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Reactive control has the character of flexibility and timeliness. Aimed at the formation control of multiple robots, this paper presents a behavior-based method on it. In the process of moving to the goal, the robots take the leader-referenced technique. And the dynamic-dead-zone method is used to maintain the formation predetermined. The combination of potential-based avoidance and following-wall...
RFID (radio frequency identification) is a RF based identification system, where RF reader reads (and writes) data from each entity (RF tag). Upon request from reader, tags in reader's accessible RF range will respond, and if the number of tags is larger than 2, the reader cannot identify tags (collision). To avoid the collision, there are two previous approaches: ALOHA based and binary tree algorithm...
Obstacle detection is very crucial for mobile robots. The algorithm presented in this paper makes use of motion cues in the video streams. Firstly, we calculate optical flow at feature points. Then rotation of the camera and FOE (focal of expansion) are evaluated separately. Rotation and FOE value are refined according to an iterative linear method. Finally, we get inverse TTC (time to contact) with...
A novel approach for vehicles collision-avoiding is described. This approach combines the techniques of millimeter wave with image processing. The relative speed and position information of the object is detected by utilizing millimeter wave radar and the width information of it is obtained by a CCD camera, which fixed in the vehicle. The object's width is detected by difference method with the image...
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