---
_id: '9978'
abstract:
- lang: eng
  text: Piezoelectric transducers are used in a wide range of applications. Reliability
    of these transducers is an important aspect in their application. Prognostics,
    which involve continuous monitoring of the health of technical systems and using
    this information to estimate the current health state and consequently predict
    the remaining useful lifetime (RUL), can be used to increase the reliability,
    safety, and availability of the transducers. This is achieved by utilizing the
    health state and RUL predictions to adaptively control the usage of the components
    or to schedule appropriate maintenance without interrupting operation. In this
    work, a prognostic approach utilizing self-sensing, where electric signals of
    a piezoelectric transducer are used as the condition monitoring data, is proposed.
    The approach involves training machine learning algorithms to model the degradation
    of the transducers through a health index and the use of the learned model to
    estimate the health index of similar transducers. The current health index is
    then used to estimate RUL of test components. The feasibility of the approach
    is demonstrated using piezoelectric bimorphs and the results show that the method
    is accurate in predicting the health index and RUL.
author:
- first_name: James Kuria
  full_name: Kimotho, James Kuria
  last_name: Kimotho
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: 'Kimotho JK, Sextro W, Hemsel T. Estimation of Remaining Useful Lifetime of
    Piezoelectric Transducers Based on Self-Sensing. In: <i>IEEE Transactions on Reliability</i>.
    ; 2017:1-10. doi:<a href="https://doi.org/10.1109/TR.2017.2710260">10.1109/TR.2017.2710260</a>'
  apa: Kimotho, J. K., Sextro, W., &#38; Hemsel, T. (2017). Estimation of Remaining
    Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing. In <i>IEEE
    Transactions on Reliability</i> (pp. 1–10). <a href="https://doi.org/10.1109/TR.2017.2710260">https://doi.org/10.1109/TR.2017.2710260</a>
  bibtex: '@inproceedings{Kimotho_Sextro_Hemsel_2017, title={Estimation of Remaining
    Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing}, DOI={<a href="https://doi.org/10.1109/TR.2017.2710260">10.1109/TR.2017.2710260</a>},
    booktitle={IEEE Transactions on Reliability}, author={Kimotho, James Kuria and
    Sextro, Walter and Hemsel, Tobias}, year={2017}, pages={1–10} }'
  chicago: Kimotho, James Kuria, Walter Sextro, and Tobias Hemsel. “Estimation of
    Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing.”
    In <i>IEEE Transactions on Reliability</i>, 1–10, 2017. <a href="https://doi.org/10.1109/TR.2017.2710260">https://doi.org/10.1109/TR.2017.2710260</a>.
  ieee: J. K. Kimotho, W. Sextro, and T. Hemsel, “Estimation of Remaining Useful Lifetime
    of Piezoelectric Transducers Based on Self-Sensing,” in <i>IEEE Transactions on
    Reliability</i>, 2017, pp. 1–10.
  mla: Kimotho, James Kuria, et al. “Estimation of Remaining Useful Lifetime of Piezoelectric
    Transducers Based on Self-Sensing.” <i>IEEE Transactions on Reliability</i>, 2017,
    pp. 1–10, doi:<a href="https://doi.org/10.1109/TR.2017.2710260">10.1109/TR.2017.2710260</a>.
  short: 'J.K. Kimotho, W. Sextro, T. Hemsel, in: IEEE Transactions on Reliability,
    2017, pp. 1–10.'
date_created: 2019-05-27T09:41:06Z
date_updated: 2019-09-16T10:32:05Z
department:
- _id: '151'
doi: 10.1109/TR.2017.2710260
keyword:
- Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing
language:
- iso: eng
page: 1 - 10
publication: IEEE Transactions on Reliability
quality_controlled: '1'
status: public
title: Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based
  on Self-Sensing
type: conference
user_id: '55222'
year: '2017'
...
---
_id: '9785'
abstract:
- lang: eng
  text: Hydrothermal method enables to synthesize high quality piezoelectric materials.
    To shorten the reaction time and to get higher quality materials, we propose an
    ultrasonic irradiation to the solution during the hydrothermal method. We named
    it ultrasonic assisted hydrothermal method (UAHTM). We have synthesized lead-free
    piezoelectric material and PZT thin film and the effect of UAHTM have been confirmed.
