Clevertex - Grado Zero Espace Srl
Clevertex - Grado Zero Espace Srl
Clevertex - Grado Zero Espace Srl
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the result of the coupled conductive fibre to freely sliding past the stationary wire contact point at B.<br />
The length of the conductive fibre between the points A and B will change due to the rotation of the<br />
joint. However, the electrical contact with the stationary wire is constantly maintained. Thus, it is<br />
possible to measure the resistance continuously across these two points A and B and to linearly relate<br />
it to the length [117].<br />
Pressure sensor fabrics are capable to provide information on pressure field distribution and its<br />
temporal variation when integrated in underwear or in a wheelchair. Thus, they can be used to detect<br />
when the user has been seated in a certain position for to long and can prevent decubitus. A research<br />
group at the University of Bologna in Italy is working on a concept for a pressure-sensitive fabric.<br />
Fig. 52 Concept of pressure sensitive fabric [118]<br />
The system is based on a chip that can be placed in the corner of a pressure-sensitive fabric and can<br />
produce a digitally processed image. In order to map the pressure that is applied over the fabric<br />
surface, the capacitance variation between rows and columns of conductive fibres, wrapped around a<br />
synthetic foam layer (insulator), is detected [118].<br />
The Bolton University has developed and commercialised a thermal monitoring blanket used for<br />
measure the temperature of the sleeper and warn of major changes.<br />
Researchers at the Georgia Tech are developing a garment that is capable of identifying the location<br />
of bullet holes using a mesh network consisting of conductive and fibre-optic yarns.<br />
A shirt with integrated breathing rate sensors, a shock/fall sensor, temperature sensor and electrodes<br />
for electrocardiogram has been developed within the French project VTAMN (Vetement de Tele-<br />
Assistance Medicale Nomade). The breath rate sensing is performed by sinusoidal-like conductors<br />
integrated into a textile band, whereas a shock/fall identification is enabled by an electronic monitoring<br />
of the three-component acceleration of the body [119].<br />
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