Aircraft P-Static Sensor with Corona Guard and Heating Element
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Solution Overview
Problem
Existing p-static sensors on aircraft are not capable of measuring precipitation static charge to the higher performance standards required by regulatory authorities, especially for composite aircraft, and lack the ability to be permanently installed for monitoring and controlling onboard flight systems.
Innovation Solution
A p-static sensor device with a corona guard is designed to measure static charge accumulation on aircraft surfaces, featuring a conductive layer sandwiched between dielectric layers, which can be permanently installed at various locations, including within fuel tanks, and includes a heating element to prevent ice buildup, while the corona guard reduces radio frequency interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing p-static sensors are used for measuring charge build up, then basic measurement capability is provided, but measurement precision and reliability do not meet higher performance standards required by regulatory authorities
Solution Approach 1:
The patent modifies the sensor design parameters by introducing a corona guard structure with specific geometric configurations and material properties. This changes the electrical field distribution parameters around the sensor, reducing corona discharge effects and improving measurement precision to meet higher regulatory standards while enhancing reliability
Solution Approach 2:
The sensor employs composite material construction with multiple dielectric layers and conductive materials. This composite structure optimizes the sensor's electrical characteristics, improving both measurement precision and reliability by reducing interference and enhancing signal detection capability
2Adaptability or versatility
If p-static sensors are installed for regulatory compliance testing, then charge measurement capability is provided, but the sensors cannot be permanently installed for continuous monitoring of onboard flight systems
Solution Approach 1:
The patent designs the p-static sensor with universal mounting capabilities that enable both temporary installation for regulatory compliance testing and permanent installation for continuous monitoring. The sensor incorporates standardized mounting interfaces and power connections that facilitate easy deployment in multiple operational contexts, enhancing adaptability without compromising ease of operation
3Measurement precision
If sensors operate in cold environments, then charge measurement is possible, but ice build-up on the sensor surface degrades measurement accuracy
Solution Approach 1:
The patent incorporates a heating element that activates before ice accumulation can significantly degrade measurements. This preliminary heating action maintains the sensor surface temperature above freezing, preventing ice build-up and preserving measurement precision in cold environmental conditions
4Measurement precision
If corona discharge occurs from the sensor, then charge detection is enabled, but radio frequency interference is generated that disrupts communication
Solution Approach 1:
The patent introduces a corona guard structure that acts as an intermediary between the sensor's electric field and the surrounding environment. This guard structure controls and limits corona discharge, allowing necessary charge detection while reducing radio frequency interference to acceptable levels, thus protecting communication systems
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 provides accurate and reliable measurement of p-static charge, enabling regulatory compliance and real-time monitoring and control of onboard systems, reducing radio frequency interference and ice buildup issues.
Implementation Method 1
a corona guard for guarding against corona discharge from the sensor
Implementation Method 2
Means may be provided for heating the sensor device to avoid ice build-up
Implementation Method 3
an aircraft may be subject to the impingement of particles on its various external surfaces, which leave an electrical charge on the aircraft due to either a triboelectric process or charged particle interactions
Data Source
AI summary
A device senses a static charge resulting from the impingement of particles on a surface, such as an aircraft's outer skin. The device includes a sensor adapted to be installed on the surface and a corona guard for guarding against corona discharge from the sensor.