Air Temperature Correction via Water Content Sensing
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Solution Overview
Problem
Current air temperature measurement systems do not adequately correct for environmental effects, leading to reduced accuracy in air temperature and dependent parameters, resulting in sub-optimal engine settings and decreased aircraft range.
Innovation Solution
A system that includes a water content sensor and an air temperature sensor, with a correction module that uses correlation data to correct air temperature readings based on water content, and can also receive additional parameters like altitude and pressure values to enhance accuracy, and includes a heater controller to manage heating systems based on water content and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If air temperature measurements are not corrected for environmental effects, then the measurement system remains simple, but the accuracy of air temperature and dependent parameters is reduced
Solution Approach 1:
The measurement system is segmented into multiple independent sensors (water content sensor, AT sensor, pressure sensors) that each measure a specific parameter. This allows the system to maintain simplicity at the component level while achieving high accuracy through the combination of multiple measurements in the correction module.
Solution Approach 2:
The correction module acts as an intermediary that processes raw measurements from multiple sensors and applies environmental correction algorithms. This intermediary layer separates the simple sensor measurements from the complex correction calculations, maintaining sensor simplicity while improving overall accuracy.
2Loss of energy
If conventional air temperature measurement methods are used, then the system complexity remains low, but aircraft must operate with sub-optimal engine settings and increased fuel burn
Solution Approach 1:
The system continuously monitors water content and air temperature, then feeds this information back to the correction module which adjusts the temperature readings in real-time. This feedback loop ensures that engine settings are continuously optimized based on accurate environmental conditions, reducing fuel burn while maintaining measurement precision.
3Measurement precision
If air temperature measurements are not corrected, then the measurement system remains simple, but the range calculation margin is decreased
Solution Approach 1:
The system performs preliminary correction of air temperature measurements by continuously accounting for water content and environmental effects before these measurements are used in range calculations. This preliminary action ensures that downstream calculations start with already-corrected data, improving reliability without requiring complex real-time recalculations.
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 system provides more accurate air temperature values, improving aircraft efficiency by enabling optimal engine settings and reducing fuel burn, while also enhancing the reliability of airspeed calculations and navigation.
Implementation Method 1
a liquid water content (LWC) sensor configured to sense liquid water content (LWC) in the airflow
Implementation Method 2
an air temperature (AT) sensor configured to sense air temperature
Implementation Method 3
a heater system... configured to prevent condensation on the LWC sensor in cold and humid conditions
Data Source
AI summary
A system for correcting an air temperature (AT) reading can include a water content sensor configured to measure a water content in an airflow and to output a water content signal indicative thereof, an AT sensor configured to measure an air temperature and output an AT signal indicative thereof, and a correction module operatively connected to the water content sensor and the AT sensor. The correction module can be configured to receive the water content signal and the AT signal and to correct the AT signal based on the water content to output a corrected AT signal.