---
_id: '11822'
author:
- first_name: Valentin
full_name: Ion, Valentin
last_name: Ion
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Ion V, Haeb-Umbach R. Multi-Resolution Soft Features for Channel-Robust Distributed
Speech Recognition. In: Interspeech 2007. ; 2007.'
apa: Ion, V., & Haeb-Umbach, R. (2007). Multi-Resolution Soft Features for Channel-Robust
Distributed Speech Recognition. In Interspeech 2007.
bibtex: '@inproceedings{Ion_Haeb-Umbach_2007, title={Multi-Resolution Soft Features
for Channel-Robust Distributed Speech Recognition}, booktitle={Interspeech 2007},
author={Ion, Valentin and Haeb-Umbach, Reinhold}, year={2007} }'
chicago: Ion, Valentin, and Reinhold Haeb-Umbach. “Multi-Resolution Soft Features
for Channel-Robust Distributed Speech Recognition.” In Interspeech 2007,
2007.
ieee: V. Ion and R. Haeb-Umbach, “Multi-Resolution Soft Features for Channel-Robust
Distributed Speech Recognition,” in Interspeech 2007, 2007.
mla: Ion, Valentin, and Reinhold Haeb-Umbach. “Multi-Resolution Soft Features for
Channel-Robust Distributed Speech Recognition.” Interspeech 2007, 2007.
short: 'V. Ion, R. Haeb-Umbach, in: Interspeech 2007, 2007.'
date_created: 2019-07-12T05:28:55Z
date_updated: 2022-01-06T06:51:10Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2007/IoHa07.pdf
oa: '1'
publication: Interspeech 2007
status: public
title: Multi-Resolution Soft Features for Channel-Robust Distributed Speech Recognition
type: conference
user_id: '44006'
year: '2007'
...
---
_id: '11883'
abstract:
- lang: eng
text: In this paper, we experimentally evaluate algorithms for velocity estimation
of a GSM 900 mobile terminal which are based on the analysis of the statistical
properties of the fast fading process. It is shown how theses statistics can be
obtained from the training sequences present in downlink transmission bursts without
establishing an active connection. Realistic simulations of a GSM channel according
to the COST 207 channel models have been conducted. These models incorporate effects
like multipath propagation, fading, cochannel interference and additive noise.
It is shown that velocity estimation by searching for the maximum slope of the
power density spectrum of the fast fading performs best.
author:
- first_name: Sven
full_name: Peschke, Sven
last_name: Peschke
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Peschke S, Haeb-Umbach R. Velocity Estimation of Mobile Terminals by Exploiting
GSM Downlink Signalling. In: 4th Workshop on Positioning Navigation and Communication
(WPNC 2007). ; 2007:217-222. doi:10.1109/WPNC.2007.353637'
apa: Peschke, S., & Haeb-Umbach, R. (2007). Velocity Estimation of Mobile Terminals
by Exploiting GSM Downlink Signalling. In 4th Workshop on Positioning Navigation
and Communication (WPNC 2007) (pp. 217–222). https://doi.org/10.1109/WPNC.2007.353637
bibtex: '@inproceedings{Peschke_Haeb-Umbach_2007, title={Velocity Estimation of
Mobile Terminals by Exploiting GSM Downlink Signalling}, DOI={10.1109/WPNC.2007.353637},
booktitle={4th Workshop on Positioning Navigation and Communication (WPNC 2007)},
author={Peschke, Sven and Haeb-Umbach, Reinhold}, year={2007}, pages={217–222}
}'
chicago: Peschke, Sven, and Reinhold Haeb-Umbach. “Velocity Estimation of Mobile
Terminals by Exploiting GSM Downlink Signalling.” In 4th Workshop on Positioning
Navigation and Communication (WPNC 2007), 217–22, 2007. https://doi.org/10.1109/WPNC.2007.353637.
ieee: S. Peschke and R. Haeb-Umbach, “Velocity Estimation of Mobile Terminals by
Exploiting GSM Downlink Signalling,” in 4th Workshop on Positioning Navigation
and Communication (WPNC 2007), 2007, pp. 217–222.
mla: Peschke, Sven, and Reinhold Haeb-Umbach. “Velocity Estimation of Mobile Terminals
by Exploiting GSM Downlink Signalling.” 4th Workshop on Positioning Navigation
and Communication (WPNC 2007), 2007, pp. 217–22, doi:10.1109/WPNC.2007.353637.
short: 'S. Peschke, R. Haeb-Umbach, in: 4th Workshop on Positioning Navigation and
Communication (WPNC 2007), 2007, pp. 217–222.'
date_created: 2019-07-12T05:30:06Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/WPNC.2007.353637
keyword:
- additive noise
- cellular radio
- channel estimation
- cochannel interference
- COST 207 channel models
- downlink transmission bursts
- fading channels
- fading process
- GSM downlink signalling
- mobile terminals
- multipath channels
- multipath propagation
- power density spectrum
- statistical analysis
- statistical properties
- telecommunication links
- telecommunication terminals
- velocity estimation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2007/PeHa07.pdf
oa: '1'
page: 217-222
publication: 4th Workshop on Positioning Navigation and Communication (WPNC 2007)
status: public
title: Velocity Estimation of Mobile Terminals by Exploiting GSM Downlink Signalling
type: conference
user_id: '44006'
year: '2007'
...
---
_id: '11927'
abstract:
- lang: eng
text: Maximizing the output signal-to-noise ratio (SNR) of a sensor array in the
presence of spatially colored noise leads to a generalized eigenvalue problem.
While this approach has extensively been employed in narrowband (antenna) array
beamforming, it is typically not used for broadband (microphone) array beamforming
due to the uncontrolled amount of speech distortion introduced by a narrowband
SNR criterion. In this paper, we show how the distortion of the desired signal
can be controlled by a single-channel post-filter, resulting in a performance
comparable to the generalized minimum variance distortionless response beamformer,
where arbitrary transfer functions relate the source and the microphones. Results
are given both for directional and diffuse noise. A novel gradient ascent adaptation
algorithm is presented, and its good convergence properties are experimentally
revealed by comparison with alternatives from the literature. A key feature of
the proposed beamformer is that it operates blindly, i.e., it neither requires
knowledge about the array geometry nor an explicit estimation of the transfer
functions from source to sensors or the direction-of-arrival.
author:
- first_name: Ernst
full_name: Warsitz, Ernst
last_name: Warsitz
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Warsitz E, Haeb-Umbach R. Blind Acoustic Beamforming Based on Generalized Eigenvalue
Decomposition. IEEE Transactions on Audio, Speech, and Language Processing.
