Abstract
With the popularization of integrated circuits, MEMS, and portable electronic devices, chemical batteries have many disadvantages as the main energy supply method, such as large size, high quality, and limited energy supply life, requiring regular replacement, resulting in waste of materials, environmental pollution, and other issues. From the above reasons, energy harvesting technology plays an important role in improving the efficiency and life of electronic equipment. In order to explore the influence of the bimorph piezoelectric vibrator’s structural parameters on the power generation capacity, this paper establishes a cantilever beam rectangular bimorph piezoelectric vibrator power generation model, derives the mathematical expression of the bimorph piezoelectric vibrator power generation, and determines the parameter factors that affect the power generation effect. Using MATLAB simulation analysis to obtain the influence relationship curve of system output voltage and structural parameters, the experiment tests the influence law of output voltage and thickness ratio, width-to-length ratio, and Young’s modulus ratio; the test results are consistent with the theoretical analysis, verifying the theory and the correctness of the analysis. The results show that when the thickness ratio is 0.58 and the width-to-length ratio is 1, the power generation effect of the piezoelectric vibrator is the best to reach 14.5V; the power generation capacity of the transducer is inversely proportional to Young’s modulus ratio. This research provides a new idea for the popularization of integrated circuits, MEMS, and portable electronic devices.
Highlights
For wireless networks and embedded systems that are developing rapidly at present, the shortcomings of battery power supply are even more obvious. erefore, how to power these low-energy-consumption electronic products has become an urgent problem to be solved
Compared with other power generation principles, piezoelectric power generation has many advantages such as simple structure, no heat generation, no electromagnetic interference, no pollution, and easy realization of miniaturization and integration [6], and it can meet the energy supply of low energy consumption products. is demand has become a hot topic of current research
Different from the above research, Liu obtained the law of the output power of the transducer structure by analyzing the size parameters of the piezoelectric material [17]; Lei optimized the acquisition efficiency of the transducer by analyzing the relationship between the natural frequency and the size parameter [18]
Summary
For wireless networks and embedded systems that are developing rapidly at present, the shortcomings of battery power supply are even more obvious. erefore, how to power these low-energy-consumption electronic products has become an urgent problem to be solved. Different from the above research, Liu obtained the law of the output power of the transducer structure by analyzing the size parameters of the piezoelectric material [17]; Lei optimized the acquisition efficiency of the transducer by analyzing the relationship between the natural frequency and the size parameter [18]. They still have not analyzed the influence of substrate size and material parameters on the transducer. They still have not analyzed the influence of substrate size and material parameters on the transducer. is article innovatively establishes the theoretical model of the piezoelectric vibrator, analyzes the influence of the thickness ratio, width-to-length ratio, and Young’s modulus ratio of the piezoelectric material to the substrate in the piezoelectric model on the power generation capacity, determining the optimal ratio of the structural parameters of the transducer and providing a new theoretical basis and technical reference for the field of wafertype energy conversion power generation
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