Abstract

The Piezo Health Sensor is a battery-free, implantable health monitoring system that utilizes fundamental principles of signals and systems to accomplish long-term health estimation. Tap or touch operations are regarded as input excitation signals and converted to electrical signals by piezo- electric energy conversion. These raw and unprocessed electrical signals are conditioned, rectified, filtered and energy is regulated stored in order to constitute the stable DC supply which drives the system. Biological input signals, such as heart rate (HR), SpO2, temperature and humidity are recorded from physiological parameters. These are sampled, digitized and processed with simple DSP (Digital Signal Processing) in the microcontroller. Finally, the processed output signals are displayed on an LCD screen or wirelessly transmitted by IoT communication modules for remote monitoring. The generated power will allow the low-energy biomedical sensors and ESP32/ESP8266 microcontroller to work perpetually in real-time or in Remote or WPT conditions. This integrated device offers a sustainable, eco-friendly and cost- effective substitute to battery-reliant health monitoring devices, while operates on the basis of simultaneous three-in-one energy conversion, signal acquisition, and digital processing system and hence it is very useful for rural health care, emergency response or wearable biomedicine applications.