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Results of experimental researches of extending of carbonic oxide WITH

Transition to application gazochuvstvitelnyh sensor controls-measuring instruments of concentration of carbonic oxide WITH in systems of ecological safety allows to detect carbonic oxide at an early stage when it is possible to take measures on a stop of dangerous process and to prevent the ecological

Catastrophe (for example to disconnect a food and to shut down dangerous excessive heating of conducting).

In a source monoksida carbon (carbonic oxide) concentration WITH attained values 25-30 ppm. For convenience relative concentration further was used WITH.

Definition of relative concentration WITH at removal from a source of toxic gas is carried out by formula: With = SH / Gmax, where SoYOotnositelnaja concentration WITH; SH - concentration WITH on distance h from a source; Omax - concentration WITH in a source. Distribution WITH in space is influenced by speed of air weights around an ignition source. 11ри a zero speed of air weights decrease in concentration WITH depending on distance can be defined under the drawing (fig. 4.15), gained by experiments. Data are resulted more low in table 4.2. Also it was important to gain dependence of a gradient of concentration on distance on an ignition source. This dependence is resulted on fig. 4.16.

At the first stage dependences of concentration WITH depending on distance from an ignition source have experimentally been defined. Definition of relative concentration WITH at the expense of removal from an ignition source is carried out by formula: With = SH / SB, where With - relative concentration WITH; SH - concentration WITH on distance h from a source; SB - concentration WITH in a source. Distribution WITH in space is influenced by speed of air weights around an ignition source. 11ри a zero speed decrease in concentration WITH depending on distance can be defined under the drawing (fig. 4.15), gained by experiments. Data are resulted more low in table 4.2. Also it was important to gain dependence of a gradient of concentration on distance on an ignition source. This dependence is resulted on fig. 4.15.

Table 4.2.

Dependence of relative concentration WITH from distance from a source

Drawing 4.15. Change of relative concentration WITH depending on

Distances from an ignition source.

Also the problem about approximation of this dependence by a polynomial of the second order has been solved

With = а2х2 + a1х + а0. (4.1)

For a finding of constants a0, a1, a2были boundary coditions are formulated.

1) At х=0, С=1, then

a2x2 + arx + a0 = 1

α0 = 1

2) Iri х=40, С=0,3

1600α2 + 40α1 =—0,7

3) Iri х=15, С=0,6

225 ѕ + 15α1 =—0,4

4) Solving system of the equations

Ioluchim:

а2 = 0,00037

a1 =—0,0325

As a result the equation has been gained, allowing to define concentration WITH depending on distance from a source of toxic gas.

WITH = 0,00037%2 0,0325 % + 1

Also dependence of a gradient of concentration on co-ordinate h has been defined.

Io to the gained expression the schedule of dependence of a gradient from distance to the ignition nucleation site for (fig.

4.16 see) has been builted. The maximum value of a gradient equally 0,00325, and at removal on 80-90 m from a source a gradient is aimed to null.

Drawing. 4.16 Change of a gradient of concentration WITH depending on

Distances from an ignition source.

The carried out researches have shown, that the concentration gradient changes as a function of distances to a source of toxic gas. It is possible to gate out at least two areas: I - area with high level of a gradient (0-40м); II - area with low level of a gradient (40-80м). It is necessary to apply different strategy of traffic To each of these areas on a gradient. Therefore, for a finding of the azimuth matching to a traffic route on the maximum concentration WITH, it is necessary to develop a method of definition of concentration WITH in points at installation traffic on the closed path and to study agency of the parametres defining traffic of the aircraft on this path.

For effective sounding of space for the purpose of a finding of values of concentration in the set points, the optimal is the round which has been had in a horizontal plane. At conducting of experimental researches, definition of quantity of points on a path in which is important measurement of concentration is made WITH.

According to strategy of a method of Kiefer-Volfovitsa at sounding of space and traffic on a gradient towards increase in concentration WITH expedient to change the space step, that is to our case radius Rокружности taking into account magnitude gradientav to a sounding point. That is it is necessary to find dependence of an aspect:

Presence of a gradient of concentration WITH and possibility of measurement of this parametre by means of a mobile sensor control allows to find a source of toxic gas precisely. Even on distance of 60-90 metres it is observed raised kontsentatsija WITH, that allows to move on a gradient of concentration towards concentration increase.

4.5

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A source: Polyakov Roman JUrevich. the MOBILE INSTRUMENT PLATFORM FOR SYSTEM of ECOLOGICAL MONITORING of POLLUTION by TOXIC GASES of the FREE AIR. The DISSERTATION on competition of a scientific degree of a Cand.Tech.Sci. Kursk - 2019. 2019

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