Compared with tactile sensor based on electrical signal
optics-based tactile sensor has a better property
less influence of environment and higher interference resistance. An optics-based tactile sensor is made of skin-like elastic material with markers array inside. When a force is applied to the sensor
the elastic body deforms and the markers move. The camera captures image of the markers. Distribution of force is calculated by displacement of markers array. EP4CGX30 is used as main processing chip
the circuit is PCBs piled together and the totol size is 40 mm × 20 mm × 15 mm.
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references
Tactile sensing for dexterous in-hand manipulation in robotics—A review [J] . Hanna Yousef,Mehdi Boukallel,Kaspar Althoefer. Sensors & Actuators: A. Physical . 2011 (2)