Distributed pressure measurement using electrical impedance tomography: initial results

Reports initial results from a system which measures distributed planar pressure using electrical impedance tomography. A prototype pressure sensor has been developed; various objects were placed onto the surface of the sensor and measures of sensor performance calculated for each object. The objects varied in size and in the pressure they exerted on the sensor. The measures used to characterise the performance of the sensor for any given input are the fractional change in voltage and the visibility. The behaviour of the system to variations in the applied load is well behaved. (5 pages)