Researchers at the SEOUL National University of Science and Technology in Korea have developed a 3D -printed tactile sensor using auxiliary mechanical metacaternies (AMMS), which offer high sensitivity, stability and versatility for portable devices, robotics and surveillance of the healthcare system. By using the counterintuitive internal contraction of materials with a negative POISSON ratio, the platform promises to redefine real-time tracking of human movement, attitude and health.
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Auxetian meta materials for advanced tactile caps
Tactile sensors convert external stimuli – such as pressure and strength – into electrical signals and play a crucial role in robotics, prosthetics, portable technology and health care. Mechanical meta materials, especially AMMS, improve the sensor performance with its unique negative Poisson ratio, which focuses on stretching under compression. This behavior enables sensors to achieve a greater sensitivity, a reduced overlap between units and greater operational stability, which is suitable for integration into portable electronics and robot systems.
In order to overcome the challenges for the production and integration, the Seoultech team, under the direction of the student of master's student Mingyu Kang and Associate Professor Soonjae Pyo, developed a 3D-collectile tactile recording platform. The sensor has a cubic grille with spherical cavities and is generated using DLP -3D printing (Digital Light Processing). It works in the capacitive and piezoresistive modes: capacitive detection measurements measures the pressure by changes in the electrode spacing and the dielectric distribution, while the piezoresistive invention uses a carbon nanotube network that changes resistance under load.
Kang Explains: “The Unique Negative Poisson's Ratio Behavior Utilized by our Technology Induces Inward Contraction Under Compression, Concentrating Strain in the Sensing Region and Enhancing Sensitivity. Aspects: Sensitivity Enhancement Through Localized Strain Concentration, Exception Performance WHEN Embedded Within Confined Structures, and Crosstalk Minimization Between Adjacent Sensing Units. Disorders if they are integrated into devices such as intelligent insoles or robot gripper.
Applications and future potential
The researchers showed two Proof-of-Concept applications: a tactile array for spatial printing mapping and object classification as well as a portable inner sole system for analyzing gear monitoring and pronation. The sensors, which are embedded in intelligent insoles, can recognize the sub -pronation and over -civil servants and add feedback to foot peak in real time. They could also be integrated into robot hands for object manipulations or portable health monitoring systems that prioritize comfort and inconspicuous detection.
With a view to the 3D -printed auxetic tactile sensors, the next generation of portable electronics, personalized prostheses and immersive haptic systems could advance. Your adaptable structures and material independence enable customer -specific, application -specific designs in medicine, robotics and interactive technologies.
Global impulse with tactile invention
Seoul's work contributes to a growing wave of innovations in tactile recording. At the beginning of this year, researchers from Johns Hopkins University (JHU), Florida Atlantic University (FAU) and the UIC of the University of Illinois Chicago (UIC) developed a hand prosthesis to imitate the human note. This development could improve prosthetic solutions for people with hand loss and refine the interaction of robotic arms with physical environments.
In Italy, researchers at Scuola Superiore Sant'anna, the Ca 'Foscari University of Venice and Sapienza University of Rome created the 3D printed skin, which successfully imitated the function of Ruffini receptors, a kind of cell that was found on subcutaneous human skin tissue, the stretching distances, vibration, warm and prags. As soon as the skin has been bound to a robot and associated with a deep learning algorithm (CNN), the skin can estimate the strength and the point where the robot comes into contact with an object, and may enable human robots to be cooperated in the future.
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The proposed image shows the proposed metasmaterial -based tactile recording technology. Image about Seoultech.