RESi

Frequency-Based Design of Smart Textiles

“…Alternatively, the sensor might require a flat surface to function (e.g. [22,29]), or the interaction would require a specific textile deformation (e.g. [15]).…”

“…While in some cases they show that the textile can be deformed (e.g. [22]), it is unclear how much additional work would be needed to identify the interaction from the deformation. The cases hint of fundamental design issues, which inhibit the possibilities provided by textile design.…”

Optimizing Pressure Matrices

“…Both the somewhat delicate mechanical layering required for designs inspired by traditional resistive touchpads [10] as well as the relatively fine traces of high resolution devices such as Rosenberg's UnMousePad [27] are currently difficult to implement in fabric. As with conventional sensors, the workarounds include sensor arrays [17,21] that require a relatively large amount of physical connections. Various unconventional solutions, such as the XY textile by Donneaud [14] and a solution that shares many similarities with a 4-wire touchpad by Freed et al [28] have been suggested, but are rarely seen as the relative simplicity of the pressure sensor matrix eventually made it the default design.…”

“…Comparing the input fidelity of matrix pressure sensors is difficult, as details are often not reported, or design parameters and goals differ greatly. For example, RESi demonstrates a potentially high electrode density [21] and the unMousePad [26] even increases the resolution possible due to high density with physical interpolation. Our design goal is to maximize the sensing resolution independently of electrode density, as this simplifies the physical interface.…”

“…Other approaches, such as sensors using zebra-fabric [22] or pressure sensitive threads [21], have zones that are not sensitive to pressure between electrodes. It is not clear how the tested algorithms perform under such conditions.…”