A Proximity and Tactile Sensor with Visual Multiresponse

Proximity and tactile multiresponse sensing electronic skin enriches the perception dimension, which is of great significance in promoting the intelligence of electronic skin. However, achieving real-time visualization in sensors such as proximity and tactile feedback remains a challenge. A proximity and tactile sensor with visual function is designed, which can realize optical early warning and electrical recognition when the object is near, and optical display and electrical output when the object is in contact. The sensing mechanism of the visual capacitive sensor is discussed, the detection range, linearity, sensitivity, and stability of the sensor are tested, and the relationship between force, capacitance, and light intensity is established. A 5 × 5 sensor array was prepared for object proximity detection and dynamic force trajectory detection. By combining machine learning to recognize optical information and electrical information, multifunctional intelligent human-computer interactive control is realized. Visual proximity and tactile sensors not only solve the real-time visualization challenge of tactile sensing but also promote the development of electronic skin to be multidimensional, multifunctional, and intelligent.