2020 Volume Annual58 Issue Abstract Pages 150
Artificial nails can be worn for several weeks continuously. By embodying a measuring circuit, wireless transmission circuit and batteries in an artificial nail, this wearable sensor can monitor the vital signal for several weeks continuously. However usable battery is limited to a small battery due to small area of nails. Thus, power consumption must be reduced to realize the wearable sensor attaching to nail surface. In this research, pulse wave measurement using piezo film attaching to nail surface is presented. In the previous research, cyclic micro-strain of nails which have similar waveform with pulse wave was shown. In the experiment, piezo film on a nail surface converts micro-strain to electrical signal by piezoelectric effect. Piezo film is attached to left thumb nail by glue. As the results, cyclic signals were obtained and waveform was similar to typical pulse wave. Amplitude of output signal was around 70 mV.
