Spiral-patterned tactile sensor detects slippage direction and displacement
A research team developed an electronic fingerprint device that measures normal force, slippage direction, and displacement. The sensor uses a 12-by-12 pixel array arranged in a Fermat spiral pattern. Accuracy reached 0.85 degrees for direction and 0.091 millimeters for displacement.
finance.yahoo.comResearchers created an electronic fingerprint device that simultaneously measures normal force, slippage direction, and displacement. The device contains a force-sensitive unit and a 12-by-12 tactile pixel array arranged in a Fermat spiral pattern modeled on sunflower seed distribution.
The sensor achieved 0.85-degree accuracy in slippage direction and 0.091-millimeter accuracy in displacement. These figures represent improvements over prior tactile sensing systems that struggled to extract both direction and displacement data at high precision.
Robotic testing When integrated into robotic manipulation systems, the device restricted detected slippage to an ideal range. A remote writing demonstration showed the sensor performing in complex interactive tasks. The work was supported by the National Natural Science Foundation of China, Zhejiang Provincial Natural Science Foundation of China, Key Research and Development Program of Zhejiang Province, and Guizhou Provincial Science and Technology Projects.
The article was published 31 May 2026.
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