    In this study, we tried to improve UAHTM. First, to generate powerful and stable
    ultrasonic irradiation at high temperature on UAHTM, we developed a new transducer
    using LiNbO3 single crystal. Second, to prevent contamination to the materials,
    A Teflon cover on the tip of transducer was attached.
author:
- first_name: Gaku
  full_name: Isobe, Gaku
  last_name: Isobe
- first_name: Ryo
  full_name: Ageba, Ryo
  last_name: Ageba
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
citation:
  ama: 'Isobe G, Ageba R, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of piezoelectric
    materials by ultrasonic assisted hydrothermal method. In: B. J. Linde B, Paczkowski
    J, Ponikwicki N, eds. <i>AIP Conference Proceedings</i>. Vol 1433. AIP; 2012:569-572.
    doi:<a href="https://doi.org/10.1063/1.3703251">10.1063/1.3703251</a>'
  apa: Isobe, G., Ageba, R., Maeda, T., Bornmann, P., Hemsel, T., &#38; Morita, T.
    (2012). Synthesis of piezoelectric materials by ultrasonic assisted hydrothermal
    method. In B. B. J. Linde, J. Paczkowski, &#38; N. Ponikwicki (Eds.), <i>AIP Conference
    Proceedings</i> (Vol. 1433, pp. 569–572). AIP. <a href="https://doi.org/10.1063/1.3703251">https://doi.org/10.1063/1.3703251</a>
  bibtex: '@inproceedings{Isobe_Ageba_Maeda_Bornmann_Hemsel_Morita_2012, title={Synthesis
    of piezoelectric materials by ultrasonic assisted hydrothermal method}, volume={1433},
    DOI={<a href="https://doi.org/10.1063/1.3703251">10.1063/1.3703251</a>}, number={1},
    booktitle={AIP Conference Proceedings}, publisher={AIP}, author={Isobe, Gaku and
    Ageba, Ryo and Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita,
    Takeshi}, editor={B. J. Linde, Bogumil and Paczkowski, Jacek and Ponikwicki, NikodemEditors},
    year={2012}, pages={569–572} }'
  chicago: Isobe, Gaku, Ryo Ageba, Takafumi Maeda, Peter Bornmann, Tobias Hemsel,
    and Takeshi Morita. “Synthesis of Piezoelectric Materials by Ultrasonic Assisted
    Hydrothermal Method.” In <i>AIP Conference Proceedings</i>, edited by Bogumil
    B. J. Linde, Jacek Paczkowski, and Nikodem Ponikwicki, 1433:569–72. AIP, 2012.
    <a href="https://doi.org/10.1063/1.3703251">https://doi.org/10.1063/1.3703251</a>.
  ieee: G. Isobe, R. Ageba, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis
    of piezoelectric materials by ultrasonic assisted hydrothermal method,” in <i>AIP
    Conference Proceedings</i>, 2012, vol. 1433, no. 1, pp. 569–572.
  mla: Isobe, Gaku, et al. “Synthesis of Piezoelectric Materials by Ultrasonic Assisted
    Hydrothermal Method.” <i>AIP Conference Proceedings</i>, edited by Bogumil B.
    J. Linde et al., vol. 1433, no. 1, AIP, 2012, pp. 569–72, doi:<a href="https://doi.org/10.1063/1.3703251">10.1063/1.3703251</a>.
  short: 'G. Isobe, R. Ageba, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, in: B.
    B. J. Linde, J. Paczkowski, N. Ponikwicki (Eds.), AIP Conference Proceedings,
    AIP, 2012, pp. 569–572.'
date_created: 2019-05-13T13:21:56Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1063/1.3703251
editor:
- first_name: Bogumil
  full_name: B. J. Linde, Bogumil
  last_name: B. J. Linde
- first_name: Jacek
  full_name: Paczkowski, Jacek
  last_name: Paczkowski
- first_name: Nikodem
  full_name: Ponikwicki, Nikodem
  last_name: Ponikwicki
intvolume: '      1433'
issue: '1'
keyword:
- contamination
- lead compounds
- piezoelectric materials
- piezoelectric thin films
- piezoelectric transducers
- ultrasonic effects
language:
- iso: eng
page: 569-572
publication: AIP Conference Proceedings
publisher: AIP
quality_controlled: '1'
status: public
title: Synthesis of piezoelectric materials by ultrasonic assisted hydrothermal method
type: conference
user_id: '55222'
volume: 1433
year: '2012'
...
