Sensor probe with anti-icing

Patent metadata

Field	Value
Publication number	US-2016377487-A1
Application number	US-201514753363-A
Country	US
Kind code	A1
Filing date	Jun 29, 2015
Priority date	Jun 29, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

Sensor probes with anti-icing and methods for manufacturing such sensor probes are disclosed. An exemplary sensor probe comprises a probe sensor, a probe body housing the probe sensor and an anti-icing device. The anti-icing device is bonded to and covers at least part of the probe body for preventing ice from forming on the probe body. The anti-icing device comprises a heating element thermally insulated from the probe body by a thermal insulator and a hydrophobic coating covering the heating element and defining an outer surface for exposure to an airflow. The heating element may be deposited using a direct write process.

First claim

What is claimed is:

1 . A sensor probe with anti-icing, the sensor probe comprising:
a probe sensor; a probe body housing the probe sensor and configured to extend into an airflow; and an anti-icing device bonded to and covering at least part of the probe body for preventing ice from forming on the probe body, the anti-icing device defining an outer surface for exposure to the airflow and comprising a heating element thermally insulated from the probe body.

2 . The sensor as defined in claim 1 , comprising a hydrophobic coating covering the heating element for being heated by the heating element, the hydrophobic coating defining the outer surface.

3 . The sensor probe as defined in claim 2 , wherein the hydrophobic coating is electrically insulated from the heating element.

4 . The sensor probe as defined in claim 1 , wherein the anti-icing device covers an upstream region of the probe body.

5 . The sensor probe as defined in claim 1 , wherein heating element is thermally insulated from the probe body by a polymeric material.

6 . The sensor probe as defined in claim 5 , wherein the heating element is disposed between the ceramic material and a polymeric material.

7 . The sensor probe as defined in claim 2 , wherein the hydrophobic coating is superhydrophobic.

8 . The sensor probe as defined in claim 1 , wherein the probe sensor is a temperature sensor.

9 . The sensor probe as defined in claim 1 , wherein the anti-icing device conforms to a shape of the probe body.

10 . The sensor probe as defined in claim 1 , comprising two heating elements arranged in two separate channels.

11 . The sensor probe as defined in claim 1 , wherein the anti-icing device comprises a temperature sensor.

12 . The sensor probe as defined in claim 2 , wherein the hydrophobic coating comprises a metallic material electrically insulated from the heating element.

13 . A temperature probe with anti-icing for extending into a gas path of a gas turbine engine, the temperature probe comprising:
a temperature sensor; a probe body housing the temperature sensor and configured to extend into the gas path of the gas turbine engine and be exposed to an airflow; and an anti-icing device bonded to and covering at least part of the probe body for preventing ice from forming on the probe body, the anti-icing device comprising:
a heating element thermally insulated from the probe body; and
a hydrophobic coating covering the heating element for being heated by the heating element, the hydrophobic coating being electrically insulated from the heating element and defining an outer surface for exposure to the airflow.

14 . The temperature probe as defined in claim 1 , wherein the heating element is disposed between a ceramic material and a polymeric material.

15 . A method of manufacturing an anti-icing device bonded to and covering at least part of a probe body of a sensor probe for extending into an airflow, the method comprising:
installing a heating element on the probe body and thermally insulating the heating element from the probe body; and covering the heating element with a coating defining an outer surface for exposure to the airflow.

16 . The method as defined in claim 15 , wherein the coating is hydrophobic.

17 . The method as defined in claim 15 , comprising depositing a thermally insulating material on the probe body before installing the heating element.

18 . The method as defined in claim 15 , wherein installing the heating element comprises depositing the heating element using a direct write process.

19 . The method as defined in claim 15 , comprising installing a temperature sensor of the anti-icing device before covering the heating element with the coating.

20 . The method as defined in claim 15 , comprising electrically insulating the coating from the heating element.

Assignees

• Pratt & Whitney Canada

Inventors

• Cheung Kin-Leung
• Lance Peter

Classifications

• G01K1/20 Primary

  Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature · CPC title

• H05B3/18

  the conductor being embedded in an insulating material · CPC title

• G01K1/08 Primary

  Protective devices, e.g. casings · CPC title

• G01K13/00

  Thermometers specially adapted for specific purposes · CPC title

• H05B2203/003

  using serpentine layout · CPC title