Abstract: An apparatus includes (i) an absolute position sensor coupled to a case, the position sensor including a light sensor, and circuitry configured to determine an identifier within a barcode, the individual bars of the barcode being sensed by the light sensor, and (ii) a motion sensor coupled to the case, the motion sensor including a first magnetic field sensor, a code wheel having two or more magnets positioned to rotate in unison with a wheel of the moveable object, and encoder circuitry configured to determine an amount of rotation of the wheel of the moveable object based on an output of the first magnetic field sensor.

Abstract: An indoor navigational system determines a location of a moveable object in an indoor area and displays this location to a user. The system includes one or more dead-reckoning sensors, one or more absolute position sensors, and a processor. The processor determines the location of the moveable object based on signals received from the sensors. The system also includes a display device to display the location of the moveable object in a graphical representation of the indoor area based on messages from the processor indicating the location of the moveable object.

Abstract: An indoor navigational system determines a location of a moveable object in an indoor area and displays this location to a user. The system includes an absolute position sensor coupled to a case attached to a moveable object including a motion sensor coupled to a case including a first magnetic field sensor configured to detect a polarity of a magnet as the magnet passes in proximity to the first magnetic field sensor, a code wheel having two or more magnets alternately oriented with north and south polarities facing toward the first magnetic sensor, the code wheel positioned to rotate in unison with a wheel of the moveable object, and encoder circuitry configured to determine an amount of rotation of the wheel of the moveable object based on an output of the first magnetic field sensor.

Abstract: An apparatus includes (i) an absolute position sensor coupled to a case, the position sensor including a light sensor, and circuitry configured to determine an identifier within a barcode, the individual bars of the barcode being sensed by the light sensor, and (ii) a motion sensor coupled to the case, the motion sensor including a first magnetic field sensor, a code wheel having two or more magnets positioned to rotate in unison with a wheel of the moveable object, and encoder circuitry configured to determine an amount of rotation of the wheel of the moveable object based on an output of the first magnetic field sensor.

Abstract: An indoor navigational system determines a location of a moveable object in an indoor area and displays this location to a user. The system includes an absolute position sensor coupled to a case attached to a moveable object including a motion sensor coupled to a case including a first magnetic field sensor configured to detect a polarity of a magnet as the magnet passes in proximity to the first magnetic field sensor, a code wheel having two or more magnets alternately oriented with north and south polarities facing toward the first magnetic sensor, the code wheel positioned to rotate in unison with a wheel of the moveable object, and encoder circuitry configured to determine an amount of rotation of the wheel of the moveable object based on an output of the first magnetic field sensor.

Abstract: An indoor navigational system determines a location of a moveable object in an indoor area and displays this location to a user. The system includes one or more dead-reckoning sensors, one or more absolute position sensors, and a processor. The processor determines the location of the moveable object based on signals received from the sensors. The system also includes a display device to display the location of the moveable object in a graphical representation of the indoor area based on messages from the processor indicating the location of the moveable object.