AN AUTOMATIC SCANNING SYSTEM FOR THE

MONITORING OF FIRES

Andrii Sofiienko

PhD, Chief Physicist,

Head of research laboratory

2011

Ukratominstruments Corporation

TASKS:

The development of the optimal structure

and design of the automated video

monitoring system of fires (VMSF);

Contract from 21.11.08 № 21-4/22, with the MOE of Ukraine "Creating a video monitoring

system of fires in the Chernobyl exclusion zone."

2

BASIC REQUIREMENTS FOR A MODERN MONITORING SYSTEM:

Auto scan mode of the area of interest;

Wide temperature range: -15 0C to +50 0C;

Detection time of the source of fire : 30 s;

Detection distance of the source of fire with a volume

of 3 m3: 15 km;

Transfer all data via radio channel;

Independent power source for 24 hours;

Multisensory system for scanning and detection of

the source of fire.

3

MULTISENSORY SYSTEM TO SCAN AND DETECT THE SOURCE OF FIRE

Current developments in infrared spectroscopy (applied for the

wavelength range 2.5 - 5 microns, which corresponds to the

temperature of the burning of wood) can significantly complement the

existing video monitoring systems of fires, so we can talk about the

new direction in the monitoring – a multisensory control system, which

is based on the analysis of objects in multiple spectral ranges.

4

CCD camera (0.3 - 1 micron) IR telescope (2.5 - 5 microns)

THE STRUCTURE OF THE MEASURING UNIT

The measuring module is an

automated device for finding and

identification of the sources of fires

with the ability to send the photos of

the detected fires via radio channel.

5

FEATURES OF INFRARED TELESCOPE

IR receiver is based on a lead-selenium resistor

with a maximum sensitivity in the medium infrared

range. The most effective spectral range of the

infrared radiation to determine the source of fire

(the average temperature is 800 0C) is 2.8-5.2

m.

The telescope is equipped with a Cassegrain

optical system and performs a spatial selection

of heat sources in the medium infrared range 2.8-

5.2 m. The angular field of IR channel response

is 7 angular minutes.

6

THE MECHANICAL SCANNER

Mechanical scanning device rotates the

telescope in azimuthal plane from 00 to

3600 and produces an offset angle of 7

angular minutes. Full scan cycle ends

when the angle on 70 below the

horizon. The scanner is installed on the

tower at a height of 30-40 m. that

allows to control the territory around by

a spiral from the horizon.

The rate of the azimuthal scan - one

turnover in 10 seconds. The full scan

time is about 5-6 min. 7

DIRECTION FINDING OF THE FIRE

For accurate direction of

the source of fire it is

necessary to use the data

from at least of three

scanning modules.

Preliminary coordinates of

the fire can be obtained

using the two modules.

8

THE MAIN TECHNICAL CHARACTERISTICS

Parameters Value

Number of scanning modules in the system up to 128

The spectral range of IR channel 2.8 – 5.2 m

The spectral range of the video channel (2 Mpix) 0.3 – 1.0 m

Min. temperature resolution of IR channel 0.5 0С

Detection range of the source of fire, V = 3 m3 15 km

Confirmation time of the fire detection 30 s.

The area controlled by one module up to 700 km2

Time transmission of digital images 1 min.

Ability to connect external sensors up to 128

Energy consumption 90 W

Environmental temperature from -15 to +50 0C

9

10

Contact information:

“Ukrainian atom instruments and systems” Corporation

Director General : Petrenko Valeriy Stepanovich

03150, Ukraine, Kiev, Gorkogo str., 152, office 224

Tel/fax: +38 044 5016178

E-mail: info@uap.kiev.ua