METHOD OF DETECTING A FAULT WITH THE MEANS FOR DE-ICING A PROBE FOR MEASURING A PHYSICAL PARAMETER

• US 20130088249A1
• Filed: 06/22/2011
• Published: 04/11/2013
• Est. Priority Date: 06/25/2010
• Status: Active Grant

• Current Assignee: Safran Aircraft Engine Company
• Original Assignee: Snecma (Safran SA)
• Inventors: Godel, Franck, Biraud, Benoit
• Granted Patent: US 8,994,392 B2
• Time in Patent Office: Days
• US Class Current: 324/750.3
• CPC Class Codes: B64D 15/20 Means for detecting icing or initiating de-icing
• CPC Class Codes: F01D 17/08 responsive to condition of working-fluid, e.g. pressure
• CPC Class Codes: F05D 2260/80 Diagnostics
• CPC Class Codes: F05D 2260/85 Starting
• CPC Class Codes: G01D 3/08 with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
• CPC Class Codes: G01K 15/00 Testing or calibrating of thermometers
• CPC Class Codes: G01K 15/007 Testing
• CPC Class Codes: G01R 31/2829 Testing of circuits in sensor or actuator systems testing of apparatus for measuring electric or magnetic variables G01R35/00; testing of indicating or recording apparatus G01D; in airbag systems B60R21/0173; checking gas analysers G01N33/007; monitoring or fail-safe circuits for electromagnets H01F7/1844

Abstract

A method of detecting a fault in a de-icer probe for measuring a physical parameter on an airplane engine, the method including: prior to starting an engine, measuring a first value of the physical parameter with help of the probe; activating the probe de-icer; at an end of a determined duration from a start of de-icing, measuring a second value of the parameter with help of the probe; and comparing the first and second values and generating a fault signal if the difference between the first and second values is less than a determined threshold.

Claims

1-4. -4. (canceled)

5. :

A method of detecting a fault in a de-icer means of a probe for measuring a physical parameter on an airplane engine, the method comprising;

prior to starting an engine, measuring a first value of the physical parameter with help of the probe;

activating the probe de-icer means;

at an end of a determined duration from a start of de-icing, measuring a second value of the parameter with help of the probe; and

comparing the first and second values and generating a fault signal if the difference between the first and second values is less than a determined threshold.

6. :

A method according to claim 5, wherein the parameter measured with help of the probe is temperature.

7. :

A method according to claim 5, wherein the parameter measured with help of the probe is pressure.

8. :

A method according to claim 5, wherein the second value of the parameter is measured with help of the probe after a duration lying in a range of 10 seconds to 1 minute from the start of de-icing.

9. :

A method according to claim 5, wherein the second value of the parameter is measured with help of the probe after a duration equal to about 20 seconds.