| Title: | Time delay-phase harmonic model of transmitted laser signal for gas concentration estimation |
| Authors: | Bach, N. V. |
| Keywords: | материалы конференций;tunable diode laser absorption spectroscopy;gas concentration;Levenberg-Marquardt algorithm;harmonic model;time delay;phase shift |
| Issue Date: | 2026 |
| Publisher: | БГУИР |
| Citation: | Bach, N. V. Time delay-phase harmonic model of transmitted laser signal for gas concentration estimation / N. V. Bach // Информационная безопасность : сборник материалов 62-й научной конференции аспирантов, магистрантов и студентов БГУИР, Минск, 13–17 апреля 2026 г. / Белорусский государственный университет информатики и радиоэлектроники ; редкол.: С. В. Дробот (гл. ред.) [и др.]. – Минск, 2026. – С. 234–236. |
| Abstract: | The proposed time delay-phase harmonic model takes into account absorption, scattering, and reflectance effects and the relationship between the phase shift and the time delay and the absorption pulse signal quality. The Levenberg–Marquardt algorithm is applied to define optimal model parameters, enabling an efficient and effective of gas concentration estimation process. Experimental results demonstrate a strong correlation between the harmonic ratio feature and methane concentration under varying laser power conditions. Furthermore, the phase shift effect on the absorption signal is investigated, revealing its impact on waveform symmetry and peak distribution. The proposed method has been proven to require only a few signal cycles for gas concentration estimation. |
| URI: | https://libeldoc.bsuir.by/handle/123456789/63726 |
| Appears in Collections: | Информационная безопасность : материалы 62-й научной конференции аспирантов, магистрантов и студентов (2026)
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