SU664049A1

SU664049A1 - Temperature-measuring method

Info

Publication number: SU664049A1
Application number: SU762366788A
Authority: SU
Inventors: Святослав Петрович Фуртак; Владимир Иванович Лах; Гарольд Павлович Сатченко
Original assignee: Предприятие П/Я А-7848
Priority date: 1976-06-01
Filing date: 1976-06-01
Publication date: 1979-05-25

Description

(54) СПОСОБ ИЗМЕРЕНИЯ ТЕМПЕРАТУРЫ(54) METHOD OF TEMPERATURE MEASUREMENT

фотонов, св занный с квазислучайным испусканием фотонов, имеет видphotons associated with quasi-random emission of photons has the form

V/ i:S,N(A))2-SN()) БО(Л),Т),V / i: S, N (A)) 2-SN ()) BO (L), T),

.где Bo(V,T)j1-exp -- -. Where Bo (V, T) j1-exp - -

- коэффициент Бозе-Эйнштейна, учитывающий коррел цию эмиссии фотоновj О - оптическа частота излучени ; { - чабтота, на которой изме (Р етс электрический сигнал. При использовании только части потока фотонов, что имеет место на прак тике при измерении температур пирометрами излучени и с учетом величин спектрального коэффициента излучени объекта С, коэффициента пропускани средыСд), квантового выхода (1) и коэффициента усилени М примен еглоГо приемника излучени соответствующи-е выражени дл регистрируемых оте неквадратйчной величины тока шумач/Л и среднего значени фототока Лс с коэффициентом шума (5 на выходе приемника, исход из (1), имеют вид (V)-nW) .(Botl)лf 2 3(.,--e-N(-v), где к - константа пирометра, величина которой.зависит от показател визировани и диаметра входного зрачка (обычно К«1) д - эффективна й ширина частотной полосы, в которой измер етс мощность шума; . . С- зар д электрона. .- Bose-Einstein coefficient, taking into account the correlation of photon emission; O - optical radiation frequency; {- frequency at which the change (P is an electrical signal. Using only part of the photon flux, which takes place in practice when measuring temperatures with radiation pyrometers and taking into account the values of the spectral emissivity of object C, transmittance C), the quantum output (1 ) and the gain factor M of the application of the radiation detector of the relevant expressions for the recorded square values of the noise current / L and the mean value of the photocurrent LS with the noise figure (5 at the receiver output, starting from ( 1), have the form (V) -nW). (Botl) lf 2 3 (., - eN (-v), where k is the pyrometer constant, the value of which depends on the sighting indicator and the diameter of the entrance pupil (usually K 1) e is the effective width of the frequency band in which the noise power is measured; .. C is the electron charge.

(2) и (3), наИспользу выражени ходим(2) and (3), on Using expression we go

5five

2 ), 2)

откудаfrom where

Claims

VOSPT -T-GU N To determine the temperature of an object, change the average square of the noise current 5 and the average photocurrent Lc at the output of the radiation receiver and by their ratio find the Bose-Einstein coefficient value,), which uniquely determine the actual temperature of the object. The proposed method makes it possible to exclude the effect of a change in the radiating ability of the object and pro-. starting the medium on the measurement results and thereby increasing the accuracy of measuring the temperature of the object being sighted. Claims The method of measuring the temperature of heated objects to their radiation, characterized in that, in order to improve measurement accuracy, the root-mean-square current caused by excessive photon noise is measured, and the average value of the photocurrent and the desired temperature are determined by their ratio. Sources of information taken into account in the examination 1.Gordov A.I. Fundamentals of pyrometry M., Metallurgists, 1971, p.412.

2. Authorship certificate of the USSR h 437928, cl. GOI J 5/00, 1974,