Using an Infra-red Sensor to Measure the Dynamic Behaviour of N2O Gas Escaping Through Different Sized Holes - Technologies for Medical Sciences - page 165

0 degree 90 degree

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0 degree 1

90 degree 1

0 degree 2

90 degree 2

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0 degree 3

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90 degree 3

0 0 0
time [s]

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0 0 0
time [s]

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Comparison between the plots of 0 ı and 90 ı with the hew test arrangement

Fig. 12

180 degree 270 degree

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180 degree 1
180 degree 2

270 degree 1
270 degree 2
270 degree 3

180 degree 3

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0

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0 20 40

time [s]

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0 20 40

time [s]

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Comparison between the plots of 180 ı and 270 ı with the new test arrangement Fig. 13

From Fig. 13 , it can be seen that the results have also changed considerably when
compared to the previous ones. Now there is a big difference between the curves of
180 ı and 270 ı (Fig. 13 ).
Figure 14 shows a new reference system that was adopted in order to create an
easier and simpler code for a proposed measuring/recording programme that would
be used to indicate the possible position and probable size of leak in the “colon”.
It maintains the same previous functions for each inlet and outlet presented in the
testing ring, but with a difference in the angles. Instead of counting from 0 ı to 270 ı ,
it will be divided in positive side and negative side, going from 0 ı 180 ı

to C and

from 0 ı to 180 ı .