---
_id: '62642'
author:
- first_name: Stephan
full_name: Kruse, Stephan
id: '38254'
last_name: Kruse
- first_name: Jan
full_name: Brockmeier, Jan
id: '67349'
last_name: Brockmeier
- first_name: Max
full_name: Schwengelbeck, Max
last_name: Schwengelbeck
- first_name: Tobias
full_name: Schwabe, Tobias
id: '39217'
last_name: Schwabe
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: 'Kruse S, Brockmeier J, Schwengelbeck M, Schwabe T, Scheytt JC. A Photonic
Assisted Visible Light FMCW Lidar System for Large Aperture Phased Array MIMO
Based on LEDs. In: 2025 55th European Microwave Conference (EuMC). ; 2025:602-605.
doi:10.23919/EuMC65286.2025.11235259'
apa: Kruse, S., Brockmeier, J., Schwengelbeck, M., Schwabe, T., & Scheytt, J.
C. (2025). A Photonic Assisted Visible Light FMCW Lidar System for Large Aperture
Phased Array MIMO Based on LEDs. 2025 55th European Microwave Conference (EuMC),
602–605. https://doi.org/10.23919/EuMC65286.2025.11235259
bibtex: '@inproceedings{Kruse_Brockmeier_Schwengelbeck_Schwabe_Scheytt_2025, title={A
Photonic Assisted Visible Light FMCW Lidar System for Large Aperture Phased Array
MIMO Based on LEDs}, DOI={10.23919/EuMC65286.2025.11235259},
booktitle={2025 55th European Microwave Conference (EuMC)}, author={Kruse, Stephan
and Brockmeier, Jan and Schwengelbeck, Max and Schwabe, Tobias and Scheytt, J.
Christoph}, year={2025}, pages={602–605} }'
chicago: Kruse, Stephan, Jan Brockmeier, Max Schwengelbeck, Tobias Schwabe, and
J. Christoph Scheytt. “A Photonic Assisted Visible Light FMCW Lidar System for
Large Aperture Phased Array MIMO Based on LEDs.” In 2025 55th European Microwave
Conference (EuMC), 602–5, 2025. https://doi.org/10.23919/EuMC65286.2025.11235259.
ieee: 'S. Kruse, J. Brockmeier, M. Schwengelbeck, T. Schwabe, and J. C. Scheytt,
“A Photonic Assisted Visible Light FMCW Lidar System for Large Aperture Phased
Array MIMO Based on LEDs,” in 2025 55th European Microwave Conference (EuMC),
2025, pp. 602–605, doi: 10.23919/EuMC65286.2025.11235259.'
mla: Kruse, Stephan, et al. “A Photonic Assisted Visible Light FMCW Lidar System
for Large Aperture Phased Array MIMO Based on LEDs.” 2025 55th European Microwave
Conference (EuMC), 2025, pp. 602–05, doi:10.23919/EuMC65286.2025.11235259.
short: 'S. Kruse, J. Brockmeier, M. Schwengelbeck, T. Schwabe, J.C. Scheytt, in:
2025 55th European Microwave Conference (EuMC), 2025, pp. 602–605.'
date_created: 2025-11-27T07:10:46Z
date_updated: 2025-11-27T07:11:40Z
department:
- _id: '58'
doi: 10.23919/EuMC65286.2025.11235259
keyword:
- Phased arrays
- Optical fibers
- Optical fiber sensors
- Laser radar
- Optical variables measurement
- Apertures
- Light emitting diodes
- Optical receivers
- Optical transmitters
- Optical modulation
- Lidar
- light detection and ranging
- FMCW
- frequency modulated contentious wave
- visible light sensing (VLS)
- visible light communication (VLC)
- automotive headlights
- light emitting diode (LED)
- microwave photonics
- wireless sensing
language:
- iso: eng
page: 602-605
publication: 2025 55th European Microwave Conference (EuMC)
status: public
title: A Photonic Assisted Visible Light FMCW Lidar System for Large Aperture Phased
Array MIMO Based on LEDs
type: conference
user_id: '38254'
year: '2025'
...
