Ferroelectric Sensor Temperature Determination via Coercive Field Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ferroelectric sensors experience undesirable temperature measurement errors due to small changes in polarization state for given temperature changes, making existing methods inaccurate for temperature determination.
Innovation Solution
The method involves applying a symmetrical periodic voltage waveform to a ferroelectric sensor to induce it to traverse a polarization versus voltage hysteresis loop, monitoring voltages and polarization states to determine the coercive field voltage, which is then used to calculate the temperature of the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If polarization state change is used to determine temperature change, then temperature measurement is enabled, but measurement precision deteriorates due to small polarization state changes for given temperature changes
Solution Approach 1:
The patent changes the measurement parameter from polarization state directly to coercive field voltage. By applying a periodic voltage waveform and measuring the voltage at which polarization switches (coercive field), the system obtains a measurement that exhibits larger changes for given temperature variations, thereby improving temperature measurement precision without losing information about temperature changes.
2Measurement precision
If coercive field voltage is used to determine temperature, then measurement precision improves, but device complexity increases due to additional voltage application and monitoring requirements
Solution Approach 1:
The patent applies a periodic voltage waveform to the ferroelectric sensor to induce repeated polarization switching. This periodic action allows the system to track the coercive field voltage over multiple cycles, improving measurement reliability and precision while managing device complexity through a systematic, repeatable measurement process.
Solution Approach 2:
The system monitors the voltage across the ferroelectric sensor during polarization switching and uses this feedback information to determine the coercive field voltage. By implementing feedback monitoring of the voltage waveform and polarization state transitions, the system achieves precise temperature measurement through coercive field detection while maintaining manageable device complexity.
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
This approach provides a more accurate temperature measurement by utilizing the coercive field voltage, improving the precision of temperature determination in ferroelectric sensors.
Implementation Method 1
The ferroelectric sensor has operational characteristics defined by a polarization versus voltage hysteresis loop
Implementation Method 2
During operation, a change in a polarization state of a ferroelectric sensor has been utilized to determine a temperature change in the ferroelectric sensor
Data Source
AI summary
Systems and methods for determining a temperature of a ferroelectric sensor are provided. The ferroelectric sensor has operational characteristics defined by a polarization versus voltage hysteresis loop. In one exemplary embodiment, the method includes applying a symmetrical periodic voltage waveform to the ferroelectric sensor so as to induce the ferroelectric sensor to traverse the polarization versus voltage hysteresis loop. The method further includes monitoring voltages across the ferroelectric sensor and polarization states of the ferroelectric sensor over a first time interval to determine a first zero field polarization state and a first coercive field voltage. The method further includes determining a first temperature value indicative of the temperature of the ferroelectric sensor based on the first coercive field voltage.