The Boeing Company

Glenn R Reese

Joseph A Schneider

Methods and apparatus are provided for detecting sensor wiring faults. A difference is determined between a high voltage and a low voltage. The high voltage and the low voltage are both related to a sensor that includes a high-voltage wire and a low-voltage wire. A determination is made whether the difference has dropped based on a low-voltage threshold. After determining that the difference has dropped, a fault in the high-voltage wire is indicated. A determination is made whether the difference has risen based on a high-voltage threshold, where the low-voltage threshold is less than the high-voltage threshold. After determining that the difference has risen, a fault in the low-voltage wire is indicated.

Linear variable differential transformer (LVDT) secondary wiring intermittent failure monitor

Methods and apparatus are provided for detecting faults in excitation wiring. A first sum of a first high voltage and a first low voltage related to a first sensor is determined, where the first sensor is further related to an excitation voltage. A second sum of a second high voltage and a second low voltage related to a second sensor is determined, where the second sensor is further related to the excitation voltage. The excitation voltage is provided to both the first and second sensors using excitation wiring. A determination is made whether each of the first sum and the second sum changes beyond a threshold amount during a first time interval. After determining that each of the first sum and the second sum has changed beyond the threshold amount during the first time interval, an indication of a fault in the excitation wiring is provided.

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Swarthmore, PA, United States of America

Glenn R Reese