Design and analysis of self-sustaining piezoelectric power supply for floating bridge monitoring wireless sensor

Using wireless sensor network to carry out status monitoring for floating bridge structure will improve the reliability and effectiveness of monitoring system greatly. To solve power supply problem of the network nodes, this paper designs a kind of self-sustaining piezoelectric power supply. It converts the mechanical energy which produced in the floating bridge´s work environment into vibration excitation source, so as to extend the load´s continuous effect and correspondingly extend the power supply time; Applly ANSYS to carry out dynamic power generation characteristics simulation analysis of self-sustaining piezoelectric structure, make qualitative analysis on the effect principle of the relevant parameters on the power generation characteristics. Then built Maxite hammer machine test system to simulate the impact test. The research results show that the new power supply is able to collect the impact energy efficiently, and improve the electromechanical conversion efficiency greatly.