---
_id: '9568'
abstract:
- lang: eng
  text: A simple pre-stress estimate method of Langevin transducers is studied. The
    measurement setup consists of a capacitor, an impedance converter and a voltmeter.
    Based on the piezoelectric equation and the basic circuit theory, the mathematical
    expression between the pre-stress and the voltage across the capacitor is derived.
    The pre-stress level can then be calculated out of the measurement of the capacitor
    voltage. In order to evaluate the precision of this method, a force washer is
    used to measure the pre-stress of the Langevin transducer. The result shows the
    pre-stress level obtained from this method is 30-40\% higher than the pre-stress
    level measured by the force washer. This method is simple and can be used to estimate
    the pre-stress of various Langevin transducers. The precision of this method can
    be raised if d33 is identified under different pre-stress levels.
author:
- first_name: Fu
  full_name: Bo, Fu
  last_name: Bo
- first_name: Li
  full_name: Ting, Li
  last_name: Ting
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: 'Bo F, Ting L, Hemsel T. A simple pre-stress estimating method of langevin
    transducers. In: <i>Piezoelectricity, Acoustic Waves, and Device Applications,
    2008. SPAWDA 2008. Symposium On</i>. ; 2008:324-327. doi:<a href="https://doi.org/10.1109/SPAWDA.2008.4775801">10.1109/SPAWDA.2008.4775801</a>'
  apa: Bo, F., Ting, L., &#38; Hemsel, T. (2008). A simple pre-stress estimating method
    of langevin transducers. In <i>Piezoelectricity, Acoustic Waves, and Device Applications,
    2008. SPAWDA 2008. Symposium on</i> (pp. 324–327). <a href="https://doi.org/10.1109/SPAWDA.2008.4775801">https://doi.org/10.1109/SPAWDA.2008.4775801</a>
  bibtex: '@inproceedings{Bo_Ting_Hemsel_2008, title={A simple pre-stress estimating
    method of langevin transducers}, DOI={<a href="https://doi.org/10.1109/SPAWDA.2008.4775801">10.1109/SPAWDA.2008.4775801</a>},
    booktitle={Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA
    2008. Symposium on}, author={Bo, Fu and Ting, Li and Hemsel, Tobias}, year={2008},
    pages={324–327} }'
  chicago: Bo, Fu, Li Ting, and Tobias Hemsel. “A Simple Pre-Stress Estimating Method
    of Langevin Transducers.” In <i>Piezoelectricity, Acoustic Waves, and Device Applications,
    2008. SPAWDA 2008. Symposium On</i>, 324–27, 2008. <a href="https://doi.org/10.1109/SPAWDA.2008.4775801">https://doi.org/10.1109/SPAWDA.2008.4775801</a>.
  ieee: F. Bo, L. Ting, and T. Hemsel, “A simple pre-stress estimating method of langevin
    transducers,” in <i>Piezoelectricity, Acoustic Waves, and Device Applications,
    2008. SPAWDA 2008. Symposium on</i>, 2008, pp. 324–327.
  mla: Bo, Fu, et al. “A Simple Pre-Stress Estimating Method of Langevin Transducers.”
    <i>Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008.
    Symposium On</i>, 2008, pp. 324–27, doi:<a href="https://doi.org/10.1109/SPAWDA.2008.4775801">10.1109/SPAWDA.2008.4775801</a>.
  short: 'F. Bo, L. Ting, T. Hemsel, in: Piezoelectricity, Acoustic Waves, and Device
    Applications, 2008. SPAWDA 2008. Symposium On, 2008, pp. 324–327.'
date_created: 2019-04-29T11:16:13Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/SPAWDA.2008.4775801
keyword:
- capacitors
- impedance convertors
- piezoelectric transducers
- stress analysis
- Langevin transducers
- basic circuit theory
- capacitor
- impedance converter
- piezoelectric equation
- pre-stress estimating method
- voltmeter
- Capacitors
- Educational institutions
- Equations
- Force measurement
- Impedance measurement
- Manufacturing
- Mechatronics
- Piezoelectric transducers
- Voltage
- Voltmeters
- Langevin transducer
- capacitor
- piezoelectric element
- pre-stress
language:
- iso: eng
page: 324-327
publication: Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA
  2008. Symposium on
status: public
title: A simple pre-stress estimating method of langevin transducers
type: conference
user_id: '55222'
year: '2008'
...