The thinnest sensor prototype the researchers have built so far is 1.7 centimetres thick and covers a measurement surface of 5 by 5 centimetres. However, the researchers are working on using the same technique to realise larger sensor surfaces that are equipped with several cameras, and can thus also recognise objects of complex shape. In addition, they aim to make the sensor thinner – they believe it is possible to achieve a thickness of just 0.5 centimetres using existing technology.
Robotics, sport and virtual reality
Because the elastic silicone is non-slip and the sensor can measure shear forces, it is well suited for use in robot gripper arms. “The sensor would recognise when an object threatens to slip out of the arm’s grasp so the robot can adjust its grip strength,” Sferrazza explains.
Researchers could also use such a sensor to test the hardness of materials or to digitally map touches. If integrated into wearables, cyclists could measure how much force they are applying to the bike through the pedals, or runners could measure the force that goes into their shoes when jogging. Lastly, such sensors can provide information important to developing tactile feedback, for example for virtual reality games.