Rosemount Aerospace Limited

Kenneth James Schram

John Albert Severson

Dennis J Cronin

John Timothy Otto

David George Owens

Joseph Michael Fanska

Systems and methods for electronics systems are provided herein. An electronics system may comprise a heating circuit and a fault detection system. The heating circuit may include a heating element. The fault detection system may include a first resistor comprising a first resistance, a second resistor comprising a second resistance, the first resistance being equal to the second resistance, a voltage level detector, and a controllable switch connected in series with the first resistor and the second resistor, the controllable switch in electronic communication with the voltage level detector. A fault may be detected in response to the first voltage being greater than the second voltage.

DC power heater short-to-chassis ground detection circuit

An ice detector for providing a signal indicating ice formation includes a probe protruding into an airflow. The probe extends into the airflow from a strut. The strut has one or more features which allow the probe to accrete ice at a higher temperature than would conventionally be possible. Strut features can include a notch formed therein in an upwind direction relative to the probe, and a curved surface adjacent a point of extension of the probe from the strut.

Ice detector for improved ice detection at near freezing condition

Ice accretion on a probe is detected by determining the change of frequency of a vibrating type ice detector or sensor as ice starts to build up. The rate of change of frequency is determined and is combined with parameters including air velocity and air temperature for providing a signal that indicates liquid water content in the airflow as well as ice accretion on the ice detector.

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Eden Prairie, MN, United States of America

Kenneth James Schram