Authors

  • Madmarova Umida Abdukarimovna
    Senior Lecturer, Department Of “Metrology, Standardization And Product Quality Management”, Fergana Polytechnic Institute, Fergana, Republic Of Uzbekistan

DOI:

https://doi.org/10.71337/inlibrary.uz.ijasr.130878

Keywords:

Generator gas chamber wavelength

Abstract

The article considers a gas analyzer based on an optoelectronic two-wave generator in which optical feedback is used through a gas chamber. At the output of the generator of a positive pulse, optical feedback is provided at a wavelength of l1 and at a negative one - l2.


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Volume 03 Issue 01-2023

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International Journal of Advance Scientific Research
(ISSN

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VOLUME

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Pages:

58-64

SJIF

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A

BSTRACT

The article considers a gas analyzer based on an optoelectronic two-wave generator in which optical
feedback is used through a gas chamber. At the output of the generator of a positive pulse, optical feedback
is provided at a wavelength of

1

and at a negative one -

2

.

K

EYWORDS

Generator, gas chamber, wavelength, LED, divider, impulse, radiation, spectral characteristic.

I

NTRODUCTION

With low requirements for control devices, a
simple optoelectronic two-wave generator circuit
can be used. Two-wave optoelectronic generators
with two optocouplers can be successfully used to
create portable gas analyzers for continuous
monitoring of the degree of environmental
pollution [1-7].

T

HE MAIN PART

The structural gas chamber of the optoelectronic
two-wave generator is a hollow tube (Fig. 1), the
inner surface of which has good reflectivity. At
one end of the gas chamber, semiconductor
emitters SD1 and SD2 are installed, respectively,
with radiation wavelengths of

1

and

2

, and at

Journal

Website:

http://sciencebring.co
m/index.php/ijasr

Copyright:

Original

content from this work
may be used under the
terms of the creative
commons

attributes

4.0 licence.

Research Article

APPLICATION OF OPTOELECTRONIC TWO-WAVE GENERATOR


Submission Date:

January 20, 2023,

Accepted Date:

January 25, 2023,

Published Date:

January 30, 2023

Crossref doi:

https://doi.org/10.37547/ijasr-03-01-10


Madmarova Umida Abdukarimovna

Senior Lecturer, Department Of “Metrology, Standardization And

Product Quality Management”, Fergana

Polytechnic Institute, Fergana, Republic Of Uzbekistan


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the other end, a photoresistor FR is installed, the
spectral characteristic of which allows recording
radiation from both sources. The choice of source
type with the corresponding

1

and

2

is

determined by the spectral characteristic of the
controlled gas component [8-24].

A schematic diagram of an optoelectronic two-
wave generator is shown in fig. 2. The principle of
operation of the generator is based on the use of
a photoresistor in the feedback circuit, optically

connected through a controlled medium with an
LED connected in anti-parallel at the output of the
generator [25-41].

In the absence of a controlled substance (gas,
smoke, etc.), by turning the knobs of the variable
resistors R

1

R

2

and selecting the divider R

4

and R

5

at the output of the amplifier, the pulse durations
of positive and reverse polarity are equal.

Fig.1. The design of the gas chamber of the gas analyzer.

In the presence of a controlled substance, the
duration of a pulse of one polarity changes. The
duration of a pulse of a different polarity depends
on the values of non-informative parameters,

since the wavelength of this LED lies outside the
absorption band of the controlled parameter.


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Fig. 2. Schematic diagram of a gas analyzer based on an optoelectronic two-wave generator.

Thus, the generator continuously generates a
periodic sequence of rectangular pulses of
different polarity [42-57]. The duration of a pulse
of one polarity, for example, positive, depends on
the controlled parameter, and the duration of a
pulse of negative polarity depends on non-
informative parameters (for example, when
monitoring gas contamination, pollution, etc.). It
should be noted that when the background
illumination and temperature change, only the
pulse repetition frequency of the generator
changes and the ratio of the pulse durations of
positive and negative polarity depends only on
the value of the controlled parameter.

To implement the ratio of the durations of these
pulses, a device made on a field-effect transistor
VT

1

and an operational amplifier D

2

is connected

to the output of the D

1

microcircuit. The

separation of pulses of negative and positive
polarity is carried out by diodes VD

3

and VD

4

.

Further, the separated pulses are integrated by
the chains R

6

C

2

and R

7

C

5

. The value of the

controlled parameter is recorded by the
measuring device - power source.

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References

Xabibulloogli, E. A., & Abdukarimovna, M. U. (2021). Assesment of metrological reliability of measurements using the method of producing functions. Academicia: An International Multidisciplinary Research Journal, 11(8), 520-528.

Ergashov, K. M., & Madmarova, U. A. (2020). Technics of the infra-red drying of farm products. Academicia: An International Multidisciplinary Research Journal, 10(11), 1351-1355.

Ibrokhimov, J. M., & Madmarova, U. A. (2020). Process automatic control system on the basis intellectualop to electronic the sensor control. Academicia: An International Multidisciplinary Research Journal, 10(11), 1318-1322.

Yuldashev, K. T., Ergashev, Q. M., Ibrokhimov, J. M., & Madmarova, U. A. (2019). EJ Alikhanov The study of Stability Combustion of the Gas Discharge in Sub-micron Gas-filled Cell with Semiconductor Electrode. International Journal of Advanced Research in Science, Engineering and Technology, 6(11), 11907-11911.

Madmarova, U. A., & Abdumalikova, Z. I. (2022). The design of printed board drawings. American Journal of Applied Science and Technology, 2(07), 15-22.

Abdumalikova, Z. I. (2021). Manifestation of Sources of Uncertainty in Measurements. Central Asian Journal of Theoretical and Applied Science, 2(12), 301-305.

Rustamov, U. S., Isroilova, S. X., & Abdumalikova, Z. I. (2022). Mikro-GES va fotoelektrik quyosh elektr stansiyasiga asoslangan kombinirlashgan (aralash) avtonom energiya manbalarining kompyuter modeli. Oriental renaissance: Innovative, educational, natural and social sciences, 2(3), 710-719.

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