---
_id: '51518'
abstract:
- lang: eng
text: In applications of piezoelectric actuators and sensors, the dependability
and particularly the reliability throughout their lifetime are vital to manufacturers
and end-users and are enabled through condition-monitoring approaches. Existing
approaches often utilize impedance measurements over a range of frequencies or
velocity measurements and require additional equipment or sensors, such as a laser
Doppler vibrometer. Furthermore, the non-negligible effects of varying operating
conditions are often unconsidered. To minimize the need for additional sensors
while maintaining the dependability of piezoelectric bending actuators irrespective
of varying operating conditions, an online diagnostics approach is proposed. To
this end, time- and frequency-domain features are extracted from monitored current
signals to reflect hairline crack development in bending actuators. For validation
of applicability, the presented analysis method was evaluated on piezoelectric
bending actuators subjected to accelerated lifetime tests at varying voltage amplitudes
and under external damping conditions. In the presence of a crack and due to a
diminished stiffness, the resonance frequency decreases and the root-mean-square
amplitude of the current signal simultaneously abruptly drops during the lifetime
tests. Furthermore, the piezoelectric crack surfaces clapping is reflected in
higher harmonics of the current signal. Thus, time-domain features and harmonics
of the current signals are sufficient to diagnose hairline cracks in the actuators.
article_number: '521'
article_type: original
author:
- first_name: Osarenren Kennedy
full_name: Aimiyekagbon, Osarenren Kennedy
id: '9557'
last_name: Aimiyekagbon
- first_name: Amelie
full_name: Bender, Amelie
id: '54290'
last_name: Bender
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Aimiyekagbon OK, Bender A, Hemsel T, Sextro W. Diagnostics of Piezoelectric
Bending Actuators Subjected to Varying Operating Conditions. Electronics.
2024;13(3). doi:10.3390/electronics13030521
apa: Aimiyekagbon, O. K., Bender, A., Hemsel, T., & Sextro, W. (2024). Diagnostics
of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions.
Electronics, 13(3), Article 521. https://doi.org/10.3390/electronics13030521
bibtex: '@article{Aimiyekagbon_Bender_Hemsel_Sextro_2024, title={Diagnostics of
Piezoelectric Bending Actuators Subjected to Varying Operating Conditions}, volume={13},
DOI={10.3390/electronics13030521},
number={3521}, journal={Electronics}, publisher={MDPI AG}, author={Aimiyekagbon,
Osarenren Kennedy and Bender, Amelie and Hemsel, Tobias and Sextro, Walter}, year={2024}
}'
chicago: Aimiyekagbon, Osarenren Kennedy, Amelie Bender, Tobias Hemsel, and Walter
Sextro. “Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating
Conditions.” Electronics 13, no. 3 (2024). https://doi.org/10.3390/electronics13030521.
ieee: 'O. K. Aimiyekagbon, A. Bender, T. Hemsel, and W. Sextro, “Diagnostics of
Piezoelectric Bending Actuators Subjected to Varying Operating Conditions,” Electronics,
vol. 13, no. 3, Art. no. 521, 2024, doi: 10.3390/electronics13030521.'
mla: Aimiyekagbon, Osarenren Kennedy, et al. “Diagnostics of Piezoelectric Bending
Actuators Subjected to Varying Operating Conditions.” Electronics, vol.
13, no. 3, 521, MDPI AG, 2024, doi:10.3390/electronics13030521.
short: O.K. Aimiyekagbon, A. Bender, T. Hemsel, W. Sextro, Electronics 13 (2024).
date_created: 2024-02-20T06:46:43Z
date_updated: 2024-03-15T16:15:56Z
department:
- _id: '151'
doi: 10.3390/electronics13030521
funded_apc: '1'
intvolume: ' 13'
issue: '3'
keyword:
- piezoelectric transducer
- self-sensing
- fault detection
- diagnostics
- hairline crack
- condition monitoring
language:
- iso: eng
publication: Electronics
publication_identifier:
issn:
- 2079-9292
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating
Conditions
type: journal_article
user_id: '9557'
volume: 13
year: '2024'
...
---
_id: '34171'
abstract:
- lang: eng
text: State estimation when only a partial model of a considered system is available
remains a major challenge in many engineering fields. This work proposes a joint,
square-root unscented Kalman filter to estimate states and model uncertainties
simultaneously by linear combinations of physics-motivated library functions.
Using a sparsity promoting approach, a selection of those linear combinations
is chosen and thus an interpretable model can be extracted. Results indicate a
small estimation error compared to a traditional square-root unscented Kalman
filter and exhibit the enhancement of physically meaningful models.
