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Publikationen von Professorinnen und Professoren der HAW Hamburg

Jahr:  
Alle : 101, ... , 2016, 2017, 2018, 2019
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Alle : A, À, B, C, D, E, F, G, H, I, J, K, L, M, N, O, Ö, P, Q, R, S, T, U, V, W, Y, Z 
Alle : Dahal, ... , Derr, Dessecker, Dethlefs, ... , D`Ancona 
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Referenzen

Zeitschriftenbeiträge:

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Said El-Busaidy, Bernd Baumann, Marcus Wolff, Lars Duggen und Henry Bruhns
Experimental and Numerical Investigation of a Photoacoustic Resonator for Solid Samples: Towards a Non-Invasive Glucose Sensor
Sensors, 19(13)
29 Juni 2019

Marker: TI-MP

Zusammenfassung: T-cell resonators have been used lately for non-invasive blood glucose measurements for photoacoustic spectroscopy on skin samples. A resonator has a significant role in determining the strength of the measured signal and the overall sensitivity of the sensor. Here we present results of the measurement of the photoacoustic signal of such a T-cell resonator. The signal is also modelled using the amplitude mode expansion method, which is based on eigenmode expansion and the introduction of losses in the form of loss factors. The measurement reproduced almost all the calculated resonances from the numerical models with fairly good agreement. The cause of the differences between the measured and the simulated resonances are explained. In addition, the amplitude mode expansion simulation model is established as a faster and computationally less demanding photoacoustic simulation alternative to the viscothermal model. The resonance frequencies from the two models differ by less than 1.8%. It is noted that the relative height of the amplitudes from the two models depends on the location of the antinodes within the different parts of the resonator. The amplitude mode expansion model provides a quick simulation tool for the optimization and design of macro resonators.

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Levin Schilling und Peter Dalhoff
Piezoelectric Patch Transducers: Can alternative sensors enhance bearing failure prediction?
Journal of Physics: Conference Series,
2019
akzeptiert

Marker: TI-MP

Plakate:

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Said El-Busaidy, Bernd Baumann, Marcus Wolff und Lars Duggen
Modelling of an open photoacoustic resonator for blood glucose measurements
11 Juli 2019
ICPPP 2019

Marker: TI-MP

Konferenz-/Workshop-/Podiumsdiskussionsbeiträge, Ausstellungs-/Modenschaubeteiligungen:

pdf
Levin Schilling und Peter Dalhoff
Piezoelectric Patch Transducers: Can alternative sensors enhance bearing failure prediction?
EERA Deepwind'19
Trondheim, Norway
17 Januar 2019
English

Schlüsselwörter: sensor technologies, piezoelectric patch transducers, condition monitoring, wind energy

Marker: TI-MP

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Said El-Busaidy, Bernd Baumann, Marcus Wolff und Lars Duggen
Modeling the photoacoustic signal of an open resonator
Comsol User Day
2019

Marker: TI-MP

Zusammenfassung: Photoacoustic sensors are well established for the detection of substances of small concentrations. Ordinarily these sensors make use of closed acoustic resonators for signal enhancement. Due to special requirements for certain applications we we need to consider an acoustic resonator with an opening. In the presentation we give an account of the challenges this bears for the simulation of the photoacoustic signal.

Berichte:

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Said El-Busaidy, Bernd Baumann, Marcus Wolff, Lars Duggen und Henry Bruhns
Experimental and numerical investigation of photoacoustic resonator for solid samples
Preprint
Dokument Nummer: arXiv: 1903.11388
2019

Marker: TI-MP

Zusammenfassung: The photoacoustic signal in a closed T-cell resonator is generated and measured using laser based photoacoustic spectroscopy. The signal is modelled using the amplitude mode expansion method, which is based on eigenmode expansion and introduction of losses in form of loss factors. The measurement reproduced almost all the calculated resonances from the numerical models with fairly good agreement. The cause of the differences between the measured and the simulated resonances are explained. In addition, the amplitude mode expansion simulation model is established as a quicker and computationally less demanding photoacoustic simulation alternative to the viscothermal model. The resonance frequencies obtained from the two models deviate by less than 1.8%. It was noted that the relative height of the amplitudes of the two models depended on the location of the antinodes within the resonator.

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Letzte Änderung: 23.01.15

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