2007;15(5):1529-1539. doi:10.1109/TASL.2007.898454
apa: Warsitz, E., & Haeb-Umbach, R. (2007). Blind Acoustic Beamforming Based
on Generalized Eigenvalue Decomposition. IEEE Transactions on Audio, Speech,
and Language Processing, 15(5), 1529–1539. https://doi.org/10.1109/TASL.2007.898454
bibtex: '@article{Warsitz_Haeb-Umbach_2007, title={Blind Acoustic Beamforming Based
on Generalized Eigenvalue Decomposition}, volume={15}, DOI={10.1109/TASL.2007.898454},
number={5}, journal={IEEE Transactions on Audio, Speech, and Language Processing},
author={Warsitz, Ernst and Haeb-Umbach, Reinhold}, year={2007}, pages={1529–1539}
}'
chicago: 'Warsitz, Ernst, and Reinhold Haeb-Umbach. “Blind Acoustic Beamforming
Based on Generalized Eigenvalue Decomposition.” IEEE Transactions on Audio,
Speech, and Language Processing 15, no. 5 (2007): 1529–39. https://doi.org/10.1109/TASL.2007.898454.'
ieee: E. Warsitz and R. Haeb-Umbach, “Blind Acoustic Beamforming Based on Generalized
Eigenvalue Decomposition,” IEEE Transactions on Audio, Speech, and Language
Processing, vol. 15, no. 5, pp. 1529–1539, 2007.
mla: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Blind Acoustic Beamforming Based
on Generalized Eigenvalue Decomposition.” IEEE Transactions on Audio, Speech,
and Language Processing, vol. 15, no. 5, 2007, pp. 1529–39, doi:10.1109/TASL.2007.898454.
short: E. Warsitz, R. Haeb-Umbach, IEEE Transactions on Audio, Speech, and Language
Processing 15 (2007) 1529–1539.
date_created: 2019-07-12T05:30:57Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
doi: 10.1109/TASL.2007.898454
intvolume: ' 15'
issue: '5'
keyword:
- acoustic signal processing
- arbitrary transfer function
- array signal processing
- blind acoustic beamforming
- direction-of-arrival
- direction-of-arrival estimation
- eigenvalues and eigenfunctions
- generalized eigenvalue decomposition
- gradient ascent adaptation algorithm
- microphone arrays
- microphones
- narrowband array beamforming
- sensor array
- single-channel post-filter
- spatially colored noise
- transfer functions
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2007/WaHa07.pdf
oa: '1'
page: 1529-1539
publication: IEEE Transactions on Audio, Speech, and Language Processing
status: public
title: Blind Acoustic Beamforming Based on Generalized Eigenvalue Decomposition
type: journal_article
user_id: '44006'
volume: 15
year: '2007'
...
---
_id: '11934'
author:
- first_name: Ernst
full_name: Warsitz, Ernst
last_name: Warsitz
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
- first_name: Dang Hai
full_name: Tran Vu, Dang Hai
last_name: Tran Vu
citation:
ama: 'Warsitz E, Haeb-Umbach R, Tran Vu DH. Blind Adaptive Principal Eigenvector
Beamforming for Acoustical Source Separation. In: Interspeech 2007. ; 2007.'
apa: Warsitz, E., Haeb-Umbach, R., & Tran Vu, D. H. (2007). Blind Adaptive Principal
Eigenvector Beamforming for Acoustical Source Separation. In Interspeech 2007.
bibtex: '@inproceedings{Warsitz_Haeb-Umbach_Tran Vu_2007, title={Blind Adaptive
Principal Eigenvector Beamforming for Acoustical Source Separation}, booktitle={Interspeech
2007}, author={Warsitz, Ernst and Haeb-Umbach, Reinhold and Tran Vu, Dang Hai},
year={2007} }'
chicago: Warsitz, Ernst, Reinhold Haeb-Umbach, and Dang Hai Tran Vu. “Blind Adaptive
Principal Eigenvector Beamforming for Acoustical Source Separation.” In Interspeech
2007, 2007.
ieee: E. Warsitz, R. Haeb-Umbach, and D. H. Tran Vu, “Blind Adaptive Principal Eigenvector
Beamforming for Acoustical Source Separation,” in Interspeech 2007, 2007.
mla: Warsitz, Ernst, et al. “Blind Adaptive Principal Eigenvector Beamforming for
Acoustical Source Separation.” Interspeech 2007, 2007.
short: 'E. Warsitz, R. Haeb-Umbach, D.H. Tran Vu, in: Interspeech 2007, 2007.'
date_created: 2019-07-12T05:31:05Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2007/WaHaDa07.pdf
oa: '1'
publication: Interspeech 2007
status: public
title: Blind Adaptive Principal Eigenvector Beamforming for Acoustical Source Separation
type: conference
user_id: '44006'
year: '2007'
...
---
_id: '11941'
author:
- first_name: Stefan
full_name: Windmann, Stefan
last_name: Windmann
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Windmann S, Haeb-Umbach R. An Approach to Iterative Speech Feature Enhancement
and Recognition. In: Interspeech 2007. ; 2007.'
apa: Windmann, S., & Haeb-Umbach, R. (2007). An Approach to Iterative Speech
Feature Enhancement and Recognition. In Interspeech 2007.
bibtex: '@inproceedings{Windmann_Haeb-Umbach_2007, title={An Approach to Iterative
Speech Feature Enhancement and Recognition}, booktitle={Interspeech 2007}, author={Windmann,
Stefan and Haeb-Umbach, Reinhold}, year={2007} }'
chicago: Windmann, Stefan, and Reinhold Haeb-Umbach. “An Approach to Iterative Speech
Feature Enhancement and Recognition.” In Interspeech 2007, 2007.
ieee: S. Windmann and R. Haeb-Umbach, “An Approach to Iterative Speech Feature Enhancement
and Recognition,” in Interspeech 2007, 2007.
mla: Windmann, Stefan, and Reinhold Haeb-Umbach. “An Approach to Iterative Speech
Feature Enhancement and Recognition.” Interspeech 2007, 2007.
short: 'S. Windmann, R. Haeb-Umbach, in: Interspeech 2007, 2007.'
date_created: 2019-07-12T05:31:13Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2007/WiHa07.pdf
oa: '1'
publication: Interspeech 2007
status: public
title: An Approach to Iterative Speech Feature Enhancement and Recognition
type: conference
user_id: '44006'
year: '2007'
...
---
_id: '12051'
author:
- first_name: Christoph
full_name: Sommer, Christoph
id: '49154'
last_name: Sommer
orcid: 0000-0002-4336-7350
- first_name: Falko
full_name: Dressler, Falko
last_name: Dressler
citation:
ama: 'Sommer C, Dressler F. The DYMO Routing Protocol in VANET Scenarios. In: 2007
IEEE 66th Vehicular Technology Conference. ; 2007. doi:10.1109/vetecf.2007.20'
apa: Sommer, C., & Dressler, F. (2007). The DYMO Routing Protocol in VANET Scenarios.