author:
- first_name: Ricarda-Samantha
full_name: Götte, Ricarda-Samantha
id: '43992'
last_name: Götte
- first_name: Julia
full_name: Timmermann, Julia
id: '15402'
last_name: Timmermann
citation:
ama: 'Götte R-S, Timmermann J. Estimating States and Model Uncertainties Jointly
by a Sparsity Promoting UKF. In: 12th IFAC Symposium on Nonlinear Control Systems
(NOLCOS 2022). Vol 56. ; 2023:85-90. doi:https://doi.org/10.1016/j.ifacol.2023.02.015'
apa: Götte, R.-S., & Timmermann, J. (2023). Estimating States and Model Uncertainties
Jointly by a Sparsity Promoting UKF. 12th IFAC Symposium on Nonlinear Control
Systems (NOLCOS 2022), 56(1), 85–90. https://doi.org/10.1016/j.ifacol.2023.02.015
bibtex: '@inproceedings{Götte_Timmermann_2023, title={Estimating States and Model
Uncertainties Jointly by a Sparsity Promoting UKF}, volume={56}, DOI={https://doi.org/10.1016/j.ifacol.2023.02.015},
number={1}, booktitle={12th IFAC Symposium on Nonlinear Control Systems (NOLCOS
2022)}, author={Götte, Ricarda-Samantha and Timmermann, Julia}, year={2023}, pages={85–90}
}'
chicago: Götte, Ricarda-Samantha, and Julia Timmermann. “Estimating States and Model
Uncertainties Jointly by a Sparsity Promoting UKF.” In 12th IFAC Symposium
on Nonlinear Control Systems (NOLCOS 2022), 56:85–90, 2023. https://doi.org/10.1016/j.ifacol.2023.02.015.
ieee: 'R.-S. Götte and J. Timmermann, “Estimating States and Model Uncertainties
Jointly by a Sparsity Promoting UKF,” in 12th IFAC Symposium on Nonlinear Control
Systems (NOLCOS 2022), Canberra, Australien, 2023, vol. 56, no. 1, pp. 85–90,
doi: https://doi.org/10.1016/j.ifacol.2023.02.015.'
mla: Götte, Ricarda-Samantha, and Julia Timmermann. “Estimating States and Model
Uncertainties Jointly by a Sparsity Promoting UKF.” 12th IFAC Symposium on
Nonlinear Control Systems (NOLCOS 2022), vol. 56, no. 1, 2023, pp. 85–90,
doi:https://doi.org/10.1016/j.ifacol.2023.02.015.
short: 'R.-S. Götte, J. Timmermann, in: 12th IFAC Symposium on Nonlinear Control
Systems (NOLCOS 2022), 2023, pp. 85–90.'
conference:
end_date: 2023-01-06
location: Canberra, Australien
name: 12th IFAC Symposium on Nonlinear Control Systems NOLCOS 2022
start_date: 2023-01-04
date_created: 2022-12-01T07:17:00Z
date_updated: 2024-11-13T08:43:05Z
department:
- _id: '153'
- _id: '880'
doi: https://doi.org/10.1016/j.ifacol.2023.02.015
intvolume: ' 56'
issue: '1'
keyword:
- joint estimation
- unscented transform
- Kalman filter
- sparsity
- data-driven
- compressed sensing
language:
- iso: eng
page: 85-90
publication: 12th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2022)
quality_controlled: '1'
status: public
title: Estimating States and Model Uncertainties Jointly by a Sparsity Promoting UKF
type: conference
user_id: '43992'
volume: 56
year: '2023'
...
---
_id: '10000'
abstract:
- lang: eng
text: Ultraschall wird zur Effizienzsteigerung in verfahrenstechnischen Prozessen
eingesetzt. Die Betriebsparamter der Ultraschallsysteme werden empirisch ermittelt,
da derzeit keine systematische Analyse der Wechselwirkung zwischen Ultraschallwandler
und Schallfeld sowie kein Verfahren zur Messung der Kavitationsaktivität ohne
zusätzlichen Sensor existieren. Auf Basis einer experimentellen Analyse des betrachteten
sonochemischen Reaktors wird ein Finite-Elemente-Modell aufgebaut, das die Wechselwirkung
zwischen Schallfeld und Ultraschallwandler berücksichtigt. Die modellbasierte
Analyse zeigt, dass wegen der akustischen Eigenschaften des Autoklavs nur direkt
an der Sonotrode Kavitation entsteht. Die Wechselwirkung zwischen Ultraschallwandler
und Schallfeld ermöglicht Aussagen über das Schallfeld und die Kavitationsaktivität
auf Basis der Rückwirkung auf den Ultraschallwandler. Die lineare Schalldruckverteilung
ermöglicht eine Prognose über die Verteilung von Kavitationszonen. Das beschriebene
Modell liefert wertvolle Erkenntnisse für die Auslegung, Analyse und Skalierung
sonochemischer Reaktoren. Auf Grund der rauen Prozessrandbedingungen ist die Applikation
von Sensoren zur Überwachung der Kavitationsaktivität in vielen sonochemischen
Prozessen nicht möglich. Zur prozessbegleitenden Messung der Kavitationsaktivität
wird ein Verfahren entwickelt, das die Bewertung der Kavitationsaktivität durch
Auswertung der Rückwirkung auf den Ultraschallwandler erlaubt. Das Messverfahren
ermöglicht eine vorhersagbare und reproduzierbare Durchführung kavitationsbasierter
Prozesse und stellt eine wichtige Erweiterung für bestehende und neue Ultraschallsysteme
dar.
