Icing Detection Using Differential Thermal Sensing
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Solution Overview
Problem
Existing methods for determining icing conditions rely on wind speed measurements, which are not always necessary or practical, and often require complex equipment and calibration.
Innovation Solution
An automated system using two sensing members, one in an ice-free state and the other exposed to potential ice accumulation, measures thermal state variables to determine icing conditions without requiring wind speed measurements, utilizing identical or differently sized sensing members and processing techniques to compare thermal responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wind speed measurement is used to determine icing conditions, then measurement precision can be improved, but device complexity increases due to requiring anemometer and complex calibration
Solution Approach 1:
The patent extracts the wind speed measurement requirement from the icing condition determination system. By using two sensing members where one is shielded from wind and the other is exposed, the system eliminates the need for separate wind speed measurement equipment (anemometer) while still being able to determine icing conditions through thermal state comparison.
Solution Approach 2:
The sensing members serve multiple functions: they act as both temperature sensors and wind speed indicators. The exposed sensing member's thermal response provides information about both temperature and wind conditions, while the shielded member provides pure temperature reference, eliminating the need for dedicated wind measurement equipment.
2Device complexity
If identical sensing members are used for comparison, then device complexity is reduced, but reliability decreases when environmental conditions vary
Solution Approach 1:
The patent applies different local qualities to the two sensing members: one is shielded from wind and precipitation while the other is fully exposed. This differential exposure creates distinct thermal characteristics that allow reliable icing condition determination even when environmental conditions vary, while keeping the members otherwise identical for simplicity.
3Ease of operation
If sensing members are exposed to identical conditions, then ease of operation is improved through simple comparison, but measurement precision decreases for detecting actual icing
Solution Approach 1:
Instead of exposing both sensing members to identical conditions and looking for differences, the patent inverts the approach by deliberately creating different exposure conditions (shielded vs. exposed). This allows the system to detect icing through the thermal state difference between the two members, maintaining simple processing while improving detection accuracy.
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
Enables accurate determination of icing conditions, including presence, intensity, and duration, without wind speed data, using simple or integrated processing methods, and can be applied to various environments and structures.
Implementation Method 1
measuring a test value of a variable indicative of the thermal state of the first sensing member; simultaneously to said measuring the test value, measuring a reference value of a variable indicative of the thermal state of the second sensing member
Data Source
AI summary
Methods and systems are described herein which allow to determine an icing condition without requiring a wind speed measurement. The methods and systems use two sensing members both being exposed to conditions in an environment. The determination is made based on a capacity of the sensing members to react differently to the conditions to which they are exposed. The conditions can be environmental or controlled. The determination includes measuring a variable indicative of the thermal state of each individual sensing member, and processing the measured values to generate the signal indicative of icing condition. The icing condition can be instrumental or meteorological.