Ion-Selective Electrode Circuit Simulation for Abnormality Diagnosis
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Solution Overview
Problem
Existing ion-selective electrode analyzing devices face errors due to bubble mixing, liquid vibration, and electrical noise, which are difficult to diagnose without prior knowledge of potential waveforms.
Innovation Solution
An analyzing device with a flow path, electrodes, liquid feeding mechanism, electric signal acquisition, and circuit simulation to estimate electrical state changes by simulating electric signals, allowing for abnormal cause identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional potential waveform analysis is used to diagnose abnormalities, then abnormal causes can be identified, but prior knowledge of potential waveforms is required and the method is complex
Solution Approach 1:
The patent creates an equivalent circuit model that copies the electrical characteristics of the ion-selective electrode system. By simulating this circuit model, the system can reproduce potential waveforms without requiring actual measurement data, enabling abnormal cause identification through comparison of simulated versus actual waveforms.
Solution Approach 2:
The patent changes the approach from analyzing raw potential waveforms directly to analyzing circuit parameters (resistance, capacitance, inductance) extracted from equivalent circuit models. This parameter transformation simplifies the diagnosis process by converting complex waveform analysis into simpler parameter comparison.
2Measurement precision
If measurement accuracy is increased to detect slight concentration changes, then clinical significance is improved, but measurement errors from bubbles, vibration, and noise increase
Solution Approach 1:
The patent introduces an equivalent circuit model as an intermediary between the physical measurement system and the analysis process. This model acts as a mediator that filters out harmful factors like bubbles and vibrations by representing the system's electrical characteristics in a controlled theoretical framework, allowing accurate concentration detection despite physical disturbances.
Solution Approach 2:
The patent implements a feedback mechanism where the simulated potential waveform from the equivalent circuit model is continuously compared with the actual measured waveform. Discrepancies between simulated and actual waveforms provide feedback about abnormal causes, enabling real-time correction and maintenance of measurement 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 accurate diagnosis of abnormal causes in ion-selective electrode devices, reducing measurement errors and maintenance downtime by identifying issues through circuit simulation.
Implementation Method 1
The activity (concentration) of a target ion is obtained by measuring a potential difference generated between the ion-selective electrode and the reference electrode
Implementation Method 2
a circuit simulator unit configured to simulate the electric signal on the basis of the model
Data Source
AI summary
A technique for specifying an abnormal cause without requiring information of a known potential waveform in an analyzing device using an ion-selective electrode is provided. The analyzing device analyzes characteristics of a liquid having conductivity and includes: a liquid flow path, an electrode in contact with the liquid in the flow path, a liquid feeding mechanism, an electric signal acquiring unit configured to acquire an electric signal output from the electrode, a storage unit configured to store a model in which the liquid in the flow path, the electrode, and the liquid feeding mechanism are expressed as an electric circuit, and a circuit simulator unit configured to simulate the electric signal on the basis of the model. The analyzing device estimates an electrical state change of the liquid in the flow path, the electrode, and the liquid feeding mechanism by simulating the electric signal in the circuit simulator unit.