scholarly journals Experimental Frequency Tuning Methodology of a Cantilever Piezoelectric Harvester Validated in a Multimodal Transportation

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 79
Author(s):  
Ruben Del-Rio-Ruiz ◽  
Juan Jose Echevarria ◽  
Xabier Eguiluz ◽  
Juan-Manuel Lopez-Garde ◽  
Jon Legarda
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Frequency Tuning ◽  
Piezoelectric Energy Harvesting ◽  
Road Transportation ◽  
Data Logger ◽  
Ultra Low Power ◽  
Piezoelectric Energy ◽  
Phase Tuning ◽  
Iot Devices

Piezoelectric energy harvesting is a promising technology that increases the autonomy of low power IoT devices in scenarios that are subjected to mechanical vibrations. This work shows the potential of this technology to power IoT devices with the energy that is harvested from vibrations occurred during air and road transportation. Adjusting the natural resonance frequency of the piezoelectric generator (PEG) to the mechanical acceleration frequency that has the highest power spectral density is key to increase the harvested energy. Therefore, in this work a commercial PEG is tuned to the best spectrogram frequency of a real vibration signal following a two-phase tuning process. The harvested power generated by the PEG has been validated in real scenarios, providing 2.4 μ Wh during flight (take-off, cruise flight, and landing), 11.3 μ Wh during truck transportation in urban areas, and 4.8 μ Wh during intercity transportation. The PEG has been embedded in an ultra-low power IoT device to validate how much this harvested energy can increase the autonomy in a real scenario that is subjected to similar vibrations. An NFC temperature data logger is developed for perishable products that are transported by air and road transports. The energy harvested by the PEG tuned with the methodology proposed in this work has increased the autonomy of the data logger 16.7% during a real use case of 30 h, which validates the potential of the piezoelectric energy harvesting technology to increase the autonomy of future low power IoT devices used in scenarios with aperiodic vibrations.

A self-powered ultra-low-power intermittent-control SSHI circuit for piezoelectric energy harvesting

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Guoda Wang ◽  
Ping Li ◽  
Yumei Wen ◽  
Zhichun Luo
Keyword(s):  
Energy Harvesting ◽  
Input Power ◽  
Control Circuit ◽  
Piezoelectric Energy Harvesting ◽  
Intermittent Control ◽  
Ultra Low Power ◽  
Content Type ◽  
Cold Starting ◽  
Piezoelectric Energy ◽  
Self Powered

Purpose Existing control circuits for piezoelectric energy harvesting (PEH) suffers from long startup time or high power consumption. This paper aims to design an ultra-low power control circuit that can harvest weak ambient vibrational energy on the order of several microwatts to power heavy loads such as wireless sensors. Design/methodology/approach A self-powered control circuit is proposed, functioning for very brief periods at the maximum power point, resulting in a low duty cycle. The circuit can start to function at low input power thresholds and can promptly achieve optimal operating conditions when cold-starting. The circuit is designed to be able to operate without stable DC power supply and powered by the piezoelectric transducers. Findings When using the series-synchronized switch harvesting on inductor circuit with a large 1 mF energy storage capacitor, the proposed circuit can perform 322% better than the standard energy harvesting circuit in terms of energy harvested. This control circuit can also achieve an ultra-low consumption of 0.3 µW, as well as capable of cold-starting with input power as low as 5.78 µW. Originality/value The intermittent control strategy proposed in this paper can drastically reduce power consumption of the control circuit. Without dedicated cold-start modules and DC auxiliary supply, the circuit can achieve optimal efficiency within one input cycle, if the input signal is larger than voltage threshold. The proposed control strategy is especially favorable for harvesting energy from natural vibrations and can be a promising solution for other PEH circuits as well.

scholarly journals Frequency Tuning of Unimorph Cantilever for Piezoelectric Energy Harvesting

2007 ◽  
Vol 17 (12) ◽  
pp. 660-663 ◽  
Author(s):  
Hyung-Chan Kim ◽  
Hyun-Cheol Song ◽  
Dae-Yong Jeong ◽  
Hyun-Jai Kim ◽  
Seok-Jin Yoon ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Frequency Tuning ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Unimorph Cantilever

Energy harvesting from quasi-static deformations via bilaterally constrained strips

2018 ◽  
Vol 29 (18) ◽  
pp. 3572-3581
Author(s):  
Suihan Liu ◽  
Ali Imani Azad ◽  
Rigoberto Burgueño
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Energy Resource ◽  
Electrical Energy ◽  
Piezoelectric Energy Harvesting ◽  
Power Budget ◽  
Piezoelectric Energy ◽  
Static Conditions

Piezoelectric energy harvesting from ambient vibrations is well studied, but harvesting from quasi-static responses is not yet fully explored. The lack of attention is because quasi-static actions are much slower than the resonance frequency of piezoelectric oscillators to achieve optimal outputs; however, they can be a common mechanical energy resource: from large civil structure deformations to biomechanical motions. The recent advances in bio-micro-electro-mechanical systems and wireless sensor technologies are motivating the study of piezoelectric energy harvesting from quasi-static conditions for low-power budget devices. This article presents a new approach of using quasi-static deformations to generate electrical power through an axially compressed bilaterally constrained strip with an attached piezoelectric layer. A theoretical model was developed to predict the strain distribution of the strip’s buckled configuration for calculating the electrical energy generation. Results from an experimental investigation and finite element simulations are in good agreement with the theoretical study. Test results from a prototyped device showed that a peak output power of 1.33 μW/cm2 was generated, which can adequately provide power supply for low-power budget devices. And a parametric study was also conducted to provide design guidance on selecting the dimensions of a device based on the external embedding structure.

Piezoelectric Energy Harvesting for Powering Micro Electromechanical Systems (MEMS)

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
A. Majeed
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Piezoelectric Materials ◽  
Electrical Energy ◽  
Piezoelectric Energy Harvesting ◽  
Wireless Technology ◽  
Power Devices ◽  
Piezoelectric Energy ◽  
Technical Innovations ◽  
Low Power Electronics

Recent advancements in wireless technology and low power electronics such as micro electrome-chanical systems (MEMS), have created a surge of technical innovations in the eld of energy har-vesting. Piezoelectric materials, which operate on vibrations surrounding the system have becomehighly useful in terms of energy harvesting. Piezoelectricity is the ability to transform mechanicalstrain energy, mostly vibrations, to electrical energy, which can be used to power devices. This paperwill focus on energy harvesting by piezoelectricity and how it can be incorporated into various lowpower devices and explain the ability of piezoelectric materials to function as self-charging devicesthat can continuously supply power to a device and will not require any battery for future processes.

Current Situation of Research on the Application of the Piezoelectric Energy Harvesting Circuit

2012 ◽  
Vol 614-615 ◽  
pp. 1410-1415
Author(s):  
Shi Sha Zhu ◽  
Xue Peng Qian ◽  
You Hang Zhou
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Smart Materials ◽  
Current Situation ◽  
Smart Structure ◽  
Piezoelectric Energy Harvesting ◽  
Circuit Optimization ◽  
Piezoelectric Energy ◽  
Efficient Storage ◽  
Power Application

In recent years, with the development of smart materials as well as smart structure technologies, and the research on piezoelectric energy harvesting technology deepens, the low power application circuit along with highly-efficient storage circuit optimization and design has become one of the essential parts in this field. The author made a systematic conclusion on the piezoelectric energy harvesting circuit, and put forwards a feasible plan for sustainable research in the future.

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