the basis of the non-target particle size distribution data, a non-target spectrum which is a light intensity spectrum to be obtained by irradiating the non-target particle group with light; a non-target spectrum removing unit 23 that calculates a target spectrum which is a light intensity spectrum obtained by subtracting an influence of the non-target spectrum from the actual spectrum; and a target particle size distribution calculating unit 24 that calculates the particle size distribution of the particle group which is the measurement target X on the basis of the target spectrum.