Abstract
The power generation capacity of piezoelectric energy harvesters (PEHs) is not only related to the properties of the piezoelectric material, the vibration magnitude and the subsequent conditioning circuit, but also to the fixation modes and adjustment methods. In this paper, a commercial piezoelectric ceramic plate (PCP) in simply supported beam fixation mode and cantilever beam fixation mode were analyzed through finite element simulations and experiments, and furthermore, two ways of adjusting the natural frequency of PCP are studied and compared. As a result, some guidelines are proposed for the application of PCPs according to the simulation and experimental results which showed that: (1) the simply supported beam fixation mode is suitable for environments in which the exciting frequency exceeds 50 Hz, while the cantilever beam fixation mode fits the circumstance where the exciting frequency is below 50 Hz; (2) the maximum generation power a PCP produces in simply supported beam fixation mode is larger than that in cantilever beam fixation mode; (3) adjusting the weight of the mass block affixed on the PCP can change the natural frequency of PCP more efficiently than length-width ratio does.
Highlights
The fast development of microelectronics and wireless communication technology has promoted the wide use of wireless sensor networks (WSNs), batteries are needed to power the wireless sensor nodes, and must be recharged or replaced when their capacity is low, which is a prominent drawback in the development of WSNs
In the simulation of supported beam fixation majority The of the settings are consistent with the settings in a simplysimply supported beam fixation cantileverofbeam is a frequently used method compared beam as fixation onlymode, mode, the majority the settings are consistent with the settingswith in a simplysupported supported beam except that the mounting position of the mass block is adjusted to the unfixed end of piezoelectric ceramic plate (PCP), and the one end of itthat needs be fixed;position,ofitthe places demands on the material properties of the mode, except the to mounting masshigh block is adjusted to the unfixed end of PCP, and harmonic force of 0.5 N isaimposed on a node the edge of center of supported the unfixed endfixation of the PCP
According to the simulation and experimental statistics described above, the natural frequency of the PCP in supported beam fixation mode is higher; the natural frequencies of PCPs affixed with mass block range were 200–400 Hz in simulations and 50–120 Hz in experiments
Summary
The fast development of microelectronics and wireless communication technology has promoted the wide use of wireless sensor networks (WSNs), batteries are needed to power the wireless sensor nodes, and must be recharged or replaced when their capacity is low, which is a prominent drawback in the development of WSNs. Studies on ambient energy scavenging technology are developing very fast [1]. These energy capture technologies include solar energy capture technology, wind energy capture technology, electromagnetic energy capture technology and vibration energy capture technology, etc. Adding a mass block on a PCP is often adopted to change its natural frequency, but other methods such as changing the length-width ratio of PCP are scarcely reported Both the supported beam fixation and the influence of length-width ratio have not been comprehensively studied, so in this paper finite element simulations and experiments were performed to figure out how the fixation mode and the adjustment method influence the power generation capacity of a PCP
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
