Liquid Analyzer Resistance Measurement Immersed Sensor
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Solution Overview
Problem
Existing liquid analyzers require significant time and effort to determine sensor integrity, especially when immersed in flowing analysis target liquids, leading to reduced reliability and accuracy over time.
Innovation Solution
A liquid analyzer with a resistance measurement mechanism that applies DC voltage to the responsive membrane while immersed in the analysis target liquid, allowing for real-time resistance measurement and automatic discharge to prevent polarization, enabling quick sensor integrity checks without removing the sensor from the liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is pulled up from the analysis target liquid to measure resistance using electrolyte liquid, then the resistance of the responsive membrane can be accurately measured, but significant time and effort are required and the sensor must be returned to the analysis target liquid
Solution Approach 1:
The analysis target liquid serves dual purposes: it is both the medium for analyzing the component concentration and the electrolyte for measuring the responsive membrane resistance. This eliminates the need for separate electrolyte liquid and manual sensor removal, allowing continuous in-situ resistance measurement while maintaining measurement accuracy.
2Measurement precision
If DC voltage is applied to the responsive membrane to measure resistance, then high membrane resistance can be measured accurately, but polarization occurs that may affect analysis accuracy
Solution Approach 1:
The resistance measurement mechanism operates periodically by alternating between analysis mode and resistance measurement mode. During resistance measurement, DC voltage is applied to measure membrane resistance. After measurement, the control part waits for a predetermined time to allow polarization to subside before resuming analysis mode, ensuring analysis accuracy is not compromised by residual polarization effects.
3Productivity
If the sensor remains immersed in the flowing analysis target liquid, then continuous analysis can be performed, but determining sensor integrity becomes complex and time-consuming
Solution Approach 1:
The resistance measurement function is integrated directly into the sensor while it remains immersed in the analysis target liquid. The control part automatically controls the resistance measurement mechanism to apply DC voltage and measure membrane resistance without requiring sensor removal or external electrolyte liquids, simplifying the integrity determination process while maintaining continuous operation capability.
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
This configuration reduces the time and effort required to determine sensor integrity, maintains analysis reliability, and prevents polarization during analysis, ensuring accurate and continuous measurement even with high membrane resistances.
Implementation Method 1
a resistance measurement mechanism adapted to, in the state where the responsive membrane is immersed in the flowing analysis target liquid, apply DC voltage to the responsive membrane to measure the resistance of the responsive membrane
Implementation Method 2
a sensor adapted to, in a state where a responsive membrane is immersed in the flowing analysis target liquid, sense a predetermined component contained in the analysis target liquid; an analysis mechanism adapted to analyze the analysis target liquid with use of voltage generated in the sensor
Data Source
AI summary
A liquid analyzer is one that performs analysis in a state of being immersed in a flowing analysis target liquid, and in order to simply make a good/bad determination and increase reliability, includes: a sensor adapted to, in a state where a responsive membrane is immersed in the flowing analysis target liquid, sense a predetermined component contained in the analysis target liquid; an analysis mechanism adapted to analyze the analysis target liquid with use of voltage generated in the sensor; and a resistance measurement mechanism adapted to, in the state where the responsive membrane is immersed in the flowing analysis target liquid, apply DC voltage to the responsive membrane to measure the resistance of the responsive membrane.