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Optical sensor of harmful air impurity concentration

Gunko Irina, Hraniak Valerii, Yaropud Vitalii, Kupchuk Ihor, Rutkevych Volodymyr

Przegląd Elektrotechniczny

2021

R. 97, nr 7

76--79

It is shown that to solve the problem of ensuring acceptable sanitary conditions in livestock premises while minimizing energy costs, it is advisable to use an automated exhaust ventilation system with control over the contour of the allowable concentration of harmful atmospheric impurities. The proposed block diagram of the sensor concentration of harmful impurities in the air, suitable for operation in conjunction with an automated ventilation system. Its mathematical model and transformation equation are obtained. It is shown that in the measurement range, which corresponds to the change of controlled impurities in the range from zero to the maximum allowable concentration, the static characteristic of the proposed sensor can be approximated by a linear function without significant additional methodological error.

Wykazano, że w celu rozwiązania problemu zapewnienia akceptowalnych warunków sanitarnych w pomieszczeniach inwentarskich przy jednoczesnym zminimalizowaniu kosztów energii wskazane jest zastosowanie automatycznego systemu wentylacji wyciągowej z kontrolą konturu dopuszczalnego stężenia szkodliwych zanieczyszczeń atmosferycznych. Proponowany schemat blokowy czujnika stężenia szkodliwych zanieczyszczeń w powietrzu, przystosowany do współpracy z z systemem wentylacji. Wykazano, że w zakresie pomiarowym, który odpowiada zmianie kontrolowanych zanieczyszczeń w zakresie od zera do maksymalnego dopuszczalnego stężenia, charakterystykę statyczną proponowanego czujnika można aproksymować funkcją liniową bez znacznego dodatkowego błędu metodologicznego.

Time performance of RGB to HSI colour space transformation methods

Ziemba A., Fornalik-Wajs E.

Archives of Thermodynamics

2018

Vol. 39, no 1

111--128

Present paper is a continuation of works on evaluation of red, green, blue (RGB) to hue, saturation, intensity (HSI) colour space transformation in regard to digital image processing application in optical measurements methods. HSI colour space seems to be the most suitable domain for engineering applications due to its immunity to non-uniform lightning. Previous stages referred to the analysis of various RGB to HSI colour space transformations equivalence and programming platform configuration influence on the algorithms execution. The main purpose of this step is to understand the influence of computer processor architecture on the computing time, since analysis of images requires considerable computer resources. The technical development of computer components is very fast and selection of particular processor architecture can be an advantage for fastening the image analysis and then the measurements results. In this paper the colour space transformation algorithms, their complexity and execution time are discussed. The most common algorithms were compared with the authors own one. Computing time was considered as the main criterion taking into account a technical advancement of two computer processor architectures. It was shown that proposed algorithm was characterized by shorter execution time than in reported previously results.