|
|
|||
 |
 |
||
|
Operational tests
At the frames of the
STCU P389 R&D project some operational tests of the developed
principal prototype were conducted. According to the system
specification the main distances for imaging were selected as 1,5 m,
3 m, 6 m. For this aim three replacing focusing lenses with
appropriate focal distances were utilized, which were placed in
front of rotating antenna unit.
The main tests were
provided for indoor conditions (i.e. at laboratory rooms and other
permissions with and without windows). But separate tests with
specified focal
distance were provided also at outdoor conditions at summer time. Additionally some tests
were provided for very short distance as 0,75 m at
indoor conditions - at this case two lenses with focal distances as
3 m and 1,5 m were placed serially in front of rotating antenna.
It needs to be mentioned that for indoor conditions maximum natural
temperature contrasts for human body are near 17 C degrees (i.e. 37
C temperature of human body and 20 C degrees temperature of
background equal to air temperature). At hotter air temperature
contrast is reducing. Taking into account that emissivity of human
body (skin together with fat under skin) at W-band is near 0,6, real
contrast is reducing to 10 C. Additional reduction of the contrast
should be caused by losses of clothes on the body. So deficit of
radiometric sensitivity during experiments is evident. Situation may
be improved due to sensitivity improvement. Some ways for this task
realization have
been discussed at other parts of this web resource.
The main results of the experiments for different distances are
presented at the next pages.
Video Illustrations are presented at two forms: i) standard
Microsoft video format (*.avi) and ii) Flash video format (*.swf).
They have been initially tested for playing in the next browsers:
Microsoft Internet Explorer (both formats are suitable), Google
Chrome and Mozilla FireFox (Flash video only is supporting).
Illustrations at focal distances: |
|||
|
|
|||
