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.

Experimental Performance Evaluation of Vibration Monitoring Sensor Prototype Driven by Piezocomposite Vibration Energy Harvester Under Low Intensity Excitation Condition

2013 ◽  
Author(s):  
Kazuhiko Adachi ◽  
Tatsuya Sakamoto
Keyword(s):  
Energy Harvester ◽  
Rotating Machinery ◽  
Vibration Monitoring ◽  
Vibration Energy ◽  
Excitation Condition ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Vibration Energy Harvester ◽  
Low Intensity ◽  
Monitoring Applications

In this study, we have developed a sensor prototype for vibration acceleration monitoring driven by the authors’ proposed vibration energy harvester. It uses a commercial LTC3588 energy harvesting chip with capacitors and the piezo-bimorph cantilever-type energy harvester consists of the surface bonded two Macro-Fiber Composites. The power consumption of the acceleration sensor was typically 1mW, and the driving current was typically 400 microamperes. For vibration condition monitoring applications of industrial rotating machinery, we assumed that the typical casing or pedestal vibration amplitude of the rotating machinery was 0.71 mm/sec rms according to ISO standard. This low intensity excitation condition was the input for experimental evaluation of the developed sensor prototype. The sensor prototype was able to measure the vibration acceleration of approximately 17 seconds under the vibration input of 0.013G (RMS) at approximately 56Hz every two minutes. Approximately 12% of the input of vibration energy was used for driving the acceleration sensor. Therefore, estimated overall energy transfer efficiency was about 12%. The experimental results indicate the feasibility of the sensor prototype driven by piezocomposite vibration energy harvester.

Theoretical and Experimental Evaluation of System Energy Balance and Power Generation Efficiency for Piezocomposite Vibration Energy Harvester Under Low Intensity Excitation Condition

2012 ◽  
Author(s):  
Kazuhiko Adachi ◽  
Tatsuya Sakamoto
Keyword(s):  
Energy Transfer ◽  
Energy Balance ◽  
Energy Harvester ◽  
Rotating Machinery ◽  
Energy Transfer Efficiency ◽  
Vibration Energy ◽  
Natural Period ◽  
Vibration Energy Harvester ◽  
Low Intensity ◽  
Ac Power

In the authors’ previous study, the vibration energy harvester of the piezoelectric bimorph cantilever type was proposed for vibration condition monitoring applications of industrial rotating machinery. According to an ISO standard, vibration level of newly commissioned class I rotating machinery is under 0.71mm/sec rms in all frequency range. Authors assumed that the typical casing or pedestal vibration amplitude of the rotating machinery was 0.71 mm/sec rms and this low intensity excitation condition was the input for experimental evaluation of the voltage generation performance of the piezocomposit vibration energy harvester. The vibration energy harvester consists of the surface bonded two Macro-Fiber Composites (MFCs). In this study, energy transfer efficiency was derived from the system energy balance during the natural period of the proposed vibration energy harvester. Energy balance equations were successfully obtained from the governing equations of the piezoelectrically coupled electromechanical system. The maximum AC power through 114.3 Kilo-Ohm resistor which includes instrument internal resistances experimentally obtained 242.07 microwatt when subjected to vibration source input magnitude of 0.71 mm/s rms at the resonant frequency of the harvester (29.42 Hz). The impedance matching between MFCs and the electrical resistive load was effective for maximizing AC power transfer of the vibration energy harvester. Estimated energy transfer from mechanical system to electrical system shows the agreement with the experimentally evaluated generating power during the natural period of the vibration energy harvester with about 3% difference. Estimated energy transfer efficiency was about 30% for different excitation magnitudes: 0.71, 0.568 and 0.355 mm/sec rms.

scholarly journals Research and Application of Vibration Energy Harvester Using Macro-Fiber Composite

2019 ◽  
Vol 155 ◽  
pp. 752-757
Author(s):  
Lixiang Wang ◽  
Wei Lin ◽  
Qiang Wen ◽  
Lixing Xie ◽  
Yan Xie
Keyword(s):  
Energy Harvester ◽  
Fiber Composite ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Macro Fiber Composite
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