In 2007 IEEE 66th Vehicular Technology Conference. https://doi.org/10.1109/vetecf.2007.20
bibtex: '@inproceedings{Sommer_Dressler_2007, title={The DYMO Routing Protocol in
VANET Scenarios}, DOI={10.1109/vetecf.2007.20},
booktitle={2007 IEEE 66th Vehicular Technology Conference}, author={Sommer, Christoph
and Dressler, Falko}, year={2007} }'
chicago: Sommer, Christoph, and Falko Dressler. “The DYMO Routing Protocol in VANET
Scenarios.” In 2007 IEEE 66th Vehicular Technology Conference, 2007. https://doi.org/10.1109/vetecf.2007.20.
ieee: C. Sommer and F. Dressler, “The DYMO Routing Protocol in VANET Scenarios,”
in 2007 IEEE 66th Vehicular Technology Conference, 2007.
mla: Sommer, Christoph, and Falko Dressler. “The DYMO Routing Protocol in VANET
Scenarios.” 2007 IEEE 66th Vehicular Technology Conference, 2007, doi:10.1109/vetecf.2007.20.
short: 'C. Sommer, F. Dressler, in: 2007 IEEE 66th Vehicular Technology Conference,
2007.'
date_created: 2019-07-18T09:54:58Z
date_updated: 2022-01-06T06:51:16Z
department:
- _id: '589'
doi: 10.1109/vetecf.2007.20
language:
- iso: eng
publication: 2007 IEEE 66th Vehicular Technology Conference
publication_identifier:
isbn:
- '9781424402632'
publication_status: published
status: public
title: The DYMO Routing Protocol in VANET Scenarios
type: conference
user_id: '49154'
year: '2007'
...
---
_id: '12941'
author:
- first_name: Johannes
full_name: Kepper, Johannes
last_name: Kepper
- first_name: Daniel
full_name: Röwenstrunk, Daniel
id: '439'
last_name: Röwenstrunk
orcid: https://orcid.org/0000-0001-6271-2095
citation:
ama: Kepper J, Röwenstrunk D. Das Edirom-Projekt. Werkzeuge für digitale Formen
wissenschaftlich-kritischer Musikeditionen. Forum Musikbibliothek. 2007;28(1):36-49.
apa: Kepper, J., & Röwenstrunk, D. (2007). Das Edirom-Projekt. Werkzeuge für
digitale Formen wissenschaftlich-kritischer Musikeditionen. Forum Musikbibliothek,
28(1), 36–49.
bibtex: '@article{Kepper_Röwenstrunk_2007, title={Das Edirom-Projekt. Werkzeuge
für digitale Formen wissenschaftlich-kritischer Musikeditionen}, volume={28},
number={1}, journal={Forum Musikbibliothek}, author={Kepper, Johannes and Röwenstrunk,
Daniel}, year={2007}, pages={36–49} }'
chicago: 'Kepper, Johannes, and Daniel Röwenstrunk. “Das Edirom-Projekt. Werkzeuge
für digitale Formen wissenschaftlich-kritischer Musikeditionen.” Forum Musikbibliothek
28, no. 1 (2007): 36–49.'
ieee: J. Kepper and D. Röwenstrunk, “Das Edirom-Projekt. Werkzeuge für digitale
Formen wissenschaftlich-kritischer Musikeditionen,” Forum Musikbibliothek,
vol. 28, no. 1, pp. 36–49, 2007.
mla: Kepper, Johannes, and Daniel Röwenstrunk. “Das Edirom-Projekt. Werkzeuge für
digitale Formen wissenschaftlich-kritischer Musikeditionen.” Forum Musikbibliothek,
vol. 28, no. 1, 2007, pp. 36–49.
short: J. Kepper, D. Röwenstrunk, Forum Musikbibliothek 28 (2007) 36–49.
date_created: 2019-08-16T16:42:34Z
date_updated: 2022-01-06T06:51:27Z
department:
- _id: '233'
intvolume: ' 28'
issue: '1'
keyword:
- Edirom
- ViFE
language:
- iso: ger
page: 36-49
publication: Forum Musikbibliothek
status: public
title: Das Edirom-Projekt. Werkzeuge für digitale Formen wissenschaftlich-kritischer
Musikeditionen
type: journal_article
user_id: '439'
volume: 28
year: '2007'
...
---
_id: '15335'
author:
- first_name: Bernd
full_name: Henning, Bernd
last_name: Henning
citation:
ama: Henning B. Liquid Analysis Using Acoustical Sensors.
apa: Henning, B. (n.d.). Liquid analysis using acoustical sensors.
bibtex: '@book{Henning, title={Liquid analysis using acoustical sensors}, author={Henning,
Bernd} }'
chicago: Henning, Bernd. Liquid Analysis Using Acoustical Sensors, n.d.
ieee: B. Henning, Liquid analysis using acoustical sensors. .
mla: Henning, Bernd. Liquid Analysis Using Acoustical Sensors.
short: B. Henning, Liquid Analysis Using Acoustical Sensors, n.d.
date_created: 2019-12-17T13:16:14Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
status: public
title: Liquid analysis using acoustical sensors
type: misc
user_id: '15911'
year: '2007'
...
---
_id: '15336'
abstract:
- lang: eng
text: 'Ultraschallsensoren werden heute in der industriellen Messtechnik vielfach
eingesetzt, zum Beispiel für die Durchflussmessung, Füllstandmessung, Konzentrationsanalyse,
zerstörungsfreie Werkstoffdiagnostik und anderes mehr. Dabei wachsen die Anforderungen
hinsichtlich der zu gewährleistenden Messunsicherheit, der Zuverlässigkeit sowie
einer erweiterter Funktionalität ständig. Erreichen lassen sich diese Ziele natürlich
nur mit Hilfe verbesserter Ultraschallsensoren und optimal gestalteter Messanordnungen.
Die permanente Forderung, die Produktentwicklungszeiten sowie die Produktherstellungskosten
deutlich zu minimieren, macht den Einsatz moderner Entwicklungswerkzeuge für das
Sensordesign unumgänglich. '
author:
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Henning B. Schallfeldsimulation Für Die Ultraschallmesstechnik.; 2007:40-42.
apa: Henning, B. (2007). Schallfeldsimulation für die Ultraschallmesstechnik
(pp. 40–42).
bibtex: '@book{Henning_2007, title={Schallfeldsimulation für die Ultraschallmesstechnik},
author={Henning, Bernd}, year={2007}, pages={40–42} }'
chicago: Henning, Bernd. Schallfeldsimulation Für Die Ultraschallmesstechnik,
2007.
ieee: B. Henning, Schallfeldsimulation für die Ultraschallmesstechnik. 2007,
pp. 40–42.
mla: Henning, Bernd. Schallfeldsimulation Für Die Ultraschallmesstechnik.
