Our work on energy harvest activity recognition has been accepted for IEEE PerCom2022 (CORE 2021 A*) to be held online in March 2022.
In our previous research, EHAAS presented at PerCom2019, we presented a feasibility study on the idea of combining multiple energy harvesting elements and using their generated power as a sensor value for localization.
Ideally, if the microcontroller that measures the amount of generated power could also be run by the energy harvesting. However, it was only a conceptual proposal in EHAAS. So, we have used five solar cells on the device, and it was too big to be called a wearable.
To solve this problem, we redesigned the circuit, and succeeded to develop a new wearable sensors with a case the size of a CD case and two solar cells. We showed that our device does not need to be recharged and is capable of life logging In addition to place recognition, we also added activity recognition using piezoelectric elements to complete a system that can record where you’ve been and what you’ve been doing.