Rueck, Thomas and Mueller, Max and Jobst, Simon and Weigl, Stefan and Pangerl, Jonas and Bierl, Rudolf and Matysik, Frank-Michael (2023) Digital Twin of a photoacoustic trace gas sensor for monitoring methane in complex gas compositions. SENSORS AND ACTUATORS B-CHEMICAL, 378: 133119. ISSN , 0925-4005
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The digitalization of industrial processes requires smart sensor systems. Photoacoustic spectroscopy is well suited for this purpose as it allows for small-sized and low-cost trace gas analysis. However, the method is susceptible to changes in measurement conditions and standard calibration routines often fail to correct for all changes. We therefore created a Digital Twin (DT) of a photoacoustic trace gas sensor for methane and evaluated it regarding variations in gas composition (CH4, N2, O2, CO2, H2O), temperature and pressure. With a mean absolute per-centage error of 0.8 % the accuracy of the sensor after DT compensation significantly exceeds the 24 % achieved based on standard calibration in nitrogen. For the first time, we can fully analytically compute the photoacoustic signal under moderate ambient conditions with an error in the ppbV range by taking a holistic approach. Assuming knowledge of the underlying energy transfer processes, the model of this Digital Twin can be adapted to any microphone based photoacoustic sensor for monitoring any analyte species.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIBRATIONAL-ENERGY TRANSFER; RELAXATION; MIXTURES; OXYGEN; O-2; Digital Twin; Photoacoustic spectroscopy; Smart sensor; Acoustic resonance monitoring; CoNRad; Calibration -free method |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Jan 2024 09:54 |
| Last Modified: | 31 Jan 2024 09:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56698 |
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