Method for detecting a latent failure mode in an electronic selector having an interface switch and at least two underlying switches
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United States of America Patent
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May 29, 2018
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app pub date -
Aug 15, 2016
filing date -
Aug 15, 2016
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Abstract
A method for detecting a latent failure mode in an electronic selector having an interface switch and at least two underlying switches includes tracking and counting each of the underlying switch's close/open status change counts in the context of tracking and counting the interface switch selection status change counts. The method continues by calculating the ratio of each underlying switch's close or open status change counts against the interface switch selection status change counts. By comparing these ratios from each underlying switch in respect to the interface switch selection status change counts, a set of new algorithms are formulated to detect an interface switch latent failure mode due to either one of the at least two underlying switches stuck to open or one of the at least two underlying switches chattering between close and open states at a relatively high frequency compared to the interface switch selection event.
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