2007, pp. 40–42.
short: B. Henning, Schallfeldsimulation Für Die Ultraschallmesstechnik, 2007.
date_created: 2019-12-17T13:18:15Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
page: 40-42
status: public
title: Schallfeldsimulation für die Ultraschallmesstechnik
type: misc
user_id: '15911'
year: '2007'
...
---
_id: '15337'
abstract:
- lang: eng
text: The continuous measurement of rheological properties (density and viscosity)
or material properties (concentration of selected substances) of liquid mixtures
in the chemical industry or in the food industry is a great challenge to this
day. Standard chemical sensors are often not suitable for industrial processes
because of their slow sensor response and their limited robustness due to the
direct contact to process media. Ultrasonic sensor systems meet the practical
requirements of a chemical sensor quite well. Current ultrasonic sensor systems
are already widely used as acoustic chemical sensors to measure concentration
of selected substances or to monitor the course of polymerization, crystallization
or fermentation processes. Useable acoustic properties for the characterization
of liquid mixtures are sound velocity, sound absorption and acoustic impedance
in consideration of temperature. This contribution will give a short overview
of the state of the art and several trends for the use of ultrasonic sensor systems
in process applications. Currently there are many activities to use acoustic waveguides
for above mentioned sensor applications. By means of two selected examples (density
measurement and determination of acoustic properties of highly absorbing synthetic
polymers) it will presented new developed measurement principles using acoustic
waveguides.
author:
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
citation:
ama: 'Henning B, Rautenberg J. Acoustical waveguides for sensor applications. In:
; 2007.'
apa: Henning, B., & Rautenberg, J. (2007). Acoustical waveguides for sensor
applications. Presented at the International Congress on Ultrasonics (ICU), Wien.
bibtex: '@inproceedings{Henning_Rautenberg_2007, title={Acoustical waveguides for
sensor applications}, author={Henning, Bernd and Rautenberg, Jens}, year={2007}
}'
chicago: Henning, Bernd, and Jens Rautenberg. “Acoustical Waveguides for Sensor
Applications,” 2007.
ieee: B. Henning and J. Rautenberg, “Acoustical waveguides for sensor applications,”
presented at the International Congress on Ultrasonics (ICU), Wien, 2007.
mla: Henning, Bernd, and Jens Rautenberg. Acoustical Waveguides for Sensor Applications.
2007.
short: 'B. Henning, J. Rautenberg, in: 2007.'
conference:
end_date: 12.04.2007
location: Wien
name: International Congress on Ultrasonics (ICU)
start_date: 09.04.2007
date_created: 2019-12-17T13:20:39Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
status: public
title: Acoustical waveguides for sensor applications
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15338'
abstract:
- lang: eng
text: 'There are a couple of acoustic systems that are well suited for continuous
and reliable concentration measurement of liquids, but the reliability is a great
challenge: Most systems determine the amplitude ratio of deflected ultrasound
bursts at different boundaries as well as the sound velocity of the liquid in
order to calculate its acoustic impedance and therewith its density. The problem
is the sensitivity of variations of reference material properties as well as abrasion
or soiling of the boundaries. This contribution is about a new model-based method
that uses the whole surface of an acoustic waveguide as reference boundary. On
the one hand the integral over a large boundary decreases influence of small boundary
defects. On the other hand it is possible to analyze different modes of sound
in the fluid. This redundancy can be used to increase reliability. The decomposition
of the received signal in its modal components by means of principle component
analysis will be discussed in detail. It will be shown that it is possible to
determine the amplitudes of each mode by means of one measured signal at the end
of the waveguide, even if the transducer and the electronic components are of
very simple kind'
author:
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Rautenberg J, Henning B. Measurement of the acoustic properties of highly
absorbing synthetic polymers. In: Proceedings of the International Congress
on Ultrasonics. ; 2007.'
apa: Rautenberg, J., & Henning, B. (2007). Measurement of the acoustic properties
of highly absorbing synthetic polymers. In Proceedings of the International
Congress on Ultrasonics.
bibtex: '@inproceedings{Rautenberg_Henning_2007, title={Measurement of the acoustic
properties of highly absorbing synthetic polymers}, booktitle={Proceedings of
the International Congress on Ultrasonics}, author={Rautenberg, Jens and Henning,
Bernd}, year={2007} }'
chicago: Rautenberg, Jens, and Bernd Henning. “Measurement of the Acoustic Properties
of Highly Absorbing Synthetic Polymers.” In Proceedings of the International
Congress on Ultrasonics, 2007.
ieee: J. Rautenberg and B. Henning, “Measurement of the acoustic properties of highly
absorbing synthetic polymers,” in Proceedings of the International Congress
on Ultrasonics, 2007.
mla: Rautenberg, Jens, and Bernd Henning. “Measurement of the Acoustic Properties
of Highly Absorbing Synthetic Polymers.” Proceedings of the International Congress
on Ultrasonics, 2007.
short: 'J. Rautenberg, B. Henning, in: Proceedings of the International Congress
on Ultrasonics, 2007.'
date_created: 2019-12-17T13:21:32Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
publication: Proceedings of the International Congress on Ultrasonics
status: public
title: Measurement of the acoustic properties of highly absorbing synthetic polymers
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15339'
abstract:
- lang: eng
text: 'Continuous and reliable concentration measurement of liquids still is a great
challenge as the sensor systems have to meet high industrial requirements. Apart
from chemical sensors there are a couple of acoustic systems [1] that are well
suited for a lot of industrial applications. Most of them determine the amplitude
ratio of deflected ultrasound bursts at different boundaries as well as the sound
velocity of the liquid in order to calculate its acoustic impedance and therewith
its density. The advantages of acoustic sensors are their robustness and their
fast response. Their disadvantages are sensitivity against variations of the reference
material properties as well as abrasion or soiling of the boundaries. This contribution
is about a new model-based method that uses the whole surface of an acoustic waveguide
as reference boundary: It has turned out that the principal components of a signal
at the end of the waveguide can be assigned to the different propagative acoustic
modes (Fig. 1). Therefore it is necessary to use different simulation tools, e.g.
FEM and modal analysis (Fig. 2). With this it is possible to determine the amplitudes
of each mode by means of one measured signal at the end of the waveguide and Gauss
Algorithm even if the transducer is of very simple kind [2]. Therewith it is possible
to get redundant information -- one amplitude for each mode -- for the liquid
impedance. In addition to that it is possible to generate an acoustic reference
signal without information about the liquid impedance but dissipation if we use
the fundamental mode. The different signal amplitudes and a model of acoustic
wave propagation [2, 3] offer the possibility to distinguish between dissipation
in the liquid and attenuation due to the impedance relations. Moreover, if there
are enough analysable amplitudes available, variations of the reference material
properties can be determined.'
author:
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Rautenberg J, Henning B. New approach for the reliable measurement of acoustic
impedance of liquids in an acoustic waveguide. In: Vol II. ; 2007:87-92.'
apa: Rautenberg, J., & Henning, B. (2007). New approach for the reliable measurement
of acoustic impedance of liquids in an acoustic waveguide (Vol. II, pp. 87–92).
