{'fraction_non_alphanumeric': 0.022433132010353754, 'fraction_numerical': 0.011216566005176877, 'mean_word_length': 5.2032085561497325, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Energy Harvesting from Human Biomechanical Energy for Health-monitoring Devices

ABSTRACT Conversion of human biomechanical energy into electrical form leads to the development of triboelectric nano-generator (TENG) for the operation of low-power health-monitoring devices. Here, we report a self-powered energy conversion system for sustainable operation of health-monitoring devices consisting of a TENG, an ac–dc converter, and a buck converter. The portable TENG comprising films of polytetrafluoroethylene, Mylar, and aluminium converts rotational motion into useful electricity. We have demonstrated the use of TENG as a power source for health-monitoring devices such as pulse rate monitor and thermometer. It is also capable of measuring the speed of cycling using an odometer and moisture content in the atmosphere using a hygrometer. The maximum energy is found to be 1269 µJ/cm3 across a 1000 µf capacitor. Also, the maximum power across a 2 MΩ resistor is 240 µW. Such portable systems can act as a power source by harvesting human biomechanical energy while cycling for low-power electronics useful for medical diagnostics and fitness monitoring.