Design and shape optimization of strain gauge load cell for axial force measurement for test benches

Al-Dahiree, Omar Sabah and Tokhi, Mohammad Osman and Hadi, Nabil Hassan and Hmoad, Nassar Rasheid and Ghazilla, Raja Ariffin Raja and Yap, Hwa Jen and Albaadani, Emad Abdullah (2022) Design and shape optimization of strain gauge load cell for axial force measurement for test benches. Sensors, 22 (19). ISSN 1424-8220, DOI

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The load cell is an indispensable component of many engineering machinery and industrial automation for measuring and sensing force and torque. This paper describes the design and analysis of the strain gauge load cell, from the conceptional design stage to shape optimization (based on the finite element method (FEM) technique) and calibration, providing ample load capacity with low-cost material (aluminum 6061) and highly accurate force measurement. The amplifier circuit of the half Wheatstone bridge configuration with two strain gauges was implemented experimentally with an actual load cell prototype. The calibration test was conducted to evaluate the load cell characteristics and derive the governing equation for sensing the unknown load depending on the measured output voltage. The measured sensitivity of the load cell is approximately 15 mV/N and 446.8 mu V/V at a maximum applied load of 30 kg. The findings are supported by FEM results and experiments with an acceptable percentage of errors, which revealed an overall error of 6% in the worst situation. Therefore, the proposed load cell meets the design considerations for axial force measurement for the laboratory test bench, which has a light weight of 20 g and a maximum axial force capacity of 300 N with good sensor characteristics.

Item Type: Article
Funders: Ministry of Higher Education (MOHE) Malaysia under Fundamental Research Grant Scheme (FRGS/1/2015/TK03/UM/02/6)
Uncontrolled Keywords: Strain gauge; Load cell; Machine design; Axial force measurement; Shape optimization; Finite element method (FEM); Wheatstone bridge; Amplifier circuit
Subjects: Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Jul 2023 08:36
Last Modified: 14 Jul 2023 08:36

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