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Microfabrication and integration of a sol-gel PZT folded spring energy harvester.

Lueke J, Badr A, Lou E, Moussa WA - Sensors (Basel) (2015)

Bottom Line: A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit.The efficiency and charging current must be balanced to achieve a high output and a reasonable output current.The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, University of Alberta, University of Alberta, Edmonton, AB T6G 2G8, Canada. lueke@ualberta.ca.

ABSTRACT
This paper presents the methodology and challenges experienced in the microfabrication, packaging, and integration of a fixed-fixed folded spring piezoelectric energy harvester. A variety of challenges were overcome in the fabrication of the energy harvesters, such as the diagnosis and rectification of sol-gel PZT film quality and adhesion issues. A packaging and integration methodology was developed to allow for the characterizing the harvesters under a base vibration. The conditioning circuitry developed allowed for a complete energy harvesting system, consisting a harvester, a voltage doubler, a voltage regulator and a NiMH battery. A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit. It was found that the maximum efficiency does not correlate to the maximum charging current supplied to the battery. The efficiency and charging current must be balanced to achieve a high output and a reasonable output current. The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

No MeSH data available.


Related in: MedlinePlus

Solid PCBs developed for harvester packaging. (Left) separated and prepared individual PCBs; (Right) a mechanically packaged harvester on an individual PCB [9].
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sensors-15-12218-f011: Solid PCBs developed for harvester packaging. (Left) separated and prepared individual PCBs; (Right) a mechanically packaged harvester on an individual PCB [9].

Mentions: It was chosen to package the harvester onto printed circuit boards to enable in-situ characterization. Cyanoacrylate glue is used to mechanically adhere the piezoelectric energy harvester onto the printed circuit board (PCB). The cyanoacrylate glue is biocompatible, and strongly adheres the silicon base of the energy harvester to the PCB. As shown in Figure 11, in order to allow free vibration, a hole is punched in the PCB where the proof mass of the harvester is expected to be located. This ensures that the energy harvester will not contact the circuit board during operation, preventing harvesting losses and potential damage.


Microfabrication and integration of a sol-gel PZT folded spring energy harvester.

Lueke J, Badr A, Lou E, Moussa WA - Sensors (Basel) (2015)

Solid PCBs developed for harvester packaging. (Left) separated and prepared individual PCBs; (Right) a mechanically packaged harvester on an individual PCB [9].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507646&req=5

sensors-15-12218-f011: Solid PCBs developed for harvester packaging. (Left) separated and prepared individual PCBs; (Right) a mechanically packaged harvester on an individual PCB [9].
Mentions: It was chosen to package the harvester onto printed circuit boards to enable in-situ characterization. Cyanoacrylate glue is used to mechanically adhere the piezoelectric energy harvester onto the printed circuit board (PCB). The cyanoacrylate glue is biocompatible, and strongly adheres the silicon base of the energy harvester to the PCB. As shown in Figure 11, in order to allow free vibration, a hole is punched in the PCB where the proof mass of the harvester is expected to be located. This ensures that the energy harvester will not contact the circuit board during operation, preventing harvesting losses and potential damage.

Bottom Line: A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit.The efficiency and charging current must be balanced to achieve a high output and a reasonable output current.The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, University of Alberta, University of Alberta, Edmonton, AB T6G 2G8, Canada. lueke@ualberta.ca.

ABSTRACT
This paper presents the methodology and challenges experienced in the microfabrication, packaging, and integration of a fixed-fixed folded spring piezoelectric energy harvester. A variety of challenges were overcome in the fabrication of the energy harvesters, such as the diagnosis and rectification of sol-gel PZT film quality and adhesion issues. A packaging and integration methodology was developed to allow for the characterizing the harvesters under a base vibration. The conditioning circuitry developed allowed for a complete energy harvesting system, consisting a harvester, a voltage doubler, a voltage regulator and a NiMH battery. A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit. It was found that the maximum efficiency does not correlate to the maximum charging current supplied to the battery. The efficiency and charging current must be balanced to achieve a high output and a reasonable output current. The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

No MeSH data available.


Related in: MedlinePlus