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
citation:
ama: Bornmann P. Modellierung Und Experimentelle Charakterisierung Der Wechselwirkung
Zwischen Ultraschallwandler Und Flüssigkeit in Kavitationsbasierten Prozessen.
Shaker; 2019.
apa: Bornmann, P. (2019). Modellierung und experimentelle Charakterisierung der
Wechselwirkung zwischen Ultraschallwandler und Flüssigkeit in kavitationsbasierten
Prozessen. Shaker.
bibtex: '@book{Bornmann_2019, title={Modellierung und experimentelle Charakterisierung
der Wechselwirkung zwischen Ultraschallwandler und Flüssigkeit in kavitationsbasierten
Prozessen}, publisher={Shaker}, author={Bornmann, Peter}, year={2019} }'
chicago: Bornmann, Peter. Modellierung Und Experimentelle Charakterisierung Der
Wechselwirkung Zwischen Ultraschallwandler Und Flüssigkeit in Kavitationsbasierten
Prozessen. Shaker, 2019.
ieee: P. Bornmann, Modellierung und experimentelle Charakterisierung der Wechselwirkung
zwischen Ultraschallwandler und Flüssigkeit in kavitationsbasierten Prozessen.
Shaker, 2019.
mla: Bornmann, Peter. Modellierung Und Experimentelle Charakterisierung Der Wechselwirkung
Zwischen Ultraschallwandler Und Flüssigkeit in Kavitationsbasierten Prozessen.
Shaker, 2019.
short: P. Bornmann, Modellierung Und Experimentelle Charakterisierung Der Wechselwirkung
Zwischen Ultraschallwandler Und Flüssigkeit in Kavitationsbasierten Prozessen,
Shaker, 2019.
date_created: 2019-05-27T10:29:53Z
date_updated: 2023-09-15T12:23:55Z
department:
- _id: '151'
keyword:
- Sonochemie
- Akustische Kavitation
- Kavitationsmessung
- Kavitationsdetektion
- FEM-Simulation Ultraschallwandler
- Prozessüberwachung
- FEM-Simulation Schallfeld
- Self-Sensing
- Piezoelektrische Ultraschallwandler
- Ultraschallreinigung
language:
- iso: eng
publisher: Shaker
status: public
title: Modellierung und experimentelle Charakterisierung der Wechselwirkung zwischen
Ultraschallwandler und Flüssigkeit in kavitationsbasierten Prozessen
type: dissertation
user_id: '210'
year: '2019'
...
---
_id: '59220'
author:
- first_name: Tobias
full_name: Schwabe, Tobias
id: '39217'
last_name: Schwabe
- first_name: Axel
full_name: Balke, Axel
last_name: Balke
- first_name: Petrone H.
full_name: Bezuidenhout, Petrone H.
last_name: Bezuidenhout
- first_name: Julia
full_name: Reker, Julia
last_name: Reker
- first_name: Thorsten
full_name: Meyers, Thorsten
last_name: Meyers
- first_name: Trudi-Heleen
full_name: Joubert, Trudi-Heleen
last_name: Joubert
- first_name: Ulrich
full_name: Hilleringmann, Ulrich
id: '20179'
last_name: Hilleringmann
citation:
ama: 'Schwabe T, Balke A, Bezuidenhout PH, et al. Oxygen detection with zinc oxide
nanoparticle structures. In: du Plessis M, ed. Fifth Conference on Sensors,
MEMS, and Electro-Optic Systems. Vol 11043. SPIE; 2019:1104316. doi:10.1117/12.2501507'
apa: Schwabe, T., Balke, A., Bezuidenhout, P. H., Reker, J., Meyers, T., Joubert,
T.-H., & Hilleringmann, U. (2019). Oxygen detection with zinc oxide nanoparticle
structures. In M. du Plessis (Ed.), Fifth Conference on Sensors, MEMS, and
Electro-Optic Systems (Vol. 11043, p. 1104316). SPIE. https://doi.org/10.1117/12.2501507
bibtex: '@inproceedings{Schwabe_Balke_Bezuidenhout_Reker_Meyers_Joubert_Hilleringmann_2019,
title={Oxygen detection with zinc oxide nanoparticle structures}, volume={11043},
DOI={10.1117/12.2501507}, booktitle={Fifth
Conference on Sensors, MEMS, and Electro-Optic Systems}, publisher={SPIE}, author={Schwabe,
Tobias and Balke, Axel and Bezuidenhout, Petrone H. and Reker, Julia and Meyers,
Thorsten and Joubert, Trudi-Heleen and Hilleringmann, Ulrich}, editor={du Plessis,
Monuko}, year={2019}, pages={1104316} }'
chicago: Schwabe, Tobias, Axel Balke, Petrone H. Bezuidenhout, Julia Reker, Thorsten
Meyers, Trudi-Heleen Joubert, and Ulrich Hilleringmann. “Oxygen Detection with
Zinc Oxide Nanoparticle Structures.” In Fifth Conference on Sensors, MEMS,
and Electro-Optic Systems, edited by Monuko du Plessis, 11043:1104316. SPIE,
2019. https://doi.org/10.1117/12.2501507.
