SOURCEFORGE » RALF » 2015 Satellite emergency small terminal

h1. Mecanical diagram

The mechanical design started by being provided the rugged suitcase. We were asked to make the system so it fits inside this suitcase.

At this time, we already knew what equipment we wanted inside, so we made a rough model of what we could do using the CAD software Solidworks.

A few devices were either standard ones (like an RJ45 connector) or widely known (like The Single-Board computer, the raspberry pi). It enabled us to get precise CAD models, mainly from the GrabCAD website.

The rest was roughly made (white-boxing stage only) using measured dimensions from the real device.

!http://tof.canardpc.com/preview2/23fdbeb2-61c2-4031-912d-8b018dd4e8ac.jpg! !http://tof.canardpc.com/preview2/46134108-d76e-4667-a825-8958b3514b7b.jpg!

The architecture is centered around a wooden plank, measuring 450x340x10mm, using material courtesy of the DMSM composite department.

We then rectified to the desired dimensions ourselves. The plank is surrounded by foam, which acts both as a lock (holding the plank in place at the center of the suitcase) and as a damping part.

That way, we are shock resistant.

!http://tof.canardpc.com/preview2/fa59a4a8-dc46-4aa1-afcc-324bba8106a4.jpg! !http://tof.canardpc.com/preview2/e02ad491-72e1-49e9-b1e8-28d01808e36a.jpg!

Then we chose to hold every device that needed to be integrated in place using plastic collars. 

It required to pierce holes in the plank, which was done at either 9mm or 12mm of diameter, depending on the collar that needed to go through.

Here is the box before integring the various devices that we wanted in.

!http://tof.canardpc.com/preview2/f9b18b1e-7eb7-444b-990c-4e4fd7e3bb63.jpg! 

Here is an idea we had, that was to put Velcro on our devices to hold them.

For a long time it seemed like a very good solution (with the possibility to remove the various devices.

Bus that solution was finally rejected in favor of the plastic collars.

!http://tof.canardpc.com/preview2/53af1f4a-0d29-451f-91ef-02c04a1c6436.jpg!

Here is the raspberry pi case before assembly.

!http://tof.canardpc.com/preview2/806fa48a-77de-48ae-810f-cb7be2bf9aee.jpg!

Here is the box once completed (later on, the test revealed that we needed to change the IP phone, and those photos were taken before that)

!http://tof.canardpc.com/preview2/dd8044fa-7af1-4663-8708-f925b875dbd1.jpg!