Presented at the 13th International Conference Sensor + Test 2007, Nürnberg.
bibtex: '@inproceedings{Rautenberg_Henning_2007, title={New approach for the reliable
measurement of acoustic impedance of liquids in an acoustic waveguide}, volume={II},
author={Rautenberg, Jens and Henning, Bernd}, year={2007}, pages={87–92} }'
chicago: Rautenberg, Jens, and Bernd Henning. “New Approach for the Reliable Measurement
of Acoustic Impedance of Liquids in an Acoustic Waveguide,” II:87–92, 2007.
ieee: J. Rautenberg and B. Henning, “New approach for the reliable measurement of
acoustic impedance of liquids in an acoustic waveguide,” presented at the 13th
International Conference Sensor + Test 2007, Nürnberg, 2007, vol. II, pp. 87–92.
mla: Rautenberg, Jens, and Bernd Henning. New Approach for the Reliable Measurement
of Acoustic Impedance of Liquids in an Acoustic Waveguide. Vol. II, 2007,
pp. 87–92.
short: 'J. Rautenberg, B. Henning, in: 2007, pp. 87–92.'
conference:
end_date: 24.05.2007
location: Nürnberg
name: 13th International Conference Sensor + Test 2007
start_date: 22.05.2007
date_created: 2019-12-17T13:22:24Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
page: 87-92
publication_identifier:
isbn:
- 978-3-9810993-2-4
status: public
title: New approach for the reliable measurement of acoustic impedance of liquids
in an acoustic waveguide
type: conference
user_id: '15911'
volume: II
year: '2007'
...
---
_id: '15340'
abstract:
- lang: eng
text: 'There are a couple of acoustic systems that are well suited for continuous
and reliable concentration measurement of liquids, but the reliability is a great
challenge: Most systems determine the amplitude ratio of deflected ultrasound
bursts at different boundaries as well as the sound velocity of the liquid in
order to calculate its acoustic impedance and therewith its density. The problem
is the sensitivity of variations of reference material properties as well as abrasion
or soiling of the boundaries. This contribution is about a new model-based method
that uses the whole surface of an acoustic waveguide as reference boundary. On
the one hand the integral over a large boundary decreases influence of small boundary
defects. On the other hand it is possible to analyze different modes of sound
in the fluid. This redundancy can be used to increase reliability. The decomposition
of the received signal in its modal components by means of principle component
analysis will be discussed in detail. It will be shown that it is possible to
determine the amplitudes of each mode by means of one measured signal at the end
of the waveguide, even if the transducer and the electronic components are of
very simple kind.'
author:
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Rautenberg J, Henning B. Separation of mode-specific signals in a fluid-filled
circular waveguide. In: Proceedings of the International Congress on Ultrasonics.
; 2007.'
apa: Rautenberg, J., & Henning, B. (2007). Separation of mode-specific signals
in a fluid-filled circular waveguide. In Proceedings of the International Congress
on Ultrasonics.
bibtex: '@inproceedings{Rautenberg_Henning_2007, title={Separation of mode-specific
signals in a fluid-filled circular waveguide}, booktitle={Proceedings of the International
Congress on Ultrasonics}, author={Rautenberg, Jens and Henning, Bernd}, year={2007}
}'
chicago: Rautenberg, Jens, and Bernd Henning. “Separation of Mode-Specific Signals
in a Fluid-Filled Circular Waveguide.” In Proceedings of the International
Congress on Ultrasonics, 2007.
ieee: J. Rautenberg and B. Henning, “Separation of mode-specific signals in a fluid-filled
circular waveguide,” in Proceedings of the International Congress on Ultrasonics,
2007.
mla: Rautenberg, Jens, and Bernd Henning. “Separation of Mode-Specific Signals in
a Fluid-Filled Circular Waveguide.” Proceedings of the International Congress
on Ultrasonics, 2007.
short: 'J. Rautenberg, B. Henning, in: Proceedings of the International Congress
on Ultrasonics, 2007.'
date_created: 2019-12-17T13:23:16Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
publication: Proceedings of the International Congress on Ultrasonics
status: public
title: Separation of mode-specific signals in a fluid-filled circular waveguide
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15341'
author:
- first_name: Hans-Michael
full_name: Sonnenberg, Hans-Michael
last_name: Sonnenberg
- first_name: Axel
full_name: Schmidt-Schoenian, Axel
last_name: Schmidt-Schoenian
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Carsten
full_name: Unverzagt, Carsten
last_name: Unverzagt
- first_name: Romina
full_name: Kehl, Romina
last_name: Kehl
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Sonnenberg H-M, Schmidt-Schoenian A, Rautenberg J, Unverzagt C, Kehl R, Henning
B. Ultraschallzähler.; 2007.
apa: Sonnenberg, H.-M., Schmidt-Schoenian, A., Rautenberg, J., Unverzagt, C., Kehl,
R., & Henning, B. (2007). Ultraschallzähler.
bibtex: '@book{Sonnenberg_Schmidt-Schoenian_Rautenberg_Unverzagt_Kehl_Henning_2007,
title={Ultraschallzähler}, author={Sonnenberg, Hans-Michael and Schmidt-Schoenian,
Axel and Rautenberg, Jens and Unverzagt, Carsten and Kehl, Romina and Henning,
Bernd}, year={2007} }'
chicago: Sonnenberg, Hans-Michael, Axel Schmidt-Schoenian, Jens Rautenberg, Carsten
Unverzagt, Romina Kehl, and Bernd Henning. Ultraschallzähler, 2007.
ieee: H.-M. Sonnenberg, A. Schmidt-Schoenian, J. Rautenberg, C. Unverzagt, R. Kehl,
and B. Henning, Ultraschallzähler. 2007.
mla: Sonnenberg, Hans-Michael, et al. Ultraschallzähler. 2007.
short: H.-M. Sonnenberg, A. Schmidt-Schoenian, J. Rautenberg, C. Unverzagt, R. Kehl,
B. Henning, Ultraschallzähler, 2007.
date_created: 2019-12-17T13:24:08Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
language:
- iso: eng
status: public
title: Ultraschallzähler
type: misc
user_id: '15911'
year: '2007'
...
---
_id: '15342'
abstract:
- lang: eng
text: "In der Ultraschallmesstechnik ist der Einsatz des Impuls-Echoverfahrens verbreitet.
Wird nur ein Ultraschallwandler eingesetzt, benötigt man für das sequentielle
Senden und Empfangen einen Sende-/Empfangsumschalter. Häufig werden aber nicht
nur Impulse gesendet, sondern auch sogenannte Bursts, die aus mehreren Wellenzügen
bestehen. Die während des Sendebetriebs empfangenen Ultraschallwellen, die z.
