Fig. 6: Application of S-M/A sensor array for pulse signal measurements.
a A 36-channel S-M/A1 strain sensor array was placed at the wrist above the radial artery to detect the pulse signals at the position of Cun. Right image: Schematic of the strain sensor array and the position of the 36 channels. Sensing unit positions from 1 to 6 along the pulse length and sensing unit positions from (a) to (f) along the pulse width. b Pulse waves are measured continuously by the 3c channel from the sensor array. c Amplification of the single pulse signal in (b). d Column diagrams for pulse strength distribution measured by the 36-channel sensor array. e A series of 3D surface diagrams at every 0.1 s in one complete pulse cycle measured by the 36-channel sensor array. The characteristic peaks of P, T, and D appeared at 0.3 s, 0.6 s, and 0.8 s, respectively. The 3D surface was constructed from 36-channel pulse signals by polynomial fitting.
