Optical Sensor Fluid Analysis Using Partial Least Squares
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Solution Overview
Problem
Existing methods for determining the characteristics of aqueous cleaning solutions, such as pH and chemical concentration, are laborious and prone to errors, particularly in time-sensitive applications, and do not allow for rapid analysis.
Innovation Solution
An optical sensor system that uses partial least squares analysis of transmission measurements to determine fluid characteristics, such as pH and chemical concentration, by directing light through the fluid medium and employing a characteristic model based on reference solutions with known properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chemical titration or invasive techniques are used to determine fluid properties, then measurement precision can be achieved, but the process becomes laborious and time-consuming
Solution Approach 1:
The patent replaces chemical titration methods with an optical sensing system that uses light transmission measurements and partial least squares analysis to determine fluid properties. This substitution eliminates the need for manual chemical procedures while maintaining measurement accuracy through mathematical modeling of optical data.
Solution Approach 2:
The patent performs preliminary action by creating a partial least squares model during an initial calibration phase using reference solutions with known properties. This pre-established model enables rapid prediction of fluid properties without repeating the full analytical process, thus reducing time loss in subsequent measurements.
2Measurement precision
If chemical titration methods are employed, then detailed property analysis is possible, but the ease of operation deteriorates due to laborious procedures
Solution Approach 1:
The patent replaces complex chemical titration operations with a simplified optical measurement system. The optical sensor automatically captures transmission data across multiple wavelengths, and the pre-built partial least squares model performs the analysis, eliminating manual chemical handling and improving ease of operation.
Solution Approach 2:
The patent creates a mathematical copy (partial least squares model) of the relationship between optical properties and fluid characteristics based on reference solutions. This model copy allows the system to predict properties without physically performing chemical analysis, thereby simplifying operations while maintaining precision.
3Measurement precision
If traditional analysis techniques are used, then comprehensive property measurement can be achieved, but productivity decreases due to slow analysis speed
Solution Approach 1:
The patent substitutes slow chemical analysis processes with rapid optical measurements. The optical sensor can capture transmission spectra quickly, and the partial least squares model provides immediate predictions, dramatically increasing analysis speed and productivity while preserving measurement precision.
Solution Approach 2:
The patent performs preliminary action by pre-calculating the partial least squares model during calibration. This allows the system to skip time-consuming computational steps during actual measurements, enabling rapid property determination that enhances productivity without sacrificing accuracy.
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 rapid, accurate determination of fluid characteristics, facilitating appropriate formulation of cleaning solutions for intended applications and ensuring effective cleaning and disinfecting properties.
Implementation Method 1
directing light into a fluid medium, detecting light at each of a plurality of wavelengths transmitted through the fluid medium
Data Source
AI summary
An optical sensor determines a characteristic of a fluid medium based on a plurality of detector outputs and a characteristic model. The optical sensor directs light into the fluid medium, detects light at each of a plurality of wavelengths transmitted through the fluid medium, and produces therefrom the plurality of detector outputs. The characteristic model provides an estimate of the characteristic of the fluid medium based on a partial least squares analysis of optical transmission measurements through at least one reference fluid medium having a known characteristic.