SU1123357A1 - Method of measuring temperature of black body model - Google Patents

Abstract

A METHOD FOR MEASURING THE TEMPERATURE OF THE BLACK TEPA MODEL, including sighting a black body model, identifying two spectral components of a black body radiation at wavelengths A, and 2 spectral intervals 0.2-0.8 µm perceived by the radiation receiver, and measuring the signals of the radiation receiver proportional to the intensity m spectral components, distinguished by the fact that, in order to increase accuracy, they detect the source of synchrotron radiation, allocate spectral components at the same wavelengths (and Lg measure the signals of the receiver and radiation proportional to the intensities of the selected spectral components, and the temperature T of the blackbody model is determined by the formula D.) Г5йг15 (П Le4vr5uril7 l J. Where C is Planck's second constant; 5 (Ti,), 5 (;) are signals radiation receiver when viewing black body models corresponding to the spectral components at wavelengths A, and - respectively; 5 (L ,, 5 (D, y are the signals of the radiation receiver when viewing a source of synchronous radiation, corresponding to spectral components at IvD wavelengths, and lied up responsibly.

Description

one

H3o6f eTeHHe belongs to the field of radial pyrometry and can be used in precision temperature measurement tools that are included in the complex of standards of energy photometry, radiometry, in particular, dp of reproducing units of light quantities, such as candela.

There is a known method for determining the temperature of a black body model (MCT), containing the operations of directing the radiation flux from the cavity of the studied MCT, having a temperature T, to the spectrometer, measuring the monochromatic brightness of the MCT at a wavelength of 9, in the wavelength range of 0.30, 7 µm, in which the relation of Wien is true, and the monochromatic model brightness value is measured at a different wavelength in the range of dpin waves in the infrared region of the spectrum. Then, the temperature MlT is changed to the value T and the indicated operations are repeated. The monochromatic ratios are calculated at two specified temperatures, the values of temperatures T, and T, are determined by solving the system of equations.

A disadvantage of the known method is the low measurement accuracy due to the low measurement accuracy of monochromatic radiation in the infrared region of the spectrum with the existing hardware implementation.

The closest to the invention to the technical nature is a method for measuring the temperature of an MCT, including sighting an MCT, isolating two spectral components of a black body radiation at wavelengths f (and from a spectral range of 0.2-0.8 µm perceived by the radiation receiver, and measuring signals a radiation receiver proportional to the intensities of the spectral components.

The temperature is found from the signal ratio.

The disadvantage of this method is the low power of temperature measurement, since the use of non-selective heat receivers in the specified spectral range is almost impossible due to their low sensitivity, the use of highly sensitive selective 233357

photoelectric receivers cause them to be calibrated, associated with the existing temperature. Perutory scale, which increases

5, the temperature measurement error, as a result, even for reference means, it is 0.1%.

However, for the measurement methods used in the reproduction standards of radiometric units, the accuracy achieved is insufficient.

The purpose of the invention is to improve accuracy.

The goal is achieved

5 by the fact that in the method of measuring the temperature of an MCT, including the sight of an MCT, the selection of two spectral components of a black body radiation at wavelengths of 9, and, from the spectral range of 0.2-0.8 µm perceived by the measurement receiver, and the measurement of the signals of the radiation receiver proportional to the intensities of the spectral components, observe the source of synchrotron radiation (si), select the spectral components at the same wavelengths L and measure the signals of the radiation receiver proportional to the intensities of the selected spectral components. x component MCHT in temperature T is determined by the formula

---

H

h T-ép 51MMM (35

B (, and (,) uj j

where Ca is the second Planck constant; (il. S (.) signals of the radiation receiver when sighting the MCT, corresponding to

spectral components at lengths of warrior D, and L 2, respectively;

6 (A, 1.5 (Ti)) are the signals of the radiation receiver when sighting the SR source, corresponding to the spectral components on the spins of the waves L, and respectively.

The drawing shows a schematic diagram of the implementation of the method. From the MCT 1, the radiation enters the rotary photometric sphara 2, which is together with the monochromator 3, at the output of which the radiation receiver A is installed, a spectrometer.

3

The photometric sphere 2 also receives radiation from the source of the SR through channel 5 of the electron storage ring 6.

