Electronic Measurement System for IoT Sensors Studying

Authors

DOI:

https://doi.org/10.31861/sisiot2023.2.02003

Keywords:

sensor, humidity, digital signal processing, measuring system

Abstract

The paper substantiates the choice of methodology and develops an electronic measuring system that provides opportunities to study the sensors of Internet of Things systems. Based on the analysis of existing methods of building similar systems, we chose an approach and offered a method of ensuring the given level of temperature and humidity in the climate chamber. In particular, the determination of the level of relative humidity for its further regulation is carried out using a reference sensor of relative humidity and temperature. The parameters of the sensor studied by the students are determined based on the measurement of the frequency of the generator built using the NE555 chip. The necessary humidity level in the climatic chamber is maintained by mixing wet and dry air, which flows are regulated by valves of different diameters. The developed electronic measuring system was manufactured, and its experimental testing was carried out. The experimental results of the dependence of the humidity in the climate chamber, measured using the reference sensor DHT22, on the ratio of the areas of the holes in the valves indicate its nonlinearity. At the same time, the dependence of the frequency of generated oscillations and the capacity of the analog capacitive humidity sensor on the relative humidity in the climate chamber is practically linear. According to the results of the experiments we obtained an empirical formula, taken into account when programming the device and intended for further measurements of relative humidity. The main characteristics of the developed electronic measuring system are the relative humidity adjustment range (40–80 %), the temperature change range (20–80 °C), and the time to set the specified humidity level after replacing the valves (6–7 minutes). The electronic measuring system can be used for educational purposes, as well as for solving practical tasks related to the control and regulation of temperature and relative humidity of air in a closed space.

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Author Biographies

  • Volodymyr Brailovsky, Yuriy Fedkovych Chernivtsi National University

    Ph.D., an associate professor at the Department of Radio Engineering and Information Security at the Institute of Physical, Technical and Computer Sciences of Yu. Fedkovych Chernivtsi National University, Chernivtsi, Ukraine. Research field: radio engineering and information security. Author of nearly 100 publications in this research area.

  • Bohdan Fitsak

    Student at the Department of Radio Engineering and Information Security at the Institute of Physical, Technical and Computer Sciences of Yu. Fedkovych Chernivtsi National University, Chernivtsi, Ukraine. Research field: radio engineering and IoT systems.

  • Halyna Lastivka, Yuriy Fedkovych Chernivtsi National University

    Received BS and MS degrees in Radio Engineering from Yuriy Fedkovych Chernivtsi National University, Ukraine; Ph.D. She is currently an associate professor of the Radio Engineering Department of Yuriy Fedkovych Chernivtsi National University. Research field: methods and means of radio spectroscopy, their application for research of sensory properties, cybersecurity.

  • Marharyta Rozhdestvenska, Yuriy Fedkovych Chernivtsi National University

    Ph.D., an associate professor at the Department of Radio Engineering and Information Security at the Institute of Physical, Technical and Computer Sciences of Yuriy Fedkovych Chernivtsi National University, Chernivtsi, Ukraine. Research field: radio engineering, IoT systems, and information security.

References

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Published

2023-12-30

Issue

Vol. 1 No. 2 (2023)

Section

Articles

License

Copyright (c) 2023 Security of Infocommunication Systems and Internet of Things

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
V. Brailovsky, B. Fitsak, H. Lastivka, and M. Rozhdestvenska, “Electronic Measurement System for IoT Sensors Studying”, SISIOT, vol. 1, no. 2, p. 02003, Dec. 2023, doi: 10.31861/sisiot2023.2.02003.