Table of Contents
Sensors, Volume 19, Issue 13 (July-1 2019) – 195 articles
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Cover Story (view full-size image) Photoacoustic sensors have been suggested for the non-invasive measurement of glucose concentration [...] Read more. Photoacoustic sensors have been suggested for the non-invasive measurement of glucose concentration in the interstitial fluids related to blood glucose level of diabetic patients. However, the measurements typically exhibit a weak photoacoustic signal and a corresponding poor sensitivity. Hence, T-shaped acoustic resonators are used to amplify the signal. Accurate numerical modelling of sound generation and sound propagation enables the optimization of the resonator’s geometry for signal amplification. Here, we present the amplitude mode expansion (AME) method as a very fast and computationally less demanding simulation alternative to the viscothermal acoustic model. Thus, the AME method is very well suited for numerical optimization procedures where high performance is essential. Measurement of the photoacoustic signal confirms the accuracy of the simulations. View this paper.