POSITIONING SYSTEM USING RADIO FREQUENCY SIGNALS
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Accused Products
Abstract
A positioning system and method for determining a position of a machine are disclosed. The system may have an optical sensing device configured to generate determined shape data associated with a portion of the worksite at the position of the machine. The system may have a first signal device configured to transmit a radio frequency signal and receive a response signal. The system may have a second signal configured to receive the transmitted radio frequency signal and transmit the response signal. The system may have a controller in communication with the optical sensing device and at least one of the first and second signal devices. The controller may be configured to determine an approximate position based on the radio frequency signal and the response signal, identify a reference shape data corresponding to the determined shape data, and determine the position based on the approximate position and the reference shape data.
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Citations
32 Claims
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1-20. -20. (canceled)
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21. A system for determining a position of a machine in a worksite, comprising:
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an optical sensing device configured to generate determined shape data associated with a portion of the worksite at the position of the machine; a first signal device configured to transmit a radio frequency electromagnetic signal and receive a response signal; a second signal device configured to receive the transmitted radio frequency electromagnetic signal and transmit a second radio frequency electromagnetic signal as the response signal in response to receiving the radio frequency electromagnetic signal; and a controller in communication with the optical sensing device and at least one of the first and second signal devices, having a map of the worksite and a set of reference shape data associated with the worksite, the controller configured to; determine an approximate position of the machine on the map based on the radio frequency electromagnetic signal and the response signal, match the determined shape data to a reference shape data from a subset of reference shape data associated with the approximate position, and determine the position of the machine corresponding to the location of the matching reference shape data. - View Dependent Claims (22, 23, 24, 25, 26, 32)
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27. A method for determining a position of a machine at a worksite, performed by one or more computing processors, comprising:
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generating determined shape data associated with a portion of the worksite from an optical sensing unit; transmitting a radio frequency electromagnetic signal from a first signal device; receiving the radio frequency electromagnetic signal and transmitting a second radio frequency electromagnetic signal by a second signal device as a response signal in response to receiving the radio frequency electromagnetic signal; determining, by the one or more computing processors, an approximate position of the machine on a map of the worksite based on the response signal and an elapsed time associated with the radio frequency electromagnetic signal and the response signal; matching the determined shape to a reference shape data from a subset of reference shape data associated with the approximate position; and determining, by the one or more computing processors, the position of the machine corresponding to the location of the matching reference shape. - View Dependent Claims (28, 29, 30, 31)
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Specification