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An Intelligent Mobile Robot Navigation Technique Using RFID Technology - Presentation Transcript
An Intelligent Mobile Robot Navigation Technique Using RFID Technology
Reference Gueaieb, W. Miah, M.S. An Intelligent Mobile Robot Navigation Technique Using RFID Technology Instrumentation and Measurement, IEE Transactions on , Sept. 2008
Outline Introduction Related Work RFID Systems Proposed Approach Experimental Results Conclusion
Introduction (1/2) MOBILE robot navigation has stood as an open and challenging problem over the last few decades Most of the robot navigation algorithms proposed in the literature are either tailored toward particular structured environments or driven by an overwhelming degree of computational complexity. in some cases, the hardware needed to implement the algorithm can be more costly than the robot itself
Introduction (2/2) The proposed algorithm takes advantage of the emerging Radio Frequency IDenti cation (RFID) technology and a fuzzy logic controller (FLC) to guide the robot to navigate in its working space This navigation method is based on continuous encoder readings that provide the position, orientation, and linear and angular velocities of the robot Although several modules are involved in operating mobile platforms, such as, for example, the localization, navigation, obstacle detection, obstacle avoidance, and path planning modules, only the former two are considered here.
Related Work (1/2) The indoor mobile robot navigation presented in [6] uses a global ultrasonic system for the robot s position estimation while navigating in an environment Hallmann and Siemiatkowska developed a mobile robot B14 to navigate in a partially known environment Betge-Brezetz et al. focused on the high-level representation of the natural scene to guide a mobile robot in an a priori unknown environment Wijk and Christensen developed a algorithm for natural landmark extraction from sonar data streamed from a mobile platform
Related Work (2/2) Khubitz et al. presented a navigation system that uses RFID tags as arti cial landmarks Tsukiyama [20], where the robot tries to build a topological map of its surround- ing environment to be used in path planning and navigation Chae et al. proposed a mobile robot localization method with the help of a combination of RFID and vision technologies
RFID Systems (1/2)
RFID Systems (2/2) In this paper, we are particularly interested in the phase of the baseband signal received at the reader s end as a result of the tag s response. This phase is derived from the in-phase (I) and quadrature (Q) components of the received signal
Proposed Approach The general high-level architecture for the proposed navigation system consists of an RFID communication module and an FLC, in addition to the software performing data processing and computing the necessary control actions A. RFID Communication Module B. FLC C. Navigation Algorithm
Proposed Approach
RFID Communication Module Interested in the signal broadcasted by the tag representing the robot s destination at that time instant Let 1 and 2 be the phase angles of the signal received by the reader s reception antennas 1 and 2 However, that none of the commercially available RFID readers to date is capable of providing the necessary information to perform these calculations Using a custom- made RFID reader and a digital oscilloscope to con rm the fact that the phase difference de ned in (2)
RFID system setup to compute the phase difference
FLC The aim of the FLC is to decide on the amount of tune- up that the robot has to apply to its direction to converge to its target position
FLC s membership functions (a) Input membership functions (b) Output membership functions (not to scale)
Navigation Algorithm A navigation algorithm is needed to act as a supervisory control layer to process and coordinate the efforts of the RFID communication module and the FLC on one hand and to pass the FLC s output control actions to the robot s relevant actua- tors on the other hand
Experimental Results A. Following a Line Segment B. Following a Complex Path C. Following a Hallway
Experimental setup for following a line segment
Proposed algorithm s performance in following a line segment (an initial orientation of 90 )
Proposed algorithm s performance in following a line segment (an initial orientation of 0 )
Experimental setup for following a complex path
Proposed algorithm s performance in following a complex path with acute angles
Experimental setup for hallway following (not to scale)
Proposed algorithm s performance in following a hallway
Conclusion The algorithm can guide the robot to under any RFID tag by a simple intelligent processing of the phase difference of the signal sent by the tag and received at both antennas of the RFID reader mounted on the robot A new class of robot navigation techniques that are simple, computationally cost effective, and modular in the sense that they are independent of any speci c robot architecture
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