Thermoregulatory integration in hand prosthesis and humanoid robots through blood vessel simulation

Abstract

Abstract In this paper, we introduce a new approach to give robotic faces a thermal signature similar to that of humans and equip prosthetic or robotic hands with a lifelike temperature. This enhances their detection by infrared cameras and promotes more natural interactions between humans and robots. This method integrates a temperature regulation system into artificial skin, drawing inspiration from the human body's natural temperature control via blood flow. Central to this technique is a fiber network simulating blood vessels within the artificial skin. Water flows through these fibers under specific temperature and flow conditions, forming a controlled heat release system. The heat emission can be adjusted by changing the dilation of these fibers, primarily by modulating the frequency of circulation. Our findings indicate that this approach can replicate the varied thermal characteristics of different human face and hand areas. Consequently, robotic faces appear more human-like in infrared images, aiding their identification by infrared cameras. At the same time, prosthetic hands achieve a more natural temperature, reducing the typical discomfort felt in direct contact with synthetic limbs. This study sought to address the challenges faced by the users of prosthetic hands. It also heralds a promising direction in humanoid robotics, fostering improved tactile interactions and redefining human–robot relationships. The innovative technique paves the way for further advancements, blurring the lines between artificial aids and natural biological systems.