Icing resistant sensor port for a fuel tank environment

• US 8,117,909 B1
• Filed: 04/08/2008
• Issued: 02/21/2012
• Est. Priority Date: 04/08/2008
• Status: Active Grant

• Current Assignee: Simmonds Precision Products, Inc. (Rtx Corporation)
• Original Assignee: Simmonds Precision Products, Inc. (Rtx Corporation)
• Inventors: LaClair, Robert Downing, Zeliff, Robert L.
• Primary Examiner(s): Williams, Hezron E
• Assistant Examiner(s): Redmann, Gregory J
• Application Number:
  US12/080,991
• Time in Patent Office: 1,414 Days
• Field of Search: 734/321, 731/702.6
• US Class Current: 73/170.26
• CPC Class Codes: B64D 37/005 Accessories not provided for in the groups B64D37/02 - B64D37/28
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01L 19/0007 Fluidic connecting means
• CPC Class Codes: G01L 19/06 Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa

Abstract

A system for an icing resistant sensor port assembly includes shaped and patterned features for resisting the formation and propagation of ice around a sensor port, such as for a pressure sensor in an aircraft fuel tank. Water may be present in fuel tanks due to condensation and other factors. The water, being heavier than fuel, such as jet fuel, sinks to the bottom of the tank and may be present around the sensor port. If the water completely fills the pressure port, it may damage the sensor. In various embodiments, an inlet assembly having a cone-shaped countersink, sharp edges that reduce surface area, anti-wetting coatings, and slots to allow fluid flow within the inlet assembly, among other features, may be used to help resist ice formation and propagation around a sensor port.

Claims

1. A sensor port device for resisting formation and propagation of ice around a sensor port, comprising:

an inlet assembly having a shaped volume that resists ice plug formation, wherein a shape of the shaped volume causes application of a force vector component to ice that forms within the shaped volume to eject the ice away from the inlet assembly;

a plurality of edges disposed on the inlet assembly, wherein the edges have small surface areas that resist ice formation; and

a plurality of openings disposed in the inlet assembly that provide for fluid flow across the shaped volume of the inlet assembly, wherein the fluid flow provided by the plurality of openings causes removal of the ice ejected by the shaped volume.

2. The sensor port device according to claim 1, wherein the shaped volume is a cone shape.

3. The sensor port device according to claim 1, further comprising:

an anti-wetting film that is disposed on at least one surface of the inlet assembly.

4. The sensor port device according to claim 3, wherein the anti-wetting film is disposed over all surfaces of the inlet assembly.

5. The sensor port device according to claim 1, further comprising:

a screen disposed in the inlet assembly over the sensor port.

6. The sensor port device according to claim 1, wherein the plurality of openings include pairs of openings disposed across the inlet assembly from one another that enables the fluid flow across the shaped volume to remove the ice ejected from the shaped volume.

7. The sensor port device according to claim 1, further comprising:

a base assembly coupled to the inlet assembly that attaches the inlet assembly over the sensor port.

8. The sensor port device according to claim 1, wherein the sensor port is a port of a pressure sensor.

9. A method of resisting formation and propagation of ice around a sensor port, comprising:

disposing an inlet assembly over the sensor port, wherein the inlet assembly has a shaped volume that resists ice plug formation, wherein a shape of the shaped volume causes application of a force vector component to ice that forms within the shaped volume to eject the ice away from the inlet assembly;

disposing a plurality of edges on the inlet assembly, wherein the edges have small surface areas that resist ice formation; and

disposing a plurality of openings in the inlet assembly that provide for fluid flow across the shaped volume of the inlet assembly, wherein the fluid flow provided by the plurality of openings causes removal of the ice ejected by the shaped volume.

10. The method according to claim 9, wherein the shaped volume is a cone shape.

11. The method according to claim 9, further comprising:

applying an anti-wetting film on at least one surface of the inlet assembly.

12. The method according to claim 11, wherein the anti-wetting film is applied over all surfaces of the inlet assembly.

13. The method according to claim 9, further comprising:

disposing a screen over the sensor port.

14. The method according to claim 9, wherein the plurality of openings include pairs of openings disposed across the inlet assembly from one another that enables the fluid flow across the shaped volume to remove the ice ejected from the shaped volume.

15. The method according to claim 9, further comprising:

attaching the inlet assembly over the sensor port.

16. The method according to claim 9, wherein the sensor port is a port of a pressure sensor.

17. A sensor system, comprising:

a sensor including a sensor port; and

an icing resistant sensor port device disposed over the sensor port, wherein the icing resistant sensor port device includes;

an inlet assembly having a shaped volume that resists ice plug formation, wherein a shape of the shaped volume causes application of a force vector component to ice that forms within the shaped volume to eject the ice away from the inlet assembly;

a plurality of edges disposed on the inlet assembly, wherein the edges have small surface areas that resist ice formation; and

a plurality of openings disposed in the inlet assembly that provide for fluid flow across the shaped volume of the inlet assembly, wherein the fluid flow provided by the plurality of openings causes removal of the ice ejected by the shaped volume.

18. The sensor system according to claim 17, wherein the sensor is a pressure sensor.

19. The sensor system according to claim 17, wherein the shaped volume is a cone shape.

20. The sensor system according to claim 17, further comprising:

an anti-wetting film that is disposed on at least one surface of the inlet assembly.

21. The sensor system according to claim 20, wherein the anti-wetting film is disposed over all surfaces of the inlet assembly.

22. The sensor system according to claim 17, further comprising:

a screen disposed in the inlet assembly over the sensor port.

23. The sensor system according to claim 17, wherein the plurality of openings include pairs of openings disposed across the inlet assembly from one another that enables the fluid flow across the shaped volume to remove the ice ejected from the shaped volume.

24. The sensor system according to claim 17, further comprising:

a base assembly coupled to the inlet assembly that attaches the inlet assembly over the sensor port.

25. The sensor system according to claim 17, wherein the sensor system is coupled to an aircraft fuel tank.