Biomechanical design of intelligent flexible pulse monitoring system based on biosensors

As the biosensor technology rapidly develops, the application of flexible sensors in health monitoring is receiving increasing attention. To achieve high-precision, non-invasive, and continuous blood pressure monitoring, a flexible pulse biosensor based on modified multi-walled carbon nanotubes is studied, designed, and prepared. The sensor adopts a dual conductive layer resistive structure and combines crack structure design to enhance the sensitivity and response speed of the sensor. This design fully considers the biomechanical properties to ensure that the sensor can adapt to the strain changes caused by human movement, thereby improving the accuracy and reliability of monitoring. In addition, the study combines time-frequency analysis methods with fast Fourier transform to extract key feature points of pulse signals and uses a BPNN model to predict current blood pressure values. The results show that within a small strain range, the response time of the sensor is only 56.14 ms, and the strain coefficient is as high as 1572.4, effectively achieving real-time monitoring. This high response speed and sensitivity enable the sensor to accurately capture changes in pulse waveforms related to biomechanics, providing more reliable data support. The error of the average arterial pressure obtained by the prediction model is only −0.070 mmHg, which proves the accuracy of the current blood pressure value prediction. In summary, the intelligent flexible pulse monitoring system based on biosensors studied can achieve high-precision real-time blood pressure measurement and has good stability and anti-interference ability, providing effective technical support for home health management and early monitoring of hypertension. This research not only promotes the development of biosensor technology but also provides a new research direction in the field of biomechanics.