Aircraft pitot-static tube with ice detection

Details Aircraft pitot-static tube with ice detection Aircraft pitot-static tube with ice detection

2010-09-03

2011-11-15

Kundu, Sujoy (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Temperature measuring system

C702S003000, C702S024000, C702S054000, C702S057000, C702S059000, C702S075000, C702S130000, C073S024010, C073S024040, C073S170260, C340S582000, C340S962000

Reexamination Certificate

active

08060334

ABSTRACT:
An aircraft Ice Detection pitot-static tube is described which uses sensors integrated into the pitot-static tube to determine when and where the pitot-static tube is icing up. Temperature, thermal conductivity and impedance sensor measurements are combined with a mathematical transfer of the impedance sensor output into the complex dielectric plane to identify that the material accreating on the exterior and interior of the pitot-static tube is ice and only ice. Identification of ice realized when the trace in complex dielectric space has a distinctive semi-circular form, which only ice exhibits, with measured values in agreement with reference laboratory data stored in the onboard computer system.

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“Pitot-Static Tube-Prandtl Tube” http;//www.grc.nasa.gov/WWW/K-12/airplane/pilot.html.
“Air France Flight 447” http://en.wikipedia.org/wiki/Air France Flight 447.

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