[{"type":"conference","publication":"IEEE Transactions on Reliability","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."}],"status":"public","_id":"9978","user_id":"55222","department":[{"_id":"151"}],"keyword":["Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing"],"language":[{"iso":"eng"}],"quality_controlled":"1","year":"2017","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>","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.","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>.","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>","short":"J.K. Kimotho, W. Sextro, T. Hemsel, in: IEEE Transactions on Reliability, 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>.","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} }"},"page":"1 - 10","date_updated":"2019-09-16T10:32:05Z","author":[{"last_name":"Kimotho","full_name":"Kimotho, James Kuria","first_name":"James Kuria"},{"last_name":"Sextro","id":"21220","full_name":"Sextro, Walter","first_name":"Walter"},{"full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel","first_name":"Tobias"}],"date_created":"2019-05-27T09:41:06Z","title":"Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing","doi":"10.1109/TR.2017.2710260"},{"author":[{"full_name":"Isobe, Gaku","last_name":"Isobe","first_name":"Gaku"},{"first_name":"Ryo","full_name":"Ageba, Ryo","last_name":"Ageba"},{"first_name":"Takafumi","full_name":"Maeda, Takafumi","last_name":"Maeda"},{"full_name":"Bornmann, Peter","last_name":"Bornmann","first_name":"Peter"},{"first_name":"Tobias","last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias"},{"first_name":"Takeshi","full_name":"Morita, Takeshi","last_name":"Morita"}],"date_created":"2019-05-13T13:21:56Z","volume":1433,"date_updated":"2022-01-06T07:04:20Z","publisher":"AIP","doi":"10.1063/1.3703251","title":"Synthesis of piezoelectric materials by ultrasonic assisted hydrothermal method","issue":"1","quality_controlled":"1","citation":{"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.","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>.","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} }","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>","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>","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."},"intvolume":"      1433","page":"569-572","year":"2012","user_id":"55222","department":[{"_id":"151"}],"_id":"9785","language":[{"iso":"eng"}],"keyword":["contamination","lead compounds","piezoelectric materials","piezoelectric thin films","piezoelectric transducers","ultrasonic effects"],"type":"conference","publication":"AIP Conference Proceedings","status":"public","editor":[{"full_name":"B. J. Linde, Bogumil","last_name":"B. J. Linde","first_name":"Bogumil"},{"full_name":"Paczkowski, Jacek","last_name":"Paczkowski","first_name":"Jacek"},{"first_name":"Nikodem","last_name":"Ponikwicki","full_name":"Ponikwicki, Nikodem"}],"abstract":[{"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.","lang":"eng"}]},{"date_updated":"2022-01-06T07:04:16Z","date_created":"2019-04-29T11:16:13Z","author":[{"first_name":"Fu","last_name":"Bo","full_name":"Bo, Fu"},{"first_name":"Li","full_name":"Ting, Li","last_name":"Ting"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"}],"title":"A simple pre-stress estimating method of langevin transducers","doi":"10.1109/SPAWDA.2008.4775801","year":"2008","page":"324-327","citation":{"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>","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>.","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} }","short":"F. Bo, L. Ting, T. Hemsel, in: Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008. Symposium On, 2008, pp. 324–327.","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.","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>.","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>"},"_id":"9568","department":[{"_id":"151"}],"user_id":"55222","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"}],"publication":"Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008. Symposium on","type":"conference","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."}],"status":"public"}]