Fluid Analysis Cartridge Reference Well Thickness Compensation
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Solution Overview
Problem
In the production of fluid analysis cartridges, variations in well thickness due to environmental and operational differences lead to inconsistent light absorbance, affecting the accuracy of fluid sample analysis, especially when bulk cartridges are manufactured.
Innovation Solution
Incorporating a reference well with a macromolecular coloring reagent that varies in optical characteristics with thickness, allowing the fluid analysis apparatus to estimate the thickness of the test wells and correct for absorbance variations, using a tag for component and concentration information to calibrate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bulk fluid analysis cartridges are manufactured with standardized wells, then production efficiency is improved, but well thickness variations occur due to environmental and operational differences, leading to inconsistent light absorbance
Solution Approach 1:
A reference well is introduced as an intermediary element that does not directly participate in the test reaction but serves as a thickness reference. This reference well contains a macromolecular coloring reagent whose absorbance correlates with well thickness, allowing the system to measure and compensate for thickness variations without affecting the actual test wells' function or production process
Solution Approach 2:
The system implements feedback by measuring the absorbance of the reference well to determine well thickness, then using this thickness information to correct the absorbance measurements of the test wells. This closed-loop approach compensates for manufacturing variations automatically, maintaining measurement accuracy despite bulk production inconsistencies
2Measurement precision
If a reference well with macromolecular coloring reagent is added to measure thickness, then thickness measurement capability is improved, but device complexity increases
Solution Approach 1:
The reference well serves multiple functions: it acts as a thickness indicator, provides a calibration reference, and enables automatic compensation for manufacturing variations. By consolidating these functions into a single well structure containing a specially formulated macromolecular coloring reagent, the design avoids adding separate measurement devices or complex calibration mechanisms
Solution Approach 2:
The macromolecular coloring reagent is designed with specific properties where its absorbance characteristics change predictably with well thickness. This parameter change relationship allows the reference well to encode thickness information in its optical properties, enabling thickness measurement through simple absorbance reading without requiring physical thickness sensors or complex measurement apparatus
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
Ensures consistent and accurate analysis of fluid samples by accounting for well thickness variations, improving the reliability of fluid analysis results across multiple cartridges.
Implementation Method 1
a macromolecular coloring reagent having an optical characteristic that varies according to a thickness of the reference well
Implementation Method 2
a test reagent having an optical characteristic that varies according to a concentration of a component of a fluid sample that reacts with the test reagent and a thickness of the test well
Data Source
AI summary
A fluid analysis cartridge includes a reference well including a macromolecular coloring reagent having an optical characteristic that varies according to a thickness of the reference well, and a test well including a test reagent having an optical characteristic that varies according to a concentration of a component of a fluid sample that reacts with the test reagent and a thickness of the test well.