Here are a few photos taken during the Haptics Class Project Demonstrations on April 27, 2012.
Exploration of A Variable Firmness FoamThis project explored methods to create a variable firmness foam. The first method consists of a pancake solenoid controlled by varying the voltage applied. The second method consists of wood plates backed by varying volumes of foam. A JND for each device was determined by the method of continuous stimulus and a comparison to a midrange control stiffness for each device. Seven subjects were testing having ages from 21-27. The subjects included 2 females and 1 left handed male. An ANOVA analysis was performed to assess the capability of each method. The foam device was shown able to display three firmness values between approximately 175.2 and 383.2 N/cm as compared to a 262.8 N/cm control firmness. Analysis of the data from the solenoid device showed that the change in firmness produced was not enough to be percieved by our subjects using a range of 87.59-111.7 N/cm, using the 97.45 N/cm as our control comparison firmness.