Bionic Crackle Vibration Sensor With Wide Frequency Range and High Sensitivity for Motion Monitoring

Human physiological signals play a crucial role in the fields of health assessment, sports medicine, and human–computer interaction. However, human vibration signals exhibit a wide frequency range and significant amplitude variations, which impose greater demands on the sensors’ detection range and sensitivity. A Bionic Crackle Vibration Sensor holding a wide frequency range and high sensitivity, based on the highly sensitive vibration sensing mechanism of the slit sensilla in arthropod legs is designed. The sensor demonstrates exceptionally high sensitivity (GF =42755) and frequency resolution (0.1 Hz or $1\times 10^{-4}$ ) over a wide frequency range (0.1–10000 Hz). Our sensor can accurately monitor vibration signals within ground provoked by human walking and jumping, as well as the pulse and vocal cord vibrations. Gait monitoring systems that integrate our sensors with insoles are proved to be capable of monitoring walking speed. Our Bionic Crackle Vibration Sensor provides innovative technological solutions for wearable medical electronics and human–computer interaction interfaces, demonstrating significant application potential in health monitoring, sports rehabilitation assessment, and early warnings for sub-health conditions.