Integrated Aircraft Ice Detector-Heater Unit for Leading-Edge Deicing
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Solution Overview
Problem
Existing ice protection systems for aircraft are inefficient and costly, and existing ice detectors are not integrated effectively with deicing systems, leading to potential flight disruptions and increased drag due to ice accumulation on leading surfaces.
Innovation Solution
An integrated ice detector and ice protection system that includes an electric resistance heater element layer, a sensing element, and multiple insulative layers, allowing for a single line replaceable unit that provides both ice detection and deicing functionality, using metallic or carbon nanotube elements for efficient ice prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate ice detectors and deicing systems are used, then detection accuracy is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines the ice detector and deicing system into a single integrated unit where the sensing element and heater element are positioned in close proximity within the same structural assembly. This merging allows both detection and deicing functions to be performed by one system, reducing overall complexity while maintaining detection accuracy through the specialized sensing element design.
Solution Approach 2:
The integrated unit serves multiple functions simultaneously: the sensing element detects ice accumulation, the heater element provides deicing capability, and both are housed within a unified structure that manages electrical connections and mechanical mounting. This multi-functionality reduces the number of separate components needed while preserving the precision of ice detection.
2Reliability
If separate ice detectors and deicing systems are used, then functional independence is improved, but maintenance cost and time increase
Solution Approach 1:
The patent designs the integrated unit as a modular line-replaceable unit that can be easily removed and replaced as a single assembly. This segmentation allows the entire integrated detector-deicing system to be replaced quickly without complex disassembly, reducing maintenance time and cost while maintaining functional independence through the self-contained design of each unit.
3Object-affected harmful factors
If traditional deicing systems are used, then ice protection is provided, but aerodynamic efficiency decreases due to drag
Solution Approach 1:
The patent positions the heater element and sensing element specifically on the leading edge surface where ice accumulation most critically affects aerodynamics. This localized approach provides ice protection precisely where needed while minimizing the overall surface area affected by heating, thereby reducing aerodynamic drag compared to full-surface heating systems.
Solution Approach 2:
The system applies heating only to the extent necessary to prevent or remove ice accumulation on the leading edge, rather than heating entire surfaces. The sensing element triggers the heater only when ice detection occurs, providing partial action that maintains aerodynamic efficiency while delivering adequate ice protection at the critical leading edge location.
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 integrated system efficiently detects and prevents ice accumulation on aircraft surfaces, maintaining aerodynamic efficiency and reducing the need for full surface replacement, while being cost-effective and aerodynamically compatible.
Implementation Method 1
electric resistance heater element layer... convert electrical energy to heat the leading-edge surfaces and shed ice by melting the ice at the ice-leading edge interface
Implementation Method 2
sensing element... allows for a single line replaceable unit that provides both ice detection and deicing functionality
Implementation Method 3
at least one second electrically insulative layer is positioned between the electric resistance heater element layer and the at least one first electrically insulative layer with the sensing element
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An integrated ice detector and ice protection system is provided. The integrated ice detector and ice protection system includes an electric resistance heater element layer (202, 302), a sensing element (204, 304), and at least one second electrically insulative layer positioned between the electric resistance heater element layer (202, 302) and the at least one first electrically insulative layer with the sensing element (204, 304). The sensing element (204, 304) is disposed in at least one first electrically insulative layer and wherein the sensing element (204, 304) is positioned outward from the electric resistance heater element layer (202, 302).