ZEL: Net-Zero-Energy Lifelogging System using Heterogeneous Energy Harvesters
ZEL: Net-Zero-Energy Lifelogging System using Heterogeneous Energy Harvesters
复制标题
DOI：
10.1109/percom53586.2022.9762376
复制
发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Mitsuru Arita;Yugo Nakamura;S. Ishida;Yutaka Arakawa
中科院分区：
文献类型：
--
作者：
Mitsuru Arita;Yugo Nakamura;S. Ishida;Yutaka Arakawa
我们介绍ZEL，这是第一个净零能耗生活记录系统，允许办公室工作人员收集他们在公司场所进行的时间，地点和活动的半永久性记录。ZEL通过使用具有不同特性的异构能量采集器实现高精度的生命记录。该系统基于每位员工佩戴的192克姓名牌形状的可穿戴设备，该设备配备两个比较器，可实现系统状态之间的无缝切换，从而最大限度地减少电池使用，并实现净零能耗，半永久性数据收集。为了证明我们的系统的有效性，我们进行了数据收集实验，11名参与者在一个实际的环境中，发现人依赖（PD）模型实现了8位识别准确率水平为87.2%（加权F-措施）和静态/动态活动识别准确率水平为93.1%（加权F-措施）。额外的测试证实了该系统的实际长期可操作性，并表明它可以实现99.6%的零能量运行率，即，净零能量操作。
We present ZEL, the first net-zero-energy lifelogging system that allows office workers to collect semi-permanent records of when, where, and what activities they perform on company premises. ZEL achieves high accuracy lifelogging by using heterogeneous energy harvesters with different characteristics. The system is based on a 192-gram nametag-shaped wearable device worn by each employee that is equipped with two comparators to enable seamless switching between system states, thereby minimizing the battery usage and enabling net-zero-energy, semi-permanent data collection. To demonstrate the effectiveness of our system, we conducted data collection experiments with 11 participants in a practical environment and found that the person-dependent (PD) model achieves an 8-place recognition accuracy level of 87.2% (weighted F-measure) and a static/dynamic activities recognition accuracy level of 93.1% (weighted F-measure). Additional testing confirmed the practical long-term operability of the system and showed it could achieve a zero-energy operation rate of 99.6% i.e., net-zero-energy operation.