B. durch Reflexionen von nahe gelegenen Hindernissen entstehen, können bei diesen
umschaltenden Systemen nicht ausgewertet werden.\r\nIn diesem Beitrag wird eine
Sensor-Interface-Elektronik vorgestellt, die das gleichzeitige Senden und Empfangen
von Ultraschallsignalen mit nur einem Ultraschallwandler erlaubt. Die dazu erforderliche
Trennung von Sende- und Empfangssignal wird durch einen Richtkoppler ermöglicht,
der mit vergleichsweise geringem technischem Aufwand aus Breitbandübertragern
aufgebaut ist. Eine geeignete Dimensionierung für die verkoppelten Übertrager
wurde durch die Analyse der zugehörigen Streumatrix dieses Aufbaus gefunden. Die
Arbeitsweise sowie die Bedeutung der Anpassung der Tore des Richtkopplers wird
anhand der Ankopplung verschiedener Medien an den Wandler erläutert. Die angekoppelte
akustische Last beeinflusst dabei auch die elektrischen Eigenschaften des Sensors.\r\nDurch
den Einsatz dieser Sensorelektronik wird es möglich, Reflexionen in unmittelbarer
Nähe der Sensoroberfläche aufzunehmen, ohne dass z. B. Vorlaufkörper eingesetzt
werden müssen. Möglichkeiten zur selbsttätigen Abstimmung der Sensorelektronik
auf den angeschlossenen Ultraschallwandler bzw. dessen Parameteränderungen werden
diskutiert."
author:
- first_name: Torsten
full_name: Vössing, Torsten
last_name: Vössing
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Vössing T, Rautenberg J, Henning B. Sensorelektronik zur Bestimmung von Reflexionen
sensoroberflächennaher Schichten. In: Mehra S-R, ed. Fortschritte Der Akustik.
Berlin: Dt. Ges. für Akustik; 2007.'
apa: 'Vössing, T., Rautenberg, J., & Henning, B. (2007). Sensorelektronik zur
Bestimmung von Reflexionen sensoroberflächennaher Schichten. In S.-R. Mehra (Ed.),
Fortschritte der Akustik. Berlin: Dt. Ges. für Akustik.'
bibtex: '@inproceedings{Vössing_Rautenberg_Henning_2007, place={Berlin}, title={Sensorelektronik
zur Bestimmung von Reflexionen sensoroberflächennaher Schichten}, booktitle={Fortschritte
der Akustik}, publisher={Dt. Ges. für Akustik}, author={Vössing, Torsten and Rautenberg,
Jens and Henning, Bernd}, editor={Mehra, Schew-RamEditor}, year={2007} }'
chicago: 'Vössing, Torsten, Jens Rautenberg, and Bernd Henning. “Sensorelektronik
Zur Bestimmung von Reflexionen Sensoroberflächennaher Schichten.” In Fortschritte
Der Akustik, edited by Schew-Ram Mehra. Berlin: Dt. Ges. für Akustik, 2007.'
ieee: T. Vössing, J. Rautenberg, and B. Henning, “Sensorelektronik zur Bestimmung
von Reflexionen sensoroberflächennaher Schichten,” in Fortschritte der Akustik,
2007.
mla: Vössing, Torsten, et al. “Sensorelektronik Zur Bestimmung von Reflexionen Sensoroberflächennaher
Schichten.” Fortschritte Der Akustik, edited by Schew-Ram Mehra, Dt. Ges.
für Akustik, 2007.
short: 'T. Vössing, J. Rautenberg, B. Henning, in: S.-R. Mehra (Ed.), Fortschritte
Der Akustik, Dt. Ges. für Akustik, Berlin, 2007.'
date_created: 2019-12-17T13:25:15Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
editor:
- first_name: Schew-Ram
full_name: Mehra, Schew-Ram
last_name: Mehra
language:
- iso: eng
place: Berlin
publication: Fortschritte der Akustik
publication_identifier:
isbn:
- '9783980865937'
publisher: Dt. Ges. für Akustik
status: public
title: Sensorelektronik zur Bestimmung von Reflexionen sensoroberflächennaher Schichten
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15343'
abstract:
- lang: eng
text: "In der Ultraschallmesstechnik ist der Einsatz des Impuls-Echoverfahrens verbreitet.
Wird nur ein Ultraschallwandler eingesetzt, benötigt man für das sequentielle
Senden und Empfangen einen Sende-/Empfangsumschalter. Häufig werden aber nicht
nur Impulse gesendet, sondern auch sogenannte Bursts, die aus mehreren Wellenzügen
bestehen. Die während des Sendebetriebs empfangenen Ultraschallwellen, die z.
B. durch Reflexionen von nahe gelegenen Hindernissen entstehen, können bei diesen
umschaltenden Systemen nicht ausgewertet werden.\r\nIn diesem Beitrag wird eine
Sensor-Interface-Elektronik vorgestellt, die das gleichzeitige Senden und Empfangen
von Ultraschallsignalen mit nur einem Ultraschallwandler erlaubt. Die dazu erforderliche
Trennung von Sende- und Empfangssignal wird durch einen Richtkoppler ermöglicht,
der mit vergleichsweise geringem technischem Aufwand aus Breitbandübertragern
aufgebaut ist. Eine geeignete Dimensionierung für die verkoppelten Übertrager
wurde durch die Analyse der zugehörigen Streumatrix dieses Aufbaus gefunden. Die
Arbeitsweise sowie die Bedeutung der Anpassung der Tore des Richtkopplers wird
anhand der Ankopplung verschiedener Medien an den Wandler erläutert. Die angekoppelte
akustische Last beeinflusst dabei auch die elektrischen Eigenschaften des Sensors.\r\nDurch
den Einsatz dieser Sensorelektronik wird es möglich, Reflexionen in unmittelbarer
Nähe der Sensoroberfläche aufzunehmen, ohne dass z. B. Vorlaufkörper eingesetzt
werden müssen. Möglichkeiten zur selbsttätigen Abstimmung der Sensorelektronik
auf den angeschlossenen Ultraschallwandler bzw. dessen Parameteränderungen werden
diskutiert."
author:
- first_name: Torsten
full_name: Vössing, Torsten
last_name: Vössing
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Vössing T, Rautenberg J, Henning B. Sensorelektronik zur Bestimmung von Reflexionen
sensoroberflächennaher Schichten. In: Mehra S-R, ed. Fortschritte Der Akustik.
