A Smart Harvester for Capturing Energy from Human Ankle Dorsiflexion with Reduced User Effort
Publication in refereed journal

替代計量分析
.

其它資訊
摘要Scavenging energy from human motion is a potential way to meet the increasing requirement of electrical power supply for portable electronics. However, since the conventional energy harvesters may collect both positive and negative work, the users have to pay extra efforts. This work aims at developing a smart energy harvester to accurately identify and capture the negative work of human ankle motion. During normal walking, only the dorsiflexion at stance phase performs negative work. Thus, one-way clutch is employed to filter ankle plantarflexion and mechanical contact switch array is used to disconnect electrical load, avoiding capturing positive work when ankle dorsiflexion is at swing phase. With the one-way clutch and mechanical contact switch array, the energy harvester can effectively target negative work as energy scavenged without consuming electrical energy. A wearable and light prototype is built to test its power output and users' metabolic expenditure during walking. The energy harvesting system is also modeled and analyzed. The experimental results show that the energy harvester produces an average power of 0.35W at 4.9 km h(-1) while reducing metabolic expenditure by 0.84 W, so as to achieve lower cost of harvesting compared with the previous work.
著者Cai MJ, Liao WH, Cao JY
期刊名稱Smart Materials and Structures
出版年份2018
月份12
卷號28
期次1
出版社IOP PUBLISHING LTD
文章號碼015026
國際標準期刊號0964-1726
電子國際標準期刊號1361-665X
語言英式英語
關鍵詞energy harvesting, human motion, ankle dorsiflexion, negative work
Web of Science 學科類別Instruments & Instrumentation;Materials Science, Multidisciplinary;Instruments & Instrumentation;Materials Science

上次更新時間 2021-13-10 於 23:44