VIA Technologies EPIA SN-Series Specifications download pdf (Page 72)

FASTER Engineering Model

Acquisition devices configuration (i.e. aperture and exposure time) is setup via the

camera parameters controller and storage block which also includes the support for

image data saving and download to the G.S; camera parameters are passed to this unit

from the ground equipment which selects the appropriate values for aperture and

exposure time.

Starting from the layout shown in Figure 50 and thanks to previous experiences

gained in previous projects involving sensor integration and data logging, it has been

possible to compile a list of all the necessary hardware for the realization of the FASTER

EM, which is mainly based on the integration of COTS (Commercial Off The Shelf)

components. As a matter of fact, after a series of trade-off, it was decided to use PC

boards both for sensors acquisition and camera control in order to concentrate only on

developing the necessary software.

In the next section the hardware list and the proposed layout will be discussed

describing all the selected components and their electronic and electric interconnections,

while Section 6.5 will be focused on the design of the software environment which has

been developed using the Matlab/Simulink package.

6.1 FASTER EM Hardware layout

The FASTER EM hardware layout is presented in Figure 51. All the components,

except the Canon EOS 450 camera which is contained in the external pod, are installed

inside a 19 inch, 2 unit aluminum rack box. In the diagram, boxes represent the physical

instrumentation while arrows, in different colors depending on the connection type, show

the connections between each subsystem:

 Red lines are used to identify power connections;

 Black lines for point to point RS232 serial connections;

 Green lines for high speed USBs (Universal Serial Bus);

 Violet lines for 100 Mbit/s Ethernet connections,

 Orange lines represent two G.P.I.O (General Purpose Input-Output)

connected to a parallel port on the PC/104 board

 The blue line is the VGA connection between the Windows based VIA EPIA

and the LCD screen

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VIA Technologies EPIA SN-Series Specifications Page 72