The method is carried out as follows.

in a way.

MCT 1 is outputted to a predetermined temperature mode and directs the radiation flux on the cavity of the studied MCh into the spectrometer, for which I rotate the photometric sphere 2 using the rotational drive of the photometric system 7 by the inlet to the side of the MCT 1. By means of the rotational drive 7, wavelength range of 0.2–0.8 µm, in which the Wien formula is valid, and the signal of the radiation receiver 5 is measured (The wavelength is changed in the same wavelength range using a monochromator 3, the wavelength Aj is determined radiated With the rotation drive of the photometric system 7, I rotate the photometric sphere 2 with the inlet to the 5 SI channel from the electron accumulator 6, sending the SR to the same spectrometer and measuring at the wavelengths A and I 2 the signals of the radiation receiver 6 (, and SCftiloT SI.

The value of the temperature of the MCT is determined taking into account the measured signals according to the above dependence.

This dependency is as follows.

In the Wien region, the ratio of the signals corresponding to the spectral components derived from the radiation of the MCT is determined by the formula Cr1 Q (AO irt r4TfcgJ QuJ where CH (,, 0 (the spectral sensitivity of the spectrometer at wavelengths a 2, respectively;; spectral intervals of the radiation about the wavelengths D, and, respectively. The spectral flux of SI R in the limiting cases with wavelength) 6b T1 7 s, where c is more critical

123357

ka wavelength SI (B is the energy of electrons; And is the intensity of the magnetic field), is:

where J is the current; iA is the spectral interval.

The polarization averaged over all angles and energy is 50% for this case. Using the integrating sphere eliminates the dependence on the angular distribution of the SR, the ratio of the signals of the radiation receiver corresponding to the spectral components of the SR takes the form

5 (-x.1 QM. (

(((L (XgG

Thus, we find that from the ratio of the spectral components 5 (T,)

 for mrt and ie for

SI can be determined by the formula T

p y.f rrfnf b l Cn J, 5 (ra J

Analysis of the error of this method leads to the following equation:

  H (to Mk

Tlr rr Tl J 1 g)

, where CrC-X, - h / Aae / j 2. T-. 8С UUJ J xUil J g, Eh GUSHIYZTS 4 (t-GT LX L2) J at the temperature value of MCT 3000 K; , 0.35 microns; . µm ..- o, o (7o;, 9k, -oG / Y ° 2 (oj46-0, (f + ((. 6-0,, 6-0,, 027% J

51

while in the prototype it is 0.1%.

Thus, the accuracy of this method is higher than the accuracy of the prototype method three times. The use of two calculated sources of radiation of MCT and SI increases the reliability of the method.

The economic effect of increasing the accuracy of measuring the temperature of the MPT is considered on the example of a calibration scheme for light values.

233576

In our country, lighting consumes 13% of the total electricity generated, i.e. not less than 180 billion kW / h per year. Increasing the accuracy of producing a light unit by only 0.1% due to the accuracy of measuring the temperature of the MCT will ensure a reduction in the cost of electricity for lighting in accordance with current standards by 3,600,000 rubles. per year, and the economic effect of the introduction will be 3 rubles.13 kopecks per ruble each cost.

/

Claims (1)

METHOD FOR MEASURING TEMPERATURE- PERSONS OF THE BLACK BODY MODEL, including the sighting of the blackbody model, the extraction of two spectral components of blackbody radiation at wavelengths * λ, and from the spectral range of 0.2-0.8 μm perceived by the radiation receiver, and the measurement of radiation receiver signals proportional to the spec -, sweeping component different in I that, in order to increase accuracy, endorse synchrotron radiation source, the spectral components recovered at the same wavelengths and Ά Ά * ₂ and the radiation detector is measured signals proportional Intensity GOVERNMENTAL selected spectral components, and the temperature of the black body T model determined from the formula C ₂ - Planck's second constant; 5 (^,), 5 (^,) are the signals of the radiation receiver during sighting of the blackbody model, corresponding to the spectral components at wavelengths, and accordingly; 5 (^,), 5 (^,) are the signals of the radiation receiver during sighting of the synchronous radiation source, corresponding to the spectral components at wavelengths Ά, and accordingly.