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New depth sensors such as the one embedded in the MS Kinect system work in real-time, enabling to create an instant 3D scan of objects. In this project, we are exploring a large-scale installation that demonstrates this by a 400+ array of motors and LEDS. This work includes interaction design, hard-coding and lots of soldering etc. The result will be put on exhibit on various international shows.(Expert: Jouke Verlinden)

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De meningen ge-uit door medewerkers en studenten van de TU Delft en de commentaren die zijn gegeven reflecteren niet perse de mening(en) van de TU Delft. De TU Delft is dan ook niet verantwoordelijk voor de inhoud van hetgeen op de TU Delft weblogs zichtbaar is. Wel vindt de TU Delft het belangrijk - en ook waarde toevoegend - dat medewerkers en studenten op deze, door de TU Delft gefaciliteerde, omgeving hun mening kunnen geven.

Posts by N.M. Noordam

Project Evaluation


We all chose this minor because we like to build
things and that’s exactly what we did at this assignment. But it would have
been nice if we also learned some more about the programming as well. We were
just too busy building prototypes.

Nevertheless this was a fun and instructive project to
do. We were able to actually face real-life problems for example producing the
Led-diffusers. Something in theory can seem quite easy,
but when you scale it up to 400 Led-diffusers the costs suddenly either
sky-rocketed or the production time would become way to long! In the end we
believe we found a good solution to the problem and were happy to show of our
final project.

This project isn’t over yet! We knew from the start
that it would be highly unlikely that we would have been able to deliver a
finished product in just four weeks time. Besides the delay in the delivery of
the electronics there are still some minor issues we need to work out. For
example the assembly of al the pixels and the construction of the actual frame.
This project may technically be over, but we hope to keep contributing to the
project and be able to assemble the actual kinetic mirror early next year!

 

Science Fair

(unfortunately the picturs do not yet work, will be updated soon!)

Despite that the 400p kinetic mirror was not
completely finished, the science fare was a great success! We did have a lot to
show, for instance a scaled version of the final frame. We made this small
frame out of steel beams with bolts as connection points, so we could show
those interested how our final frame could be diss-assembled. On the bottom
plate there is room for the powersupply, mac mini and some watertanks for
ballast.


Besides this small protoype, we made a big mock-up of the real frame, to show
the actual dimensions of the 400p version. Inside this pixelframe we placed a simple
white screen so we could project virtual pixels, in this way we could show the
guests a virtual model of the 400p mirror. The beamer was connected to the
Kinect and the Mac mini, the virtual pixels were created by the same software
that will eventually drive the motor fader pixel, so our virtual display was
allready modeling the persons standing in front of it. If the user interacted
with the Kinect-sensor this would be realtime projected on the screen. Bellow
is a photo taken when someone placed his arm in front of the Kinect sensor.


We also showed the original prototype with 12 pixels and our new led diffuser
caps. By switching power on and off, this prototype kept initiating the
start-up check over and over again to show the moving and flashing pixels. Next
to this we played a movie of the 12p prototype reacting on the movement of the
yellow towel.


All these elements together gave the guests a good picture how the 400p version
would be in reality.

It was interesting to see what our fellow students worked
on this period. All the stands looked great!

Digital Mock-up

Been working on a digital mock-up of the installation. Trying to get a feel for the size and shape of the display and the frame that will support it.

 

 

Program of demands

Finished writing our program of demands this morning. Now onto the design and the bill of materials!

 

 

Program
of demands – Kinetic mirror
Number Item Explanation
1 Dimensions The
mirror consists of 400 linear motor faders ordered in a widescreen format of
16 by 25. Just looking at the pixels this gives us a moving surface of 100
wide by 64 centimeters high. The frame will encompass this surface and place
the screen at eyeheight. The entire display should be able to fit inside the
trunk of a volvo v70 (1.13 by 2) or inside an aircraft cargo container.
2 Force
handling and stability
The
frame has to be strong enough to handle the worst-case scenario: 400 linear
faders that shoot from one end of their 20 cm guide rail to the other with
200 cm/s
3 Mobility Either
the frame can be taken apart and stored in several cases for transport. Or
the frame itself becomes a single storage unit. 
4 Budget The
entire project has a budget of 9800 euro’s. Subtracting from this the cost of
the linear faders and the PCB’s there remains between 800 and a 1000 euro
available for the frame
5 Ease
of build
We
are on a limited timeframe, so the entire construction would have to take
place in 2 weeks. If possible we are going to use as much off the shelf
material as possible
6 Power
usage
Preliminary
estimation of the power requirements for the entire display comes to about
1500 Watt. This will be delivered by computer power supplies.
7 Acces
to individual parts
In
the optimum case it would be possible to change a single broken fader without
disassembling the entire structure. There also has to be easy acces to the
kinect, power supply and pc inside the frame.
8 Interactie Interaction
between the display and passersby is handled by a combination of the xbox 360
Kinect hooked up to software running on a mac mini. The kinect is capable of
processing a 3D environment between 1.2 and 3.5 meters from the device, it
has a horizontal range of 57 and a vertical range of 43 degrees. Interaction
between the passersby and the mirror increases if the distance between the
scanned person and the mirror becomes smaller.
9 Appearance Should
be clean (white) and futuristic. As little should distract from the mirror as
possible.
10 Weight Heavy
enough to stop the vibrations caused by the linear faders, but light enough
to be transported by car or by air transport.

 

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