DUMB BOX GOT SMARTER.(Sensing and Diagnostic Modules)(Brief Article)
AutoWeek, November, 2004 by Gritzinger, Bob
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Byline: Bob Gritzinger When it comes to today's fairly complex Event Data Recorders, you can blame airbags for getting the ball rolling. Back in the mid-1970s General Motors first began installing EDR-precursor SDMs, aka Sensing and Diagnostic Modules, on cars fitted with the earliest airbags.
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The SDMs recorded post-crash data only-performance of the airbag and the severity of the crash as measured in gs-so that engineers could download the data and use it to make smarter airbags. "It was set up strictly to record data for safety and research purposes,'' says Jim Schell, GM ...
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