SU566148A1 - Photoelectric pyrometer - Google Patents

Description

(54) PYROMETER PHOTOELECTRIC

and log reference and measurement signals.

It is better; from the object, while passing through the optic system 1 and the light filter 3 (the sighting platform is made using the field diaphragm 2), falls onto a photo-acceptor 4, for example, a photomultiplier.

From the pulse generator 7, the LED 6, which is set at an angle to the optical axis of the pyrometer, receives a voltage of a stable part and amplitude. The radiation from the light-emitting diode is in the form of light pulses (collected by means of a lens 5 and falls on a photodetector 4, on which a signal proportional to the illumination from the reference source 6 and from the measuring object is extracted. From the photodetector 4 the signal enters a separation circuit, in which A resonant filter is applied. The voltage of the reference signal, which is a component of the voltage corresponding to the radiation from the measured volume, is transferred to the linear pass of its device, the synchronization of which is from the pulse generator. in the stabilized voltage. The selected pulses of the reference and alternating voltage go into a zaphAtic block that performs a division and logarithm operation. An arithmetic unit that performs the division and logarithm operations can be performed, for example, on operational amplifiers.

The presence of voltage pulses, proportional to the intensity from the object of measurement and the reference source of faunne1, makes it possible to determine the toughness of the telesharash) from the following relation

Ef

where TX n Teff is the measured and effective temperature of the source of equilibrium;

h is Planck's constant;

X - effective wavelength ;,

and - voltage on arithmetic device code ..

The presence of a light guide (operating at a modulation frequency of up to hundreds of megahertz, with a modulation depth of 100%, allows you to temporarily increase the resolution of the pyrometer Up to 10 seconds. The absence of a mechanical modulator and motor increases the hope and performance of the pyrometer in any position and in the presence of accelerations .

Using a reference voltage generator with varying frequency and a tunable filter in the separation circuit allows you to quickly change the device speed to seconds.

Claims (1)

Invention Formula Pyrometer fotozlekt1Ya1chesky comprising caiticheskuyu shstemu, filter, etadonnsh source favneni, fotopryemnik of t n and h and w u and uc in that in order to increase the speed, the reference source comparing it vsholnen as svetoizluchatelnogo dyodd optically associated with frtopriemnikom , moreover, a high-frequency generator of stable frequency and amplitude is introduced into the device of the impedance, the dividing chesh installed at the output of the photo receiver, linear transmission scheme, one input of which is connected to the code of the dividing scheme , and each other is connected to a high-frequency generator, the other generator output is connected to a light beam; A 1 cm diode, an arithmetic unit, one of the inputs of which is connected to a separation circuit, the other with a linear transmission circuit.