Abstract
This paper presents some preliminary studies on the frequency-up conversion method for low frequency application energy vibration based harvesting device, mainly from human body motion, by employing the translation to rotary mechanism. Vibration signals from different parts of the human body were first measured when the human subject was walking at 5 km/h. The signals obtained from the measurement were then reconstructed using Fourier Transform and it was found that frequency content of human body motion was in the range of 1 Hz 25 Hz. A preliminary experiment was conducted to check on the ability of the mechanism to amplify the low excitation frequency. Although the experiment was not optimized, it is found that the device was able to amplify input frequency up to 3.6 times.
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