Dual-Function Tactile Sensor with Linear Pressure and Temperature Perception at Low Degree of Coupling

Abstract

Multiinformation tactile perception is highly important for detecting the change of external environment and realizing the compliant control of the robot. However, the integration of dual-mode or multimode sensors with low coupling remains a challenge. Herein, a dual-function tactile sensor with linear pressure and temperature perception is reported. The pressure detection part contains the pyramid conductive film and flexible hemispherical electrode, which works as the piezoresistive material. A spiral nickel film works as a temperature-sensitive material for sensing the temperature of objects during approaching and while contacting. As a result, the dual-function sensor can detect the pressure in 0–100 kPa with a sensitivity of 11.5 kPa−1, while the temperature is in 25–65 °C with a sensitivity of 0.0032 °C −1. To be state of the art, the tactile sensor array is used for an active safety control of robotic arms, which can realize the perception and timely avoidance of sudden changes in external temperature and object collisions.