Abstract:
PROBLEM TO BE SOLVED: To provide a method for reducing de-icing heater error (DHE) in a total air temperature (TAT) probe. SOLUTION: Using the method, a nominal DHE function is obtained for a particular type of TAT probe as a nominal DHE function derived from a plurality of TAT probes of the particular type (505). A probe specific correction coefficient is calculated for an individual TAT probe of the particular type as a function of a measured DHE at a first airflow and a predicted DHE at the first airflow (510). The predicted DHE at the first airflow is determined using the nominal DHE function derived from the plurality of TAT probes of the particular type. The probe specific correction coefficient is then stored and later used as a function of the probe specific correction coefficient to determine DHE for the individual TAT probe over a range of airflows (515). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thermal icing condition detector to solve problems of a conventional dry thermal sensor. SOLUTION: In an icing condition detection system, a circuit 122 provides an output representing impending icing conditions as a function of power consumption of a single element detector 102. A thermal isolation pedestal 106 includes a detector support end that supports the single element detector 102 and an opposite strut mounting end. A thermal isolation controller controls a thermal isolation pedestal temperature to thermally isolate the single element detector 102 from a strut mounting end. COPYRIGHT: (C)2011,JPO&INPIT