The traditional piezoelectric energy harvester has been used to power to the low-power wireless sensor network node. But its ceramic layer is fragile under the condition of large amplitude, high intensity and long time excitation. In order to solve this problem, the piezoelectric fiber composite MFC acts as a piezoelectric energy harvester. It is more flexible and has a longer service life. The relationship between the output power, energy conversion efficiency of MFC and the load is studied in this paper. The vibration power generation model of the cantilever beam MFC energy absorbing device is established, and the weak energy generated by the MFC energy harvester is collected by the energy collection management chip LTC3588-1. Powering circuit to low-power wireless sensor network node is designed. The experimental results show that there is a certain error between the theoretical and experimental values of the model, but it can reflect the relationship between MFC output power, energy conversion efficiency and load. The cantilever beam MFC energy absorbing device can meet the low power wireless sensing. The power supply of the network node is required.
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