ieee: 'T. Schwabe et al., “Oxygen detection with zinc oxide nanoparticle
structures,” in Fifth Conference on Sensors, MEMS, and Electro-Optic Systems,
2019, vol. 11043, p. 1104316, doi: 10.1117/12.2501507.'
mla: Schwabe, Tobias, et al. “Oxygen Detection with Zinc Oxide Nanoparticle Structures.”
Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, edited by
Monuko du Plessis, vol. 11043, SPIE, 2019, p. 1104316, doi:10.1117/12.2501507.
short: 'T. Schwabe, A. Balke, P.H. Bezuidenhout, J. Reker, T. Meyers, T.-H. Joubert,
U. Hilleringmann, in: M. du Plessis (Ed.), Fifth Conference on Sensors, MEMS,
and Electro-Optic Systems, SPIE, 2019, p. 1104316.'
date_created: 2025-03-31T16:06:43Z
date_updated: 2025-04-02T11:34:07Z
doi: 10.1117/12.2501507
editor:
- first_name: Monuko
full_name: du Plessis, Monuko
last_name: du Plessis
intvolume: ' 11043'
keyword:
- sensing
- zinc oxide
- thin-film transistor
- oxygen measurement
- low-cost electronics
- water quality analysis
- printable electronics
- flexible electronics
language:
- iso: eng
page: '1104316'
publication: Fifth Conference on Sensors, MEMS, and Electro-Optic Systems
publisher: SPIE
status: public
title: Oxygen detection with zinc oxide nanoparticle structures
type: conference
user_id: '39217'
volume: 11043
year: '2019'
...
---
_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: IEEE Transactions on Reliability.
; 2017:1-10. doi:10.1109/TR.2017.2710260'
apa: Kimotho, J. K., Sextro, W., & Hemsel, T. (2017). Estimation of Remaining
Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing. In IEEE
Transactions on Reliability (pp. 1–10). https://doi.org/10.1109/TR.2017.2710260
bibtex: '@inproceedings{Kimotho_Sextro_Hemsel_2017, title={Estimation of Remaining
Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing}, DOI={10.1109/TR.2017.2710260},
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 IEEE Transactions on Reliability, 1–10, 2017. https://doi.org/10.1109/TR.2017.2710260.
ieee: J. K. Kimotho, W. Sextro, and T. Hemsel, “Estimation of Remaining Useful Lifetime
of Piezoelectric Transducers Based on Self-Sensing,” 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.” IEEE Transactions on Reliability, 2017,
pp. 1–10, doi:10.1109/TR.2017.2710260.
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: '9944'
abstract:
- lang: eng
text: Eine Vielzahl von Prozessen in der Chemie und Verfahrenstechnik kann durch
Ultraschall positiv beeinflusst werden. Oftmals ist ultraschallinduzierte Kavitation
der Hauptwirkmechanismus für die positiven Effekte der Beschallung. Daher ist
es notwendig die Kavitationsaktivität während des Prozesses zu quantifizieren
um die Beschallung für den jeweiligen Prozess optimal gestalten und überwachen
zu können. Eine Möglichkeit der prozessbegleitenden Kavitationsdetektion ist die
Auswertung der akustischen Emissionen von oszillierenden und kollabierenden Kavitationsblasen
mittels Drucksensoren in der Flüssigkeit. Raue Prozessrandbedingungen wie hohe
Temperaturen oder aggressive Flüssigkeiten erschweren es jedoch geeignete Sensoren
zu finden. Als Alternative wurde daher die Nutzbarkeit der Rückwirkung von Kavitationsereignissen
auf das elektrische Eingansgssignal des Ultraschallwandlers zur Quantifizierung
von Kavitation untersucht. Die experimentelle Analyse hat ergeben, dass das Einsetzen
und in einigen Fällen auch die Art der Kavitation auf Basis der Rückwirkung auf
das Stromsignal des Ultraschallwandlers bestimmt werden kann. Die Stärke der Kavitation
war hingegen nicht aus den Stromsignalen abzuleiten.
