Pitot Tube Heating Control for Icing Protection Without Overheating
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Solution Overview
Problem
The existing pitot tubes with internal heating elements for aircraft are prone to high failure rates and safety hazards due to excessive heat in warm environments, leading to increased maintenance times and operational risks.
Innovation Solution
A power management system that monitors and controls the power applied to the heating elements in pitot tubes, using a voltage regulator, fault-tolerant design, and intelligent control components to optimize heating and de-heating based on temperature and fault conditions, ensuring reliable operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating elements with fixed resistance are used in pitot tubes to prevent icing, then resistance to icing is improved, but the tube temperature becomes excessively high in warm environments, leading to increased failure rate and safety hazards
Solution Approach 1:
The patent applies dynamics by transitioning from fixed resistance heating elements to variable resistance heating elements that can dynamically adjust their heating output based on environmental conditions. The system monitors temperature and automatically modulates the heating element resistance to provide optimal heating only when needed, preventing both icing and overheating
Solution Approach 2:
The patent implements parameter changes by modifying the electrical resistance parameter of the heating element from a fixed value to a variable value that can be adjusted in response to temperature conditions. This allows the system to adapt its heating characteristics to match environmental requirements, reducing failure rates and safety hazards
2Reliability
If heating elements are continuously energized to prevent icing, then protection against ice obstruction is improved, but the operational lifetime of pitot tubes is reduced due to excessive heat and increased failure rate
Solution Approach 1:
The patent applies periodic action by implementing intermittent heating cycles rather than continuous heating. The system periodically monitors temperature conditions and activates heating elements only when icing conditions are detected or anticipated, allowing the pitot tube to cool down during non-icing periods, thereby extending operational lifetime while maintaining protection against ice obstruction
3Object-affected harmful factors
If pitot tubes are replaced frequently due to high failure rate, then safety of personnel is maintained, but maintenance time and operational downtime increase substantially
Solution Approach 1:
The patent implements self-service by enabling the pitot tube heating system to automatically monitor its own temperature conditions and self-regulate heating output without external intervention. The system includes temperature sensors and control circuitry that automatically adjust heating elements based on detected conditions, reducing the need for manual maintenance and extending the interval between maintenance operations
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 enhances the operational lifetime of pitot tubes, reduces maintenance times, and ensures personnel safety by intelligently managing the heating elements, thereby preventing icing and reducing the risk of overheating.
Implementation Method 1
pitot tubes with internal heating elements have been employed
Implementation Method 2
a temperature sensor integrated within the pitot tube 102
Data Source
AI summary
A system, power management system and method are disclosed. The power management system includes a pitot tube, one or more heating elements disposed in the pitot tube, and one or more power switches, wherein each power switch of the one or more power switches is coupled to a respective heating element and configured to energize or de-energize the respective heating element in response to a control signal. The power management system also includes a temperature detector coupled to the pitot tube and configured to determine a temperature of the pitot tube, and a processor complex coupled to the one or more power switches and the temperature detector and configured to output the control signal to energize or de-energize at least one of the heating elements through a respective at least one of the respective one or more power switches in response to at least the determined temperature of the pitot tube or a detection of a fault.