Multi-mode composite up-conversion vibration-type environment energy collector

Abstract

The invention belongs to the technical field of micro energy and vibration power generation, and discloses a multi-mode composite up-conversion vibration-type environment energy collector. The energy collector comprises a housing, an electromagnetic energy harvesting unit, a piezoelectric energy harvesting unit and an electrostatic energy harvesting unit, wherein a low-frequency vibration beam and a high-frequency beam are connected to the housing, and the low-frequency vibration beam is located above the high-frequency beam; the low-frequency vibration beam is connected with the electromagnetic energy harvesting unit; the piezoelectric energy harvesting unit and the electrostatic energy harvesting unit share the high-frequency beam; the electrostatic energy harvesting unit is located on the bottommost layer of the housing, and the piezoelectric energy harvesting unit is located between the electromagnetic energy harvesting unit and the electrostatic energy harvesting unit. The energy harvesting structures of three different energy harvesting units of static electricity, piezoelectricity and electromagnetism are scientifically and reasonably arranged, so the energy harvesting bandwidth can be effectively widened, the energy output level of the energy harvesting structures is improved, and the environment adaptability of the energy harvester is enhanced.

Description

technical field [0001] The invention belongs to the technical field of micro-energy and vibration power generation, and in particular relates to a multi-mode compound frequency up-conversion vibration environmental energy collector. Background technique [0002] With the rapid development of MEMS and CMOS sensors and the rapid improvement of data processing capabilities, people have entered the era of the Internet of Everything. Wireless sensor networks will be widely used in national defense and military, smart cities, smart manufacturing, automatic driving, environmental protection and other fields. A large number of low-power sensors are used in wireless sensor networks. They have low energy requirements, and tens or even a few microwatts can make them work normally. For wireless sensor networks in unattended or closed environments, the long-term independent power supply of sensors is a problem to be faced in the future. At present, the power supply of sensors still rel...

AI Technical Summary

Problems solved by technology

The current vibration energy harvesting methods include piezoelectric energy harvesting, electromagnetic energy harvesting and electrostatic energy harvesting. In the prior art, a separate energy harvesting method is often used, which easily leads to the problem of insufficient output voltage and current at the same time.

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