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Gianluca
full_name: Memoli, Gianluca
last_name: Memoli
- first_name: Mark
full_name: Hodnett, Mark
last_name: Hodnett
- first_name: Bajram
full_name: Zeqiri, Bajram
last_name: Zeqiri
citation:
ama: Bornmann P, Hemsel T, Sextro W, Memoli G, Hodnett M, Zeqiri B. Kavitationsdetektion
mittels Self-Sensing-Ultraschallwandler. tm - Technisches Messen. 2015;82(2):73-84.
doi:10.1515/teme-2015-0017
apa: Bornmann, P., Hemsel, T., Sextro, W., Memoli, G., Hodnett, M., & Zeqiri,
B. (2015). Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler. Tm
- Technisches Messen, 82(2), 73–84. https://doi.org/10.1515/teme-2015-0017
bibtex: '@article{Bornmann_Hemsel_Sextro_Memoli_Hodnett_Zeqiri_2015, title={Kavitationsdetektion
mittels Self-Sensing-Ultraschallwandler}, volume={82}, DOI={10.1515/teme-2015-0017},
number={2}, journal={tm - Technisches Messen}, author={Bornmann, Peter and Hemsel,
Tobias and Sextro, Walter and Memoli, Gianluca and Hodnett, Mark and Zeqiri, Bajram},
year={2015}, pages={73–84} }'
chicago: 'Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett,
and Bajram Zeqiri. “Kavitationsdetektion Mittels Self-Sensing-Ultraschallwandler.”
Tm - Technisches Messen 82, no. 2 (2015): 73–84. https://doi.org/10.1515/teme-2015-0017.'
ieee: P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, and B. Zeqiri, “Kavitationsdetektion
mittels Self-Sensing-Ultraschallwandler,” tm - Technisches Messen, vol.
82, no. 2, pp. 73–84, 2015.
mla: Bornmann, Peter, et al. “Kavitationsdetektion Mittels Self-Sensing-Ultraschallwandler.”
Tm - Technisches Messen, vol. 82, no. 2, 2015, pp. 73–84, doi:10.1515/teme-2015-0017.
short: P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, B. Zeqiri, Tm -
Technisches Messen 82 (2015) 73–84.
date_created: 2019-05-27T08:13:40Z
date_updated: 2019-09-16T10:44:38Z
department:
- _id: '151'
doi: 10.1515/teme-2015-0017
intvolume: ' 82'
issue: '2'
keyword:
- Kavitationsdetektion
- Self-Sensing
- So- nochemie
- Ultraschallwandler
language:
- iso: eng
page: 73-84
popular_science: '1'
publication: tm - Technisches Messen
status: public
title: Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler
type: journal_article
user_id: '55222'
volume: 82
year: '2015'
...
---
_id: '17661'
author:
- first_name: Thomas C.
full_name: King, Thomas C.
last_name: King
- first_name: Qingzhi
full_name: Liu, Qingzhi
last_name: Liu
- first_name: Gleb
full_name: Polevoy, Gleb
id: '83983'
last_name: Polevoy
- first_name: Mathijs
full_name: de Weerdt, Mathijs
last_name: de Weerdt
- first_name: Virginia
full_name: Dignum, Virginia
last_name: Dignum
- first_name: M. Birna
full_name: van Riemsdijk, M. Birna
last_name: van Riemsdijk
- first_name: Martijn
full_name: Warnier, Martijn
last_name: Warnier
citation:
ama: 'King TC, Liu Q, Polevoy G, et al. Request Driven Social Sensing. In: Proceedings
of the 2014 International Conference on Autonomous Agents and Multi-Agent Systems.
AAMAS ’14. Richland, SC: International Foundation for Autonomous Agents and Multiagent
Systems; 2014:1651-1652.'
apa: 'King, T. C., Liu, Q., Polevoy, G., de Weerdt, M., Dignum, V., van Riemsdijk,
M. B., & Warnier, M. (2014). Request Driven Social Sensing. In Proceedings
of the 2014 International Conference on Autonomous Agents and Multi-agent Systems
(pp. 1651–1652). Richland, SC: International Foundation for Autonomous Agents
and Multiagent Systems.'
bibtex: '@inproceedings{King_Liu_Polevoy_de Weerdt_Dignum_van Riemsdijk_Warnier_2014,
place={Richland, SC}, series={AAMAS ’14}, title={Request Driven Social Sensing},
booktitle={Proceedings of the 2014 International Conference on Autonomous Agents
and Multi-agent Systems}, publisher={International Foundation for Autonomous Agents
and Multiagent Systems}, author={King, Thomas C. and Liu, Qingzhi and Polevoy,
Gleb and de Weerdt, Mathijs and Dignum, Virginia and van Riemsdijk, M. Birna and
Warnier, Martijn}, year={2014}, pages={1651–1652}, collection={AAMAS ’14} }'
chicago: 'King, Thomas C., Qingzhi Liu, Gleb Polevoy, Mathijs de Weerdt, Virginia
Dignum, M. Birna van Riemsdijk, and Martijn Warnier. “Request Driven Social Sensing.”
