초록 ▼

A smart probe system for an aircraft receives an input from a heated total air temperature sensor. When on the ground, the heater for the total air temperature probe is cycled so that when a preselected temperature is indicated by the temperature sensing element in the total air temperature probe, t

A smart probe system for an aircraft receives an input from a heated total air temperature sensor. When on the ground, the heater for the total air temperature probe is cycled so that when a preselected temperature is indicated by the temperature sensing element in the total air temperature probe, the heater power is turned off, and as the total air temperature probe cools, changes. Changes in indicated temperature from the temperature sensing element are measured and the changes analyzed and used for determining outside air temperature. The outside air temperature can be calculated by determining the rate of change in the temperature while the probe cools. A complimentary method is to determine when the indicated temperature stabilizes, after the heater is turned off, and deriving outside air temperature from the stabilized temperature signal from the sensing element.

대표청구항 ▼

1. A method of determining outside air temperature using temperature signals from a heated total air temperature probe coupled to a processor comprising:maintaining a probe heater under power with a minimum volume of airflow past the total temperature probe sensor; setting a maximum temperature to b

1. A method of determining outside air temperature using temperature signals from a heated total air temperature probe coupled to a processor comprising:maintaining a probe heater under power with a minimum volume of airflow past the total temperature probe sensor; setting a maximum temperature to be sensed from the total temperature probe; shutting off power to the heater when the maximum temperature is sensed; and analyzing changes in temperature indicated by the temperature signals subsequent to shutting off the power for determining outside air temperature.