Multi-Touch Skin

Multi-Touch Kit

“…Touch is a mature input technology popularized earlier with screen-based devices [4], evolving since then into diverse application areas and scales, such as interactive spaces [7,42], objects [32,28] and on-body interfaces [16,14,27,37,38]. Research has also demonstrated a versatile spectrum of methods to fabricate custom touch sensors.…”

“…Research has also demonstrated a versatile spectrum of methods to fabricate custom touch sensors. These comprise crafting with conductive copper and gold leafs [21], silicone casting [37], inkjet printing [22], screen printing [27,38] and 3D printing [34].…”

“…Multi-Touch Kit is compatible with established rapid prototyping techniques for fabricating sensor matrices that have been presented in the literature. These include conductive inkjet printing on a desktop printer [23], as demonstrated in [27], or cutting copper foil using a commercial vinyl cutter, as used in [33]. Sensor designs can also be hand-drawn with a conductive pen (Circuit Scribe), or stitched on fabric with conductive thread (Adafruit Stainless Thin Conductive Thread).…”

“…Raw data of mutual-capacitance sensors are affected by several internal and external factors of the sensor design. For instance, previous research shows the intensity of raw values varies with distance from the connecting edge of a sensor matrix [27]. Additionally, in custom designs, the custom size, length, shape and materials used for the electrodes may also affect the homogeneity of the raw values.…”

“…However, because of the limited number of electrodes, this image has a low resolution. Similar to previous research in capacitive sensing, we use bi-cubic interpolation to create an up-scaled imaged suitable for blob detection and finger tracking using image processing techniques [27].…”