In Proceedings of the 2014 International Conference on Autonomous Agents and
Multi-Agent Systems, 1651–52. AAMAS ’14. Richland, SC: International Foundation
for Autonomous Agents and Multiagent Systems, 2014.'
ieee: T. C. King et al., “Request Driven Social Sensing,” in Proceedings
of the 2014 International Conference on Autonomous Agents and Multi-agent Systems,
2014, pp. 1651–1652.
mla: King, Thomas C., et al. “Request Driven Social Sensing.” Proceedings of
the 2014 International Conference on Autonomous Agents and Multi-Agent Systems,
International Foundation for Autonomous Agents and Multiagent Systems, 2014, pp.
1651–52.
short: 'T.C. King, Q. Liu, G. Polevoy, M. de Weerdt, V. Dignum, M.B. van Riemsdijk,
M. Warnier, in: Proceedings of the 2014 International Conference on Autonomous
Agents and Multi-Agent Systems, International Foundation for Autonomous Agents
and Multiagent Systems, Richland, SC, 2014, pp. 1651–1652.'
date_created: 2020-08-06T15:21:45Z
date_updated: 2022-01-06T06:53:16Z
department:
- _id: '63'
- _id: '541'
extern: '1'
keyword:
- crowd-sensing
- crowdsourcing
- data aggregation
- game theory
- norms
- reciprocation
- self interested agents
- simulation
language:
- iso: eng
page: 1651-1652
place: Richland, SC
publication: Proceedings of the 2014 International Conference on Autonomous Agents
and Multi-agent Systems
publication_identifier:
isbn:
- 978-1-4503-2738-1
publisher: International Foundation for Autonomous Agents and Multiagent Systems
series_title: AAMAS '14
status: public
title: Request Driven Social Sensing
type: conference
user_id: '83983'
year: '2014'
...
---
_id: '9783'
abstract:
- lang: eng
text: To optimize the ultrasound irradiation for cavitation based ultrasound applications
like sonochemistry or ultrasound cleaning, the correlation between cavitation
intensity and the resulting effect on the process is of interest. Furthermore,
changing conditions like temperature and pressure result in varying acoustic properties
of the liquid. That might necessitate an adaption of the ultrasound irradiation.
To detect such changes during operation, process monitoring is desired. Labor
intensive processes, that might be carried out for several hours, also require
process monitoring to increase their reliability by detection of changes or malfunctions
during operation. In some applications cavitation detection and monitoring can
be achieved by the application of sensors in the sound field. Though the application
of sensors is possible, this necessitates modifications on the system and the
sensor might disturb the sound field. In other applications harsh, process conditions
prohibit the application of sensors in the sound field. Therefore alternative
techniques for cavitation detection and monitoring are desired. The applicability
of an external microphone and a self-sensing ultrasound transducer for cavitation
detection were experimentally investigated. Both methods were found to be suitable
and easily applicable.
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: 'Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation
detection / monitoring in sonochemical reactors. In: Ultrasonics Symposium
(IUS), 2012 IEEE International. ; 2012:1141-1144. doi:10.1109/ULTSYM.2012.0284'
apa: Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., & Morita, T. (2012). Non-perturbing
cavitation detection / monitoring in sonochemical reactors. In Ultrasonics
Symposium (IUS), 2012 IEEE International (pp. 1141–1144). https://doi.org/10.1109/ULTSYM.2012.0284
bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing
cavitation detection / monitoring in sonochemical reactors}, DOI={10.1109/ULTSYM.2012.0284},
booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann,
Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi},
year={2012}, pages={1141–1144} }'
chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi
Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.”
In Ultrasonics Symposium (IUS), 2012 IEEE International, 1141–44, 2012.
https://doi.org/10.1109/ULTSYM.2012.0284.
ieee: P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing
cavitation detection / monitoring in sonochemical reactors,” in Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.
mla: Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in
Sonochemical Reactors.” Ultrasonics Symposium (IUS), 2012 IEEE International,
2012, pp. 1141–44, doi:10.1109/ULTSYM.2012.0284.
short: 'P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.'
