Rheometer-Based 0 Hz Permittivity Measurement Across Material States
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Solution Overview
Problem
Existing methods for measuring electric permittivity at 0 Hz are inaccurate, unreliable, and limited to a single state of aggregation, with long measurement timelines and difficulty in controlling temperature, preventing effective measurement across solid, liquid, and aeriform states.
Innovation Solution
A measurement method and system using a rheometer with an electrorheology module, comprising parallel plates and a force sensor, to determine permittivity by measuring normal force under a DC electric field, allowing fast and accurate permittivity measurement across different states with temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parallel flat-plate capacitors are used to measure DC permittivity, then the measurement can be performed, but the accuracy and reliability of the detected quantities are low
Solution Approach 1:
The patent replaces the traditional electrical measurement approach with a rheological measurement system. Instead of using standard electrical instruments to measure permittivity directly, the system uses a rheometer to measure rheological properties, substituting the measurement domain from electrical to mechanical/rheological to achieve more accurate and reliable results.
Solution Approach 2:
The patent introduces an intermediary substance (a known permittivity material) between the sample and the electrode. This intermediary layer serves as a mediator that enables indirect measurement of the sample's permittivity through rheological measurements, improving both accuracy and reliability by eliminating direct electrical contact issues.
2Productivity
If flat-plate capacitor method is used, then DC permittivity can be measured, but the measurement time is long
Solution Approach 1:
By substituting electrical measurement systems with a rheological measurement system, the patent enables faster measurement times. The rheometer-based approach allows for rapid acquisition of permittivity data without the lengthy measurement processes required by traditional electrical instruments.
3Temperature
If traditional measurement systems are used, then permittivity can be measured, but temperature control is difficult
Solution Approach 1:
The patent utilizes a rheometer, which is originally designed for measuring rheological properties, to also measure electrical permittivity. This multi-functional approach allows the system to provide temperature control capabilities inherent in rheological measurements while simultaneously obtaining permittivity data, avoiding the need for separate temperature control systems.
4Adaptability or versatility
If dedicated setups are used for single state of aggregation, then measurements can be performed, but a single instrumentation architecture cannot measure different states
Solution Approach 1:
The patent creates a universal measurement architecture based on rheological principles that can accommodate substances in different states of aggregation (solid, liquid, gas). The rheometer-based system provides a single instrumentation framework that adapts to measure permittivity across various states without requiring separate dedicated setups for each state.
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 reliable, fast, and non-destructive measurement of permittivity in various states with reduced measurement time and improved accuracy, while also evaluating polarization and conductivity characteristics.
Implementation Method 1
imposing a potential difference at 0 Hz between said first plate and said second plate
Implementation Method 2
determine the electric permittivity of a substance at 0 Hz
Implementation Method 3
measuring, by means of the force sensor, a normal force to which said second plate is subjected
Data Source
AI summary
A measurement method (100) of the electric permittivity (ε) at 0 Hz of a substance (1), irrespective of the aggregation state, comprising the steps of: pre-arranging (101) a rheometer (2) comprising an electrorheology module (20), provided with a fixed first plate (21) and said movable second plate (22); connecting (102) a voltage generator (3) to said rheometer (2); placing (103) the substance (1) between said first plate (21) and said second plate (22); arranging (104) said second plate (22) at a distance (D) from said first plate (21); imposing (105) said potential difference (ΔV) at 0 Hz between said first plate (21) and said second plate (22); measuring (106) a normal force (F) to which said second plate (22) is subjected; converting (108) the normal force (F) to obtain the dielectric permittivity (ε) of the substance (1).