Patent ID: 11913977
Assignee: ROSEMOUNT AEROSPACE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  B | IPC B  G  H

Claim 8:
9. A system for an aircraft, the system comprising:
an air data probe that includes a positive temperature coefficient resistor (PTCR) heater assembly, wherein an input voltage is provided to the PTCR heater assembly to provide heating for the air data probe; and
a health monitoring system comprising:
a first sensor configured to sense the input voltage at the PTCR heater assembly; and
a second sensor configured to sense a current through the PTCR heater assembly;

wherein the health monitoring system is configured to determine a baseline characteristic and an observed characteristic each relating to an inrush peak of the PTCR heater assembly and based on the input voltage and the current; wherein the health monitoring system compares the observed characteristic to the baseline characteristic to assess a health status of the PTCR heater assembly; and wherein the health monitoring system outputs the health status for PTCR heater assembly diagnostics and/or prognostics.