date_created: 2019-05-13T13:18:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0284
keyword:
- cavitation
- chemical reactors
- microphones
- process monitoring
- reliability
- ultrasonic applications
- ultrasonic waves
- acoustic properties
- cavitation based ultrasound applications
- cavitation intensity
- change detection reliability
- external microphone
- malfunction detection reliability
- nonperturbing cavitation detection
- nonperturbing cavitation monitoring
- process monitoring
- self-sensing ultrasound transducer
- sonochemical reactors
- sonochemistry
- ultrasound cleaning
- ultrasound irradiation
- Acoustics
- Liquids
- Monitoring
- Sensors
- Sonar equipment
- Transducers
- Ultrasonic imaging
language:
- iso: eng
page: 1141-1144
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Non-perturbing cavitation detection / monitoring in sonochemical reactors
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '11806'
abstract:
- lang: eng
text: Microphone arrays represent the basis for many challenging acoustic sensing
tasks. The accuracy of techniques like beamforming directly depends on a precise
knowledge of the relative positions of the sensors used. Unfortunately, for certain
use cases manually measuring the geometry of an array is not feasible due to practical
constraints. In this paper we present an approach to unsupervised shape calibration
of microphone array networks. We developed a hierarchical procedure that first
performs local shape calibration based on coherence analysis and then employs
SRP-PHAT in a network calibration method. Practical experiments demonstrate the
effectiveness of our approach especially for highly reverberant acoustic environments.
author:
- first_name: Marius
full_name: Hennecke, Marius
last_name: Hennecke
- first_name: Thomas
full_name: Ploetz, Thomas
last_name: Ploetz
- first_name: Gernot A.
full_name: Fink, Gernot A.
last_name: Fink
- first_name: Joerg
full_name: Schmalenstroeer, Joerg
id: '460'
last_name: Schmalenstroeer
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Hennecke M, Ploetz T, Fink GA, Schmalenstroeer J, Haeb-Umbach R. A hierarchical
approach to unsupervised shape calibration of microphone array networks. In: IEEE/SP
15th Workshop on Statistical Signal Processing (SSP 2009). ; 2009:257-260.
doi:10.1109/SSP.2009.5278589'
apa: Hennecke, M., Ploetz, T., Fink, G. A., Schmalenstroeer, J., & Haeb-Umbach,
R. (2009). A hierarchical approach to unsupervised shape calibration of microphone
array networks. IEEE/SP 15th Workshop on Statistical Signal Processing (SSP
2009), 257–260. https://doi.org/10.1109/SSP.2009.5278589
bibtex: '@inproceedings{Hennecke_Ploetz_Fink_Schmalenstroeer_Haeb-Umbach_2009, title={A
hierarchical approach to unsupervised shape calibration of microphone array networks},
DOI={10.1109/SSP.2009.5278589},
booktitle={IEEE/SP 15th Workshop on Statistical Signal Processing (SSP 2009)},
author={Hennecke, Marius and Ploetz, Thomas and Fink, Gernot A. and Schmalenstroeer,
Joerg and Haeb-Umbach, Reinhold}, year={2009}, pages={257–260} }'
chicago: Hennecke, Marius, Thomas Ploetz, Gernot A. Fink, Joerg Schmalenstroeer,
and Reinhold Haeb-Umbach. “A Hierarchical Approach to Unsupervised Shape Calibration
of Microphone Array Networks.” In IEEE/SP 15th Workshop on Statistical Signal
Processing (SSP 2009), 257–60, 2009. https://doi.org/10.1109/SSP.2009.5278589.
ieee: 'M. Hennecke, T. Ploetz, G. A. Fink, J. Schmalenstroeer, and R. Haeb-Umbach,
“A hierarchical approach to unsupervised shape calibration of microphone array
networks,” in IEEE/SP 15th Workshop on Statistical Signal Processing (SSP 2009),
2009, pp. 257–260, doi: 10.1109/SSP.2009.5278589.'
mla: Hennecke, Marius, et al. “A Hierarchical Approach to Unsupervised Shape Calibration
of Microphone Array Networks.” IEEE/SP 15th Workshop on Statistical Signal
Processing (SSP 2009), 2009, pp. 257–60, doi:10.1109/SSP.2009.5278589.
short: 'M. Hennecke, T. Ploetz, G.A. Fink, J. Schmalenstroeer, R. Haeb-Umbach, in:
IEEE/SP 15th Workshop on Statistical Signal Processing (SSP 2009), 2009, pp. 257–260.'
date_created: 2019-07-12T05:28:37Z
date_updated: 2023-10-26T08:09:22Z
department:
- _id: '54'
doi: 10.1109/SSP.2009.5278589
keyword:
- acoustic sensing tasks
- array geometry
- calibration
- coherence analysis
- hierarchical procedure
- local shape calibration
- microphone array networks
- microphone arrays
- network calibration method
- sensor arrays
- SRP-PHAT
- unsupervised shape calibration
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2009/HePlFiScHa09.pdf
oa: '1'
page: 257-260
publication: IEEE/SP 15th Workshop on Statistical Signal Processing (SSP 2009)
quality_controlled: '1'
status: public
title: A hierarchical approach to unsupervised shape calibration of microphone array
networks
type: conference
user_id: '460'
year: '2009'
...