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Design of readout circuit for piezoresistive pressure sensor using nodal array approach reading technique


Citation

Wan Hasan, Wan Zuha and Mohamad Rashidi, Fairuz Rizal and Hamidon, Mohd Nizar and Wahab, Yufridin (2017) Design of readout circuit for piezoresistive pressure sensor using nodal array approach reading technique. Pertanika Journal of Science & Technology, 25 (spec. Feb.). pp. 215-224. ISSN 0128-7680; ESSN: 2231-8526

Abstract / Synopsis

In this paper, we proposed a new readout circuit in order to improve measurement output while reading the grouped resistive value in matrix array form. The purpose of having this circuit is to overcome the main problem in applying piezoresistive pressure sensor array for foot plantar application. This new approach is called Nodal Array Approach (NAA), a modified version of Wheatstone Bridge Circuit based on nodal analysis technique using Kirchcoff Current Law. The NAA calculates the sensors' resistance values by solving simultaneous equations from reading voltages of the proposed readout circuit. Therefore, it is found that the readout circuit connection is of low complexity as it only uses resistive element as the major component of reading technique with only four iterations involved for each voltage nodes. Through simulation results, it shows that NAA is able to achieve high accuracy in obtaining a sensor's resistance value by adhering to several limitations in order to avoid miscalculation (< 5% average calculation error).


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Universiti Putra Malaysia Press
Keywords: Resistive readout circuit; Resistive sensor array; Foot plantar application
Depositing User: Nabilah Mustapa
Date Deposited: 30 Jun 2017 17:50
Last Modified: 05 Jul 2017 11:37
URI: http://psasir.upm.edu.my/id/eprint/55868
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