Foldable cart with tracking arrangement
AssigneeFTR Systems, Inc
InventorsJian Zhang, Chunghsin Lee
Life of this patent
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Abstract
A foldable cart assembly having a user tracking arrangement so as to follow movement of the user during motion over a field. The cart assembly has a plurality of ultrasound and RF sensors in communication with corresponding sensors in a remote handset transmission device carried by the user. The sensors provide timing, direction and distance information to a central processor on the cart for instructing individual electrical motors empowering the respective direction and speed of rotation of the cart's wheels.
Claims20
A foldable four wheeled load carryable cart assembly system comprising:
- an elongated lower base frame arrangement having a set of wheels on a first half-end thereof, and a set of empowered computer controlled drive wheels on a second half-end thereof;
- a plurality of pivotable frame portions extending from one side of the second half end, wherein the first half end and the second half end of the lower base frame arrangement is foldable about a generally centrally located pivot axis thereon, and the plurality of pivotable frame portions are foldable about a set of intermediate spaced-apart pivot axes to permit the cart assembly to be folded into a compact hand-carryable configuration;
- and
- wherein the cart assembly system includes a wireless user-tracking arrangement thereon, and wherein the wireless user-tracking arrangement electronically instructs an onboard central processing unit computer to control the empowered drive wheels as to rotational direction and rotational speed, to permit the cart assembly to track and follow movement of a system's user during a user's path of motion.
A process for controlling the track, speed and direction of a collapsably foldable, central processor unit controlled, electronically motorized, individual drive wheeled, cart assembly system for use by a cart assembly user in a field of play, comprising:
- arranging a pair of spaced-apart wireless ultrasound transponders on a frame portion of the cart assembly;
- providing a carryable wireless location ultrasound transceiver device to a user of the cart assembly;
- sending a pair of corresponding ultrasound signals from the ultrasound transponders on the cart assembly to and receiving returned back ultrasound signals from the location transceiver device carried by a user;
- timing the pair of received ultrasound signals received back to the cart assembly by an onboard RF transponder;
- communicating the signals received by the ultrasound transponder . and the RF transponder to the central processing unit computer;
- and
- triangulating the signals so as to govern the electronic instructions to the individual drive wheels for the cart assembly to follow the user carrying the transponder device.
A collapsible wheeled load carryable autonomously mobile cart assembly system comprising:
- an articulable lower frame having at least two independently empowered drive wheels thereon;
- an articulable upper frame, with a first and a second sensor transponder arrangement thereon;
- and
- a central processing unit on the cart assembly to instruct the empowered drive wheels as to rotational requirements upon receipt of the central processing unit receiving time, direction and distance information from the first and second sensor transponder arrangement.
Dependencies are inferred from the claim text.