Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 51, Pages 61789-61798Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c19734
Keywords
pedometer; triboelectric nanogenerators; pressure sensor; amplifier; self-powered system; integrated system
Funding
- National Natural Science Foundation of China [62174115]
- Suzhou Science and Technology Development Planning Project: Key Industrial Technology Innovation [SYG202009]
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University [KJS2157]
- Xi'an Jiaotong-Liverpool University (XJTLU) Key Program Special Fund [KSF-A-18]
- China Postdoctoral Science Foundation [2021T140494]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- 111 Project
- Joint International Research Laboratory of Carbon-Based Functional Materials and Devices
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This work demonstrates an integrated self-powered real-time pedometer system using P-TENG technology and circuit design to improve accuracy and real-time capabilities of step counting, enhancing reliability and practicality for wearable self-powered electronic devices.
As accurate step counting is a critical indicator for exercise evaluation in daily life, pedometers give a quantitative prediction of steps and analyze the amount of exercise to regulate the exercise plan. However, the merchandized pedometers still suffer from limited battery life and low accuracy. In this work, an integrated self-powered real-time pedometer system has been demonstrated. The highly integrated system contains a porous triboelectric nano-generator (P-TENG), a data acquisition and processing (DAQP) module, and a mobile phone APP. The P-TENG works as a pressure sensor that generates electrical signals synchronized with users' footsteps, and combining it with the analogue front-end (APE) circuit yields an ultrafast response time of 8 ms. Moreover, the combination of a mini press-to-spin-type electromagnetic generator (EMG) and a supercapacitor enables a self-powered and self-sustained operation of the entire pedometer system. This work implements the regulation of TENG signals by electronic circuit design and proposes a highly integrated system. The improved reliability and practicality provide more possibilities for wearable self-powered electronic devices.
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