Energy Harvesting from Human Motion Using Footstep-Induced Airflow
This paper presents an unobtrusive in-shoe energy harvester converting foot-strike energy into electricity to power wearable or portable devices. An air-pumped turbine system is developed to address the issues of the limited vertical deformation of shoes and the low frequency of human motion that im...
| Main Authors: | , , , , |
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| Format: | Article |
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IOP Publishing
2019
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| Online Access: | http://hdl.handle.net/1721.1/119862 https://orcid.org/0000-0001-6525-4384 https://orcid.org/0000-0002-3125-3268 https://orcid.org/0000-0001-6025-8538 |
| _version_ | 1811079581561520128 |
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| author | Fu, H Yeatman, E M Seto, Kelsey C. Kim, Sang-Gook Xu, Ruize |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Fu, H Yeatman, E M Seto, Kelsey C. Kim, Sang-Gook Xu, Ruize |
| author_sort | Fu, H |
| collection | MIT |
| description | This paper presents an unobtrusive in-shoe energy harvester converting foot-strike energy into electricity to power wearable or portable devices. An air-pumped turbine system is developed to address the issues of the limited vertical deformation of shoes and the low frequency of human motion that impede harvesting energy from this source. The air pump is employed to convert the vertical foot-strike motion into airflow. The generated airflow passes through the miniaturized wind turbine whose transduction is realized by an electromagnetic generator. Energy is extracted from the generator with a higher frequency than that of footsteps, boosting the output power of the device. The turbine casing is specifically designed to enable the device to operate continuously with airflow in both directions. A prototype was fabricated and then tested under different situations. A 6 mW peak power output was obtained with a 4.9 Ω load. The achievable power from this design was estimated theoretically for understanding and further improvement. |
| first_indexed | 2024-09-23T11:17:17Z |
| format | Article |
| id | mit-1721.1/119862 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T11:17:17Z |
| publishDate | 2019 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1198622024-06-27T14:44:36Z Energy Harvesting from Human Motion Using Footstep-Induced Airflow Fu, H Yeatman, E M Seto, Kelsey C. Kim, Sang-Gook Xu, Ruize Massachusetts Institute of Technology. Department of Mechanical Engineering Seto, Kelsey C. Kim, Sang-Gook Xu, Ruize This paper presents an unobtrusive in-shoe energy harvester converting foot-strike energy into electricity to power wearable or portable devices. An air-pumped turbine system is developed to address the issues of the limited vertical deformation of shoes and the low frequency of human motion that impede harvesting energy from this source. The air pump is employed to convert the vertical foot-strike motion into airflow. The generated airflow passes through the miniaturized wind turbine whose transduction is realized by an electromagnetic generator. Energy is extracted from the generator with a higher frequency than that of footsteps, boosting the output power of the device. The turbine casing is specifically designed to enable the device to operate continuously with airflow in both directions. A prototype was fabricated and then tested under different situations. A 6 mW peak power output was obtained with a 4.9 Ω load. The achievable power from this design was estimated theoretically for understanding and further improvement. 2019-01-04T19:45:18Z 2019-01-04T19:45:18Z 2015-12 2018-12-11T18:05:46Z Article http://purl.org/eprint/type/JournalArticle 1742-6588 1742-6596 http://hdl.handle.net/1721.1/119862 Fu, H, R Xu, K Seto, E M Yeatman, and S G Kim. “Energy Harvesting from Human Motion Using Footstep-Induced Airflow.” Journal of Physics: Conference Series 660 (December 10, 2015): 012060. © 2019 IOP Publishing https://orcid.org/0000-0001-6525-4384 https://orcid.org/0000-0002-3125-3268 https://orcid.org/0000-0001-6025-8538 http://dx.doi.org/10.1088/1742-6596/660/1/012060 Journal of Physics: Conference Series Creative Commons Attribution 3.0 Unported license http://creativecommons.org/licenses/by/3.0/ application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Fu, H Yeatman, E M Seto, Kelsey C. Kim, Sang-Gook Xu, Ruize Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title | Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title_full | Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title_fullStr | Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title_full_unstemmed | Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title_short | Energy Harvesting from Human Motion Using Footstep-Induced Airflow |
| title_sort | energy harvesting from human motion using footstep induced airflow |
| url | http://hdl.handle.net/1721.1/119862 https://orcid.org/0000-0001-6525-4384 https://orcid.org/0000-0002-3125-3268 https://orcid.org/0000-0001-6025-8538 |
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