The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor

Campaniform sensillum is a very sensitive strain sensing organ even though it is small in size. Various geometrical features which could contribute to strain sensing detection as being employed by the insect sensing organ were investigated. This study was carried out with the objective to investigat...

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Main Author:	Mohd. Yusof, Ab. Aziz
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/78436/1/AbAzizMohdMFBME2013.pdf
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spelling	my-utm-ep.784362018-08-26T11:54:59Z The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor 2013-08 Mohd. Yusof, Ab. Aziz TP Chemical technology Campaniform sensillum is a very sensitive strain sensing organ even though it is small in size. Various geometrical features which could contribute to strain sensing detection as being employed by the insect sensing organ were investigated. This study was carried out with the objective to investigate the effect of the geometry on the mechanical behaviour of campaniform sensillum by using biomimetic structures. The four structures were modelled as chip block, chip block with through hole, chip block with flat membrane-in-recess, and chip block with dome-shaped membrane to represent the features of campaniform sensillum. The potential of these structures as new sensing mechanism for strain sensing were evaluated using the finite element software as the result could be predicted together with associated strain and displacement. The results showed that hole and dome shape structure features were the main features that contributed to the excellent sensing behaviour of the mimetic structure. The sensing mechanism was started with the localization of strain around the hole several times higher than the applied load (first amplifier), before it was further transduced and amplified by the dome structure that acted as a transducer and second amplifier. Compared to the previous biomimetic structure of campaniform sensillum, the suggested biomimetic with the dome shape structure performed better by increasing the strain by a strain concentration factor of 5.45, whereas the structure with hole was 1.03 lower. Besides, combination of these features makes the devices to have higher sensitivity in term of a ratio of output signal to the input signal. In addition, the output signal in the form of vertical displacement was also improved. This makes the structure act efficiently to deliver the information related to strain detection. The obtained understanding can be applied in the design of highly miniaturized strain sensor for medical application. 2013-08 Thesis http://eprints.utm.my/id/eprint/78436/ http://eprints.utm.my/id/eprint/78436/1/AbAzizMohdMFBME2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:110412 masters Universiti Teknologi Malaysia, Faculty of Biosciences and Medical Engineering Faculty of Biosciences and Medical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mohd. Yusof, Ab. Aziz The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
description	Campaniform sensillum is a very sensitive strain sensing organ even though it is small in size. Various geometrical features which could contribute to strain sensing detection as being employed by the insect sensing organ were investigated. This study was carried out with the objective to investigate the effect of the geometry on the mechanical behaviour of campaniform sensillum by using biomimetic structures. The four structures were modelled as chip block, chip block with through hole, chip block with flat membrane-in-recess, and chip block with dome-shaped membrane to represent the features of campaniform sensillum. The potential of these structures as new sensing mechanism for strain sensing were evaluated using the finite element software as the result could be predicted together with associated strain and displacement. The results showed that hole and dome shape structure features were the main features that contributed to the excellent sensing behaviour of the mimetic structure. The sensing mechanism was started with the localization of strain around the hole several times higher than the applied load (first amplifier), before it was further transduced and amplified by the dome structure that acted as a transducer and second amplifier. Compared to the previous biomimetic structure of campaniform sensillum, the suggested biomimetic with the dome shape structure performed better by increasing the strain by a strain concentration factor of 5.45, whereas the structure with hole was 1.03 lower. Besides, combination of these features makes the devices to have higher sensitivity in term of a ratio of output signal to the input signal. In addition, the output signal in the form of vertical displacement was also improved. This makes the structure act efficiently to deliver the information related to strain detection. The obtained understanding can be applied in the design of highly miniaturized strain sensor for medical application.
format	Thesis
qualification_level	Master's degree
author	Mohd. Yusof, Ab. Aziz
author_facet	Mohd. Yusof, Ab. Aziz
author_sort	Mohd. Yusof, Ab. Aziz
title	The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
title_short	The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
title_full	The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
title_fullStr	The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
title_full_unstemmed	The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
title_sort	effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor
granting_institution	Universiti Teknologi Malaysia, Faculty of Biosciences and Medical Engineering
granting_department	Faculty of Biosciences and Medical Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/78436/1/AbAzizMohdMFBME2013.pdf
_version_	1747817988317249536

The effect of geometry on the micromechanical behaviour of campaniform sensillum biomimetic structure as strain sensor

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