Data acquisition system for Piezoelectric Cymbal Transducer energy harvesting

Abstract

This paper presents a portable and low cost data acquisition (DAQ) system for Piezoelectric Cymbal Transducer (PCT) energy harvesting system. Conventional DAQ system is operates based on bulky and expensive personal computer (PC) which is inflexible to be used in PCT energy harvesting system. The proposed system consists of self-assembly PCT, electrical energy harvesting circuit and ARMmbed microcontroller. Direct mechanical compression force via hand press is induced onto the PCT in DAQ sampling works. The efficiency of the proposed DAQ system is verified through Digilent electronics explorer board (EE board). The measured sampling data is available in two modes, which are on-site monitoring using graphic liquid crystal display (GLCD) and online monitoring via WebSocket server. The test results have demonstrated high accuracy of the proposed DAQ system with maximum error of 0.4% and 1.05% in voltage and energy measurements, respectively. The proposed microcontroller based DAQ system fulfils industrial and consumer demand in term of cost effective, flexible and high efficiency design.