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Piezoelectric Pressure Sensors as Switching Devices

Gao, Weibo (2019) Piezoelectric Pressure Sensors as Switching Devices. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

In this thesis, the applications where the piezoelectric pressure sensors using as switching devices were explored. To begin with, the piezoelectric pressure sensor was designed and manufactured. The piezoelectric Lead Zirconate Titanate (PZT) disks with customized thickness, fabricated by the tape-casting process, were used in this sensor as sensing element because of its great piezoelectric property. Two most widely used structure designs of the pressure sensors were compared and the PZT pressure sensor using unimorph structure was selected and manufactured. A unimorph structure model was established for the theoretical static and dynamic analysis of the pressure sensor. Based on the analysis, several pressure sensor samples with improved sensitivity and simple structure ware manufactured. Using these pressure sensors, two experiment where the pressure sensors were used as switching devices were studied. For the first experiment, one pressure sensor was connected to an Arduino UNO board to form a trigger switch, which was designed to control a DC motor. By properly designing program algorithms and adjust the control parameter, it is successfully realized to change the working state through touching the pressure sensor. As for the second experiment, a dimmer switch which consists of two pressure sensors were designed. The dimmer switch was also connected with the Arduino board to adjust the brightness of a dimmable LED. A brightness gradient was designed in the control program, which makes different brightness levels achievable by touching different positions on the dimmer switch.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Gao, Weiboweg40@pitt.eduweg40
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorWang, Qing-Mingqiw4@pitt.eduqiw4
Committee MemberSmolinski, Patrickpatsmol@pitt.edupatsmol
Committee MemberBang, Hengheng.ban@pitt.eduheng.ban
Date: 19 June 2019
Date Type: Publication
Defense Date: 5 April 2019
Approval Date: 19 June 2019
Submission Date: 5 April 2019
Access Restriction: 3 year -- Restrict access to University of Pittsburgh for a period of 3 years.
Number of Pages: 71
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Piezoelectric Pressure Sensor Switching Devices Arduino
Date Deposited: 19 Jun 2019 15:48
Last Modified: 19 Jun 2019 15:48
URI: http://d-scholarship.pitt.edu/id/eprint/36376

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