A new hybrid nano-generator could revolutionize sports surveillance
A piezoelectric-triboelectric (PTSS) sports sensor composed of PENG, TENG and a transparent self-healing hydrogel-based stretch electrode was developed in a study published in the journal Nanomaterials.
Study: A scalable, self-healing hybrid nanogenerator for monitoring human movement. Image Credit: metamorworks / Shutterstock.com
The portable hybrid nanogenerator is elastic, translucent and stretchable and can be used as a portable motion tracking sensor, providing a new technique for sports science, motion detection and human-computer interface.
The mechanics of diving
Rip entry is an essential diving technique. The entry of divers into the basin is a phenomenon of solid-fluid interaction. This technique helps divers reduce the contact force as they adjust their hands into a square shape when entering the pool.
On the other hand, if the hands of the divers meet the basin in a stuck form, the water escapes into the zone of reduced pressure.
The greater the angle of the wedge, the greater the height of the wave and the greater the splash. As a result, divers must quickly form their hands into a square shape when entering the water.
The rip entry action is more than just sliding the hands in. Divers should perform this technique depending on the trajectory of the rotation, the speed at which they can bend their palms, and the position of the palm. To learn high quality movements, instructors and divers must scientifically monitor this technique throughout the training and practice phases.
The research focused on studying the tear entry technique in sports biomechanics. Even so, the analysis of this technique remains a niche market.
For starters, the joints of the fingers and palms are tiny, and a lonely high-speed camera cannot successfully record movement. In addition, the hands of the competitors must remain square before touching the water.
According to recent research, the majority of wearable sensors are only able to flex in the longitudinal direction. The extensibility and flexibility of these sensory devices need to be improved for twisting movements.
Meanwhile, when the capacitive and resistive sensors are submerged in water, there is a possibility of electrical leakage. Accordingly, a self-powered, flexible and flexible sensor which can be used to monitor “Rip entry” technology must be created. In addition, it could be useful for science training of divers and provide innovative ideas for various other sports monitoring purposes, such as backhand twisting and pulling motion in table tennis and shot put.
The design of the PTSS and its applications. (a) Scene of how the PTSS is used for sport. (b) Optical image of the PTSS (I), TENG (II), PENG (III) and the hydrogel (IV). (vs) Hydrogel manufacturing step. (D) Manufacturing step of the PVDF film and PDMS substrate and principle diagram of the PTSS association. © Zhu, Y., Sun, F., Jia, C., Zhao, T. and Mao, Y. (2022).
Advances in TENG and PENG devices
Fitness and sports have received increasing attention in recent times. With the advancement of the Internet of Things (IoT) and big data, a significant number of scalable intelligent motion sensors have been developed.
TENG (Triboelectric Nano-generator) and PENG (Piezoelectric Nano-generator) devices with good working performance, simple construction, low cost and long life advantages have already been produced.
Some studies have combined TENG and PENG, which can send the pressure, acceleration, and frequencies of unpredictable, low-frequency body movement signals to electrical devices, enabling wireless communication. Meanwhile, scientists examined the performance of TENG and PENG submerged in water, and tests revealed that they had a robust design architecture and functionality. However, the gadgets are bulky and contain solid constructions to follow the movements of the body.
Scenes of sealing, biocompatibility and self-healing. (a–vs) Test sealing. (D–F) Biocompatibility test. (g–I) Self-healing property of hydrogel. © Zhu, Y., Sun, F., Jia, C., Zhao, T. and Mao, Y. (2022).
Manufacture of a new self-powered piezo-triboelectric sports sensor
A new flexible and expandable self-healing composite nanogenerator has been developed for human motion detection sensors.
The TENG, PENG and hydrogel based electrodes constitute the self-powered sensor. The combination significantly improves the efficiency of power generation.
The contact-separation mode is used to realize the binding of triboelectric and piezoelectric phenomena, which further improves the reactivity and the measuring range. The hydrogel-based electrode has outstanding stretchability, compact size, optical transparency, strong biocompatibility, easy manufacture, low cost, and self-powering function which can withstand rigorous activity.
PTSS can detect many movements and activities simultaneously. On difficult sporting events, it has a beneficial monitoring impact. PTSS can transform mechanical energy into electrical energy, increasing the potential for carbon neutralization and peak CO2 emissions. This discovery also addresses the issue of wireless transmission and opens new avenues for wireless applications and sports science.
The actual test and wireless signal transmission system. (a,b) Wrist flexion test and its response. (vs,D) Wrist torsion test and its response. (e,F) Wrist rotation test and its response. (g,h) Output voltage and details of the 301C dive movement of athlete 1. (I,j) Output voltage and details of the athlete’s diving movement 2′s 301c. (k–m) Bluetooth wireless transmission system. © Zhu, Y., Sun, F., Jia, C., Zhao, T. and Mao, Y. (2022).
Continue Reading: Bringing Nanotechnology Into The Internet Of Things
Zhu, Y., Sun, F., Jia, C., Zhao, T. and Mao, Y. (2022). An expandable, self-healing hybrid nano-generator for monitoring human movement. Nanomaterials, 12(1). Available at: https://www.mdpi.com/2079-4991/12/1/104