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Method and apparatus for detecting the formation of ice on an aircraft

A technology for ice detection and aircraft, applied in the direction of measuring devices, deicing devices, electrical devices, etc., can solve problems such as false negative readings, and achieve the effect of reducing the possibility

Active Publication Date: 2017-12-05
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some existing systems and methods for detecting ice in real time are susceptible to false negative readings

Method used

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  • Method and apparatus for detecting the formation of ice on an aircraft
  • Method and apparatus for detecting the formation of ice on an aircraft
  • Method and apparatus for detecting the formation of ice on an aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0080] Ice detector

[0081] An ice detector according to one embodiment described in this disclosure is assembled as follows. First, obtain a commercial magnetostrictive ice detector. For example, the ice detector can be a Goodrich 0781LH1, Goodrich 0781ND, or a Meggitt / Vibro-Meter EW-140 ice detector. The ice detector includes an ultrasonic vibration probe. Secondly, if Figure 9 As shown, the LiTaO 3 The block is machined into a hollow shape, roughly conical or cylindrical cap shape. LiTaO 3 The cap has a maximum wall thickness of 0.05 inches, a height of 1.05 inches, and an outer diameter of 0.35 inches.

[0082] Before use, clean the LiTaO by placing the lid in an ultrasonic bath of toluene for 4 min 3 cover. After toluene sonication, the caps were placed in a water sonication bath for 4 minutes. Next, the lid was treated for 30 minutes in a plasma asher (34% Ar, 66% O 2 , 250 watts, 0.5mbar). Finally, place the cap in a desiccator for about 4 hours.

[0083] ...

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PUM

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Abstract

In one aspect, the disclosure describes methods and apparatus for detecting ice formation on an aircraft. In some embodiments, a method of detecting ice formation on an aircraft includes disposing an ice detector on an exterior surface of the aircraft, the ice detector including a probe surface and a layer of pyroelectric material disposed on at least a portion of the probe surface. The method further includes generating an electrical charge on a surface of the thermoelectric material layer of the ice detector to increase the local freezing point of water on the surface of the thermoelectric material layer.

Description

technical field [0001] The present disclosure relates to methods and apparatus for detecting the formation of ice on an aircraft, and in particular, to ice detectors that include pyroelectric materials. Background technique [0002] Ice accumulation on critical flight surfaces of aircraft presents a serious safety risk. Even small amounts of ice accumulating on some critical surfaces, such as aircraft wing leading edges and other airfoil surfaces, can seriously affect the lift and drag characteristics of the airfoil. Therefore, real-time detection of aircraft icing is an important factor for flight safety. However, some existing systems and methods of detecting ice in real time are susceptible to false negative readings. In such cases, the ice detection system incorrectly indicates that there is no ice accumulation on the aircraft, even though ice has in fact accumulated on one or more critical flight surfaces, when the aircraft is at temperatures near the freezing point o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D15/20
CPCB64D15/20G01K7/00G08B19/02G01K7/003G01K13/04
Inventor 查尔斯·S·迈斯托得·J·杰梅罗特
Owner THE BOEING CO