United Technologies Corporation

Carrier Corporation

William F Caswell

Michael Stockbridge

Edward F Dreger, Iii

Allison Clark Nicklous

A cargo () detection system for a refrigerated cargo container () includes a cargo sensor () body configured to detect presence of cargo () in a refrigerated cargo container () and a sensor bracket () configured for securing the cargo sensor () body at a refrigeration unit () of the refrigerated cargo container (). A temperature sensor () is located at the cargo sensor () body and is configured to detect a temperature of the cargo sensor () body. A temperature controller () is operably connected to the temperature sensor () and is configured to activate the cargo sensor () body for collection of data when the temperature of the cargo sensor () body is above a threshold.

Arc fault detection in transport refrigeration unit

A method includes rotating a rotor, measuring a rotor rotational time for the rotor to complete a revolution, determining a blade interval by dividing the rotor rotational time by a number of blades carried on the rotor, establishing an active hold-off time interval as a percentage of the blade interval time, directing a beam of light at the blades of the rotor using a laser, sensing light reflected from the blades, generating an output signal as a function of the sensed light, establishing a signal amplitude threshold, analyzing an amplitude of the output signal to trigger the active hold-off time interval when the amplitude reaches the signal amplitude threshold, and generating a blade arrival signal as a function of triggered active hold-off time intervals. The output signal is not analyzed within each active hold-off time interval.

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Baldwinsville, NY, United States of America

William F Caswell