SU241752A1 - DEVICE FOR MEASURING TRUE TEMPERATURE ON FLOWS OF OWN AND REFLECTED RADIATION - Google Patents

Description

In known devices for measuring true temperature simultaneously with conditional temperature, luminance or color, the reflection coefficients are measured, from which the corresponding values of emissivity are determined.

For real emitters with an imperfectly mirror or diffuse reflecting surface in such a pyrometry method, it is of fundamental importance that the direction of the radiation fluxes (incident and reflected) be identical with the line of sight.

At the same time, the reflected radiation flux must be perceived by the radiation receiver along the same direct sight along which the incidental radiation note is directed from the source of the modulated radiation. The pyrometer should be seen in the same direction in order to perceive the surface's own radiation, the true temperature of the crust measured.

The proposed device for measuring the true temperature solves this problem. Unlike the known ones, it is provided with a partially splitted optical fiber, the unsplit end of which is directed to the surface under study, and the ends of the split end, respectively, to a reference radiation source with a modulator and a radiation receiver.

In this case, the fiber is split so that at its forked ends the radiation fluxes are identical.

The drawing shows a device for measuring the true temperature.

The device contains a light guide C, the fibers of which are divided into two beams Ci and Cr in such a way that at the outlets of their end parts TI and TZ streams are strictly identical. With

this, depending on the need, they provide images that are mutually pleasing each other and the image at the input of the light guide. The images at the outlets may be absent, since the fibers in the Ci and € -2 fibers are identically disordered.

The end of the optical fiber Ci is directed to a modulated radiation source L with an A4 modulator, which creates a radiation flux that emerges from the end T of the optical fiber and falls on the self-radiating surface under study I. Reflected by the surface And the flux of the modulated radiation enters the optical fiber through the lens O and at

Receiver P with Amplifier U tuned to the modulation frequency.

Simultaneously with the flux of reflected radiation through the Cz optical fiber, the receiver P (or a special receiver) perceives the flux in a proper way. In the proposed device, the reflected flux and the flux of own radiation are perceived from the same surface area at the same angle.

For the continuous monitoring of incident radiation, various known constructions can be applied in this device, for example, a structure consisting of an additional Co fiber and two retractable (when measuring the reflected radiation flux) mirrors 3i and 3.

Subject invention

An apparatus for measuring the true temperature from the fluxes of intrinsic and reflected radiation, comprising a reflectometer and a pyrometer with a reference radiation source and l-gulator, a radiation receiver and a measuring circuit, characterized in that, in order to ensure the coloration of the direction of the incident and reflected radiation with the line of sight , it is equipped with a partially splitted light guide, whose split end is directed to the surface under study, and the ends of the split end are directed respectively to the reference radiation source with modulator and radiation receiver.