Traceable Calibration and Demonstration of a Portable Dynamic Force Transfer Standard

Published

July 18, 2017

Author(s)

Akobuije Chijioke

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 a working 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 the dynamic sensitivity has small invariance 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 less than 0.71 % 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.

Citation

Metrologia

Pub Type

Journals

Download Paper

DOI Link

Keywords

impact hammer, traceable dynamic force, force transfer standard

Citation

Chijioke, A. (2017), Traceable Calibration and Demonstration of a Portable Dynamic Force Transfer Standard, Metrologia, [online], https://doi.org/10.1088/1681-7575/aa75da (Accessed October 18, 2025)