Formation of informative signals in an optical toxic gas detector

Authors

DOI:

https://doi.org/10.15587/1729-4061.2026.353247

Keywords:

optical sensor, informative detector signal, conjugated polymers, toxic gases, signal converter

Abstract

Detection of various gas environments is an important security task, especially in conditions of military operations and in contaminated areas. In this case, optical gas sensors of the colorimetric type are effective, which can promptly signal the presence of toxic substances in "field conditions", do not require complex equipment or energy consumption.

The object of the study is a detector of harmful gases of the colorimetric type. The problem of improving the characteristics of colorimetric sensors by amplifying useful signals and reducing the influence of spurious radiation is being solved.

To solve the problem, a functional and mathematical model of the signal path of a pollutant detector was developed. A method for forming an optical signal of increased sensitivity due to multiple passage and reflection of light fluxes in a colorimetric sensor model was proposed.

A model of an optical gas detector based on a polyaniline sensor element was manufactured. The presence of ammonia vapors was analyzed using gas-stimulated changes in optical absorption at different wavelengths, namely, 470 ± 5, 528 ± 7 and 623 ± 5 nm. The proposed functional scheme of the detector signal path allowed to improve its sensitivity and selectivity, which is explained by the amplification of useful signals and the reduction of9 the influence of parasitic radiation.

The high speed of recovery of the resulting sensor to the initial values (up to 10 s) ensures its reversibility and opens up prospects for effective practical use, in particular, monitoring the state of the environment, the freshness of food products, harmful gas leaks near landfills, chemical storage sites, etc.

Author Biographies

Olena Aksimentyeva, Ivan Franko National University of Lviv

Doctor of Chemical Sciences, Professor

Department of Physical and Colloid Chemistry

Roman Holyaka, Lviv Polytechnic National University

Doctor of Technical Sciences, Professor

Department of Electronics and Information Technology

Bohdan Tsizh, Kazimierz Wielki University; Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv

Doctor of Technical Sciences, Professor

Department of Structural Materials and Biomaterials

Department of Food Engineering Processes and Equipment

Hryhoriy Barylo, Lviv Polytechnic National University

Doctor of Technical Sciences

Department of Electronic Engineering

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Formation of informative signals in an optical toxic gas detector

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Published

2026-02-27

How to Cite

Aksimentyeva, O., Holyaka, R., Tsizh, B., & Barylo, H. (2026). Formation of informative signals in an optical toxic gas detector. Eastern-European Journal of Enterprise Technologies, 1(5 (139), 14–25. https://doi.org/10.15587/1729-4061.2026.353247

Issue

Vol. 1 No. 5 (139) (2026): Applied physics

Section

Applied physics

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Copyright (c) 2026 Olena Aksimentyeva, Roman Holyaka, Bohdan Tsizh, Hryhoriy Barylo

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