Simulation of Electro-optical Device for Fire Detection on Basis of Spectral Pyrometry Method

Abstract

Simulation of a high-speed electro-optical device for fire detection based on a spectral pyrometry method was performed. Analytical dependencies for simulation of a high-speed electro-optical device for fire detection based on a spectral pyrometry method were formulated. The initial data for simulation about spectral characteristics of the test fires were taken from literature. Parameters of the photodetectors (PD-24-10 and PD-38) were taken from documentation on the photodetectors. The developed computer model allows simulating the operation of electro-optical device in wide spectral ranges of 1200--4800 nm with wavelength step of 10 nm for test fires with temperature from 800 to 1600 K. Spectral ranges for detection of fire radiation by the electro-optical device were studied. Six spectral ranges were determined during the study. The photodetectors of the electro-optical device was selected. The set of spectral ranges was determined: $1800\pm 50nm;1900\pm 50nm;2000\pm 50nm; 3000 \pm 50nm;3400\pm 50nm;3550\pm$ 50nm. The maximum error of temperature calculation using this set of spectral ranges was 10%. Infrared photodetectors PD-19sr, PD-21sr, PD-29, PD34, PD-38 (manufactured by IoffeLED) were selected for the implementation of the electro-optical device.