Impedance Measuring Device with Automatic Frequency Control
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Solution Overview
Problem
Conventional impedance measuring devices for biological samples require lengthy setup adjustments to enhance measurement precision, which hinders rapid measurement according to the sample type and analysis objective.
Innovation Solution
An impedance measuring device with a biological sample holding unit, an applying unit for AC voltage, a measuring unit, and a measurement condition control unit that automatically adjusts frequency based on the sample condition, including a blood condition analyzing unit, temperature control, and optional units for sample and drug supply, precision management, and stirring mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement conditions are manually set for each biological sample type and analysis objective, then measurement precision is improved, but setup time increases significantly
Solution Approach 1:
The system automatically identifies the biological sample type and selects appropriate measurement conditions without user intervention. The measurement condition control unit autonomously adjusts measuring frequency based on sample characteristics, eliminating manual setup while maintaining precision.
Solution Approach 2:
The system dynamically changes measurement parameters (specifically measuring frequency) based on detected sample conditions. Different biological samples trigger different frequency settings automatically, optimizing measurement precision for each sample type without requiring manual parameter adjustment.
2Measurement precision
If measurement conditions are optimized for each sample type, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
A single measurement condition control unit handles multiple functions: sample type identification, condition selection, and parameter adjustment. This universal controller manages different biological sample types and their respective optimal conditions without requiring separate specialized systems for each function.
Solution Approach 2:
The system uses feedback from sample identification to automatically adjust measurement conditions. The measurement condition control unit receives information about sample type and objectively, then selects and applies the appropriate measurement conditions, creating a closed-loop system that simplifies control while maintaining precision.
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 rapid improvement in measurement precision by automatically controlling measuring frequency and analyzing blood condition changes, reducing setup time and enhancing measurement accuracy.
Implementation Method 1
an applying unit configured to apply an AC voltage to a pair of electrodes in contact with the biological sample held by the biological sample holding unit
Implementation Method 2
a measuring unit configured to measure an impedance of the biological sample obtained by an AC voltage being applied to the biological sample by the applying unit
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is an impedance measuring device for biological samples including one or a plurality of biological sample holding units configured to hold a biological sample, an applying unit configured to apply an AC voltage to a pair of electrodes in contact with the biological sample held by the biological sample holding unit, a measuring unit configured to measure an impedance of the biological sample obtained by an AC voltage being applied to the biological sample by the applying unit, and a measurement condition control unit configured to control a measuring time and/or a measuring frequency in the measuring unit.