Berlin: Dt. Ges. für Akustik; 2007.'
apa: 'Vössing, T., Rautenberg, J., & Henning, B. (2007). Sensorelektronik zur
Bestimmung von Reflexionen sensoroberflächennaher Schichten. In S.-R. Mehra (Ed.),
Fortschritte der Akustik. Berlin: Dt. Ges. für Akustik.'
bibtex: '@inproceedings{Vössing_Rautenberg_Henning_2007, place={Berlin}, title={Sensorelektronik
zur Bestimmung von Reflexionen sensoroberflächennaher Schichten}, booktitle={Fortschritte
der Akustik}, publisher={Dt. Ges. für Akustik}, author={Vössing, Torsten and Rautenberg,
Jens and Henning, Bernd}, editor={Mehra, Schew-RamEditor}, year={2007} }'
chicago: 'Vössing, Torsten, Jens Rautenberg, and Bernd Henning. “Sensorelektronik
Zur Bestimmung von Reflexionen Sensoroberflächennaher Schichten.” In Fortschritte
Der Akustik, edited by Schew-Ram Mehra. Berlin: Dt. Ges. für Akustik, 2007.'
ieee: T. Vössing, J. Rautenberg, and B. Henning, “Sensorelektronik zur Bestimmung
von Reflexionen sensoroberflächennaher Schichten,” in Fortschritte der Akustik,
Stuttgar, 2007.
mla: Vössing, Torsten, et al. “Sensorelektronik Zur Bestimmung von Reflexionen Sensoroberflächennaher
Schichten.” Fortschritte Der Akustik, edited by Schew-Ram Mehra, Dt. Ges.
für Akustik, 2007.
short: 'T. Vössing, J. Rautenberg, B. Henning, in: S.-R. Mehra (Ed.), Fortschritte
Der Akustik, Dt. Ges. für Akustik, Berlin, 2007.'
conference:
end_date: '22.03.2007 '
location: Stuttgar
name: 3. Deutsche Jahrestagung für Akustik (DAGA 2007)
start_date: '19.03.2007 '
date_created: 2019-12-17T13:31:04Z
date_updated: 2022-01-06T06:52:20Z
department:
- _id: '49'
editor:
- first_name: Schew-Ram
full_name: Mehra, Schew-Ram
last_name: Mehra
language:
- iso: eng
place: Berlin
publication: Fortschritte der Akustik
publication_identifier:
isbn:
- '9783980865937'
publisher: Dt. Ges. für Akustik
status: public
title: Sensorelektronik zur Bestimmung von Reflexionen sensoroberflächennaher Schichten
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15344'
abstract:
- lang: eng
text: In many applications ultrasonic transducers are used for transmitting and
receiving ultrasonic waves. Ultrasonic sensor systems meet the practical requirements
of industrial applications quite well. Typical sensor applications are for example
the measurement of distance and thickness. Especially if only one ultrasonic transceiver
and the well-known pulse-echo-method are used, the sensor electronics has to switch
from transmitting to receiving mode. This is one of the most limiting properties
because the probe can not receive echoes from nearby obstacles or thin material
layers. This contribution deals with the development of an electronic interface
circuit for ultrasonic sensors allowing transmitting and receiving of acoustic
signals simultaneously. There are already several methods to separate the transmitted
from the received signal for instance the well-known circulator in the telephone,
the differential transformer mentioned by Bradfield [1] or a directional coupler
[2]. The directional coupler consists of two broadband transformers linked with
each other in such a way that it equally distributes the input power at port one
to the third and fourth port, while port two is isolated. This circuit is also
known as 3 dB directional coupler and makes it possible to get reference echoes
directly from the interface between the sensor and the medium of interest. Several
reflectors or multiple sound paths such as used in ultrasonic density measurement
systems are unnecessary [3].
author:
- first_name: Torsten
full_name: Vössing, Torsten
last_name: Vössing
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Romina
full_name: Kehl, Romina
last_name: Kehl
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Vössing T, Rautenberg J, Kehl R, Henning B. Simultaneous transmitting and
receiving with ultrasonic sensors. In: ; 2007.'
apa: Vössing, T., Rautenberg, J., Kehl, R., & Henning, B. (2007). Simultaneous
transmitting and receiving with ultrasonic sensors. Presented at the 3th International
Conference Sensor + Test 2007, Nuremberg.
bibtex: '@inproceedings{Vössing_Rautenberg_Kehl_Henning_2007, title={Simultaneous
transmitting and receiving with ultrasonic sensors}, author={Vössing, Torsten
and Rautenberg, Jens and Kehl, Romina and Henning, Bernd}, year={2007} }'
chicago: Vössing, Torsten, Jens Rautenberg, Romina Kehl, and Bernd Henning. “Simultaneous
Transmitting and Receiving with Ultrasonic Sensors,” 2007.
ieee: T. Vössing, J. Rautenberg, R. Kehl, and B. Henning, “Simultaneous transmitting
and receiving with ultrasonic sensors,” presented at the 3th International Conference
Sensor + Test 2007, Nuremberg, 2007.
mla: Vössing, Torsten, et al. Simultaneous Transmitting and Receiving with Ultrasonic
Sensors. 2007.
short: 'T. Vössing, J. Rautenberg, R. Kehl, B. Henning, in: 2007.'
conference:
end_date: 24.05.2007
location: Nuremberg
name: 3th International Conference Sensor + Test 2007
start_date: 22.05.2007
date_created: 2019-12-17T14:22:24Z
date_updated: 2022-01-06T06:52:21Z
department:
- _id: '49'
language:
- iso: eng
publication_identifier:
isbn:
- 978-3-9810993-2-4
status: public
title: Simultaneous transmitting and receiving with ultrasonic sensors
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15345'
abstract:
- lang: eng
text: In this contribution the application of a directional coupler for analysing
reference reflections from thin layers in ultrasonic measurement of the characteristic
acoustic impedance is presented. In a prior work ([2]) it was shown, that a directional
coupler can be used in combination with an ultrasonic transducer to get reflections
from layers that are very close to the transducers surface. Since the directional
coupler provides the opportunity to send and receive signals at the same time,
these layers can be very thin ({\textless} 1 mm). Reflections that arrive at the
transducer during the sending process can be analysed because the directional
coupler separates the receiving signal from the input signal of the transducer.
When only one transducer is used to measure the acoustic impedance of a liquid
the reflections from the thin layer reach the transducer after a very short time.
The reflections sum up and with the concept of reflection and transmission coefficients
a relation is found between the measured amplitude and a reference amplitude which
was measured before. The exciting signal could be a burst of some periods of a
sinusoidal alternating voltage. The advantages of using thin layers for the described
task are the small geometry that allows flexible application of the sensor and
the minimisation of temperature gradients within the medium because thin layers
can follow thermal fluctuations faster than thick ones. In this paper the functional
principle and first achievements are presented.
author:
- first_name: Torsten
full_name: Vössing, Torsten
last_name: Vössing
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Andreas
full_name: Schröder, Andreas
last_name: Schröder
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Vössing T, Rautenberg J, Schröder A, Henning B. Ultrasonic measurement of
the characteristic acoustic impedance using a directional coupler to analyse reference
reflections from thin layers. In: ; 2007.'
apa: Vössing, T., Rautenberg, J., Schröder, A., & Henning, B. (2007). Ultrasonic
measurement of the characteristic acoustic impedance using a directional coupler
to analyse reference reflections from thin layers. Presented at the 8th International
Conference on Electronic Measurement & Instruments, ICEMI 2007, Xi’An, China.
bibtex: '@inproceedings{Vössing_Rautenberg_Schröder_Henning_2007, title={Ultrasonic
measurement of the characteristic acoustic impedance using a directional coupler
to analyse reference reflections from thin layers}, author={Vössing, Torsten and
Rautenberg, Jens and Schröder, Andreas and Henning, Bernd}, year={2007} }'
chicago: Vössing, Torsten, Jens Rautenberg, Andreas Schröder, and Bernd Henning.
