A03 Power Generation Evaluation of Piezoelectric Vibration Energy Harvester for Vibration Condition Monitoring Applications of Rotating Machinery

2009 ◽  
Vol 2009.11 (0) ◽  
pp. 13-18
Author(s):  
Kazuhiko ADACHI ◽  
Tohru TANAKA
Keyword(s):  
Power Generation ◽  
Condition Monitoring ◽  
Energy Harvester ◽  
Rotating Machinery ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Vibration Condition ◽  
Monitoring Applications ◽  
Piezoelectric Vibration Energy Harvester ◽  
Piezoelectric Vibration

A Preliminary Study of Piezoelectric Vibration Energy Harvester for Vibration Condition Monitoring Applications of Rotating Machinery

2008 ◽  
Author(s):  
Kazuhiko Adachi ◽  
Tohru Tanaka
Keyword(s):  
Condition Monitoring ◽  
Energy Harvester ◽  
Fiber Composite ◽  
Rotating Machinery ◽  
Industrial Plant ◽  
Vibration Energy ◽  
Production Plant ◽  
Vibration Energy Harvester ◽  
Vibration Condition ◽  
Monitoring Applications

Rotating machinery is widely used in the industrial plant, for example, power plant, chemical plant, mass-production plant and so on. In order to ensure safety operation of the rotating machinery, vibration condition monitoring of the machinery can play a crucial role. In this study, the cantilever type of vibration energy harvester is designed for vibration condition monitoring applications of rotating machinery. The mechanical resonant frequency of piezoelectric bimorph cantilever will be tuned to the rotating speed of the machinery. Recently, new d31 type Macro-Fiber Composite (MFC) can be commercially available. Due to the d31 configuration, electrical impedance of new MFC is much smaller than that of previous d33 type MFC. This study experimentally compares the ability two types of MFC, d31 and d33 configurations, to generate electrical energy when subjected to mechanical vibration.

An Experimental Power Generation Evaluation of Cantilever Type of Piezoelectric Vibration Energy Harvester

2009 ◽  
Author(s):  
Kazuhiko Adachi ◽  
Tohru Tanaka
Keyword(s):  
Power Generation ◽  
Resonant Frequency ◽  
Condition Monitoring ◽  
Energy Harvester ◽  
Rotating Machinery ◽  
Industrial Plant ◽  
Vibration Energy ◽  
Production Plant ◽  
Vibration Energy Harvester ◽  
Vibration Condition

Rotating machinery is widely used in the industrial plant, for example, power plant, chemical plant, mass-production plant and so on. In order to ensure safety operation of the rotating machinery, vibration condition monitoring of the machinery can play a crucial role. Authors have proposed a cantilever type of vibration energy harvester for vibration condition monitoring applications of rotating machinery. Proposed energy harvester consisted of Macro-Fiber Composite (MFC) which is flexible and durable piezocomposite type actuator. The mechanical resonant frequency of the piezoelectric bimorph cantilever is tuned to the rotating speed of a typical 4-pole induction motor driven rotating machine. In this study, the power generation performance of proposed energy harvester is evaluated through numerical simulations as well as experiment when subjected to vibration source input magnitude of 0.71(mm/s rms) at the resonant frequency of the harvester by using the electrodynamic shaker.

scholarly journals Experimental study of multi-magnet excitation for enhancing micro-power generation in piezoelectric vibration energy harvester

Mechanika ◽  
2019 ◽  
Vol 25 (3) ◽  
pp. 219-224 ◽  
Author(s):  
Arūnas Kleiva ◽  
Rolanas Daukševičius
Keyword(s):  
Power Generation ◽  
Energy Harvester ◽  
Average Power ◽  
Vibration Energy ◽  
Natural Period ◽  
Vibration Energy Harvester ◽  
Micro Power ◽  
Impulse Train ◽  
Piezoelectric Vibration Energy Harvester ◽  
Piezoelectric Vibration

The reported work experimentally investigates a method of more effective contactless mechanical frequency up-conversion that is based on multi-magnet plucking of a piezoelectric vibration energy harvester. Several moving excitation magnets are used to produce a periodic impulse train, which during a single plucking event consecutively deflects and then releases the cantilevered transducer to freely oscillate, thereby enabling enhanced micro-power generation performance. It was established that the proposed method is effective if a couple conditions are met. First, the transducer must be impulsively excited to produce resonant transient responses, which occurs when the ramping time of the magnetic impulse is close to the transducer rise time (defined as a quarter of the natural period). Second, the gap between the moving excitation magnets must be tuned to ensure that the impulse train period is as close to the natural period as possible. Measurements indicate that, in comparison to the conventional single-magnet plucking case, the consecutive excitation with three moving magnets leads to nearly six-fold (seven-fold) increase in average power output and total generated energy during the in-plane (out-of-plane) plucking regime.

scholarly journals Theoretical and Experimental Studies on MEMS Variable Cross-Section Cantilever Beam Based Piezoelectric Vibration Energy Harvester

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 772
Author(s):  
Xianming He ◽  
Dongxiao Li ◽  
Hong Zhou ◽  
Xindan Hui ◽  
Xiaojing Mu
Keyword(s):  
Power Density ◽  
Cantilever Beam ◽  
Cross Section ◽  
Energy Harvester ◽  
Variable Cross Section ◽  
Vibration Energy ◽  
Variable Cross ◽  
Vibration Energy Harvester ◽  
Piezoelectric Vibration Energy Harvester ◽  
Piezoelectric Vibration

The piezoelectric vibration energy harvester (PVEH) based on the variable cross-section cantilever beam (VCSCB) structure has the advantages of uniform axial strain distribution and high output power density, so it has become a research hotspot of the PVEH. However, its electromechanical model needs to be further studied. In this paper, the bidirectional coupled distributed parameter electromechanical model of the MEMS VCSCB based PVEH is constructed, analytically solved, and verified, which laid an important theoretical foundation for structural design and optimization, performance improvement, and output prediction of the PVEH. Based on the constructed model, the output performances of five kinds of VCSCB based PVEHs with different cross-sectional shapes were compared and analyzed. The results show that the PVEH with the concave quadratic beam shape has the best output due to the uniform surface stress distribution. Additionally, the influence of the main structural parameters of the MEMS trapezoidal cantilever beam (TCB) based PVEH on the output performance of the device is theoretically analyzed. Finally, a prototype of the Aluminum Nitride (AlN) TCB based PVEH is designed and developed. The peak open-circuit voltage and normalized power density of the device can reach 5.64 V and 742 μW/cm3/g2, which is in good agreement with the theoretical model value. The prototype has wide application prospects in the power supply of the wireless sensor network node such as the structural health monitoring system and the Internet of Things.

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