A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications

Behrokh Abbasnejad; David McGloin; Lee Clemon

doi:10.1115/IMECE2020-23629

A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications

Behrokh Abbasnejad, David McGloin, Lee Clemon^* (Corresponding Author)

^*Corresponding author for this work

Physics

University of Technology Sydney

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Abstract

Direct low flow sensing is of interest to many applications in medical and biochemical industries. Low flow rate measurement is still challenging, and conventional flow sensors such as hot films, hot wires and Pitot probes are not capable of measuring very low flow rates accurately. In some applications that require flow measurement in a small diameter tubing (e.g. intravenous (IV) infusion), using such sensors also becomes mechanically impractical. Herein, a flexible laser-induced graphitic (LIG) piezoresistive flow sensor has been fabricated in a cost-effective single processing step. The capability of the LIG sensor in very low flow rate measurement has been investigated by embedding the sensor within an intravenous (IV) line. The embedded LIG hair-like sensor was tested at ambient temperature within the IV line at flow rates ranging from 0 m/s to 0.3 m/s (IV infusion free-flow rate). The LIG hair-like sensor presented in this study detects live flow rates of IV infusions with a threshold detection limit as low as 0.02 m/s. Moreover, the deformation of the LIG hair-like sensor that lead to resistance change in response to various flow rates is simulated using COMSOL Multiphysics.

Original language	English
Title of host publication	Biomedical and Biotechnology
Publisher	American Society of Mechanical Engineers(ASME)
Number of pages	5
Volume	5
ISBN (Electronic)	9780791884522
DOIs	https://doi.org/10.1115/IMECE2020-23629
Publication status	Published - 16 Feb 2021
Event	ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020 - Virtual, Online Duration: 16 Nov 2020 → 19 Nov 2020

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	5

Conference

Conference	ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020
City	Virtual, Online
Period	16/11/20 → 19/11/20

Bibliographical note

Funding Information:
This work was completed as part of a PhD project with the Faculty of Engineering, University of Technology Sydney (UTS) through Australian Government Research Training Program (RTP) Scholarship.

Access to Document

10.1115/IMECE2020-23629Licence: Unspecified

Cite this

Abbasnejad, B., McGloin, D., & Clemon, L. (2021). A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications. In Biomedical and Biotechnology (Vol. 5). Article V005T05A073 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 5). American Society of Mechanical Engineers(ASME). https://doi.org/10.1115/IMECE2020-23629

A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications. / Abbasnejad, Behrokh; McGloin, David; Clemon, Lee (Corresponding Author).
Biomedical and Biotechnology. Vol. 5 American Society of Mechanical Engineers(ASME), 2021. V005T05A073 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Abbasnejad, B, McGloin, D & Clemon, L 2021, A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications. in Biomedical and Biotechnology. vol. 5, V005T05A073, ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 5, American Society of Mechanical Engineers(ASME), ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020, Virtual, Online, 16/11/20. https://doi.org/10.1115/IMECE2020-23629

Abbasnejad B, McGloin D, Clemon L. A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications. In Biomedical and Biotechnology. Vol. 5. American Society of Mechanical Engineers(ASME). 2021. V005T05A073. (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)). Epub 2020 Nov 16. doi: 10.1115/IMECE2020-23629

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AB - Direct low flow sensing is of interest to many applications in medical and biochemical industries. Low flow rate measurement is still challenging, and conventional flow sensors such as hot films, hot wires and Pitot probes are not capable of measuring very low flow rates accurately. In some applications that require flow measurement in a small diameter tubing (e.g. intravenous (IV) infusion), using such sensors also becomes mechanically impractical. Herein, a flexible laser-induced graphitic (LIG) piezoresistive flow sensor has been fabricated in a cost-effective single processing step. The capability of the LIG sensor in very low flow rate measurement has been investigated by embedding the sensor within an intravenous (IV) line. The embedded LIG hair-like sensor was tested at ambient temperature within the IV line at flow rates ranging from 0 m/s to 0.3 m/s (IV infusion free-flow rate). The LIG hair-like sensor presented in this study detects live flow rates of IV infusions with a threshold detection limit as low as 0.02 m/s. Moreover, the deformation of the LIG hair-like sensor that lead to resistance change in response to various flow rates is simulated using COMSOL Multiphysics.

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A flexible hair-like laser induced graphitic sensor for low flow rate sensing applications

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