New technology allows robots to find targets by "seeing through walls"

According to foreign media reports, robots are now often used to select purchased items from freight warehouses, but most robots still cannot see through the walls. In other words, a new robot can basically do this, with only a little outside help. This experimental device, called RF-Grasp, was designed by a team led by Associate Professor Fadel Abid of the Massachusetts Institute of Technology.

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The robot itself is equipped with an articulated grasping arm, and an optical camera is installed on the wrist, which can recognize the target object according to the appearance of the target object. However, if the object is in a box on the other side of the wall--or under other items buried in the box--the robot will not be able to see it, making it impossible to find it.

To solve this problem, the researchers set up a separate radio frequency transceiver in the area where the robot operates. The device emits radio signals, which are reflected back by the radio frequency tags on the target object-even through walls. Just like other existing RFID systems, the tag modulates the return signal in a unique way, conveying information such as its location and what it is attached to.

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Once the radio transceiver determines the location of the item, it will wirelessly transmit the information to the RF-Grasp robot. When reaching that approximate position, the robot uses its camera to visually guide its arm and then move the debris to the side until it finds and grasps the desired object.

Adib said: "It first uses radio frequency to focus visual attention. Then you can use vision to navigate."

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