AC Resistance Sensing for Non-Magnetic Conductive Impurity Detection
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Solution Overview
Problem
Existing methods for detecting conductive impurities in solid-liquid mixtures, such as those used in electronic devices, are inadequate for non-magnetic materials, leading to insufficient detection rates and potential device failures.
Innovation Solution
An impurity detection support device and method that applies an AC voltage or superimposes an AC current between electrodes in a pipe to measure resistance, using the calculated resistance as an indicator for the presence of conductive impurities, regardless of their magnetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic detection method is used to detect conductive impurities, then magnetic impurities can be detected, but non-magnetic conductive impurities cannot be detected
Solution Approach 1:
The patent replaces the magnetic detection method with an electrical resistance measurement method. Instead of using magnetic fields to detect impurities, the invention applies AC voltage between electrodes and measures the resulting current to calculate resistance, thereby detecting both magnetic and non-magnetic conductive impurities through their electrical conductivity properties.
Solution Approach 2:
The patent changes the detection parameter from magnetic properties to electrical resistance. By measuring the resistance of the liquid under test using AC voltage and current measurements between electrodes, the system can detect conductive impurities regardless of their magnetic characteristics, thus improving both detection rate and adaptability.
2Measurement precision
If DC voltage is applied to measure resistance, then conductive impurities can be detected, but electrode polarization and instability occur
Solution Approach 1:
The patent employs AC voltage instead of DC voltage to apply periodic electrical stimulation between the electrodes. This periodic action prevents electrode polarization and maintains electrode stability in the liquid, while still enabling accurate resistance measurement through the periodic current response.
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
Enhances the detection rate of conductive impurities by providing a reliable and efficient method that can be integrated into existing manufacturing processes, reducing the risk of device failures by detecting non-magnetic impurities effectively.
Implementation Method 1
a first electrode 114 and a second electrode 116 provided in the pipe 102, the first electrode 114 and the second electrode 116 being arranged such that an AC voltage is adapted to be applied to or an AC current is adapted to be superimposed on the liquid under test in a space extending between a first position of the pipe 102 and a second position shifted from the first position in a direction of extension of the pipe 102
Data Source
AI summary
An impurity detection support device includes: a pipe in which a liquid under test flows; a first electrode and a second electrode provided in the pipe, the first electrode and the second electrode being arranged such that an AC voltage is adapted to be applied to or an AC current is adapted to be superimposed on the liquid under test in a space extending between a first position and a second position; a power supply unit that applies an AC voltage or superimposes an AC current between a pair of electrodes; a measurement unit that measures a current or a voltage generated between the pair of electrodes; and a calculation unit that calculates a resistance of the liquid under test using a measurement result of the measurement unit.