# Research Progress of Self-Powered Gait Monitoring Sensor Based on Triboelectric Nanogenerator
## 4 Conclusions and Prospects
It might involvemodifying the material's composition ratios, adjusting the manufacturing process parameters, or adopting novel fabrication techniques to ensure that the device can withstand repeated washing cycles without significant degradation of its performance or structure. * Stability and durability of the sensor. As a sensor for gait monitoring, the TENG is usually integrated with socks or insoles, or directly contacts the human skin. Gait monitoring is achieved during physical movement, so the impact of chemical substances in human sweat on the sensor cannot be ignored. These impacts may reduce the stability of the sensor. Moreover, environmental factors such as humidity and temperature can potentially compromise the sensor's performance stability. To solve the above practical problems, on one hand, it is essential to actively research and develop new anti-interference materials. These include corrosion-resistant electrodes, triboelectric polymers resistant to sweat and environmental changes, and materials stable in temperature and humidity. On the other hand, optimizing device encapsulation is crucial. This involves selecting waterproof, moisture-proof, and heat-insulating polymers for tight wrapping, designing a multilayer structure, and configuring ventilation holes rationally. This protects against external substances and balances pressure. Through these efforts, the stability and durability of TENG sensors are likely to be significantly enhanced, potentially promoting broader application in gait monitoring. * System integration and miniaturization. Currently, many gait diagnosis systems and auxiliary training systems based on TENG sensors are composed of multiple modules, which inevitably leads to a relatively large volume. A large volume may limit the application conditions. Therefore, achieving the functional integration of the system and the miniaturization of the device are the keys to the widespread application of the sensing system. For system integration, standardizing interfaces and communication protocols across modules is fundamental. Additionally, meticulous optimization of module design is necessary. Regarding equipment miniaturization, leveraging advanced manufacturing techniques, such as microelectromechanical systems (MEMS) and precision machining, holds great promise. These technologies allow the fabrication of high-precision components within confined spaces, enabling a higher degree of component integration. Through optimized spatial layouts and innovative multifunctional integration designs, multiple functional elements can be consolidated into a compact unit. This approach is likely to reduce the physical footprint of the equipment while maintaining its core functionality, potentially facilitating the broader adoption of TENG-based sensing systems across various applications. Conceptualization, R.Z. ; writing--original draft, J.L. and Y.M. ; writing--review and editing, A.Z. and T.Z. All authors have read and agreed to the published version of the manuscript. This research received no external funding. No new data were created or analyzed in this study. The authors would like to thank all participants of this study. The authors declare no conflicts of interest.