Phase Adjustment Circuit Admittance Control for Capacitance Measurement
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Solution Overview
Problem
Existing electrostatic capacitance measuring devices face challenges in accurately adjusting voltage signals due to temperature fluctuations, leading to inconsistencies in measurement accuracy.
Innovation Solution
A measuring device comprising a base board, sensor electrode, temperature sensor, radio frequency oscillator, C/V conversion circuit, and phase adjustment circuit, which acquires and adjusts parameters to stabilize voltage signals by using pre-stored and corrected parameter groups based on temperature data, ensuring accurate electrostatic capacitance measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature compensation parameters are pre-stored for multiple temperatures, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent pre-stores correction parameter groups for multiple temperatures in advance. During measurement, the system only needs to read the appropriate pre-prepared parameter group based on the current temperature, avoiding complex real-time calculations and simplifying the measurement process while maintaining high accuracy.
Solution Approach 2:
The patent uses temperature as a key parameter to select different correction parameter groups. By changing the temperature parameter, the system automatically switches to the corresponding pre-stored correction parameters, enabling adaptive compensation without complex control logic.
2Stability of the object's composition
If correction parameter groups are created for multiple temperatures, then stability under temperature variations is improved, but data processing complexity increases
Solution Approach 1:
Correction parameter groups for multiple temperatures are prepared in advance through preliminary calibration. This allows the system to quickly switch between pre-validated parameter sets based on temperature, ensuring signal stability without requiring complex real-time parameter generation or management.
3Reliability
If admittance of phase adjustment circuit is adjusted based on temperature, then measurement reliability is improved, but adjustment complexity increases
Solution Approach 1:
The system automatically selects and applies the appropriate correction parameter group based on the detected temperature, without requiring manual intervention. The temperature sensor continuously monitors and triggers automatic parameter switching, making the adjustment process self-service and eliminating manual complexity while maintaining high reliability.
Solution Approach 2:
The system uses temperature sensor feedback to automatically adjust the correction parameters. The temperature detection result feeds back to the parameter selection logic, which then applies the appropriate correction parameter group, creating a closed-loop system that maintains measurement reliability through automatic adaptation.
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
The solution effectively stabilizes voltage signals and enhances measurement accuracy by adjusting admittance of the phase adjustment circuit, accounting for temperature variations and environmental conditions, thereby improving the reliability of electrostatic capacitance measurements.
Implementation Method 1
a temperature sensor, provided on the base board
Implementation Method 2
a C/V conversion circuit, which generates a voltage signal according to electrostatic capacitance formed by the sensor electrode
Implementation Method 3
a phase adjustment circuit, connected between the sensor electrode and the radio frequency oscillator
Data Source
AI summary
A measuring method according to an exemplary embodiment includes acquiring a temperature by a temperature sensor at a first time, and acquiring a first parameter that sets an admittance of a phase adjustment circuit. The measuring method includes acquiring a second parameter corresponding to the temperature acquired at the first time. The second parameter is generated based on a second parameter group that is pre-stored. The measuring method includes acquiring a correction parameter group by correcting a second parameter group to correspond to the first parameter based on the first parameter and the second parameter.