Title :
Experimental study on low-power wireless monitor of rotary motion using improved energy harvesting system with piezoelectric element
Author :
Kitayoshi, Hitoshi ; Sawaya, Kunio ; Kuwano, Hiroki
Author_Institution :
Grad. Sch. of Eng., Tohoku Univ., Sendai, Japan
Abstract :
A battery-free wireless monitoring system of vibration waveform for rotary motion is proposed. The sensor node is composed of a replicated-mass type piezoelectric generator, a 10 bit resolution ADC, a controller for quadrature phase shift keying (QPSK) data transmission and a cavity-backed slot antennas for the modulated back scattering communications. Consumption power of the sensor node is 60 microwatt by using the piezoelectric generator, where 30 m wireless reading range is achieved at 2.45 GHz band with a continuous 50 sps vibration waveform in the rotation range of 100 rpm to 600 rpm.
Keywords :
UHF detectors; analogue-digital conversion; backscatter; energy harvesting; monitoring; motion measurement; piezoelectric transducers; quadrature phase shift keying; rotation measurement; slot antennas; vibration measurement; wireless sensor networks; ADC; QPSK; battery-free low-power wireless monitoring system; cavity-backed slot antenna; data transmission; distance 30 m; frequency 2.45 GHz; improved energy harvesting system; modulated back scattering communication; power 60 muW; power consumption; quadrature phase shift keying; replicated-mass type piezoelectric generator; rotary motion; vibration waveform system; word length 10 bit; Acceleration; Generators; Monitoring; Springs; Vibrations; Wireless communication; Wireless sensor networks; battery-free wireless sensor; modulated back scattering communication; piezoelectric generator for rotary motion;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6984961
