Design and realization of an array pulse detecting tactile sensor

This paper presents a new design and realization of an array tactile sensor for artery pulse measurement. In this array tactile sensor, five pieces of PVDF films are distributed in a circle as sensing elements. Among them one PVDF is located in centre and others are located surrounding the centre. This circular array structure ensure the sensor can not only measure signals of the strong pulse point in the centre, but also show the transfer effect of pulse signals from the centre point to the surrounding points in all directions, which is convenient for artery pulse wave analysis. The five-path signal conditioning circuits and the USB interface circuit are designed. This sensor can measure human pulse from multiple points and display the waveforms of the center measurement point, together with its surrounding circumstances by interactive software. It is very suitable for the next generation of pulse waveform analysis and lays the foundation for medical diagnosis.