In university I learned in a project about EmFits pressure sensitive foil Sensors. These are used in many studies and projects for any kind of application, ranging from occupancy-Sensors for seats in cars to monitoring devices in health care applications. Those Sensors are extremely expensive and only available from Emfit, who patented their unique product.
When researching those sensors I found a way of simulating pressure sensitive foils in different ways with readily available materials.
My project aims to develop a sensor that behaves comparable to EmFits ferro-electret sensors but with a pricetag every hobbyist can afford. This Could become a cheap base for the free development of non-invasive monitoring applications.
My project also aims to keep this technology free! I don't want anyone to be able patent this technology! For this reason I submit it here which makes it known technology.
My ultimate goal is a foil-sensor that is sensitive enough to recognize heartbeat and inhalation rate while being placed under standard mattresses. This could easily be done with EmFit sensors but again, with a pricetag no hobbyist can afford.
For reference try IEEE-Explorer with search tags like noninvasive monitoring, emfit, in-bed monitoring and so on.