Iranian Journal of Manufacturing Engineering

Iranian Journal of Manufacturing Engineering

Development of a digital shear stress sensor based on induced phase difference, in order to prevent bedsores

Document Type : Original Article

Authors
Kiana Sadaat Mousavi Jarahi 1
Yousef Hojjat 2
Behzad Ghavami Namin 3
1 MSc Student, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
2 Professor, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
3 PhD Student, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
10.22034/ijme.2024.434979.1916
Abstract
In this article, a new sensor is presented that measures the shear stress based on the phase difference. In this method, first, using a spring, the force resulting from the shear stress is converted into displacement, and then the displacement is measured. The basis of displacement measurement is the induction of current between two flat coils that are opposite each other. One of these coils is fixed and the other is movable. Each step that the moving coil moves on the fixed coil, its output voltage changes its phase by 2 V Because the resulting phase difference is proportional to the displacement, the amount of movement of the moving coil can be obtained from the measurement of the phase difference. Based on this, a two-dimensional sensor has been designed and simulated that can measure in both x and y directions. The simulation has been done mechanically-magnetically, that is, for moving the electrodes, the output phase difference has been obtained separately in both x and y directions.
Keywords
Magnetic Induction
Shear Force
Phase Difference
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Iranian Journal of Manufacturing Engineering
Volume 10, Issue 7 - Serial Number 69
September 2023
Pages 36-44