Portable acquisition system for measurements of pressures, temperatures and humidity in lower limb prosthesis

An instrument with a DSP for measurements of pressures, temperatures and humidity in lower limb prosthesis is presented. It has got sixteen analog input channels. The signals from the transducers are linked to the input channels and feed the conditioning network which is made up by amplification stages and peak detectors. Input signals are converted into a digital form by a 10 bit analog to digital converter integrated into the DSP and information are pre-processed and then stored in a removable memory with high capacity. The instalment is also equipped with an LCD display to show the progress of the interesting parameters in real time. Now we are testing the instrument at the Prosthetic Center in Vigorso di Budrio (Italy). The aim of these tests is checking the correct operation of the instrument in different working ways and bringing constructive modifications to prosthesis to better locate the sensors