Electromagnetic-piezoelectric composite type wave energy collection device

Abstract

The invention provides an electromagnetic-piezoelectric composite type wave energy collection device and belongs to the technical field of designing and manufacturing of energy collection devices. The objective of the invention is to achieve that vibration energy of fluctuated waves are acquired to replace a traditional cell to carry out permanent power supply on micro-devices like ocean monitoring wireless sensors. The wave energy collection device comprises an electromagnetic type energy collection structure and a piezoelectric type energy collection structure. A pair of piezoelectric bimorph cantilever arm structures are arranged on two ends of a base. A pair of rectangular magnets are laid on the piezoelectric bimorphs. Two groups of support racks are arranged on a flat plate part of the base. Two ends of each of cylindrical protection cylinders in the support racks are fixed through flanges and protection nets. The protection cylinders are arranged in the middle parts of the piezoelectric bimorph cantilever arm structures. Coil cylinders are arranged in the protection cylinders. The length of each coil cylinder is consistent with that of the corresponding protection cylinder. Coils are laid on the coil cylinders. Magnetic vibrators are arranged in the coil cylinders. Two pairs of rollers are arranged on upper and lower sides of the magnetic vibrators. The wave energy collection device is mainly used for providing power for ocean wireless sensors.

Description

technical field [0001] The invention belongs to the field of design and manufacture of energy harvesting devices. Background technique [0002] With the development of society, the development of new energy has become an inevitable way of social progress. On the one hand, the energy sources required for industrial and agricultural production are mainly oil, coal, and natural gas. According to the current energy consumption rate, in the near future, oil, coal, natural gas and other energy sources will be exhausted; on the other hand, with the development of science and technology, electronic products are constantly tending to miniaturization and integration, which greatly promote With the rapid development of low-power wireless sensor networks and micro-electromechanical systems, the power supply problem is becoming a great obstacle to their further development. The traditional electrochemical battery power supply method has disadvantages such as short life, frequent replac...

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Problems solved by technology

[0003] According to the search, there are currently existing self-powered devices that collect vibration energy, such as "A Portable Piezoelectric-Electromagnetic Hybrid Power Generation Device Accelerated by Variable Gears" disclosed in Chinese Patent Application No. 201510881581.9. Although the hybrid power generation device described in this patent It can realize the conversion of functional energy into electric energy in the field or in emergency situations, but due to the large impact of the transmission gear used in it, a large dynamic load is generated, and the gear transmission unit generates charges by hitting the piezoelectric ceramic power generation unit to damage the piezoelectric ceramic power generation piece In addition, the invention uses transmission mechanisms such as variable speed gear transmission, which makes the overall structure more complicated, and has higher requirements for manufacturing and installation precision, which increases the difficulty for the final realization

Another example is the vibration energy harvesting method shown in the "Multidirectional Vibration Energy Harvesting and Transformation Device" disclosed in Chinese Patent Application No. 201510577272.2, which connects the electromagnetic energy harvesting device with a three-dimensional support frame, but uses a single electromagnetic effect power generation device The energy collection effect is poor, and the device structure is greatly affected by the environment, and the reliability is poor

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