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FDM-T-Sports
3.4. Measuring principle FDM-T systems
The system contains a measuring matrix consisting of capacitive pressure sensors that are arranged
in columns and lines running closely next to each other. For determining the pressure distribution
over the measuring matrix, the capacity proportional to the pressure exerted is determined for each
individual sensor. To do this, the drive logic generates several sinus burst signals equivalent to the
number of columns via the column decoder and transmits them to the respective measuring column.
The analogue signal coupled into the shift register over the lines is proportional to the pressure-dependent
capacity and is passed on for further processing to the control and signal-processing electronics and
transmitted to the PC from there and shown on the display.
Schematic circuit diagram of the measuring system
