Abstract: A motion analyzing apparatus and method for a portable device with an output unit is provided. The motion analyzing apparatus comprises a motion database for storing at least one motion pattern or a music database for storing at least one music data, a motion sensor unit for sensing displacement variations of the portable device and outputting corresponding motion signals, and a microprocessor unit for receiving the motion signals, comparing the motion signals with the motion patterns of the motion database, and controlling the output unit according to the comparison result. The motion analyzing apparatus utilizes the portable device to play games and has abundant entertainment and versatile content by working with the body motion of the user.

Abstract: A visual navigation system provides absolute position information to multiple automatically guided vehicles (AGVs) such as mobile robots. The beacon-equipped AGVs emit light visible to overhead television cameras. The beacons are arranged and controlled so that the vision systems can acquire, measure, and report the locations of multiple AGVs. The system controller incorporates a programmable "factory map", or knowledge base, of allowable paths of travel for the AGVs, which navigate by dead reckoning with periodic position updates from the visual navigation system. The visual navigation system notifies the autonomous AGVs and the system controller when an AGV strays from its command path. The combination of computer controls in the elements of the system provides the means to stop and to recover straying AGVs. The navigation system visually monitors normal AGV travel, off-course corrections, "lost" AGV searches, and recovery. Thus, it provides closed-loop, servo-like operation.