Integrally manufactured nonlinear cascaded multi-degree-of-freedom vibration energy collector

Abstract

The invention provides an integrally manufactured nonlinear cascaded multi-degree-of-freedom vibration energy collector which is characterized in that an inner ring permanent magnet mass block is arranged at an inner ring movable platform, and the inner ring movable platform is fixed at the inner edge of an outer ring vibrator through an inner ring nonlinear spring; an outer ring mass block is arranged at an outer ring movable platform, and the outer ring movable platform is fixed at the inner edge of a supporting block through an outer ring non-linear spring; a through hole is formed in the supporting block, and a planar coil is arranged on the lower surface of the support block. The inner ring permanent magnet mass block moves up and down to change the magnetic flux passing through the planar coil, so that the conversion from vibration energy to electric energy is realized. By independently changing the parameters of an inner ring oscillator and an outer ring oscillator, the distancebetween the two nonlinear modes and the bandwidth characteristic of a single nonlinear mode can be adjusted, the working bandwidth of the vibration energy collector can be remarkably increased, and the device is easy to manufacture integrally.

Description

technical field [0001] The invention relates to the technical field of micro-scale environmental vibration energy harvesters, in particular to an integrated manufacturing non-linear cascaded multi-degree-of-freedom vibration energy harvester. Background technique [0002] The vibration energy harvester converts the vibration energy in the environment into electrical energy through different mechanisms (electromagnetic, electrostatic, piezoelectric and triboelectric) to drive electronic devices to work. Among them, the electromagnetic vibration energy harvester has received more attention because of its low output impedance, high output current, and stable work in harsh environments. It is used in implantable medical health monitoring equipment, wireless sensor network nodes, and unattended sensors. It has broad application prospects in the power supply. [0003] At present, the miniaturized vibration energy harvester has the problems of narrow working bandwidth and low outp...

AI Technical Summary

Problems solved by technology

[0004] First of all, it is difficult to realize the independent adjustment of each level of nonlinearity under cascading conditions based on stopper blocks or magnetic nonlinear mechanisms, so it is difficult to eliminate the "trough" where the power output between modes is approximately zero, which greatly limits energy harvesting The performance of energy harvesting in a complex frequency environment

[0005] Secondly, a complex three-dimensional structure is required to introduce nonlinear effects based on stoppers and magnetic forces. Therefore, related research can only introduce nonlinear effects into one of the first-order modes, and cannot introduce nonlinear responses into multiple modes at the same time. Limits the further broadening of the energy harvester's operating frequency band

[0006] On the other hand, it is used to introduce nonlinear and complex three-dimensional structures, which also limits the feasibility of reducing the size of devices using semiconductor processes

[0007] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

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