Hysteresis compensation of photoluminescence in ZnS:Cu for noncontact shaft torque sensing

Min Young Cho, Ji Sik Kim, Gi Woo Kim

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This paper presents a preliminary investigation of loading rate-dependent hysteresis of photoluminescence (PL) by phosphorescence quenching of copper-doped zinc sulfide (ZnS:Cu) microparticles in response to dynamic torsional loading. Precision sinusoidal torque waveforms in the frequency range of 0.5-3 Hz are used to identify the loading rate-dependent (i.e., frequency-dependent) nonlinear hysteresis phenomenon. The potential of the application of PL is demonstrated by successfully measuring the sinusoidal torque applied to a rotational shaft by evaluating the loading rate-dependent PL intensity signature using a photomultiplier tube. In addition, the potential of noncontact shaft torque sensing is demonstrated successfully by the simple compensation derived from ad hoc heuristic characterization.

Original languageEnglish
Pages (from-to)1670-1674
Number of pages5
JournalApplied Optics
Volume55
Issue number7
DOIs
StatePublished - 1 Mar 2016

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