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A Novel In-plane Displacement Signal Generation Technique for Testing the Measurement Accuracy of Vision-Based Displacement System

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Abstract

To test the measurement accuracy of a vision-based displacement system, a physical object with a known true displacement time history is measured and the differences between measured and true displacements are evaluated. However, generating this object using conventional methods is expensive and time consuming. Benefiting from the characteristics of liquid crystal display (LCD) pixels with precise dimensions and adjustable intensities, this paper describes an LCD-based motion simulation technique (LMST) that can easily generate this object in the form of an accurately controlled in-plane displacement signal. The precision of the signal is discussed, its implementation LMST is presented and some issues that should be taken into account when using it are presented.

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Acknowledgements

This work was financially supported by the China National Funds for Distinguished Young Scientists (52125805).

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Authors and Affiliations

  1. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 116024, China

    M. Wang, F. Xu & Z. Ma

  2. Vibration Engineering Section, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, UK

    J. Bownjohn

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  1. M. Wang
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  2. J. Bownjohn
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  3. F. Xu
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Correspondence to F. Xu.

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Wang, M., Bownjohn, J., Xu, F. et al. A Novel In-plane Displacement Signal Generation Technique for Testing the Measurement Accuracy of Vision-Based Displacement System. Exp Tech 47, 921–927 (2023). https://doi.org/10.1007/s40799-022-00593-2

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