期刊
MICROMACHINES
卷 8, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/mi8040115
关键词
piezoelectric energy harvester; helical; energy harvesting garment; human body motions; wearable
类别
资金
- MSIP (Ministry of Science, ICT and Future Planning), Korea, under the ITRC (Information Technology Research Center) [IITP-2016-H8501-16-1010]
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2016R1A2B4014629]
- IDEC (IC Design Education Center)
- Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [2012-0-00641-002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [22A20130012145, 2016R1A2B4014629] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this paper, we propose a helical piezoelectric energy harvester, examine its application to clothes in the form of an energy harvesting garment, and analyze its design and characteristics. The helical harvester is composed of an elastic core and a polymer piezoelectric strap twining the core. The fabricated harvester is highly elastic and can be stretched up to 158% of its initial length. Following the experiments using three different designs, the maximum output power is measured as 1.42 mW at a 3 M W load resistance and 1 Hz motional frequency. The proposed helical harvesters are applied at four positions of stretchable tight-fitting sportswear, namely shoulder, arm joint, knee, and hip. The maximum output voltage is measured as more than 20 V from the harvester at the knee position during intended body motions. In addition, electric power is also generated from this energy harvesting garment during daily human motions, which is about 3.9 V at the elbow, 3.1 V at the knee, and 4.4 V at the knee during push-up, walking, and squatting motions, respectively.
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