knitting machine at theTextielLab in Tilburg, whereI collaborated with knitweardeveloper Jesse Asjes. Thecardigan is made of high-quality wool combinedwith sensing areas that areknitted with conductiveyarn. The garment isconstructed from variouspanels that are cut and thensewn together.
Did anything go wrong?
Martijn: Evaluating theplacement and sensitivity ofthe sensors was quite hard.
We tested the cardiganand software ourselves,but in the real contextthe parameters were ofcourse totally different.
Further, designing thesound feedback so thatit makes sense is still achallenge. In the beginningwe used a discretemapping; for example,three piano sounds for anarm movement. Later wemoved to more continuousmappings (volume andpitch).
Pauline: Obviously there’s alot of experimentation goinginto the development of theknit, first of all, determiningthe right placement of thesensors, and trying outvarious types of yarns andstitches as well as textures.
After creating the first
mock-up it turned out that
the sensors weren’t working
well, so we had to adapt a lot
of things, like the way the
sleeve is constructed. Later
on in the process we also had
to change the dimensions of
the knitted panels to improve
the fit of the cardigan.
As told by Martijn ten
Bhömer and Pauline van
Dongen, Eindhoven University of
DOI: 10.1145/2641396 COPYRIGHT HELD B Y AUTHORS
SEPTEMBER–OCTOBER 2014 INTERACTIONS 13
→ The application of Vigour
contains a calibration feature to
adjust the sensors to the body
and posture of the user.
→ In between production cycleswe tested the garment withphysiotherapists of eldercareorganization De Wever.
→ The sensors are locatedunder the arms and on the lowerback. These locations allow thephysiotherapists to monitor themost common exercises.
→ The electronics are placedin soft 3D-printed casings thatfollow the shape of the shouldersand back.