DAS and Sensors Fundamentals: Part 6 - SAE J211 (ISO 6487) (05.45 min)

This video is an overview of SAE J211, presented by Mike Beckage, DTS (Diversified Technical Systems), co-founder. SAE International – The Engineering Society for Advancing Mobility Land Sea Air and Space, provides standards and guidelines for engineers.

SAE J211 refers to the instrumentation for impact testing. First published in 1970, with revisions since, the purpose of recommended practice SAE J211 is to provide guidelines for uniformity so there can be meaningful comparisons of DAS (data acquisition system) data between test locations.

The SAE committee meets twice per year and is trying to make J211 a better guidance document. The mission of J211: “Use of this recommended practice will provide a basis for meaningful comparisons of test results from different sources” (2:13).

Several parameters apply to measurements for the entire data channel which means when you buy DAS sensors or a data acquisition system you have to make sure everything is compatible with SAE J211. Mike covers SAE J211 key parameters including linearity error, amplitude against frequency, phase delay time, time base, relative time delay, and time of contact.

It’s all about getting good data through the passband, digitizing data properly with good engineering practices and then post processing to keep data comparable and meaningful.

DAS and Sensors Fundamentals

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