Abstract
Study on design of micro power energy harvesting using high-power engine noise was aimed to compare the output voltage generated between random noise and stable noise and also determined the piezoelectric circuit variation which produced by ITK’s generator set noise. The noise energy harvester consisted of a quarter wavelength resonator box, three fins, and 3 ceramics piezoelectric. Function generator used to produce a stable wave and the ITK’s engine used to generate random wave. The first experimental result showed that piezoelectric average output voltage from noise engine was higher than noise from function generator when the circuit variation was 1 piezoelectric, parallel circuit, and 3 parallel-series piezoelectric and the opposite, series circuits generated average output voltage was the lowest. The pattern of piezolectric average output voltage which was generated from noise engine source fluctuates, didn’t as stable as noise function generator. This research also got the result that three series piezoelectric generated average output voltage higher than the others with the value of 201,07 mV when SPL and f respectively was 103,5 dB and 223,62 Hz. A higher output would be generated by increase the number of piezoelectric and arranged them into series circuit.
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