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

fYear

2014

fDate

2-5 Nov. 2014

Firstpage

174

Lastpage

177

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;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2014 IEEE

Conference_Location

Valencia

Type

conf

DOI

10.1109/ICSENS.2014.6984961

Filename

6984961