Touch Sensor Basic Research and Overview.
In this page I'll showcase the research I made for our Week 3 update, in which I tried to look into different sensors that could be use for touch tracking. I'm almost certain that we wouldn't use or need this sensors moving forward. but I'll keep them here next to my review of them.
This first study is a review on Textile-based mechanical sensors. Through the progress of the article, the authors and editors make note of 4 different type of textile based sensors that have been applied into textiles in the past as well as how they perform in health monitoring, motion recognition and human-machine interaction. The Textile sensors analyzed are:
Resistive Sensors:
The most common and most likely the ones to use for our project, these sensors convert mechanical stimuli to a resistance change, the sensing response of these sensor depends on the interaction of changes in mechanical stimuli, geometric variation of assembled devices and changes in the conduction network.
Capacitive Sensors:
They are based on the capacitance changes of the sensing devices induced by external mechanical stimuli. These sensors feature properties of high response repeatability, small signal drift, long term cycle stability and low energy consumption, but they are very susceptible to external field interference, dont have great sensitivity and have a limited sensing range.
Piezoelectric Sensors:
They are produced from flexible materials which convert mechanical stimuli into voltage signals. They generate an internal voltage when subjected to external pressure and have fast response and high sensitivity
Triboelectric Sensors:
Similar to Piezoelectric sensors, Triboelectric sensors convert motion into electrical signals however, the frictional initiation effect that occurs when a material is subjected to normal contact, sliding or twisting allow these sensors to analyze and obtain more dynamic mechanical motions to interpret.The second page leads to a highly developed research space made by The Media Interaction Lab, a HCI research lab hosted at the Department of Interactive Media at the University of Applied Sciences Upper Austria in Hagenberg. For the last few years the lab has developed multiple interactable textile interfaces as well as other avenues for research. Within them they have research on their FSR sensors (Force-Sensing Resistor) or the Resistive Sensors mentiones above. Their research explores the values of designing and implementing the sensors into multiple styles, patterns and sizes.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8538676/
This is a more in depth explanation on how FSR sensors work from an electronic overview.
https://www.tekscan.com/blog/flexiforce/how-does-force-sensing-resistor-fsr-work
These are examples of textile FSR products already in the market and their availability for our purposes.
https://www.liquid-x.com/textile-based-force-sensors/
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