Sensor Head With Liquid Retaining Material for Electrochemical Calibration
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Solution Overview
Problem
Conventional electrochemical sensors require cumbersome calibration processes and can be prone to errors, with existing automatic calibration devices being large and costly.
Innovation Solution
A sensor head with a mounting surface, first and second electrodes, and a liquid retaining material impregnated with standard liquid, allowing for simple calibration by detecting potential differences or electric currents without manual operation, and enabling miniaturization and low-cost manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electrochemical sensors are used with manual calibration, then measurement accuracy can be maintained, but the calibration process becomes extremely cumbersome and error-prone
Solution Approach 1:
The sensor head automatically performs calibration by utilizing the liquid retaining material that maintains contact with the electrodes. The system self-calibrates through the inherent design where the liquid retaining material serves both as a seal and as a medium for automatic reference potential establishment, eliminating the need for manual calibration operations by the user.
Solution Approach 2:
The liquid retaining material is pre-loaded with reference liquid during manufacturing, and the sensor head is designed to automatically establish electrical contact between the electrodes and the reference liquid upon activation. This preliminary preparation enables automatic calibration without requiring user intervention to add reference liquid or perform calibration steps.
2Extent of automation
If automatic calibration devices with conduits and pumps are used, then calibration automation is achieved, but the device size increases and manufacturing cost rises
Solution Approach 1:
The invention extracts and eliminates the complex conduit and pump system from the sensor design. Instead of using mechanical fluid transport systems, the patent relies on the liquid retaining material to maintain direct contact with the electrodes, thereby achieving automation without the need for complex moving parts or fluid transport infrastructure.
Solution Approach 2:
The liquid retaining material serves multiple functions simultaneously: it acts as a seal to prevent contamination, maintains electrical contact between the electrodes and reference liquid, and provides the medium for automatic calibration. This merging of multiple functions into a single component simplifies the overall device structure while achieving automation.
3Measurement precision
If conventional calibration procedures with multiple standard solutions are used, then accurate calibration can be achieved, but the calibration time and user effort increase significantly
Solution Approach 1:
The liquid retaining material is designed to work with a single reference liquid that serves multiple calibration purposes. The universal design of the sensor head allows it to achieve accurate calibration using one standardized reference solution, eliminating the need for multiple standard solutions and the time-consuming process of switching between them.
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 and simplified calibration of electrochemical sensors, reducing user error and costs while allowing for miniaturization and efficient production.
Implementation Method 1
a liquid retaining material arranged on the mounting surface in a state where the liquid retaining material covers the first electrode and the second electrode integrally, wherein the liquid retaining material is impregnated with a standard liquid which is used as a reference in the electrochemical measurement
Implementation Method 2
a sensor head for performing electrochemical measurement, comprises: a mounting surface having insulation property; a first electrode and a second electrode arranged on the mounting surface in a spaced-apart manner from each other
Data Source
AI summary
There is provided a sensor head which includes a mounting surface having insulation property. A first electrode and a second electrode are arranged on the mounting surface in a spaced-apart manner from each other. A liquid retaining material is arranged on the mounting surface in a state where the liquid retaining material covers the first electrode and the second electrode integrally. The liquid retaining material is impregnated with a standard liquid which is used as a reference in the electrochemical measurement.