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Piezoelectric Accelerometer with Improved Temperature Stability

Wenhao, Huang (2021) Piezoelectric Accelerometer with Improved Temperature Stability. Master's Thesis, University of Pittsburgh. (Unpublished)

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Piezoceramic materials like PZT allow the manufacturing of piezoelectric sensors with advantages including high sensitivity, low price, and easy to shape. However, it is also featured with the pyroelectric effect, which brings extra charge generation with temperature variations. Those charges caused by the thermal effect contribute to errors in the sensor measurement result. Theoretically, the appropriate configuration of the sensor would neutralize the thermal effect. In this thesis, a triple layer piezoelectric sensor with a parallel connection would be used to check its thermal stability at elevated temperatures. The thesis begins with reviewing the fundamental concepts of piezoelectricity. The following section contains the analysis of the relationship between the different external inputs and the output of a triple layer sensor. The experiment is designed to put the triple layer sensor in a chamber with a temperature control system to test its performance at around 35 ℃ with sinusoidal excitation input. A unimorph sensor would be set as the reference group, so that the result of the triple layer sensor could have a comparison with. The cancellation of the temperature effect in the triple layer sensor successfully reduces the output deviation to an acceptable level. Meanwhile, the unimorph structure sensor exhibits obvious instability under the same conditions.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Wenhao, Huangweh59@pitt.eduweh590000-0003-0420-2243
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorQing-Ming,
Committee MemberHeng,
Committee MemberPatrick,
Date: 13 June 2021
Date Type: Publication
Defense Date: 8 April 2021
Approval Date: 13 June 2021
Submission Date: 26 March 2021
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 57
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Piezoelectric Temperature
Date Deposited: 13 Jun 2021 18:51
Last Modified: 13 Jun 2021 18:51


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