Self-Powered Clamp-On Pyroelectric Tactile Sensor for Intelligent Recognition of Film Materials

Tactile sensors are a potential solution for material identification. However, current potential tactile sensors for material identification are pressed, expensive, and applications-confined. Here we report a clamped-on pyroelectric tactile sensor on the basis of a ferroelectric Bi 0.5 Na 0.5 TiO 3 material to identify different film materials. The fabricated device exhibits different heat absorption capacities while in contact with different materials, leading to a different temperature change in the ferroelectric material under the same illumination. As a result, the device can recognize different materials by comparing the pyroelectric charge via integrating the obtained current under the same irradiation of 365 nm light-emitting diode. The clamped-on pyroelectric tactile sensor can identify six individual materials with a high accuracy of 98.8% and a fast response of 40 ms. All of the above processes can be accomplished with an intelligent material identification system. The device provides a new solution for material identification and lays a foundation for smart factories and laboratories.