“Ultrasonic Measurement of the Characteristic Acoustic Impedance Using a Directional
Coupler to Analyse Reference Reflections from Thin Layers,” 2007.
ieee: T. Vössing, J. Rautenberg, A. Schröder, and B. Henning, “Ultrasonic measurement
of the characteristic acoustic impedance using a directional coupler to analyse
reference reflections from thin layers,” presented at the 8th International Conference
on Electronic Measurement & Instruments, ICEMI 2007, Xi’An, China, 2007.
mla: Vössing, Torsten, et al. Ultrasonic Measurement of the Characteristic Acoustic
Impedance Using a Directional Coupler to Analyse Reference Reflections from Thin
Layers. 2007.
short: 'T. Vössing, J. Rautenberg, A. Schröder, B. Henning, in: 2007.'
conference:
end_date: 18.08.2007
location: Xi’An, China
name: 8th International Conference on Electronic Measurement & Instruments, ICEMI
2007
start_date: 16.08.2007
date_created: 2019-12-17T14:27:14Z
date_updated: 2022-01-06T06:52:21Z
department:
- _id: '49'
language:
- iso: eng
status: public
title: Ultrasonic measurement of the characteristic acoustic impedance using a directional
coupler to analyse reference reflections from thin layers
type: conference
user_id: '15911'
year: '2007'
...
---
_id: '15470'
author:
- first_name: Gitta
full_name: Domik, Gitta
id: '90'
last_name: Domik
citation:
ama: 'Domik G. A graduate level course on real-time medical graphics. In: ACM
SIGGRAPH 2007 Educators Program. ; 2007:2.'
apa: Domik, G. (2007). A graduate level course on real-time medical graphics. In
ACM SIGGRAPH 2007 educators program (p. 2).
bibtex: '@inproceedings{Domik_2007, title={A graduate level course on real-time
medical graphics}, booktitle={ACM SIGGRAPH 2007 educators program}, author={Domik,
Gitta}, year={2007}, pages={2} }'
chicago: Domik, Gitta. “A Graduate Level Course on Real-Time Medical Graphics.”
In ACM SIGGRAPH 2007 Educators Program, 2, 2007.
ieee: G. Domik, “A graduate level course on real-time medical graphics,” in ACM
SIGGRAPH 2007 educators program, 2007, p. 2.
mla: Domik, Gitta. “A Graduate Level Course on Real-Time Medical Graphics.” ACM
SIGGRAPH 2007 Educators Program, 2007, p. 2.
short: 'G. Domik, in: ACM SIGGRAPH 2007 Educators Program, 2007, p. 2.'
date_created: 2020-01-09T08:59:46Z
date_updated: 2022-01-06T06:52:25Z
department:
- _id: '65'
language:
- iso: eng
page: '2'
publication: ACM SIGGRAPH 2007 educators program
status: public
title: A graduate level course on real-time medical graphics
type: conference
user_id: '15458'
year: '2007'
...
---
_id: '15471'
author:
- first_name: H
full_name: Fricke, H
last_name: Fricke
- first_name: M
full_name: Schwier, M
last_name: Schwier
- first_name: R
full_name: Weise, R
last_name: Weise
- first_name: A
full_name: Elsner, A
last_name: Elsner
- first_name: E
full_name: Fricke, E
last_name: Fricke
- first_name: Gitta
full_name: Domik, Gitta
id: '90'
last_name: Domik
- first_name: W
full_name: Burchert, W
last_name: Burchert
citation:
ama: 'Fricke H, Schwier M, Weise R, et al. Coregistration and visualization of cardiac
CT studies and dynamic PET studies using scene-graphs, direct volume rendering
and 2D transfer functions. In: Proc. of the 54th SNM Annual Meeting. Vol
48. ; 2007.'
apa: Fricke, H., Schwier, M., Weise, R., Elsner, A., Fricke, E., Domik, G., &
Burchert, W. (2007). Coregistration and visualization of cardiac CT studies and
dynamic PET studies using scene-graphs, direct volume rendering and 2D transfer
functions. In Proc. of the 54th SNM Annual Meeting (Vol. 48).
bibtex: '@inproceedings{Fricke_Schwier_Weise_Elsner_Fricke_Domik_Burchert_2007,
title={Coregistration and visualization of cardiac CT studies and dynamic PET
studies using scene-graphs, direct volume rendering and 2D transfer functions},
volume={48}, booktitle={Proc. of the 54th SNM Annual Meeting}, author={Fricke,
H and Schwier, M and Weise, R and Elsner, A and Fricke, E and Domik, Gitta and
Burchert, W}, year={2007} }'
chicago: Fricke, H, M Schwier, R Weise, A Elsner, E Fricke, Gitta Domik, and W Burchert.
“Coregistration and Visualization of Cardiac CT Studies and Dynamic PET Studies
Using Scene-Graphs, Direct Volume Rendering and 2D Transfer Functions.” In Proc.
of the 54th SNM Annual Meeting, Vol. 48, 2007.
ieee: H. Fricke et al., “Coregistration and visualization of cardiac CT studies
and dynamic PET studies using scene-graphs, direct volume rendering and 2D transfer
functions,” in Proc. of the 54th SNM Annual Meeting, 2007, vol. 48.
mla: Fricke, H., et al. “Coregistration and Visualization of Cardiac CT Studies
and Dynamic PET Studies Using Scene-Graphs, Direct Volume Rendering and 2D Transfer
Functions.” Proc. of the 54th SNM Annual Meeting, vol. 48, 2007.
short: 'H. Fricke, M. Schwier, R. Weise, A. Elsner, E. Fricke, G. Domik, W. Burchert,
in: Proc. of the 54th SNM Annual Meeting, 2007.'
date_created: 2020-01-09T09:03:58Z
date_updated: 2022-01-06T06:52:25Z
department:
- _id: '65'
intvolume: ' 48'
language:
- iso: eng
publication: Proc. of the 54th SNM Annual Meeting
status: public
title: Coregistration and visualization of cardiac CT studies and dynamic PET studies
using scene-graphs, direct volume rendering and 2D transfer functions
type: conference
user_id: '14955'
volume: 48
year: '2007'
...