METHOD OF SPECTROMETRIC DETERMINATION OF GAS FLOW TEMPERATURE Russian patent published in 2019 - IPC G01K13/02 G01J5/10 G06N3/02 G06N3/08 G06F17/50 

FIELD: measuring equipment.

SUBSTANCE: invention relates to remote measurement of high gas temperatures, in particular to methods for spectrometric measurement of gas flow temperature and processing of spectral data of optical sensors for determining temperature of gas flows and can be used for experimental studies of working process of power plants and for improving reliability during operation of gas turbines and gas turbine engines. Disclosed is a method for spectrometric determination of gas flow temperature, which involves measurement of emission intensity of a stream of gases, from which the current gas flow temperature is determined. First, using reference thermocouple, current values of gas flow temperature and intensity of its radiation are measured in at least two spectral regions in visible range and at least in two spectral regions in infrared range. Obtained data are used to calculate intensity ratios; the obtained data are used to form a training sample for training an artificial neural network, by means of which the value of the current gas flow temperature is calculated. Neural network is trained by back propagation of the error. During the training neural network weight coefficients are corrected to achieve the specified accuracy and are used to calculate the unknown value. Intensity of radiation of the analyzed gas flow is measured in at least two spectral regions in the visible range and at least in two regions of the spectrum in the infrared range, and the unknown current temperature of the analyzed gas stream is calculated by formula t^o=ƒ(r₁,r₂,…,r_m,r_m+1,r_m+2,…r_L0,w_lt,w_tj,w_jk,b_t0,b_j0,b_k0), where r₁... r_L0 - values of ratios of intensity of emission of gas flow in selected sections of spectrum, w_lt, w_tj, w_jk are weight coefficients, and b_t0, b_j0, b_k0 – displacement.

EFFECT: high reliability of measuring temperature of the stream of gases by taking into account the saturation of the fuel-air mixture and eliminating the effect of contamination of the optical channel and the effect of concentrations of chemical elements in the fuel-air mixture.

1 cl, 6 dwg