Traceable calibration and demonstration of a portable dynamic force transfer standard

Nicholas Vlajic, Ako Chijioke

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In general, the dynamic sensitivity of a force transducer depends upon the mechanical system in which it is used. This dependence serves as motivation to develop a dynamic force transfer standard, which can be used to calibrate an application transducer in situ. In this work, we SI-traceably calibrate a hand-held force transducer, namely an impact hammer, by using a mass suspended from a thin line which is cut to produce a known dynamic force in the form of a step function. We show that this instrument is a promising candidate as a transfer standard, since its dynamic response has small variance between different users. This calibrated transfer standard is then used to calibrate a secondary force transducer in an example application setting. The combined standard uncertainty (k = 2) in the calibration of the transfer standard was determined to be 2.1% or less, up to a bandwidth of 5 kHz. The combined standard uncertainty (k = 2) in the performed transfer calibration was less than 4%, up to 3 kHz. An advantage of the transfer calibration framework presented here, is that the transfer standard can be used to transfer SI-traceable calibrations without the use of any SI-traceable voltage metrology instrumentation.

Original languageEnglish (US)
Pages (from-to)S83-S98
JournalMetrologia
Volume54
Issue number4
DOIs
StatePublished - Jul 18 2017

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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