Flexible PVDF nanogenerator-driven motion sensors for human body motion energy tracking and monitoring

With the rapid development of nanogenerator technology, intelligent motion sensors, wearable electronic devices, and human–computer interaction have received more and more attention. However, traditional motion sensors are limited by factors such as external power supply and their own volume and do not have the characteristics of flexibility, high intelligence, and high integration of modern sensors. This paper studied and realized a matrix motion sensor based on flexible PVDF hybrid material, which worked under piezoelectric mechanisms. The performance test of the prepared motion sensor proves that the device has good environmental adaptability. Its output performance is characterized. Under the test conditions of 3 Hz and 300 N, the output voltage of the nanogenerator is 15 mV. On this basis, the nanogenerator is used for the collection of human movement energy and the monitoring of human motion status, and through the design of electronic skin and human–computer interaction testing, it shows the huge application of flexible nanogenerator movement state monitoring and human health monitoring potential. We believe that the proposed flexible, low cost, hybrid nanogenerator will supply an effective method for energy harvesting devices.