Next Article in Journal
Sub-ppm-Level Ammonia Detection Using Photoacoustic Spectroscopy with an Optical Microphone Based on a Phase Interferometer
Next Article in Special Issue
Scattering of Microwaves by a Passive Array Antenna Based on Amorphous Ferromagnetic Microwires for Wireless Sensors with Biomedical Applications
Previous Article in Journal
Using Linguistic Properties of Place Specification for Network Naming to Improve Mobility Performance
Previous Article in Special Issue
A Non-Invasive Continuous Blood Pressure Estimation Approach Based on Machine Learning
Open AccessArticle

Experimental and Numerical Investigation of a Photoacoustic Resonator for Solid Samples: Towards a Non-Invasive Glucose Sensor

1
Department of Mechanical Engineering and Production, Hamburg University of Applied Sciences, 20099 Hamburg, Germany
2
Mads Clausen Institute, University of Southern Denmark, 6400 Sønderborg, Denmark
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(13), 2889; https://doi.org/10.3390/s19132889
Received: 31 May 2019 / Revised: 24 June 2019 / Accepted: 25 June 2019 / Published: 29 June 2019
(This article belongs to the Special Issue Non-Invasive Biomedical Sensors)
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. View Full-Text
Keywords: Photoacoustic spectroscopy; acoustic resonator; glucose Photoacoustic spectroscopy; acoustic resonator; glucose
Show Figures

Figure 1

MDPI and ACS Style

El-Busaidy, S.; Baumann, B.; Wolff, M.; Duggen, L.; Bruhns, H. Experimental and Numerical Investigation of a Photoacoustic Resonator for Solid Samples: Towards a Non-Invasive Glucose Sensor. Sensors 2019, 19, 2889.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop