Feedback for Human Motion
Early in the summer of 2014 I, Jo Leng, was involved in a pilot knowledge transfer scheme at Leeds Hospitals. As part of this scheme I spent a day in the diabetic foot clinic. Earlier that year I also heard anecdotally of a biomechanical research group tried to educate children about arthritis by attaching small bells to their knee or hip and asked them to complete a task such as crossing a room without making the bells ring.
From this I became interested in how people could be given feedback on their motion. I looked at electronic systems that may allow this by creating a sound. While it seems that this is possible it would have taken longer than ASMbly 2014 would allow so I switched my attention to another technique for understanding motion.
Strobe Light Reveals Natural Motion
I then became interested in using a strobe light to reveal the a fast moving natural phenomena i.e., the flow of a fine jet of water. To explore how this works she created a water feature that was then illuminated with a strobe light. While this is not really a biological phenomena a strobe light can be used to reveal the motion of relatively fast moving biological systems or organisms i.e., the strobe light can reveal feature of human motion that are not obvious under normal lighting conditions.
Unfortunately it is extremely dofficult to get good photos and video footage of this effect because the shuter of the camera is not in phase with the strobe lighting.
The prototype was develop with garden hose. The water feature was designed so that jets of water would collide and so that the jets of water and droplets could be seen as they fell into a rfesevoir of water. The feature under stobe lighting turned all the jets of water into fast moving streams of droplets while, colliding droplets could be clearly seen and the resulting splatter pattern was observable a similar effect could be seen when the droplets fell into the resevoir and occassionally a crown like structure could be observed as the droplet dispersed a ring of water.