当前位置: X-MOL 学术Energy Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Battery-Less Power Management Circuit Powered by a Wearable Piezoelectric Energy Harvester
Energy Technology ( IF 3.6 ) Pub Date : 2021-08-10 , DOI: 10.1002/ente.202100520
Omar Mendez-Lira 1 , Enrique Mario Spinelli 2 , Rafael Gonzalez-Landaeta 1
Affiliation  

A system that aims to manage the energy harvested from the finger movement using a glove-type garment is proposed. For this, five polyvinylidene difluoride (PVDF) film-type sensors are mounted on different interphalangeal joints of the fingers. A 68 μF/25 V ceramic capacitor is used as a storage device. A battery-less power management circuit (PMC) is proposed to isolate the capacitor from the load to reduce the current consumption while charging. When the voltage across the capacitor reaches a threshold voltage, the user decides when to transfer the energy to the electronic load. To test the proposed system, the harvested and conditioned energy is used to power both the PMC and a battery-less cardiac pulse detection circuit, achieving an autonomy of 20 s. This time depends on the voltage stored in the capacitor and the current consumption of the load. Using the proposed wearable system, it is possible to store up to 700 μJ in the capacitor when a subject manipulates a computer or a cellular phone for 10 min. The proposed system is not limited to the activities presented herein because it can harvest the biomechanical energy from any activity that involves finger movements.

中文翻译:

由可穿戴压电能量收集器供电的无电池电源管理电路

提出了一种旨在使用手套式服装管理从手指运动中收集的能量的系统。为此,五个聚偏二氟乙烯 (PVDF) 薄膜型传感器安装在手指的不同指间关节上。68 μF/25 V 陶瓷电容器用作存储设备。建议使用无电池电源管理电路 (PMC) 将电容器与负载隔离,以减少充电时的电流消耗。当电容器两端的电压达到阈值电压时,用户决定何时将能量传输到电子负载。为了测试所提出的系统,收集和调节的能量用于为 PMC 和无电池心脏脉冲检测电路供电,实现 20 秒的自主性。该时间取决于电容器中存储的电压和负载的电流消耗。使用所提出的可穿戴系统,当受试者操作计算机或手机 10 分钟时,可以在电容器中存储高达 700 μJ 的能量。所提出的系统不限于此处介绍的活动,因为它可以从涉及手指运动的任何活动中获取生物力学能量。
更新日期:2021-10-08
down
wechat
bug