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Globally, about 18.6 million people suffer from diabetic foot ulcers each year. Among diabetic patients, 80% of lower limb amputations are related to foot ulcers. This complication not only seriously affects the quality of life of patients, but also significantly increases the risk of death. Therefore, multidisciplinary comprehensive care has become the preferred treatment for diabetic foot ulcers.
In clinical diagnosis and early intervention, smart insoles can be used to measure plantar pressure and analyze gait, posture and foot health. However, current sensor platforms are bulky and limited to indoor or clinical environments. Based on this, the development of special insoles for rehabilitation and treatment has become an important development trend.
Recently, the team of Professor Wei Qufu of Jiangnan University published a research result entitled "Therapeutic Smart Inside Technology with Archimedean Algorithmic Spiral Triboelectric Nanogenerator Based Power System and Sensors" in Advanced Fiber Materials. Using a high-efficiency power supply guided by "first principles", a flexible and portable multifunctional smart insole was developed.
The main point of this paper
The Archimedean spiral structure of the insole is shown in Figure 1. It has the function of a friction nanogenerator (TENG) and uses biopolymer materials as a self-powered system for the friction electrode layer. At the same time, the insole has excellent electrical properties such as voltage (VOCVOC), current (ISC), current density (JSC) and power density (PD), and can be used for clinical and personal plantar pressure measurement, with better performance than commercial FSR sensors. This system can also analyze gait, posture and other foot diseases, laying the foundation for the realization of flexible, flexible and multifunctional portable sole monitoring technology. The technology is powered by a TENG power source and can be integrated into the Internet of Things system in the future.
The main functions of the smart insole are self-powered and monitored. After 8000 cycles of contact and release at 10 kPa and 6 Hz, the results show that it has a stable open circuit voltage, showing excellent long-term service performance and energy output stability; at the same time, it also proves that the power supply system of the insole can power a variety of electronic devices.
Figure 2 (a) shows the complete components of the integrated smart insole system, and Figure 2 (b) shows that the electricity generated on the TENG insole can make the LED light up. Through real-time gait analysis and commercial force-sensitive resistor (FSR) testing, it is shown that the developed smart insole can act as a sensing element in actual application scenarios, and the sensor insole system matches the performance of commercial FSR.
Figure 3 shows the TENG sensor system used to analyze the contact status between the foot and the sensor, including the contact status and pressure distribution of the sole, toes, heel, arch, midfoot, and forefoot areas, as well as foot pressure signal acquisition, simulation, and system integration, which highlights its value in practical applications and also indicates that it has great development potential in the market.
Electrospinning Nanofibers Article Source:
https://link.springer.com/article/10.1007/s42765-024-00443-3
