Fluid Sensing System for Substance Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Substrate contamination in substance detection devices occurs due to premature exposure to analytes, leading to inaccurate test results and increased chances of contamination when waiting for fluid evaporation, which is difficult to determine visually.
Innovation Solution
A closed-loop fluid sensing system that continuously monitors the presence and level of fluid in the device's chamber, using sensors to determine when the fluid has fully evaporated, allowing for precise control of heating to accelerate evaporation and initiate substance detection processes, thereby reducing contamination and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device waits for fluid evaporation before substance detection, then substrate contamination is reduced, but detection time increases and accuracy decreases due to extended exposure to environment
Solution Approach 1:
The patent implements a feedback mechanism where the sensor continuously monitors fluid presence in the chamber and provides real-time information to the controller. When the sensor detects that fluid has evaporated, it triggers the substance detection process automatically. This closed-loop feedback system eliminates the need for visual monitoring and ensures detection occurs at the optimal moment, resolving the contradiction between waiting time and detection accuracy.
Solution Approach 2:
The patent replaces the manual visual monitoring method with an automated sensor-based detection system. The sensor electronically detects fluid presence and triggers the detection process, substituting the mechanical/visual observation process with an automated electronic system. This substitution eliminates human error and timing inconsistencies, improving both accuracy and efficiency.
2Measurement precision
If visual monitoring is used to determine fluid evaporation, then device complexity is reduced, but measurement precision deteriorates due to difficulty in determining complete evaporation
Solution Approach 1:
The patent replaces visual monitoring with an electronic sensor that automatically detects fluid presence. The sensor provides precise, objective measurements of fluid evaporation status, eliminating the imprecision of visual assessment. This substitution introduces a simple electronic component that significantly improves measurement precision without adding substantial complexity to the overall device.
Solution Approach 2:
The sensor system is designed to autonomously detect fluid evaporation and trigger the detection process without requiring external intervention or complex control mechanisms. The system serves itself by automatically monitoring and responding to fluid presence, simplifying the overall control architecture while maintaining high measurement precision.
3Adaptability or versatility
If the substrate is exposed to environment for extended periods, then device operation flexibility is improved, but substrate contamination increases leading to inaccurate results
Solution Approach 1:
The patent implements preliminary action by having the sensor continuously monitor fluid presence and automatically triggering the substance detection process the moment evaporation is detected. This ensures the substrate is exposed to the environment only for the minimum necessary time, preventing contamination while maintaining operational flexibility. The system is prepared and ready to detect immediately when conditions are optimal.
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 accurate and timely substance detection by preventing substrate contamination and optimizing the evaporation process, reducing the risk of inaccurate results and device exposure to the environment.
Implementation Method 1
The device includes a heater positioned within the chamber. The heater is to heat at least a portion of the substance to ready the device for analysis.
Implementation Method 2
After the fluid has evaporated from the chamber, the device can be tested for the presence of the substance.
Implementation Method 3
A sensing capacitor is arranged in the chamber that measures impedance and/or capacitance of the solution or chemical added to the chamber
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
In an example implementation, a substance detection method includes sensing for fluid in a chamber of a substance detection device. When fluid is sensed in the chamber, the method includes sensing again for fluid in the chamber. When no fluid is sensed in the chamber, the method includes initiating a substance detection process.