Data-driven flexible motion sensors have drawn more attention recently. Compared with the current mainstream motion capture technologies, like the depth-of-field camera with the environmental limitations, silicon-based inertial devices with a mismatch in mechanical properties between their rigid morphology and the soft biological tissues in a microenvironment, etc., wearable motion sensing technology presents obvious advantages. Here, we demonstrated theoretically and experimentally a conductive/dielectric heterogeneous-interface (CDHI) regulated motion sensor inspired by biological sensory systems. This kind of device can recognize both the motion directions and parameters of external objects with the corresponding potential signals, and the function can be further extended to 3D space through a programmed interface pattern and machine learning assistance. Results show that this potential amplitude can be up to ∼ 102 ± 5 mV, motion height up to 30 cm, and frequency as low as 0.2 Hz, motion space of 0°∼360° in horizontal direction and up-down in vertical direction, respectively. The practical feasibility was further explored for human finger interactive electronics successfully, including virtual interactive control, the Sokoban game, and human-hand/manipulator follow-up control, respectively. The proposed wearable 3D tactile communicator provides a new sensing experience that the present array sensors via a touch mode cannot offer.
Wang et al. (Wed,) studied this question.