Abstract
The impact energy harvesting technology is studied in this paper, a piezoelectric harvesting structure with additional resonant structure including spring mass components is proposed, and the system dynamics model of the structure is studied. The influence of the structural parameters of spring mass block on the system output voltage is studied by using the model. The research results have certain application value for impact energy harvesting.
Highlights
The piezoelectric harvesting for impact energy is a hot research direction in the field of energy collection technology[1,2,3]
Because the impact character of shorttime and instantaneous, which is different from the collection of continuous vibration energy, the energy conversion and storage time for the impact energy harvesting device is limited by the impact pulse width[4]
The process of energy conversion can be maintained by prolonging the action time of excitation force and changing the natural frequency of the whole vibration system, so as to optimize the system parameters to improve the energy collection efficiency
Summary
The piezoelectric harvesting for impact energy is a hot research direction in the field of energy collection technology[1,2,3]. The process of energy conversion can be maintained by prolonging the action time of excitation force and changing the natural frequency of the whole vibration system, so as to optimize the system parameters to improve the energy collection efficiency. The working principle of this structure is similar to that of the vibration absorber It is mainly composed of hard springs and mass blocks. During vibration, it can be regarded as an additional resonator to change the resonance frequency of the energy collector. By changing the design parameters of the spring mass block, the resonator frequency is adjusted so that the resonance frequency of the resonator is close to that of the transducer, so as to achieve the purpose of multi-modal energy collection. Compared with the simple piezoelectric structure, the additional resonant structure brings great flexibility to the design of energy collector
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